CN204570788U - Hydraulic pump of excavator system - Google Patents
Hydraulic pump of excavator system Download PDFInfo
- Publication number
- CN204570788U CN204570788U CN201420863137.5U CN201420863137U CN204570788U CN 204570788 U CN204570788 U CN 204570788U CN 201420863137 U CN201420863137 U CN 201420863137U CN 204570788 U CN204570788 U CN 204570788U
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- hydraulic pump
- hydraulic
- pluger type
- reducing valve
- type hydraulic
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Abstract
The utility model discloses a kind of hydraulic pump of excavator system, belong to excavator hydraulic system technical field, comprise the first pluger type hydraulic pump (1), second pluger type hydraulic pump (2) and hydraulic oil container (4), also comprise reducing valve (3), first pluger type hydraulic pump (1) and the second pluger type hydraulic pump (2) series connection, the high pressure hydraulic fluid port of the first pluger type hydraulic pump (1) supplies hydraulic oil by main control valve to hydraulic system, the high pressure hydraulic fluid port of the second pluger type hydraulic pump (2) is divided into two-way, main control valve of leading up to supplies hydraulic oil to hydraulic system, another road is connected to reducing valve (3) for pilot control system fuel feeding, reducing valve (3) is connected to hydraulic oil container (4).Beneficial effect is the axial dimension optimizing hydraulic pump system, and structure is compacter, and hosting space utilizes more reasonable, and the weight of hydraulic pump system and cost have also been obtained reduction simultaneously.
Description
Technical field
The utility model relates to a kind of hydraulic pump of excavator system, belongs to excavator hydraulic system technical field.
Background technology
Hydraulic pump system is the energy source device of excavator hydraulic system, for hydraulic system provides required hydraulic oil, to complete the various actions such as excavator walking, revolution and digging operation.
Current excavator main flow liquid pressing system is mainly divided into positive flow, minus flow and load-sensitive three types, wherein positive flow and minus flow hydraulic pump that hydraulic system uses are three series connection of pumps formula structures, and namely two pluger type hydraulic pumps and a gear pump are cascaded; Two pluger type hydraulic pumps are as the energy source device of excavator executive component and oil cylinder and motor, the each main actions exported for excavator provides high pressure liquid force feed, gear pump is then as the energy source device of pilot system, for pilot control system provides hydraulic oil, adopting in this way existing deficiency is: three series connection of pumps formula structures in the axial direction take up space comparatively large, cause assembling aft engine space availability ratio lower; Hydraulic pump three series connection of pumps in addition, its heavier-weight, assembling inconvenience.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of excavator hydraulic pump, solves the problem of hydraulic pump space underutilization on main frame.
To achieve these goals, the technical solution adopted in the utility model is: a kind of hydraulic pump of excavator system, comprise the first pluger type hydraulic pump, second pluger type hydraulic pump and hydraulic oil container, also comprise reducing valve, first pluger type hydraulic pump and the second plunger hydraulic series connection of pumps, the high pressure hydraulic fluid port of the first pluger type hydraulic pump supplies hydraulic oil by main control valve to hydraulic system, the high pressure hydraulic fluid port of the second pluger type hydraulic pump is divided into two-way, main control valve of leading up to supplies hydraulic oil to hydraulic system, it is pilot control system fuel feeding that another road is connected to reducing valve, reducing valve is connected to hydraulic oil container.
Described reducing valve is adjustable compression release valve.
The adjustable range of the outlet pressure of described adjustable compression release valve is 0-6MPa.
The utility model optimizes the axial dimension of hydraulic pump system, and structure is compacter, and hosting space utilizes more reasonable, and the weight of hydraulic pump system and cost have also been obtained reduction simultaneously.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present utility model.
In figure: 1, the first pluger type hydraulic pump, the 2, second pluger type hydraulic pump, 3, reducing valve, 4, hydraulic oil container.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1: the utility model comprises the first pluger type hydraulic pump 1, second pluger type hydraulic pump 2 and hydraulic oil container 4, also comprise reducing valve 3, first pluger type hydraulic pump 1 and the second pluger type hydraulic pump 2 are connected, the high pressure hydraulic fluid port of the first pluger type hydraulic pump 1 supplies hydraulic oil by main control valve to hydraulic system, the high pressure hydraulic fluid port of the second pluger type hydraulic pump 2 is divided into two-way, main control valve of leading up to supplies hydraulic oil to hydraulic system, another road is connected to reducing valve 3 for pilot control system fuel feeding, and reducing valve 3 is connected to hydraulic oil container 4.
Reducing valve 3 in the utility model is adjustable compression release valve, and for reducing pressure to hydraulic oil and can regulating pressure, the adjustable range of the outlet pressure of this adjustable compression release valve can be 0-6MPa, and this pressure regulation spectrum can meet system requirements.
Native system in the course of the work, first pluger type hydraulic pump 1 is completely to hydraulic system supply hydraulic oil, the high pressure hydraulic fluid port of the second pluger type hydraulic pump 2 divides two-way, one road direction hydraulic system supply hydraulic oil, to meet the normal demand of each action of excavator, another road hydraulic oil is after reducing valve 3 reduces pressure simultaneously, supply pilot control system, uses using the control oil as excavator pilot control system; Oil mass required for pilot control system is less, therefore substantially can not have an impact to each action of main frame from the hydraulic oil that the second pluger type hydraulic pump 2 branches to pilot control system.
Claims (3)
1. a hydraulic pump of excavator system, comprise the first pluger type hydraulic pump (1), second pluger type hydraulic pump (2) and hydraulic oil container (4), it is characterized in that, also comprise reducing valve (3), first pluger type hydraulic pump (1) and the second pluger type hydraulic pump (2) series connection, the high pressure hydraulic fluid port of the first pluger type hydraulic pump (1) supplies hydraulic oil by main control valve to hydraulic system, the high pressure hydraulic fluid port of the second pluger type hydraulic pump (2) is divided into two-way, main control valve of leading up to supplies hydraulic oil to hydraulic system, another road is connected to reducing valve (3) for pilot control system fuel feeding, reducing valve (3) is connected to hydraulic oil container (4).
2. a kind of hydraulic pump of excavator system according to claim 1, is characterized in that, described reducing valve (3) is adjustable compression release valve.
3. a kind of hydraulic pump of excavator system according to claim 2, is characterized in that, the adjustable range of the outlet pressure of described adjustable compression release valve is 0-6MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420863137.5U CN204570788U (en) | 2014-12-31 | 2014-12-31 | Hydraulic pump of excavator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420863137.5U CN204570788U (en) | 2014-12-31 | 2014-12-31 | Hydraulic pump of excavator system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204570788U true CN204570788U (en) | 2015-08-19 |
Family
ID=53863450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420863137.5U Active CN204570788U (en) | 2014-12-31 | 2014-12-31 | Hydraulic pump of excavator system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204570788U (en) |
-
2014
- 2014-12-31 CN CN201420863137.5U patent/CN204570788U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |