CN214499588U - Gear pump control asymmetric cylinder closed hydraulic system - Google Patents
Gear pump control asymmetric cylinder closed hydraulic system Download PDFInfo
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- CN214499588U CN214499588U CN202120478167.4U CN202120478167U CN214499588U CN 214499588 U CN214499588 U CN 214499588U CN 202120478167 U CN202120478167 U CN 202120478167U CN 214499588 U CN214499588 U CN 214499588U
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Abstract
The utility model discloses an asymmetric jar closed hydraulic system of gear pump accuse, include gear cluster pump and the energy storage ware that constitutes by hydraulic pump I and hydraulic pump II, the oil-out of hydraulic pump I and the rodless chamber intercommunication of pneumatic cylinder, the oil inlet of hydraulic pump I is connected with the oil inlet of hydraulic pump II, the oil-out of hydraulic pump II and the pole chamber intercommunication that has of pneumatic cylinder, the liquid outlet of energy storage ware and the inlet of hydraulic pump I and the inlet of hydraulic pump II communicate, the discharge capacity of hydraulic pump I is greater than the discharge capacity of hydraulic pump II. The utility model discloses a low-cost ordinary hydraulic pressure gear cluster pump constitutes asymmetric oil source, solves the flow matching problem of the asymmetric jar of pump accuse to realize that system's flow matches, have that technical cost is low, control mode is simple, simple structure, characteristics of dependable performance.
Description
Technical Field
The utility model relates to the field of hydraulic technology, in particular to asymmetric jar closed hydraulic system of gear pump accuse.
Background
The hydraulic actuator has obvious advantages in the aspect of linear power output, and particularly, the asymmetric hydraulic cylinder has wide application in the industrial fields of machine tools, metallurgy, engineering machinery, ships, aviation, water conservancy and hydropower and the like due to compact structure. The hydraulic cylinder is directly controlled by the hydraulic pump, which is a high-efficiency and energy-saving electro-hydraulic control technology, and can effectively solve the problems of throttling loss, heating, high installed power and the like caused by a valve-controlled hydraulic cylinder. The action areas of the two working chambers of the asymmetric hydraulic cylinder are different, so that the flow demand is asymmetric when the hydraulic cylinder extends and retracts. At present, a symmetrical pump, namely an asymmetrical hydraulic cylinder with equal two-way output flow of a hydraulic pump, is generally adopted in engineering, the energy loss is large due to the fact that the two flows are not matched, and the working characteristics of a system are directly influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a gear pump accuse asymmetric jar closed hydraulic system, this test hydraulic system have solved the flow matching problem of asymmetric pneumatic cylinder.
The utility model discloses an asymmetric jar closed hydraulic system of gear pump accuse, include the gear cluster pump and the energy storage ware that constitute by hydraulic pump I and hydraulic pump II, the oil-out of hydraulic pump I and the rodless chamber intercommunication of pneumatic cylinder, the oil inlet of hydraulic pump I is connected with the oil inlet of hydraulic pump II, the oil-out of hydraulic pump II and the pole chamber intercommunication that has of pneumatic cylinder, the liquid outlet of energy storage ware and the inlet of hydraulic pump I and the inlet of hydraulic pump II intercommunication, the discharge capacity of hydraulic pump I is greater than the discharge capacity of hydraulic pump II.
Further, still include the oil supplementing subassembly, the liquid outlet of oil supplementing subassembly passes through one-way intercommunication of check valve I with the inlet of hydraulic pump I and hydraulic pump II, check valve I makes fluid from the oil supplementing subassembly to hydraulic pump I and hydraulic pump II side one-way flow.
Furthermore, mend the oil subassembly and include oil supplementing pump and oil tank, oil feed end of oil supplementing pump is used for the interior fluid of suction oil tank, oil output end of oil supplementing pump is through one-way intercommunication of check valve I and hydraulic pump I and II inlets of hydraulic pump.
Furthermore, overflow valves are arranged on a hydraulic path communicated with the rodless cavity and a hydraulic path communicated with the rod cavity on the hydraulic cylinder.
Furthermore, a hydraulic path between a liquid outlet of the hydraulic pump I and a rodless cavity of the hydraulic cylinder forms a pressure side I, hydraulic pressure between a liquid outlet of the hydraulic pump II and a rod cavity of the hydraulic cylinder forms a pressure side II according to the path, the pressure side I is communicated with the pressure side II in a one-way mode through an overflow valve I, and the pressure side II is communicated with the pressure side I in a one-way mode through an overflow valve II.
Further, a liquid outlet of the oil supplementing pump is connected with an oil supplementing overflow valve, and a liquid outlet end of the oil supplementing overflow valve is connected into the oil tank.
Further, the liquid outlet of the oil replenishing pump is connected with the pressure side I in a one-way mode.
Further, the liquid outlet of the oil supplementing pump is connected with the pressure side II in a one-way mode.
Furthermore, the liquid inlet of the hydraulic pump I is connected with the oil tank in a one-way mode.
The utility model has the advantages that:
the utility model adopts the common hydraulic gear pump with low cost to form the asymmetric oil source, solves the flow matching problem of the pump control asymmetric cylinder, thereby realizing the flow matching of the system, and has the characteristics of low technical cost, simple control mode, simple structure and reliable performance; the utility model discloses at first the liquid outlet pressure through the oil supplementing overflow valve control oil supplementing pump at the in-process that flows, then through the pressure of the whole hydraulic circuit of overflow valve II control of overflow valve I and, this dual overflow structure guarantees hydraulic circuit system's stability.
Drawings
The invention is further described with reference to the following figures and examples.
FIG. 1 is a schematic view of a hydraulic system of the present invention;
FIG. 2 is a schematic view of the structure of the hydraulic cylinder in an extended working state;
FIG. 3 is a schematic view of the structure of the hydraulic cylinder in a shortened operating state;
Detailed Description
As shown in the figure, asymmetric jar closed hydraulic system of gear pump accuse in this embodiment includes gear train pump and energy storage ware 3 that constitute by hydraulic pump I1 and hydraulic pump II 2, the oil-out of hydraulic pump I1 and the rodless chamber intercommunication of pneumatic cylinder 12, the oil inlet of hydraulic pump I1 is connected with the oil inlet of hydraulic pump II 2, the oil-out of hydraulic pump II 2 and the pole chamber intercommunication that has of pneumatic cylinder, the liquid outlet of energy storage ware and the inlet of hydraulic pump I1 and the inlet of hydraulic pump II 2 communicate, the discharge capacity of hydraulic pump I1 is greater than the discharge capacity of hydraulic pump II 2.
The hydraulic pump I1 and the hydraulic pump II 2 are both bidirectional gear pumps, a liquid inlet of the hydraulic pump I feeds liquid and a liquid outlet of the hydraulic pump I discharges liquid in forward rotation, a liquid outlet of the hydraulic pump I feeds liquid and a liquid outlet of the hydraulic pump I discharges liquid in reverse rotation, the functions of the liquid inlet and the liquid outlet are switched at the moment, and the hydraulic pump II is the same; the hydraulic pump I is a large-displacement right-handed gear pump, the hydraulic pump II is a small-displacement left-handed gear pump, the hydraulic pump I and the hydraulic pump II are connected in series on the same shaft and driven by a main motor 13, when the main motor rotates forwards, a liquid inlet of the hydraulic pump I1 is filled with liquid, a liquid outlet of the hydraulic pump I1 is filled with liquid, a liquid inlet of the hydraulic pump II is filled with liquid, a liquid outlet of the hydraulic pump II is filled with liquid, and when the main motor rotates backwards, the liquid inlet and the liquid outlet of the hydraulic pump I1 and the liquid inlet and the liquid outlet of the hydraulic pump II 2 are mutually switched; referring to fig. 1, a liquid outlet of a hydraulic pump I1 is connected with a rodless cavity of a hydraulic cylinder through a pipeline I14, a liquid outlet of a hydraulic pump II 2 is connected with a rod cavity of the hydraulic cylinder through a pipeline II 15, and a liquid inlet of the hydraulic pump I1 is connected with a liquid inlet of the hydraulic pump II 2 through a pipeline III 16; the liquid outlet of the energy accumulator is communicated with the pipeline III 16 through a pipeline, the liquid outlet of the energy accumulator is used as a liquid inlet function during energy storage and also used as a liquid outlet function during energy discharge, and as shown in the attached drawing, the energy accumulator is of a tank-shaped structure, an isolation piston is arranged in each energy accumulator, the energy accumulator is of an existing structure, and existing equipment can be purchased, which is not specifically described; when the rod body of the hydraulic cylinder extends out, the main motor 13 rotates forwards, the hydraulic pump I1 is driven to rotate, oil in the hydraulic pump I1 enters a rodless cavity of the hydraulic cylinder through an oil outlet, and a piston is pushed to move, so that the volume of the rod cavity is reduced, the oil in the rod cavity is discharged and enters a liquid outlet of the hydraulic pump II 2 to be discharged through a liquid inlet of the hydraulic pump II 2, the oil discharged by the hydraulic pump II 2 enters a liquid inlet of the hydraulic pump I1, the volume change of the rodless cavity of the hydraulic cylinder is larger than the volume change of the rod cavity, so that the oil quantity required by the hydraulic pump I1 is larger than the oil quantity supplied by the hydraulic pump II 2, the oil in the energy accumulator is supplemented to the hydraulic pump II 2 at the moment, and the difference flow is supplemented by the energy accumulator; when the rod body of the hydraulic cylinder retracts, the main motor 13 rotates reversely, the hydraulic pump II 2 is driven to rotate, oil in the hydraulic pump II 2 enters a rod cavity of the hydraulic cylinder through an oil outlet and pushes a piston to move, so that the volume of the rod-free cavity is reduced, the oil in the rod-free cavity is discharged and enters a liquid outlet of the hydraulic pump I1 to be discharged through a liquid inlet of the hydraulic pump I1, the oil discharged by the hydraulic pump I1 enters a liquid inlet of the hydraulic pump II 2, the volume change of the rod-free cavity of the hydraulic cylinder is larger than the volume change of the rod cavity, so that the oil amount required by the hydraulic pump II 2 is smaller than the oil amount supplied by the hydraulic pump I1, at the moment, part of the oil enters an energy accumulator, and the differential flow enters the energy accumulator for supplement; the structure adopts a low-cost common hydraulic gear train pump to form an asymmetric oil source, solves the flow matching problem of a pump-controlled asymmetric cylinder, realizes system flow matching, and has the characteristics of low technical cost, simple structure and reliable performance.
In this embodiment, still include the oil supplementing subassembly, the liquid outlet of oil supplementing subassembly and the inlet of hydraulic pump I1 and hydraulic pump II 2 pass through check valve I9 one-way intercommunication, check valve I makes fluid from the oil supplementing subassembly to hydraulic pump I1 and hydraulic pump II 2 side one-way flow. As shown in the combined figure 1, an oil outlet of the oil supplementing assembly is connected with a pipeline III 16 through a pipeline IV 17, a one-way valve I9 is installed on the pipeline IV 17, and oil is supplemented into a hydraulic pump I1 and a hydraulic pump II 2 through the oil supplementing assembly.
In this embodiment, the oil supply subassembly includes oil supply pump 4 and oil tank 5, oil feed end of oil supply pump is used for the interior fluid of absorption oil tank, oil output end of oil supply pump passes through check valve I and hydraulic pump I1 and hydraulic pump II 2 inlet one-way intercommunication. The oil supplementing pump 4 is driven by an oil supplementing motor 18 to rotate, and the motor drives the oil supplementing pump to rotate and inject oil in an oil tank into the liquid inlets of the hydraulic pump I1 and the hydraulic pump II 2 to supplement the flow at the liquid inlets.
In this embodiment, overflow valves are provided on both the hydraulic path communicating with the rodless chamber and the hydraulic path communicating with the rod chamber on the hydraulic cylinder. When the hydraulic cylinder extends and shortens, the hydraulic path communicated with the rodless cavity and the rod cavity is alternately used as a high-pressure side, and the overflow valve is used for controlling the high-pressure side hydraulic pressure of the whole hydraulic circuit, so that the high-pressure side hydraulic pressure is kept in a stable range and is a system safety valve of the whole hydraulic system.
In this embodiment, the hydraulic pressure route between I1 liquid outlet of hydraulic pump and the pneumatic cylinder rodless chamber forms pressure side I, hydraulic pressure that II 2 liquid outlets of hydraulic pump and pneumatic cylinder have between the pole chamber forms pressure side II according to the route, through overflow valve I6 one-way intercommunication between pressure side I and the pressure side II, through overflow valve II 7 one-way intercommunication between pressure side II and the pressure side I. As shown in the combined drawing 1, a pipeline I14 is a pressure side I, a pipeline II 15 is a pressure side II, when the rod body of the hydraulic cylinder extends, the pressure side I is a high-pressure side, when the rod body is shortened, the pressure side II is the high-pressure side, an overflow valve I6 enables oil on the pressure side I to flow to the pressure side II, the overflow effect is exerted on the pressure side I, an overflow valve II 7 enables oil on the pressure side II to flow to the pressure side I, and the overflow effect is exerted on the pressure side II.
In this embodiment, a liquid outlet of the oil supply pump is connected with an oil supply overflow valve 8, and a liquid outlet end of the oil supply overflow valve is connected to the inside of the oil tank. When the pressure at the liquid outlet end of the oil supplementing pump is too high, the pressure is relieved through the oil supplementing overflow valve, the fact that the pressure at the side of the liquid outlet of the oil supplementing pump keeps a constant range can be guaranteed, the stability of the system is improved, the set pressure of the oil supplementing overflow valve is slightly smaller than the set pressure of the overflow valves I6 and II 7, as shown in the combined drawing 1, the liquid inlet end of the oil supplementing overflow valve is close to the side of the oil supplementing pump, the pressure of the liquid outlet of the oil supplementing pump is controlled through the oil supplementing overflow valve firstly in the flowing process, then the pressure of the whole hydraulic circuit is controlled through the overflow valves I6 and II 7, and the stability of the hydraulic circuit system is guaranteed through the double overflow structure.
In this embodiment, the liquid outlet of the oil replenishment pump 4 is connected with the pressure side I in a one-way manner. As shown in the combined drawing 1, the pipeline III 16 is in one-way connection with the pipeline I14 through the check valve II 10, so that oil in the pipeline III 16 flows in a one-way mode into the pipeline I14, the oil in the oil supplementing pump flows in the pipeline I14 in a one-way mode, the oil supplementing pump can be used for directly supplementing the oil in the pipeline I14, and the pipeline suction empty when the pipeline I14 is used as a low-pressure side can be prevented.
In this embodiment, the liquid outlet of the oil replenishment pump 4 is connected with the pressure side ii in a one-way manner. As shown in the combined drawing 1, the pipeline III 16 is in one-way connection with the pipeline II 15 through the one-way valve III 11, so that oil in the pipeline III 16 flows in one way into the pipeline II 15, the oil in the oil supplementing pump flows in one way into the pipeline II 15, the oil supplementing pump can be used for directly supplementing the oil in the pipeline II 15, and the pipeline suction emptying when the pipeline II 15 is used as a low-pressure side can be prevented.
In this embodiment, the liquid inlet of the hydraulic pump I1 is connected with the oil tank in a one-way mode. As shown in the combined figure 3, a back pressure valve 19 is arranged on a path between a liquid inlet of the hydraulic pump I1 and the oil tank, the back pressure valve enables oil at the liquid inlet of the hydraulic pump I1 to flow in a one-way mode only to the side of the oil tank, when a rod body of the hydraulic cylinder is shortened, one part of the oil discharged from the liquid inlet of the hydraulic pump I1 is supplied to the hydraulic pump II 2, the other part of the oil is supplied to the energy accumulator 3, and the other part of the oil flows back to the oil tank through the back pressure valve.
Referring to fig. 2, when the rod body of the hydraulic cylinder extends out, the main motor 13 drives the hydraulic pump i 1 to normally work, and the hydraulic pump ii 2 rotates reversely; high-pressure oil output by the hydraulic pump I1 enters a rodless cavity of the hydraulic cylinder through a pipeline I14 to push a piston rod to extend out; meanwhile, oil discharged from a rod cavity of the hydraulic cylinder enters a hydraulic pump II through a pipeline II 15, and oil reversely discharged from the hydraulic pump II enters a liquid inlet of a hydraulic pump I1; because the flow is asymmetric, the flow fed back to the oil suction pipeline by the hydraulic pump II is less than the oil suction flow required by the hydraulic pump I, and the difference flow is provided by the oil supplementing pump 4 and the energy accumulator 3;
referring to fig. 3, when the rod body of the hydraulic cylinder needs to be retracted, the main motor 13 rotates reversely, the hydraulic pump ii 2 works normally, and the hydraulic pump i 1 rotates reversely. And high-pressure oil output by the hydraulic pump II 2 enters a rod cavity of the hydraulic cylinder through a pipeline II 15 to push the piston to retract. Simultaneously, the no pole chamber of pneumatic cylinder discharge fluid gets into hydraulic pump I1 through pipeline I14 in, the fluid of I1 reverse exhaust of hydraulic pump gets into the inlet of hydraulic pump II 2. Because the flow is asymmetric, the flow fed back to the oil suction pipeline by the hydraulic pump I1 is larger than the oil suction flow required by the hydraulic pump II 2, one part of the redundant flow is supplemented into the energy accumulator 3, and the other part of the redundant flow is discharged back to the oil tank by the backpressure valve 17.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (9)
1. The utility model provides a gear pump accuse asymmetric jar closed hydraulic system which characterized in that: including the gear cluster pump and the energy storage ware that constitute by hydraulic pump I and hydraulic pump II, the oil-out of hydraulic pump I and the no pole chamber intercommunication of pneumatic cylinder, the oil inlet of hydraulic pump I is connected with the oil inlet of hydraulic pump II, the oil-out of hydraulic pump II and the pole chamber intercommunication that has of pneumatic cylinder, the liquid outlet of energy storage ware and the inlet of hydraulic pump I and the inlet intercommunication of hydraulic pump II, the discharge capacity of hydraulic pump I is greater than the discharge capacity of hydraulic pump II.
2. The gear pump controlled asymmetric cylinder closed hydraulic system according to claim 1, characterized in that: still include the oil supplementing subassembly, the liquid outlet of oil supplementing subassembly passes through one-way intercommunication of check valve I with the inlet of hydraulic pump I and hydraulic pump II.
3. The gear pump controlled asymmetric cylinder closed hydraulic system according to claim 2, characterized in that: the oil supplementing assembly comprises an oil supplementing pump and an oil tank, the oil inlet end of the oil supplementing pump is used for sucking oil in the oil tank, and the oil outlet end of the oil supplementing pump is communicated with the liquid inlets of the hydraulic pump I and the hydraulic pump II in a one-way mode through a one-way valve I.
4. The gear pump controlled asymmetric cylinder closed hydraulic system according to claim 3, characterized in that: overflow valves are arranged on a hydraulic path communicated with the rodless cavity and a hydraulic path communicated with the rod cavity on the hydraulic cylinder.
5. The gear pump controlled asymmetric cylinder closed hydraulic system according to claim 4, characterized in that: a hydraulic path between a liquid outlet of the hydraulic pump I and a rodless cavity of the hydraulic cylinder forms a pressure side I, hydraulic pressure between a liquid outlet of the hydraulic pump II and a rod cavity of the hydraulic cylinder forms a pressure side II according to the path, the pressure side I is communicated with the pressure side II in a one-way mode through an overflow valve I, and the pressure side II is communicated with the pressure side I in a one-way mode through an overflow valve II.
6. The gear pump controlled asymmetric cylinder closed hydraulic system according to claim 4, characterized in that: and the liquid outlet of the oil supplementing pump is connected with an oil supplementing overflow valve, and the liquid outlet end of the oil supplementing overflow valve is connected into the oil tank.
7. The gear pump controlled asymmetric cylinder closed hydraulic system according to claim 5, characterized in that: and the liquid outlet of the oil replenishing pump is connected with the pressure side I in a one-way mode.
8. The gear pump controlled asymmetric cylinder closed hydraulic system according to claim 7, characterized in that: and the liquid outlet of the oil replenishing pump is connected with the pressure side II in a one-way mode.
9. The gear pump controlled asymmetric cylinder closed hydraulic system according to claim 3, characterized in that: the liquid inlet of the hydraulic pump I is connected with the oil tank in a one-way mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120478167.4U CN214499588U (en) | 2021-03-05 | 2021-03-05 | Gear pump control asymmetric cylinder closed hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120478167.4U CN214499588U (en) | 2021-03-05 | 2021-03-05 | Gear pump control asymmetric cylinder closed hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214499588U true CN214499588U (en) | 2021-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120478167.4U Expired - Fee Related CN214499588U (en) | 2021-03-05 | 2021-03-05 | Gear pump control asymmetric cylinder closed hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214499588U (en) |
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2021
- 2021-03-05 CN CN202120478167.4U patent/CN214499588U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211026 |
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| CF01 | Termination of patent right due to non-payment of annual fee |