Low-noise roots vacuum pump

Abstract

The utility model belongs to the technical field of Roots vacuum pumps, and discloses a low-noise Roots vacuum pump which comprises a pump body, a driving motor and a silencer arranged on the pump body, two mutually meshed rotors are arranged in the pump body, and the rotors are driven by the driving motor to rotate; a shell of the pump body is of a double-layer structure, the double-layer structure comprises an inner layer, an outer layer and a damping material used for absorbing and isolating noise, the inner layer is made of high-strength alloy steel, the outer layer is made of sound-absorbing composite materials, the damping material is filled between the inner layer and the outer layer, an air inlet and an air outlet are formed in the pump body, and the silencer comprises an air inlet silencer and an air outlet silencer. The air inlet silencer is installed in the air inlet, the exhaust silencer is installed in the exhaust port, the surface of the rotor is precisely machined and coated with a low-friction-coefficient coating, and the driving motor is a low-noise variable frequency motor. Noise in the pump body can be effectively isolated and absorbed, and the noise reduction effect is good.

Description

Technical Field

[0001] This utility model relates to the field of Roots vacuum pump technology, and in particular to a low-noise Roots vacuum pump. Background Technology

[0002] The Roots vacuum pump is a large-volume, high-precision vacuum pump with a large compression ratio. It uses a pair of coaxial hollow multi-blade rotors, a fixed housing, and a small-gap closed inlet and outlet passage. The rotors move synchronously in a linear motion, thereby generating continuous exhaust.

[0003] Traditional Roots vacuum pumps generate considerable noise during operation, especially at high speeds. This not only affects the working environment but may also adversely impact the health of operators. Therefore, we have proposed a low-noise Roots vacuum pump. Utility Model Content

[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.

[0005] Specifically, the technical problem to be solved by this utility model is to provide a low-noise Roots vacuum pump to solve the technical problem that the current Roots vacuum pumps generate a lot of noise during operation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A low-noise Roots vacuum pump includes a pump body, a drive motor, and a silencer installed on the pump body. The pump body has two meshing rotors, which are driven to rotate by the drive motor.

[0008] The pump body has a double-layer structure, which includes an inner layer, an outer layer, and a damping material for absorbing and isolating noise. The inner layer is made of high-strength alloy steel, the outer layer is made of sound-absorbing composite material, and the damping material is filled between the inner and outer layers.

[0009] As an improved technical solution, the pump body is provided with an air inlet and an exhaust outlet, and the silencing device includes an air intake silencer and an exhaust silencer, with the air intake silencer installed inside the air intake and the exhaust silencer installed inside the exhaust outlet, further reducing airflow noise.

[0010] As an improved technical solution, the surface of the rotor is precision machined and coated with a low-friction coefficient coating to reduce frictional noise between the rotor and the pump body.

[0011] As an improved technical solution, the drive motor adopts a low-noise variable frequency motor, which reduces the vibration and noise during motor operation through variable frequency control.

[0012] As an improved technical solution, the damping material is one of natural rubber, polyurethane, glass fiber, asbestos fiber, and composite materials. Various types can be customized according to needs, and it has a wide range of applications.

[0013] As an improved technical solution, the base of the pump body is provided with a shock-absorbing pad to absorb the vibration transmission between the pump body and the ground, thereby further reducing noise.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are:

[0015] 1. This utility model effectively isolates and absorbs noise inside the pump body through the application of a double-layer pump body structure and damping materials.

[0016] 2. This utility model significantly reduces airflow noise by setting an intake muffler and an exhaust muffler at the intake and exhaust ports respectively.

[0017] 3. This utility model reduces friction and vibration noise by using a rotor surface coating and a low-noise motor.

[0018] 4. The overall structure of this utility model is simple and easy to maintain, making it suitable for industrial environments with high noise requirements. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall bottom view of the present invention.

[0022] Figure 3 This is a schematic diagram of the outer shell structure of the pump body of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] In the diagram: 1. Pump body; 101. Inner layer; 102. Outer layer; 103. Damping material; 2. Drive motor; 3. Air inlet; 4. Exhaust outlet; 5. Inlet muffler; 6. Exhaust muffler; 7. Vibration damping pad. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. At the same time, the meaning of "and / or" or "and / or" in the whole text is to include three solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B.

[0026] Reference Figure 1-3 A low-noise Roots vacuum pump is provided, which includes a pump body 1, a drive motor 2 and a silencer installed on the pump body 1. The pump body 1 is provided with two meshing rotors, which are driven to rotate by the drive motor 2.

[0027] The outer shell of the pump body 1 adopts a double-layer structure, which includes an inner layer 101, an outer layer 102, and a damping material 103 for absorbing and isolating noise. The inner layer 101 is made of high-strength alloy steel, the outer layer 102 is made of sound-absorbing composite material, and the damping material 103 is filled between the inner layer 101 and the outer layer 102.

[0028] Reference Figure 1 The pump body 1 is provided with an air inlet 3 and an exhaust outlet 4. The silencing device includes an air intake silencer 5 and an exhaust silencer 6. The air intake silencer 5 is installed inside the air intake 3, and the exhaust silencer 6 is installed inside the exhaust outlet 4 to further reduce airflow noise.

[0029] Reference Figure 1 and Figure 2 The rotor surface is precision machined and coated with a low-friction coefficient coating to reduce frictional noise between the rotor and the pump body 1.

[0030] Reference Figure 1 and Figure 2 The drive motor 2 is a low-noise variable frequency motor, which reduces vibration and noise during motor operation through variable frequency control.

[0031] Reference Figure 3 Damping material 103 is one of natural rubber, polyurethane, glass fiber, asbestos fiber, and composite materials (high-performance materials composed of two or more materials). In application, damping material 103 has many types and forms, and can be customized according to needs, with a wide range of applications.

[0032] Reference Figure 1 and Figure 2 The base of the pump body 1 is equipped with a shock-absorbing pad 7, which is used to absorb the vibration transmission between the pump body 1 and the ground and further reduce noise.

[0033] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A low-noise Roots vacuum pump, characterized in that: It includes a pump body (1), a drive motor (2) and a silencer installed on the pump body (1). The pump body (1) is provided with two meshing rotors, which are driven to rotate by the drive motor (2). The outer shell of the pump body (1) adopts a double-layer structure, which includes an inner layer (101), an outer layer (102), and a damping material (103) for absorbing and isolating noise. The inner layer (101) is high-strength alloy steel, the outer layer (102) is sound-absorbing composite material, and the damping material (103) is filled between the inner layer (101) and the outer layer (102).

2. The low-noise Roots vacuum pump according to claim 1, characterized in that: The pump body (1) is provided with an air inlet (3) and an exhaust outlet (4). The silencing device includes an air intake silencer (5) and an exhaust silencer (6), with the air intake silencer (5) installed inside the air intake (3) and the exhaust silencer (6) installed inside the exhaust outlet (4).

3. The low-noise Roots vacuum pump according to claim 1, characterized in that: The surface of the rotor is precision machined and coated with a low-friction coefficient coating.

4. The low-noise Roots vacuum pump according to claim 1, characterized in that: The drive motor (2) is a low-noise variable frequency motor.

5. The low-noise Roots vacuum pump according to claim 1, characterized in that: The damping material (103) is one of natural rubber, polyurethane, glass fiber, asbestos fiber, and composite materials.

6. The low-noise Roots vacuum pump according to claim 5, characterized in that: The base of the pump body (1) is provided with a shock-absorbing pad (7).

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