Multi-stage roots vacuum pump

Abstract

The invention discloses a multi-stage roots vacuum pump which comprises a main machine body, a vacuum pump, a vacuum pump and a vacuum pump, and a rotor is arranged in the main machine body; the scavenging plate is arranged on one side of the main machine body; the motor is arranged on the scavenging plate and is in transmission connection with the rotor; the gear box is arranged on the other side of the main machine body and is in transmission connection with the rotor; wherein an air inlet pipe and an air outlet pipe are arranged at the upper end of the main machine body, and the air inlet pipe is communicated with the air channel in the main machine body. According to the invention, through the design of the six-stage flow channel, the air exhaust speed is higher through six-stage compression, the vacuumizing efficiency is improved, meanwhile, the size of the whole machine can be reduced, and green operation is realized.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pumps, and in particular to a multi-stage Roots vacuum pump. Background Art

[0002] A vacuum pump is a device that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. Common ones include screw vacuum pumps, Roots vacuum pumps, etc. Among them, the Roots vacuum pump mainly realizes the extraction of gas through the relative rotational movement of the rotor in the pump chamber. For example, the Roots vacuum pump housing disclosed in Patent No. CN118601879A has a left chamber and a right chamber; the inner wall surfaces of the left chamber and the right chamber are provided with a plurality of circumferential grooves distributed along the axis direction of the housing, and the circumferential grooves extend from the top wall to the bottom wall of the housing; when the reflux fluid flows to the vicinity of the rotor blade top, the reflux fluid is sucked into the low-pressure area along the circumferential grooves, and is repeatedly pressurized during the rotation of the rotor to form a jet stream.

[0003] In this type of vacuum pump structure, the suction port and exhaust port of the shell are directly connected to the shell, the suction effect is limited, and it is difficult to improve the suction efficiency. Summary of the invention

[0004] The invention aims to avoid the shortcomings of the prior art and provides a multi-stage Roots vacuum pump with high pumping speed.

[0005] The present invention solves the technical problem by adopting the following technical solution: a multi-stage Roots vacuum pump, comprising:

[0006] A main body, wherein a rotor is disposed in the main body;

[0007] A scavenging plate provided on one side of the main fuselage;

[0008] A motor is arranged on the scavenging plate, and the motor is drivingly connected to the rotor;

[0009] A gear box is arranged on the other side of the main body, and the gear box is drivingly connected to the rotor;

[0010] Wherein, an air inlet pipe and an air outlet pipe are arranged at the upper end of the main body, and the air inlet pipe is connected with the gas passage in the main body.

[0011] In several embodiments, the gas flow channel includes a first flow channel, a second flow channel is connected to one side of the first flow channel, a third flow channel is connected to the other side of the first flow channel, a fourth flow channel, a fifth flow channel and a sixth flow channel are sequentially connected to the side of the third flow channel away from the first flow channel, and the first flow channel is connected to the intake pipe.

[0012] In several embodiments, an exhaust channel is disposed on the main body, the exhaust channel is disposed on the side of the gas flow channel, and the exhaust channel is communicated with the gas flow channel.

[0013] In several embodiments, a silencer assembly is disposed in the exhaust passage, and the silencer assembly includes a support frame and a plurality of silencer pipes disposed on the support frame.

[0014] In several embodiments, a plurality of heat sinks are disposed on both upper and lower sides of the main body.

[0015] In several embodiments, the scavenging plate is provided with two axial holes for setting bearings, and the scavenging plate is provided with a connected air inlet and a scavenging channel, the scavenging channel is connected to the two axial holes, and the scavenging channel is used to discharge gas to the axial holes.

[0016] In several embodiments, the scavenging passage includes a first passage and a second passage that are cross-arranged, and the first passage and the second passage lead to two axial holes respectively.

[0017] The effective effects of the present invention are:

[0018] The invention adopts the design of six-stage flow channels and six-stage compression to make the air extraction speed faster, improve the vacuum extraction efficiency, and reduce the size of the whole machine.

[0019] The present invention can reduce working noise by arranging the silencer component.

[0020] The invention can spray the bearing hole position to remove dust by setting the scavenging channel, and adopts nitrogen source, which is green and harmless. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are for illustrative purposes only of selected embodiments and do not represent all possible implementations, and should not be considered to limit the scope of the present invention.

[0022] Figure 1 The structure of the multi-stage Roots vacuum pump in this embodiment is schematically shown;

[0023] Figure 2 Schematically shows Figure 1 The side view structure of

[0024] Figure 3 Schematically shows Figure 1 Partially enlarged structure;

[0025] Figure 4 Schematically shows Figure 3 Amplified structure of the middle silencer assembly;

[0026] Figure 5Schematically shows Figure 3 The enlarged structure of the middle main fuselage;

[0027] Figure 6 Schematically shows Figure 1 The structure of the middle scavenging plate;

[0028] Figure 7 Schematically shows Figure 6 cross-sectional structure. DETAILED DESCRIPTION

[0029] Below, embodiments of the present invention are described in detail with reference to the accompanying drawings. To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in conjunction with the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. All other embodiments obtained by ordinary technicians in the field based on the embodiments of the present invention without making any creative work are within the scope of protection of the present invention.

[0031] like Figure 1-Figure 7 As shown, the multi-stage Roots vacuum pump in this embodiment is mainly composed of a main body 10, a scavenging plate 20 arranged on one side of the main body 10, a motor 30 arranged on the scavenging plate 20, and a gear box 40 arranged on the other side of the main body 10. A rotor and a corresponding gas channel are arranged in the main body 10, and the gas channel is connected to the rotor chamber, that is, the rotor is composed of a plurality of blades. Correspondingly, an air inlet pipe 11 and an air outlet pipe 12 are arranged at the upper end of the main body 10, and the air inlet pipe 11 is connected to the gas channel in the main body 10.

[0032] Specifically, the gas flow channel includes a first flow channel 51, one side of the first flow channel 51 is connected to the second flow channel 52, the other side of the first flow channel 51 is connected to the third flow channel 53, the third flow channel 53 is connected to the fourth flow channel 54, the fifth flow channel 55 and the sixth flow channel 56 in sequence on the side away from the first flow channel 51, and the first flow channel 51 is connected to the intake pipe 11.

[0033] Here, the main body 10 is composed of two upper and lower half shells, and the gas flow channels are distributed on the two half shells. The gas is sucked into the first flow channel 51 from the air inlet pipe 11, and enters the second flow channel 52 after being compressed by the internal rotor chamber, and then enters the third flow channel 53 after being compressed by the rotor chamber, and then enters the fourth flow channel 54 after being compressed by the rotor chamber, and then enters the fifth flow channel 55 after being compressed by the rotor chamber, and then enters the sixth flow channel 56 after being compressed by the rotor chamber, forming six levels of compression and then being discharged from the air outlet pipe 12.

[0034] Correspondingly, an exhaust channel 61 is provided on the main body 10 , and the exhaust channel 61 is provided on the side of the gas flow channel, and the exhaust channel 61 is communicated with the gas flow channel.

[0035] Furthermore, a silencer assembly 70 is disposed in the exhaust passage 61 . The silencer assembly 70 includes a support frame 71 and a plurality of silencer pipes 72 disposed on the support frame 71 .

[0036] In addition, two axial holes 21 are provided on the scavenging plate 20, and the axial holes 21 are used to set bearings. The scavenging plate 20 is provided with a connected air inlet 22 and a scavenging channel. The scavenging channel is connected to the two axial holes 21, and the scavenging channel is used to discharge the gas to the axial holes 21. The air inlet 22 is connected to an external nitrogen source.

[0037] The scavenging channel includes a first channel 231 and a second channel 232 which are cross-arranged. The first channel 231 and the second channel 232 lead to two axial holes 21 respectively. The first channel 231 and the second channel 232 cross to form an X-shaped channel. The air inlet 22 is connected to the center position of the intersection of the two, thereby achieving scavenging of a total of four points of the two axial holes 21.

[0038] Here, a plurality of heat sinks 101 are disposed on both upper and lower sides of the main body 10 to improve the heat dissipation effect.

[0039] All the methods described herein can be performed in any suitable order. Any and all examples used, or exemplary language (such as "for example") provided herein are merely to better illustrate the present invention and are not intended to limit the scope of the present invention, unless the claims are included. The language in the detailed description should not be construed as indicating any essential factors for practicing the present invention that are not claimed.

[0040] The present invention describes preferred embodiments, including the best mode of carrying out the invention known to the inventors. Of course, variations of these preferred embodiments will be apparent to those skilled in the art. The inventors anticipate that the skilled artisan may use such variations as appropriate, and the inventors indicate that the present invention may be implemented in other ways than those specifically described herein. Therefore, the present invention includes all modifications encompassed by the spirit and scope of the invention as defined by the claims. Furthermore, unless otherwise stated or clearly contradictory in context, the present invention includes any of the above-described factors and all possible variations thereof.

Claims

1. A multi-stage Roots vacuum pump, characterized in that: include: A main body (10), wherein a rotor is arranged in the main body (10); A scavenging plate (20) disposed on one side of the main body (10); A motor (30) is arranged on the scavenging plate (20), and the motor (30) is drivingly connected to the rotor; A gear box (40) is arranged on the other side of the main body (10), and the gear box (40) is drivingly connected to the rotor; Wherein, an air inlet pipe (11) and an air outlet pipe (12) are arranged at the upper end of the main body (10), and the air inlet pipe (11) is connected to the gas passage in the main body (10).

2. A multi-stage Roots vacuum pump according to claim 1, characterized in that: The gas flow channel comprises a first flow channel (51), one side of the first flow channel (51) is connected to a second flow channel (52), the other side of the first flow channel (51) is connected to a third flow channel (53), the side of the third flow channel (53) facing away from the first flow channel (51) is connected to a fourth flow channel (54), a fifth flow channel (55) and a sixth flow channel (56) in sequence, and the first flow channel (51) is connected to an intake pipe (11).

3. A multi-stage Roots vacuum pump according to claim 2, characterized in that: An exhaust channel (61) is provided on the main body (10), the exhaust channel (61) is provided on the side of the gas flow channel, and the exhaust channel (61) is connected to the gas flow channel.

4. A multi-stage Roots vacuum pump according to claim 3, characterized in that: A silencer assembly (70) is arranged in the exhaust passage (61), and the silencer assembly (70) comprises a support frame (71) and a plurality of silencer pipes (72) arranged on the support frame (71).

5. A multi-stage Roots vacuum pump according to claim 1, characterized in that: A plurality of heat sinks (101) are provided on both upper and lower sides of the main body (10).

6. A multi-stage Roots vacuum pump according to claim 1, characterized in that: The scavenging plate (20) is provided with two axial holes (21), the axial holes (21) are used to set bearings, and the scavenging plate (20) is provided with a connected air inlet (22) and a scavenging channel, the scavenging channel is connected to the two axial holes (21), and the scavenging channel is used to discharge gas to the axial holes (21).

7. A multi-stage Roots vacuum pump according to claim 6, characterized in that: The scavenging passage comprises a first passage (231) and a second passage (232) which are arranged crosswise, and the first passage (231) and the second passage (232) respectively lead to two shaft holes (21).

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