CN215170754U

CN215170754U - Multistage air-cooled roots vacuum pump

Info

Publication number: CN215170754U
Application number: CN202121271984.9U
Authority: CN
Inventors: 李聪; 吕冬梅; 黄福文; 胡金磊; 王以翠; 李成宇
Original assignee: Shandong Zibo Dexiri Pump Co ltd
Current assignee: Shandong Zibo Dexiri Pump Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-12-14
Anticipated expiration: 2031-06-08

Abstract

The utility model relates to a multistage air-cooled Roots vacuum pump, including base, pump body and motor, pass through the coupling joint between the motor and the pump body, the periphery of shaft coupling is equipped with the fixed plate, the fixed plate is "U" type structure, the bottom of "U" type structure is equipped with the connecting plate, be equipped with the through-hole on the connecting plate for fix the connecting plate on the base, thereby fixed shaft coupling; the bottom of the pump body and the bottom of the motor are both provided with fixed blocks, the fixed blocks are welded on the base, the bottom of the pump body is provided with an exhaust pipeline, and the bottom of the exhaust pipeline is connected with a cooler for cooling discharged gas; the base is equipped with roof and bottom plate, be equipped with a plurality of support columns between roof and the bottom plate, the bottom plate welding has the connecting block, the both sides of connecting block are the triangle-shaped board, the bottom of connecting block is the rectangular plate, be equipped with the through-hole on the rectangular plate for unable adjustment base.

Description

Multistage air-cooled roots vacuum pump

Technical Field

The utility model relates to a vacuum pump technical field, concretely relates to multistage air cooling roots vacuum pump.

Background

At present, more and more dry vacuum obtaining apparatuses are developed and widely used in order to meet the demand for oil-free, clean vacuum in manufacturing processes typified by semiconductors, electronics industry, chemical industry, and the like. The multistage Roots pump is characterized in that the multistage Roots pump is arranged in series on a rotor shaft, namely, multistage Roots rotors are connected in series on the rotor shaft, the rotors in each stage are separated by intermediate walls to form relatively independent pump chambers, and the pump chambers in each stage are connected through a gas flow passage between a gas inlet of the previous stage and a gas outlet of the next stage. The rotors of each stage are of the same diameter and shape, and sometimes of different widths, narrowing toward the high pressure side. The pumped gas enters the pump cavity from the gas inlet of the first stage, enters the next stage of pump cavity through the gas flow channel after being compressed by one stage, continues to be compressed, and is discharged from the last stage of exhaust day after being compressed step by step.

The multistage roots pump realizes the effect that a plurality of roots pumps are connected in series through the series connection of multistage rotors, so the multistage roots pump can not possess the pumping speed that is bigger than single-stage roots pump, and its theoretical pumping speed is the theoretical pumping speed that depends on the first order. But the structure can enable the roots vacuum pump to achieve high compression ratio. Therefore, the multi-stage roots pump can be used as a main pump to directly discharge to the atmosphere without being provided with a backing pump, so that oil gas pollution to the system caused by the backing pump can be avoided. The Roots pump of 3-6 grades can be pumped to the limit pressure of 1Pa from the atmospheric pressure, and the rotor is overheated and expanded due to the high pressure difference, so that the phenomenon of blocking is generated.

Therefore, a multistage air-cooled roots vacuum pump is required.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a for solving the problem among the prior art and proposing, its aim at provides a multistage air-cooled roots vacuum pump, has solved the dead problem of rotor card.

A multi-stage air-cooling Roots vacuum pump comprises a base, a pump body and a motor, wherein the motor is connected with the pump body through a coupler, a fixing plate is arranged on the periphery of the coupler, the fixing plate is of a U-shaped structure, a connecting plate is arranged at the bottom of the U-shaped structure, and a through hole is formed in the connecting plate and used for fixing the connecting plate on the base so as to fix the coupler; the bottom of the pump body and the bottom of the motor are both provided with fixed blocks, the fixed blocks are welded on the base, the bottom of the pump body is provided with an exhaust pipeline, and the bottom of the exhaust pipeline is connected with a cooler for cooling discharged gas; the base is equipped with roof and bottom plate, be equipped with a plurality of support columns between roof and the bottom plate, the bottom plate welding has the connecting block, the both sides of connecting block are the triangle-shaped board, the bottom of connecting block is the rectangular plate, be equipped with the through-hole on the rectangular plate for unable adjustment base.

Preferably, the pump body is provided with a guard plate, the top and the bottom of the guard plate are both provided with connecting holes, an L-shaped handle is arranged in the connecting holes, and the L-shaped handle is fixed in the connecting holes through bolts.

Preferably, the pump body is of a labyrinth structure.

Preferably, a rotating shaft and a rotor arranged on the rotating shaft are arranged in the pump body, an air inlet is formed in the top of the pump body, and an air inlet is formed in the side face in the pump body.

The utility model discloses a multistage gas cooling roots vacuum pump, the temperature through the control rotor is no longer than its allowed range, utilizes cooling gas to cool off the rotor. Meanwhile, in order to prevent the lubricating oil of the bearing and the gear from flowing back to the pump cavity, the pump cavity and the gear box of the multi-stage roots pump are separated or sealed by a labyrinth structure, and the oil-free degree is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of the present invention.

In the figure: 1-base, 11-top plate, 12-bottom plate, 13-connecting block, 14-supporting column; 2-pump body, 21-guard plate, 22-L-shaped handle, 23-air inlet; 3-an electric motor; 4, fixing a plate; 5-connecting plates; 6, fixing blocks; 7-an exhaust duct; 8-a cooler.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses an embodiment, refer to fig. 1-2, a multistage air-cooled roots vacuum pump, including base 1, the pump body 2 and motor 3, through the coupling joint between motor 3 and the pump body 2, the periphery of shaft coupling is equipped with fixed plate 4, and fixed plate 4 is "U" type structure, and the bottom of "U" type structure is equipped with connecting plate 5, is equipped with the through-hole on the connecting plate 5 for be fixed in on the base 1 with connecting plate 5, thereby fixed shaft coupling.

The bottom of the pump body 2 and the bottom of the motor 3 are both provided with a fixed block 6, the fixed blocks 6 are welded on the base 1, the bottom of the pump body 2 is provided with an exhaust pipeline 7, and the bottom of the exhaust pipeline 7 is connected with a cooler 8 for cooling discharged gas; the pump body 1 is provided with a guard plate 21, the top and the bottom of the guard plate 21 are both provided with connecting holes, an L-shaped handle 22 is arranged in each connecting hole, and the L-shaped handle 22 is fixed in each connecting hole through a bolt; the pump body 2 adopts a labyrinth structure; a rotating shaft and a rotor arranged on the rotating shaft are arranged in the pump body 2, an air inlet 23 is formed in the top in the pump body 2, and an air inlet is formed in the side surface in the pump body 2; an oil tank is arranged on one side in the pump body 2, and gears are sleeved on one end of the rotating shaft inserted in the oil tank.

Base 1 is equipped with roof 11 and bottom plate 12, is equipped with a plurality of support columns 14 between roof 11 and the bottom plate 12, and 1 welding of bottom plate has connecting block 13, and the both sides of connecting block 13 are the triangle-shaped board, and the bottom of connecting block 13 is the rectangular plate, is equipped with the through-hole on the rectangular plate for unable adjustment base 1.

Wherein, the rotor includes driving rotor and driven rotor.

The utility model discloses a use method: the motor 3 transmits power to the rotating shaft through the coupler and then drives the driving rotor in the pump body 2, the driving rotor drives the driven rotor through the gear in the oil tank, the two rotors rotate in the pump body 2 in the same speed and opposite directions to respectively realize the functions of air suction and air exhaust, and the rotors adopt a three-blade structure, so that the three-time air suction and air exhaust can be realized when each rotor rotates for one circle; the intake and exhaust compression ratio of the Roots vacuum pump reaches l: 10, the compressed gas can generate great temperature rise, and because the air inlet 23 of the pump body 1 has certain vacuum degree, when the rotor cavity is communicated with the air inlet on the side surface of the pump body, normal-pressure and normal-temperature air is sucked into the pump cavity under the action of pressure difference to cool heating parts in the pump body; and simultaneously, the discharged gas is cooled by a cooler and then discharged for recycling.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multi-stage air-cooled Roots vacuum pump is characterized by comprising a base, a pump body and a motor, wherein the motor is connected with the pump body through a coupler, a fixing plate is arranged on the periphery of the coupler and is of a U-shaped structure, a connecting plate is arranged at the bottom of the U-shaped structure, and a through hole is formed in the connecting plate and used for fixing the connecting plate on the base so as to fix the coupler; the bottom of the pump body and the bottom of the motor are both provided with fixed blocks, the fixed blocks are welded on the base, the bottom of the pump body is provided with an exhaust pipeline, and the bottom of the exhaust pipeline is connected with a cooler for cooling discharged gas; the base is equipped with roof and bottom plate, be equipped with a plurality of support columns between roof and the bottom plate, the bottom plate welding has the connecting block, the both sides of connecting block are the triangle-shaped board, the bottom of connecting block is the rectangular plate, be equipped with the through-hole on the rectangular plate for unable adjustment base.

2. The multi-stage air-cooled Roots vacuum pump as claimed in claim 1, wherein the pump body is provided with a guard plate, the guard plate is provided with connecting holes at the top and the bottom, and an L-shaped handle is mounted in the connecting holes and fixed in the connecting holes through bolts.

3. The multi-stage gas-cooled roots vacuum pump as claimed in claim 2, wherein the pump body is of a labyrinth structure.

4. The multi-stage air-cooled roots vacuum pump as claimed in claim 1, wherein the pump body is provided with a rotating shaft and a rotor mounted on the rotating shaft, the top of the pump body is provided with an air inlet, and the side of the pump body is provided with an air inlet.