Oil throwing structure for oil lubrication in narrow space
By designing an oil-lubricated oil-shrinking structure including bearing seat, inner pressure gland, oil-shrinking ring and rotor in a narrow space, the problem of poor lubricating oil circulation is solved, and the smooth circulation of lubricating oil and the stable cooling effect of the bearing is achieved.
Patent Information
- Application Number
- CN202411619506.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-01-03
AI Technical Summary
In a narrow space, the traditional oil barrier ring structure cannot effectively ensure the smooth circulation of lubricating oil and the stability of the bearing, resulting in insufficient lubrication and temperature increase, causing failure.
An oil-lubricated oil-swinging structure including a bearing seat, an inner pressure gland, an oil-swinging ring, a rotor and an end cap is designed. The outer circle of the oil-swinging ring has an oil sealing teeth and an annular chamber, and a communication is formed between the inner pressure gland and the bearing seat. The hole ensures the circulation and sealing of the lubricant oil. There is a balanced air pressure hole on the top of the bearing seat to ensure smooth oil return.
The effective circulation and sealing of lubricating oil are achieved, the problems of insufficient lubrication and temperature increase are avoided, and the stable operation and cooling effect of the bearing are ensured.
Smart Images
Figure CN119244914A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an oil-swinging structure for oil lubrication in a narrow space. Background Art
[0002] As the core component of rotating machinery, bearings play a decisive role in the smooth and safe operation of equipment. In order to ensure the stability of the shaft system and the good operation of the bearings, reliable and effective lubrication and cooling are necessary. Especially when the oil return space is narrow, it is easy to have insufficient lubrication, poor oil return, and rapid increase in bearing temperature, causing failures.
[0003] In the design of turbine compressors and expanders, in order to ensure the smooth circulation of lubricating oil, an oil baffle ring structure is generally used. The oil baffle ring can quickly throw the lubricating oil after lubrication to the oil return chamber to ensure the normal circulation of the lubricating oil, thereby ensuring the cooling effect of the lubricating oil. However, this oil baffle ring structure is not suitable for narrow spaces. It is urgent to design a new oil-throwing structure suitable for narrow spaces to ensure that the lubricating oil of turbine compressors and expanders with such requirements can circulate smoothly and the stability of the shaft system. Summary of the invention
[0004] The purpose of the present invention is to solve the above-mentioned problems, thereby providing an oil-swinging structure for oil lubrication in a narrow space.
[0005] The above purpose is achieved through the following technical solutions: An oil-slinging structure for oil lubrication in a narrow space, comprising: a bearing seat, an inner pressure cover, an oil-slinging ring, a rotor and an end cover, wherein the rotor is connected to the bearing seat via a bearing, an oil-slinging ring is sleeved on the rotor, the oil-slinging ring is fixed to the inner ring of the bearing, an inner pressure cover is sleeved on the oil-slinging ring, and the inner pressure cover is fixed to the bearing seat via bolts; The outer circle of the oil slinger ring has at least one set of oil seal teeth; An annular first chamber for passing oil is formed between the oil slinger ring and the bearing; An annular second chamber for oil throwing is formed between the oil throwing ring and the inner pressure cover; An annular third chamber for oil throwing is formed between the inner pressure cover and the bearing seat; The inner pressure cover is provided with a connecting hole for connecting the second chamber and the third chamber.
[0006] The oil-slinging structure for oil lubrication in a narrow space has a plurality of evenly distributed flying oil grooves and three evenly distributed returning oil grooves on the end surface of the oil-slinging ring.
[0007] The oil-spinning structure for oil lubrication in a narrow space, wherein the oil-spinning groove is an R16 arc surface groove.
[0008] The oil-swinging structure for oil lubrication in a narrow space, wherein the oil return groove is a straight groove with a width of 13 mm.
[0009] The oil-slinging structure is used for oil lubrication in a narrow space. The outer ring surface of the oil-slinging ring is stepped, and each step surface has a group of oil seal teeth. The radial clearance between the oil seal teeth and the inner hole of the inner pressure cover is 0.4-0.45mm.
[0010] The oil-swinging structure for oil lubrication in a narrow space is provided with a balanced air pressure hole on the top of the bearing seat. Beneficial Effects
[0011] 1. The outer circle of the oil slinger ring of the present invention is also designed with two sets of oil seal teeth, and the radial clearance between the oil seal teeth and the inner hole of the inner gland is 0.4-0.45mm, forming a labyrinth seal to ensure that the lubricating oil does not enter the interior of the unit and ensure the effectiveness of the seal.
[0012] 2. A balanced air pressure hole is designed on the top of the bearing seat of the present invention to ensure that the inside of the bearing box and the sealing chamber are connected, avoid clogging of the oil return hole, and ensure smooth oil return.
[0013] 3. The inner gland of the present invention is designed with an oil return hole to ensure that a small amount of lubricating oil entering the sealing area can flow back to the oil return chamber.
[0014] 4. The end surface of the oil slinger ring of the present invention is provided with 30 evenly distributed R16 arc surface grooves to ensure that the lubricating oil flies out along the arc grooves under the action of centrifugal force and directly enters the third chamber. The end surface of the oil slinger ring is also provided with 3 evenly distributed straight grooves with a width of 13mm. The lubricating oil that is not thrown away can enter these straight grooves and eventually flow into the third chamber as the rotor rotates. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural diagram of the oil slinger; In the figure: 1. bearing seat; 2. inner pressure cover; 3. oil slinger; 4. rotor; 5. bearing; 6. oil injector; 7. end cover; 8. balance air pressure hole; 9. connecting hole; 10. first chamber; 11. second chamber; 12. third chamber; 13. oil sealing tooth; 3-1. flying oil groove; 3-2. return oil groove. DETAILED DESCRIPTION
[0016] Reference Figure 1, an oil-slinging structure for oil lubrication in a narrow space, comprising: a bearing seat 1, an inner pressure cover 2, an oil-slinging ring 3, a rotor 4 and an end cover 7, wherein the rotor and the bearing seat are connected via a bearing 5, an oil-slinging ring is sleeved on the rotor, and the oil-slinging ring is fixed to the inner ring of the bearing, an inner pressure cover is sleeved on the oil-slinging ring, and the inner pressure cover is fixed to the bearing seat via bolts; The outer circle of the oil slinger ring has at least one set of oil seal teeth 13, and the radial clearance between the oil seal teeth and the inner hole of the inner gland is 0.4-0.45mm, forming a labyrinth seal to ensure that the lubricating oil does not enter the unit and ensure the effectiveness of the seal; An annular first chamber 10 for passing oil is formed between the oil slinger ring and the bearing; An annular second chamber 11 for oil throwing is formed between the oil throwing ring and the inner pressure cover; An annular third chamber 12 for oil throwing is formed between the inner gland and the bearing seat; The inner pressure cover is provided with a connecting hole 9 for connecting the second chamber with the third chamber; A balance air pressure hole 8 is provided on the top of the bearing seat to ensure that the bearing box and the sealing chamber are connected, so that the pressure in the bearing box is the same as the pressure in the third chamber, thereby ensuring smooth oil return and avoiding blockage of the oil return hole. An oil return hole 14 is provided at the bottom for returning lubricating oil; This structure can effectively realize the flow circulation of lubricating oil of the bearing, is suitable for the situation of narrow space, and can also ensure the cooling effect of the bearing; The lubricating oil is sprayed from the oil spray nozzle onto the bearing to lubricate and cool the bearing. The lubricating oil after passing through the bearing enters the first chamber, and then is thrown by the arc groove on the end face of the oil slinger ring to the third chamber of the inner pressure cover and the bearing seat, and flows back to the bearing box through the oil return hole 14 at the bottom of the bearing seat. If a small amount of lubricating oil enters the second chamber of the oil slinger ring and the inner pressure cover through the oil seal teeth, it will flow back to the third chamber from the oil return hole at the bottom of the inner pressure cover, and eventually flow back to the bearing box. The lubricating oil flows as described above, forming an oil inlet and return cycle, ensuring reliable cooling of the bearing; The outer ring surface of the oil slinger is stepped, and each step surface is provided with a group of oil seal teeth. The radial clearance between the oil seal teeth and the inner hole of the inner gland is 0.4-0.45mm, forming a labyrinth seal to ensure that the lubricating oil does not enter the unit and ensure the effectiveness of the seal. Reference Figure 2The end face of the oil slinger ring is provided with a plurality of evenly distributed oil-flying grooves 3-1 and three evenly distributed oil-returning grooves 3-2. The oil-flying grooves are R16 arc surface grooves, and the oil-returning grooves are straight grooves with a width of 13 mm. Two types of grooves are provided to ensure the reliability and accuracy of oil slinging. The end face of the oil slinger ring is provided with 30 evenly distributed R16 arc surface grooves to ensure that the lubricating oil directly enters the third chamber after flying out along the arc grooves under the action of centrifugal force. The end face of the oil slinger ring is also provided with three evenly distributed straight grooves with a width of 13 mm. The lubricating oil that is not slinged away can enter these straight grooves and eventually flow into the third chamber as the rotor rotates.
Claims
1. An oil-swinging structure for oil lubrication in a narrow space, characterized by: The components include: a bearing seat, an inner pressure cover, an oil slinger, a rotor and an end cover. The rotor is connected to the bearing seat through a bearing. The rotor is covered with an oil slinger, which is fixed to the inner ring of the bearing. The oil slinger is covered with an inner pressure cover, which is fixed to the bearing seat through bolts. The outer circle of the oil slinger ring has at least one set of oil seal teeth; An annular first chamber for passing oil is formed between the oil slinger ring and the bearing; An annular second chamber for oil throwing is formed between the oil throwing ring and the inner pressure cover; An annular third chamber for oil throwing is formed between the inner pressure cover and the bearing seat; The inner pressure cover is provided with a connecting hole for connecting the second chamber and the third chamber.
2. The oil-swinging structure for oil lubrication in a narrow space according to claim 1 is characterized by: The end surface of the oil slinger ring is provided with a plurality of evenly distributed oil-slinging grooves and three evenly distributed oil-returning grooves.
3. The oil-swinging structure for oil lubrication in a narrow space according to claim 2 is characterized by: The oil-flying groove is an R16 arc surface groove.
4. The oil-swinging structure for oil lubrication in a narrow space according to claim 2 is characterized by: The oil return groove is a straight groove with a width of 13 mm.
5. The oil-spinning structure for oil lubrication in a narrow space according to claim 1 is characterized by: The outer ring surface of the oil slinger is stepped, and each step surface is provided with a group of oil seal teeth. The radial clearance between the oil seal teeth and the inner hole of the inner pressure cover is 0.4-0.45mm.
6. The oil-swinging structure for oil lubrication in a narrow space according to claim 1 is characterized by: A balance air pressure hole is provided on the top of the bearing seat.