DE10352254B3 - Pendulum displacement machine for feed applications has pressure chambers adjacent bearing for outer rotor of rotor set within control slider acting as fluid cushion opposing applied external forces - Google Patents

Abstract

The pendulum displacement machine has a machine housing (1) enclosing a control slider (2) within which the outer rotor (4) of a rotor set is supported, the inner rotor (6) mounted on a rotary drive shaft (5) and an odd number of at least 5 pendulation spokes (7) coupling the inner and outer rotors. A pair of pressure chambers (20) are provided in the control slider in the vicinity of the bearing for the outer rotor for providing a fluid cushion opposing applied external forces.

Description

The The invention relates to a means of eccentric orbital motion working pendulum slider machine with the one on the drive shaft The pendulum machine applied torque by means of an eccentric Orbital motion a conveying effect can be achieved.

In the prior art, different pump designs are described above. That's how it describes DE 44 21 255 C1 a filler-less internal gear pump whose race is slidably mounted in a housing, wherein in the housing, in a portion of the outer periphery, a centrally located not the entire width overlapping, trough-shaped, acted upon by delivery pressure recess is used in the operating state of the formation of a hydrostatic bearing.

In addition, in the prior art in the FR 980 766 as well as in the DE 195 32 703 C1 Pendulum slider machines described above.

at These pendulum slide machines are types with a rotatably mounted inner rotor and a Pendelmitnehmer driven, also rotatably mounted outer rotor, in which the flow by the variation of the eccentricity between the inner rotor and the outer rotor can be varied.

The with their respective circular head portion pivotally in the pans the rotatably mounted outer rotor arranged symmetrically constructed pendulum driver are with their conical, opposite the head area Ends slidably disposed in the grooves of the inner rotor. In these Designs will be the synchronous running between the eccentric running Inner rotor opposite the Outer rotor over the Game between the inner rotor and the sliding in its grooves arranged pendulum guaranteed.

In Connection with the rotatable mounting of the outer rotor occur in all these Designs high friction losses, which from the rotatably mounted on outer ring engaging, the rotational movement generating "pendulum driver forces" result and a high wear of the Storage of the outer rotor and also the life of the pendulum slide machines significantly reduce.

Also in the DE 101 02 531 A1 presented solution (as well as the priority of the DE 101 02 531 A1 claiming EP 1 225 337 A2 ) a variable-volume cell pump with unbalanced pendulum drivers also has high friction losses and high wear of the bearing of the outer rotor, which in turn results in limitations in efficiency and in life.

The The object of the invention is now one by means of an eccentric Recirculating motion working to develop pendulum pusher machine eliminates these aforementioned disadvantages of the prior art, especially at high reliability, the friction losses minimized in all speed ranges, also the required drive power significantly reduced, at the same time the efficiency of the controllable Pendulum pushers significantly increased, beyond the running characteristics significantly improved, the maintenance costs significantly reduced and extends the life considerably even under extreme conditions of use.

According to the invention, this object is achieved by a pendulum slide machine with a housing (in 1 ) arranged spool ( 2 ), in which rotatably the outer rotor ( 4 ) at least one rotor set is slidably mounted, which consists of a on a drive shaft ( 5 ) arranged inner rotor ( 6 ), which is characterized by an odd number of pendulum webs ( 7 ) (at least five) with the outer rotor ( 4 ), wherein in the working area of the pendulum webs ( 7 ) in the housing interior and / or in the housing cover ( 27 ), each offset by 180 °, on the one hand each a suction kidney ( 18 ) and on the other hand one print kidney each ( 19 ), wherein this controllable pendulum slide machine is characterized in that in the region of the sliding bearing of the outer rotor ( 4 ) in the control slide ( 2 ), near the pressure kidney (s) ( 19 ), the direction of action of the resultant of the forces inherent in the system during operation, two with the Druckniere / n ( 19 ) connected pressure chambers ( 20 ) are arranged, between the two pressure chambers ( 20 ) a footbridge ( 21 ) is arranged.

These two pressure chambers ( 20 ) form in the control slide ( 2 ) on the circumference of the outer rotor ( 4 ) a pressure side connected hydraulic bearing.

The between the pressure chambers ( 20 ) arranged web ( 21 ) is used in occurring irregularities in the pressure build-up in the pressure chambers ( 20 ), for example during the running-in phase or during a speed change, the outer rotor ( 4 ) as an abutment and prevents inadvertent displacement of the outer rotor ( 4 ) in the spool ( 2 ), so that a jamming of the outer rotor ( 4 ) in the control slide ( 2 ) is completely excluded.

It is also characteristic that the two by a bridge ( 21 ) separate pressure chambers ( 20 ) may have the same size or different sizes, so that the respective designs are optimally used for a variety of operating speeds.

The invention according to the invention on the circumference of the outer rotor ( 4 ) in the form of the two pressure chambers ( 20 ) arranged on the pressure side connected hydraulic bearings in the spool ( 2 ) in conjunction with the bridge ( 21 ), that with high reliability, the friction losses are substantially minimized in all speed ranges, so that the required drive power could be reduced by about 10% to 15% and the efficiency of the adjustable pendulum slide machines could be significantly increased.

The inventive arrangement of the pressure side connected hydraulic bearing on the circumference of the outer rotor ( 4 ) causes at the same time a significant improvement in the running properties, since the solution according to the invention, which occurs in the operating state, on the sliding bearing of the outer rotor ( 4 ) acting forces by means of the constructed by the hydraulic bearing "fluid cushion" on the outer rotor ( 4 ) floats are buffered.

It is characterized by the inventive arrangement of the large, the entire bearing width overlapping pressure chambers ( 20 ) ensures that all of the system in the operating state inherent, acting from the inside out forces from the "fluid cushion" are almost completely compensated.

simultaneously on the one hand the maintenance costs are noticeably reduced, and on the other hand, the life becomes even under extreme conditions of use significantly extended.

It is also essential to the invention that the control slide ( 2 ) with a control slide arm ( 30 ), and that in the housing interior next to the spool ( 2 ) on the one hand a working space ( 26 ) and, opposite this, on the other hand, a control pressure chamber ( 25 ) is arranged.

It is also characteristic that on the control slide arm ( 30 ) one in the workroom ( 26 ) arranged on the housing interior supporting the return spring ( 15 ), which in one on the spool ( 30 ) arranged spring guide ( 14 ) is arranged.

It is essential that the in the housing ( 1 ) working space ( 26 ) with the suction kidney (s) ( 18 ) via a working channel ( 31 ) and that on the spool ( 2 ) the working space ( 26 ) opposite in the housing ( 1 ) arranged control pressure space ( 25 ) with a control channel ( 23 ) is provided.

It is also characteristic in this context that on the control slide arm ( 30 ), the pivot bearing ( 3 ), a slide guide radius ( 13 ), which in an associated, arranged in the housing interior housing radius ( 12 ) is slidably mounted. This is in connection with the storage of the spool ( 2 ) in the pivot bearing ( 3 ) ensures that the return spring loaded spool ( 2 ) can be smoothly and accurately swiveled by the slightest pressure changes.

The between the housing radius ( 12 ) and the slide guide radius ( 13 ) formed at the same time an optimal and cost-effective seal between the control pressure chamber ( 25 ) and the workspace ( 26 ).

When pressurizing the control channel ( 23 ) allows this arrangement a simple, inexpensive, reliable and almost optimal controllability of the pendulum pusher machine according to the invention.

For example, in the control pressure chamber ( 25 ) via a pressurized valve, the control pressure can be controlled such that, for example, to Abregeln the pendulum slide machine according to the invention oil via the control channel ( 23 ) the control pressure space ( 25 ), or to increase the delivery volume flow of the oscillating slide valve according to the invention oil via the control channel ( 23 ) from the control pressure chamber ( 25 ) is let out.

As a result of the inventive arrangement of the return spring ( 15 ) can be realized even with the slightest pressure fluctuations, a precisely defined pivoting movement of the spool.

The solution according to the invention also offers the possibility of internal regulation. In this case, the operating pressure applied to the pendulum pusher according to the invention on the pressure side is used directly to Abregel until reaching the respectively desired flow rate flow medium through the control channel ( 23 ) in the control pressure space ( 25 ).

In addition, the solution according to the invention also offers the possibility of indirect control of the Pendelschiebermaschi invention ne. This is realized in that by the inventive, direct connection of the control channel ( 23 ) is ensured with the main channel of the engine that the control medium directly from / in the / the main channel in / from the / control pressure chamber ( 25 ) is supplied / discharged. Thus, the solution of the invention provides a very simple and reliable way even flow losses that occur, for example via the lines, the heat exchanger and / or the / the filter, cost-effective to take into account in the scheme, so that each of the pendulum slide machine according to the invention currently to be delivered capacity is always regulated in dependence and taking into account all these losses.

It is also characteristic that in the working room ( 26 ) an end stop ( 16 ) and in the control pressure chamber ( 25 ) a position limitation ( 17 ) is arranged.

The in the workroom ( 26 ) arranged end stop ( 16 ) as well as those in the control pressure chamber ( 25 ) location limit ( 17 ) serve at respective end position of the spool ( 2 ) an improvement of the duck distribution in the control pressure space ( 25 ) or in the workspace ( 26 ).

Another feature of the invention is that in the control pressure chamber ( 25 ) a pressure distribution groove ( 24 ) is arranged.

This in the workroom ( 26 ) arranged pressure distribution groove ( 24 ) also serves to improve the duck distribution in the control pressure chamber ( 25 Further details and features of the invention emerge from the following description of the exemplary embodiment according to the invention in conjunction with the claims and the two drawings for the solution according to the invention.

following Now, the invention with reference to an embodiment in conjunction closer with 2 figures explained become.

there show the

1 : the pendulum slide machine according to the invention with the housing cover open with the side view of the rotor set;

2 : the pendulum machine according to the invention in a section according to the 1 with closed housing cover.

In the 1 the pendulum slide machine according to the invention is shown with the housing cover open with the side view of the rotor set. The 2 shows the pendulum machine according to the invention in a section according to the 1 with closed housing cover 27 ,

In a housing 1 is like in the 1 shown in a pivot bearing 3 the spool 2 arranged. In this is rotatable the outer rotor 4 a rotor set slidably mounted. The rotor set exists next to the outer rotor 4 from one on a drive shaft 5 arranged inner rotor 6 ,

Both are in an odd number of (at least five) in the present case seven pendulum webs 7 interconnected, These seven pendulum footbridges 7 are with their pendulum heads 9 in evenly over the circumference of the outer rotor 4 distributed pan grooves 8th arranged.

At the same time, the pendulum bars 7 with her pendulum feet 10 sliding in the pendulum guide grooves 11 of the inner rotor 6 arranged.

The individual chamber volumes between each adjacent pendulum webs 7 the outer rotor 4 and the inner rotor 6 formed pump chambers are at each revolution of the drive shaft 5 successively to a maximum and immediately afterwards to a minimum volume (or vice versa) brought.

When increasing the volume of the pump chambers, the medium to be pumped on the in the housing 1 and, as from the 2 visible, also in the housing cover 27 arranged suckers 18 sucked into the pump chambers.

In the direction of rotation of the drive shaft 5 offset by 180 ° at the same time finds a reduction in volume of the pump chambers due to the eccentricity between the inner rotor 6 and the outer rotor 4 instead, so that there the medium over in the housing 1 and, as from the 2 visible, also in the housing cover 27 arranged pressure kidneys 19 exits the pump chambers.

From the 2 is in connection with the 1 it can be seen that in the region of the sliding bearing of the outer rotor 4 in the spool 2 , near the pressure kidney 19 , the direction of action of the resultant of the system in the operating state inherent forces, two via the Pumpenauslaßkanäle 29 and the inflow channels 22 with the print kidney 19 connected pressure chambers 20 are arranged.

Of course, these pressure chambers 20 also directly with the print kidneys 19 be connected.

Between the two pressure chambers 20 is always a jetty 21 arranged. Both pressure chambers 20 form on the circumference of the outer rotor 4 in the spool 2 a pressure side connected hydraulic bearing.

The one between the pressure chambers 20 arranged bridge 21 is used in particular when irregularities occur during pressure buildup in the pressure chambers 20 For example, during the break-in phase or during a speed change, the outer rotor 4 as an abutment and prevents inadvertent displacement of the outer rotor 4 in the spool 2 , so that jamming of the outer rotor 4 in the spool 2 , is completely excluded.

The two by a jetty 21 separated from each other, the entire bearing width übdeckenden pressure chambers .20 have in the embodiment according to 1 shown design different sizes.

The invention according to the circumference of the outer rotor 4 in the form of the two pressure chambers overlying the entire bearing width 20 arranged, connected on the pressure side hydraulic bearings causes in connection with the web 21 that all forces acting from the inside out, the system in operation state inherent forces are almost completely compensated by the liquid cushion, so that with high reliability, the friction losses are substantially minimized in all speed ranges, thereby reducing the required drive power by about 10% to 15% and the efficiency of the adjustable pendulum slide machines is significantly increased.

The inventive arrangement of the pressure side connected hydraulic bearing on the circumference of the outer rotor 4 In addition, at the same time causes a significant improvement in the running characteristics, as occurring by the inventive solution in the operating state, on the sliding bearing of the outer rotor 4 acting forces by means of the constructed by the hydraulic bearing "fluid cushion" on which the outer rotor 4 "Floats", be buffered.

At the same time, the maintenance costs are noticeably reduced and the service life considerably extended even under extreme conditions of use. The spool 2 is like in the 1 shown with a spool arm 30 Mistake. In the interior of the housing 1 is on the one hand next to the spool valve 2 a workroom 26 and on the other hand next to the spool 2 a control pressure chamber 25 arranged.

At the control valve arm 30 engages one in the workroom 26 arranged, resting on the housing interior return spring 15 at.

This is in a on the spool arm 30 arranged spring guide 14 arranged.

The one in the case 1 arranged working space 26 is with the sucklings 18 over the working channel 31 connected.

The at the spool 2 the workroom 26 opposite in the housing interior arranged control pressure chamber 25 is with a control channel 23 Mistake.

The pivot bearing 3 opposite is on the spool arm 30 a slider guide radius 13 arranged, which in an associated, in the interior of the housing 1 arranged housing radius 12 is slidably mounted.

In connection with the storage of the spool valve 2 in the pivot bearing 3 is due to the inventive storage of the spool arm 30 in the interior of the housing 1 ensures that the return spring loaded spool 2 even with the slightest pressure changes in the control pressure chamber 25 can be smoothly and accurately swiveled.

It ensures the between the housing radius 12 and the slider guide radius 13 formed large contact surface at the same time an optimal and cost-effective seal between the control pressure chamber 25 and the workroom 26 ,

This arrangement allows pressurization of the control channel 23 Thus, a simple, inexpensive, reliable and virtually optimal controllability of the pendulum pusher machine according to the invention.

For example, in the control pressure chamber 25 be controlled by a pressurized valve, the control pressure such that, for example, to Abregeln the pendulum slide machine according to the invention oil on the control channel 23 the control pressure chamber 25 supplied, or to increase the delivery volume flow of the pendulum slide machine according to the invention oil via the control channel 23 from the control pressure chamber 25 is let out.

Due to the inventive arrangement of the return spring 15 can be realized even with the slightest pressure fluctuations a precisely defined pivotal movement of the spool.

The solution according to the invention also offers the possibility of internal regulation. It will the operating pressure applied to the pendulum pusher according to the invention on the pressure side is used directly to control the delivery medium through the control channel until the desired delivery volume flow is reached 23 in the control pressure chamber 25 supply.

In addition, the solution according to the invention also offers the possibility of indirect control of the pendulum pusher machine according to the invention. This is due to the inventive, direct connection of the control channel 23 ensured with the main channel, so that the control medium directly from / in the / the main channel in / out of / the control pressure chamber 25 is supplied / removed.

Thereby the solution according to the invention offers a very simple and reliable possibility even flow losses, the example over the pipes, the heat exchanger and / or the filter (s) occur cost-effectively in the scheme, So that the from the pendulum slider machine according to the invention each delivery currently to be provided always in dependence and considering all these losses are regulated.

It is also characteristic that in the work space 26 an end stop 16 and in the control pressure room 25 a location limit 17 is arranged.

The one in the workroom 26 arranged end stop 16 as well as the control pressure chamber 25 arranged position limitation 17 serve at the respective end position of the spool 2 an improvement of the duck distribution in the control pressure chamber 25 or in the workroom 26 ,

Another feature of the invention is that in the control pressure chamber 25 a pressure distribution groove 24 is arranged.

These in the control pressure chamber 25 arranged pressure distribution groove 24 also serves to improve the duck distribution in the control pressure chamber 25 With the aid of the solution according to the invention, it has thus been possible to develop a controllable pendulum slide machine operating by means of an eccentric revolving movement which, with high reliability, minimizes the frictional losses in all rotational speed ranges significantly reduces the required drive power, at the same time significantly increases the efficiency of the adjustable pendulum slide machines, significantly improved the running characteristics, significantly reduced maintenance costs and extended significantly even under extreme conditions, the life, with the embodiment presented in the embodiment also at the same time a simple, cost-effective and reliable, optimal controllability can be guaranteed.

1

casing

2

spool

3

pivot bearing

4

outer rotor

5

drive shaft

6

inner rotor

7

swing bridge

8th

Pfannennuten

9

pendulum head

10

pendulum

11

Pendelführungsnut

12

barrel radius

13

Radius slider guide

14

leadership

15

Return spring

16

end stop

17

position limit

18

suction kidney

19

pressure kidney

20

pressure chamber

21

web

22

inflow

23

control channel

24

Druckverteilungsnut

25

Control pressure chamber

26

working space

27

housing cover

28

Pump inlet channel

29

pump discharge

30

Steuerschieberarm

31

working channel

Claims (6)

Pendulum slider machine with one in a housing ( 1 ) arranged spool ( 2 ) in which rotatably the outer rotor ( 4 ) at least one rotor set is slidably mounted, which consists of a on a drive shaft ( 5 ) arranged inner rotor ( 6 ), which is characterized by an odd number of pendulum webs ( 7 ) (at least five) with the outer rotor ( 4 ), wherein in the working area of the pendulum webs ( 7 ) in the housing interior and / or in the housing cover ( 27 ), each offset by 180 °, on the one hand each a suction kidney ( 18 ) and on the other hand a pressure kidney ( 19 ) is arranged, characterized in that in the region of the sliding bearing of the outer rotor ( 4 ) in the control slide ( 2 ), near the pressure kidney (s) ( 19 ), the direction of action of the resultant of the forces inherent in the system during operation, two with the Druckniere / n ( 19 ), the entire bearing width covering pressure chambers ( 20 ) at ordered between the two pressure chambers ( 20 ) a footbridge ( 21 ) is arranged. Pendulum pusher machine according to claim 1, characterized in that the two by a web ( 21 ) separate pressure chambers ( 20 ) may be the same size or different sizes. Pendulum slider machine according to claim 1, characterized in that the control slide ( 2 ) with a control slide arm ( 30 ) is provided, wherein in the housing interior on the one hand next to the spool ( 2 ) a work space ( 26 ) and, opposite this, on the other hand, a control pressure chamber ( 25 ) is arranged, wherein on the control slide arm ( 30 ) one in the workroom ( 26 ) arranged on the housing ( 1 ) supporting return spring ( 15 ), which in one on the spool ( 30 ) arranged spring guide ( 14 ) is arranged, and wherein in the housing ( 1 ) working space ( 26 ) with the suction kidney (s) ( 18 ) is / are connected and at the control pressure chamber ( 25 ) a control channel ( 23 ) is arranged. Pendulum pusher machine according to claim 3, characterized in that in the working space ( 26 ) an end stop ( 16 ) and in the control pressure chamber ( 25 ) a position limitation ( 17 ) is arranged. Pendulum slider machine according to claim 3, characterized in that in the control pressure chamber ( 25 ) a pressure distribution groove ( 24 ) is arranged. Pendulum slider machine according to claim 3, characterized in that on the control slide arm ( 30 ) a slider guide radius ( 13 ), which in a the Schieberführungsradius ( 13 ) arranged in the housing interior housing radius ( 12 ) is slidably mounted.