CN103939337A - Gear pump with built-in unloading device - Google Patents
Gear pump with built-in unloading device Download PDFInfo
- Publication number
- CN103939337A CN103939337A CN201410163712.5A CN201410163712A CN103939337A CN 103939337 A CN103939337 A CN 103939337A CN 201410163712 A CN201410163712 A CN 201410163712A CN 103939337 A CN103939337 A CN 103939337A
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- CN
- China
- Prior art keywords
- valve rod
- valve
- gear pump
- pump cover
- limiting mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention belongs to parts of hydraulic equipment and in particular relates to a gear pump with a built-in unlading device. The gear pump comprises a front pump body (1), a rear pump cover (7), a gear shaft (12) and a check valve (3), wherein a valve rod limiting mechanism (5) and a valve rod normalized limiting mechanism (8) are correspondingly arranged in the left end surface and the right end surface of the rear pump cover (7); a valve rod (6) is arranged in the valve rod limiting mechanism (5) and the valve rod normalized limiting mechanism (8); a diameter shrinking rod (6-1) is arranged in the middle of the valve rod (6); the check valve (3) is arranged in an oil outlet (2) in the left end surface of the rear pump cover (7); a check valve outer high-pressure cavity A is formed between the check valve (3) in the radial direction and the valve rod (6); the outer high-pressure cavity A is communicated with the right end of the check valve (3) to form a gear pump high-pressure cavity B with the valve rod (6); a communicating oil inlet (9) in the rear pump cover (7) is provided with a gear pump low-pressure cavity C; an adjustable screw rod (4) is arranged in the center of the exposed blocking end surface of the valve rod limiting mechanism (5). According to the gear pump with the built-in unloading device, the impact caused by frequent starting is alleviated, so that the whole hydraulic system is safe and reliable, the cost is reduced and the service life of the system is prolonged.
Description
Technical field
The invention belongs to hydraulic equipment components and parts, particularly a kind of built-in relief arrangement gear pump.
Background technique
At present, in the hoisting system of existing various hydraulic pressure, especially vehicle hoisting system, because hydraulic element are too much, and the function singleness of each element, make system assorted numerous, hydraulic system volume is excessive, causes hydraulic power consumption large, cost of idleness and the energy, in addition, have a strong impact on the working life of gear pump, increase maintenance cost.
Summary of the invention
The object of the invention is to overcome above-mentioned technical deficiency, a kind of simple in structure, volume is little, easy to use, working efficiency is high built-in relief arrangement gear pump is provided.
The technological scheme that technical solution problem of the present invention adopts is: built-in relief arrangement gear pump comprises the front pump housing, rear pump cover, gear shaft, one-way valve, be characterized in that correspondence is equipped with valve stem spacing mechanism and valve rod normality position-limit mechanism in the left side of rear pump cover and right side, in valve stem spacing mechanism and valve rod normality mechanism, valve rod is housed, one section of undergauge bar is established in the centre of valve rod, in oil outlet in the left side of rear pump cover, one-way valve is housed, one-way valve radially and between valve rod, form the outer hyperbaric chamber of one-way valve, be communicated with formative gear pump hyperbaric chamber between valve rod with one-way valve right-hand member, in rear pump cover, be communicated with filler opening and be provided with gear pump low-pressure cavity, the center on shutoff end face of exposing in valve stem spacing mechanism is provided with adjustable screw mandrel.
Beneficial effect of the present invention is: built-in relief arrangement gear pump is in the time that hydraulic system needs pressure oil, gear pump pressure oil output, and pressure oil does not reflux, in the time that system does not need gear pump pressure oil output, by controlling the position of valve rod, the hyperbaric chamber of gear pump is communicated with low-pressure cavity, inner off-load, gear pump, in idling conditions, makes it reduce the impact bringing due to frequent starting, make the safe and reliable cost that reduced of whole hydraulic system, improve system working life.
Brief description of the drawings
Illustrate with embodiment below in conjunction with accompanying drawing.
Fig. 1 is built-in relief arrangement gear pump structure figure.
In figure, the pump housing before 1-; 2-oil outlet; 3-one-way valve; 4-is adjustable screw mandrel; 5-valve stem spacing mechanism; 6-valve rod; 6-1-undergauge bar; 7-rear pump cover; 7-1-valve opening; 8-valve rod normality position-limit mechanism; 9-filler opening; 10-packing ring; 11-clamping bolt; 12-gear shaft; The outer hyperbaric chamber of A-one-way valve; B-gear pump hyperbaric chamber; C-gear pump low-pressure cavity.
Embodiment
Embodiment, with reference to accompanying drawing 1, in the left side of the rear pump cover 7 of built-in relief arrangement gear pump and right side, correspondence is equipped with valve stem spacing mechanism 5 and valve rod normality position-limit mechanism 8, in valve stem spacing mechanism 5 and valve rod normality position-limit mechanism 8 and valve opening 7-1, valve rod 6 is housed, one section of undergauge bar 6-1 is established in the centre of valve rod 6.In oil outlet 2 in the left side of rear pump cover 7, one-way valve 3 is housed, one-way valve 3 radially and between valve rod 6, form the outer hyperbaric chamber A of one-way valve, be communicated with formative gear pump hyperbaric chamber B between valve rod 6 with one-way valve 3 right-hand members, be provided with gear pump low-pressure cavity C at the interior connection filler opening 9 of rear pump cover 7.The center on shutoff end face of exposing in valve stem spacing mechanism 5 is provided with adjustable screw mandrel 4, for adjusting valve rod 6 strokes, with valve rod 6 Vertical direction, gear shaft 12 is housed, together with the front pump housing 1 use packing ring 10 is fastening with rear pump cover 7 with clamping bolt 11 in rear pump cover 7.
The working procedure of built-in relief arrangement gear pump is: in the time of the position of valve rod 6 in Fig. 1, valve rod 6 seals gear pump hyperbaric chamber B one end, at this moment high pressure oil is opened one-way valve 3, flows out through oil outlet 2, supplies with hydraulic system, high pressure oil through one-way valve 3 can not reflux, enter in valve stem spacing mechanism 5 when valve rod 6 moves to left, gear pump hyperbaric chamber B and gear pump low-pressure cavity C communicate, inner off-load, at this moment gear pump idle running, avoids because frequent starting impacts hydraulic element.
Claims (1)
1. a built-in relief arrangement gear pump, comprise the front pump housing (1), rear pump cover (7), gear shaft (12), one-way valve (3), it is characterized in that correspondence is equipped with valve stem spacing mechanism (5) and valve rod normality position-limit mechanism (8) in the left side of rear pump cover (7) and right side, in valve stem spacing mechanism (5) and valve rod normality mechanism (8), valve rod (6) is housed, one section of undergauge bar (6-1) is established in the centre of valve rod (6), in oil outlet (2) in the left side of rear pump cover (7), one-way valve (3) is housed, one-way valve (3) radially and between valve rod (6), form the outer hyperbaric chamber A of one-way valve, be communicated with formative gear pump hyperbaric chamber B between valve rod (6) with one-way valve (3) right-hand member, in rear pump cover (7), be communicated with filler opening (9) and be provided with gear pump low-pressure cavity C, the center on shutoff end face of exposing in valve stem spacing mechanism (5) is provided with adjustable screw mandrel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410163712.5A CN103939337A (en) | 2014-04-23 | 2014-04-23 | Gear pump with built-in unloading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410163712.5A CN103939337A (en) | 2014-04-23 | 2014-04-23 | Gear pump with built-in unloading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939337A true CN103939337A (en) | 2014-07-23 |
Family
ID=51187168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410163712.5A Pending CN103939337A (en) | 2014-04-23 | 2014-04-23 | Gear pump with built-in unloading device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103939337A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257534A (en) * | 2015-10-30 | 2016-01-20 | 深圳市科睿精密科技有限公司 | Pressure relief protection gear pump, manufacturing method and pressure relief protection method of pressure relief protection gear pump |
| CN113202747A (en) * | 2021-06-23 | 2021-08-03 | 河南航天液压气动技术有限公司 | Rotary plate pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3182596A (en) * | 1963-05-31 | 1965-05-11 | Borg Warner | Hydraulic systems and pumps |
| US4502845A (en) * | 1983-03-24 | 1985-03-05 | General Motors Corporation | Multistage gear pump and control valve arrangement |
| EP0426278A1 (en) * | 1989-10-31 | 1991-05-08 | Borg-Warner Automotive, Inc. | Dual capacity fluid pump |
| JP2006233776A (en) * | 2005-02-22 | 2006-09-07 | Toyota Motor Corp | External gear pump |
| CN202273935U (en) * | 2011-10-27 | 2012-06-13 | 泊姆克(天津)液压有限公司 | Lifting control valve assembly for self-dumping automobile |
| CN203783893U (en) * | 2014-04-23 | 2014-08-20 | 阜新安联液压有限公司 | Gear pump internally provided with unloading device |
-
2014
- 2014-04-23 CN CN201410163712.5A patent/CN103939337A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3182596A (en) * | 1963-05-31 | 1965-05-11 | Borg Warner | Hydraulic systems and pumps |
| US4502845A (en) * | 1983-03-24 | 1985-03-05 | General Motors Corporation | Multistage gear pump and control valve arrangement |
| EP0426278A1 (en) * | 1989-10-31 | 1991-05-08 | Borg-Warner Automotive, Inc. | Dual capacity fluid pump |
| JP2006233776A (en) * | 2005-02-22 | 2006-09-07 | Toyota Motor Corp | External gear pump |
| CN202273935U (en) * | 2011-10-27 | 2012-06-13 | 泊姆克(天津)液压有限公司 | Lifting control valve assembly for self-dumping automobile |
| CN203783893U (en) * | 2014-04-23 | 2014-08-20 | 阜新安联液压有限公司 | Gear pump internally provided with unloading device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257534A (en) * | 2015-10-30 | 2016-01-20 | 深圳市科睿精密科技有限公司 | Pressure relief protection gear pump, manufacturing method and pressure relief protection method of pressure relief protection gear pump |
| CN105257534B (en) * | 2015-10-30 | 2017-09-05 | 深圳市科睿精密科技有限公司 | Decompression protection gear pump, manufacture method and its decompression protection method |
| CN113202747A (en) * | 2021-06-23 | 2021-08-03 | 河南航天液压气动技术有限公司 | Rotary plate pump |
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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 | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140723 |