CN203516039U - K3v hydraulic pump variable control device - Google Patents
K3v hydraulic pump variable control device Download PDFInfo
- Publication number
- CN203516039U CN203516039U CN201320540714.2U CN201320540714U CN203516039U CN 203516039 U CN203516039 U CN 203516039U CN 201320540714 U CN201320540714 U CN 201320540714U CN 203516039 U CN203516039 U CN 203516039U
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- Prior art keywords
- piston
- guide
- hydraulic pump
- control device
- control
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- Expired - Fee Related
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Abstract
The utility model relates to a hydraulic pump, in particular to a K3V hydraulic pump variable control device which comprises a shell, a pilot cover, a feedback rod, a pilot piston and an adjusting ring. A control piston is arranged in the adjusting ring in the shell, and the pilot cover is provided with a second pilot piston corresponding to the control piston. Compared with the prior art, the second pilot piston and the control piston are additionally arranged, so that the higher the control pressure is, the larger the flow is when the hydraulic pump is controlled in positive flow.
Description
Technical field
the utility model relates to a kind of oil hydraulic pump, particularly a kind of K3V oil hydraulic pump variable control device.
Background technique
as shown in Figure 1, the pressure of negative control Pi carrys out the oil drain quantity of regulator solution press pump to prior art, and after engine start, control valve operating handle is when neutral position, and the pressure of pilot pressure Pi is the highest; The thrust of guide piston is greater than the thrust of guide's spring, guide piston moves to right side, now the oil drain quantity of pump is minimum, when control valve joystick manipulation arrives maximum position, the pressure of pilot pressure Pi becomes very little, the thrust of guide's plunger is also very little, and guide piston is shifted onto left side by guide's spring, and now the oil drain quantity of pump is maximum.
when joystick manipulation arrives 1/2nd position of stroke, 1/2nd places that guide's plunger also moves on to stroke stop; Oil drain quantity is 1/2nd of total displacement; This technology can only be used on the excavator of negative control, can not on the excavator of positive control, use.
Summary of the invention
the purpose of this utility model technical problem to be solved is to provide on the excavator that a kind of oil hydraulic pump that can make KV3 is contained in negative control and uses, and also can be arranged on the oil hydraulic pump variable control device using on the excavator of positive control.
the present invention adopts following technological scheme:
a K3V oil hydraulic pump variable control device, comprises housing, guide's lid, and feedback rod, guide piston, adjusts circle, is placed in the adjustment circle in housing control piston is housed, and guide covers the second guide piston being equipped with the corresponding setting of control piston.
adopt the utility model of technique scheme compared with prior art, the second guide piston adding and control piston can make oil hydraulic pump when positive flow is controlled, and pilot pressure is higher, and flow is larger.
preferred version of the present utility model is:
the second guide piston equates with the sectional area of control piston.
guide covers the oil inlet hole that is provided with the second guide piston.
flow on housing is adjusted the oil inlet hole that is provided with control piston on bolt.
Accompanying drawing explanation
fig. 1 is the structural representation of prior art.
fig. 2 is the utility model embodiment's structural representation.
fig. 3 is the hydraulic schematic diagram of prior art.
fig. 4 is the utility model embodiment's hydraulic schematic diagram.
Embodiment
below in conjunction with drawings and Examples in detail the utility model is described in detail
a kind of KV3 oil hydraulic pump variable control device, referring to accompanying drawing 2 and accompanying drawing 4, in figure: housing 1, feedback rod 2, adjustment bolt 3, guide piston 4, guide's spring 5, adjustment circle 6, guide are covered the 7, second guide piston oil inlet hole 8, the second guide piston 9, control piston oil inlet hole 10, control piston 11.
wherein the numbering in accompanying drawing 1 and accompanying drawing 3 is with the label in the present embodiment.
in the present embodiment, be placed in the adjustment circle 6 in housing 1 control piston 11 is housed, guide is covered the second guide piston 9 being equipped with on 7 with control piston 11 corresponding settings.
the second guide piston 9 equates with the cross-section area of control piston 11.
guide is covered the oil inlet hole 8 that is provided with the second guide piston 9 on 7.Flow on housing 1 is adjusted on bolt 3 and is provided with control piston oil inlet hole 10.
the hydraulic circuit of control piston 11 is positioned on control port; The oil circuit of the second guide piston 9 is connected on the oil outlet of oil hydraulic pump, and the working condition of installing after control piston 11 and the second guide piston 9 is:
after piloting engine, control valve operating handle is when meta, and pilot pressure is 0MPa, the thrust of the second guide piston 9 is greater than the thrust of guide's spring 5, guide piston 4 is shifted onto to right side, now, hydraulic pressure pump delivery is minimum, operating handle is when range, and pilot pressure is the highest, and guide's spring 5 now and control piston 11 are made a concerted effort, be greater than the thrust of the second guide piston 9, guide piston 4 is shifted onto to left side, and the oil drain quantity of oil hydraulic pump is large, has realized positive flow control.
Claims (4)
1. a K3V oil hydraulic pump variable control device, comprises housing, guide's lid, feedback rod, guide piston, adjusts circle, it is characterized in that: be placed in the adjustment circle in housing control piston is housed, guide covers the second guide piston being equipped with the corresponding setting of control piston.
2. K3V oil hydraulic pump variable control device according to claim 1, is characterized in that: the second guide piston equates with the sectional area of control piston.
3. K3V oil hydraulic pump variable control device according to claim 1, is characterized in that: guide covers the oil inlet hole that is provided with the second guide piston.
4. K3V oil hydraulic pump variable control device according to claim 1, is characterized in that: the flow on housing is adjusted the oil inlet hole that is provided with control piston on bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320540714.2U CN203516039U (en) | 2013-09-02 | 2013-09-02 | K3v hydraulic pump variable control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320540714.2U CN203516039U (en) | 2013-09-02 | 2013-09-02 | K3v hydraulic pump variable control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203516039U true CN203516039U (en) | 2014-04-02 |
Family
ID=50374977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320540714.2U Expired - Fee Related CN203516039U (en) | 2013-09-02 | 2013-09-02 | K3v hydraulic pump variable control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203516039U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593837A (en) * | 2017-02-10 | 2017-04-26 | 江苏恒立液压科技有限公司 | Variable control structure for hydraulic plunger pump and control method of variable control structure |
-
2013
- 2013-09-02 CN CN201320540714.2U patent/CN203516039U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593837A (en) * | 2017-02-10 | 2017-04-26 | 江苏恒立液压科技有限公司 | Variable control structure for hydraulic plunger pump and control method of variable control structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20160902 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |