CN103256218B - A kind of inside engaged gear formula oil transfer pump - Google Patents
A kind of inside engaged gear formula oil transfer pump Download PDFInfo
- Publication number
- CN103256218B CN103256218B CN201310213157.8A CN201310213157A CN103256218B CN 103256218 B CN103256218 B CN 103256218B CN 201310213157 A CN201310213157 A CN 201310213157A CN 103256218 B CN103256218 B CN 103256218B
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- Prior art keywords
- shoulder hole
- pump
- cover
- hole
- oil transfer
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Abstract
The present invention relates to a kind of inside engaged gear formula oil transfer pump, comprise external rotor, internal rotor, the pump housing, thrust plate and cover of feed pump, an end face of the described pump housing and described thrust plate seal fixing, another end face and described cover of feed pump seal fixing, described external rotor and described internal rotor are arranged in the cavity of pump body and also fix with stationary axle respectively, described external rotor drives internal rotor to rotate by stationary axle, and two cavitys between described external rotor and internal rotor are communicated with the arc-shaped through hole on thrust plate with the shoulder hole on described cover of feed pump respectively.The present invention adopts split-type structural, and processing is simple, and cost is low; Oil transfer pump cover plate devises check valve structure, and from safety check process when exhaust, during normal operation in normal, closure of check ring, does not affect normal use; When keeping low-speed performance constant, oil transfer pump cover plate place increases pressure limiting valve structure, and instant gets off Pressure Drop, protects other component not damaged.
Description
Technical field
The present invention relates to a kind of oil transfer pump, particularly a kind of inside engaged gear formula oil transfer pump.
Background technique
Along with national emission regulation demands is more and more stricter, oil-fired system is also progressively to common rail transition, and common rail pump requires that fuel feeding is steady, and especially during low speed, mainly adopt gear fuel supply pump at present, gear fuel supply pump low-speed performance is good, but some surplus of high speed performance.And the requirement on machining accuracy of gear fuel supply pump to part is higher.It may be necessary design the shortcoming of gear fuel supply pump is removed.
Prior art is that oil delivery pump body adopts monolithic construction, the exigent machining accuracy of interior concave bottom surface; During oil-fired system exhaust, undertaken by the end clearance of inner and outer Rotator, because end clearance is very little, so vent ratio is more difficult; When pump speed is higher, oil transfer pump chamber pressure is very high, so extremely easily inner and outer Rotator squeeze crack.To sum up, the shortcoming of prior art is that processing cost is high, and exhaust problem, reliability is low.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of pump housing and cover of feed pump is split-type structural and increases the inside engaged gear formula oil transfer pump having check valve structure and pressure-relief valve structure.
The technological scheme that the present invention solves the problems of the technologies described above is as follows: a kind of inside engaged gear formula oil transfer pump, comprise external rotor, internal rotor, the pump housing, thrust plate and cover of feed pump, described pump housing central authorities are provided with cavity, described thrust plate central authorities are provided with manhole, the bilateral symmetry of manhole is provided with a pair circular arc through hole, and the inside of described cover of feed pump is provided with outlet valve and Decompression valves, and described outlet valve and Decompression valves are a pair relative circular shape on the cross section of cover of feed pump bottom surface;
An end face of the described pump housing and described thrust plate seal fixing, another end face and described cover of feed pump seal fixing, described external rotor and described internal rotor are arranged in the cavity of pump body and also fix with stationary axle respectively, described external rotor drives internal rotor to rotate by stationary axle, and two cavitys between described external rotor and internal rotor are communicated with the arc-shaped through hole on thrust plate with the shoulder hole on described cover of feed pump respectively.
The invention has the beneficial effects as follows: adopt split-type structural, do not have interior concave bottom surface, processing is simple, and cost is low; Cover of feed pump devises check valve structure, and from safety check process when exhaust, during normal operation in normal, closure of check ring, does not affect normal use; When keeping low-speed performance constant, oil transfer pump cover plate place increases pressure limiting valve structure, and when pump speed is higher, oil transfer pump chamber pressure exceedes setting value, and instant gets off Pressure Drop, protects other component not damaged.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described outlet valve comprises little guide pin bushing, safety check, the first spring and screw;
The outer wall of described outlet valve is the first shoulder hole being arranged at cover of feed pump inside, filler opening is provided with at the bottom of the hole of described first shoulder hole, the top of described filler opening is provided with the little guide pin bushing fixing with the hole wall of the first shoulder hole, the top of described little guide pin bushing is provided with safety check, described safety check is fixedly connected with one end of described first spring, the other end of described first spring and the hole wall of described first shoulder hole are fixed, the aperture place of described screw and described first shoulder hole seals fixing, and the below of described screw 8 is provided with oil outlet.
Adopting the beneficial effect of above-mentioned further scheme to be increase exhaust structure in oil transfer pump cover plate, when not affecting other performances, being conducive to oil-fired system exhaust.
Further, the first gasket seal is also provided with between the aperture of described screw and described first shoulder hole.
The beneficial effect of above-mentioned further scheme is adopted to be contribute to improving the sealing between screw and the aperture of the first shoulder hole.
Further, described Decompression valves comprises large guide pin bushing, steel ball, the second spring, back-up ring, adjustment pad and adjusting screw;
The outer wall of described Decompression valves is the second shoulder hole being arranged at cover of feed pump inside, oil outlet is provided with at the bottom of the hole of described second shoulder hole, the top of described oil outlet is provided with the large guide pin bushing fixing with the hole wall of described second shoulder hole, the top of described large guide pin bushing is disposed with steel ball, second spring, back-up ring and adjustment pad, one end of described steel ball and described second spring extrudes fixing, the other end of described second spring and the inwall of described second shoulder hole are fixed, described back-up ring is fixed on the inwall of described second shoulder hole, the aperture place of described adjusting screw and described second shoulder hole seals fixing, the below of described adjusting screw is provided with filler opening.
The beneficial effect of above-mentioned further scheme is adopted to be increase pressure-relief valve structure in oil transfer pump cover plate, when rotating speed is higher, when oil transfer pump cavity pressure exceedes setting value, can pressure release timely, protect other component not to be destroyed.
Further, the second gasket seal is provided with between the eating dishes without rice or wine of described adjusting screw and described second shoulder hole.
The beneficial effect of above-mentioned further scheme is adopted to be contribute to improving the sealing between adjusting screw and the aperture of the second shoulder hole.
Further, the first seal ring is provided with between the described pump housing and described cover of feed pump.
The beneficial effect of above-mentioned further scheme is adopted to be improve the sealing between the pump housing and cover of feed pump.
Further, the second seal ring is provided with between the described pump housing and described thrust plate.
The beneficial effect of above-mentioned further scheme is adopted to be improve the sealing between the pump housing and thrust plate.
Further, the edge of described external rotor is provided with seven magnetic poles.
Further, the edge of described internal rotor is provided with six magnetic poles.
Accompanying drawing explanation
Fig. 1 is overall structure left view of the present invention;
Fig. 2 is that overall structure A-A of the present invention is to sectional view.
In accompanying drawing, the list of parts representated by each label is as follows:
1, the first seal ring, 2, external rotor, 3, internal rotor, 4, the pump housing, 5, thrust plate, the 6, second seal ring, 7, cover of feed pump, 8, screw, 9, the first gasket seal, the 10, first spring, 11, safety check, 12, little guide pin bushing, 13, adjusting screw, the 14, second gasket seal, 15, adjustment pad, 16, back-up ring, 17, the second spring, 18, steel ball, 19, large guide pin bushing, 20, outlet valve, 21, Decompression valves, 22, filler opening, 23, oil outlet.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, be overall structure sectional view of the present invention; Fig. 2 is overall structure left view of the present invention.
Embodiment 1
A kind of inside engaged gear formula oil transfer pump, comprise external rotor 2, internal rotor 3, the pump housing 4, thrust plate 5 and cover of feed pump 7, the described pump housing 4 central authorities are provided with cavity, described thrust plate 5 central authorities are provided with manhole, the bilateral symmetry of manhole is provided with a pair circular arc through hole, and the inside of described cover of feed pump 7 is provided with outlet valve 20 and Decompression valves 21, and described outlet valve 20 and Decompression valves 21 are a pair relative circular shape on the cross section of cover of feed pump 7 bottom surface;
An end face of the described pump housing 4 and described thrust plate 5 seal fixing, another end face and described cover of feed pump 7 seal fixing, described external rotor 2 is arranged in the cavity of the pump housing 4 inside with described internal rotor 3 and also fixes with stationary axle respectively, described external rotor 2 drives internal rotor 3 to rotate by stationary axle, and two cavitys between described external rotor 2 and internal rotor 3 are communicated with the arc-shaped through hole on thrust plate 5 with the shoulder hole on described cover of feed pump 7 respectively.
Described outlet valve 20 comprises little guide pin bushing 12, safety check 11, the first spring 10 and screw 8;
The outer wall of described outlet valve 20 is the first shoulder hole being arranged at cover of feed pump 7 inside, filler opening 22 is provided with at the bottom of the hole of described first shoulder hole, the top of described filler opening 22 is provided with the little guide pin bushing 12 fixing with the hole wall of the first shoulder hole, the top of described little guide pin bushing 12 is provided with safety check 11, described safety check 11 is fixedly connected with one end of described first spring 10, the other end of described first spring 10 and the hole wall of described first shoulder hole are fixed, described screw 8 and the aperture place of described first shoulder hole seal fixing, the below of described screw 8 is provided with oil outlet 23.
The first gasket seal 9 is also provided with between the aperture of described screw 8 and described first shoulder hole.
Described Decompression valves 21 comprises large guide pin bushing 19, steel ball 18, the second spring 17, back-up ring 16, adjustment pad 15 and adjusting screw 13;
The outer wall of described Decompression valves 21 is the second shoulder hole being arranged at cover of feed pump 7 inside, oil outlet 23 is provided with at the bottom of the hole of described second shoulder hole, the top of described oil outlet 23 is provided with the large guide pin bushing 19 fixing with the hole wall of described second shoulder hole, the top of described large guide pin bushing 19 is disposed with steel ball 18, second spring 17, back-up ring 16 and adjustment pad 15, described steel ball 18 and one end of described second spring 17 extrude fixing, the other end of described second spring 17 and the inwall of described second shoulder hole are fixed, described back-up ring 16 is fixed on the inwall of described second shoulder hole, described adjusting screw 13 and the aperture place of described second shoulder hole seal fixing, the below of described adjusting screw 13 is provided with filler opening 22.
The second gasket seal 14 is provided with between the eating dishes without rice or wine of described adjusting screw 13 and described second shoulder hole.
The first seal ring 1 is provided with between the described pump housing 4 and described cover of feed pump 7.The second seal ring 6 is provided with between the described pump housing 4 and described thrust plate 5.The edge of described external rotor 2 is provided with seven magnetic poles.The edge of described internal rotor 3 is provided with six magnetic poles.
Oil delivery pump body of the present invention is split as oil delivery pump body 4 and cover of feed pump 7, and interior edge face becomes the exterior edge face of cover of feed pump.
When oil-fired system is vented, from filler opening oil-feed, fuel-displaced from oil outlet, inlet pressure is high, oil outlet pressure is low, and can open the first spring 10 and make oil circuit unimpeded, oil outlet pressure is high when working properly, inlet pressure is low, and safety check is in closed condition, does not affect work.
The rigidity of the second spring will be far longer than the first spring, can not open at exhaust phase second spring.
When rotating speed raises, when the pressure of oil outlet exceedes setting value, steel ball 18 can be backed down, oil outlet and filler opening communicate, and reduce the pressure of oil outlet, protect other component internal rotors 3 and external rotor 2.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an inside engaged gear formula oil transfer pump, it is characterized in that: comprise external rotor (2), internal rotor (3), the pump housing (4), thrust plate (5) and cover of feed pump (7), the described pump housing (4) central authorities are provided with cavity, described thrust plate (5) central authorities are provided with manhole, the bilateral symmetry of manhole is provided with a pair circular arc through hole, the inside of described cover of feed pump (7) is provided with outlet valve (20) and Decompression valves (21), described outlet valve (20) and Decompression valves (21) are a pair relative circular shape on the cross section of cover of feed pump (7) bottom surface,
An end face of the described pump housing (4) and described thrust plate (5) seal fixing, another end face and described cover of feed pump (7) seal fixing, described external rotor (2) and described internal rotor (3) are arranged in the inner cavity of the pump housing (4) and also fix with stationary axle respectively, described external rotor (2) drives internal rotor (3) to rotate by stationary axle, and two cavitys between described external rotor (2) and internal rotor (3) are communicated with the arc-shaped through hole on thrust plate (5) with the shoulder hole on described cover of feed pump (7) respectively;
Described outlet valve (20) comprises little guide pin bushing (12), safety check (11), the first spring (10) and screw (8);
The outer wall of described outlet valve (20) is for being arranged at the first inner shoulder hole of cover of feed pump (7), filler opening (22) is provided with at the bottom of the hole of described first shoulder hole, the top of described filler opening (22) is provided with the little guide pin bushing (12) fixing with the hole wall of the first shoulder hole, the top of described little guide pin bushing (12) is provided with safety check (11), described safety check (11) is fixedly connected with one end of described first spring (10), the other end of described first spring (10) and the hole wall of described first shoulder hole are fixed, described screw (8) and the aperture place of described first shoulder hole seal fixing, the below of described screw (8) is provided with oil outlet (23).
2. inside engaged gear formula oil transfer pump according to claim 1, is characterized in that: be also provided with the first gasket seal (9) between the aperture of described screw (8) and described first shoulder hole.
3. inside engaged gear formula oil transfer pump according to claim 1, it is characterized in that: described Decompression valves (21) comprises large guide pin bushing (19), steel ball (18), second spring (17), back-up ring (16), adjustment pad (15) and adjusting screw (13);
The outer wall of described Decompression valves (21) is for being arranged at the second inner shoulder hole of cover of feed pump (7), oil outlet (23) is provided with at the bottom of the hole of described second shoulder hole, the top of described oil outlet (23) is provided with the large guide pin bushing (19) fixing with the hole wall of described second shoulder hole, the top of described large guide pin bushing (19) is disposed with steel ball (18), second spring (17), back-up ring (16) and adjustment pad (15), described steel ball (18) and one end of described second spring (17) extrude fixing, the other end of described second spring (17) and the inwall of described second shoulder hole are fixed, described back-up ring (16) is fixed on the inwall of described second shoulder hole, described adjusting screw (13) and the aperture place of described second shoulder hole seal fixing, the below of described adjusting screw (13) is provided with filler opening (22).
4. inside engaged gear formula oil transfer pump according to claim 3, is characterized in that: be provided with the second gasket seal (14) between the eating dishes without rice or wine of described adjusting screw (13) and described second shoulder hole.
5. inside engaged gear formula oil transfer pump according to claim 1, is characterized in that: be provided with the first seal ring (1) between the described pump housing (4) and described cover of feed pump (7).
6. inside engaged gear formula oil transfer pump according to claim 1, is characterized in that: be provided with the second seal ring (6) between the described pump housing (4) and described thrust plate (5).
7., according to the arbitrary described inside engaged gear formula oil transfer pump of claim 1 to 6, it is characterized in that: the edge of described external rotor (2) is provided with seven magnetic poles.
8., according to the arbitrary described inside engaged gear formula oil transfer pump of claim 1 to 6, it is characterized in that: the edge of described internal rotor (3) is provided with six magnetic poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310213157.8A CN103256218B (en) | 2013-05-31 | 2013-05-31 | A kind of inside engaged gear formula oil transfer pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310213157.8A CN103256218B (en) | 2013-05-31 | 2013-05-31 | A kind of inside engaged gear formula oil transfer pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103256218A CN103256218A (en) | 2013-08-21 |
| CN103256218B true CN103256218B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310213157.8A Expired - Fee Related CN103256218B (en) | 2013-05-31 | 2013-05-31 | A kind of inside engaged gear formula oil transfer pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103256218B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201111554Y (en) * | 2007-05-28 | 2008-09-10 | 湖南机油泵股份有限公司 | Valve base ring oil transfer pump |
| CN101319671A (en) * | 2008-07-10 | 2008-12-10 | 陈杰余 | Engine oil pump with pressure-limiting valve |
| CN203308704U (en) * | 2013-05-31 | 2013-11-27 | 龙口龙泵燃油喷射有限公司 | Inside engaged gear type oil delivery pump |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5476374A (en) * | 1994-12-01 | 1995-12-19 | Langreck; Gerald K. | Axially ported variable volume gerotor pump technology |
| US6102684A (en) * | 1998-09-14 | 2000-08-15 | Walbro Corporation | Cavitation noise abatement in a positive displacement fuel pump |
-
2013
- 2013-05-31 CN CN201310213157.8A patent/CN103256218B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201111554Y (en) * | 2007-05-28 | 2008-09-10 | 湖南机油泵股份有限公司 | Valve base ring oil transfer pump |
| CN101319671A (en) * | 2008-07-10 | 2008-12-10 | 陈杰余 | Engine oil pump with pressure-limiting valve |
| CN203308704U (en) * | 2013-05-31 | 2013-11-27 | 龙口龙泵燃油喷射有限公司 | Inside engaged gear type oil delivery pump |
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| Publication number | Publication date |
|---|---|
| CN103256218A (en) | 2013-08-21 |
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Effective date of registration: 20181010 Address after: 265718 Shandong Longkou City high tech Industrial Park Patentee after: LONGKOU LONGBENG DIESEL OIL INJECTION HIGH-TECH Co.,Ltd. Address before: 265700 1 Riverside Road, Longkou street, Longkou, Yantai, Shandong Patentee before: LONGKOU LONGBENG FUEL INJECTION Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 |
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| CF01 | Termination of patent right due to non-payment of annual fee |