CN217926300U

CN217926300U - Vacuum pump structure

Info

Publication number: CN217926300U
Application number: CN202221583867.0U
Authority: CN
Inventors: 周坤; 庄博; 马升; 康翔朝
Original assignee: Ningbo Baosi Energy Equipment Co Ltd
Current assignee: Ningbo Baosi Energy Equipment Co Ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-11-29
Anticipated expiration: 2032-06-23

Abstract

The utility model provides a vacuum pump structure, includes that casing and meshing rotor are vice, the front end of casing sets into the end cover, and the rear end sets up row end cover, the inside of casing is by preceding bearing housing, compression chamber and the rear bearing housing of being equipped with in proper order after to, meshing rotor is vice front end is rotated through first bearing assembly and is connected in the front bearing housing, and the rear end is rotated through second bearing assembly and is connected in the rear bearing housing, its characterized in that: the compression chamber is communicated with the front bearing chamber, the water lubrication structure is communicated with the compression chamber and/or the front bearing chamber, the oil lubrication structure is arranged on the rear bearing chamber, a first sealing assembly is arranged between the compression chamber and the rear bearing chamber and used for preventing oil in the rear bearing chamber from being sucked into the compression chamber and preventing water in the compression chamber from entering the rear bearing chamber, and the shell, the meshing rotor pair and the first bearing assembly are all made of antirust materials. The sealing structure of the vacuum pump structure is simplified.

Description

Vacuum pump structure

Technical Field

The utility model relates to a pump technical field, concretely relates to vacuum pump structure.

Background

The existing vacuum pump structure comprises a shell and a meshing rotor pair, wherein a front bearing chamber, a compression chamber and a rear bearing chamber are sequentially arranged in the shell from front to back, the front end of the meshing rotor pair is rotatably connected in the front bearing chamber through a first bearing assembly, and the rear end of the meshing rotor pair is rotatably connected in the rear bearing chamber through a second bearing assembly. At present, a water lubricating structure is generally arranged for a compression chamber to lubricate and cool, and an oil lubricating structure is arranged for a front bearing chamber and a rear bearing chamber to lubricate and cool.

However, the existing vacuum pump structure has the following technical problems: because the front bearing room and the rear bearing room of compression chamber and both sides all adopt different lubricating structure to need set up first seal assembly and second seal assembly between front bearing room and compression chamber and between rear bearing room and the compression chamber respectively, in order to prevent that lubricating oil in front bearing room and the rear bearing room from inhaling the compression chamber, and prevent that water in the compression chamber from entering into front bearing room and rear bearing room, seal structure is comparatively complicated.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: provided is a vacuum pump structure with a simplified sealing structure.

The technical solution of the utility model is that: the utility model provides a vacuum pump structure, includes that casing and meshing rotor are vice, the front end of casing sets into the end cover, and the rear end sets up row end cover, the inside of casing is by preceding bearing housing, compression chamber and the rear bearing housing of being equipped with in proper order after to, meshing rotor is vice front end is rotated through first bearing assembly and is connected in the front bearing housing, and the rear end is rotated through second bearing assembly and is connected in the rear bearing housing, its characterized in that: the compression chamber is communicated with the front bearing chamber, the water lubrication structure is communicated with the compression chamber and/or the front bearing chamber, the oil lubrication structure is arranged on the rear bearing chamber, a first sealing assembly is arranged between the compression chamber and the rear bearing chamber and used for preventing oil in the rear bearing chamber from being sucked into the compression chamber and preventing water in the compression chamber from entering the rear bearing chamber, and the shell, the meshing rotor pair and the first bearing assembly are all made of antirust materials.

After the structure is adopted, the utility model has the advantages of it is following:

the vacuum pump structure of the utility model is provided with the front bearing chamber and the compression chamber which adopt water lubrication cooling, and only the rear bearing chamber adopts oil lubrication cooling, thus only a sealing component is needed to be arranged between the compression chamber and the rear bearing chamber, and a sealing component is not needed to be arranged between the front bearing chamber and the compression chamber, thereby simplifying the sealing structure; the front bearing chamber is set to be consistent with the lubrication mode of the compression chamber, but not the rear bearing chamber, because parts in the front bearing chamber are fewer than parts in the rear bearing chamber, the reconstruction difficulty and the cost are lower; in addition, parts in the water lubrication chamber are made of antirust materials, so that the product performance is more reliable.

Preferably, the meshing rotor pair comprises a male rotor and a female rotor, the front ends of the male rotor and the female rotor are respectively provided with a first bearing assembly, the first bearing assembly comprises a thrust bearing, a rolling bearing and a bearing bush, the rolling bearing is coaxially arranged at the front end of the corresponding rotor, and the thrust bearing and the bearing bush are arranged on the rolling bearing in a front-back mode. This arrangement allows the first bearing assembly to better withstand axial and radial forces, thereby providing a more smooth and reliable operation of the intermeshing rotor pair.

Preferably, the thrust bearing and the rolling bearing are coated bearings or silicon carbide bearings. The coated bearing or the silicon carbide bearing is not only rust-proof, but also has small friction coefficient and low requirement on lubrication.

Preferably, the water lubrication structure includes a water inlet port provided on the housing and communicating with the compression chamber and/or the front bearing chamber. The water lubrication structure is simple and reliable.

Preferably, a second bearing assembly is mounted on each of the male and female rotors and located rearwardly of the first seal assembly, the second bearing assembly comprising a bearing housing, a cylindrical roller bearing mounted within the rear side of the bearing housing and coaxially mounted on the respective rotor, and a four-point angular contact bearing coaxially mounted on the respective rotor and located between the first seal assembly and the bearing housing. This arrangement allows the second bearing assembly to better withstand axial and radial forces, thereby providing a more stable and reliable meshing rotor pair.

Preferably, a first lock nut is further mounted on the rear side of the four-point angular contact bearing. This arrangement provides for secure mounting of the second bearing assembly on the meshing rotor pair.

Preferably, the male rotor and the female rotor are further provided with a male synchronizing gear and a female synchronizing gear which are meshed with each other and are located on the rear side of the second bearing assembly respectively, the electric vehicle further comprises a driving shaft arranged in the rear bearing chamber, one end of the driving shaft is connected with the male rotor/the female rotor, the other end of the driving shaft penetrates through the row end cover, and a second sealing assembly is arranged between the driving shaft and the row end cover. Utilize synchronous gear to guarantee the clearance of male rotor and female rotor, not only can avoid the friction that male rotor and female rotor direct contact brought, lubricated requirement is lower, and the cooling effect is preferred after the water lubrication.

Preferably, the second seal assembly includes a skeleton seal disposed inside the row end cap and an end cap seal disposed outside the row end cap. This setting makes and realizes inside and outside both sides double-seal between drive shaft and the row end cover, and sealed effect is better.

Preferably, a second lock nut is further installed at a rear side of the male and female synchronizing gears. This arrangement allows positive and negative synchronizing gears to be reliably mounted on the meshing rotor pair.

Description of the drawings:

FIG. 1 is a schematic structural view of the vacuum pump of the present invention;

in the figure: 1-inlet end cap, 2-thrust bearing, 3-bearing bush, 4-rolling bearing, 5-female rotor, 6-male rotor, 7-shell, 8-first sealing component, 9-cylindrical roller bearing, 10-bearing block, 11-four-point angular contact bearing, 12-compression chamber, 13-male synchronizing gear, 14-row end cap, 15-second sealing component, 16-first locking nut, 17-second locking nut, 18-framework seal, 19-end cap seal, 20-female synchronizing gear, 21-front bearing chamber, 22-rear bearing chamber, 23-driving shaft, 24-meshing rotor pair, 25-first bearing component, 26-second bearing component, and 27-water inlet hole channel.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Example (b):

a vacuum pump structure comprises a shell 7 and a meshing rotor pair 24, wherein the front end of the shell 7 is provided with an inlet end cover 1, the rear end of the shell 7 is provided with a discharge end cover 14, the interior of the shell 7 is sequentially provided with a front bearing chamber 21, a compression chamber 12 and a rear bearing chamber 22 from front to back, the front end of the meshing rotor pair 24 is rotatably connected in the front bearing chamber 21 through a first bearing assembly 25, the rear end of the shell is rotatably connected in the rear bearing chamber 22 through a second bearing assembly 26, the compression chamber 12 is communicated with the front bearing chamber 21, the vacuum pump structure further comprises a water lubrication structure communicated with the compression chamber 12 and/or the front bearing chamber 21, the rear bearing chamber 22 is provided with an oil lubrication structure, a first sealing assembly 8 is arranged between the compression chamber 12 and the rear bearing chamber 22 and used for preventing oil in the rear bearing chamber 22 from being sucked into the compression chamber 12 and preventing water in the compression chamber 12 from entering the rear bearing chamber 22, the shell 7, the meshing rotor pair 24 and the first bearing assembly 25 are all made of antirust materials, and the first sealing assembly 8, the water lubrication structure and the oil lubrication structure can be made of the existing bearing assembly by adopting the prior art.

The meshed rotor pair 24 comprises a male rotor 6 and a female rotor 5, a first bearing assembly 25 is arranged at the front end of each of the male rotor 6 and the female rotor 5, the first bearing assembly 25 comprises a thrust bearing 2, a rolling bearing 4 and a bearing bush 3, the rolling bearing 4 is coaxially arranged at the front end of the corresponding rotor, and the thrust bearing 2 and the bearing bush 3 are arranged on the rolling bearing 4 in a front-back mode; the thrust bearing 2 and the rolling bearing 4 are film-coated bearings or silicon carbide bearings.

The water lubricating structure comprises a water inlet pore passage 27 which is arranged on the shell 7 and is communicated with the compression chamber 12 and/or the front bearing chamber 21, in the embodiment, the water inlet pore passage 27 is communicated with the compression chamber 12, water injected from the water inlet pore passage 27 flows into the compression chamber 12 and the front bearing chamber 21, and after the parts in the compression chamber 12 and the front bearing chamber 21 are lubricated and cooled, the water is discharged together with compressed gas from an air outlet of the compression chamber 12.

A second bearing assembly 26 is arranged on the male rotor 6 and the female rotor 5 and positioned at the rear side of the first sealing assembly 8, the second bearing assembly 26 comprises a bearing seat 10, a cylindrical roller bearing 9 and a four-point angular contact bearing 11, the four-point angular contact bearing 11 is arranged in the bearing seat 10 and is coaxially arranged on the corresponding rotor, and the cylindrical roller bearing 9 is coaxially arranged on the corresponding rotor and positioned between the first sealing assembly 8 and the bearing seat 10; a first locking nut 16 is also mounted on the rear side of the four-point angular contact bearing 11.

The male rotor 6 and the female rotor 5 are respectively provided with a male synchronizing gear 13 and a female synchronizing gear 20 which are meshed with each other and are positioned at the rear side of a second bearing assembly 26, the device further comprises a driving shaft 23 arranged in a rear bearing chamber 22, one end of the driving shaft 23 is connected with the male rotor 6/the female rotor 5, the other end of the driving shaft 23 penetrates through the row end cover 14, in the embodiment, the driving shaft 23 is connected with the female rotor 5, and a second sealing assembly 15 is arranged between the driving shaft 23 and the row end cover 14; the second sealing assembly 15 comprises a framework seal 18 arranged on the inner side of the row end cover 14 and an end cover seal 19 arranged on the outer side of the row end cover 14, and the framework seal 18 and the end cover seal 19 can be obtained by adopting the prior art; the rear sides of the male and female synchronizing

gears

13 and 20 are also mounted with a second lock nut 17.

Claims

1. The utility model provides a vacuum pump structure, includes casing (7) and meshing rotor pair (24), the front end of casing (7) sets up into end cover (1), and the rear end sets up row end cover (14), the inside of casing (7) is by preceding to being equipped with preceding bearing chamber (21), compression chamber (12) and back bearing chamber (22) in proper order after to, the front end of meshing rotor pair (24) rotates through first bearing assembly (25) and connects in preceding bearing chamber (21), and the rear end rotates through second bearing assembly (26) and connects in back bearing chamber (22), its characterized in that: the compression chamber (12) is communicated with the front bearing chamber (21), the hydraulic lubricating structure communicated with the compression chamber (12) and/or the front bearing chamber (21) is further included, the rear bearing chamber (22) is provided with an oil lubricating structure, a first sealing assembly (8) is arranged between the compression chamber (12) and the rear bearing chamber (22) and used for preventing oil in the rear bearing chamber (22) from being sucked into the compression chamber (12) and preventing water in the compression chamber (12) from entering the rear bearing chamber (22), and the shell (7), the meshing rotor pair (24) and the first bearing assembly (25) are all made of antirust materials.

2. A vacuum pump structure as claimed in claim 1, wherein: the meshed rotor pair (24) comprises a male rotor (6) and a female rotor (5), first bearing assemblies (25) are mounted at the front ends of the male rotor (6) and the female rotor (5), each first bearing assembly (25) comprises a thrust bearing (2), a rolling bearing (4) and a bearing bush (3), the rolling bearings (4) are coaxially mounted at the front ends of the corresponding rotors, and the thrust bearings (2) and the bearing bushes (3) are mounted on the rolling bearings (4) in a front-back mode.

3. A vacuum pump structure according to claim 2, wherein: the thrust bearing (2) and the rolling bearing (4) are film-coated bearings or silicon carbide bearings.

4. A vacuum pump structure as claimed in claim 1, wherein: the water lubricating structure comprises a water inlet pore passage (27) which is arranged on the shell (7) and communicated with the compression chamber (12) and/or the front bearing chamber (21).

5. A vacuum pump structure as claimed in claim 2, wherein: and second bearing assemblies (26) are respectively arranged on the male rotor (6) and the female rotor (5) and positioned at the rear sides of the first sealing assemblies (8), each second bearing assembly (26) comprises a bearing seat (10), a cylindrical roller bearing (9) and a four-point angular contact bearing (11), each four-point angular contact bearing (11) is arranged in the rear side of each bearing seat (10) and is coaxially arranged on the corresponding rotor, and each cylindrical roller bearing (9) is coaxially arranged on the corresponding rotor and positioned between each first sealing assembly (8) and each bearing seat (10).

6. A vacuum pump structure according to claim 5, wherein: and a first lock nut (16) is also arranged at the rear side of the four-point angular contact bearing (11).

7. A vacuum pump structure according to claim 2, wherein: the double-seal-ring-type oil pumping unit is characterized in that a male synchronous gear (13) and a female synchronous gear (20) which are meshed with each other are further respectively arranged on the male rotor (6) and the female rotor (5) and located on the rear side of a second bearing assembly (26), the double-seal-ring-type oil pumping unit further comprises a driving shaft (23) arranged in a rear bearing chamber (22), one end of the driving shaft (23) is connected with the male rotor (6)/the female rotor (5), the other end of the driving shaft penetrates through a row end cover (14), and a second seal assembly (15) is arranged between the driving shaft (23) and the row end cover (14).

8. A vacuum pump structure according to claim 7, wherein: the second seal assembly (15) includes a skeleton seal (18) disposed inside the row end cap (14) and an end cap seal (19) disposed outside the row end cap (14).

9. A vacuum pump structure according to claim 7, wherein: and a second locking nut (17) is also arranged at the rear sides of the male synchronizing gear (13) and the female synchronizing gear (20).