CN111946620A - Oil pump capable of avoiding leakage of gap of shaft hole of pump cover - Google Patents

Oil pump capable of avoiding leakage of gap of shaft hole of pump cover Download PDF

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Publication number
CN111946620A
CN111946620A CN202010869926.XA CN202010869926A CN111946620A CN 111946620 A CN111946620 A CN 111946620A CN 202010869926 A CN202010869926 A CN 202010869926A CN 111946620 A CN111946620 A CN 111946620A
Authority
CN
China
Prior art keywords
shaft hole
groove
oil
pump
pump cover
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
CN202010869926.XA
Other languages
Chinese (zh)
Inventor
邓鹏辉
许仲秋
刘光明
佘笑梅
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.)
Hunan Oil Pump Co Ltd
Original Assignee
Hunan Oil Pump 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 Hunan Oil Pump Co Ltd filed Critical Hunan Oil Pump Co Ltd
Priority to CN202010869926.XA priority Critical patent/CN111946620A/en
Publication of CN111946620A publication Critical patent/CN111946620A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/02Pressure lubrication using lubricating pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/02Pressure lubrication using lubricating pumps
    • F01M2001/0207Pressure lubrication using lubricating pumps characterised by the type of pump
    • F01M2001/0238Rotary pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/30Casings or housings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The invention provides an oil pump capable of avoiding leakage of a gap of a shaft hole of a pump cover, which comprises a pump body and a pump cover, wherein the pump body comprises an oil inlet and an oil outlet, the pump cover comprises a shaft hole, a low-pressure area joint surface corresponding to the oil inlet and a high-pressure area joint surface corresponding to the oil outlet, the low-pressure area joint surface and the high-pressure area joint surface are arranged on the same end surface, the low-pressure area joint surface is provided with a first unloading groove, the high-pressure area joint surface is provided with a second unloading groove, the shaft hole is a blind hole, an inclined hole is arranged between the shaft hole and the first unloading groove, a connecting groove is arranged between the shaft hole and the second unloading groove, the shaft hole is communicated with the first unloading groove through the inclined hole, the shaft hole is communicated with the second unloading groove through the connecting groove, and the. The invention not only can effectively avoid the leakage of the gap of the shaft hole of the pump cover, improve the volume efficiency of the oil pump, but also can ensure better lubricating effect.

Description

Oil pump capable of avoiding leakage of gap of shaft hole of pump cover
Technical Field
The invention relates to the technical field of oil pumps, in particular to an oil pump capable of preventing a gap of a pump cover shaft hole from leaking.
Background
The volumetric efficiency of the oil pump is a very key performance index, and the higher the volumetric efficiency of the pump is, the smaller the engine power consumed by the pump is, the higher the fuel economy is and the lower the discharge amount is under the same condition.
The loss of volumetric efficiency in the oil pump is generally dominated by internal leakage, which mainly has the influence factors of end surface gap leakage, tooth top gap leakage, shaft hole gap leakage and the like. Shaft hole clearance is revealed and is revealed including pump body shaft hole clearance generally and reveal with pump cover shaft hole clearance, the shaft hole is the kinematic pair, need bear the high load of assaulting of high rotational speed, it is lubricated to need guide lubricating oil, general shaft hole is the through-hole, the high nip of pump is connected to one end, the air is connected to one end, because pressure differential between the two for the oil stream of high nip plays the purpose in lubricated shaft hole to the low-pressure zone, such structure must lead to the revealing of oil can appear in shaft hole and the communicating one end of air.
The leakage amount of the shaft hole can be reduced by reducing the clearance value between the shaft and the shaft hole in general, but the smaller the clearance value is, the higher the required machining precision is, the cost is inevitably increased, and the optimal oil film thickness between the shaft hole and the shaft surface can not be formed due to too small clearance, so that the lubricating condition of the shaft can be directly influenced, and the eccentric wear failure of the shaft hole is caused. Therefore, how to solve the problem that the gap leakage of the shaft hole of the pump cover in the oil pump is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing an oil pump capable of avoiding the leakage of the gap of a pump cover shaft hole, which is used for solving the problem of the leakage of the gap of the pump cover shaft hole.
In order to achieve the purpose, the invention adopts the following scheme: the utility model provides a can avoid oil pump that pump cover shaft hole clearance was revealed, includes the pump body, pump cover, the pump body includes oil inlet, oil-out, the pump cover includes the shaft hole, the low-pressure region faying face that corresponds with the oil inlet and the high-pressure region faying face that corresponds with the oil-out, low-pressure region faying face and high-pressure region faying face are with on the terminal surface, the low-pressure region faying face is equipped with first off-load groove, the high-pressure region faying face is equipped with second off-load groove, the shaft hole is the blind hole, be equipped with the inclined hole between shaft hole and the first off-load groove, be equipped with the spread groove between shaft hole and the second off-load groove, the shaft hole is linked together through the inclined hole with first off-load groove, the opening direction unanimity of.
Preferably, one end of the inclined hole is positioned at the bottom of the first unloading groove, and the other end of the inclined hole is close to the bottom of the shaft hole.
More preferably, the connecting groove has a depth corresponding to a depth of the second relief groove.
More preferably, the depth of the first relief groove coincides with the depth of the second relief groove.
The invention has the beneficial effects that: through establishing the shaft hole into the blind hole, can not communicate with the air, can effectively avoid the pump cover shaft hole clearance to reveal, improve the volumetric efficiency of oil pump. Meanwhile, the shaft hole is communicated with the connecting groove, the first unloading groove, the inclined hole and the second unloading groove through the arrangement of the first unloading groove, the second unloading groove, the inclined hole and the connecting groove, so that lubricating oil can be in a flowing state all the time, and a better lubricating effect is ensured.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a pump cover according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the pump cover in the A-A direction in the embodiment.
In the figure:
1-pump cover 2-first unloading groove 3-inclined hole
4-shaft hole 5-connecting groove 6-second unloading groove.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, in the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not in direct contact, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.
As shown in fig. 1-2, an oil pump capable of avoiding leakage of a gap between a shaft hole of a pump cover includes a pump body and a pump cover 1, the pump body includes an oil inlet and an oil outlet, the pump cover 1 includes a shaft hole 4, a low-pressure junction surface corresponding to the oil inlet and a high-pressure junction surface corresponding to the oil outlet, the low-pressure junction surface and the high-pressure junction surface are on the same end surface, the low-pressure junction surface is provided with a first unloading groove 2, the high-pressure junction surface is provided with a second unloading groove 6, the shaft hole 4 is a blind hole, an inclined hole 3 is provided between the shaft hole 4 and the first unloading groove 2, a connecting groove 5 is provided between the shaft hole 4 and the second unloading groove 6, the shaft hole 4 is communicated with the first unloading groove 2 through the inclined hole 3, the shaft hole 4 is communicated with the second unloading groove 6 through the connecting groove 5.
The oil pump capable of avoiding the gap leakage of the shaft hole of the pump cover provided by the embodiment has the advantages that the shaft hole 4 on the pump cover 1 is a blind hole, and the gap leakage cannot be caused by the communication with air, so that the gap leakage of the shaft hole can be avoided, and the volume efficiency of the oil pump is improved. Lubricating oil of oil-out high pressure district gets into shaft hole 4 counter shaft through second off-load groove 6 along spread groove 5 and lubricates, through inclined hole 3 intercommunication shaft hole 4 and first off-load groove 2 for high-pressure oil in the shaft hole 4 flows to the first off-load groove 2 that corresponds with the oil inlet low-pressure district through inclined hole 3, makes lubricating oil be in the state of flowing always, thereby guarantees that the axle can carry out abundant lubrication.
It should be noted that, the shaft hole 4 is set as a blind hole, so that the influence of the clearance value between the shaft hole 4 and the shaft on clearance leakage is minimized, the clearance value can be set by considering the optimal oil film thickness, the shaft hole 4 is fully lubricated, the friction work consumption between the shaft and the shaft hole 4 is minimized, the eccentric wear failure of the shaft hole 4 is effectively improved, meanwhile, the clearance leakage of the shaft hole 4 can be eliminated, and the volumetric efficiency of the oil pump is improved. Moreover, because the clearance value between the shaft hole 4 and the shaft does not need to be smaller, the machining precision is not higher relatively, and the cost can be saved to a certain extent. In addition, the first relief groove 2 and the second relief groove 6 can be used for relieving partial pressure, and excessive pressure is prevented. The oil pump cover listed in the embodiment is a pump cover structure including two shaft holes in a gear pump, and is also applicable to other oil pump types, such as a pump cover structure having only one shaft hole, such as a rotor type pump cover structure and a vane type pump cover structure.
In the present embodiment, as a preferable mode, one end of the inclined hole 3 is located at the bottom of the first relief groove 2, and the other end is close to the bottom of the shaft hole 4.
More preferably, the depth of the coupling groove 5 and the depth of the second relief groove 6 may be the same. In addition, in the present embodiment, as more preferable, the depth of the first relief groove 2 and the depth of the second relief groove 6 may be uniform.
Although the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention.

Claims (4)

1. The utility model provides a can avoid oil pump that pump cover shaft hole clearance was revealed, includes the pump body, pump cover (1), the pump body includes oil inlet, oil-out, pump cover (1) includes shaft hole (4), the low-pressure area faying face that corresponds with the oil inlet and the high-pressure area faying face that corresponds with the oil-out, low-pressure area faying face and high-pressure area faying face are with on a terminal surface, its characterized in that: the low-pressure area faying face is equipped with first off-load groove (2), the high-pressure area faying face is equipped with second off-load groove (6), shaft hole (4) are the blind hole, be equipped with inclined hole (3) between shaft hole (4) and first off-load groove (2), be equipped with spread groove (5) between shaft hole (4) and second off-load groove (6), shaft hole (4) are linked together through inclined hole (3) with first off-load groove (2), shaft hole (4) are linked together through spread groove (5) with second off-load groove (6), shaft hole (4) are unanimous with the opening direction of first off-load groove (2) and second off-load groove (6).
2. The oil pump capable of avoiding the leakage of the gap of the shaft hole of the pump cover according to claim 1, characterized in that: one end of the inclined hole (3) is positioned at the bottom of the first unloading groove (2), and the other end of the inclined hole is close to the bottom of the shaft hole (4).
3. The oil pump capable of avoiding the leakage of the gap of the shaft hole of the pump cover according to claim 2, characterized in that: the depth of the connecting groove (5) is consistent with that of the second unloading groove (6).
4. The oil pump capable of avoiding the leakage of the gap of the shaft hole of the pump cover according to claim 3, characterized in that: the depth of the first unloading groove (2) is consistent with that of the second unloading groove (6).
CN202010869926.XA 2020-08-26 2020-08-26 Oil pump capable of avoiding leakage of gap of shaft hole of pump cover Pending CN111946620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010869926.XA CN111946620A (en) 2020-08-26 2020-08-26 Oil pump capable of avoiding leakage of gap of shaft hole of pump cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010869926.XA CN111946620A (en) 2020-08-26 2020-08-26 Oil pump capable of avoiding leakage of gap of shaft hole of pump cover

Publications (1)

Publication Number Publication Date
CN111946620A true CN111946620A (en) 2020-11-17

Family

ID=73366461

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010869926.XA Pending CN111946620A (en) 2020-08-26 2020-08-26 Oil pump capable of avoiding leakage of gap of shaft hole of pump cover

Country Status (1)

Country Link
CN (1) CN111946620A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101113733A (en) * 2006-07-30 2008-01-30 王尔耕 Engine oil pump of diesel engine
CN202220633U (en) * 2011-07-22 2012-05-16 湖南机油泵股份有限公司 Gear transmission rotor oil pump connected with an end cover of an engine
US20160305425A1 (en) * 2015-04-14 2016-10-20 Denso Corporation Fluid pump
CN109931488A (en) * 2018-09-27 2019-06-25 湖南机油泵股份有限公司 A kind of lubricating oil pump being avoided that inordinate wear

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101113733A (en) * 2006-07-30 2008-01-30 王尔耕 Engine oil pump of diesel engine
CN202220633U (en) * 2011-07-22 2012-05-16 湖南机油泵股份有限公司 Gear transmission rotor oil pump connected with an end cover of an engine
US20160305425A1 (en) * 2015-04-14 2016-10-20 Denso Corporation Fluid pump
CN109931488A (en) * 2018-09-27 2019-06-25 湖南机油泵股份有限公司 A kind of lubricating oil pump being avoided that inordinate wear

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Application publication date: 20201117