CN110701041A - Electronic oil pump pressure relief structure - Google Patents

Electronic oil pump pressure relief structure Download PDF

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Publication number
CN110701041A
CN110701041A CN201911077033.5A CN201911077033A CN110701041A CN 110701041 A CN110701041 A CN 110701041A CN 201911077033 A CN201911077033 A CN 201911077033A CN 110701041 A CN110701041 A CN 110701041A
Authority
CN
China
Prior art keywords
pressure relief
valve
pressure
pump
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911077033.5A
Other languages
Chinese (zh)
Inventor
陈鹏
王军
陈小平
杨阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Xinzhi Thermal Control Technology Co ltd
Original Assignee
Mianyang Fulin Precision Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mianyang Fulin Precision Machinery Co Ltd filed Critical Mianyang Fulin Precision Machinery Co Ltd
Priority to CN201911077033.5A priority Critical patent/CN110701041A/en
Publication of CN110701041A publication Critical patent/CN110701041A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C15/064—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/20—Rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Abstract

The invention provides an electronic oil pump pressure relief structure which comprises a pump shell (2) and a pressure relief valve (8), wherein an oil drainage groove (24) and a pressure relief hole (25) are formed in the pump shell (2) respectively, a pressure relief notch (84) is formed in the pressure relief valve (8), a fixed connection structure is formed between the pressure relief valve (8) and the pump shell (2), when the hydraulic pressure in the pressure relief hole (25) is larger than or equal to the opening pressure of the pressure relief valve (8), the pressure relief valve (8) is opened, and the oil drainage groove (24), the pressure relief hole (25) and the pressure relief notch (84) are communicated to form a fluid channel. According to the invention, the pressure relief valve is arranged, and when the hydraulic pressure in the pressure relief hole is greater than or equal to the opening pressure of the pressure relief valve, the pressure relief valve is in an opening state, so that oil in the electronic oil pump can be discharged through the pressure relief valve in time, the pressure of an oil outlet oil path of the electronic oil pump can be reduced, and the safe operation reliability of the electronic oil pump is correspondingly improved.

Description

Electronic oil pump pressure relief structure
Technical Field
The invention relates to the field of structural design of electronic oil pumps, in particular to a pressure relief structure of an electronic oil pump, which is applied to an automobile lubricating system or a cooling system.
Background
The common electronic oil pump comprises two parts of a motor and a pump head, wherein the pump head mainly comprises a pump shell, an outer rotor and an inner rotor, and the inner rotor is directly driven by the motor through a motor shaft.
Although the electronic oil pump is already mature and applied to a lubricating system or a cooling system of an automobile, in the practical application process, the oil path of the electronic oil pump is easy to be blocked, and the working reliability of the electronic oil pump is affected. Especially, when the oil outlet passage of the electronic oil pump is blocked, the oil passage or the pump head structure is easily damaged, and the motor is in a high-load or even locked-rotor state for a long time, which finally causes the motor to be burnt.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: to the problem that prior art exists, provide an electron oil pump pressure release structure, improve the operation fail safe nature of electron oil pump.
The technical problem to be solved by the invention is realized by adopting the following technical scheme: the utility model provides an electron oil pump pressure release structure, includes pump case and relief valve, the pump case on form the oil drain groove, the relief valve on form the pressure release incision, the pump case on form the pressure release hole, relief valve and pump case between form fixed connection structure, and when the opening pressure of hydraulic pressure force in the pressure release hole is more than or equal to the relief valve, the relief valve open, oil drain groove, pressure release hole, pressure release incision between communicate and form fluid passage.
Preferably, the pressure relief valve comprises a valve core and a valve housing, the valve housing is a hollow cavity structure, and a pressure relief notch is formed in the valve housing; the pressure relief valve is characterized in that the valve housing is fixedly connected with the pump housing, a spring is arranged in an inner cavity of the valve housing, the valve core is arranged between the pressure relief hole and the spring, and when hydraulic pressure in the pressure relief hole is smaller than opening pressure of the pressure relief valve, the valve core and the pressure relief hole form an elastic contact sealing structure under the action of the spring.
Preferably, the valve core is of a spherical structure, and the diameter of the valve core is larger than that of the pressure relief hole.
Preferably, the pressure relief cut-out on the valve housing is of a U-shaped cut-out structure.
Preferably, the pressure relief notch on the valve housing is a through hole structure.
Preferably, the valve housing and the pump housing are fixedly connected by welding.
Preferably, an assembly counter bore structure is formed on the pump casing, and an interference fit structure is formed between the valve casing and the assembly counter bore on the pump casing.
Compared with the prior art, the invention has the beneficial effects that: through setting up the relief valve, form the pressure release hole on the pump case to when the hydraulic pressure in the pressure release hole is greater than or equal to the cracking pressure of relief valve, the relief valve is in the open mode, and the intercommunication forms fluid passage between oil extraction groove, pressure release hole, the pressure release incision, so that fluid in the electronic oil pump can in time discharge through the relief valve, thereby has reduced the oil circuit pressure of producing oil of electronic oil pump, has protected the safe operation of electronic oil pump effectively.
Drawings
Fig. 1 is an exploded view of the construction of an electronic oil pump.
Fig. 2 is a sectional view of the electronic oil pump.
Fig. 3 is a view from a-a in fig. 2.
Fig. 4 is a three-dimensional configuration diagram of the pump casing of fig. 1 or 2.
FIG. 5 is a schematic view of the configuration of the inboard end face of the cavity of the pump casing shown in FIG. 4.
Fig. 6 is an exploded view of the electronic oil pump pressure relief structure according to the present invention.
Fig. 7 is a sectional view of a pressure relief structure of an electronic oil pump according to the present invention.
Fig. 8 is a schematic three-dimensional structure of the valve housing in fig. 6 or 7 (embodiment 1).
Fig. 9 is a schematic three-dimensional structure of the valve housing in fig. 6 or 7 (embodiment 2).
Part label name in the figure: 1-screw, 2-pump shell, 3-outer rotor, 4-inner rotor, 5-coupler, 6-motor, 7-motor shaft, 8-pressure relief valve, 21-pump shell oil inlet, 22-pump shell oil outlet, 23-oil inlet groove, 24-oil discharge groove, 25-pressure relief hole, 81-valve core, 82-spring, 83-valve shell and 84-pressure relief notch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The electronic oil pump pressure relief structure shown in fig. 1, 2 and 3 mainly comprises a pump shell 2, an outer rotor 3, an inner rotor 4 and a pressure relief valve 8, wherein the pump shell 2 is a hollow cavity structure shown in fig. 4, 5 and 6, a cavity capable of containing the outer rotor 3 and the inner rotor 4 is formed inside the pump shell 2, an oil inlet groove 23 and an oil discharge groove 24 are respectively arranged on the side end surface in the cavity, a pump shell oil inlet 21 and a pressure relief hole 25 are axially arranged outside the pump shell 2, a pump shell oil outlet 22 is arranged in the circumferential direction outside the pump shell 2, the oil inlet groove 23 is communicated with the pump shell oil inlet 21, the oil discharge groove 24 is communicated with the pump shell oil outlet 22, and the pressure relief hole 25 is communicated with the. The pump case 2 forms a detachable fixed connection structure with the casing of the motor 6 through the screw 1, the motor 6 forms a transmission connection structure between the motor shaft 7 and the coupler 5, the coupler 5 and the inner rotor 4 form a transmission connection structure, and the inner rotor 4 and the outer rotor 3 form an inner meshing gear transmission structure, as shown in fig. 3.
As shown in fig. 2 and 7, a fixed connection structure is formed between the relief valve 8 and the pump housing 2, and when the oil pressure in the pump housing oil outlet 22 is too high, the excessive pressure can be relieved through the relief valve 8. The specific structure of the relief valve 8 is as shown in fig. 6 and 7, and mainly includes a valve core 81 and a valve housing 83, the valve housing 83 is a hollow cavity structure, a relief notch 84 is formed on the valve housing 83, the valve housing 83 is fixedly connected with the pump housing 2, a spring 82 is arranged in an inner cavity of the valve housing 83, the valve core 81 is arranged between the relief hole 25 and the spring 82, the spring 82 axially supports the valve core 81, and the force value thereof determines the opening pressure of the relief valve 8. When the hydraulic pressure in the pressure relief hole 25 is greater than or equal to the opening pressure of the pressure relief valve 8, the valve core 81 is pushed away, the spring 82 is compressed, at this time, the pressure relief valve 8 is opened, and the oil drainage groove 24, the pressure relief hole 25 and the pressure relief notch 84 are communicated to form a fluid channel, so that the medium in the oil drainage groove 24 can flow out from the gap between the valve core 81 and the pressure relief hole 25 and finally flow out through the pressure relief notch 84 on the valve housing 83. However, when the hydraulic pressure in the relief hole 25 is smaller than the opening pressure of the relief valve 8, the valve element 81 forms an elastic contact seal structure with the relief hole 25 by the spring 82, and at this time, the valve element 81 covers the relief hole 25 from the outside.
Usually, the valve housing 83 and the pump housing 2 may be fixedly connected by welding, or an assembly counterbore structure may be formed on the pump housing 2 by machining, and then an interference fit structure may be formed between the valve housing 83 and the assembly counterbore on the pump housing 2. The relief cut 84 of the valve housing 83 may be designed as a U-shaped cut as shown in fig. 8, or as a through hole as shown in fig. 9. The valve element 81 is preferably of a spherical structure, and the diameter of the valve element 81 is larger than that of the pressure relief hole 25, so that the valve element 81 can cover the pressure relief hole 25 from the outside, and the valve element 81 forms an elastic contact sealing structure with the pressure relief hole 25 under the action of the spring 82.
According to the invention, the pressure relief valve 8 is arranged, and when the hydraulic pressure in the oil discharge groove 24 is greater than or equal to the opening pressure of the pressure relief valve 8, the pressure relief valve 8 is in an open state, so that the oil discharge groove 24, the pressure relief hole 25 and the pressure relief notch 84 are communicated to form a fluid channel, therefore, oil in the inner cavity of the electronic oil pump can be discharged in time through the fluid channel, the pressure of the oil outlet oil path of the electronic oil pump is reduced, and the safe operation of the electronic oil pump is effectively protected.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. The utility model provides an electron oil pump pressure release structure, includes pump case (2), pump case (2) on form oil drain groove (24), its characterized in that: still include relief valve (8), relief valve (8) on form pressure release incision (84), pump case (2) on form pressure release hole (25), relief valve (8) and pump case (2) between form fixed connection structure, and when the opening pressure of hydraulic pressure in pressure release hole (25) more than or equal to relief valve (8), relief valve (8) open, oil drain groove (24), pressure release hole (25), pressure release incision (84) between communicate and form fluid passage.
2. The electronic oil pump pressure relief structure according to claim 1, characterized in that: the pressure relief valve (8) comprises a valve core (81) and a valve shell (83), the valve shell (83) is of a hollow cavity structure, and a pressure relief notch (84) is formed in the valve shell (83); the pressure relief valve is characterized in that the valve housing (83) is fixedly connected with the pump housing (2), the spring (82) is arranged in the inner cavity of the valve housing (83), the valve core (81) is arranged between the pressure relief hole (25) and the spring (82), and when hydraulic pressure in the pressure relief hole (25) is smaller than opening pressure of the pressure relief valve (8), the valve core (81) and the pressure relief hole (25) form an elastic contact sealing structure under the action of the spring (82).
3. The electronic oil pump pressure relief structure according to claim 2, characterized in that: the valve core (81) is of a spherical structure, and the diameter of the valve core (81) is larger than that of the pressure relief hole (25).
4. The electronic oil pump pressure relief structure according to claim 2, characterized in that: the pressure relief notch (84) on the valve shell (83) is of a U-shaped notch structure.
5. The electronic oil pump pressure relief structure according to claim 2, characterized in that: the pressure relief notch (84) on the valve shell (83) is of a through hole structure.
6. The electronic oil pump pressure relief structure according to claim 2, characterized in that: the valve shell (83) and the pump shell (2) form a fixed connection structure in a welding mode.
7. The electronic oil pump pressure relief structure according to claim 2, characterized in that: an assembly counter bore structure is formed on the pump shell (2), and an interference fit structure is formed between the valve shell (83) and the assembly counter bore on the pump shell (2).
CN201911077033.5A 2019-11-06 2019-11-06 Electronic oil pump pressure relief structure Pending CN110701041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911077033.5A CN110701041A (en) 2019-11-06 2019-11-06 Electronic oil pump pressure relief structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911077033.5A CN110701041A (en) 2019-11-06 2019-11-06 Electronic oil pump pressure relief structure

Publications (1)

Publication Number Publication Date
CN110701041A true CN110701041A (en) 2020-01-17

Family

ID=69205448

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911077033.5A Pending CN110701041A (en) 2019-11-06 2019-11-06 Electronic oil pump pressure relief structure

Country Status (1)

Country Link
CN (1) CN110701041A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111664089A (en) * 2020-05-26 2020-09-15 宁波圣龙汽车动力系统股份有限公司 Electronic oil pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111664089A (en) * 2020-05-26 2020-09-15 宁波圣龙汽车动力系统股份有限公司 Electronic oil pump

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PB01 Publication
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SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information

Address after: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province

Applicant after: Fulin Precision Co.,Ltd.

Address before: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province

Applicant before: Mianyang Fulin Jinggong Co.,Ltd.

Address after: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province

Applicant after: Mianyang Fulin Jinggong Co.,Ltd.

Address before: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province

Applicant before: MIANYANG FULIN PRECISION MACHINING Co.,Ltd.

CB02 Change of applicant information
TA01 Transfer of patent application right

Effective date of registration: 20231124

Address after: 621000 No. 27, longhui Road, Guangfu village, Wujia Town, Fucheng District, Mianyang City, Sichuan Province

Applicant after: Sichuan Xinzhi Thermal Control Technology Co.,Ltd.

Address before: 621000 No.37 Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province

Applicant before: Fulin Precision Co.,Ltd.

TA01 Transfer of patent application right