Oil throwing structure for oil lubrication in narrow space
By designing an oil-lubricated oil-swinging structure for narrow spaces, including labyrinth seals, balanced air pressure holes and oil return holes, the problems of insufficient lubrication and poor oil return are solved, the smooth circulation of lubricating oil and the stability of the shaft system are achieved, and the reliable cooling effect of the bearing is ensured.
Patent Information
- Application Number
- CN202422768037.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-11-13
AI Technical Summary
In a narrow space, the bearing is not lubricated sufficiently and the oil return is not smooth, which causes the bearing temperature to rise rapidly and causes failure. The existing oil barrier ring structure is not suitable for situations where space is small, and it cannot guarantee the smooth circulation of lubricant and the stability of the shaft system.
An oil-lubricated oil-swing structure for tight spaces is designed, including bearing seats, inner pressure caps, oil-swing rings, rotors and end caps. The outer circle of the oil-swing ring has oil seal teeth to form a maze seal; a balanced air pressure hole is designed on the top of the bearing seat to ensure smooth oil return; an oil return hole is designed on the inner pressure gland to ensure the return of lubricant oil; a flying oil groove and a return groove are opened on the end surface of the oil-swing ring to ensure the effective oil-swing and return of lubricant oil.
It realizes smooth circulation of lubricant and stability of the shaft system, avoids the problems of insufficient lubrication and poor oil return, and ensures the reliable cooling effect of the bearing.
Smart Images
Figure CN223004792U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an oil lubrication oil throwing structure for narrow spaces. Background Art
[0002] As a core component of rotating machinery, bearings play a decisive role in the stable and safe operation of equipment. To ensure the stable operation of the shafting and the good operation of bearings, reliable and effective lubrication and cooling are essential conditions. Especially when the oil return space is narrow, it is easy to occur insufficient lubrication, unsmooth oil return, rapid increase in bearing temperature, and cause failures.
[0003] In the design of turbo compressors and expanders, in order to ensure the smooth circulation of lubricating oil, an oil retaining ring structure is generally adopted. The oil retaining ring can quickly throw the lubricated oil into the oil return chamber to ensure the normal circulation of the lubricating oil, thereby ensuring the cooling effect of the lubricating oil. However, this kind of oil retaining ring structure is not applicable to narrow spaces, and it is urgent to newly design an oil throwing structure suitable for narrow spaces to ensure the smooth circulation of lubricating oil and the stability of the shafting for turbo compressors and expanders with such requirements. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the above-mentioned problems, thereby providing an oil lubrication oil throwing structure for narrow spaces.
[0005] The above purpose is achieved by the following technical solutions:
[0006] An oil lubrication oil throwing structure for narrow spaces, which comprises: a bearing housing, an inner gland, an oil throwing ring, a rotor and an end cover. The rotor is connected to the bearing housing through a bearing. An oil throwing ring is sleeved on the rotor. The oil throwing ring is fixed to the inner ring of the bearing. An inner gland is sleeved on the oil throwing ring. The inner gland is fixed to the bearing housing by bolts;
[0007] The outer circle of the oil throwing ring has at least one group of oil seal teeth;
[0008] An annular first chamber for oil passage is formed between the oil throwing ring and the bearing;
[0009] An annular second chamber for oil throwing is formed between the oil throwing ring and the inner gland;
[0010] An annular third chamber for oil throwing is formed between the inner gland and the bearing housing;
[0011] A communication hole for communicating the second chamber and the third chamber is opened on the inner gland.
[0012] A kind of oil lubrication oil slinging structure for narrow space, wherein a plurality of uniformly distributed oil throwing grooves and 3 uniformly distributed oil return grooves are formed on the end face of the oil slinging ring.
[0013] A kind of oil lubrication oil slinging structure for narrow space, wherein the oil throwing groove is an arc surface groove with an R16 radius.
[0014] A kind of oil lubrication oil slinging structure for narrow space, wherein the oil return groove is a straight groove with a width of 13 mm.
[0015] A kind of oil lubrication oil slinging structure for narrow space, wherein the outer ring surface of the oil slinging ring is stepped, and a group of oil seal teeth are provided at each stepped surface. The radial clearance between the oil seal teeth and the inner hole of the inner gland is 0.4 - 0.45 mm.
[0016] A kind of oil lubrication oil slinging structure for narrow space, wherein a balance air pressure hole is provided at the top of the bearing housing. Beneficial effects
[0017] 1. In the oil slinging ring of the present utility model, two groups of oil seal teeth are also designed on the outer circle. The radial clearance between the oil seal teeth and the inner hole of the inner gland is 0.4 - 0.45 mm, forming a labyrinth seal to ensure that the lubricating oil will not enter the internal part of the unit and ensure the effectiveness of the seal.
[0018] 2. In the present utility model, a balance air pressure hole is designed at the top of the bearing housing to ensure the connection between the bearing box and the sealing chamber, avoid the blockage of the oil return hole, and ensure smooth oil return.
[0019] 3. In the present utility model, an oil return hole is designed on the inner gland to ensure that a small amount of lubricating oil entering the sealing area can flow back to the oil return chamber.
[0020] 4. In the present utility model, 30 uniformly distributed R16 arc surface grooves are formed on the end face of the oil slinging ring to ensure that the lubricating oil flies out along the arc groove under the action of centrifugal force and directly enters the third chamber. 3 uniformly distributed straight grooves with a width of 13 mm are also formed on the end face of the oil slinging ring. The lubricating oil that is not thrown away can enter these straight grooves and finally flow into the third chamber as the rotor rotates. Description of the drawings
[0021] Figure 1 is the structural schematic diagram of the present utility model;
[0022] Figure 2 is the structural schematic diagram of the oil slinging ring;
[0023] In the figure: 1, bearing housing; 2, inner gland; 3, oil slinging ring; 4, rotor; 5, bearing; 6, oil injector; 7, end cover; 8, balance air pressure hole; 9, communication hole; 10, first chamber; 11, second chamber; 12, third chamber; 13, oil sealing teeth; 3-1, oil throwing groove; 3-2, oil return groove. Specific implementation mode
[0024] Referring to Figure 1 , an oil slinging structure for lubrication in a narrow space, which comprises: a bearing housing 1, an inner gland 2, an oil slinger 3, a rotor 4 and an end cover 7. The rotor is connected to the bearing housing through a bearing 5. An oil slinger is sleeved on the rotor, and the oil slinger is fixed to the inner ring of the bearing. An inner gland is sleeved on the oil slinger, and the inner gland is fixed to the bearing housing by bolts;
[0025] The outer circle of the oil slinger has at least one group of oil seal teeth 13. The radial clearance between the oil seal teeth and the inner hole of the inner gland is 0.4 - 0.45 mm, forming a labyrinth seal to ensure that lubricating oil does not enter the internal part of the unit and ensure the effectiveness of the seal;
[0026] An annular first chamber 10 for oil passage is formed between the oil slinger and the bearing;
[0027] An annular second chamber 11 for oil slinging is formed between the oil slinger and the inner gland;
[0028] An annular third chamber 12 for oil slinging is formed between the inner gland and the bearing housing;
[0029] A communication hole 9 for communicating the second chamber and the third chamber is provided on the inner gland;
[0030] A balance air pressure hole 8 is provided at the top of the bearing housing to ensure the connection between the bearing housing and the sealing chamber, so that the pressure in the bearing housing is the same as the pressure in the third chamber, thus ensuring smooth oil return and avoiding blockage of the oil return hole. An oil return hole 14 is provided at the bottom for the lubricating oil to return;
[0031] This structure can effectively realize the lubricating oil flow cycle of the bearing, is applicable to narrow space conditions, and can also ensure the cooling effect of the bearing;
[0032] The lubricating oil is sprayed from the oil injector onto the bearing to lubricate and cool the bearing. The lubricating oil after passing through the bearing enters the first chamber, and then is slung by the arc-shaped groove on the end face of the oil slinger into the third chamber between the inner gland and the bearing housing, and flows back into the bearing housing through the oil return hole 14 at the bottom of the bearing housing. If a small amount of lubricating oil enters the second chamber between the oil slinger and the inner gland through the oil seal teeth, it will flow back to the third chamber through the oil return hole at the bottom of the inner gland and finally flow back into the bearing housing. The lubricating oil flows as described above to form an inlet and return oil cycle, ensuring reliable cooling of the bearing;
[0033] The outer ring surface of the oil slinger is stepped, and there is a group of oil seal teeth at each stepped surface. The radial clearance between the oil seal teeth and the inner hole of the inner gland is 0.4 - 0.45 mm, forming a labyrinth seal to ensure that lubricating oil does not enter the internal part of the unit and ensure the effectiveness of the seal;
[0034] Referring to Figure 2 , a plurality of uniformly distributed oil slinging grooves 3-1 and three uniformly distributed oil return grooves 3-2 are formed on the end face of the oil slinging ring. The oil slinging grooves are arc surface grooves with an R16 radius, and the oil return grooves are straight grooves with a width of 13 mm. The provision of two types of grooves can ensure the reliability and accuracy of oil slinging. There are 30 uniformly distributed R16 arc surface grooves on the end face of the oil slinging ring, ensuring that the lubricating oil flies out along the arc grooves under the action of centrifugal force and directly enters the third chamber. There are also three uniformly distributed straight grooves with a width of 13 mm on the end face of the oil slinging ring. The lubricating oil that is not slung away can enter these straight grooves and finally 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.