CN114110398B - Variable oil pump capable of reducing pressure fluctuation - Google Patents
Variable oil pump capable of reducing pressure fluctuation Download PDFInfo
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- CN114110398B CN114110398B CN202111442863.0A CN202111442863A CN114110398B CN 114110398 B CN114110398 B CN 114110398B CN 202111442863 A CN202111442863 A CN 202111442863A CN 114110398 B CN114110398 B CN 114110398B
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- oil
- pump body
- cavity
- slider
- pump
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- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2270/00—Controlling
- F16N2270/60—Pressure
Abstract
The variable oil pump capable of reducing pressure fluctuation comprises a pump body, a pump cover, an oil inlet and an oil outlet which are arranged on the pump body, a sliding block and a spring which are arranged in the pump body, wherein the front side of the sliding block is connected with the inner wall of the pump body through a pin shaft, the rear side of the sliding block is abutted to the inner wall of the pump body through the spring, a rotor cavity is formed in the sliding block, a rotor is arranged in the rotor cavity, a feedback cavity is arranged on the right side of the sliding block, a pressure stabilizing cavity is arranged on the left side of the sliding block and connected with the feedback cavity or the oil outlet or a main oil duct of an engine through an oil inlet channel, the pressure stabilizing cavity is connected with an external oil path through an oil drainage channel, and the oil drainage channel comprises a section of damping channel. The invention can accelerate the stabilization by reducing the swing of the sliding block, thereby reducing the pressure fluctuation.
Description
Technical Field
The invention relates to the technical field of oil pumps, in particular to a variable oil pump capable of reducing pressure fluctuation.
Background
The variable displacement oil pump is generally a variable displacement vane pump, and the vane pump can be mainly divided into a sliding variable vane pump and a swinging variable vane pump. The swing variable vane pump mainly changes the eccentricity with a rotor by adjusting the swing of a sliding block, particularly, a closed feedback cavity is formed between the sliding block and the wall of a pump body of the conventional variable oil pump, the feedback cavity is only communicated with a pilot valve through a feedback hole, and when pressure oil of an engine main oil passage passes through the pilot valve and enters the feedback cavity through the feedback hole, pressure is formed in the feedback cavity, so that the sliding block can be pushed to swing around a rotating pin.
However, in the actual working process of the variable oil pump, the feedback oil in the engine needs to pass through several oil passages when entering the feedback cavity, and has certain hysteresis, and the hysteresis is aggravated along with the increase of the viscosity of the oil, so that the slide block is repeatedly subjected to unbalanced oil pressure and spring thrust in the variable process, and swings back and forth, and pressure fluctuation is caused. The pressure fluctuation is an important index for evaluating the performance of the oil pump, and the excessive pressure fluctuation influences the running stability of parts of the oil pump, so that the problems of noise, durability and the like are caused.
Disclosure of Invention
The invention aims to provide a variable oil pump capable of reducing pressure fluctuation, which can accelerate stability by reducing the swing of a sliding block.
In order to solve the technical problems, the invention adopts the following technical scheme: the variable oil pump capable of reducing pressure fluctuation comprises a pump body, a pump cover, an oil inlet and an oil outlet which are arranged on the pump body, a sliding block and a spring which are arranged in the pump body, wherein the front side of the sliding block is connected with the inner wall of the pump body through a pin shaft, the rear side of the sliding block is abutted to the inner wall of the pump body through the spring, a rotor cavity is formed in the sliding block, a rotor is arranged in the rotor cavity, a feedback cavity is arranged on the right side of the sliding block, a pressure stabilizing cavity is arranged on the left side of the sliding block and is connected with the feedback cavity or the oil outlet or a main oil duct of an engine through an oil inlet channel, the pressure stabilizing cavity is connected with an external oil path through an oil drainage channel, the oil drainage channel comprises a section of damping channel, and the inner diameter of the damping channel is 0.8-1.5mm.
Preferably, the damping passage is located at the foremost end of the drain passage and the inlet of the damping passage is located at the bottom of the pump body.
More preferably, the inlet of the damping channel is located in the bottom surface of the pump body and abuts against the inner wall surface of the pump body.
More preferably, the inner diameter of the damping channel is 1mm in size.
Preferably, a sealing block is abutted between the left side of the sliding block and the inner wall of the pump body, and a pressure stabilizing cavity is formed in a region surrounded by the pin shaft, the left side wall of the sliding block, the sealing block and the inner wall of the pump body.
More optionally, the pressure stabilizing cavity is connected with the feedback cavity through an oil inlet channel, and the oil inlet channel is an oil through groove formed in the end face of the sliding block and used for communicating the feedback cavity with the pressure stabilizing cavity.
More optionally, the oil through groove is arranged along the profile of the semi-circumference surface of the outer side of the pin shaft.
In addition, the invention also provides a variable oil pump capable of reducing pressure fluctuation, which comprises a pump body, a pump cover, an oil inlet and an oil outlet arranged on the pump body, a sliding block and a spring arranged in the pump body, wherein the front side of the sliding block is connected with the inner wall of the pump body through a pin shaft, the rear side of the sliding block is abutted against the inner wall of the pump body through the spring, a rotor cavity is formed in the sliding block, a rotor is arranged in the rotor cavity, a feedback cavity is arranged on the right side of the sliding block, a pressure stabilizing cavity is also arranged on the right side of the sliding block, a sealing block is abutted between the right side of the sliding block and the inner wall of the pump body, the pressure stabilizing cavity is separated from the feedback cavity through the sealing block, the pressure stabilizing cavity is connected with the feedback cavity or the oil outlet or a main oil passage of an engine through an oil inlet passage, the pressure stabilizing cavity is connected with an external oil passage through an oil drainage passage, the oil passage comprises a section of a damping passage, and the inner diameter of the damping passage is 0.8-1.5mm.
Preferably, the inner diameter of the damping channel is 1mm in size.
The invention has the beneficial effects that: through setting up the pressure stabilizing cavity to utilize the oil feed passageway to lead the fluid of feedback chamber or oil-out or engine main oil gallery to the pressure stabilizing cavity, make the pressure stabilizing cavity can be full of fluid, and because possess a section of damping passageway that the internal diameter is very little in the draining passageway of pressure stabilizing cavity, this makes pressure stabilizing cavity draining speed slower, thereby let the pressure stabilizing cavity play the damping effect, when the oil pump is about to carry out the variable then, the slider can reduce its reciprocal frequency of swing under the influence of damping effect in the in-process of swinging to the left, in order to accelerate the stability of slider, and then realize reducing the purpose of pressure fluctuation oil pump.
Drawings
FIG. 1 is a schematic view of the interior of the overall structure in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a pump body in the embodiment;
FIG. 3 is a schematic structural diagram of a slider in the embodiment.
The reference signs are:
1-pump body 2-slide block 3-spring
4-pin shaft 5-sealing block 6-feedback cavity
7-pressure stabilizing cavity 8-damping channel 9-oil through 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 to be construed broadly 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 that are based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus, are not to be construed as limiting the invention.
As shown in fig. 1 to 3, a variable oil pump capable of reducing pressure fluctuation comprises a pump body 1, a pump cover, an oil inlet and an oil outlet arranged on the pump body 1, a slide block 2 and a spring 3 arranged in the pump body 1, wherein the front side of the slide block 2 is connected with the inner wall of the pump body 1 through a pin shaft 4, the rear side of the slide block 2 is abutted against the inner wall of the pump body 1 through the spring 5, a rotor cavity is formed inside the slide block 2, a rotor is arranged in the rotor cavity, a feedback cavity 6 is arranged on the right side of the slide block 2, a pressure stabilizing cavity 7 is arranged on the left side of the slide block 2, the pressure stabilizing cavity 7 is connected with the feedback cavity 6 or the oil outlet or a main oil duct of an engine through an oil inlet channel, the pressure stabilizing cavity 7 is connected with an external oil channel through an oil drainage channel, the oil drainage channel comprises a section of a damping channel 8, and the inner diameter of the damping channel 8 is 0.8-1.5mm.
According to the variable oil pump capable of reducing pressure fluctuation, after the pressure stabilizing cavity 7 is arranged, oil in the feedback cavity 6 or the oil outlet or the main oil duct of the engine is led to the pressure stabilizing cavity 7 through the oil inlet channel, so that the pressure stabilizing cavity 7 can be filled with the oil, and the oil drainage channel of the pressure stabilizing cavity 7 is provided with the damping channel 8 with a small inner diameter, so that the pressure stabilizing cavity 7 can drain the oil slowly, the pressure stabilizing cavity 7 plays a damping role, and therefore when the oil pump needs to perform variable, the frequency of reciprocating swing of the sliding block 2 can be reduced under the influence of the damping effect in the process of swinging to the left, the stability of the sliding block 2 is accelerated, the pressure fluctuation of oil pump parts is reduced, noise is reduced, and durability is improved.
Those skilled in the art should know that the oil drainage channel may be connected to any external oil passage, and the direction of the oil passage connected to the oil drainage channel is not limited, and only the inner diameter of the damping channel 8 therein needs to be ensured within the small range, and in fact, because the oil in the pressure stabilizing cavity 7 may be discharged, the oil drainage channel does not actually hinder the oscillation of the slider 2, but can play a certain damping role, so as to reduce the reciprocating oscillation frequency of the slider 2 in the oscillation process of the slider 2.
Wherein, the damping channel 8 is located the foremost end of draining the oil passageway and the entry of damping channel 8 is located the bottom of pump body 1, and this is equivalent to the damping channel and is similar to the aperture of a pump body bottom, and it is more convenient to process.
In the above embodiment, the sealing block 9 is abutted between the left side of the slider 2 and the inner wall of the pump body 1, and the pressure stabilizing cavity 7 is formed in the region enclosed by the pin 4, the left side wall of the slider 2, the sealing block 9 and the inner wall of the pump body 1.
Preferably, the pressure maintaining cavity 7 in this embodiment is connected to the feedback cavity 6 through an oil inlet channel, specifically, the oil inlet channel is an oil through groove 9 (as shown in fig. 1 and 3) formed in an end surface of the slider 2 and communicating the feedback cavity 6 with the pressure maintaining cavity 7.
Preferably, the oil through groove 9 is arranged along the profile of the semi-circumference surface of the outer side of the pin shaft 4, and the oil through groove 9 plays a role in communicating the feedback cavity 6 with the pressure stabilizing cavity 7 on one hand, and can be more convenient for oil to contact the outer circumference surface of the pin shaft 4 so as to improve the lubricating effect on the pin shaft 4 on the other hand.
In addition, the entry of damping passageway 8 is located pump body 1 bottom surface and leans on in the internal face of pump body 1 to in slider 2 also can keep good draining effect when swinging to extreme position to the left, the internal diameter size of damping passageway 8 of this embodiment is 1mm, so that processing, can be with draining speed control in more ideal scope simultaneously, let the damping effect that pressure stabilizing cavity 7 played more reasonable.
Except the preferred oil inlet passage structure in this embodiment, when the oil inlet passage communicates the oil-out, the accessible sets up specific oil duct structure on the pump body and realizes the intercommunication, when the oil inlet passage communicates the engine main oil gallery, then can set up specific oil duct structure on the pump body and communicate the engine main oil gallery through designing outside oil gallery, and the technical personnel in the art can not have any degree of difficulty when carrying out specific design and implementation to these structures, consequently no longer give unnecessary details.
Example 2
A variable oil pump capable of reducing pressure fluctuation comprises a pump body 1, a pump cover, an oil inlet and an oil outlet which are arranged on the pump body 1, a sliding block 2 and a spring 3 which are arranged in the pump body 1, wherein the front side of the sliding block 2 is connected with the inner wall of the pump body 1 through a pin shaft 4, the rear side of the sliding block 2 is abutted against the inner wall of the pump body 1 through the spring 5, a rotor cavity is formed in the sliding block 2, a rotor is arranged in the rotor cavity, a feedback cavity 6 is arranged on the right side of the sliding block 2, a pressure stabilizing cavity is further arranged on the right side of the sliding block 2, a sealing block is abutted between the right side of the sliding block 2 and the inner wall of the pump body 1 and separates the pressure stabilizing cavity from the feedback cavity 6, the pressure stabilizing cavity is connected with the feedback cavity 6 or the oil outlet or a main oil duct of an engine through an oil inlet channel, the pressure stabilizing cavity is connected with an external oil path through an oil drainage channel, the oil channel comprises a section of a damping channel, and the inner diameter of the damping channel is 0.8-1.5mm.
Preferably, the inner diameter of the damping channel is 1mm.
The difference between the embodiment and the embodiment 1 lies in that the pressure stabilizing cavity is arranged on the same side of the feedback cavity 6, in fact, as long as the oil in the pressure stabilizing cavity can be discharged at a slower speed, the damping effect as in the embodiment 1 can be achieved to reduce the swing frequency of the sliding block 2 in the variable process and accelerate the stability of the sliding block, the specific size of the pressure stabilizing cavity and the specific positions of the sealing block and the oil inlet channel are not specifically limited, and the person skilled in the art can perform adaptive adjustment according to the actual structure of the pump body 1, and therefore the adjustment is not illustrated through the attached drawings.
The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.
Some of the figures and descriptions of the present invention have been simplified to provide a convenient understanding of the modifications of the invention relative to the prior art, and to omit elements for clarity, as those skilled in the art will recognize may also constitute the subject matter of the present invention.
Claims (4)
1. The utility model provides a variable oil pump that can reduce pressure fluctuation, includes the pump body (1), pump cover, sets up oil inlet and the oil-out on the pump body (1), sets up slider (2) and spring (3) in the pump body (1), the front side of slider (2) is connected through selling between axle (4) and the pump body (1) inner wall, the rear side of slider (2) passes through the inner wall butt of spring (3) and pump body (1), the inside rotor chamber and the rotor intracavity of formation of slider (2) are equipped with the rotor, the right side of slider (2) is equipped with feedback chamber (6), its characterized in that: the left side of slider (2) is equipped with pressure stabilizing cavity (7), feedback cavity (6) is connected through the oil feed passageway in pressure stabilizing cavity (7), outside oil circuit is connected through the draining passageway in pressure stabilizing cavity (7), include one section damping passageway (8) in the draining passageway, the internal diameter size of damping passageway (8) is 0.8-1.5mm, the butt has sealing block (5) between the left side of slider (2) and the inner wall of the pump body (1), the regional pressure stabilizing cavity (7) that forms that encloses of round pin axle (4), slider (2) left side wall, sealing block (5) and pump body (1) inner wall, the oil feed passageway is for seting up logical oil groove (9) in intercommunication feedback cavity (6) and pressure stabilizing cavity (7) of slider (2) terminal surface, logical oil groove (9) set up along the semi-periphery profile in the round pin axle (4) outside.
2. The variable oil pump capable of reducing pressure fluctuations of claim 1, characterized in that: the damping channel (8) is located at the foremost end of the oil drainage channel, and the inlet of the damping channel (8) is located at the bottom of the pump body (1).
3. The variable oil pump capable of reducing pressure fluctuations of claim 2, characterized in that: the inlet of the damping channel (8) is positioned on the bottom surface of the pump body (1) and is close to the inner wall surface of the pump body (1).
4. The variable oil pump capable of reducing pressure fluctuations of claim 3, characterized in that: the inner diameter of the damping channel (8) is 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111442863.0A CN114110398B (en) | 2021-11-30 | 2021-11-30 | Variable oil pump capable of reducing pressure fluctuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111442863.0A CN114110398B (en) | 2021-11-30 | 2021-11-30 | Variable oil pump capable of reducing pressure fluctuation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114110398A CN114110398A (en) | 2022-03-01 |
| CN114110398B true CN114110398B (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111442863.0A Active CN114110398B (en) | 2021-11-30 | 2021-11-30 | Variable oil pump capable of reducing pressure fluctuation |
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| Country | Link |
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| CN (1) | CN114110398B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8417148D0 (en) * | 1984-07-05 | 1984-08-08 | Hobourn Eaton Ltd | Variable capacity roller-and vane-type pumps |
| WO2005108792A1 (en) * | 2004-05-07 | 2005-11-17 | Tesma International Inc. | Vane pump using line pressure to directly regulate displacement |
| EP1828610B1 (en) * | 2004-12-22 | 2016-12-21 | Magna Powertrain Inc. | Variable capacity vane pump with dual control chambers |
| DE102006061326B4 (en) * | 2006-12-22 | 2012-02-16 | Mahle International Gmbh | Positioning device for a volume-adjustable cell pump |
| JP5589068B2 (en) * | 2009-06-12 | 2014-09-10 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Lubricating oil pump system and lubricating oil pump |
| JP6664465B2 (en) * | 2016-03-07 | 2020-03-13 | 日立オートモティブシステムズ株式会社 | Variable displacement pump |
| US20200072216A1 (en) * | 2018-08-31 | 2020-03-05 | GM Global Technology Operations LLC | Adaptive pivot for variable displacement vane pump |
| US20200208630A1 (en) * | 2018-12-28 | 2020-07-02 | Stackpole International Engineered Products, Ltd. | Vane pump having hollow pivot pin with fastener |
| US11421685B2 (en) * | 2019-04-23 | 2022-08-23 | Stackpole International Engineered Products, Ltd. | Vane pump with improved seal assembly for control chamber |
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2021
- 2021-11-30 CN CN202111442863.0A patent/CN114110398B/en active Active
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| CN114110398A (en) | 2022-03-01 |
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