CN114458601B

CN114458601B - Roots vacuum pump lubricating structure

Info

Publication number: CN114458601B
Application number: CN202111627054.7A
Authority: CN
Inventors: 李昌龙; 王云; 毕德龙; 徐静怡; 费贤
Original assignee: Zhongkeyi Nantong Semiconductor Equipment Co ltd
Current assignee: Zhongkeyi Nantong Semiconductor Equipment Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-12-16
Anticipated expiration: 2041-12-29
Also published as: CN114458601A

Abstract

The invention discloses a lubrication structure of a Roots vacuum pump, which relates to the technical field of vacuum pumps and comprises a pump body of the vacuum pump, wherein a shell is arranged on one side of the pump body, two groups of rotating shafts are arranged in the shell, one ends of the two groups of rotating shafts penetrate through the pump body and are provided with fan blades, and one ends of the two rotating shafts are provided with bearings and oil injection devices matched with the bearings for use; the oiling device comprises two oil suction discs and an oil immersion box sleeved outside the bearing, wherein oil pumping assemblies are installed at the lower ends of the oil suction discs, oil guide pipes are arranged at the upper ends of the oil suction discs, penetrate through the shell and extend to the outside, and filtering assemblies are arranged between the oil guide pipes. According to the invention, the flow of air is accelerated through the rotation of the first fan blade in the heat dissipation assembly, so that heat dissipation is carried out on the heat dissipation fins, the temperature of lubricating oil is further reduced, and the use of a bearing is protected.

Description

Roots vacuum pump lubricating structure

Technical Field

The invention relates to the technical field of vacuum pumps, in particular to a Roots vacuum pump lubricating structure.

Background

The Roots vacuum pump is tested for long-term operation in devices such as petroleum, chemical engineering, plastics, pesticides, dynamic balance of steam turbine rotors, aerospace space simulation and the like, so 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. The vacuum pump accessory is used as a vacuum pump silencer and is used for noise control of the vacuum pump.

When the vacuum pump starts, the main shaft rotates at a high speed, the main shaft rubs with the bearing, high heat can be generated, the temperature in the bearing box rises, the bearing and the main shaft are easily damaged, and the production cost of an enterprise is increased.

Disclosure of Invention

The invention aims to: in order to solve the problems, the lubrication structure of the roots vacuum pump is provided.

In order to realize the purpose, the lubrication structure of the Roots vacuum pump adopts the following technical scheme: the vacuum pump comprises a pump body of a vacuum pump, wherein a shell is arranged on one side of the pump body, two groups of rotating shafts are arranged in the shell, one ends of the two groups of rotating shafts penetrate through the pump body and are provided with fan blades, and one ends of the two rotating shafts are provided with bearings and oil injection devices matched with the bearings for use;

the oil injection device comprises two oil suction discs and oil immersion boxes sleeved outside the bearing, oil pumping assemblies are mounted at the lower ends of the two oil suction discs, oil guide pipes are arranged at the upper ends of the two oil suction discs, the oil guide pipes penetrate through the shell and extend to the outside, a filter assembly is arranged between the two oil guide pipes extending to the outside, and a connecting pipe is arranged in the middle of the filter assembly and is connected with the two oil immersion boxes respectively;

the filter assembly comprises a filter box, the oil guide pipe is respectively communicated with two ends of the filter box, a sealing cover is mounted at the upper end of the filter box, a plurality of partition plates are arranged inside the filter box, sealing gaskets are arranged at the lower ends of the partition plates, a plurality of groups of through holes are formed in the surfaces of the partition plates, two groups of first filter cavities, two groups of second filter cavities and a central cavity are separated from the inside of the filter box through the plurality of partition plates, the connecting pipe is communicated with the central cavity, and a heat dissipation assembly is arranged in the middle of the filter box;

the heat dissipation assembly comprises a connecting rod which is rotatably connected with the sealing cover, the connecting rod penetrates through the sealing cover and extends to the outside, a first fan blade is installed on the outer wall of the connecting rod which extends to the outside, a second fan blade is arranged at the other end of the connecting rod, and the second fan blade is located inside the connecting pipe.

Further, the filter cartridge and the sealing cover are made of a heat conductive material.

Further, the outer walls of the filter box and the sealing cover are provided with radiating fins, the radiating fins are provided with a plurality of groups of through holes, and rectangular through holes matched with the first fan blades are formed in the radiating fins at the middle position of the upper end of the sealing cover.

Furthermore, the inside of first filter chamber and second filter chamber is provided with fibre filter pulp and active carbon filter pulp respectively.

Further, the inner diameter of the connecting pipe is smaller than that of the oil guide pipe.

Further, the oil suction disc comprises an oval disc and an annular shell fixed inside the shell, wherein two ends of the oval disc are respectively provided with a disc, and the outer wall of the disc is rotatably connected with the annular shell.

Further, the oil pumping subassembly includes the mounting panel that slides and set up with the annular shell, the gyro wheel is installed to the upper end of mounting panel, the lower extreme of mounting panel is provided with reset spring, gyro wheel and oval dish surface laminating, the fixed installation pole that is provided with of lower extreme in the middle of the mounting panel, the piston is installed to the lower extreme of installation pole, the inlet port has been seted up from top to bottom to the piston, be provided with the check valve in the inlet port, the lower extreme of annular shell is provided with the piston cylinder that the cooperation piston used.

Compared with the prior art, the invention has the following beneficial effects:

this roots vacuum pump lubricating structure, the rotation through the first flabellum among the radiator unit, the flow of air with higher speed to dispel the heat to the fin, and then reduce the temperature of lubricating oil, the use of protection bearing.

Drawings

FIG. 1 is a schematic overall structure diagram of a lubrication structure of a Roots vacuum pump according to the present invention;

FIG. 2 is a schematic view of the connection between the oil suction disc and the filter assembly of the lubrication structure of the Roots vacuum pump according to the present invention;

FIG. 3 is a schematic view showing the connection between the filter assembly and the oil immersion box in a pre-installed state of a fixing device of a lubrication structure of a Roots vacuum pump according to the present invention;

FIG. 4 is a schematic structural diagram of a heat dissipation assembly of a lubrication structure of a Roots vacuum pump according to the present invention;

FIG. 5 is a schematic structural diagram of an oil immersion box of a lubrication structure of a Roots vacuum pump according to the present invention;

FIG. 6 is a schematic structural diagram of an oil suction disc of a lubrication structure of a Roots vacuum pump according to the present invention.

In the figure: 1. a pump body; 2. a housing; 3. an oiling device; 301. an oil suction disc; 3011. a disc; 3012. an annular shell; 3013. an elliptical disk; 3014. a piston cylinder; 302. a filter assembly; 3021. a filter cartridge; 3022. a sealing cover; 3023. a partition plate; 3024. a gasket; 3025. a second filter chamber; 3026. a first filter chamber; 3027. a concentration chamber; 3028. a heat sink; 303. a connecting pipe; 305. an oil immersion box; 306. a heat dissipating component; 3061. a first fan blade; 3062. a connecting rod; 3063. a second fan blade; 307. an oil guide pipe; 4. a rotating shaft; 5. an oil pumping assembly; 501. mounting a rod; 502. a piston; 503. mounting a plate; 504. a return spring; 505. a roller; 6. and a bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-6, a lubrication structure of a roots vacuum pump comprises a pump body 1 of the vacuum pump, wherein a shell 2 is arranged on one side of the pump body 1, two groups of rotating shafts 4 are arranged inside the shell 2, one ends of the two groups of rotating shafts 4 penetrate through the pump body 1 and are provided with fan blades, and one ends of the two groups of rotating shafts 4 are provided with a bearing 6 and an oil injection device 3 matched with the bearing 6 for use;

the oiling device 3 comprises two oil suction discs 301 and oil immersion boxes 305 sleeved outside the bearing 6, oil pumping assemblies 5 are mounted at the lower ends of the two oil suction discs 301, oil guide pipes 307 are arranged at the upper ends of the two oil suction discs 301, the oil guide pipes 307 penetrate through the shell 2 and extend to the outside, a filtering assembly 302 is arranged between the two oil guide pipes 307 extending to the outside, a connecting pipe 303 is arranged in the middle of the filtering assembly 302, and the connecting pipe 303 is respectively connected with the two oil immersion boxes 305;

the filtering assembly 302 comprises a filtering box 3021, the oil conduit 307 is respectively communicated with two ends of the filtering box 3021, a sealing cover 3022 is installed at the upper end of the filtering box 3021, a plurality of partition boards 3023 are arranged inside the filtering box 3021, a sealing gasket 3024 is arranged at the lower end of each partition board 3023, a plurality of groups of through holes are formed in the surface of each partition board 3023, two groups of first filtering cavities 3026, two groups of second filtering cavities 3025, and a central cavity 3027 are separated from the inside of the filtering box 3021 by the plurality of partition boards 3023, the connecting pipe 303 is communicated with the central cavity 3027, and a heat dissipation assembly 306 is arranged in the middle of the filtering box 3021;

the heat dissipation assembly 306 includes a connecting rod 3062 rotatably connected to the sealing cover 3022, the connecting rod 3062 penetrates the sealing cover 3022 and extends to the outside, a first fan 3061 is mounted on the outer wall of the connecting rod 3062 extending to the outside, a second fan 3063 is disposed at the other end of the connecting rod 3062, and the second fan 3063 is located inside the connecting pipe 303.

Further, the filter cassette 3021 and the sealing cover 3022 are made of a heat conductive material, so that heat inside the filter cassette 3021 is transferred to the outside, thereby reducing the temperature of the lubricating oil.

Further, the outer walls of the filter box 3021 and the sealing cover 3022 are both provided with a plurality of radiating fins 3028, the radiating fins 3028 are provided with a plurality of groups of through holes, and the radiating fin 3028 at the middle position of the upper end of the sealing cover 3022 is provided with a rectangular through hole used in cooperation with the first fan blade 3061; the heat dissipation area of the filter cassette 3021 and the outer wall of the sealing cover 3022 is increased by the heat sink 3028.

Further, the first filtering cavity 3026 and the second filtering cavity 3025 are respectively provided therein with fiber filter cotton and activated carbon filter cotton, and the fiber filter cotton and the activated carbon filter cotton are passed through.

Further, the inner diameter of the connection pipe 303 is smaller than the inner diameter of the oil guide pipe 307, so that the lubricating oil is accelerated to flow after entering the inside of the connection pipe 303, thereby increasing the rotation speed of the second fan 3063.

Further, the oil suction disc 301 comprises an elliptical disc 3013 and an annular shell 3012 fixed inside the shell 2, two ends of the elliptical disc 3013 are respectively provided with a disc 3011, and the outer wall of the disc 3011 is rotatably connected with the annular shell 3012.

Further, the oil pumping assembly 5 comprises a mounting plate 503 which is arranged in a sliding mode with the annular shell 3012, a roller 505 is mounted at the upper end of the mounting plate 503, a return spring 504 is arranged at the lower end of the mounting plate 503, the roller 505 is attached to the surface of the elliptical disc 3013, a mounting rod 501 is fixedly arranged at the lower end of the middle of the mounting plate 503, a piston 502 is mounted at the lower end of the mounting rod 501, an oil inlet hole is formed in the piston 502 from top to bottom, a one-way valve is arranged in the oil inlet hole, and a piston cylinder 3014 which is matched with the piston 502 for use is arranged at the lower end of the annular shell 3012.

The working principle is as follows: when the vacuum pump works, the rotating shaft 4 rotates, the rotating shaft 4 drives the oil suction disc 301 to rotate, the roller 505 is driven to move downwards by the oval disc 3013 in the middle of the oil suction disc 301, the return spring 504 enables the roller 505 to be attached to the oval disc 3013, so that the roller 505 moves up and down, the roller 505 drives the piston 502 to move up and down by the mounting rod 501, because the one-way valve is arranged in the piston 502, lubricating oil enters the annular shell 3012, the lubricating oil enters the filter assembly 302 from the oil guide pipe 307, the lubricating oil is filtered by the second filter cavity 3025 and the first filter cavity 3026, impurities in the lubricating oil are removed, meanwhile, after the lubricating oil enters the filter 3021, the temperature of the lubricating oil is transmitted to the partition 3023, the filter 3021 and the seal 3022, and finally transmitted to the cooling fin 3028, meanwhile, the lubricating oil drives the second fan 3063 to rotate in the flowing connecting pipe 303, the second fan 3063 drives the first fan 3061 to rotate by the connecting rod 3062, so that the flow of air is accelerated, the cooling fin 3028 is cooled, the temperature of the lubricating oil is reduced, and the use of the bearing 6 is protected.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. A lubrication structure of a Roots vacuum pump comprises a pump body (1) of the vacuum pump, wherein a shell (2) is arranged on one side of the pump body (1), two groups of rotating shafts (4) are arranged inside the shell (2), and one ends of the two groups of rotating shafts (4) penetrate through the pump body (1) and are provided with fan blades, and the lubrication structure is characterized in that one ends of the two rotating shafts (4) are provided with bearings (6) and oil injection devices (3) matched with the bearings (6) for use;

the oiling device (3) comprises two oil suction discs (301) and an oil immersion box (305) sleeved outside a bearing (6), oil pumping assemblies (5) are mounted at the lower ends of the two oil suction discs (301), oil guide pipes (307) are arranged at the upper ends of the two oil suction discs (301), the oil guide pipes (307) penetrate through the shell (2) and extend to the outside, a filtering assembly (302) is arranged between the two oil guide pipes (307) extending to the outside, a connecting pipe (303) is arranged in the middle of the filtering assembly (302), and the connecting pipe (303) is respectively connected with the two oil immersion boxes (305);

the filtering assembly (302) comprises a filtering box (3021), the oil guide pipe (307) is respectively communicated with two ends of the filtering box (3021), a sealing cover (3022) is installed at the upper end of the filtering box (3021), a plurality of partition plates (3023) are arranged inside the filtering box (3021), a sealing gasket (3024) is arranged at the lower end of each partition plate (3023), a plurality of groups of through holes are formed in the surface of each partition plate (3023), two groups of first filtering cavities (3026), two groups of second filtering cavities (3025) and a concentration cavity (3027) are separated from the inside of the filtering box (3021) through the plurality of partition plates (3023), the connecting pipe (303) is communicated with the concentration cavity (3027), and a heat dissipation assembly (306) is arranged in the middle position of the filtering box (3021);

the heat dissipation assembly (306) comprises a connecting rod (3062) rotatably connected with a sealing cover (3022), the connecting rod (3062) penetrates through the sealing cover (3022) and extends to the outside, a first fan blade (3061) is installed on the outer wall of the connecting rod (3062) extending to the outside, a second fan blade (3063) is arranged at the other end of the connecting rod (3062), and the second fan blade (3063) is located inside the connecting pipe (303).

2. A roots vacuum pump lubrication structure as claimed in claim 1, wherein the filter cassette (3021) and sealing cap (3022) are made of heat conductive material.

3. A lubrication structure of a roots vacuum pump according to claim 1, wherein the filter box (3021) and the sealing cover (3022) are provided with radiating fins (3028) on the outer wall, the radiating fins (3028) are provided with a plurality of groups of through holes, and the radiating fins (3028) at the middle position of the upper end of the sealing cover (3022) are provided with rectangular through holes matched with the first fan blade (3061).

4. A roots vacuum pump lubrication structure according to claim 1, characterized in that the inside of the first filter chamber (3026) and the second filter chamber (3025) are respectively provided with fiber filter cotton and activated carbon filter cotton.

5. A roots vacuum pump lubrication structure according to claim 1, wherein the inside diameter of the connection pipe (303) is smaller than the inside diameter of the oil guide pipe (307).

6. A lubrication structure of a roots vacuum pump according to claim 1, wherein the oil suction disc (301) comprises an elliptical disc (3013) and an annular shell (3012) fixed inside the housing (2), the elliptical disc (3013) is provided with discs (3011) at its two ends, and the annular shell (3012) is rotatably connected to the outer wall of the disc (3011).

7. The lubrication structure of a roots vacuum pump according to claim 6, wherein the oil pumping assembly (5) comprises a mounting plate (503) slidably arranged with an annular shell (3012), a roller (505) is mounted at the upper end of the mounting plate (503), a return spring (504) is arranged at the lower end of the mounting plate (503), the roller (505) is attached to the surface of the oval disc (3013), a mounting rod (501) is fixedly arranged at the lower end of the middle of the mounting plate (503), a piston (502) is mounted at the lower end of the mounting rod (501), an oil inlet is formed in the piston (502) from top to bottom, a check valve is arranged in the oil inlet, and a piston cylinder (3014) matched with the piston (502) is arranged at the lower end of the annular shell (3012).