ES2250787T3 - CELL PUMP OF PALLETS. - Google Patents

Abstract

Cellular vane pump to produce a flow of a pressure medium to a consumer, especially a power steering of a motor vehicle, with the following characteristics: - the cell vane pump has two working chambers (9); - the working chambers (9) have two input chambers (10 or 11) to form a suction side of the pump and two output chambers (12 or 13) to form a discharge side of the pump; - the inlet chambers (10, 11) can be supplied with a pressure medium through a suction connection and the pressure medium flows can be conducted from the exit chambers (12; 13) to a discharge enclosure or a main supply pipe (14) that can be connected with the consumer, characterized by the following features: - the main supply pipe (14) has a regulating diaphragm (27) and can be connected to the suction side (1 ) of the pump through a bypass pipe (28); - a flow regulating piston (29) is integrated in the branch pipe (28) which is operatively connected to the regulating diaphragm (27); - the bypass pipe (28) has a bypass injector (33); - a first outlet chamber (12) is operatively connected with an electric valve (16); - the first outlet chamber (12) can be connected to the suction side (1) of the pump or the discharge enclosure or the main discharge pipe (14); - a mixing device (20) is integrated in a return pipe (24); - a check valve (19) is arranged between the outlet chambers (12, 13) and the main supply pipe (14).

Description

Vane cell pump.

The invention concerns a cellular pump of vanes to produce a flow of a pressure medium towards a consumer according to the preamble of claim 1.

A vane cell pump of the exposed genus It is known from DE 41 36 150 A1.

The vane cell pump of the exposed genre it has a cam ring mounted on a housing thereof solidarity way in rotation. Inside the cam ring is arranged a rotor that has several grooves that are oriented substantially in radial direction outwards. In the slits are guided in a mobile way vanes whose movement during a rotation of the rotor is controlled by the inner contour of the cam ring Between the cam ring, the rotor and the sides front of laterally applied housing parts are Work chambers formed. The work chambers present paths of aspiration and discharge. In each of the two aspiration zones an inlet chamber is arranged and in each one of the two drive zones is arranged a chamber of exit. The two flows of the pressure medium from the two output cameras are connected in parallel to low numbers of pump and series revolutions at higher numbers of pump revolutions by means of a regulating valve flow equipped with three pairs of control edges.

The pump known from DE 41 36 150 A1 is used, for example, for a power steering of a vehicle car. To adapt very different speed numbers from the drive motor to the pressure medium demand of the consumer, such vane cell pumps are equipped with a flow regulation valve. It is intended to achieve so that the liquid flow to the power steering at a high number of pump revolutions correspond to the liquid flow at a low pump speed

Since the speed revolutions in Vacuum of a vehicle engine are very low, the volume of displacement of the vane cell pump has to be chosen with a corresponding magnitude to ensure the flow demand consumer minimum The consequence of this is that at high engine speed is circulated without use a correspondingly high transport flow, which worsens the total performance of the installation.

The aforementioned document describes a cellular vane pump in which the pressure medium flows coming from the two output chambers are connected in series to high speed Disadvantageously, the structure of the vane cell pump with the flow regulating valve Special is relatively complicated. In addition, you get a actuation of the flow regulating valve only when apply a corresponding resistance to the choke site. TO for this purpose, a high volumetric flow must be transported which it requires a corresponding power and that originates a production of unwanted heat.

With the aforementioned document, a advantageous regulation of power and exact regulation of Volumetric flow rate.

They are known for the rest of the state of the art two-vane cell pumps, but these in general are not regulated or have a bypass regulation, such as occurs in documents EP 1 318 304 A, WO 01/53701 A and EP 0 522 505 A. Cell vane pumps are also known in which a side of the vanes is shorted. However the performance of these vane cell pumps is lower and the volumetric flow regulation towards a consumer is still more inaccurate than in the case of the vane cell pump gender indicated, which has already proposed improvements for this.

Known vane cell pumps they almost always carry a high volume that is driven against a strangulation or against a resistance and that may eventually be returned through a flow regulating valve and a bypass pipe. Losses then become directly in temperature and clearly heat the circuit of pressure medium This necessitates the use of corresponding refrigerators whose size increases proportionally with the pressures. Since particularly in the automotive sector is increasingly needed hydraulic power, increase power losses resulting from the paddle cell pumps known so far, which are manifest directly in fuel consumption.

The present invention is based on the problem of create a cell vane pump that avoids the disadvantages before cited of the prior art, in particular, clearly improve the performance at high speed and make possible with a Compact and economical form of construction a simple regulation of the power and an exact regulation of the volumetric flow towards a consumer

This problem is solved with the characterizing features of claim 1.

However the flow of the pressure medium coming from a first exit chamber can be fed directly to the suction side of the pump through a electric valve (said flow is shorted), it can be achieve an advantageous power regulation. Electric valve It can be controlled easily with the help of the number of revolutions of the pump and / or the steering torque and / or the angle of address and / or other parameters that produce savings of Energy.

The control of the electromagnetic valve by mean pump speed, steering angle and the steering torque is advantageous, since this can be done in also the magnitude of the deviation and the angle of address. At an average number of pump revolutions and with a small directional movement a smaller volume of the pressure medium flow, while at the same number of pump revolutions a strong deviation of the wheels of the vehicle requires a high volume of pressure medium flow. A control of this class with the help of different parameters, in where no limitation to the even parameters of direction and direction movement, can be materialized in a way advantageous with an electric valve.

With the solution according to the invention it is possible also control the cell vane pump regardless of number of revolutions thereof or as a complement to the number of revolutions of the pump, take into account the torque of direction, the angle of direction or a desire for direction. By Therefore, the magnitude of the desired deviation can be taken into account of the wheels of the vehicle. Relevant data can be obtained or easily calculated from the angle signal of address, for example the ZSP signal. As you have checked the inventor, a steering movement in more than 90% is not necessary of walking situations. That is, regardless of pump speed can be short-circuited in this case a first exit chamber, that is the medium flow of pressure can be transported by returning directly to the side of pump suction, since the power steering does not need any pressure medium flow to control the wheels of the vehicle.

In known vane cell pumps so far it has also been carried out at high speed of the pump, for reasons of shoring forces transverse, a transport of fluid from both exit chambers to the discharge enclosure or to the discharge pipe principal. When disconnecting an output camera it has split, to high pump speed, from the consideration of that the shoring of the transverse forces is followed performing only on one side (through a working chamber) and, therefore, damages, displacements or the like of the paddle cell pump. The inventor has now recognized that he is not necessary shoring of transverse forces by means of of a request for bilateral pressure from the working chambers (or of the output chambers) when a pair of address. However, this applies in 90% of cases. By Therefore, the first output chamber can be disconnected without problems energetically favorable under the control of the valve electric depending on the steering torque, the steering angle or A desire for driver guidance.

In an advantageous embodiment it is possible Also configure the output cameras asymmetrically. May be provided in this case that the smallest output chamber transport permanently and, therefore, guarantee transport minimum, especially when a steering torque is not applied. By therefore, the large output chamber represents the first chamber of output controlled by the electric valve. For example, when applying a corresponding steering torque or in maneuvering processes with small pump speed, the output chamber Large can be connected by electric valve.

By using an electric valve the volume of the pressure medium flow can be clearly reduced to be transported to a consumer due to the direct return of the flow of the pressure medium from the first chamber of output, so that power losses are minimized. By therefore, the production of hot.

The electric valve optimizes the performance of the cell vane pump and makes possible a construction mode Compact and cheap

The energy advantages provided by the solution according to the invention substantially result from being transports a smaller volumetric flow rate through the system. As the volumetric flow rate decreases, a lower idle pressure. In general, the pressure of idling, that is, the pressure in the system to the number of pump idle speed, originates through the measuring diaphragm, the diaphragm in the expandable flexible tube, the direction valve (acts as a diaphragm), the diaphragm of return, oil cooler and return filter. Whether Pump regulation flow decreases, pressure decreases idling and, therefore, the power absorption of the bomb.

In addition, it is energetically advantageous that the volumetric flow of the disconnected side does not flow through the control throttling or measurement diaphragm. It results from this also a lower idle pressure. Another reason for The energy advantages of the solution according to the invention resides in that the pump flow cross sections are in general very small. Due to the control of the pressure medium flow according to the invention and the additional channels are produced minor resistance to flow.

The electric valve may present substantially two connection positions, transporting fluid in a connection position towards the drive enclosure through of a check valve and the pressure medium flowing in the another connection position, without pressure, to the suction side of the bomb. With a view to a compact form of construction, it is especially important here that the pressure medium is conducted by the shortest path to the suction side of the pump and form an injector together with the suction connection or a suction fitting The use of the electric valve makes advantageously possible that switching between positions of connection can be made by means of arbitrary parameters. In addition, very short connection times can be realized without that a "pressure of Connection".

The electric valve makes possible a form of especially simple and compact construction, since they don't have to mounted pressure medium or similar transport pipes for Check the electric valve.

It is advantageous that the electric valve is Built as an electromagnetic valve with a connection of Opening close.

Through a configuration like valve electromagnetic with substantially two connection positions are can realize the solution according to the invention in a way Especially simple and cheap.

It is advantageous that the flow of the pressure medium coming from the first exit chamber can be fed to the discharge enclosure or to the main supply line through of a check valve in a closed connection position of the electric valve and directly to the suction side of the pump or suction connection in a connection position of opening of the electric valve.

The connection position of Electric valve closure apply to low numbers of pump revolutions or, similarly to this, to large pairs of direction, large direction movements or other parameters of this class. The opening connection position, in which short-circuits the flow of the pressure medium of the first chamber of pressure or it is fed directly to the suction side of The pump is preferably applied at high speed of the pump or when no steering torque is applied or only apply a small pair of address or when no steering movement or only a small movement of address.

According to the invention, it may be provided that the flow of the pressure medium from the first chamber of output, returned or shorted in a connection position of opening of the electric valve, can be injected into the flow of the pressure means of the suction connection by means of a mixer configured as injector.

The energy that comes with the flow of the medium of shorted or returned pressure can thus be used to recharge the flow of the pressure medium from the rush of aspiration. The injector formed by the suction connection and the mixer causes the flow of the returned pressure medium to be optimally fed to the suction side of the pump, without hinder the influx of the pressure medium from outside. Result from this other energy advantages for the cellular pump of pallets

In a constructive embodiment of the invention it can also be provided that the electric valve is integrated in a pump cover.

It has been proven in trials that you can thus materialize a particularly simple construction form and compact In addition, the channels and drills already existing in this area They can be used to connect the electric valve. Other advantage is that serial components can be used known and favorable.

According to the invention, it can also be provided that the check valve is arranged on a faceplate and preferably constructed as a membrane valve.

A check valve arrangement in a front plate, by which the cameras are limited frontally working of the vane cell pump, has also proven to be especially advantageous with respect to a form of construction simple and compact Canals and drills can be used now existing on the faceplate. It has been proven that it is especially suitable a check valve configuration in the form of a membrane valve.

Other executions and advantageous improvements of the invention follow from the other claims subordinates and the execution example set forth below in their Start with the help of drawing.

Show

Figure 1, a hydraulic diagram of the pump paddle cell according to the invention;

Figure 2, a representation of the principle of a cross section through the vane cell pump according to the invention;

Figure 3, a flow chart volumetric / number of revolutions and a pressure / number diagram of revolutions according to the state of the art; Y

Figure 4, a flow chart volumetric / number of revolutions and a pressure / number diagram of revolutions of the vane cell pump according to the invention.

The structure of a cell vane pump is basically known, for example by document DE 41 36 150 A1. For this reason, they are described in detail below only the characteristics necessary for the invention.

As can be seen in figure 1, the pump paddle cell presents a suction side 1 with a suction connection 2 and a supply side 3 leading to a consumer not represented in detail. The vane cell pump it is especially suitable for the supply of a Power steering of a motor vehicle.

In a pump housing not represented by reasons for greater clarity is hosted (as can be seen in Figure 2) a drive shaft 4 that is connected to a rotor 5 located on it. The rotor 5 has slits radially arranged 6 in which vanes 7 are guided in scrollable shape In this case, they may be provided, by example, eight pallets 7.

The vanes 7 or the rotor 5 are embraced by a cam ring 8 that is attached to the pump housing of a Safe way against rotation. Between the peripheral surface cylindrical rotor 5 and elliptical bore of cam ring 8 se they find two work chambers 9. Work chambers 9 are configured here in general in the form of a sickle. The volume of transport results from the largest possible sickle segment between two vanes 7 and the width of the rotor 5 or vanes 7. In the example of execution represented the work chambers 9 are of the same size. However, in one embodiment of the invention it may be also provided that the work chambers 9 present a asymmetric configuration and therefore a camera of I work 9 large and another small.

As can be seen in figure 2, each camera Working 9 has an input camera 10 or 11 and a camera output 12 or 13. Pressure medium flows from the chambers 12, 13 can be driven to a drive enclosure known and not represented in the drawing for reasons of greater clarity or to a main supply pipe 14 that goes to the consumer.

The cell vane pump has a channel of oil 15 located behind the vanes that is attached to the side of pump 3 or with the drive enclosure through channels 15a, 15b or holes and slots shown only in representation of principle. The function of the oil channel 15 located behind the pallets is sufficiently known and therefore reason, it is not described in detail below.

As depicted in Figure 1 and Figure 2, the flow of the pressure medium from the first chamber of output 12 is controllable by means of an electric valve 16 which it is preferably integrated in a cover not shown in the bomb. The pressure medium flow can be controlled with help of certain values, such as the number of pump revolutions, a steering torque, an angle of direction or in general a desire for direction, such that the pressure medium flow is fed (shorted) to discharge enclosure or to main discharge pipe 14 or to suction side 1 of the pump. With the help of the number of pump revolutions can be easily verified magnitude of the available volume of one or both output chambers 12, 13. Using the values "steering torque" and "angle of address "you can check if you want a deviation from the wheels of the vehicle and what should be the magnitude of the volume of the pressure medium in the main supply pipe 14 or in the drive enclosure. Depending on these values or executions simple also based on individual values (for example, only the pump speed) can be performed thus the control of the electric valve 16 such that the first outlet chamber 12 feed the flow of the pressure medium directly to the suction side 1 of the pump or to the enclosure of drive or to main drive pipe 14. To control the electric valve 16 can also be used other parameters that are suitable for energy saving.

As shown in Figure 2, the valve electrical 16 may be constructed with a connection of opening / closing and presenting a piston 17. Preferably, the electric valve 16 is configured as a valve electromagnetic The electric valve 16 also has a spring 18. Electric valves with a connection of opening / closing are sufficiently known, so it is not go into more details about the different forms of execution possible. In the execution example, the flow of the pressure medium from the first outlet chamber 12 can be fed to the discharge enclosure or the discharge pipe main 14 in a closed valve connection position electric 16 through a check valve 19. The valve retention 19 may be advantageously arranged on a plate front that limits working cameras 9 on the front side. The check valve 19 may preferably be constructed as a membrane valve

Check valve 19 prevents flow from the pressure medium, exit the second working chamber 13 and from the drive enclosure or main drive line 14.

In the example of execution it is foreseen that the pressure medium flow from the first exit chamber 12 can be fed directly to the suction side 1 of the pump or suction connection 2 in a connection position opening of the electric valve 16.

The flow of the returned pressure medium or shorted from the first output chamber 12 is injected into the pressure medium flow of the rush of suction 2 by means of a mixer 20. The mixer is configured here as an injector 20.

As can be seen in Figure 2, the cameras input 10, 11 are supplied with a flow of the pressure medium through two pipes 21 of said chambers. By turning the rotor 5 (in the direction of the arrow) this means of transporting pressure from the inlet chambers 10, 11 to the chambers of outlet 12, 13. The pressure medium is discharged from the second outlet chamber 13 in an outlet pipe 22 not controlled in direction to the main supply pipe 14. The flow of the medium pressure from the first outlet chamber 12 is discharged into a controlled outlet pipe 23 that forks in address to the electric valve 16. When the electric valve 16 is closed (as shown in figure 2), the flow of the medium pressure then passes from the controlled outlet pipe 23 to the main supply pipe 14 through the valve check 19. When electric valve 16 is open, the flow of the pressure medium circulates from the first outlet chamber 12 or from the controlled outlet pipe 23 to the suction side 1 of the pump. In this case, check valve 19 prevents the flow of the pressure medium from the second outlet chamber 13 or of the main supply pipe 14 returning to the side of pump suction 1.

The flow of the pressure medium from the first outlet chamber 12 circulates towards the injector 20 through a return line 24 after leaving the electric valve 16. By means of the injector 20, the flow of the medium of pressure of the first outlet chamber 12 in a medium flow of pressure from pipe 25 of an oil container 26.

This results in the energy advantages already mentioned, since the energy or medium flow pressure of returned pressure is used for the recharge process of the paddle cell pump.

In the main supply pipe 14 which leads to the consumer a regulation diaphragm 27 is arranged which corresponds to a flow regulating piston 29 for control a branch pipe 28. The branch pipe 28 must return a flow of excess pressure medium to the side of pump suction 1. It ensures that a consumer arrives constantly regulated pressure medium flow.

It is especially advantageous that, by increasing the number of revolutions of the pump, can be materialized by of the electric valve 16 or the flow regulating piston 29 a straight or downward evolutionary flow of the pressure medium flow towards the consumer

Especially when the consumer consists of a power steering, a descending evolutionary course is convenient of the flow of pressure medium to the consumer, since at a higher pump speed travel speed it is also correspondingly higher, so that a higher steering resistance improves driving dynamics and feeling marching.

The flow regulating piston 29 is configured such that said flow regulating piston 29 open bypass pipe 28 only from a pressure predetermined The pressure that keeps the piston closed flow regulation 29 is established in this case by means of a spring 30 of said flow regulating piston and a pipe of flow regulation 31. Flow regulation pipe 31 is requested with the pressure of the pressure medium that goes to the consumer. The pressure that opens the flow regulating piston 29 is applied by the main supply pipe 14 or else a pressure difference across the regulating diaphragm 27, the reduced pressure acting on the side with the spring 30 of the pressure regulating piston. By increasing the volumetric flow rate, the pressure difference increases and the bypass pipe is opened 28.

The bypass pipe 28 forms an injector of bypass 33 together with a suction pipe 32 in which eventually the pressure medium has been injected before from the return pipe 24. The bypass pipe 28 it can be introduced, for example as a mixer, into the pipe of aspiration 32.

In case of an execution form alternatively an asymmetric configuration of the 9 work cameras, it seems convenient to control the camera work 9 major, that is, the output chamber 12 major, by means of the electric valve 16.

As depicted in the execution example, the working chambers 9 of the vane cell pump can be supplied with pressure medium through a suction side 1 common pump. However, in forms of execution alternatives may also be provided that the work chambers 9 be supplied with pressure medium by two suction sides 1 separated from the pump.

Figures 3a and 3b show a diagram of the volumetric flow depending on the number of revolutions and a system pressure diagram based on the number of revolutions for a conventional vane cell pump according to the state of the art In comparison with this, figures 4a and 4b show a volumetric flow chart based on the number of revolutions and a diagram of the system pressure depending on the number of revolutions for the vane cell pump according to the invention. n_ {L} here designates the number of running revolutions empty As can be seen from the comparison of figures 3a and 3b with figures 4a and 4b, the pressure in the system to the number of pump idle speed, the so-called pressure of idling, it is noticeably smaller in the cell pump of vanes according to the invention that in vane cell pumps conventional. In conventional vane cell pumps, to preserve the deviation capacity of the wheels of the vehicle, is already transported at this number of revolutions of the pump, even during idling of said pump, a flow volumetric which is sufficient for this (V_ {norm}). An increase in the pressure in the system or a volumetric flow rate that is too large is prevented here from this number of revolutions by means of the regulating diaphragm 27 that controls the bypass pipe 28. However, conventional vane cell pumps have to guarantee the number of idle speeds at volumetric flow for normal operation V_ {norm} (en say, fast directional movements have to be possible). He volumetric flow rate for normal operation (V_ {norm}) is represented by the horizontal line in diagrams 3a and 4a.

Figure 3a shows that the volumetric flow rate that carries the conventional vane cell pump is substantially proportional to the number of revolutions. The bomb conventional pallet cell is designed for it in such so that the volumetric flow rate (V_ {norm}) necessary for the normal operation is reached at the number of revolutions of idle running n_ {L} of the conventional vane cell pump. Of course, the volumetric flow carried by the pump paddle cell continues to increase when the number of revolutions, but is prevented by means of the diaphragm of regulation 27 an increase in volumetric flow sent to the Power steering A situation similar to this follows from the diagram shown in figure 3b, in which the pressure of the system increases proportionally to the number of revolutions or the volumetric flow rate, until it reaches the number of idle speed n_ {L} of the cellular pump conventional vanes, be limited by the regulation diaphragm 27 in the direction of the consumer.

In contrast to this, it can be seen from the diagram in Figure 4a that the volumetric flow rate transported by the cell vane pump according to the invention becomes clearly smaller than the number of idle revolutions n_ {L} of the cell vane pump . As a consequence, the pressure of the system shown in Figure 4b is also clearly smaller. Figure 4a shows two lines that ascend proportionally to the number of revolutions, the flattest line representing the transport of the volumetric flow from only one exit chamber 13 (the unregulated exit chamber), while the line that ascends with a steep slope shows the volumetric flow generated by the cell vane pump in the direction of the consumer when the first outlet chamber is connected, that is, the controlled exit chamber 12. As shown in Figure 4a, the volumetric flow rate V_ {norm} necessary for Normal operation is applied in the idle speed zone n_ {L} when both output chambers 12, 13 transport fluid in the direction of the consumer, that is, the first output chamber 12 is not short-circuited. However, in general, that is to say, in approximately 90% of all driving situations, the wheels of the vehicle are not turned, so that the first output chamber 12 can be disconnected and thus the smallest volumetric flow represented is represented. by means of the flat line with the resulting pressure (figure 4b). As can be seen from Figures 4a and 4b, the volumetric flow rate V_ {norm} necessary for normal operation or the corresponding pressure (corresponding to the idle pressure according to Figure 3b) is applied to substantially higher revs. only when the first output chamber 12 is short-circuited. For an identical size of the working chamber 9 or the first output chamber 12 and the second output chamber 13, the volumetric flow rate V_ {norm} necessary for operation Normal is reached only at a number of revolutions of the pump that corresponds to double the number of revolutions of idling of the pump. In the case of an asymmetric configuration of the work chambers 9 or the output chambers 12, 13, this value can be varied at will. It is imaginable, for example, a vane cell pump with a transport volume of 11 cm 3 / revolution, in which the uncontrolled working chamber carries 3 cm 3 / revolution and the controlled working chamber transports 8 cm3 / revolution. When starting from a number of idle revolutions of the 730 revolutions vane cell pump, the vane cell pump according to the invention reaches only the volumetric flow rate necessary for the normal operating state at approximately 2660 revolutions and, for Therefore, the corresponding pressure. The full functional capacity of the steering at the idle speed of the vane pump is made possible, if necessary, by the connection of the first working chamber (controlled) 9 or the first output chamber 12 This results in considerable energy advantages that make possible a reduction in fuel consumption of 0.1 to
0.3 l.

The volumetric flow rate V_ {norm} during normal operation can represent, for example, a flow volumetric of 8 l / min. Similarly, the maximum pressure in the system (towards the consumer) can be, for example, 7 bars (horizontal line of figures 3b and 4b).

The idea of the invention can be put into practice generally also in the same way for distributor pumps rotating, especially for cellular roller pumps. In consequently, the described vane cell pump can represent also a cellular roller pump.

Reference List

one

Side pump suction

2

Suction connection

3

Side pump drive

4

Tree drive

5

Rotor

6

Slits

7

Pallets

8

Ring Of cam

9

Working chambers

10

First input camera

eleven

Second input chamber

12

First exit chamber

13

Second exit chamber

14

Main drive pipe

fifteen

Channel of oil located behind the vanes

15th

Channel to the oil channel located behind the paddles

15b

Channel to the oil channel located behind the paddles

16

Electric valve

17

Piston

18

Dock

19

Retention valve

twenty

Mixer, injector

twenty-one

Chamber pipe entry

22

Outlet Pipe (no controlled)

2. 3

Outlet pipe (controlled)

24

Return pipe

25

Container Pipe oil

26

Oil container

27

Regulation diaphragm

28

Bypass pipe

29

Flow regulation piston

30

Piston spring regulating flow

31

Piston pipe regulating flow

32

Suction pipe

33

Bypass injector.

Claims (14)

1. Cell vane pump to produce a flow of a pressure medium to a consumer, especially a power steering of a motor vehicle, with the characteristics following:

-

the paddle cell pump features two work chambers (9);

-

the Work chambers (9) have two input chambers (10 or 11) to form a suction side of the pump and two chambers of output (12 or 13) to form a drive side of the bomb;

-

the cameras can be supplied inlet (10, 11) with a pressure means through a rush of suction and can be conducted the flows of the medium of pressure from the outlet chambers (12; 13) to an enclosure of drive or a main drive pipe (14) that can be attached with the consumer,

characterized by the following particularities:

-

the main supply pipe (14) has a diaphragm of regulation (27) and can be connected to the suction side (1) of the pump through a bypass pipe (28);

-

in the bypass pipe (28) is integrated a regulating piston of flow (29) that is operatively attached to the diaphragm of regulation (27);

-

the bypass pipe (28) features a bypass injector (33);

-

a first output chamber (12) is operatively linked with a electric valve (16);

-

the First exit chamber (12) can be attached to the side of suction (1) of the pump or the discharge enclosure or the piping main drive (14);

-

in a return pipe (24) a mixing device is integrated (twenty);

-

between the outlet chambers (12, 13) and the main discharge pipe (14) a check valve (19) is arranged.

2. A cellular vane pump according to claim 1, characterized in that the electric valve (16) is constructed as an electromagnetic valve with an opening / closing connection. 3. Cell vane pump according to claim 1 or 2, characterized in that the number of revolutions of the pump and / or a steering torque and / or a steering angle and / or can be used to control the electric valve (16) other parameters that are suitable for saving energy. 4. A cell vane pump according to claim 1, 2 or 3, characterized in that the flow of the pressure medium from the first outlet chamber (12), in a closed connection position of the electric valve (16), can be fed to the discharge enclosure or the main supply line (14) through a check valve (19). 5. A cell vane pump according to one of claims 1 to 4, characterized in that the flow of the pressure medium from the first outlet chamber (12), in an opening connection position of the electric valve (16), can be fed directly to the suction side (1) of the pump or to the suction connection (2). 6. A vane cell pump according to claim 4 or 5, characterized in that the check valve (19) prevents the flow of the pressure medium from the second outlet chamber (13) and from the discharge enclosure or the pipeline. main drive (14). 7. A vane cell pump according to one of claims 1 to 6, characterized in that the flow of returned or short-circuited pressure medium from the first outlet chamber (12) can be injected into the flow of the pressure medium of the supply connection. suction (2) by means of a mixer (20). 8. A cellular vane pump according to claim 7, characterized in that the mixer is constructed as an injector (20). 9. A vane cell pump according to claim 1, characterized in that the flow regulating piston (29) or the regulating diaphragm (27) regulates a flow of bypass pressure medium such that a medium flow reaches the consumer of constant regulated pressure. 10. A vane cell pump according to claim 1 or 9, characterized in that it can be realized by means of the flow regulating piston (29) and / or the electric valve (16), at an increasing number of pump revolutions, one course evolutionary straight or descending flow of pressure medium to the consumer. 11. A vane cell pump according to claim 9 or 10, characterized in that the flow of bypass pressure medium can be fed to the flow of pressure medium to the inlet chambers (10, 11) by means of a second mixer configured as a bypass injector (33). 12. A vane cell pump according to one of claims 1 to 11, characterized in that the electric valve (16) is integrated in a pump cover. 13. A vane cell pump according to one of claims 4 to 12, characterized in that the check valve (19) is arranged on a faceplate and preferably configured as a membrane valve. 14. A vane cell pump according to one of claims 4 to 13, characterized in that the working chambers (9) are of asymmetrical configuration and the larger working chamber (9) or the larger outlet chamber (12) is controllable by means of the electric valve (16).