Controlled transmission system
Abstract
A motor drive system of the main vessel, the main transmission and the propeller shaft is supplemented with a branch power transmission that enables the transmission in both directions. Branch includes an auxiliary engine, an alternating current generator selectively connected to the auxiliary engine and a transmission unit interposed between the shaft controlled by a branch of the main transmission and the generator shaft. The unit includes two planetary gear sets of different transmission ratio, the sun gears are mounted on the generator shaft, and a spider common to the two planetary gear sets is mounted on the arm shaft, the two internal ring gears for the planetary gears are selectively, one by one or no immobilized for transmitting power to the respective speed ratio.
Description
Proceeding now to the detailed description of the drawings, FIG . 1 illustrates a part of the drive system of a boat , particularly for driving a propeller shaft 2 . That axis and is driven directly by a main transmission 1, which includes a relatively large gear 3 . Axial forces axis 2 are taken by the thrust bearings 34 .Gear
3 is driven through another gear in the gear stage (not shown ) which
in turn is driven by the main diesel engine of the ship also not shown .
The part of the system, ie , the major axis subsystem engine - transmission - is conventional propeller . The
main object in question has to drive and run , for example, an ac
generator 9 at a constant speed, even though the ship propulsion speed
varies .A
pressure medium operated clutch 10 permits selective attachment of the
generator 9 to an auxiliary motor 11 as electric power may have to be
generated even if the main motor has stopped. The input side of the clutch unit 10 is connected to the auxiliary diesel engine accordingly. The output side clutch drive 10 is connected to a hollow shaft 31 which is the main generator 9. This
shaft , as well as others , infra, are traversed by a conduit 32 which
may be just the hole in the shaft, but rotates with the shaft. 27 A supply of pressure medium , for example, pressurized air is supplied to the conduit 32 through a suitable coupling 28. In this way , pressurized air is fed to an inlet 33 of the clutch 10 . Therefore,
there is provided an axial feed system for the clutch 10 for
selectively connecting an auxiliary motor generator 9 or 11 to
disconnect these devices from each other .Whenever the main motor runs , generator 9 is harnessing the power of it , especially from and through the main transmission 1. The auxiliary engine 11 is not running when the main motor works , although it is quite possible . To
perform the main engine generator 9 , a combination of two transmission
stages clutch 7 is interposed which is the main device of interest
here. Controlled
transmission unit 7 is coupled to the main transmission 1 so that the
structure and mounting are concerned, but also with respect to an input /
output rotation.The
main transmission 1 includes a spur gear 4, which is driven by the
large gear 3 and is mounted on a hollow shaft 5 which, in turn, is
articulated on the box or transmission case 1 by means of bearings 6 . It is worth mentioning that the small circles generally illustrated in FIG . 1 various bearings . Axis 5 is the normal input shaft unit 7 . The
output side of the unit 7 is connected to a flexible coupling 8, which
in turn is connected to drive generator 9 through the aforementioned
hollow shaft 31. Clutch input 8 is connected directly to a hollow shaft 16 and the main function unit 7 is for coupling the shaft 5 to shaft 16. One may consider the axes 5 and 16 as parts of unit 7 . 5 receives the axle shaft 16 and follows the second path or fluid line 32 from the pressure source 27 in the clutch 10 . This
fluid passes through the path also elastic coupling 8 as it continues
to the hollow interior of the shaft 16 on the shaft 31.Additional diesel engine 11 may sometimes serve as a first motor at low speed . The power transmission direction is a one invested in this case . Shaft
16 is driven by motor 11 and the drive shaft 5 7 couples thereto which ,
in turn , will drive the main drive gear shaft 1 and helix 2 .Furthermore,
it should be noted that the shaft 16 is provided as an input shaft for a
bevel gear 23 whose output shaft 26 drives a secondary users , such as
water pumps . The bevel gear drive 23 includes bevel gear meshing 24 and 25 respectively mounted on shafts 16 and 26 , and rotation therewith.The
two gear shift stages and controlled transmission 7 ( see also Figure
2. ) Consists of a casing 22 is of drum-shaped configuration . Axis or better means that traverse drum shaft 16 concentrically and entirely , while the shaft 5 carries coaxially drum side. . Figure 2 shows that the shaft 16 is not uniform device , but ends within the unit 7 . A
coupler 61, and a fluid conduit 62 and then provide a shaft portion 16 "
whose significance will be described shortly. The input shaft and
through hollow shaft 5 is , in fact, functionally a continuation of the
shaft 16 . By differentiation structural reasons that the continuation is denoted 16 'in FIG . two .Unit
7 further includes first and second branches of gears, respectively
established by two planetary gear sets 12 and 13 of different speed
reduction (or increase , depending on the direction of power
transmission ) . The
two planetary gears respectively have Sun gears 14 and 15, both being
connected to and sit on the portion 16 " of the shaft means 16 . Both
gear sets have a common planet carrier or spider 17. Can also mean that
both spiders of both planetary gears are structurally combined , or at
least , interconnected . uniform This planet carrier having a tubular
extension 35 which is a hollow shaft. or extension shaft 35 is connected
to the shaft 5 by means of a sleeve coupler 34 .The
two planet gear sets 12, 13 are provided respectively with internal
ring gears 18 and 19 of different diameters into account different
ratios of the two sets of gears. These
internal ring gear mesh , respectively , with two planetary gear sets
such as 29 and 30 coaxially mounted and articulated in pairs, one for
each pair together in the carrier or spider 17. The planetary gears having different diameters and , of course, also mesh with their respective sun gears .The
two internal ring gears 18 and 19 are respectively individually
connectable to the housing 22 by means of the clutches 20 and 21. The clutches are of a variety of friction and which are operated by a pressurized fluid . Accordingly,
each clutch 20 and 21 are respectively provided with annular pistons 36
and 39 disposed in piston chambers 37 and 40 of corresponding
configuration. By
pressing one of these cameras , the respective clutch discs 38 and 41
are urged toward each other to activate the respective clutch and to
engage the respective ring gear to the housing 22 . Therefore, the function of the grip is to immobilize the respective internal ring gear or to allow idling.Supplying pressurized fluid to the chambers is not shown and is conventional. The
problems do not arise because the case 22 is stationary, and is , in
fact, structurally combined with the housing for the main gear 1 (see
fig . 1). The system as described operates as follows , and in one of four states or different operating modes .The first state to consider is normal cruising . In this case, the clutch 20 is activated and placed in time clutch 21 remains deactivated . The main motor operates to drive the transmission 1, but the auxiliary motor 11 is stopped. Therefore,
power is transmitted by the main motor for the propeller shaft 2 and
the one transmission gear 4, diverts a portion of the power driving the
shaft 5 . Now shaft 5 is drivingly connected to the shaft 16 through the planetary gear mechanism 12 as follows. The shaft 5 common support units 17 and the planetary gears 29 mesh the ring gear 18 fixed and immobilized . Therefore,
these planetary gears 18 that revolve and toothed , driving its
associated gear 14 which in turn drives shaft 16 , according to the gear
ratio ( increased velocity) of the gear set 12.The resulting rotation of the shaft 16 is also transmitted to the sun gear 15 with which the planets 30 mesh . They rotate with the carrier 17 and rotated according to the rotation axis 16 , so that ring gear 19 is rotated . No power or torque is transmitted through this branch , except for minimum idle losses . Therefore, it can be seen that the two clutches must not be energized simultaneously.The clutch 10 is relieved so that the motor 9 is driven through the flexible coupling 8 shaft 16. Furthermore, the device is being driven in the auxiliary shaft 26. The speed of shaft 16 is constant as the speed of the main motor.The
second state or mode to be considered is a low speed, as needed , for
example, for maneuvering the ship through narrow waters . The main engine is assumed to run on a low speed accordingly in particular is also constant . In
this case, the clutch 21 is pulled to connect the ring gear 19 of the
stage 13 to the box 22 , while the clutch 20 is released . Therefore,
the axes 16 and 5 are also interconnected in this way, but the two sets
of gears 12 and 13 have different transmission ratios so that today the
speed ratio is different from its value in one mode . Accordingly,
the transmission ratio increases and since the shaft 5 rotates at a
lower speed , the shaft 16 rotates at the same speed in one mode . Idle Gear September 12 , the clutch 10 is being disconnected and the motor 11 are being detained.The
third state or mode assumes that the main engine has stopped and a
clutch ( not shown) that the engine is disconnected from the
transmission 1. Moreover, motor 11 starts and clutch 10 is activated to drive generator 9 and the shaft 16 through the coupling member 8 . Clutch 21 activates and deactivates the clutch 20 . Accordingly,
idle gear assembly 12 and the torque and power is transmitted through
the gear set 13 of the shaft 16 in the shaft 5 . Reducing the speed is relatively large so that the shaft 5 rotates relatively slowly . The propeller shaft 2 is now driven through the gears 4 and 3 . The auxiliary equipment in the shaft 26 is driven at the speed of shaft 16.It
is conceivable , from a general standpoint , another way is possible as
far as regards unit 7 , in which the clutch 20 is energized and 21 is
de-energized, while the engine 11 runs . This imparting high speed on the propeller shaft 2 may not be possible due to the nominal power. However,
if a clutch is disconnected , for example, gears 4 shaft 5, a secondary
user that require high speed can be driven in this case.The fourth state and how to stop the ship calls . Both
clutches 20 and 21 are released and turned off, but the engine 11 is
executed to drive the generator 9 and the shaft 16 for operation of the
auxiliary equipment in the shaft 26. The two sun gears 14 and 15 embodiment, but the axis 5 is , in fact, in the hands of helix immobilized . Therefore,
the carrier 17 is at rest and the rotation of planetary gears but no
revolving drive their respective crowns , that start , since the
clutches 20 and 21 do not connect either of them to the stationary case
22.The
invention is not limited to the embodiments described above but all
changes and modifications thereof not constituting departures from the
spirit and scope of the invention are intended to be included.
DESCRIPTION OF THE DRAWINGS
While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention , it is believed that the invention , objects and features of the invention and other objects, features and advantages thereof will be better understood from the following description taken in connection with the accompanying drawings in which:. Figure 1 is a schematic view of a transmission system for a vessel which includes the controlled transmission of the invention;. Figure 2 is a cross section through the controlled transmission taken by itself .
Background of the Invention
The present invention relates to a two-stage gear shifting apparatus , and particularly for example, for transmissions in drive systems for ships.It is generally known to branch the power supply from the main engine of a ship for the purposes of conducting secondary users. These secondary users , however, depends on the main engine rpm starts to have and run at any moment . In some cases, this is not of importance . For example, a water pump as a secondary user , the supply of cooling water for the engine , actually less water can be pumped when the engine operates at a lower speed . However, the situation is very different in other cases , such as an alternating current generator that must function at a constant rpm . Devices are known to cause such a generator to be driven at a constant speed even though the first movement speed varies significantly. However, the equipment required here is quite complex and expensive , especially if the transfer of power to the generator is quite high .The last issue to be considered in greater detail . For normal cruising speed of a ship, in fact, and you can expect their diesel engines to operate at a speed that is sufficiently constant for the direct operation of a ac generator. In other words, relatively little is involved normally to run the engine of the ship at a constant chord, which is desirable from the point of view of the ship propulsion anyway. However, when the ship maneuvers through narrow waters , for example, in port the engine speed is often considerably reduced, for example, third, for safety reasons . Thus , one transmission will now overlaps again increase the actual speed being applied to the generator. In other words , there is a need for a transmission to be brought , if the engine speed decreases .
DESCRIPTION OF THE INVENTION
It is an object of the present invention is to provide a new and improved controlled transmission for use in a boat drive system , which allows in particular driving a generator from the main engine of the ship , despite the latter can operate at different speeds.According to the preferred embodiment of the invention, a controlled transmission is suggested having a stationary case which lead two axes. The box contains two planetary gear sets different transmission ratios . The two sun gears are connected to a shaft and supports planetary gears are connected to the other shaft , the carriers are preferably of uniform construction . The two ring gears are selectively connectable to the housing by means of clutches, one by one (or none ), the other idle accordingly. Power is transmitted through the planetary gearing crown wheel which is held in the case , and the gear ratio is determined accordingly.In regard to the application to a ship drive system , high-speed shaft can be connected to a generator and the low speed shaft is connected to the main transmission gear , which is driven by the main engine of the ship , and power is taken for the propeller shaft . An auxiliary motor can be selectively connectable to the high speed shaft through a clutch pressure medium drive . The system of the invention includes provisions for supplying pressure medium to clutch it is quite difficult to achieve.Such a system allows the generator to be operated at constant speed regardless of whether or not the main motor is running at high or low speed , or if the energy is taken from the auxiliary motor in place.
Abstract
A motor drive system of the main vessel, the main transmission and the propeller shaft is supplemented with a branch power transmission that enables the transmission in both directions. Branch includes an auxiliary engine, an alternating current generator selectively connected to the auxiliary engine and a transmission unit interposed between the shaft controlled by a branch of the main transmission and the generator shaft. The unit includes two planetary gear sets of different transmission ratio, the sun gears are mounted on the generator shaft, and a spider common to the two planetary gear sets is mounted on the arm shaft, the two internal ring gears for the planetary gears are selectively, one by one or no immobilized for transmitting power to the respective speed ratio.
Description
Proceeding now to the detailed description of the drawings, FIG . 1 illustrates a part of the drive system of a boat , particularly for driving a propeller shaft 2 . That axis and is driven directly by a main transmission 1, which includes a relatively large gear 3 . Axial forces axis 2 are taken by the thrust bearings 34 .Gear
3 is driven through another gear in the gear stage (not shown ) which
in turn is driven by the main diesel engine of the ship also not shown .
The part of the system, ie , the major axis subsystem engine - transmission - is conventional propeller . The
main object in question has to drive and run , for example, an ac
generator 9 at a constant speed, even though the ship propulsion speed
varies .A
pressure medium operated clutch 10 permits selective attachment of the
generator 9 to an auxiliary motor 11 as electric power may have to be
generated even if the main motor has stopped. The input side of the clutch unit 10 is connected to the auxiliary diesel engine accordingly. The output side clutch drive 10 is connected to a hollow shaft 31 which is the main generator 9. This
shaft , as well as others , infra, are traversed by a conduit 32 which
may be just the hole in the shaft, but rotates with the shaft. 27 A supply of pressure medium , for example, pressurized air is supplied to the conduit 32 through a suitable coupling 28. In this way , pressurized air is fed to an inlet 33 of the clutch 10 . Therefore,
there is provided an axial feed system for the clutch 10 for
selectively connecting an auxiliary motor generator 9 or 11 to
disconnect these devices from each other .Whenever the main motor runs , generator 9 is harnessing the power of it , especially from and through the main transmission 1. The auxiliary engine 11 is not running when the main motor works , although it is quite possible . To
perform the main engine generator 9 , a combination of two transmission
stages clutch 7 is interposed which is the main device of interest
here. Controlled
transmission unit 7 is coupled to the main transmission 1 so that the
structure and mounting are concerned, but also with respect to an input /
output rotation.The
main transmission 1 includes a spur gear 4, which is driven by the
large gear 3 and is mounted on a hollow shaft 5 which, in turn, is
articulated on the box or transmission case 1 by means of bearings 6 . It is worth mentioning that the small circles generally illustrated in FIG . 1 various bearings . Axis 5 is the normal input shaft unit 7 . The
output side of the unit 7 is connected to a flexible coupling 8, which
in turn is connected to drive generator 9 through the aforementioned
hollow shaft 31. Clutch input 8 is connected directly to a hollow shaft 16 and the main function unit 7 is for coupling the shaft 5 to shaft 16. One may consider the axes 5 and 16 as parts of unit 7 . 5 receives the axle shaft 16 and follows the second path or fluid line 32 from the pressure source 27 in the clutch 10 . This
fluid passes through the path also elastic coupling 8 as it continues
to the hollow interior of the shaft 16 on the shaft 31.Additional diesel engine 11 may sometimes serve as a first motor at low speed . The power transmission direction is a one invested in this case . Shaft
16 is driven by motor 11 and the drive shaft 5 7 couples thereto which ,
in turn , will drive the main drive gear shaft 1 and helix 2 .Furthermore,
it should be noted that the shaft 16 is provided as an input shaft for a
bevel gear 23 whose output shaft 26 drives a secondary users , such as
water pumps . The bevel gear drive 23 includes bevel gear meshing 24 and 25 respectively mounted on shafts 16 and 26 , and rotation therewith.The
two gear shift stages and controlled transmission 7 ( see also Figure
2. ) Consists of a casing 22 is of drum-shaped configuration . Axis or better means that traverse drum shaft 16 concentrically and entirely , while the shaft 5 carries coaxially drum side. . Figure 2 shows that the shaft 16 is not uniform device , but ends within the unit 7 . A
coupler 61, and a fluid conduit 62 and then provide a shaft portion 16 "
whose significance will be described shortly. The input shaft and
through hollow shaft 5 is , in fact, functionally a continuation of the
shaft 16 . By differentiation structural reasons that the continuation is denoted 16 'in FIG . two .Unit
7 further includes first and second branches of gears, respectively
established by two planetary gear sets 12 and 13 of different speed
reduction (or increase , depending on the direction of power
transmission ) . The
two planetary gears respectively have Sun gears 14 and 15, both being
connected to and sit on the portion 16 " of the shaft means 16 . Both
gear sets have a common planet carrier or spider 17. Can also mean that
both spiders of both planetary gears are structurally combined , or at
least , interconnected . uniform This planet carrier having a tubular
extension 35 which is a hollow shaft. or extension shaft 35 is connected
to the shaft 5 by means of a sleeve coupler 34 .The
two planet gear sets 12, 13 are provided respectively with internal
ring gears 18 and 19 of different diameters into account different
ratios of the two sets of gears. These
internal ring gear mesh , respectively , with two planetary gear sets
such as 29 and 30 coaxially mounted and articulated in pairs, one for
each pair together in the carrier or spider 17. The planetary gears having different diameters and , of course, also mesh with their respective sun gears .The
two internal ring gears 18 and 19 are respectively individually
connectable to the housing 22 by means of the clutches 20 and 21. The clutches are of a variety of friction and which are operated by a pressurized fluid . Accordingly,
each clutch 20 and 21 are respectively provided with annular pistons 36
and 39 disposed in piston chambers 37 and 40 of corresponding
configuration. By
pressing one of these cameras , the respective clutch discs 38 and 41
are urged toward each other to activate the respective clutch and to
engage the respective ring gear to the housing 22 . Therefore, the function of the grip is to immobilize the respective internal ring gear or to allow idling.Supplying pressurized fluid to the chambers is not shown and is conventional. The
problems do not arise because the case 22 is stationary, and is , in
fact, structurally combined with the housing for the main gear 1 (see
fig . 1). The system as described operates as follows , and in one of four states or different operating modes .The first state to consider is normal cruising . In this case, the clutch 20 is activated and placed in time clutch 21 remains deactivated . The main motor operates to drive the transmission 1, but the auxiliary motor 11 is stopped. Therefore,
power is transmitted by the main motor for the propeller shaft 2 and
the one transmission gear 4, diverts a portion of the power driving the
shaft 5 . Now shaft 5 is drivingly connected to the shaft 16 through the planetary gear mechanism 12 as follows. The shaft 5 common support units 17 and the planetary gears 29 mesh the ring gear 18 fixed and immobilized . Therefore,
these planetary gears 18 that revolve and toothed , driving its
associated gear 14 which in turn drives shaft 16 , according to the gear
ratio ( increased velocity) of the gear set 12.The resulting rotation of the shaft 16 is also transmitted to the sun gear 15 with which the planets 30 mesh . They rotate with the carrier 17 and rotated according to the rotation axis 16 , so that ring gear 19 is rotated . No power or torque is transmitted through this branch , except for minimum idle losses . Therefore, it can be seen that the two clutches must not be energized simultaneously.The clutch 10 is relieved so that the motor 9 is driven through the flexible coupling 8 shaft 16. Furthermore, the device is being driven in the auxiliary shaft 26. The speed of shaft 16 is constant as the speed of the main motor.The
second state or mode to be considered is a low speed, as needed , for
example, for maneuvering the ship through narrow waters . The main engine is assumed to run on a low speed accordingly in particular is also constant . In
this case, the clutch 21 is pulled to connect the ring gear 19 of the
stage 13 to the box 22 , while the clutch 20 is released . Therefore,
the axes 16 and 5 are also interconnected in this way, but the two sets
of gears 12 and 13 have different transmission ratios so that today the
speed ratio is different from its value in one mode . Accordingly,
the transmission ratio increases and since the shaft 5 rotates at a
lower speed , the shaft 16 rotates at the same speed in one mode . Idle Gear September 12 , the clutch 10 is being disconnected and the motor 11 are being detained.The
third state or mode assumes that the main engine has stopped and a
clutch ( not shown) that the engine is disconnected from the
transmission 1. Moreover, motor 11 starts and clutch 10 is activated to drive generator 9 and the shaft 16 through the coupling member 8 . Clutch 21 activates and deactivates the clutch 20 . Accordingly,
idle gear assembly 12 and the torque and power is transmitted through
the gear set 13 of the shaft 16 in the shaft 5 . Reducing the speed is relatively large so that the shaft 5 rotates relatively slowly . The propeller shaft 2 is now driven through the gears 4 and 3 . The auxiliary equipment in the shaft 26 is driven at the speed of shaft 16.It
is conceivable , from a general standpoint , another way is possible as
far as regards unit 7 , in which the clutch 20 is energized and 21 is
de-energized, while the engine 11 runs . This imparting high speed on the propeller shaft 2 may not be possible due to the nominal power. However,
if a clutch is disconnected , for example, gears 4 shaft 5, a secondary
user that require high speed can be driven in this case.The fourth state and how to stop the ship calls . Both
clutches 20 and 21 are released and turned off, but the engine 11 is
executed to drive the generator 9 and the shaft 16 for operation of the
auxiliary equipment in the shaft 26. The two sun gears 14 and 15 embodiment, but the axis 5 is , in fact, in the hands of helix immobilized . Therefore,
the carrier 17 is at rest and the rotation of planetary gears but no
revolving drive their respective crowns , that start , since the
clutches 20 and 21 do not connect either of them to the stationary case
22.The
invention is not limited to the embodiments described above but all
changes and modifications thereof not constituting departures from the
spirit and scope of the invention are intended to be included.DESCRIPTION OF THE DRAWINGS
While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention , it is believed that the invention , objects and features of the invention and other objects, features and advantages thereof will be better understood from the following description taken in connection with the accompanying drawings in which:. Figure 1 is a schematic view of a transmission system for a vessel which includes the controlled transmission of the invention;. Figure 2 is a cross section through the controlled transmission taken by itself .
Background of the Invention
The present invention relates to a two-stage gear shifting apparatus , and particularly for example, for transmissions in drive systems for ships.It is generally known to branch the power supply from the main engine of a ship for the purposes of conducting secondary users. These secondary users , however, depends on the main engine rpm starts to have and run at any moment . In some cases, this is not of importance . For example, a water pump as a secondary user , the supply of cooling water for the engine , actually less water can be pumped when the engine operates at a lower speed . However, the situation is very different in other cases , such as an alternating current generator that must function at a constant rpm . Devices are known to cause such a generator to be driven at a constant speed even though the first movement speed varies significantly. However, the equipment required here is quite complex and expensive , especially if the transfer of power to the generator is quite high .The last issue to be considered in greater detail . For normal cruising speed of a ship, in fact, and you can expect their diesel engines to operate at a speed that is sufficiently constant for the direct operation of a ac generator. In other words, relatively little is involved normally to run the engine of the ship at a constant chord, which is desirable from the point of view of the ship propulsion anyway. However, when the ship maneuvers through narrow waters , for example, in port the engine speed is often considerably reduced, for example, third, for safety reasons . Thus , one transmission will now overlaps again increase the actual speed being applied to the generator. In other words , there is a need for a transmission to be brought , if the engine speed decreases .
DESCRIPTION OF THE INVENTION
It is an object of the present invention is to provide a new and improved controlled transmission for use in a boat drive system , which allows in particular driving a generator from the main engine of the ship , despite the latter can operate at different speeds.According to the preferred embodiment of the invention, a controlled transmission is suggested having a stationary case which lead two axes. The box contains two planetary gear sets different transmission ratios . The two sun gears are connected to a shaft and supports planetary gears are connected to the other shaft , the carriers are preferably of uniform construction . The two ring gears are selectively connectable to the housing by means of clutches, one by one (or none ), the other idle accordingly. Power is transmitted through the planetary gearing crown wheel which is held in the case , and the gear ratio is determined accordingly.In regard to the application to a ship drive system , high-speed shaft can be connected to a generator and the low speed shaft is connected to the main transmission gear , which is driven by the main engine of the ship , and power is taken for the propeller shaft . An auxiliary motor can be selectively connectable to the high speed shaft through a clutch pressure medium drive . The system of the invention includes provisions for supplying pressure medium to clutch it is quite difficult to achieve.Such a system allows the generator to be operated at constant speed regardless of whether or not the main motor is running at high or low speed , or if the energy is taken from the auxiliary motor in place.
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