Automobile vacuum pump with noise suppression function

Abstract

The utility model relates to the technical field of automobile vacuum pumps, in particular to an automobile vacuum pump with a noise suppression function, which is characterized in that an eccentric wheel is arranged at the upper position of a pump body, so that the sizes of air cavities are unequal, the air cavity at the upper part of the right side of a motor moves downwards along with the rotation of an impeller, the volume is increased, and the pressure is reduced; when the air cavity is communicated with the air inlet, air outside the pump cavity is sucked into the pump cavity through the air inlet; the air cavity on the lower portion of the left side of the motor moves upwards, the size is decreased, air is compressed, the pressure intensity is increased, when the air cavity is communicated with the exhaust port, the air in the air cavity is discharged out of the pump cavity through the exhaust port, the purpose of vacuumizing is achieved, when noise is transmitted to the perforated plate, air in the perforated plate and fine fibers of materials vibrate, and therefore noise is reduced. Due to the friction resistance between the air and the hole wall, the viscous resistance of the air, heat conduction and the like, a considerable part of sound energy can be converted into heat energy to be dissipated, so that the effects of absorbing sound and reducing noise are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile vacuum pumps, in particular to an automobile vacuum pump with a noise suppression function. Background Art

[0002] The car vacuum pump is also called the power-assisted pump. It is a power-assisted device for the brake system and steering system. As the name implies, the vacuum pump is used to generate vacuum. Generally, small cars have hydraulic power-assisted brakes, while large trucks or buses usually have pneumatic power-assisted brakes. The vacuum pump equipped in the vehicle can generate negative pressure, thereby increasing the pressure required by the vehicle. The vacuum pump on the car is also called the power-assisted pump. These power-assisted pumps are responsible for the power-assisted devices of various systems such as the vehicle's brake system and steering system. For example, the steering power-assisted function and the hydraulic brake function equipped in the vehicle both require the vehicle's vacuum pump to provide negative pressure.

[0003] With the development of vacuum applications, many types of vacuum pumps have been developed, and their pumping speeds range from a few tenths of a liter per second to hundreds of thousands or millions of liters per second. However, most vacuum pumps on the market have a common disadvantage - the noise is relatively loud, which is difficult for people in some confined spaces to endure. For example, in a car, not only is the space small, but the interference time is also long, which can easily make the driver and passengers feel irritable and even induce traffic accidents. The current method of sound absorption and noise reduction is to wrap a layer of foam paper on the surface of the vacuum pump. This method not only has limited sound absorption, but is also not conducive to the heat dissipation of the vacuum pump, thus reducing its service life. Utility Model Content

[0004] The main purpose of the utility model is to provide an automobile vacuum pump with a noise suppression function to solve the problems in the related art of limited sound absorption, poor heat dissipation of the vacuum pump, and reduced service life of the vacuum pump.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, there is provided an automobile vacuum pump with a noise suppression function, comprising a pump body, the pump body comprising a pump barrel, the pump barrel comprising a pump chamber, a pump barrel inner wall is arranged outside the pump chamber, a porous plate is arranged outside the pump barrel inner wall, the porous plate is fixedly connected to the pump barrel inner wall, a pump barrel outer wall is arranged outside the porous plate, the pump barrel outer wall is fixedly connected to the porous plate, pump covers are arranged at both ends of the pump body, the pump cover is fixedly connected to the pump body, a water inlet is arranged above the middle of the pump cover, the water inlet is fixedly connected to the pump cover, the water inlet passes through the pump cover and is connected with the pump chamber, a water inlet cover is arranged on the water inlet, the water inlet cover is threadedly connected to the water inlet, an air inlet is arranged on the left side of the pump cover, the air inlet passes through the pump cover and is connected with the pump chamber, an exhaust port is arranged on the right side of the pump cover, the exhaust port passes through the pump cover and is connected with the pump chamber.

[0006] Furthermore, an eccentric wheel is provided in the pump body, the eccentric wheel is provided above the center of the pump body, and the eccentric wheel is fixedly connected to the pump body.

[0007] Furthermore, the eccentric wheel includes an impeller, a rotating shaft is provided at the center of the impeller, and a shaft body of the rotating shaft is fixedly connected to the impeller.

[0008] Furthermore, a motor is provided at one end of the rotating shaft, and the motor is fixedly connected to the rotating shaft.

[0009] Furthermore, the motor passes through the pump cover and is fixedly connected to the pump cover, a switch is provided at the top of the motor, the switch is electrically connected to the motor, and the switch is fixedly connected to the motor.

[0010] Furthermore, the pump cavity is filled with water, and the water forms a water ring when rotating in the pump cavity.

[0011] Furthermore, an air cavity is formed in the center of the water ring, and the air cavity is closed and divided into several parts of different sizes by the water ring and the impeller.

[0012] Compared with the prior art, the utility model has the following beneficial effects: since the eccentric wheel is arranged at the upper position of the pump body, the sizes of the air chambers are not equal. With the rotation of the impeller, the air chamber at the upper right side of the motor moves downward, the volume becomes larger, and the pressure becomes smaller. When the air chamber is connected with the air inlet, the air outside the pump chamber is sucked into the pump chamber through the air inlet; the air chamber at the lower left side of the motor moves upward, the volume becomes smaller, the air is compressed, and the pressure becomes larger. When the air chamber is connected with the exhaust port, the air in the air chamber is discharged to the outside of the pump chamber through the exhaust port. The whole process can be simplified into three steps: suction, compression, and exhaust. The impeller rotates continuously, suction, compression, and exhaust. The exhaust will circulate to achieve the purpose of vacuuming; when the impeller drives the water to rotate, noise will be emitted, and the noise causes the inner wall of the pump barrel to vibrate, further transmitting the noise outward. When the noise reaches the porous plate, it causes the fine fibers of air and materials in the porous plate to vibrate. Due to the friction resistance between the air and the hole wall, the viscous resistance of the air and the heat conduction, a considerable part of the sound energy will be converted into heat energy and dissipated, thereby playing a role in sound absorption and noise reduction, reducing the sound energy that continues to be transmitted outward, reducing or even eliminating the interference to the driver and passengers, and there is no need to wrap the vacuum pump with foam paper, which will not affect the heat dissipation of the vacuum pump and will not reduce the service life of the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall schematic diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the external structure of the pump body of the utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the pump body of the utility model;

[0017] Figure 5 This is a schematic diagram of the eccentric wheel structure of the utility model;

[0018] Figure 6 This is a working principle diagram of the utility model.

[0019] Illustration Description:

[0020] 1. Pump body; 101. Pump barrel; 102. Water inlet; 103. Water inlet cover; 104. Air inlet; 105. Air outlet; 106. Pump cover; 1011. Pump cavity; 1012. Inner wall of pump barrel; 1013. Perforated plate; 1014. Outer wall of pump barrel;

[0021] 2. Eccentric wheel; 201. Impeller; 202. Rotating shaft; 203. Motor; 204. Switch; 205. Air cavity; 206. Water ring. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0023] See also Figures 1 to 6The present embodiment provides an automobile vacuum pump with noise suppression function, including a pump body 1, the pump body 1 including a pump barrel 101, the pump barrel 101 including a pump chamber 1011, providing space for the rotation of the eccentric wheel 2, a pump barrel inner wall 1012 is arranged outside the pump chamber 1011, protecting the porous plate 1013 from being soaked by water and extending the service life of the porous plate 1013, a porous plate 1013 is arranged outside the pump barrel inner wall 1012, most of the noise generated when the eccentric wheel 2 is working is absorbed and consumed by the porous plate 1013, the porous plate 1013 is fixedly connected to the pump barrel inner wall 1012, a pump barrel outer wall 1014 is arranged outside the porous plate 1013, the porous plate 1013 is separated from the outside world, and the porous plate 1013 is prevented from being damaged by external force and losing the function of sound absorption and noise reduction, the pump barrel outer wall 1014 and the porous plate 1013 Fixedly connected, pump covers 106 are provided at both ends of the pump body 1 to provide a closed space for the pump chamber 1011, the pump cover 106 is fixedly connected to the pump body 1, a water inlet 102 is provided at the upper middle part of the pump cover 106, water enters the pump chamber 1011 through the water inlet 102, the water inlet 102 is fixedly connected to the pump cover 106, the water inlet 102 passes through the pump cover 106 and is connected with the pump chamber 1011, the water inlet 102 is provided with a water inlet cover 103, the water inlet cover 103 is threadedly connected to the water inlet 102, an air inlet 104 is provided on the left side of the pump cover 106, the air inlet 104 passes through the pump cover 106 and is connected with the pump chamber 1011, an exhaust port 105 is provided on the right side of the pump cover 106, the exhaust port 105 passes through the pump cover 106 and is connected with the pump chamber 1011, the air suction and discharge cycle is carried out to achieve the purpose of vacuuming.

[0024] An eccentric wheel 2 is provided in the pump body 1. The eccentric wheel 2 is provided at the upper center of the pump body 1 so that the air cavities 205 formed are of different sizes.

[0025] The eccentric wheel 2 includes an impeller 201 , a rotating shaft 202 is provided at the center of the impeller 201 , and the rotating shaft 202 is rotatably arranged in the pump body 1 . The rotating shaft 202 drives the impeller 201 to rotate, so that the water forms a water ring 206 . The shaft body of the rotating shaft 202 is fixedly connected to the impeller 201 .

[0026] A motor 203 is provided at one end of the rotating shaft 202 . The motor 203 is fixedly connected to the rotating shaft 202 , and the motor 203 drives the rotating shaft 202 to rotate.

[0027] The motor 203 passes through the pump cover 106 and is fixedly connected to the pump cover 106 . A switch 204 is provided at the top of the motor 203 . The switch 204 is electrically connected to the motor 203 . The switch 204 is fixedly connected to the motor 203 . The switch 204 controls the working state of the motor 203 .

[0028] The pump chamber 1011 is filled with water, and when the water rotates in the pump chamber 1011 , a water ring 206 is formed to seal the air chamber 205 .

[0029] An air cavity 205 is formed at the center of the water ring 206. The air cavity 205 is closed and divided into a number of parts of different sizes by the water ring 206 and the impeller 201. As the impeller 201 rotates, the air pressure in the air cavity 205 changes continuously, thereby completing air intake and exhaust.

[0030] Unscrew the water inlet cover 103, add a proper amount of water to the pump chamber 1011 through the water inlet 102, and screw on the water inlet cover 103 after the water is added; press the switch 204 to start the motor 203, the motor 203 starts to rotate in the clockwise direction, the shaft 202 follows the motor 203 to drive the impeller 201 to rotate together, the impeller 201 drives the water in the pump chamber 1011 to do a circular motion, and under the action of centrifugal force, the water is thrown to the inner wall 1012 of the pump barrel to form a water ring 206, and the air inside the water ring 206 is driven by the impeller The impeller 201 is divided into a plurality of air cavities 205, and the air cavities 205 are closed by the water ring 206 and the impeller 201 to form a closed space. Since the eccentric wheel 2 is arranged at an upper position of the pump body 1, the sizes of the air cavities 205 are not equal. With the rotation of the impeller 201, the air cavity 205 on the upper right side of the motor 203 moves downward, the volume increases, and the pressure decreases. When the air cavity 205 is connected with the air inlet 104, the air outside the pump cavity 1011 is sucked into the pump cavity 1011 through the air inlet 104; the motor 203 The air cavity 205 at the lower left side moves upward, the volume becomes smaller, the air is compressed, and the pressure increases. When the air cavity 205 is connected with the exhaust port 105, the air in the air cavity 205 is discharged to the outside of the pump cavity 1011 through the exhaust port 105. The whole process can be simplified into three steps: suction, compression, and exhaust. The impeller 201 rotates continuously, and the suction, compression, and exhaust will be cyclically carried out to achieve the purpose of vacuuming. When the impeller 201 drives the water to rotate, noise will be emitted, and the noise will cause the inner wall 1012 of the pump barrel to vibrate, thereby The noise is transmitted outward in one step. When the noise reaches the porous plate 1013, the fine fibers of the air and materials in the porous plate 1013 are caused to vibrate. Due to the friction resistance between the air and the hole wall, the viscous resistance of the air and the heat conduction, a considerable part of the sound energy will be converted into heat energy and dissipated, thereby playing a role in sound absorption and noise reduction, reducing the sound energy that continues to be transmitted outward, and reducing or even eliminating the interference to the driver and passengers. There is no need to wrap the vacuum pump with foam paper, which will not affect the heat dissipation of the vacuum pump and will not reduce the service life of the vacuum pump.

[0031] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automobile vacuum pump with noise suppression function, comprising a pump body (1), wherein the pump body (1) comprises a pump barrel (101), characterized in that: The pump barrel (101) comprises a pump chamber (1011), a pump barrel inner wall (1012) is arranged outside the pump chamber (1011), a porous plate (1013) is arranged outside the pump barrel inner wall (1012), the porous plate (1013) is fixedly connected to the pump barrel inner wall (1012), a pump barrel outer wall (1014) is arranged outside the porous plate (1013), the pump barrel outer wall (1014) is fixedly connected to the porous plate (1013), pump covers (106) are arranged at both ends of the pump body (1), the pump cover (106) is fixedly connected to the pump body (1), and a water inlet (102) is arranged at the upper middle portion of the pump cover (106). ), the water inlet (102) is fixedly connected to the pump cover (106), the water inlet (102) passes through the pump cover (106) and is in communication with the pump chamber (1011), the water inlet (102) is provided with a water inlet cover (103), the water inlet cover (103) is threadedly connected to the water inlet (102), an air inlet (104) is provided on the left side of the pump cover (106), the air inlet (104) passes through the pump cover (106) and is in communication with the pump chamber (1011), and an exhaust port (105) is provided on the right side of the pump cover (106), the exhaust port (105) passes through the pump cover (106) and is in communication with the pump chamber (1011).

2. The automobile vacuum pump with noise suppression function according to claim 1, characterized in that: An eccentric wheel (2) is provided in the pump body (1); the eccentric wheel (2) is provided above the center of the pump body (1); and the eccentric wheel (2) is fixedly connected to the pump body (1).

3. The automobile vacuum pump with noise suppression function according to claim 2, characterized in that: The eccentric wheel (2) comprises an impeller (201), a rotating shaft (202) is provided at the center of the impeller (201), and the shaft body of the rotating shaft (202) is fixedly connected to the impeller (201).

4. The automobile vacuum pump with noise suppression function according to claim 3, characterized in that: A motor (203) is provided at one end of the rotating shaft (202), and the motor (203) is fixedly connected to the rotating shaft (202).

5. The automobile vacuum pump with noise suppression function according to claim 4, characterized in that: The motor (203) passes through the pump cover (106) and is fixedly connected to the pump cover (106); a switch (204) is provided at the top of the motor (203); the switch (204) is electrically connected to the motor (203); and the switch (204) is fixedly connected to the motor (203).

6. The automobile vacuum pump with noise suppression function according to claim 5, characterized in that: The pump chamber (1011) is filled with water, and the water forms a water ring (206) when rotating in the pump chamber (1011).

7. The automobile vacuum pump with noise suppression function according to claim 6, characterized in that: An air cavity (205) is formed at the center of the water ring (206), and the air cavity (205) is closed and divided into a plurality of parts of different sizes by the water ring (206) and the impeller (201).

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