CN215805027U

CN215805027U - Vacuum pump sealing structure

Info

Publication number: CN215805027U
Application number: CN202122452612.2U
Authority: CN
Inventors: 马基刚
Original assignee: Shandong Zeyi Vacuum Equipment Co ltd
Current assignee: Shandong Zeyi Vacuum Equipment Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-02-11
Anticipated expiration: 2031-10-12

Abstract

The utility model relates to the technical field of vacuum pump sealing, and particularly discloses a vacuum pump sealing structure which comprises a driving shaft, a driven shaft, a sealing seat, an oil tank and two groups of sealing components, wherein the driving shaft is connected with the driven shaft through the sealing seat; the upper end of the oil tank is provided with a sealing seat in a matching way; the driving shaft and the driven shaft are respectively and rotatably arranged on the sealing seat through the sealing assembly, the sealing seat comprises a main body, and an accommodating groove is formed in the bottom surface of the main body in a manner of being matched with the sealing assembly; a nitrogen hole is formed in the side face of the main body; the nitrogen hole is communicated with the accommodating groove; the top surface of the main body is provided with a cooling groove in cooperation with the accommodating groove; and a water inlet is formed in the side wall of the main body in a matching manner with the cooling tank. Compared with the prior art, the sealing effect of the sealing assembly arranged in the accommodating groove is ensured and the service life is prolonged by arranging the nitrogen hole and the cooling groove; through the reasonable arrangement of the sealing component, the disassembly and the assembly are convenient on the premise of ensuring the sealing effect.

Description

Vacuum pump sealing structure

Technical Field

The utility model relates to the technical field of vacuum pump sealing, and particularly discloses a vacuum pump sealing structure.

Background

The existing vacuum pump is generally provided with a driving shaft and a driven shaft in a pump body, the lower end of the pump body is provided with a sealing seat, the lower end of the sealing seat is provided with an oil tank, a transmission gear between the driving shaft and the driven shaft is arranged in the oil tank, and the driving shaft and the driven shaft are rotatably arranged on the sealing seat through a framework oil seal or a mechanical seal and the like by utilizing a bearing.

The above arrangement has the following problems:

1. the sealing elements are frequently replaced, and need to be disassembled and reassembled one by one during replacement, so that the operation is complicated;

2. the rotation of driving shaft and driven shaft easily causes the temperature rise of bearing and sealing member, and current seal receptacle lacks the cooling setting again, leads to bearing and sealing member life shorter.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a vacuum pump sealing structure to solve the problems that in the prior art, a sealing element is frequently replaced, the assembly and disassembly are complicated, and the service life of a bearing is short.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a vacuum pump sealing structure comprises a driving shaft, a driven shaft, a sealing seat, an oil tank and two groups of sealing components; the upper end of the oil tank is provided with a sealing seat in a matching way; the driving shaft and the driven shaft are respectively and rotatably arranged on the sealing seat through the sealing assembly, the sealing seat comprises a main body, and an accommodating groove is formed in the bottom surface of the main body in a manner of being matched with the sealing assembly; a nitrogen hole is formed in the side face of the main body; the nitrogen hole is communicated with the accommodating groove; the top surface of the main body is provided with a cooling groove in cooperation with the accommodating groove; and a water inlet is formed in the side wall of the main body in a matching manner with the cooling tank. The setting of nitrogen gas hole intercommunication storage tank when the suction has the gas of corrosivity, can reduce the corruption to the seal assembly who sets up in the storage tank, improves sealed effect. The setting of cooling bath can cool off the seal assembly in the storage tank, avoids the short phenomenon of life of sealing member or bearing that the high temperature caused.

Preferably, the top surface of the main body is provided with a plurality of reinforcing ribs in a matching manner with the cooling groove, so that the structural strength of the main body of the sealing seat is ensured.

Preferably, a compressed air groove is further arranged on the top surface of the main body; a compressed air outlet is formed in the side wall of the main body; the compressed air outlet is communicated with the compressed air groove, compressed gas enters the compressed air groove and is discharged from the compressed air outlet, the practicability of the sealing seat is further improved, the one end of the compressed air outlet, which is arranged in the axial direction of the driving shaft or the driven shaft, is ensured, and the compression efficiency is favorably ensured.

Preferably, the sealing assembly comprises a sealing gland, a bearing seat, a bearing gland, a framework oil seal and a bearing; the bearing is arranged in the bearing seat, and one end of the bearing is sealed by a bearing gland; the other end of the bearing is provided with a plurality of framework oil seals; the framework oil seal is arranged in the bearing seat; the upper end of the bearing seat is provided with a sealing gland in a matching way; the bearing seat is arranged on the sealing seat through a bolt. The framework oil seal and the bearing are arranged in the bearing seat together, so that the assembly and disassembly are convenient, and the sealing gland and the bearing gland which are respectively arranged at the two ends of the bearing seat are matched, so that the integral sealing performance in the bearing seat is ensured. And the sealing assembly is arranged in the accommodating groove and is matched with the input of nitrogen, so that the sealing effect of the framework oil seal is ensured, and the service life is prolonged.

Preferably, the upper end of the sealing gland is provided with a shaft sleeve in cooperation with the driving shaft or the driven shaft, so that the sealing effect between the driving shaft or the driven shaft and the sealing seat is further ensured.

Preferably, the framework oil seal is sleeved outside the oil seal sleeve; the oil seal sleeve is sleeved on the driving shaft or the driven shaft, and the sealing effect between the framework oil seal and the driving shaft or the driven shaft is enhanced.

The utility model has the beneficial effects that: through the arrangement of the nitrogen hole and the cooling tank, the sealing effect of the sealing assembly arranged in the accommodating tank is ensured, and the service life is prolonged; through the reasonable arrangement of the sealing component, the disassembly and the assembly are convenient on the premise of ensuring the sealing effect.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a seal seat according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the structure of FIG. 2 from different viewing angles;

FIG. 4 is a schematic view of the partially cut-away structure of FIG. 2;

FIG. 5 is a schematic cross-sectional view of an embodiment of the present invention at the drive shaft;

FIG. 6 is a schematic view of a cutaway configuration of the housing and pump chamber housing portions in use according to an embodiment of the present invention;

description of reference numerals:

1-driving shaft, 2-driven shaft, 3-sealing seat, 4-oil tank, 5-sealing gland, 6-bearing seat, 7-bearing gland, 8-skeleton oil seal, 9-bearing, 10-shaft sleeve, 11-oil seal sleeve, 12-shell and 13-pump cavity shell;

301-main body, 302-containing tank, 303-nitrogen hole, 304-cooling tank, 305-water inlet, 306-reinforcing rib, 307-compressed air tank, 308-compressed air outlet.

Detailed Description

The present invention is further described below with reference to examples.

Example 1

As shown in fig. 1, a sealing structure of a vacuum pump comprises a driving shaft 1, a driven shaft 2, a sealing seat 3, an oil tank 4 and two groups of sealing components; the upper end of the oil tank 4 is provided with a sealing seat 3 in a matching way; the driving shaft 1 and the driven shaft 2 are respectively arranged on the sealing seat 3 in a rotating way through a sealing assembly. The transmission mechanism between the driving shaft 1 and the driven shaft 2 is arranged in the oil tank 4.

As shown in fig. 2 to 4, the sealing seat 3 includes a main body 301, and a containing groove 302 is disposed on a bottom surface of the main body 301 and is matched with the sealing assembly; a nitrogen hole 303 is arranged on the side surface of the main body 301; the nitrogen hole is communicated with the containing groove 302; a cooling groove 304 is arranged on the top surface of the main body 301 in cooperation with the accommodating groove 302; the side wall of the main body 301 is provided with a water inlet 305 in cooperation with the cooling tank 304. The nitrogen gas hole 303 communicates with the accommodating groove 302, so that when corrosive gas is sucked, corrosion of the sealing assembly arranged in the accommodating groove 302 can be reduced, and the sealing effect is improved. The arrangement of the cooling groove 304 can cool the sealing assembly in the accommodating groove 302, thereby avoiding the phenomenon of short service life of the sealing element or the bearing caused by high temperature. The top surface of the main body 301 is provided with a plurality of reinforcing ribs 306 in cooperation with the cooling groove 304, so that the structural strength of the main body of the seal holder 3 is ensured. The top surface of the main body 301 is also provided with a compressed air groove 307; a compressed air outlet 308 is arranged on the side wall of the main body 301; the compressed air outlet 308 communicates with the compressed air tank 307. Compressed gas enters the compressed air groove 307 and is discharged from the compressed air outlet 308, so that the practicability of the seal seat 3 is further improved, the one end of the compressed air outlet 308 arranged in the axial direction of the driving shaft 1 or the driven shaft 2 is ensured, and the compression efficiency is favorably ensured.

As shown in fig. 5, the seal assembly includes a seal gland 5, a bearing seat 6, a bearing gland 7, a skeleton oil seal 8 and a bearing 9; the bearing 9 is arranged in the bearing seat 6, and one end of the bearing is sealed by a bearing gland 7; the other end of the bearing 9 is provided with three framework oil seals 8; the framework oil seal 8 is arranged in the bearing seat 6; the upper end of the bearing seat 6 is provided with a sealing gland 5 in a matching way; the bearing seat 6 is arranged on the sealing seat 3 through bolts. The framework oil seal 8 and the bearing 9 are arranged in the bearing seat 3 together, so that the assembly and disassembly are convenient, and the sealing gland 5 and the bearing gland 7 which are respectively arranged at two ends of the bearing seat 3 are matched, so that the whole sealing performance in the bearing seat 3 is ensured. And the sealing component is arranged in the containing groove 302 and is matched with the input of nitrogen, so that the sealing effect of the framework oil seal 8 is ensured, and the service life is prolonged. The upper end of the sealing gland 5 is provided with a shaft sleeve 10 in cooperation with the driving shaft 1 or the driven shaft 2, so that the sealing effect between the driving shaft 1 or the driven shaft 2 and the sealing seat 3 is further ensured. The framework oil seal 8 is sleeved outside the oil seal sleeve 11; the oil seal sleeve 11 is sleeved on the driving shaft 1 or the driven shaft 2 to enhance the sealing effect between the framework oil seal 8 and the driving shaft 1 or the driven shaft 2.

When in use, as shown in fig. 6, the sealing seat 3 is respectively provided with a shell 12 and a pump cavity shell 13; the pump cavity shell 13 is sleeved in the shell 12; the driving shaft 1 and the driven shaft 2 are arranged in the pump cavity shell 13 and are respectively connected with a claw-shaped rotor (not shown in the figure); the compressed air groove 307 is arranged in the pump cavity shell 13, so that the compressed air of the claw-shaped rotor can be conveniently led out; the water in the cooling channel 304 enters between the casing 12 and the pump chamber housing 13, and a water outlet (not shown) is provided in the casing 12 to facilitate the water discharge.

Claims

1. A vacuum pump sealing structure comprises a driving shaft (1), a driven shaft (2), a sealing seat (3), an oil tank (4) and two groups of sealing components; the upper end of the oil tank (4) is provided with a sealing seat (3) in a matching way; the driving shaft (1) and the driven shaft (2) are respectively and rotatably arranged on the sealing seat (3) through sealing components, and the sealing seat (3) is characterized by comprising a main body (301), and a containing groove (302) is formed in the bottom surface of the main body (301) in a manner of being matched with the sealing components; a nitrogen hole (303) is formed in the side surface of the main body (301); the nitrogen hole is communicated with the accommodating groove (302); a cooling groove (304) is arranged on the top surface of the main body (301) in a way of being matched with the containing groove (302); the side wall of the main body (301) is provided with a water inlet (305) matched with the cooling groove (304).

2. The vacuum pump sealing structure according to claim 1, wherein a plurality of reinforcing ribs (306) are provided on a top surface of the main body (301) in cooperation with the cooling groove (304).

3. The vacuum pump sealing structure according to claim 2, wherein a compressed air groove (307) is further provided on a top surface of the main body (301); a compressed air outlet (308) is formed in the side wall of the main body (301); the compressed air outlet (308) is communicated with a compressed air groove (307).

4. A vacuum pump sealing structure according to claim 1 or 3, wherein the sealing assembly comprises a gland (5), a bearing seat (6), a bearing gland (7), a skeleton oil seal (8) and a bearing (9); the bearing (9) is arranged in the bearing seat (6), and one end of the bearing is sealed by a bearing gland (7); the other end of the bearing (9) is provided with a plurality of framework oil seals (8); the framework oil seal (8) is arranged in the bearing seat (6); the upper end of the bearing seat (6) is provided with a sealing gland (5) in a matching way; the bearing seat (6) is arranged on the sealing seat (3) through a bolt.

5. The vacuum pump sealing structure according to claim 4, wherein a boss (10) is provided at an upper end of the gland (5) in cooperation with the driving shaft (1) or the driven shaft (2).

6. The vacuum pump sealing structure according to claim 4, wherein the framework oil seal (8) is sleeved outside the oil seal sleeve (11); the oil seal sleeve (11) is sleeved on the driving shaft (1) or the driven shaft (2).