CN202091187U - High-and-low-pressure dual-gear pump - Google Patents
High-and-low-pressure dual-gear pump Download PDFInfo
- Publication number
- CN202091187U CN202091187U CN2011201665108U CN201120166510U CN202091187U CN 202091187 U CN202091187 U CN 202091187U CN 2011201665108 U CN2011201665108 U CN 2011201665108U CN 201120166510 U CN201120166510 U CN 201120166510U CN 202091187 U CN202091187 U CN 202091187U
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- Prior art keywords
- gear pump
- low
- pressure gear
- pressure
- low pressure
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- Expired - Fee Related
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- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
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Abstract
The utility model relates to a high-and-low-pressure dual-gear pump, which comprises a high-pressure gear pump, a low-pressure gear pump, a one-way valve and an overflow valve. The high-and-low-pressure dual-gear pump is characterized in that the low-pressure gear pump is arranged at the rear end of the high-pressure gear pump, the rear end of the high-pressure gear pump is connected with the front end of the low-pressure gear pump, the one-way valve is disposed above the middle of the low-pressure gear pump, the overflow valve is arranged at the rear end of the low-pressure gear pump, the rear end of the low-pressure gear pump is connected with the front end of the overflow valve, one end of the low-pressure gear pump is connected with the high-pressure gear pump, the other end of the low-pressure gear pump is connected with the overflow valve, and the high-pressure gear pump is connected with the overflow valve via the low-pressure gear pump. The high-and-low-pressure dual-gear pump has the advantages that the high-and-low-pressure dual-gear pump is simple in structure and low in cost, can realize high and low pressure output without a speed regulating motor, simplifies oil circuits, and reduces faults of a hydraulic system due to leakage of pipelines.
Description
Technical field
The utility model relates to construction machinery industry, and a kind of specifically high low pressure duplex gear pump is applied to machine industries such as rubbish packer, wood-split machine, clamping mechanism, crimping machine, seaming machine and metal forming machine.
Background technique
When motor speed was constant, the flow of common duplex gear pump output did not change in the prior art, can not realize the variation of hydraulic system speed according to the hydraulic system demand; When load changed in the hydraulic system, the pressure of two pumps changed synchronously in the common duplex gear pump, may cause the suction sky of duplex gear pump inlet port like this.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of high low pressure duplex gear pump is provided, the technological scheme that its technical problem that solves the utility model adopts is: structure of the present utility model comprises high-pressure gear pump, low pressure gear pump, one-way valve, relief valve, it is characterized in that the high-pressure gear pump rear end is provided with low pressure gear pump, the high-pressure gear pump rear end is connected with the low pressure gear pump front end, the low pressure gear pump middle upper part is provided with one-way valve, the low pressure gear pump rear end is provided with relief valve, the low pressure gear pump rear end is connected with the relief valve front end, low pressure gear pump one end is connected with high-pressure gear pump, the low pressure gear pump the other end is connected with relief valve, and high-pressure gear pump links together by low pressure gear pump and relief valve.
Working principle and operation instruction: the utility model provides a kind of actual demand during according to hydraulic work system, single pump output during high pressure low speed, the high low pressure duplex gear pump of double pump output when low pressure is quick.Described duplex gear pump has a special integrated valve, and it is a kind of assembly parts that the set of Hydraulic power units and control unit is formed, and has simplified oil circuit like this, has reduced hydraulic system because the fault that the pipeline leakage causes.When system is subjected to hang down load (pressure is lower than the setting of relief valve), one-way valve is opened, and high-pressure gear pump and low pressure gear pump be fuel feeding simultaneously, and output flow is big, and hydraulic system realizes fast feed or rollback; When system is subjected to high capacity (pressure is higher than the setting of relief valve), closed check valve, the high-pressure gear POF, the flow of low pressure gear pump output returns the filler opening of duplex gear pump through the relief valve off-load, thereby has avoided the duplex gear pump inlet port to inhale empty situation.By special integrated valve is installed on the back pump of duplex gear pump, realizes pump output high pressure, low pressure, and when the output high pressure, can improve the oil absorption of pump.This duplex pump is fit to be applied to hydraulic unit driver when hanging down load, and the worker advances or rollback fast; When high capacity, the hydraulic system of energy low speed feeding.
The beneficial effects of the utility model are, the utility model is simple in structure, cost is low, and need not practical speed-adjustable motor and can realize high low pressure output, and simplify oil circuit, have reduced hydraulic system because the fault that the pipeline leakage causes.
Description of drawings
Fig. 1: the utility model embodiment and integrated valve modular construction schematic representation;
Fig. 2: the utility model embodiment hydraulic system theory structure schematic representation;
Fig. 3: the utility model embodiment integrated valve structural representation;
Among the figure: high-pressure gear pump 1, low pressure gear pump 2, one-way valve 3, relief valve 4.
Embodiment
With reference to description of drawings the utility model is done following concrete detailed description; As shown in drawings, structure of the present utility model comprises high-pressure gear pump 1, low pressure gear pump 2, one-way valve 3, relief valve 4, it is characterized in that high-pressure gear pump 1 rear end is provided with low pressure gear pump 2, high-pressure gear pump 1 rear end is connected with low pressure gear pump 2 front ends, low pressure gear pump 2 middle upper parts are provided with one-way valve 3, low pressure gear pump 2 rear ends are provided with relief valve 4, low pressure gear pump 2 rear ends are connected with relief valve 4 front ends, low pressure gear pump 2 one ends are connected with high-pressure gear pump 1, low pressure gear pump 2 the other ends are connected with relief valve 4, and high-pressure gear pump 1 links together by low pressure gear pump 2 and relief valve 4.
Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and scope are limited; under the prerequisite that does not break away from the utility model design concept; common engineers and technicians make the technical solution of the utility model in related domain various modification and improvement; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.
Claims (1)
1. high low pressure duplex gear pump, comprise high-pressure gear pump (1), low pressure gear pump (2), one-way valve (3), relief valve (4), it is characterized in that high-pressure gear pump (1) rear end is provided with low pressure gear pump (2), high-pressure gear pump (1) rear end is connected with low pressure gear pump (2) front end, low pressure gear pump (2) middle upper part is provided with one-way valve (3), low pressure gear pump (2) rear end is provided with relief valve (4), low pressure gear pump (2) rear end is connected with relief valve (4) front end, low pressure gear pump (2) one ends are connected with high-pressure gear pump (1), low pressure gear pump (2) the other end is connected with relief valve (4), and high-pressure gear pump (1) links together by low pressure gear pump (2) and relief valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201665108U CN202091187U (en) | 2011-05-24 | 2011-05-24 | High-and-low-pressure dual-gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201665108U CN202091187U (en) | 2011-05-24 | 2011-05-24 | High-and-low-pressure dual-gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202091187U true CN202091187U (en) | 2011-12-28 |
Family
ID=45366256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201665108U Expired - Fee Related CN202091187U (en) | 2011-05-24 | 2011-05-24 | High-and-low-pressure dual-gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202091187U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194349A (en) * | 2017-12-28 | 2018-06-22 | 赛克思液压科技股份有限公司 | A kind of gear pump for reducing power attenuation |
-
2011
- 2011-05-24 CN CN2011201665108U patent/CN202091187U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194349A (en) * | 2017-12-28 | 2018-06-22 | 赛克思液压科技股份有限公司 | A kind of gear pump for reducing power attenuation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20140524 |