CN103759120B - A kind of lubricating oil pump with pressure limiting valve - Google Patents

A kind of lubricating oil pump with pressure limiting valve Download PDF

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Publication number
CN103759120B
CN103759120B CN201410007011.2A CN201410007011A CN103759120B CN 103759120 B CN103759120 B CN 103759120B CN 201410007011 A CN201410007011 A CN 201410007011A CN 103759120 B CN103759120 B CN 103759120B
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CN
China
Prior art keywords
oil
pressure
pump
limiting valve
pressure limiting
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Application number
CN201410007011.2A
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Chinese (zh)
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CN103759120A (en
Inventor
陈杰余
张利华
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陈锐志
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Priority to CN201410007011.2A priority Critical patent/CN103759120B/en
Publication of CN103759120A publication Critical patent/CN103759120A/en
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Publication of CN103759120B publication Critical patent/CN103759120B/en

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Abstract

The invention discloses a kind of lubricating oil pump with pressure limiting valve, including pump cover, the pump housing, internal rotor, outer rotor, central shaft and valve plate, described lubricating oil pump also includes pressure limiting valve, what described pressure limiting valve included moving forward and backward regulates device, is arranged at the elastic device of described adjustment device one end and is arranged at the bascule of described elastic device one end, described bascule is arranged at the one end of the communicating passage being connected with high-voltage oil cavity, is additionally provided with pressure release hydraulic fluid port on the sidewall of described pressure limiting valve.Due to the fact that in the pump housing, be additionally arranged pressure limiting valve, the import of pressure limiting valve is connected with the high-voltage oil cavity of valve plate, therefore, pressure limiting valve can be utilized to set a pressure limiting to lubricating oil pump, when lubricating oil pump high-voltage oil cavity pressure is beyond pressure limiting, bascule in pressure limiting valve automatically opens up, and plays the effect of automatic overflow release.

Description

A kind of lubricating oil pump with pressure limiting valve
Technical field
The present invention relates to a kind of engine oil pump of internal combustion engine, the particularly lubricating oil pump with pressure limiting valve.
Background technology
Existing lubricating oil pump is spoken structure and is divided into two big classes, and the first kind is split superposition mode, and valve plate is arranged on pump case, and pump cover superposed type is connected on pump housing opening end face;Equations of The Second Kind is integral embedded type structure, and their structure is: engine oil pump of internal combustion engine includes pump case, internal rotor, outer rotor, axle and pump cover, and internal rotor is positioned at outer rotor and is fixed on axle.Such as a kind of internal messing cycloid gear pump that the patent No. is ZL00216717.4, the patent No. is the inlaid type machine-oil pump of ZL99230168.8, and the patent No. is the oil pump with built-in pump cover etc. of ZL99230124.6.In such an embodiment, pump cover surface, slightly above pump case end face, just defines the positioning boss that lubricating oil pump is installed, in actual use, it has been found that have the installation bolt hole of minority pump to have permeability phenomenon.
Inlaid type machine-oil pump valve plate is arranged on pump cover, and pump cover is embedded to be connected in pump case opening end face, and the lubricating oil pump of integral embedded type structure solves that the lubricating oil pump leakage of oil of split superposition mode is serious, pump the problem that pressure is low.But, in use, it has been found that the lubricating oil pump of integral embedded type structure, when main frame machine oil cold conditions operates, often causes because engine oil viscosity is big lubricating oil pump to pump hypertonia, occurs damaging the phenomenon of the oil duct adnexaes such as oil gauge, oil pipe, sealing member.
Summary of the invention
The purpose of this part is in that some aspects of general introduction embodiments of the invention and briefly introduces some preferred embodiments.Make a summary in this part and the description of the present application and denomination of invention may be done a little simplification or omit to avoid making the purpose of this part, specification digest and denomination of invention to obscure, and this simplification or omission cannot be used for restriction the scope of the present invention.
In view of Problems existing in above-mentioned and/or existing lubricating oil pump with pressure limiting valve and application, it is proposed that the present invention.
Therefore, it is an object of the present invention to provide a kind of lubricating oil pump with pressure limiting valve, it according to the pressure of the oil at lubricating oil pump oil-out place, can be adjusted and control within the specific limits, and automatic overflow release, to protect oil circuit adnexa damage.
nullFor solving above-mentioned technical problem,The technical scheme is that a kind of lubricating oil pump with pressure limiting valve,Including pump cover、The pump housing、Internal rotor、Outer rotor、Central shaft and valve plate,The flank profil of described internal rotor and described outer rotor is cycloid,Internal rotor is positioned at inside outer rotor,And be arranged on described central shaft,Described pump cover is the dish type in inner concavity,Described valve plate embeds and is arranged at the opening part of described pump cover,One end of described central shaft is enclosed within the centre bore of described valve plate,Described lubricating oil pump also includes pressure limiting valve,Described pressure limiting valve includes the adjustment device that can move forward and backward、It is arranged at the elastic device of described adjustment device one end and is arranged at the bascule of described elastic device one end,Described bascule is arranged at the one end of the communicating passage being connected with high-voltage oil cavity,The sidewall of described pressure limiting valve is additionally provided with pressure release hydraulic fluid port;When the oil pressure at oil-out place is less than or equal to when limiting oil pressure, communicating passage blocked by bascule, and the oil in high-voltage oil cavity all flows to oil-out, and now the elastic force of elastic device is equal to the power put on described bascule limiting oil pressure;When the oil pressure of oil port is more than when limiting oil pressure, bascule is extruded in pressure limiting valve, the oil of partial high pressure oil pocket flows into pressure limiting valve, and spilt out by the pressure release hydraulic fluid port on pressure limiting valve, reducing the pressure within high-voltage oil cavity, now the elastic force of elastic device puts on the power on described bascule equal to inside high-voltage oil cavity;Hereafter, when being decreased to restriction oil pressure inside high-voltage oil cavity, elastic device automatically resets, and blocks communicating passage, lubricating oil pump normal operation.
As a kind of preferred version of the lubricating oil pump with pressure limiting valve of the present invention, wherein: have certain eccentric throw between described internal rotor and described outer rotor, and be arranged at inside described pump cover.
As a kind of preferred version of the lubricating oil pump with pressure limiting valve of the present invention, wherein: the opening of the described pump housing has the positioning boss of and internal-combustion engine mates location.
As a kind of preferred version of the lubricating oil pump with pressure limiting 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 lubricating oil pump with pressure limiting valve of the present invention, wherein: described pump cover is provided with a plurality of trip bolt, described a plurality of trip bolt is arranged on concentric circular, and angle≤120 ° of the two of air line distance lie farthest away trip bolts and described concentric circular circle center line connecting;
As a kind of preferred version of the lubricating oil pump with pressure limiting valve of the present invention, wherein: on described pump cover, be additionally provided with mass screw, a nut part for described mass 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 lubricating oil pump with pressure limiting valve of the present invention, wherein: described elastic device is spring.
As a kind of preferred version of the lubricating oil pump with pressure limiting valve of the present invention, wherein: described bascule is balanced ball.
As a kind of preferred version of the lubricating oil pump with pressure limiting valve of the present invention, wherein: described adjustment device is adjusting nut.
Due to the fact that in the pump housing, be additionally arranged pressure limiting valve, the import of pressure limiting valve is connected with the high-voltage oil cavity of valve plate, therefore, pressure limiting valve can be utilized to set a pressure limiting to lubricating oil pump, when lubricating oil pump high-voltage oil cavity pressure is beyond pressure limiting, bascule in pressure limiting valve automatically opens up, and plays the effect of automatic overflow release.Owing to lubricating oil pump sets pressure limiting, thus without occurring damaging the phenomenon of the oil duct adnexaes such as oil gauge, oil pipe, sealing member owing to pumping hypertonia.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below the accompanying drawing used required 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 skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.Wherein:
Fig. 1 is the lubricating oil pump with pressure limiting valve of the present invention A-A in one embodiment to cross-sectional schematic;
Fig. 2 is the schematic top plan view of the embodiment illustrated in fig. 1 lubricating oil pump with pressure limiting valve.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with specific embodiment, the specific embodiment of the present invention is described in detail.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but the present invention can also adopt other to be different from alternate manner described here to be implemented, those skilled in the art can do similar popularization when without prejudice to intension of the present invention, and therefore the present invention is not by the restriction of following public specific embodiment.
Secondly, " embodiment " or " embodiment " referred to herein refers to the special characteristic, structure or the characteristic that may be included at least one implementation of the present invention.Different local in this manual " in one embodiment " occurred not refer both to same embodiment, neither be independent or selective and that other embodiments are mutually exclusive embodiment.
Embodiment 1
As shown in Figure 1, in this embodiment, a kind of lubricating oil pump with pressure limiting valve, including pump cover 6, the pump housing 7, internal rotor 9, outer rotor 8, central shaft 10 and valve plate, the flank profil of internal rotor 9 and outer rotor 8 is cycloid, and it is internal that internal rotor 9 is positioned at outer rotor 8, and it is arranged on central shaft 10, pump cover 6 is the dish type in inner concavity, and valve plate embeds and be arranged at the opening part of described pump cover 6, and one end of described central shaft 10 is enclosed within the centre bore of described valve plate.
Referring to Fig. 1, in the present embodiment, lubricating oil pump also includes pressure limiting valve, and pressure limiting valve includes moving forward and backward regulates device 1, be arranged at the elastic device 2 of described adjustment device 1 one end and be arranged at the bascule 3 of described elastic device 2 one end, described bascule 3 is arranged at the one end of the communicating passage 5 being connected with high-voltage oil cavity 11, is additionally provided with pressure release hydraulic fluid port 4 on the sidewall of described pressure limiting valve;This pressure limiting valve connection high-voltage oil cavity 11, the pressure of oil-out place oil is exactly the pressure in high-voltage oil cavity 11.
When the oil pressure at oil-out place is less than or equal to when limiting oil pressure, communicating passage 5 blocked by bascule 3, and the oil in high-voltage oil cavity 11 all flows to oil-out, and now the elastic force of elastic device 2 is equal to the power put on described bascule 3 limiting oil pressure;When the oil pressure of oil port is more than when limiting oil pressure, bascule 3 is extruded in pressure limiting valve, the oil of partial high pressure oil pocket 11 flows into pressure limiting valve, and spilt out by the pressure release hydraulic fluid port 4 on pressure limiting valve, reducing the pressure within high-voltage oil cavity 11, now the elastic force of elastic device 2 is internal equal to high-voltage oil cavity 11 puts on the power on described bascule 3;Hereafter, when high-voltage oil cavity 11 inside is decreased to restriction oil pressure, elastic device 2 automatically resets, and blocks communicating passage 5, lubricating oil pump normal operation.
Embodiment 2
As depicted in figs. 1 and 2, a kind of engine oil pump of internal combustion engine, it is made up of pump cover 6, the pump housing 7, internal rotor 9, outer rotor 8, central shaft 10 and valve plate, the flank profil of inner and outer Rotator 8 is cycloid, internal rotor 9 is positioned at outer rotor 8, and fix on the center shaft 10, certain eccentric throw is had between inner and outer Rotator 8, and it is contained in pump cover 6, the pump cover 6 dish type in inner concavity, the opening of the pump housing 7 has a positioning boss, and valve plate embeds and be fixed on pump cover 6 opening part, plane valving surface is slightly below positioning boss surface, and one end of central shaft 10 is enclosed within valve plate centre bore.Lubricating oil pump also includes pressure limiting valve, and pressure limiting valve includes moving forward and backward regulates device 1, be arranged at the elastic device 2 of described adjustment device 1 one end and be arranged at the bascule 3 of described elastic device 2 one end, described bascule 3 is arranged at the one end of the communicating passage 5 being connected with high-voltage oil cavity 11, is additionally provided with pressure release hydraulic fluid port 4 on the sidewall of described pressure limiting valve;When the oil pressure at oil-out place is less than or equal to when limiting oil pressure, communicating passage 5 blocked by bascule 3, and the oil in high-voltage oil cavity 11 all flows to oil-out, and now the elastic force of elastic device 2 is equal to the power put on described bascule 3 limiting oil pressure;When the oil pressure of oil port is more than when limiting oil pressure, bascule 3 is extruded in pressure limiting valve, the oil of partial high pressure oil pocket 11 flows into pressure limiting valve, and spilt out by the pressure release hydraulic fluid port 4 on pressure limiting valve, reducing the pressure within high-voltage oil cavity 11, now the elastic force of elastic device 2 is internal equal to high-voltage oil cavity 11 puts on the power on described bascule 3;Hereafter, when high-voltage oil cavity 11 inside is decreased to restriction oil pressure, elastic device 2 automatically resets, and blocks communicating passage 5, lubricating oil pump normal operation.In this embodiment, described elastic device 2 is spring;Described bascule 3 is balanced ball;Described adjustment device 1 is adjusting nut.
In this embodiment, pump cover 6 is provided with two trip bolts 12, trip bolt 12 is arranged on concentric circular, and angle≤120 ° of the two of air line distance lie farthest away trip bolts 12 and described concentric circular circle center line connecting, pump cover 6 is provided with First terrace, and the pump housing 7 is provided with second step face, as it is shown in figure 1, second step face is lower than First terrace;Being additionally provided with mass screw 13 on pump cover 6, a nut part for described mass screw 13 is arranged on described First terrace, and its bolt is arranged in the pump housing 7;Mass screw 13 and trip bolt 12 are arranged on same concentric circular, and mass screw 13 is arranged at the center of the passed major arc of two trip bolts 12 of described air line distance lie farthest away.So, only half is on pump cover 6 for mass screw 13, and second half is located on the pump housing 7, but the step on the pump housing 7 is more lower than the step on pump cover 6 so that when tightening mass screw 13, the pressure of this screw is totally absorbed on pump cover 6, the pump housing 7 is then unaffected, it is ensured that the safe handling of pump.If screw is pressed onto the pump housing 7 can affect the rotation of rotor.
In fact, the principle of present lubricating oil pump is that oil enters the pump housing 7 inside from low pressure chamber, when internal rotor 9 turns to and engages space with low pressure chamber, oil enters engagement space, this engagement space is rotated further by when engaging with high-voltage oil cavity 11, and oil enters in high-voltage oil cavity 11, then from the outside fuel feeding of high-voltage oil cavity 11.The imbalance of the installation site of trip bolt 12 makes the pump cover 6 of its compression under pressure outside in vibrations for a long time and pump, the side not having screw can be made outwards to tilt, gap between pump cover 6 and the pump housing 7 increases, and the sealing property ultimately resulting in whole lubricating oil pump reduces.In this embodiment, if arranging the words of the screw on the pump cover 6 on the two trip bolt 12 opposite again, although as can so that pump cover 6 upper pressure balance, but excessive screw hole can make the high-voltage oil cavity 11 in pump connect with low pressure chamber so that whole lubricating oil pump cannot work.Therefore, mass screw 13 only half in the present invention is on pump cover 6, second half is located on the pump housing 7, but the step on the pump housing 7 is more lower than the step on pump cover 6, make when tightening mass screw 13, the pressure of this screw is totally absorbed on pump cover 6, and the pump housing 7 is then unaffected, it is ensured that the safe handling of pump.
It should be noted that, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent replacement, without deviating from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention.

Claims (6)

1. the lubricating oil pump with pressure limiting valve, including pump cover, the pump housing, internal rotor, outer rotor, central shaft and valve plate, the flank profil of described internal rotor and described outer rotor is cycloid, internal rotor is positioned at inside outer rotor, and it being arranged on described central shaft, described pump cover is the dish type in inner concavity, and described valve plate embeds and be arranged at the opening part of described pump cover, one end of described central shaft is enclosed within the centre bore of described valve plate, it is characterised in that:
Described lubricating oil pump also includes pressure limiting valve, what described pressure limiting valve included moving forward and backward regulates device, is arranged at the elastic device of described adjustment device one end and is arranged at the bascule of described elastic device one end, described bascule is arranged at the one end of the communicating passage being connected with high-voltage oil cavity, is additionally provided with pressure release hydraulic fluid port on the sidewall of described pressure limiting valve;
When the oil pressure at oil-out place is less than or equal to when limiting oil pressure, communicating passage blocked by bascule, and the oil in high-voltage oil cavity all flows to oil-out, and now the elastic force of elastic device is equal to the power put on described bascule limiting oil pressure;
When the oil pressure at oil-out place is more than when limiting oil pressure, bascule is extruded in pressure limiting valve, the oil of partial high pressure oil pocket flows into pressure limiting valve, and spilt out by the pressure release hydraulic fluid port on pressure limiting valve, reducing the pressure within high-voltage oil cavity, now the elastic force of elastic device puts on the power on described bascule equal to inside high-voltage oil cavity;Hereafter, when being decreased to restriction oil pressure inside high-voltage oil cavity, elastic device automatically resets, block communicating passage, lubricating oil pump normal operation, described pump cover is provided with First terrace, the described pump housing is provided with second step face, described second step face is lower than First terrace, described pump cover is provided with two trip bolts, described pump cover is additionally provided with mass screw, described mass screw and two trip bolts are arranged on concentric circular, angle≤120 ° of said two trip bolt and described concentric circular circle center line connecting, described mass screw is arranged at the center of two passed major arcs of trip bolt, a nut part for described mass screw is arranged on described First terrace, its bolt is arranged in the described pump housing.
2. the lubricating oil pump with pressure limiting valve according to claim 1, it is characterised in that: there is certain eccentric throw between described internal rotor and described outer rotor, and be arranged at inside described pump cover.
3. the lubricating oil pump with pressure limiting valve according to claim 1, it is characterised in that: the opening of the described pump housing has the positioning boss of and internal-combustion engine mates location.
4. the lubricating oil pump with pressure limiting valve according to claim 1, it is characterised in that: described elastic device is spring.
5. the lubricating oil pump with pressure limiting valve according to claim 1, it is characterised in that: described bascule is balanced ball.
6. the lubricating oil pump with pressure limiting valve according to claim 1, it is characterised in that: described adjustment device is adjusting nut.
CN201410007011.2A 2014-01-07 2014-01-07 A kind of lubricating oil pump with pressure limiting valve CN103759120B (en)

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

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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

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CN103759120B true CN103759120B (en) 2016-07-06

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* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 Engine oil pump with pressure-limiting valve
CN203718353U (en) * 2014-01-07 2014-07-16 陈锐志 Oil pump with pressure limiting valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
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 Engine oil pump with pressure-limiting valve
CN203718353U (en) * 2014-01-07 2014-07-16 陈锐志 Oil pump with pressure limiting valve

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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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