Anti-cavitation device for lubricating system of roll collar vertical type medium-speed coal mill
By setting up an automatic exhaust valve at the highest point of the lubricant oil pumping pipe and the lubricant oil return pipe, and combining a static mixer and an air cooler, the problem of cavitation in the roller ring vertical medium-speed coal mill reducer is solved, extending the service life of the equipment and reducing the gas content in the lubricant.
Patent Information
- Application Number
- CN202422405866.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-06
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-10-06
AI Technical Summary
The reducer of the roller ring vertical medium-speed coal mill in the circulation lubrication system collides with the lubricating oil after falling from the oil tank, resulting in a large number of bubbles, which in turn causes cavitation, damages the gears, and shortens the service life of the equipment.
A lubricating system anti-cavitation device is designed. Automatic exhaust valve A and automatic exhaust valve B are respectively set at the highest points of the lubricating oil pumping pipe and the lubricating oil return pipe, and combined with a static mixer and an air cooler, the gas in the lubricating oil is discharged to reduce the occurrence of cavitation.
It effectively reduces the occurrence of cavitation of the reducer, extends the service life of the reducer, and further reduces the gas content in the lubricating oil through a static mixer.
Smart Images
Figure CN223049365U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reducer lubrication, and in particular to an anti-cavitation device of a lubrication system of a roller ring vertical medium-speed coal mill. Background Art
[0002] The roller ring vertical medium-speed coal mill is a heavy equipment in the mine. Its reducer has a large load and generates a lot of heat. The reducer needs a circulating lubrication system to maintain its continuous operation. After circulation, the lubricating oil falls from the top of the oil tank and collides with the lubricating oil in the oil tank, generating a large number of bubbles. The oil suction port then sucks the lubricating oil with bubbles into the reducer to produce cavitation, resulting in corrosion damage to the gear surface and greatly reducing the service life of the equipment. Utility Model Content
[0003] In order to overcome the above-mentioned shortcomings, the utility model provides an anti-cavitation device for the lubrication system of a roller ring vertical medium-speed coal mill.
[0004] The technical solution adopted by this utility model:
[0005] A roller ring vertical medium-speed coal mill lubrication system anti-cavitation device comprises an oil tank and a reducer, the lower part of the oil tank is connected to a lubricating oil pump outlet pipeline, the lubricating oil pump outlet pipeline is connected to a lubricating oil inlet of the reducer, an oil pump is arranged on the lubricating oil pump outlet pipeline, the lubricating oil outlet of the reducer is connected to a lubricating oil return pipeline, and the lubricating oil return pipeline returns to the oil tank from the bottom of the other side of the oil tank 1;
[0006] The lubricating oil pump outlet pipeline is arranged vertically, the highest point of the lubricating oil pump outlet pipeline is on the upper part of the reducer, the highest point of the lubricating oil pump outlet pipeline is connected to the lubricating oil inlet of the reducer, the lubricating oil pump outlet pipeline is provided with an automatic exhaust valve A at its highest point, the lubricating oil return pipeline has a highest point, and the lubricating oil return pipeline is provided with an automatic exhaust valve B at its highest point;
[0007] The automatic exhaust valve A and the automatic exhaust valve B have the same structure. The automatic exhaust valve A includes an upper valve cover and a lower valve body. The lower valve body is a cavity structure. The upper valve cover and the lower valve body are fixedly connected by bolts. A sealing ring is provided between the upper valve cover and the lower valve body. The lower part of the lower valve body is fixedly connected to a threaded pipe joint. A float is provided in the lower valve body. A guide pipe is provided on the outside of the float. The guide pipe is slidably connected to the float. The guide pipe is fixed to the inside of the lower valve body through a support arm. The two ends of the support arm are fixedly connected to the guide pipe and the inner wall of the lower valve body respectively. The upper part of the float is fixedly connected to a conical valve core. An exhaust hole is opened on the upper part of the upper valve cover. The lower part of the exhaust hole is processed into a valve seat in the shape of a conical hole. The valve seat and the valve core cone cooperate to seal.
[0008] The lubricating oil pump outlet pipeline is equipped with a static mixer, and the static mixer is located at the lower part of the automatic exhaust valve A. The lubricating oil return pipeline is equipped with an air cooler, and the air cooler is installed at the lower part of the automatic exhaust valve B.
[0009] The guide pipe is provided with a defoaming net which is fixedly connected to the inner wall of the lower valve body.
[0010] Beneficial effects of the utility model:
[0011] By setting an automatic exhaust valve A at the highest point of the lubricating oil pump outlet pipeline and an automatic exhaust valve B at the highest point of the lubricating oil return pipeline, the gas contained in the lubricating oil is discharged here, which reduces the occurrence of cavitation in the reducer and increases the service life of the reducer. A static mixer is installed in the front end pipeline of the automatic exhaust valve A. The lubricating oil flows turbulently in the static mixer, and tiny bubbles collide with each other to form large bubbles that flow out, further reducing the gas content in the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model;
[0013] Figure 2 It is a structural schematic diagram of the automatic exhaust valve A and the automatic exhaust valve B in the utility model.
[0014] The specific reference numerals in all the drawings are: 1. oil tank; 2. oil pump; 3. reducer; 4. lubricating oil return pipe; 5. lubricating oil pump outlet pipe; 6. automatic exhaust valve A; 7. automatic exhaust valve B; 8. static mixer; 9. air cooler; 10. upper valve cover; 11. float; 12. valve core; 13. exhaust hole; 14. guide pipe, 15. support arm; 16. defoaming net; 17. threaded pipe joint, 18-lower valve body, 19-valve seat. DETAILED DESCRIPTION
[0015] like Figure 1-2 As shown: an anti-cavitation device for the lubrication system of a roller ring vertical medium-speed coal mill, comprising an oil tank 1 and a reducer 3, the lower part of the oil tank 1 is connected to a lubricating oil pump outlet pipeline 5, the lubricating oil pump outlet pipeline 5 is connected to a lubricating oil inlet of the reducer 3, an oil pump 2 is arranged on the lubricating oil pump outlet pipeline 5, the lubricating oil outlet of the reducer 3 is connected to a lubricating oil return pipeline 4, and the lubricating oil return pipeline 4 returns to the oil tank 1 from the bottom of the other side of the oil tank 1;
[0016] The lubricating oil pump outlet pipeline 5 is vertically arranged, the highest point of the lubricating oil pump outlet pipeline 5 is on the upper part of the reducer 3, the highest point of the lubricating oil pump outlet pipeline 5 is connected to the lubricating oil inlet of the reducer 3, the lubricating oil pump outlet pipeline 5 is provided with an automatic exhaust valve A6 at its highest point, the lubricating oil return pipeline 4 has a highest point, and the lubricating oil return pipeline 4 is provided with an automatic exhaust valve B7 at its highest point;
[0017] The automatic exhaust valve A6 and the automatic exhaust valve B7 have the same structure. The automatic exhaust valve A6 includes an upper valve cover 10 and a lower valve body 18. The lower valve body 18 is a cavity structure. The upper valve cover 10 and the lower valve body 18 are fixedly connected by bolts. A sealing ring is provided between the upper valve cover 10 and the lower valve body 18. The lower part of the lower valve body 18 is fixedly connected to a threaded pipe joint 17. A float 11 is provided in the lower valve body 18. A guide pipe 14 is provided on the outer side of the float 11. The guide pipe 14 is slidably connected to the float 11. The guide pipe 14 is fixed to the inside of the lower valve body 18 through a support arm 15. The two ends of the support arm 15 are fixedly connected to the guide pipe 14 and the inner wall of the lower valve body 18 respectively. A conical valve core 12 is fixedly connected to the upper part of the float 11. An exhaust hole 13 is opened on the upper part of the upper valve cover 10. The lower part of the exhaust hole 13 is processed into a valve seat 19 in the shape of a conical hole. The valve seat 19 and the valve core 12 are cone-matched and sealed.
[0018] The lubricating oil pump outlet pipeline 5 is installed with a static mixer 8, and the static mixer 8 is located below the automatic exhaust valve A6. The lubricating oil return pipeline 4 is installed with an air cooler 9, and the air cooler 9 is installed below the automatic exhaust valve B7.
[0019] The guide pipe 14 has a defoaming net 16 , and the defoaming net 16 is fixedly connected to the inner wall of the lower valve body 18 .
[0020] When the gas in the lubricating oil enters the automatic exhaust valve A6, the float 11 descends and the gas is discharged. When the liquid level in the automatic exhaust valve A6 rises, the float 11 rises, and the valve core 12 rises and closes with the valve seat 19 in a sealed manner.
[0021] The lubricating oil pump outlet pipe 5 is equipped with a static mixer 8 at the front end of the automatic exhaust valve A6. The lubricating oil flows turbulently in the static mixer 8, and tiny bubbles collide with each other to form large bubbles and flow out, thereby reducing the gas content in the lubricating oil. The lubricating oil return pipe 4 is equipped with an air cooler 9 at the rear end of the automatic exhaust valve B7 to cool the lubricating oil.
[0022] By arranging an automatic exhaust valve A6 at the highest point of the lubricating oil pump outlet pipe 5 and an automatic exhaust valve B7 at the highest point of the lubricating oil return pipe 4, the gas contained in the lubricating oil is discharged here, thereby reducing the occurrence of cavitation of the reducer 3 and improving the service life of the reducer 3. A static mixer 8 is installed in the front end pipeline of the automatic exhaust valve A6. The lubricating oil flows turbulently in the static mixer 8, and tiny bubbles collide with each other to form large bubbles that flow out, further reducing the gas content in the lubricating oil.
[0023] The lower valve body 18 is provided with a defoaming net 16 at the lower side of the float 11. The defoaming net 16 destroys the tiny bubbles in the lubricating oil into large bubbles, which is beneficial for not carrying the lubricating oil during exhaust.
Claims
1. A roller ring vertical medium-speed coal mill lubrication system anti-cavitation device, comprising an oil tank (1) and a reducer (3), characterized in that: The lower part of the oil tank (1) is connected to a lubricating oil pump outlet pipe (5), the lubricating oil pump outlet pipe (5) is connected to a lubricating oil inlet of a reducer (3), an oil pump (2) is arranged on the lubricating oil pump outlet pipe (5), the lubricating oil outlet of the reducer (3) is connected to a lubricating oil return pipe (4), and the lubricating oil return pipe (4) returns to the oil tank (1) from the bottom of the other side of the oil tank (1); The lubricating oil pump outlet pipeline (5) is arranged vertically, the highest point of the lubricating oil pump outlet pipeline (5) is on the upper part of the reducer (3), the highest point of the lubricating oil pump outlet pipeline (5) is connected to the lubricating oil inlet of the reducer (3), the lubricating oil pump outlet pipeline (5) is provided with an automatic exhaust valve A (6) at its highest point, the lubricating oil return pipeline (4) has a highest point, and the lubricating oil return pipeline (4) is provided with an automatic exhaust valve B (7) at its highest point; The automatic exhaust valve A (6) and the automatic exhaust valve B (7) have the same structure. The automatic exhaust valve A (6) comprises an upper valve cover (10) and a lower valve body (18). The lower valve body (18) is a hollow structure. The upper valve cover (10) and the lower valve body (18) are fixedly connected by bolts. A sealing ring is provided between the upper valve cover (10) and the lower valve body (18). The lower part of the lower valve body (18) is fixedly connected to a threaded pipe joint (17). A float (11) is provided inside the lower valve body (18). A guide pipe (14) is provided outside the float (11). The guide tube (14) is slidably connected to the float (11), the guide tube (14) is fixed inside the lower valve body (18) through a support arm (15), the two ends of the support arm (15) are respectively fixedly connected to the guide tube (14) and the inner wall of the lower valve body (18), the upper part of the float (11) is fixedly connected to the conical valve core (12), the upper part of the upper valve cover (10) is provided with an exhaust hole (13), the lower part of the exhaust hole (13) is processed into a conical hole-shaped valve seat (19), and the valve seat (19) and the valve core (12) are conically matched and sealed.
2. The device for preventing cavitation of a lubrication system of a roller ring vertical medium-speed coal mill according to claim 1, characterized in that: The lubricating oil pump outlet pipe (5) is equipped with a static mixer (8), and the static mixer (8) is located below the automatic exhaust valve A (6). The lubricating oil return pipe (4) is equipped with an air cooler (9), and the air cooler (9) is located below the automatic exhaust valve B (7).
3. The device for preventing cavitation of a lubrication system of a roller ring vertical medium-speed coal mill according to claim 1, characterized in that: The guide tube (14) has a defoaming net (16), and the defoaming net (16) is fixedly connected to the inner wall of the lower valve body (18).