阅读说明：本技术 一种可变排量转子机油泵 (Variable displacement rotor oil pump ) 是由 王书林 安进 张辰 周涛 刘路 杨冰 豆刚 张增光 雷淋森 于 2021-08-12 设计创作，主要内容包括：本发明涉及一种可变排量转子机油泵,包括壳体、内转子、外转子、弹簧、弹簧底座、滑块、调压板及盖板；内转子安装于外转子内并安装于壳体内,弹簧的一端与滑块连接,另一端与弹簧底座连接后安装于壳体内,且滑块与调压板连接,调压板安装于外转子与盖板之间的壳体内,且调压板相对于壳体的内腔有限的旋转,盖板通过固定螺栓安装于壳体上。本技术方案通过调节机油泵的性能,改善发动机运动部件的滑滑环境,并按需供油,本技术方案通过调压板结构,节省发动机高转速下的功率浪费,达到节油效果,并且本技术方案的结构简单,在实施过程中,转子无相对运动,可靠性好,并且部件少,有利于降低成本。(The invention relates to a variable displacement rotor oil pump, which comprises a shell, an inner rotor, an outer rotor, a spring base, a sliding block, a pressure regulating plate and a cover plate, wherein the inner rotor is arranged in the shell; the inner rotor is arranged in the outer rotor and arranged in the shell, one end of the spring is connected with the sliding block, the other end of the spring is connected with the spring base and then arranged in the shell, the sliding block is connected with the pressure regulating plate, the pressure regulating plate is arranged in the shell between the outer rotor and the cover plate, the pressure regulating plate rotates in a limited mode relative to an inner cavity of the shell, and the cover plate is arranged on the shell through a fixing bolt. The technical scheme improves the sliding environment of the moving parts of the engine by adjusting the performance of the engine oil pump and supplies oil as required, saves the power waste of the engine at high rotating speed by the pressure adjusting plate structure, achieves the oil saving effect, has simple structure, has no relative movement of the rotors in the implementation process, good reliability and few parts, and is favorable for reducing the cost.)

1. A variable displacement rotor oil pump is characterized by comprising a shell, an inner rotor, an outer rotor, a spring base, a sliding block, a pressure regulating plate and a cover plate;

the inner rotor is arranged in the outer rotor and arranged in the shell, one end of the spring is connected with the sliding block, the other end of the spring is connected with the spring base and then arranged in the shell, the sliding block is connected with the pressure regulating plate, the pressure regulating plate is arranged in the shell between the outer rotor and the cover plate, the rotation of the pressure regulating plate relative to the inner cavity of the shell is limited, and the cover plate is arranged on the shell through a fixing bolt.

2. The variable displacement rotor oil pump of claim 1, wherein a casing high pressure chamber, a casing low pressure chamber, and a feedback chamber are provided within the casing, the casing high pressure chamber is connected to the outlet pipe, and a feedback oil passage is provided at the outlet pipe, the feedback oil passage connecting the feedback chamber and the outlet pipe.

3. The variable displacement rotor oil pump of claim 2, wherein a solenoid valve is disposed within the feedback oil passage, the solenoid valve being in electrical signal connection with an engine controller.

4. The variable displacement rotor oil pump of claim 1, wherein a displacement limiting structure is designed on one side of the mounting surface of the pressure regulating plate on the housing for limiting the rotation angles of the sliding block and the pressure regulating plate.

5. The variable displacement rotor oil pump of claim 2, wherein the pressure regulating plate comprises a pressure regulating plate body and a slider shift lever arranged outside the pressure regulating plate body, the slider shift lever being engaged with the slider; the pressure regulating plate body is provided with a pressure regulating plate high-pressure cavity and a pressure regulating plate low-pressure cavity which are communicated with the pressure regulating plate body and are in one-to-one correspondence with the shell high-pressure cavity and the shell low-pressure cavity.

6. The variable displacement rotor oil pump of claim 5, wherein six circular arc-shaped protrusions are uniformly distributed on the outer periphery of the pressure regulating plate body and are used for matching with an inner cavity of the shell to realize rotation of the pressure regulating plate, the outer circle of the pressure regulating plate body is concentric with the outer rotor, the inner circle of the pressure regulating plate body is concentric with the inner rotor, and the outer circle of the pressure regulating plate body is not concentric with the inner circle of the pressure regulating plate body.

7. The variable displacement rotor oil pump of claim 1, wherein the slider comprises a slider body, a slider protrusion is arranged on one surface of the slider body, the surface of one side of the slider body, which is in contact with the inner cavity of the housing, is an arc surface, an opening is arranged on the side opposite to the arc surface for accommodating the slider driving lever, and the slider protrusion is used for being matched with one end of the spring;

the spring base comprises a spring base body and a spring base bulge arranged on one surface of the spring base body, and the spring base bulge is matched with the other end of the spring.

8. The variable displacement rotor oil pump of claim 1, wherein the cover plate is a flat plate structure, and through holes corresponding to the mounting holes of the housing are provided at a periphery of the cover plate for passing through fixing bolts.

Technical Field

The invention belongs to the technical field of oil pumps of engines, and particularly relates to a variable displacement rotor oil pump.

Background

The oil pump is an essential part of an engine and is used for forcibly pressing and conveying oil to the moving surfaces of various parts of the engine after the oil is increased to a certain pressure. Common oil pump structural types include gear pumps, vane pumps, rotor pumps and the like. The performance of the engine oil pump is designed according to the actual requirements of each type of engine, the poor lubrication of moving parts of the engine can cause the complete machine failure due to the excessively low performance of the engine oil pump, the power loss and waste of the engine can be increased due to the excessively high performance of the engine oil pump, the requirements on all sealing parts of the engine are high, and the problem of engine oil leakage is easy to occur.

The commonly used variable displacement oil pump at present is mainly divided into a variable displacement vane pump and a variable displacement rotor pump. The variable displacement vane pump is realized by adjusting the center eccentricity of the vanes according to oil pressure. The variable displacement rotor pump is realized by adjusting the eccentricity angle of the inner rotor and the outer rotor according to oil pressure.

The performance of the oil pump as a conventional pump increases with the rotating speed of the engine. When the engine rotates at a high speed, the performance of the oil pump is excessive, and a pressure relief structure is needed to reduce the pressure, so that the power of the engine is wasted. Therefore, it is desirable that the engine oil pump performance of the engine be balanced at a reasonable level after the engine is started, and no additional power is consumed.

Disclosure of Invention

The invention aims to provide a variable displacement rotor oil pump, which can balance the performance of the oil pump of an engine at a reasonable level after the engine is started and does not consume the power of the engine additionally.

In order to realize the purpose, the invention is realized by the following technical scheme:

a variable displacement rotor oil pump comprises a shell, an inner rotor, an outer rotor, a spring base, a sliding block, a pressure regulating plate and a cover plate;

the inner rotor is arranged in the outer rotor and arranged in the shell, one end of the spring is connected with the sliding block, the other end of the spring is connected with the spring base and then arranged in the shell, the sliding block is connected with the pressure regulating plate, the pressure regulating plate is arranged in the shell between the outer rotor and the cover plate, the rotation of the pressure regulating plate relative to the inner cavity of the shell is limited, and the cover plate is arranged on the shell through a fixing bolt.

Further, a shell high-pressure cavity, a shell low-pressure cavity and a feedback cavity are arranged in the shell, the shell high-pressure cavity is connected with the outlet pipe, a feedback oil channel is arranged at the outlet pipe, and the feedback oil channel is connected with the feedback cavity and the outlet pipe.

Furthermore, an electromagnetic valve is arranged in the feedback oil duct and is in electric signal connection with the engine controller.

Furthermore, a displacement limiting structure is designed on one side of the mounting surface of the pressure regulating plate on the shell and used for limiting the rotating angles of the sliding block and the pressure regulating plate.

Further, the pressure regulating plate comprises a pressure regulating plate body and a sliding block deflector rod arranged on the outer side of the pressure regulating plate body, and the sliding block deflector rod is matched with the sliding block; the pressure regulating plate body is provided with a pressure regulating plate high-pressure cavity and a pressure regulating plate low-pressure cavity which are communicated with the pressure regulating plate body and are in one-to-one correspondence with the shell high-pressure cavity and the shell low-pressure cavity.

Furthermore, six circular arc-shaped bulges are uniformly distributed on the periphery of the pressure regulating plate body and are used for matching with an inner cavity of the shell to realize the rotation of the pressure regulating plate, the outer circle of the pressure regulating plate body is concentric with the outer rotor, the inner circle of the pressure regulating plate body is concentric with the inner rotor, and the outer circle of the pressure regulating plate body is not concentric with the inner circle of the pressure regulating plate body.

Further, the sliding block comprises a sliding block body, a sliding block protrusion is arranged on one surface of the sliding block body, the surface of one side, in contact with the inner cavity of the shell, of the sliding block body is an arc-shaped surface, an opening is formed in the side, opposite to the arc-shaped surface, of the sliding block body and used for accommodating the sliding block deflector rod, and the sliding block protrusion is used for being matched with one end of the spring;

the spring base comprises a spring base body and a spring base bulge arranged on one surface of the spring base body, and the spring base bulge is matched with the other end of the spring.

Furthermore, the cover plate is of a flat plate structure, and through holes corresponding to the mounting holes of the shell are formed in the periphery of the cover plate and used for allowing fixing bolts to penetrate through.

The invention has the beneficial effects that:

the technical scheme improves the sliding environment of the moving parts of the engine by adjusting the performance of the engine oil pump and supplies oil as required, saves the power waste of the engine at high rotating speed by the pressure adjusting plate structure, achieves the oil saving effect, has simple structure, has no relative movement of the rotors in the implementation process, good reliability and few parts, and is favorable for reducing the cost.

Drawings

FIG. 1 is an exploded view of a variable displacement rotary pump according to the present invention;

FIG. 2 is a schematic view of the housing structure;

FIG. 3 is a schematic view of the pressure regulating plate;

FIG. 4 is a schematic view of a slider structure;

FIG. 5 is a schematic view of a spring base structure;

FIG. 6 is a schematic view of the installation of the slider, spring and spring mount on the housing;

FIG. 7 is a schematic view of the pressure plate and housing position in the high displacement mode;

FIG. 8 is a schematic view of the pressure plate and housing position in the low displacement mode.

Description of the reference numerals

1. The pressure regulating device comprises a shell, 2, an inner rotor, 3, an outer rotor, 4, a spring, 5, a spring base, 6, a sliding block, 7, a pressure regulating plate, 8, a cover plate, 9, a fixing bolt, 51, a spring base body, 52, a spring base protrusion, 61, a sliding block body, 62, a sliding block protrusion, 63, an arc-shaped surface, 64, an opening, 71, a pressure regulating plate body, 72, a sliding block deflector rod, 73, a pressure regulating plate high-pressure cavity, 74, a pressure regulating plate low-pressure cavity, 75, an arc-shaped protrusion, 76, an outer circle of the pressure regulating plate body, 77, an inner circle of the pressure regulating plate body, 101, a shell body, 102, an outlet pipe, 103, a feedback cavity, 104, a shell high-pressure cavity, 105, a shell low-pressure cavity, 106, a feedback oil channel, 107, a mounting hole, 108, a maximum displacement point, 109 and a minimum displacement point.

Detailed Description

The technical solutions of the present invention are described in detail below by examples, and the following examples are only exemplary and can be used only for explaining and explaining the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.

The application provides a variable displacement rotor oil pump, different from the conventional variable displacement rotor oil pump, the variable displacement rotor oil pump does not need an outer rotor to rotate around the center of an inner rotor with a fixed eccentricity, and is realized by adding a pressure regulating plate structure.

As shown in fig. 1, the variable displacement oil pump of the present application includes a housing 1, an inner rotor 2, an outer rotor 3, a spring 4, a spring base 5, a slider 6, a pressure regulating plate 7, a cover plate 8, and a fixing bolt 9.

As shown in fig. 2, the structure of the casing of the oil pump of the present application is substantially the same as that of a conventional fixed displacement rotor pump, the structure of the inner cavity of the casing corresponds to the inner rotor and the outer rotor, a casing high-pressure cavity 104, a casing low-pressure cavity 105, and a feedback cavity 103 are arranged in the inner cavity of the casing, the three cavities are not communicated, an outlet pipe 102 is arranged on the casing, the outlet pipe 102 is communicated with the casing high-pressure cavity 104, a feedback oil passage 106 for communicating the feedback cavity 103 with the outlet pipe 102 is arranged at the position of the outlet pipe in the casing, the adjustment here belongs to passive adjustment, and engine oil after the pump can be introduced into the feedback cavity. In other embodiments of the present application, a solenoid valve is installed in the feedback oil passage, and the solenoid valve is electrically connected with an engine controller and can be actively adjusted according to design. The casing in this application adopts the die-casting aluminium to make, and the design of pressure regulating plate installation face one side has discharge capacity limit structure on the casing for the rotation angle me that limits slider and pressure regulating plate corresponds maximum discharge capacity point 108 and minimum discharge capacity point 109 respectively.

As shown in fig. 3, the pressure regulating plate 7 of the present application is located in the casing between the outer rotor 3 and the cover plate 8, and is made of an aluminum plate or a steel plate, and the thickness of the pressure regulating plate is 5 mm.

The pressure regulating plate 7 comprises a pressure regulating plate body 71 and a sliding block deflector rod 72 arranged on the outer side of the pressure regulating plate body, and the sliding block deflector rod is matched with the sliding block 6 and used for pushing the pressure regulating plate to rotate when the displacement of the oil pump is regulated; the pressure regulating plate body is provided with a pressure regulating plate high-pressure cavity 73 and a pressure regulating plate low-pressure cavity 74 which are communicated with the pressure regulating plate body and are in one-to-one correspondence with the shell high-pressure cavity and the shell low-pressure cavity.

Six circular arc-shaped bulges 75 are uniformly distributed on the periphery of the pressure regulating plate body 71 and are used for matching with the inner cavity of the shell to realize the rotation of the pressure regulating plate, the structure can reduce the friction resistance when the pressure regulating plate rotates, and the adjustment is smoother. The outer circle 76 of the pressure regulating plate body is concentric with the outer rotor 3, the inner circle 77 of the pressure regulating plate body is concentric with the inner rotor 2, and the outer circle and the inner circle of the pressure regulating plate body are not concentric.

As shown in fig. 4 to 6, the slider 6 is made of steel material and includes a slider body 61, a slider protrusion 62 is disposed on one surface of the slider body, a surface of one side of the slider body contacting the inner cavity of the housing is an arc surface 63, and contacts with the inner cavity wall of the housing in an arc manner, so as to reduce frictional resistance, and an opening 64 is disposed on a side opposite to the arc surface for accommodating the slider rod, and the slider protrusion is used for being engaged with one end of the spring.

The spring base 5 comprises a spring base body 51 and a spring base projection 52 arranged on one surface of the spring base body, the spring base projection cooperating with the other end of the spring. After the sliding block, the spring and the spring base are assembled, the sliding block, the spring and the spring base are installed in the shell, the sliding block is connected with the sliding block deflector rod, and the performance of the spring is selected according to actual pressure regulating requirements.

The cover plate 8 is of a flat plate structure, the material of the cover plate can be aluminum or steel, and through holes corresponding to the mounting holes 107 of the shell are formed in the periphery of the cover plate and used for allowing fixing bolts to penetrate through.

The application relates to the operating principle of a variable displacement rotor oil pump

The variable principle of the oil pump of the scheme is that the volumetric efficiency of the oil pump is changed by adjusting the position of a pump cavity on the pressure regulating plate. In an initial state, the pressure regulating plate high-pressure cavity on the pressure regulating plate is completely overlapped with the shell high-pressure cavity on the shell, and at the moment, the oil pump has the highest volumetric efficiency and the strongest performance. Along with the pressurized rotation of pressure regulating board, the casing high-pressure chamber on pressure regulating board and the casing high-pressure chamber on the casing form the dislocation, and the rotor is in the in-process of oil delivery, between casing high-pressure chamber and the casing low-pressure chamber on the casing, all has partial intercommunication between pressure regulating board high-pressure chamber and the pressure regulating board low-pressure chamber on the pressure regulating board, and the volumetric efficiency of oil pump reduces this moment, and the performance reduces. The larger the rotation angle of the pressure regulating plate is, the more serious the dislocation of the pump cavity is, and the more the performance of the oil pump is reduced.

As shown in fig. 7, in the initial state of the oil pump, the spring presses the slider to the uppermost end (maximum displacement point), the position of the pump cavity on the pressure regulating plate is consistent with the position of the pump cavity of the housing, and the rotor operates in the maximum displacement state during the operation and oil transportation process, that is, the oil pump has the maximum displacement and the strongest performance (high displacement mode).

Along with the rise of the rotating speed of the engine, the pressure of an oil outlet of the oil pump is gradually increased, the pressure of the engine oil in the feedback cavity on the shell is also continuously increased, and when the pressure acting on the upper surface of the sliding block is larger than the elastic force of the spring, the engine oil pushes the sliding block to move. At the moment, the sliding block pushes the pressure adjusting plate to rotate, and the rotating angle depends on the pressure in the feedback oil cavity. When the pressure regulating plate rotates, the pump cavity on the pressure regulating plate and the pump cavity on the shell are staggered, the inner rotor and the outer rotor are communicated at the maximum volume part of the inner rotor and the outer rotor in the oil transportation process, the high-pressure cavity and the low-pressure cavity of the shell are communicated through the high-pressure cavity and the low-pressure cavity of the pressure regulating plate on the pressure regulating plate, the larger the dislocation angle is, the stronger the communication degree is, the more the oil transportation capacity of the rotor is reduced, the repeated operation is carried out, and finally the slide block is balanced at a stable set position. When the pressure regulating plate is in a dislocation state, the oil delivery resistance of the rotor is reduced, namely when the performance of the oil pump is reduced, a part of hydraulic power can be saved, and the shaft power given by an engine cannot be wasted.

Because the shell is provided with the slide block limiting structure, when the pressure of the outlet of the pump is high to a certain degree, the slide block moves to the minimum displacement point and cannot move continuously. The problem that the performance of the instantaneous oil pump is too low can be prevented.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.