CN202001293U - Linear conjugated inner meshing gear pump - Google Patents
Linear conjugated inner meshing gear pump Download PDFInfo
- Publication number
- CN202001293U CN202001293U CN2011201060980U CN201120106098U CN202001293U CN 202001293 U CN202001293 U CN 202001293U CN 2011201060980 U CN2011201060980 U CN 2011201060980U CN 201120106098 U CN201120106098 U CN 201120106098U CN 202001293 U CN202001293 U CN 202001293U
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- China
- Prior art keywords
- spool
- gear pump
- communicated
- main oil
- valve
- 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.)
- Expired - Lifetime
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- Rotary Pumps (AREA)
Abstract
The utility model relates to a linear conjugated inner meshing gear pump, which is characterized in that a balanced valve is arranged inside an upper pump body of a two-stage gear pump, the balanced valve comprises a spool I, a spool II, a balancing spring I and a balancing spring II, and the spool I and the spool II are butted end to end. The balancing spring I is butted between a head portion of the spool I and a valve cavity wall, and the balancing spring II is butted between a rear end portion of the spool II and the valve cavity wall. An oil return channel I and an oil return channel II which are communicated with a main oil channel P1 are arranged on the lower side of the valve cavity where the balancing spring I and the balancing spring II are arranged, the oil return channel I is communicated with the main oil channel P1arranged between a first-stage gear pump and a second-stage gear pump, and the oil return channel II is communicated with the main oil channel P1 arranged between the two-stage gear pump and an oil discharge outlet. The upper lateral side of the head portion of the spool I and the upper lateral side of the rear end portion of the spool II are both communicated with an oil return channel III which is communicated with the main oil channel P1 arranged between the one-stage gear pump and an oil suction port. The upper side of a valve cavity arranged between the spool I and the spool II is further communicated with the oil return channel III. The linear conjugated inner meshing gear pump has the advantages of guaranteeing safety in usage and prolonging service life.
Description
Technical field
The utility model relates to the gear pump in hydraulic equipment field, relates in particular to a kind of linear conjugated crescent gear pump.
Background technique
We analyze according to the product on the market and after the pump that has damaged opened and inspect at present, and 1, find between the axial crack of two pump chambers and have error between the warp-wise crack, illustrate in course of working, to be difficult to be consistent.2, user's improper use causes damage, because this gear pump structure mainly reaches pressure by controlling between the crack, thus very high to the requirement of hydraulic oil system turbidity test, smart oil purifier must be installed, must often clean after long-term the use, and most of user does not note this point.3, according to this pump structure characteristic analysis, when the maximum pressure operating mode, must not surpass 10-20 second during the per minute continuous running, so when system pressure surpasses rated pressure, each control actuating component produces that this pump uses the use that manually shuts down when malfunctioning in the system, otherwise has a strong impact on this pump working life.
Summary of the invention
The purpose of this utility model provides a kind of guarantee the safe in utilization of pump and the linear conjugated crescent gear pump that increases the service life.
Technological scheme to be solved in the utility model is: linear conjugated crescent gear pump, comprise the pump housing, inlet port, oil drain out, be provided with main oil gallery P1 and the main oil gallery P2 that is connected in the pump housing between inlet port and the oil drain out, be provided with one-level gear pump and secondary gear pump on the main oil gallery P1 respectively successively, above the two-stage gear pump, be provided with equilibrium valve in the pump housing, equilibrium valve comprises spool I and the spool II that offsets end to end, and two balance spring I, II, balance spring I is butted between spool I head and the valve cavity wall, balance spring II is butted between spool II afterbody and the valve cavity wall, balance spring I and balance spring II place valve pocket downside have back oil road I and the back oil road II that communicates with main oil gallery P1, back oil road I is communicated with main oil gallery P1 between one-level gear pump and the secondary gear pump, and back oil road II is communicated with main oil gallery P1 between secondary gear pump and the oil drain out; Spool I head upper side and spool II afterbody upper side all are communicated with back oil road III, and back oil road III is communicated with main oil gallery P1 between one-level gear pump and the inlet port; The valve pocket upside also is communicated with back oil road III between spool I and the spool II.
The pump housing of described main oil gallery P1 and top, main oil gallery P2 joint is provided with pilot operated compound relief valve, and pilot operated compound relief valve comprises valve rod, has flow-off on the pump housing of valve rod side.
The capacity of working as one-level gear pump and secondary gear pump in the technique scheme is identical, when hydraulic coupling keeps 2:1, equilibrium valve is co-located in state of equilibrium, when one-level gear pump flow during greater than the secondary gear pump duty, cause the pressure of main oil gallery P1 to rise, destroyed the state of equilibrium of equilibrium valve, promote spool I to left translation, send unnecessary oil mass back to inlet port, when secondary gear pump duty during greater than one-level gear pump flow, the pressure of main oil gallery P1 reduces, this moment, the pressure promotion spool II of main oil gallery P2 passed to the right, sent the fluid of main oil gallery P2 back to inlet port, repeated to produce new balance like this, solve two gear pump cavity pressure balances, also can not produce the pump housing high temperature that produces because of entrap phenomenon simultaneously.
The pump housing of described main oil gallery P1 and top, main oil gallery P2 joint is provided with pilot operated compound relief valve; pilot operated compound relief valve comprises valve rod; have flow-off on the pump housing of valve rod side; increased the protective measure of self; in the running work of pump, when system pressure needs pressure 10% above the user, the manual tune relief valve; unnecessary fluid is sent back to mailbox, guarantee the safe in utilization of pump and increase the service life.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Wherein: 1, the pump housing, 2, inlet port, 3, oil drain out, 4, valve pocket, 5 valve rods, 6, one-level gear pump, 7, the secondary gear pump, 8, equilibrium valve, 9, spool I, 10, spool II, 11, balance spring I, 12, balance spring II, 13, back oil road I, 14, back oil road II, 15, back oil road III, 16, pilot operated compound relief valve, 17, flow-off, P1, main oil gallery P1, P2, main oil gallery P2.
Embodiment
As shown in Figure 1, linear conjugated crescent gear pump, comprise the pump housing 1, inlet port 2, oil drain out 3, be provided with main oil gallery P14 and the main oil gallery P25 that is connected in the pump housing 1 between inlet port 2 and the oil drain out 3, be provided with one-level gear pump 6 and secondary gear pump 7 on the main oil gallery P14 respectively successively, above the two-stage gear pump, be provided with equilibrium valve 8 in the pump housing 1, equilibrium valve 8 comprises spool I9 and the spool II10 that offsets end to end, and two balance spring I11, II12, balance spring I11 is butted between spool I12 head and the valve cavity wall, balance spring II112 is butted between spool II10 afterbody and the valve cavity wall, balance spring I11 and balance spring II12 place valve pocket 4 downsides have back oil road I13 and the back oil road II14 that communicates with main oil gallery P1, back oil road I13 is communicated with main oil gallery P1 between one-level gear pump 6 and the secondary gear pump 7, and back oil road II14 is communicated with main oil gallery P1 between secondary gear pump 7 and the oil drain out; Spool I9 head upper side and spool II afterbody upper side all are communicated with back oil road III, and back oil road III is communicated with main oil gallery P1 between one-level gear pump and the inlet port; Valve pocket 4 upsides also are communicated with back oil road III between spool I and the spool II.The pump housing 1 of main oil gallery P1 and top, main oil gallery P2 joint is provided with pilot operated compound relief valve 16, and pilot operated compound relief valve 16 comprises valve rod 5, has flow-off 17 on the pump housing 1 of valve rod 5 sides.
When the capacity of one-level gear pump 6 and secondary gear pump 7 identical, when hydraulic coupling keeps 2:1, equilibrium valve 8 is co-located in state of equilibrium, when one-level gear pump 6 flows during greater than secondary gear pump 7 flows, cause the pressure of main oil gallery P1 to rise, destroyed the state of equilibrium of equilibrium valve 8, promote spool I9 to left translation, send unnecessary oil mass back to inlet port 2, when secondary gear pump 7 flows during greater than one-level gear pump 6 flows, the pressure of main oil gallery P1 reduces, this moment, the pressure promotion spool II10 of main oil gallery P2 passed to the right, sent the fluid of main oil gallery P2 back to inlet port 2, repeated to produce new balance like this, solve two gear pump cavity pressure balances, also can not produce the pump housing high temperature that produces because of entrap phenomenon simultaneously.
The pump housing 1 of main oil gallery P1 and top, main oil gallery P2 joint is provided with pilot operated compound relief valve 16; pilot operated compound relief valve 16 comprises valve rod 5; have flow-off 17 on the pump housing of valve rod 5 sides; increased the protective measure of self; in the running work of pump, when system pressure needs pressure 10% above the user, manual tune pilot operated compound relief valve 16; unnecessary fluid is sent back to fuel tank, guarantee the safe in utilization of pump and increase the service life.
Claims (2)
1. linear conjugated crescent gear pump, comprise the pump housing, inlet port, oil drain out, be provided with main oil gallery P1 and the main oil gallery P2 that is connected in the pump housing between described inlet port and the oil drain out, be provided with one-level gear pump and secondary gear pump on the described main oil gallery P1 respectively successively, it is characterized in that: above the two-stage gear pump, be provided with equilibrium valve in the pump housing, described equilibrium valve comprises spool I and the spool II that offsets end to end, and two balance spring I, II, described balance spring I is butted between spool I head and the valve cavity wall, described balance spring II is butted between spool II afterbody and the valve cavity wall, described balance spring I and balance spring II place valve pocket downside have back oil road I and the back oil road II that communicates with main oil gallery P1, described back oil road I is communicated with main oil gallery P1 between one-level gear pump and the secondary gear pump, and described back oil road II is communicated with main oil gallery P1 between secondary gear pump and the oil drain out; Described spool I head upper side and spool II afterbody upper side all are communicated with back oil road III, and described back oil road III is communicated with main oil gallery P1 between one-level gear pump and the inlet port; The valve pocket upside also is communicated with back oil road III between described spool I and the spool II.
2. linear conjugated crescent gear pump according to claim 1, the pump housing that it is characterized in that described main oil gallery P1 and main oil gallery P2 joint top is provided with pilot operated compound relief valve, described pilot operated compound relief valve comprises valve rod, has flow-off on the pump housing of described valve rod side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201060980U CN202001293U (en) | 2011-04-13 | 2011-04-13 | Linear conjugated inner meshing gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201060980U CN202001293U (en) | 2011-04-13 | 2011-04-13 | Linear conjugated inner meshing gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202001293U true CN202001293U (en) | 2011-10-05 |
Family
ID=44704036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201060980U Expired - Lifetime CN202001293U (en) | 2011-04-13 | 2011-04-13 | Linear conjugated inner meshing gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202001293U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135093A (en) * | 2011-04-13 | 2011-07-27 | 姜卫东 | Linear conjugate internal gearing gear pump |
| CN109209865A (en) * | 2018-11-21 | 2019-01-15 | 太原科技大学 | A kind of axle sleeve and method inhibiting gear pump noise |
-
2011
- 2011-04-13 CN CN2011201060980U patent/CN202001293U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135093A (en) * | 2011-04-13 | 2011-07-27 | 姜卫东 | Linear conjugate internal gearing gear pump |
| CN102135093B (en) * | 2011-04-13 | 2012-12-26 | 姜卫东 | Linear conjugate internal gearing gear pump |
| CN109209865A (en) * | 2018-11-21 | 2019-01-15 | 太原科技大学 | A kind of axle sleeve and method inhibiting gear pump noise |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111005 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |