CN105443465A - Constant pressure variable pump unit - Google Patents
Constant pressure variable pump unit Download PDFInfo
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- CN105443465A CN105443465A CN201510879562.2A CN201510879562A CN105443465A CN 105443465 A CN105443465 A CN 105443465A CN 201510879562 A CN201510879562 A CN 201510879562A CN 105443465 A CN105443465 A CN 105443465A
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- pump
- oil
- constant pressure
- pressure variable
- main pump
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Abstract
The invention provides a constant pressure variable pump unit. The constant pressure variable pump unit can solve the problem that an existing constant pressure variable pump set is large in number of oil pumps, high in setting cost and complex in oil way. The constant pressure variable pump unit comprises a main pump and a motor, and the output end of the motor is in shaft connection with the main pump; the constant pressure variable pump unit is characterized in that an auxiliary pump is further arranged, the output end of the motor is in shaft connection with the main pump and the auxiliary pump in series sequentially, the auxiliary pump is provided with two oil suction ports including the first oil suction port and the second oil suction port, the first oil suction port is connected with a hydraulic oil tank oil outlet through an oil pipe, the second oil suction port is connected with an oil release port of the main pump through the oil pipe, and a high-pressure oil port of the auxiliary pump is connected with a cooler.
Description
Technical field
The present invention relates to hydraulic control device field, be specially constant pressure variable displacement pump unit.
Background technique
The oil sources of common constant pressure variable displacement pump composition because main pump exports without flow substantially when constant-pressure variable, therefore needs increase low pressure pump in oil sources to force to allow the fluid in fuel tank flow, thus reaches the effect of reduction oil temperature; But its quantity that there is pump is many, greatly, and there is oil circuit complexity, control the problem that difficulty is large, system failure rate is high in equipment configuration cost.
Summary of the invention
For the problems referred to above, the invention provides constant pressure variable displacement pump unit, it can solve the problem that existing constant pressure variable displacement pump group oil pump quantity is many, setup cost is high, oil circuit is complicated.
Its technological scheme is such, it comprises main pump, motor, described motor output end and described main pump are coupling, it is characterized in that: it is also provided with auxiliary pump, described motor output end is connected successively with described main pump, auxiliary pump and is coupling, described auxiliary pump is provided with two inlet ports, is respectively the first inlet port and the second inlet port, described first inlet port is connected by oil pipe with hydraulic oil container oil outlet, described second inlet port is connected by oil pipe with between the drain tap of described main pump, and the high pressure hydraulic fluid port of described auxiliary pump connects cooler.
The beneficial effect of constant pressure variable displacement pump unit of the present invention is: it is by arranging the auxiliary pump be coupling of connecting with motor output shaft, main pump, ensure that auxiliary pump is synchronoused working with main pump all the time, and auxiliary pump is connected with hydraulic oil container, main pump drain tap respectively by two inlet ports arranged, and by the high pressure hydraulic fluid port of auxiliary pump is connected with cooler, the size, the auxiliary pump that realize the hydraulic pressure oil mass in no matter main pump can come to cooler input hydraulic pressure oil with constant hydraulic pressure oil mass, thus ensure stable efficiency.
Accompanying drawing explanation
Fig. 1 is constant pressure variable displacement pump modular construction schematic diagram of the present invention.
Description of reference numerals: 1, main pump; 2, motor; 3, auxiliary pump; 4, oil pipe; 5, main pump oil outlet; 6, auxiliary pump high-pressure oil outlet; 7, first inlet port; 8, second inlet port; 9, main pump drain tap.
Embodiment
See Fig. 1, constant pressure variable displacement pump unit of the present invention, it comprises main pump 1, motor 2, auxiliary pump 3, motor 2 output terminal motor output end, main pump 1, auxiliary pump 3 are connected successively and are coupling, auxiliary pump 3 is provided with two inlet ports, be respectively the first inlet port and 7 second inlet port 8, first inlet ports 7 are connected by oil pipe with hydraulic oil container oil outlet, and the first inlet port 7 is not shown in FIG, be connected by oil pipe 4 between second inlet port 8 and the drain tap 9 of main pump 1, the high-pressure oil outlet 6 of auxiliary pump 3 connects cooler.
When many group constant pressure variable displacement pump unit are in parallel, the high-pressure oil outlet of the auxiliary pump of each constant voltage alter pump unit is connected to cooler respectively, and the hydraulic oil got by the high-pressure oil outlet of each auxiliary pump all inputs in cooler and cools; When many group constant pressure variable displacement pump unit are arranged in parallel, the quantity of opening constant pressure variable displacement pump unit is selected according to the power consumption of forcing required for cooling, thus reach energy-conservation effect, and owing to eliminating for forcing the low pressure pump cooled, because this reducing equipment configuration cost, simplifying oil circuit, and rate of fault is also reduced greatly.
Claims (1)
1. constant pressure variable displacement pump unit, it comprises main pump, motor, described motor output end and described main pump are coupling, it is characterized in that: it is also provided with auxiliary pump, described motor output end is connected successively with described main pump, auxiliary pump and is coupling, described auxiliary pump is provided with two inlet ports, is respectively the first inlet port and the second inlet port, described first inlet port is connected by oil pipe with hydraulic oil container oil outlet, described second inlet port is connected by oil pipe with between the drain tap of described main pump, and the high pressure hydraulic fluid port of described auxiliary pump connects cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510879562.2A CN105443465A (en) | 2015-12-05 | 2015-12-05 | Constant pressure variable pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510879562.2A CN105443465A (en) | 2015-12-05 | 2015-12-05 | Constant pressure variable pump unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105443465A true CN105443465A (en) | 2016-03-30 |
Family
ID=55554008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510879562.2A Pending CN105443465A (en) | 2015-12-05 | 2015-12-05 | Constant pressure variable pump unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105443465A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2625657Y (en) * | 2003-07-10 | 2004-07-14 | 白城通业有限责任公司 | Hydraulic pressure stepless speed regulating device |
| CN101722828A (en) * | 2010-01-29 | 2010-06-09 | 哈尔滨工业大学 | Driving system of wheel-drive type hydrostatic transmission hybrid vehicle |
| CN202493528U (en) * | 2012-03-30 | 2012-10-17 | 杨奉钦 | Concrete pump hydraulic cooling device |
| CN205190383U (en) * | 2015-12-05 | 2016-04-27 | 无锡市海航电液伺服***股份有限公司 | Constant voltage variable pump unit |
-
2015
- 2015-12-05 CN CN201510879562.2A patent/CN105443465A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2625657Y (en) * | 2003-07-10 | 2004-07-14 | 白城通业有限责任公司 | Hydraulic pressure stepless speed regulating device |
| CN101722828A (en) * | 2010-01-29 | 2010-06-09 | 哈尔滨工业大学 | Driving system of wheel-drive type hydrostatic transmission hybrid vehicle |
| CN202493528U (en) * | 2012-03-30 | 2012-10-17 | 杨奉钦 | Concrete pump hydraulic cooling device |
| CN205190383U (en) * | 2015-12-05 | 2016-04-27 | 无锡市海航电液伺服***股份有限公司 | Constant voltage variable pump unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160330 |