CN213063954U

CN213063954U - Roots vacuum pump with 5 mechanical seal structures

Info

Publication number: CN213063954U
Application number: CN201922173793.8U
Authority: CN
Inventors: 王佳元; 浦卫峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2021-04-27
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses a roots vacuum pump with 5 mechanical seal structure, including roots vacuum pump body, roots vacuum pump body's tip is provided with the grease chamber, be provided with the end cover between roots vacuum pump body and the grease chamber, be provided with the rotor shaft between the end cover, the end connection of rotor shaft has the drive shaft, the outer wall of rotor shaft tip passes through bearing and end cover interconnect, the both ends of rotor shaft are provided with first, two, three, four mechanical seal respectively, the outer wall of drive shaft tip is fixed with the gear, the other end of drive shaft is provided with fifth mechanical seal, the motor is installed to roots vacuum pump body's tip, the tip of motor has the output shaft through the coupling joint.

Description

Roots vacuum pump with 5 mechanical seal structures

Technical Field

The utility model belongs to the technical field of the roots vacuum pump, concretely relates to roots vacuum pump with 5 mechanical seal structure.

Background

The Roots vacuum pump (Roots pump for short) is a variable displacement vacuum pump in which two blade-shaped rotors rotating synchronously in opposite directions are installed in the pump, and small gaps are formed among the rotors and between the rotors and the inner wall of a pump shell so as not to contact each other. The Roots vacuum pump is tested for long-term operation on devices such as petroleum, chemical engineering, plastics, pesticides, dynamic balance of a steam turbine rotor, aerospace space simulation and the like, and therefore, the Roots vacuum pump is expected to be widely popularized and applied in China. And can be widely used in petroleum, chemical, metallurgy, textile and other industries.

However, the conventional roots vacuum pump is sealed by a piston ring, and cannot be well suitable for severe working conditions such as chemical pharmacy, and the like, so that the roots vacuum pump with 5 mechanical sealing structures is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a roots vacuum pump with 5 mechanical seal structure to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a Roots vacuum pump with 5 mechanical sealing structures comprises a Roots vacuum pump body, an oil chamber is arranged at the end part of the Roots vacuum pump body, an end cover is arranged between the Roots vacuum pump body and the oil chamber, a rotor shaft is arranged between the end covers, a driving shaft is connected with the end part of the rotor shaft, the outer wall of the end part of the rotor shaft is mutually connected with the end covers through bearings, a first mechanical sealing element and a second mechanical sealing element are respectively arranged at two ends of the rotor shaft, another rotor shaft is arranged at one side of the rotor shaft, a third mechanical sealing element and a fourth mechanical sealing element are respectively arranged at two ends of the other rotor shaft, the rotor body is fixed on the outer wall of the rotor shaft, a pump cavity is arranged in the middle part of the Roots vacuum pump body, a fifth mechanical sealing element is arranged on the outer wall of the, the other end of the driving shaft is connected with the output shaft through a coupler, the motor is installed at the end of the Roots vacuum pump body, and the end of the motor is connected with the output shaft.

Preferably, two rotor shafts are provided, which are designed parallel to one another.

Preferably, the bearings are arranged symmetrically with respect to the central axis of the rotor shaft, and the number of the bearings is four.

Preferably, the first mechanical seal and the second mechanical seal are symmetrically arranged about the rotor shaft, and the first mechanical seal and the second mechanical seal are nested with the rotor shaft.

Preferably, the third and fourth mechanical seals are arranged symmetrically with respect to the further rotor shaft, the third and fourth mechanical seals being of a nested design with the further rotor shaft.

Compared with the prior art, the beneficial effects of the utility model are that:

1. be provided with first mechanical seal, second mechanical seal, third mechanical seal, five mechanical seal of fourth mechanical seal and fifth mechanical seal, original piston ring seal and oil blanket have been replaced and sealed, make pump chamber and grease chamber sealed isolation completely, the grease chamber just can not infringed by the flow medium in the pump chamber like this, and then the lubricity of destroying lubricating oil has been avoided, can avoid the fault condition because the medium invades the grease chamber and causes completely, can be more suitable for being used for abominable operating mode conditions such as chemical industry pharmacy, and drive epaxial fifth mechanical seal has good sealing performance, can effectively prevent the outside seepage of lubricating oil, outside atmosphere is inside to leak, than other oil blanket sealing methods, it is sealed more reliable and stable, service life is longer.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the internal structure of the Roots vacuum pump body in FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the installation structure of the driving shaft of FIG. 2 according to the present invention;

in the figure: 1. a Roots vacuum pump body; 2. an oil chamber; 3. an end cap; 4. a rotor shaft; 5. a drive shaft; 6. a bearing; 7. a first mechanical seal; 8. a second mechanical seal; 9. a third mechanical seal; 10. a fourth mechanical seal; 11. a rotor body; 12. a pump chamber; 13. a gear; 14. a fifth mechanical seal; 15. a motor; 16. an output shaft; 17. a coupling is provided.

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.

Referring to fig. 1-3, the present invention provides a technical solution: a Roots vacuum pump with 5 mechanical sealing structures comprises a Roots vacuum pump body 1, an oil chamber 2 is arranged at the end part of the Roots vacuum pump body 1, an end cover 3 is arranged between the Roots vacuum pump body 1 and the oil chamber 2, a rotor shaft 4 is arranged between the end covers 3, a driving shaft 5 is connected with the end part of the rotor shaft 4, the outer wall of the end part of the rotor shaft 4 is mutually connected with the end cover 3 through a bearing 6, a first mechanical sealing part 7 and a second mechanical sealing part 8 are respectively arranged at two ends of the rotor shaft 4, another rotor shaft 4 is arranged at one side of the rotor shaft 4, a third mechanical sealing part 9 and a fourth mechanical sealing part 10 are respectively arranged at two ends of the other rotor shaft 4, a rotor body 11 is fixed on the outer wall of the rotor shaft 4, a pump cavity 12 is arranged in the middle part of the Roots vacuum pump body 1, a fifth mechanical, the other end of the driving shaft 5 is connected with an output shaft 16 through a coupling 17, a motor 15 is installed at the end of the Roots vacuum pump body 1, and the output shaft 16 is connected with the end of the motor 15.

The rotor shaft 4 is provided with two, and rotor shaft 4 parallel design each other has increased roots vacuum pump body 1's power.

The bearings 6 are symmetrically arranged about the central axis of the rotor shaft 4, and the number of the bearings 6 is four, so that the friction force of the rotor shaft 4 in rotation is reduced.

The first mechanical seal 7 and the second mechanical seal 8 are symmetrically arranged about the rotor shaft 4, and the first mechanical seal 7 and the second mechanical seal 8 are nested with the rotor shaft 4, so that the sealing performance of the two ends of the active rotor shaft 4 is improved.

The third mechanical seal 9 and the fourth mechanical seal 10 are symmetrically arranged about the other rotor shaft 4, and the third mechanical seal 9 and the fourth mechanical seal 10 are designed to be nested with the other rotor shaft 4, so that the sealing performance of the two ends of the driven rotor shaft 4 is improved.

The side of the gear 13 is designed to be inclined, two gears 13 are arranged, the gears 13 are in meshed connection, and the gears 13 are designed to be precise molds, so that low noise and reliable operation are ensured.

The first mechanical seal 7, the second mechanical seal 8, the third mechanical seal 9, the fourth mechanical seal 10 and the fifth mechanical seal 14 are of type 108/BIA.

The utility model discloses a theory of operation and use flow: the device is when using, at first be provided with five mechanical seal of first mechanical seal 7, second mechanical seal 8, third mechanical seal 9, five mechanical seal of fourth mechanical seal 10 and fifth mechanical seal 14, original piston ring seal and oil blanket seal have been replaced, make pump chamber 12 and grease chamber 2 sealed isolation completely, grease chamber 2 just can not infringed by the flow medium in pump chamber 12 like this, and then avoided destroying the lubricity of lubricating oil, can avoid completely because the fault condition that the medium invades grease chamber 2 and cause, can be more suitable for being used for abominable operating mode conditions such as chemical industry pharmacy.

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. The utility model provides a roots vacuum pump with 5 mechanical seal structure, includes roots vacuum pump body (1), its characterized in that: an oil chamber (2) is arranged at the end part of the Roots vacuum pump body (1), an end cover (3) is arranged between the Roots vacuum pump body (1) and the oil chamber (2), a rotor shaft (4) is arranged between the end covers (3), a driving shaft (5) is connected at the end part of the rotor shaft (4), the outer wall of the end part of the rotor shaft (4) is connected with the end cover (3) through a bearing (6), a first mechanical sealing element (7) and a second mechanical sealing element (8) are respectively arranged at two ends of the rotor shaft (4), another rotor shaft (4) is arranged at one side of the rotor shaft (4), a third mechanical sealing element (9) and a fourth mechanical sealing element (10) are respectively arranged at two ends of the other rotor shaft (4), a rotor body (11) is fixed on the outer wall of the rotor shaft (4), and a pump cavity (12) is arranged in the middle part of the Roots, the outer wall of the driving shaft (5) is provided with a fifth mechanical sealing element (14), a gear (13) is fixed on the outer wall of the end part of the driving shaft (5), the other end part of the driving shaft (5) is connected with an output shaft (16) through a coupler (17), a motor (15) is installed at the end part of the Roots vacuum pump body (1), and the end part of the motor (15) is connected with the output shaft (16).

2. A roots vacuum pump with 5 mechanical seal structures according to claim 1, characterized in that: the number of the rotor shafts (4) is two, and the rotor shafts (4) are designed in parallel.

3. A roots vacuum pump with 5 mechanical seal structures according to claim 1, characterized in that: the bearings (6) are symmetrically arranged around the central axis of the rotor shaft (4), and the number of the bearings (6) is four.

4. A roots vacuum pump with 5 mechanical seal structures according to claim 1, characterized in that: the first mechanical seal (7) and the second mechanical seal (8) are symmetrically arranged around the rotor shaft (4), and the first mechanical seal (7) and the second mechanical seal (8) are arranged in a nested manner with the rotor shaft (4).

5. A roots vacuum pump with 5 mechanical seal structures according to claim 1, characterized in that: the third mechanical seal (9) and the fourth mechanical seal (10) are arranged symmetrically with respect to the other rotor shaft (4), and the third mechanical seal (9) and the fourth mechanical seal (10) are designed to be nested with the other rotor shaft (4).

6. A roots vacuum pump with 5 mechanical seal structures according to claim 1, characterized in that: the avris of gear (13) is the slope design, gear (13) are provided with two, be the meshing connection between gear (13).