CN103759120A - Oil pump with pressure limiting valve - Google Patents
Oil pump with pressure limiting valve Download PDFInfo
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- CN103759120A CN103759120A CN201410007011.2A CN201410007011A CN103759120A CN 103759120 A CN103759120 A CN 103759120A CN 201410007011 A CN201410007011 A CN 201410007011A CN 103759120 A CN103759120 A CN 103759120A
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- pressure
- oil
- pump
- limit valve
- oil pump
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- 239000012530 fluid Substances 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 110
- 239000010705 motor oil Substances 0.000 description 4
- 239000010721 machine oil Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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- Rotary Pumps (AREA)
Abstract
The invention discloses an oil pump with a pressure limiting valve. The oil pump with the pressure limiting pump comprises a pump cover, a pump body, an inner rotor, an outer rotor, a center shaft, a valve plate and the pressure limiting valve, wherein the pressure limiting valve comprises an adjusting device, an elastic device and a balancing device; the adjusting device can move in the front-back direction; the elastic device is arranged at one end of the adjusting device; the balancing device is arranged at one end of the elastic device, and is arranged at one end of a connecting channel which is connected with a high-pressure oil cavity; and a pressure relief oil opening is also formed in a side wall of the pressure limiting valve. The pressure limiting valve is arranged in the pump body, and an inlet of the pressure limiting valve is connected with the high-pressure oil cavity of the valve plate, so that limited pressure can be set for the oil pump by using the pressure limiting valve; and when the pressure of the high-pressure oil cavity of the oil pump exceeds the limited pressure, the balancing device in the pressure limiting valve can be started automatically, and an automatic overflow pressure relief effect can be achieved.
Description
Technical field
The present invention relates to a kind of engine oil pump of internal combustion engine, particularly with the oil pump of pressure-limit valve.
Background technique
Existing oil pump is spoken and is divided into two large classes from structure, and the first kind is split superposition mode, and thrust plate is arranged on pump case, and pump cover superposed type is connected on pump housing opening end end face; Equations of The Second Kind is integral embedded type structure, and their structure is: engine oil pump of internal combustion engine comprises pump case, internal rotor, external rotor, axle and pump cover, and internal rotor is positioned at external rotor and is fixed on axle.As the patent No. be ZL00216717.4 a kind of interior engagement cycloid gear pump, the inlaid type machine-oil pump that the patent No. is ZL99230168.8, oil pump with built-in pump cover that the patent No. is ZL99230124.6 etc.In this structure, pump cover surface, a little more than pump case end face, has just in time formed the positioning boss that oil pump is installed, and in actual use, there is oil impregnate phenomenon in the construction bolt hole that we find that there is minority pump.
Inlaid type machine-oil pump thrust plate is arranged on pump cover, and pump cover is embedded to be connected in pump case opening end end face, the oil pump of integral embedded type structure solved the oil pump leakage of oil of split superposition mode serious, pump the problem that pressure is low.Yet in use, we find that the oil pump of integral embedded type structure is when main frame machine oil cold conditions turns round, often because engine oil viscosity causes oil pump to pump overpressure greatly, there is damaging the phenomenon of the oil duct annexes such as oil pressure gauge, oil pipe, Sealing.
Summary of the invention
The object of this part is to summarize some aspects of embodiments of the invention and briefly introduces some preferred embodiments.In this part and the application's specification digest and denomination of invention, may do a little simplification or omit to avoid the making object of this part, specification digest and denomination of invention fuzzy, and this simplification or omit can not be for limiting the scope of the invention.
Problem in view of existing in the above-mentioned and/or existing oil pump with pressure-limit valve and application, has proposed the present invention.
Therefore, an object of the present invention is to provide a kind of oil pump with pressure-limit valve, it can be adjusted and control within the specific limits according to the oily pressure at oil pump oil outlet place, and automatic overflow release, to protect oil circuit annex to avoid destroying.
For solving the problems of the technologies described above, the invention provides following technological scheme: a kind of oil pump with pressure-limit valve, comprise pump cover, the pump housing, internal rotor, external rotor, central shaft and thrust plate, the flank profil of described internal rotor and described external rotor is cycloid, internal rotor is positioned at external rotor inside, and be arranged on described central shaft, described pump cover is the dish type that is inner concavity, described thrust plate embeds and is arranged at the opening of described pump cover, one end of described central shaft is enclosed within the center hole of described thrust plate, described oil pump also comprises pressure-limit valve, described pressure-limit valve comprises the controlling device that can move forward and backward, be arranged at the elastic device of described controlling device one end and the Equilibrator that is arranged at described elastic device one end, described Equilibrator is arranged at one end of the communicating passage being connected with high-voltage oil cavity, on the sidewall of described pressure-limit valve, be also provided with pressure release hydraulic fluid port, when the oil pressure at oil outlet place is less than or equal to restriction oil pressure, Equilibrator is blocked communicating passage, and the oil in high-voltage oil cavity all flows to oil outlet, and now the elastic force of elastic device equals to limit the power on the described Equilibrator of putting on of oil pressure, when the oil pressure of oil port is greater than restriction oil pressure, the squeezed pressure-limit valve of compressing into of Equilibrator, the oil of part high-voltage oil cavity flows into pressure-limit valve, and spill out by the pressure release hydraulic fluid port on pressure-limit valve, reduced the pressure of high-voltage oil cavity inside, now the elastic force of elastic device equals high-voltage oil cavity inside and puts on the power on described Equilibrator, after this, when high-voltage oil cavity inside is decreased to restriction oil pressure, elastic device automatically resets, and blocks communicating passage, and oil pump is normally worked.
As a kind of preferred version of the oil pump with pressure-limit valve of the present invention, wherein: have certain throw of eccentric between described internal rotor and described external rotor, and it is inner to be arranged at described pump cover.
As a kind of preferred version of the oil pump with pressure-limit valve of the present invention, wherein: the opening end of the described pump housing has the positioning boss of the location of matching with internal combustion (IC) engine airframe.
As a kind of preferred version of the oil pump with pressure-limit valve of the present invention, wherein: described pump cover is provided with First terrace, the described pump housing is provided with second step face, and described second step face is lower than described First terrace.
A kind of preferred version as the oil pump with pressure-limit valve of the present invention, wherein: on described pump cover, be provided with a plurality of fastening screw trip bolts, described a plurality of fastening screw trip bolt is arranged on concentric circle, and crow flight distance is at a distance of two fastening screw trip bolts farthest and angle≤120 ° of described concentric circle circle center line connecting;
As a kind of preferred version of the oil pump with pressure-limit valve of the present invention, wherein: be also provided with balance screw on described pump cover, a nut part for described balance screw is arranged on described First terrace, and its bolt is arranged in the described pump housing.
As a kind of preferred version of the oil pump with pressure-limit valve of the present invention, wherein: described elastic device is spring.
As a kind of preferred version of the oil pump with pressure-limit valve of the present invention, wherein: described Equilibrator is balanced ball.
As a kind of preferred version of the oil pump with pressure-limit valve of the present invention, wherein: described controlling device is adjusting nut.
The present invention is owing to having set up pressure-limit valve in the pump housing, the import of pressure-limit valve is connected with the high-voltage oil cavity of thrust plate, therefore, can utilize pressure-limit valve to set a pressure limiting to oil pump, when oil pump high-voltage oil cavity pressure exceeds pressure limiting, Equilibrator in pressure-limit valve is opened automatically, plays the effect of automatic overflow release.Therefore because oil pump has been set pressure limiting, there will not be due to the phenomenon that pumps overpressure and damage the oil duct annexes such as oil pressure gauge, oil pipe, Sealing.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.Wherein:
Fig. 1 is that the oil pump with pressure-limit valve of the present invention A-A is in one embodiment to cross-sectional schematic;
Fig. 2 is the schematic top plan view of the oil pump with pressure-limit valve embodiment illustrated in fig. 1.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with specific embodiment, the specific embodiment of the present invention is described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization without prejudice to intension of the present invention in the situation that, so the present invention is not subject to the restriction of following public specific embodiment.
Secondly, alleged " embodiment " or " embodiment " refers to special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention herein.Different local in this manual " in one embodiment " that occur not all refer to same embodiment, neither be independent or the embodiment mutually exclusive with other embodiments optionally.
Embodiment 1
As shown in Figure 1, in this embodiment, a kind of oil pump with pressure-limit valve, comprised pump cover 6, the pump housing 7, internal rotor 9, external rotor 8, central shaft 10 and thrust plate, the flank profil of internal rotor 9 and external rotor 8 is cycloid, and internal rotor 9 is positioned at external rotor 8 inside, and be arranged on central shaft 10, pump cover 6 is for being the dish type of inner concavity, and thrust plate embeds and be arranged at the opening of described pump cover 6, and one end of described central shaft 10 is enclosed within the center hole of described thrust plate.
Referring to Fig. 1, in the present embodiment, oil pump also comprises pressure-limit valve, and pressure-limit valve comprises the controlling device 1 that can move forward and backward, is arranged at the elastic device 2 of described controlling device 1 one end and the Equilibrator 3 that is arranged at described elastic device 2 one end, described Equilibrator 3 is arranged at one end of the communicating passage 5 being connected with high-voltage oil cavity 11, is also provided with pressure release hydraulic fluid port 4 on the sidewall of described pressure-limit valve; This pressure-limit valve is communicated with high-voltage oil cavity 11, and the pressure of oil outlet place oil is exactly the pressure in high-voltage oil cavity 11.
When the oil pressure at oil outlet place is less than or equal to restriction oil pressure, Equilibrator 3 is blocked communicating passage 5, and the oil in high-voltage oil cavity 11 all flows to oil outlet, and now the elastic force of elastic device 2 equals to limit the power on the described Equilibrator 3 of putting on of oil pressure; When the oil pressure of oil port is greater than restriction oil pressure, the squeezed pressure-limit valve of compressing into of Equilibrator 3, the oil of part high-voltage oil cavity 11 flows into pressure-limit valve, and spill out by the pressure release hydraulic fluid port 4 on pressure-limit valve, reduced the pressure of high-voltage oil cavity 11 inside, now the elastic force of elastic device 2 equals high-voltage oil cavity 11 inside and puts on the power on described Equilibrator 3; After this, when high-voltage oil cavity 11 inside are decreased to restriction oil pressure, elastic device 2 automatically resets, and blocks communicating passage 5, and oil pump is normally worked.
As depicted in figs. 1 and 2, a kind of engine oil pump of internal combustion engine, it is comprised of pump cover 6, the pump housing 7, internal rotor 9, external rotor 8, central shaft 10 and thrust plate, the flank profil of inner and outer Rotator 8 is cycloid, internal rotor 9 is positioned at external rotor 8, and be fixed on central shaft 10, between inner and outer Rotator 8, there is certain throw of eccentric, and be contained in pump cover 6, pump cover 6 is the dish type of inner concavity, and the opening end of the pump housing 7 has a positioning boss, and thrust plate embeds and be fixed on pump cover 6 openings, plane valving surface is a little less than positioning boss surface, and one end of central shaft 10 is enclosed within thrust plate center hole.Oil pump also comprises pressure-limit valve, and pressure-limit valve comprises the controlling device 1 that can move forward and backward, is arranged at the elastic device 2 of described controlling device 1 one end and the Equilibrator 3 that is arranged at described elastic device 2 one end, described Equilibrator 3 is arranged at one end of the communicating passage 5 being connected with high-voltage oil cavity 11, is also provided with pressure release hydraulic fluid port 4 on the sidewall of described pressure-limit valve; When the oil pressure at oil outlet place is less than or equal to restriction oil pressure, Equilibrator 3 is blocked communicating passage 5, and the oil in high-voltage oil cavity 11 all flows to oil outlet, and now the elastic force of elastic device 2 equals to limit the power on the described Equilibrator 3 of putting on of oil pressure; When the oil pressure of oil port is greater than restriction oil pressure, the squeezed pressure-limit valve of compressing into of Equilibrator 3, the oil of part high-voltage oil cavity 11 flows into pressure-limit valve, and spill out by the pressure release hydraulic fluid port 4 on pressure-limit valve, reduced the pressure of high-voltage oil cavity 11 inside, now the elastic force of elastic device 2 equals high-voltage oil cavity 11 inside and puts on the power on described Equilibrator 3; After this, when high-voltage oil cavity 11 inside are decreased to restriction oil pressure, elastic device 2 automatically resets, and blocks communicating passage 5, and oil pump is normally worked.In this embodiment, described elastic device 2 is spring; Described Equilibrator 3 is balanced ball; Described controlling device 1 is adjusting nut.
In this embodiment, on pump cover 6, be provided with two fastening screw trip bolts 12, fastening screw trip bolt 12 is arranged on concentric circle, and crow flight distance is angle≤120 ° with described concentric circle circle center line connecting at a distance of two fastening screw trip bolts 12 farthest, on pump cover 6, be provided with First terrace, and the pump housing 7 is provided with second step face, as shown in Figure 1, second step face is lower than First terrace; On pump cover 6, be also provided with balance screw 13, a nut part for described balance screw 13 is arranged on described First terrace, and its bolt is arranged in the pump housing 7; Balance screw 13 is arranged on same concentric circle with fastening screw trip bolt 12, and balance screw 13 is arranged at described crow flight distance at a distance of the central position of the major arc of 12 processes of two fastening screw trip bolts farthest.So, balance screw 13 only has half on pump cover 6, second half is located on the pump housing 7, but the step on the pump housing 7 is lower than the step on pump cover 6, make when tightening balance screw 13, the pressure of this screw concentrates on pump cover 6 completely, and 7 of the pump housings are unaffected, guaranteed the safe handling of pump.If screw is pressed onto the rotation that the pump housing 7 can affect rotor.
In fact, the principle of present oil pump is that oil enters the pump housing 7 inside from low-pressure cavity, at internal rotor 9, turn to low-pressure cavity and have engagement during space, oil enters engagement space, when this engagement space turns to high-voltage oil cavity 11 engagement again, oil enters in high-voltage oil cavity 11, then from the outside fuel feeding of high-voltage oil cavity 11.The pump cover 6 that the imbalance of the mounting point of fastening screw trip bolt 12 makes its compression is under the pressure through outside in vibrations and pump for a long time, can make not have the outer perk of a side direction of screw, gap between pump cover 6 and the pump housing 7 increases, and finally causes the sealability of whole oil pump to reduce.In this embodiment, if the words of the screw are set on the pump cover 6 on these two fastening screw trip bolt 12 opposites again, although seeming can be so that pump cover 6 upper pressure balance, but excessive screw hole but can make the high-voltage oil cavity 11 in pump be communicated with low-pressure cavity, thereby whole oil pump cannot be worked.Therefore, balance screw 13 in the present invention only has half on pump cover 6, second half is located on the pump housing 7, but the step on the pump housing 7 is lower than the step on pump cover 6, make when tightening balance screw 13, the pressure of this screw concentrates on pump cover 6 completely, and 7 of the pump housings are unaffected, guaranteed the safe handling of pump.
It should be noted that, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technological scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (9)
1. the oil pump with pressure-limit valve, comprise pump cover, the pump housing, internal rotor, external rotor, central shaft and thrust plate, the flank profil of described internal rotor and described external rotor is cycloid, internal rotor is positioned at external rotor inside, and be arranged on described central shaft, described pump cover is the dish type that is inner concavity, described thrust plate embeds and is arranged at the opening of described pump cover, one end of described central shaft is enclosed within the center hole of described thrust plate, it is characterized in that:
Described oil pump also comprises pressure-limit valve, described pressure-limit valve comprises the controlling device that can move forward and backward, is arranged at the elastic device of described controlling device one end and the Equilibrator that is arranged at described elastic device one end, described Equilibrator is arranged at one end of the communicating passage being connected with high-voltage oil cavity, is also provided with pressure release hydraulic fluid port on the sidewall of described pressure-limit valve;
When the oil pressure at oil outlet place is less than or equal to restriction oil pressure, Equilibrator is blocked communicating passage, and the oil in high-voltage oil cavity all flows to oil outlet, and now the elastic force of elastic device equals to limit the power on the described Equilibrator of putting on of oil pressure;
When the oil pressure of oil port is greater than restriction oil pressure, the squeezed pressure-limit valve of compressing into of Equilibrator, the oil of part high-voltage oil cavity flows into pressure-limit valve, and spill out by the pressure release hydraulic fluid port on pressure-limit valve, reduced the pressure of high-voltage oil cavity inside, now the elastic force of elastic device equals high-voltage oil cavity inside and puts on the power on described Equilibrator; After this, when high-voltage oil cavity inside is decreased to restriction oil pressure, elastic device automatically resets, and blocks communicating passage, and oil pump is normally worked.
2. the oil pump with pressure-limit valve according to claim 1, is characterized in that: between described internal rotor and described external rotor, have certain throw of eccentric, and it is inner to be arranged at described pump cover.
3. the oil pump with pressure-limit valve according to claim 1, is characterized in that: the opening end of the described pump housing has the positioning boss of the location of matching with internal combustion (IC) engine airframe.
4. the oil pump with pressure-limit valve according to claim 1, is characterized in that: described pump cover is provided with First terrace, and the described pump housing is provided with second step face, and described second step face is lower than described First terrace.
5. the oil pump with pressure-limit valve according to claim 1, it is characterized in that: on described pump cover, be provided with a plurality of fastening screw trip bolts, described a plurality of fastening screw trip bolt is arranged on concentric circle, and crow flight distance is at a distance of two fastening screw trip bolts farthest and angle≤120 ° of described concentric circle circle center line connecting;
6. the oil pump with pressure-limit valve according to claim 1, is characterized in that: on described pump cover, be also provided with balance screw, a nut part for described balance screw is arranged on described First terrace, and its bolt is arranged in the described pump housing.
7. the oil pump with pressure-limit valve according to claim 1, is characterized in that: described elastic device is spring.
8. the oil pump with pressure-limit valve according to claim 1, is characterized in that: described Equilibrator is balanced ball.
9. the oil pump with pressure-limit valve according to claim 1, is characterized in that: described controlling device is adjusting nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410007011.2A CN103759120B (en) | 2014-01-07 | 2014-01-07 | A kind of lubricating oil pump with pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410007011.2A CN103759120B (en) | 2014-01-07 | 2014-01-07 | A kind of lubricating oil pump with pressure limiting valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103759120A true CN103759120A (en) | 2014-04-30 |
| CN103759120B CN103759120B (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410007011.2A Active CN103759120B (en) | 2014-01-07 | 2014-01-07 | A kind of lubricating oil pump with pressure limiting valve |
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| Country | Link |
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| CN (1) | CN103759120B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156868A (en) * | 2015-09-30 | 2015-12-16 | 无锡惠山泵业有限公司 | Oil pump provided with pressure-limiting valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2413061Y (en) * | 2000-03-06 | 2001-01-03 | 陈杰余 | Inside engaged cycloidal gear pump |
| CN1563780A (en) * | 2004-03-24 | 2005-01-12 | 陈杰余 | Machine oil pump of I.C. engine |
| CN2698981Y (en) * | 2004-04-13 | 2005-05-11 | 陈杰余 | Engine oil pump cover of internal combustion |
| CN101319671A (en) * | 2008-07-10 | 2008-12-10 | 陈杰余 | Oil pump with pressure limiting valve |
| CN203718353U (en) * | 2014-01-07 | 2014-07-16 | 陈锐志 | Oil pump with pressure limiting valve |
-
2014
- 2014-01-07 CN CN201410007011.2A patent/CN103759120B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2413061Y (en) * | 2000-03-06 | 2001-01-03 | 陈杰余 | Inside engaged cycloidal gear pump |
| CN1563780A (en) * | 2004-03-24 | 2005-01-12 | 陈杰余 | Machine oil pump of I.C. engine |
| CN2698981Y (en) * | 2004-04-13 | 2005-05-11 | 陈杰余 | Engine oil pump cover of internal combustion |
| CN101319671A (en) * | 2008-07-10 | 2008-12-10 | 陈杰余 | Oil pump with pressure limiting valve |
| CN203718353U (en) * | 2014-01-07 | 2014-07-16 | 陈锐志 | Oil pump with pressure limiting valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156868A (en) * | 2015-09-30 | 2015-12-16 | 无锡惠山泵业有限公司 | Oil pump provided with pressure-limiting valve |
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| Publication number | Publication date |
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| CN103759120B (en) | 2016-07-06 |
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Effective date of registration: 20170605 Address after: 224100 No. 101 East Village Road, Dafeng, Jiangsu, Yancheng City Patentee after: Jiangsu true deer Technology Co., Ltd. Address before: 224100, Jiangsu deer science and Technology Co., Ltd., 1 Wuyi Road, Dafeng District, Dafeng, Jiangsu, Yancheng City Patentee before: Chen Ruizhi |
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Denomination of invention: Oil pump with pressure limiting valve Effective date of registration: 20210908 Granted publication date: 20160706 Pledgee: Jiangsu Jinmao Financing Guarantee Co.,Ltd. Pledgor: JIANGSU ZHENLU TECHNOLOGY Co.,Ltd. Registration number: Y2021980009071 |
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