CN201582080U - Oblique tray type axial plunger piston variable pump - Google Patents
Oblique tray type axial plunger piston variable pump Download PDFInfo
- Publication number
- CN201582080U CN201582080U CN2010200461518U CN201020046151U CN201582080U CN 201582080 U CN201582080 U CN 201582080U CN 2010200461518 U CN2010200461518 U CN 2010200461518U CN 201020046151 U CN201020046151 U CN 201020046151U CN 201582080 U CN201582080 U CN 201582080U
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- control valve
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Abstract
The utility model relates to a variable pump, in particular to an oblique tray type axial plunger piston variable pump of an open circuit hydraulic transmission system suitable for an excavator and a hydraulic crane. The variable pump comprises an oil distribution disc, a cylinder body, a limit valve and an oblique tray, wherein the oil distribution disc is in spherical contact with the oil distribution surface of the cylinder body, and pump also comprises a group of load sensing valves: a flow control valve, a flow control valve and a power control valve. The pump has compact structure and is operated stably and reliably, and the service life of the pump is obviously prolonged. The pump can correctly respond to the change of the flow pressure requirement, and when the load pressure is lower, the oil pump can provide larger flow and realizes the quick actuation of executive components; and when the load pressure is increased, the oil pump control system makes correct response immediately, and provides necessary flow for maintaining the normal operation of the system via accurate control. The compound pump has basically constant mechanical power, low power loss, and is an energy-saving product.
Description
Technical field
The utility model relates to a kind of variable displacement pump, specifically a kind of inclined disc type shaft orientation plunger variable pump that is applicable to the open circuit Hydraulic Power Transmission System of excavator, hydraulic hoist.
Background technique
The pasta of joining of traditional valve plate for piston pump and cylinder body is a plane contact, and the process that runs up stationarity is relatively poor, and wedge gap appears in oil distribution casing and cylinder body easily, influences both sealings.
Traditional permanent power and variable plunger pump system, its performance are desirable not enough, because of always working under peak output, peak rate of flow, three kinds of extreme operating conditions of pressure maximum its main pump operation point, and are not all to need above operating mode constantly during host work.When turning round, during tight duty operations, during strong resistance fine motion,, and can't be its situation of control break by the people if must cause the waste of energy by above-mentioned characteristic operation as engine air.Prior art can realize that low pressure keeps, the function of high pressure cut-off, greatly reduces power loss, has saved the energy.
Summary of the invention
The purpose of this utility model is to provide a kind of inclined disc type shaft orientation plunger variable pump, and it can overcome oil pump under the high pressure holding state, still go the deficiency of work with big flow, big pressure, can make correct response to the variation of flow pressure demand.
The utility model comprises oil distribution casing, cylinder body, limited valve, swash plate, oil distribution casing is that sphere contacts with the pasta of joining of cylinder body, also comprise one group of load-sensing valve: flow control valve, pressure shut-off valve, power control valve, these three kinds of valves are integrated in the valve body, valve assembly by bolton on a side of pump postoperculum, with being connected of pump, thereby reach the function of valve controlled pump into and out of control port.
The utility model compared with prior art has following advantage:
This pump is made up of an inclined disc type shaft orientation plunger variable pump and one group of load-sensing valve two-part, when system does not work, can under lower pressure, keep holding state, when system changes working state over to, adjustable flow can be provided according to demand, realize that permanent power, load feedback LUDV assignment of traffic and low pressure keep, the function of high pressure cut-off.This combined pump has high efficiency, and the function that power loss is little can fuel saving, reduces the heating value of hydraulic system.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structure sectional view of the present utility model,
Fig. 2 is the K-K sectional view of Fig. 1.
Among the figure, 1. oil distribution casing, 2. cylinder body, 3. limited valve, 4. swash plate, 5. flow control valve, 6. pressure shut-off valve, 7. power control valve.
Embodiment
The utility model comprises oil distribution casing 1, cylinder body 2, limited valve 3, swash plate 4, oil distribution casing 1 is that sphere contacts with the pasta of joining of cylinder body 2, also comprise one group of load-sensing valve: flow control valve 5, pressure shut-off valve 6, power control valve 7, these three kinds of valves are integrated in the valve body, valve assembly by bolton on a side of pump postoperculum, with being connected of pump, thereby reach the function of valve controlled pump into and out of control port.
Oil distribution casing 1 is that sphere contacts with the pasta of joining of cylinder body 2, make cylinder body in the process of running up, good stationarity is arranged, improved the self-align ability of cylinder body in the working procedure, avoid oil distribution casing 1 and cylinder body 2 to occur wedge gap at work, making has good sealing property between them, thereby has improved the volumetric efficiency of pump greatly.
Also comprise one group of load-sensing valve: flow control valve 5, can regulate the flow of pump according to induced pressure, the traffic demand of oil pump output flow and executive component is adapted; Pressure shut-off valve 6, it is a kind of pressure control, and when load reached predefined force value, pressure shut-off valve was regulated automatically and is changed limited valve 3 cavity of resorption oil pressure, and limited valve impels swash plate 4 to be rocked near zero delivery to top offset; Power control valve 7, play permanent power control, it is under the effect of working pressure, pass through spool displacement, change the area of passage of the power governor of flowing through, make oil pump under constant rotating speed, corresponding minimizing makes oil pump be no more than the driving power of setting to discharge capacity with the same ratio of working pressure increase.Be P
B.V
g=constant (P
B-working pressure, V
g-discharge capacity).Thereby the available power of oil pump and motor is complementary.
This pump can be made correct response to the variation of flow pressure demand, and when induced pressure was low, oil pump can provide bigger flow, realized the executive component quick acting; When induced pressure increased, hydraulic pump control system was promptly made correctly corresponding, by accurate control, provided the necessary flow of keeping system's proper functioning.This combined pump mechanical output is constant substantially, and power loss is low, is an energy-saving and cost-reducing product.
Claims (1)
1. inclined disc type shaft orientation plunger variable pump, comprise oil distribution casing, cylinder body, limited valve, swash plate, it is characterized in that oil distribution casing is that sphere contacts with the pasta of joining of cylinder body, also comprise one group of load-sensing valve: flow control valve, flow control valve, power control valve, these three kinds of valves are integrated in the valve body, valve assembly by bolton on a side of pump postoperculum, with being connected of pump into and out of control port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200461518U CN201582080U (en) | 2010-01-15 | 2010-01-15 | Oblique tray type axial plunger piston variable pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200461518U CN201582080U (en) | 2010-01-15 | 2010-01-15 | Oblique tray type axial plunger piston variable pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201582080U true CN201582080U (en) | 2010-09-15 |
Family
ID=42724078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200461518U Expired - Fee Related CN201582080U (en) | 2010-01-15 | 2010-01-15 | Oblique tray type axial plunger piston variable pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201582080U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286184A (en) * | 2016-09-26 | 2017-01-04 | 太原理工大学 | A kind of variable displacement with constant power mechanism for axial plunger pump |
-
2010
- 2010-01-15 CN CN2010200461518U patent/CN201582080U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286184A (en) * | 2016-09-26 | 2017-01-04 | 太原理工大学 | A kind of variable displacement with constant power mechanism for axial plunger pump |
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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: 20100915 Termination date: 20120115 |