Silencer for electric diaphragm vacuum pump and vacuum pump
By designing an electric diaphragm vacuum pump muffler with waterproof function, the ventilation holes of the middle plate and the drainage groove of the upper cover flange combined with the second line of defense of the lower cover plate, the problem of the lack of waterproof function of the existing muffler is solved, and the effective waterproof effect under wading conditions is achieved.
Patent Information
- Application Number
- CN202422034477.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The existing electric diaphragm vacuum pump mufflers lack waterproofing function, which leads to prone to water inflow when wading through water sections, which may lead to rust and degradation of bearing performance.
A silencer including a lower cover, a one-way valve plate, a middle plate, annular silencer, a semi-ring silencer and an upper cover is designed. A vent hole is provided on the boss of the middle plate, and drainage is achieved through the drainage groove of the upper cover flange. The lower cylinder on the lower cover plate forms a second line of defense to prevent water from entering the vacuum pump.
Effectively prevent water from entering the vacuum pump through the silencer, ensure that the vacuum pump can still operate normally under wading conditions, and avoid bearing rust and performance degradation.
Smart Images
Figure CN222772322U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the relevant technical fields such as vacuum pumps, and in particular to a muffler for an electric diaphragm vacuum pump and a vacuum pump. Background Art
[0002] The electric diaphragm vacuum pump provides vacuum for the brake system, making it easier and more convenient to brake the car. Since its invention, it has been widely used in various industries, such as chemical, automotive, and medical industries, for its high performance, high reliability, low energy consumption, and better adaptability to the environment. The muffler is an important component of the electric diaphragm vacuum pump, which can reduce the noise generated by the vacuum pump when exhausting. However, the muffler in the prior art generally does not have a waterproof function. When the car passes through a flooded section for a long time, the accumulated water on the road will splash onto the vacuum pump and easily enter the vacuum pump through the exhaust hole on the muffler. After the water enters the vacuum pump, it may cause problems such as rust on the bearings and performance degradation. Utility Model Content
[0003] The utility model aims to provide a silencer for an electric diaphragm vacuum pump with a waterproof function, and a vacuum pump using the silencer.
[0004] To achieve the above-mentioned purpose, the technical solution of the silencer of the utility model is: a silencer for an electric diaphragm vacuum pump, comprising a lower cover, a one-way valve sheet, an intermediate plate, annular silencer cotton, semi-annular silencer cotton, and an upper cover; the lower cover comprises a lower cover plate, a lower cover annular wall, and a lower cover flange, the lower cover plate is arranged at the lower end of the lower cover annular wall, the lower cover flange is arranged at the upper end of the lower cover annular wall, the upper surface of the lower cover plate is provided with an upwardly protruding lower cylinder and a lower center column, the lower center column is located in the lower cylinder, the lower cover plate is provided with an air inlet hole corresponding to the position between the lower cylinder and the lower center column, and the upper end of the lower cylinder is provided with a plurality of radial exhaust grooves; the intermediate plate is a circular plate, the lower surface of the intermediate plate is provided with a downward hollow pipe column, the upper surface of the intermediate plate is provided with an upward boss, and the boss is provided with a through hole penetrating the intermediate plate as a vent; the upper cover comprises an upper cover plate, an upper cover annular wall, and an upper cover flange, the upper cover plate is arranged at the upper end of the upper cover annular wall, the upper cover method The flange is arranged at the lower end of the annular wall of the upper cover, and the lower surface of the upper cover plate is provided with an upper cylinder and an upper center column protruding downward, the upper center column is located in the upper cylinder, and an exhaust hole is provided on the annular wall of the upper cover; the one-way valve sheet is sleeved on the lower center column to cover the air inlet hole, and the annular silencer cotton is embedded in the annular cavity between the annular wall of the lower cover and the lower cylinder; the middle plate is located between the upper cover and the lower cover, and the hollow pipe column of the middle plate can be nested with the lower center column, and the lower end surface of the hollow pipe column abuts on the one-way valve sheet to make it close to the upper surface of the lower cover plate, and the upper cylinder of the upper cover and the upper center column abut on the upper surface of the middle plate; the upper cover flange and the lower cover flange clamp the periphery of the middle plate and are fixed by screws, and a drainage groove is provided on the lower surface of the upper cover flange, and the semi-annular silencer cotton is embedded in the annular cavity between the annular wall of the upper cover and the upper cylinder and covers the exhaust hole, and the boss of the middle plate is located in the annular cavity between the annular wall of the upper cover and the upper cylinder and away from the exhaust hole.
[0005] Preferably, the position of the vent holes on the intermediate plate boss is higher than the height of the exhaust holes on the upper cover.
[0006] Preferably, the intermediate plate is made of EPDM.
[0007] Preferably, the lower cylinder, the lower center column, the hollow tube column, the upper cylinder and the upper center column are all concentrically arranged.
[0008] Furthermore, a circle of annular groove is provided on the periphery of the middle plate, and a convex ring matching with the annular groove is provided on the lower surface of the upper cover flange.
[0009] Furthermore, the lower cover flange is provided with a plurality of upward positioning pins, and the upper cover flange is provided with pin holes corresponding to the positioning pins.
[0010] Based on the same inventive concept, the utility model also provides an electric diaphragm vacuum pump using the above-mentioned silencer.
[0011] The silencer provided by the utility model has the advantages of simple structure, convenient installation and strong practicality. Since the boss of the middle plate is provided with a vent hole, the boss of the middle plate after installation is located in the annular cavity between the annular wall of the upper cover and the upper cylinder and away from the vent hole, and the lower surface of the upper cover flange is provided with a drainage groove, so that when a small amount of water enters the upper cover through the vent hole of the upper cover, it will not continue to flow downward into the lower cover through the vent hole of the boss, but will be discharged outward through the drainage groove of the upper cover flange, thereby effectively preventing water from entering the vacuum pump through the silencer; when a lot of water enters the upper cover through the vent hole of the upper cover and overflows the height of the boss of the middle plate, it continues to flow downward into the lower cover through the vent hole of the boss, and the lower cylinder on the lower cover plate constitutes a second line of defense, which can prevent water from flowing downward into the pump body of the vacuum pump through the air inlet hole. After the vehicle leaves the wading section, as the vacuum pump exhausts, the water in the lower cover of the silencer will be discharged into the upper cover along with the gas, and then the drainage is completed through the drainage groove of the upper cover flange, thereby achieving a waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the explosion structure of the silencer for the electric diaphragm vacuum pump in the embodiment of the utility model;
[0013] Figure 2 It is an exploded view of a silencer for an electric diaphragm vacuum pump in an embodiment of the utility model;
[0014] Figure 3 It is a cross-sectional view of a silencer for an electric diaphragm vacuum pump in an embodiment of the utility model;
[0015] Figure 4 This is a schematic diagram of the internal structure of the lower cover in the embodiment of the utility model;
[0016] Figure 5 This is a schematic diagram of the lower surface structure of the middle plate in the embodiment of the utility model;
[0017] Figure 6 This is a schematic diagram of the internal structure of the upper cover in the embodiment of the utility model;
[0018] The accompanying drawings are marked as follows: 10, lower cover; 11, lower cover plate; 12, lower cover annular wall; 13, lower cover flange; 14, lower cylinder; 15, lower center column; 16, positioning pin; 17, air inlet; 18, exhaust groove; 20, one-way valve plate; 30, annular silencer cotton; 40, middle plate; 41, hollow pipe column; 42, boss; 43, vent; 44, annular groove; 50, semi-annular silencer cotton; 60, upper cover; 61, upper cover plate; 62, upper cover annular wall; 63, upper cover flange; 64, exhaust hole; 65, upper cylinder; 66, upper center column; 67, drain groove. DETAILED DESCRIPTION
[0019] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.
[0020] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Example
[0021] like Figures 1 to 6The silencer for an electric diaphragm vacuum pump shown in the figure comprises a lower cover 10, a one-way valve plate 20, an intermediate plate 40, an annular silencer cotton 30, a semi-annular silencer cotton 50, and an upper cover 60; the lower cover 10 comprises a lower cover plate 11, a lower cover annular wall 12, and a lower cover flange 13, the lower cover plate 11 is arranged at the lower end of the lower cover annular wall 12, the lower cover flange 13 is arranged at the upper end of the lower cover annular wall 12, the upper surface of the lower cover plate 11 is provided with an upwardly protruding lower cylinder 14 and a lower center column 15, the lower center column 15 is located in the lower cylinder 14, and the lower cover plate 11 corresponds to the space between the lower cylinder 14 and the lower center column 15 An air inlet 17 is provided at the position, and a plurality of radial exhaust grooves 18 are provided at the upper end of the lower cylinder 14; the middle plate 40 is a circular plate made of EPDM, and a downward hollow tube column 41 is provided on the lower surface of the middle plate 40, and an upward boss 42 is provided on the upper surface of the middle plate 40, and the boss 42 is provided with a through hole penetrating the middle plate 40 as a vent hole 43; the upper cover 60 includes an upper cover plate 61, an upper cover annular wall 62, and an upper cover flange 63, the upper cover plate 61 is arranged at the upper end of the upper cover annular wall 62, the upper cover flange 63 is arranged at the lower end of the upper cover annular wall 62, and the lower end of the upper cover plate 61 is provided. The surface is provided with an upper cylinder 65 and an upper center column 66 protruding downward, the upper center column 66 is located in the upper cylinder 65, the upper cover annular wall 62 is provided with an exhaust hole 64, the vent hole 43 on the boss 42 is higher than the exhaust hole 64 of the upper cover 60; the one-way valve plate 20 is sleeved on the lower center column 15 to cover the air inlet 17, and the annular silencer cotton 30 is embedded in the annular cavity between the lower cover annular wall 12 and the lower cylinder 14; the middle plate 40 is located between the upper cover 60 and the lower cover 10, and the hollow tube column 41 of the middle plate 40 can be nested with the lower center column 15, and the lower end surface of the hollow tube column 41 It abuts against the one-way valve plate 20 so that it is close to the upper surface of the lower cover plate 11, and the upper cylinder 65 and the upper center column 66 of the upper cover 60 abut against the upper surface of the middle plate 40; the upper cover flange 63 and the lower cover flange 13 clamp the periphery of the middle plate 40 and fix them by screws, and the lower surface of the upper cover flange 63 is provided with two symmetrical drainage grooves 67, and the semi-annular silencer cotton 50 is embedded in the annular cavity between the upper cover annular wall 62 and the upper cylinder 65 and covers the exhaust hole 64, and the boss 42 of the middle plate 40 is located in the annular cavity between the upper cover annular wall 62 and the upper cylinder 65 and away from the exhaust hole 64.
[0022] Since the vent hole 43 is provided on the boss 42 of the middle plate 40, the boss 42 of the middle plate after installation is located in the annular cavity between the upper cover annular wall 62 and the upper cylinder 65 and away from the exhaust hole 64, and the lower surface of the upper cover flange 63 is provided with a drainage groove 67. In this way, when a small amount of water enters the upper cover 60 through the exhaust hole 64 of the upper cover 60, it will not continue to flow downward into the lower cover 10 through the vent hole 43 of the boss 42, but will be discharged outward through the drainage groove 67 of the upper cover flange 63, thereby effectively preventing water from entering the vacuum pump through the muffler; A lot of water enters the upper cover 60 through the exhaust holes 64 of the upper cover 60 and overflows the height of the middle plate boss 42, and continues to flow downward into the lower cover 10 through the vent holes 43 of the boss 42. The lower cylinder 14 on the lower cover plate 11 constitutes a second line of defense, which can prevent water from flowing downward into the pump body of the vacuum pump through the air inlet hole 17. After the vehicle leaves the flooded section, as the vacuum pump exhausts, the water in the muffler lower cover 10 will be discharged into the upper cover 60 along with the gas, and then drained through the drainage groove 67 of the upper cover flange 63, thereby achieving a waterproof effect.
[0023] As a preferred solution, the lower cylinder 14, the lower center column 15, the hollow tube column 41, the upper cylinder 65 and the upper center column 66 are all concentrically arranged and located in the middle of the muffler; in order to ensure the concentricity of the components of the upper cover 60, the middle plate 40 and the lower cover 10, a circle of annular grooves 44 are provided on the periphery of the middle plate 40, and a convex ring matching the annular groove 44 is provided on the lower surface of the upper cover flange 63, and a plurality of upward positioning pins 16 are provided on the lower cover flange 13, and pin holes corresponding to the positioning pins 16 are provided on the upper cover flange 63. Example
[0024] A vacuum pump comprises a motor, a connecting rod, and a diaphragm, and adopts the silencer for the electric diaphragm vacuum pump in Example 1.
[0025] In order to make it easier for ordinary technicians in this field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiments are better implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.
Claims
1. A muffler for an electric diaphragm vacuum pump, characterized in that: The silencer comprises a lower cover (10), a one-way valve plate (20), an intermediate plate (40), an annular silencer cotton (30), a semi-annular silencer cotton (50), and an upper cover (60); the lower cover (10) comprises a lower cover plate (11), a lower cover annular wall (12), and a lower cover flange (13); the lower cover plate (11) is arranged at the lower end of the lower cover annular wall (12); the lower cover flange (13) is arranged at the upper end of the lower cover annular wall (12); an upwardly protruding lower cylinder (14) and a lower center column (15) are provided on the upper surface of the lower cover plate (11); the lower center column (15) is located in the lower cylinder (14); the lower cover plate (11) corresponds to the lower cylinder (14) and the lower center column (15) An air inlet (17) is provided at a position between the upper and lower cylinders (14); a plurality of radial exhaust grooves (18) are provided at the upper end of the lower cylinder (14); the intermediate plate (40) is a circular plate; a downwardly directed hollow tube column (41) is provided on the lower surface of the intermediate plate (40); an upwardly directed boss (42) is provided on the upper surface of the intermediate plate (40); a through hole (43) is provided on the boss (42) that penetrates the intermediate plate (40); the upper cover (60) comprises an upper cover plate (61), an upper cover annular wall (62), and an upper cover flange (63); the upper cover plate (61) is arranged at the upper end of the upper cover annular wall (62); the upper cover flange (63) is arranged at the lower end of the upper cover annular wall (62); The lower surface of the plate (61) is provided with an upper cylinder (65) and an upper center column (66) protruding downward, the upper center column (66) is located in the upper cylinder (65), and an exhaust hole (64) is provided on the annular wall (62) of the upper cover; the one-way valve plate (20) is sleeved on the lower center column (15) to cover the air inlet hole (17), and the annular silencer cotton (30) is embedded in the annular cavity between the annular wall (12) of the lower cover and the lower cylinder (14); the intermediate plate (40) is located between the upper cover (60) and the lower cover (10), and the hollow tube column (41) of the intermediate plate (40) can be nested with the lower center column (15), and the lower end surface of the hollow tube column (41) abuts against the one-way valve. The upper cover (20) is placed on the upper surface of the lower cover (11), and the upper cylinder (65) and the upper center column (66) of the upper cover (60) are in contact with the upper surface of the middle plate (40); the upper cover flange (63) and the lower cover flange (13) clamp the periphery of the middle plate (40) and fix them by screws; the lower surface of the upper cover flange (63) is provided with a drainage groove (67); the semi-annular sound-absorbing cotton (50) is embedded in the annular cavity between the upper cover annular wall (62) and the upper cylinder (65) and covers the exhaust hole (64); the boss (42) of the middle plate (40) is located in the annular cavity between the upper cover annular wall (62) and the upper cylinder (65) and is away from the exhaust hole (64).
2. The muffler for an electric diaphragm vacuum pump according to claim 1, characterized in that: The vent hole (43) on the boss (42) of the middle plate (40) is located at a higher height than the exhaust hole (64) of the upper cover (60).
3. The muffler for an electric diaphragm vacuum pump according to claim 1 or 2, characterized in that: The intermediate plate (40) is made of EPDM.
4. The muffler for an electric diaphragm vacuum pump according to claim 1 or 2, characterized in that: The lower cylinder (14), the lower center column (15), the hollow tube column (41), the upper cylinder (65) and the upper center column (66) are all concentrically arranged.
5. The muffler for an electric diaphragm vacuum pump according to claim 1 or 2, characterized in that: The circumference of the intermediate plate (40) is provided with a circle of annular grooves (44), and the lower surface of the upper cover flange (63) is provided with a convex ring that matches the annular grooves (44).
6. The muffler for an electric diaphragm vacuum pump according to claim 1 or 2, characterized in that: The lower cover flange (13) is provided with a plurality of upward positioning pins (16), and the upper cover flange (63) is provided with pin holes corresponding to the positioning pins (16).
7. A vacuum pump, comprising a motor, a connecting rod, and a diaphragm, characterized in that: It also includes a silencer for an electric diaphragm vacuum pump according to any one of claims 1 to 6.