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CN-122014753-A - Tilting pad bearing and heat dissipation method thereof

CN122014753ACN 122014753 ACN122014753 ACN 122014753ACN-122014753-A

Abstract

The present invention relates to the field of bearings and discloses a tilting pad bearing and a heat dissipation method thereof, comprising a bearing seat and a pad block. The bearing seat is a semi-circular structure with two openings facing each other. The inner wall of the bearing seat is uniformly rotated along the circumference and is provided with multiple swing pads. The end of the pad block swings outward to compress lubricating oil into the inner side of the pad block. Both ends of the pad block are provided with oil passages that run through the inner and outer sides of the pad block. The outer opening of the oil passage is smaller than the inner opening, and the inner side of the oil passage is provided with a screw plug. The oil passage is provided with a steel ball, and the diameter of the steel ball is larger than the end opening of the screw plug. The end of the screw plug is provided with multiple oil ports, and the end of the screw plug far away from the steel ball is provided with an end groove The steel ball slides axially in the oil passage. The present invention achieves the function of one-way flow of lubricating oil by setting steel balls in the oil passage and utilizing the pressure difference between the lubricating oil on the inner and outer sides of the tile to achieve automatic rolling of the steel balls, ensuring continuous supply of lubricating oil and preventing reverse leakage.

Inventors

  • GUO FUGUI
  • ZHOU WENFENG
  • CAI YUPING
  • YAN ZHUMING
  • HE SICONG
  • CHEN ZHOUYAN
  • CHEN GUIYANG
  • TANG WENJIE
  • ZHAO YUANMAN

Assignees

  • 浙江彰贵轴承科技有限公司

Dates

Publication Date
20260512
Application Date
20260408

Claims (10)

  1. 1. The tilting pad bearing is characterized by comprising a bearing seat (1) and pad blocks (2), wherein the bearing seat (1) is of a semicircular ring structure with two opposite openings, a plurality of pad blocks (2) capable of swinging are uniformly arranged on the inner wall of the bearing seat (1) in a rotating manner along the circumferential direction, and the end parts of the pad blocks (2) swing outwards to press lubricating oil to be immersed into the inner side surfaces of the pad blocks (2); the oil-saving type oil-saving device is characterized in that oil channels (201) penetrating through the inner side and the outer side of the tile (2) are formed in two ends of the tile (2), the outer side opening of the oil channels (201) is smaller than the inner side opening, screw plugs (206) are arranged on the inner side of the oil channels (201), steel balls (207) are arranged in the oil channels (201), the diameter of each steel ball (207) is larger than the opening of the end of each screw plug (206), a plurality of oil ports (206 b) are formed in the end of each screw plug (206), an end groove (206 a) is formed in one end, far away from each steel ball (207), of each screw plug (206), the diameter of each steel ball (207) is larger than the outer side opening diameter of the oil channels (201), and each steel ball (207) axially slides in the oil channels (201) and rolls to control on-off of the oil channels (201) under the pressure difference of lubricating oil on the inner side and the outer side of the tile (2).
  2. 2. The tilting pad bearing according to claim 1, wherein the inner side of the pad (2) is provided with a diversion trench (201 a) communicated with the openings at the inner sides of the two oil channels (201), and the lubricating oil enters the diversion trench (201 a) through the oil channels (201) and flows to the inner side surface of the pad (2).
  3. 3. The tilting pad bearing according to claim 1, wherein the inner wall of the end part of the oil duct (201) close to the inner side of the pad (2) is provided with an external thread (201 b), the outer wall of the screw plug (206) is provided with an internal thread (206 c) matched with the external thread (201 b), and the diameter of the steel ball (207) is smaller than the diameter of the inner end part of the oil duct (201).
  4. 4. The tilting pad bearing according to claim 1, wherein a plurality of clamping blocks (205) are fixed on two sides of the outer side surface of the pad (2), the clamping blocks (205) are symmetrically distributed, a plurality of clamping grooves (105) which are distributed corresponding to the clamping blocks (205) are formed in the inner wall of the bearing seat (1), clamping pads (105 a) are fixed on the inner wall of the clamping grooves (105), and the side wall of the clamping grooves (105) is an inclined surface tilting to the middle part of the pad (2).
  5. 5. The tilting pad bearing according to claim 4, wherein a plurality of oil guide grooves (204) are formed in the outer side face of the pad (2), the end portions of the oil guide grooves (204) are arranged in the middle of the pad (2), the other ends of the oil guide grooves (204) are communicated with the outer ports of the oil ducts (201), a plurality of pressing grooves (203) are formed in the two ends of the outer side face of the pad (2), and the pressing grooves (203) are gradually reduced from inside to outside.
  6. 6. The tilting pad bearing according to claim 1, wherein the bottom wall of the bearing seat (1) is provided with a shaft hole (102), the middle part of the pad (2) is penetrated with a rotating shaft (202), the tops of the two bearing seats (1) are provided with the same end cover (4), the middle part of the end cover (4) is provided with a buckling groove (404) corresponding to the shaft hole (102), the rotating shaft (202) is rotationally inserted between the shaft hole (102) and the buckling groove (404), the middle part of the end cover (4) is in threaded connection with a plurality of studs (401) which are distributed in a staggered manner with the buckling groove (404), and the end parts of the studs (401) are in threaded connection with the top of the bearing seat (1).
  7. 7. The tilting pad bearing according to claim 6, wherein a plurality of positioning grooves (101) which are distributed with the pad blocks (2) in a staggered mode are formed in the side wall of the bearing seat (1), positioning blocks (3) are inserted in the positioning grooves (101), telescopic ports (301) are formed in the end portions of the positioning blocks (3) in a penetrating mode, telescopic cylinders (302) with two open ends are fixedly arranged in the middle of the telescopic ports (301), positioning pins (303) are slidably arranged at the two ends of the telescopic cylinders (302), springs (304) with two ends respectively propped against the positioning pins (303) and the inner walls of the telescopic cylinders (302) are arranged in the middle of the telescopic cylinders (302), through grooves (104) corresponding to the positioning pins (303) are formed in the bottom of the bearing seat (1), through holes (402) corresponding to the through grooves (104) are formed in the middle of the end cover (4), a butt joint table (403) corresponding to the through holes (402) is fixedly arranged at the bottom of the end cover (4), and the middle of the butt joint table (403) is correspondingly provided with the positioning pins (303).
  8. 8. The tilting pad bearing according to claim 7, wherein a bump (305) is fixed at the end of the positioning block (3) far away from the bearing seat (1), and the width of the bump (305) is larger than that of the positioning groove (101).
  9. 9. The tilting pad bearing according to claim 1, wherein the outer circumference of the bearing seat (1) is provided with a plurality of connecting grooves (103), the connecting grooves (103) of the two bearing seats (1) correspond to each other, and the middle part of the connecting grooves is provided with a screw (103 a).
  10. 10. A method of dissipating heat from a tilting pad bearing according to any of claims 1-9, comprising the steps of: a. The bearing block is characterized in that the shaft body is arranged in a cavity formed by buckling two semicircular bearing blocks (1) and supported between inner side surfaces of a plurality of circumferentially distributed tiles (2), lubricating oil is driven to flow in gaps when the shaft body rotates, oil film pressure is generated on the tiles (2), when the shaft body is deviated and the tiles (2) are extruded to enable the lubricating oil pressure in an outer side area to be larger than the pressure of an inner side working surface of the tiles, steel balls (207) in the oil duct (201) are pushed to move inwards and are separated from an outer side opening of the oil duct (201) by the outer side pressure of the oil duct (201), external lubricating oil continuously flows into the inner side of the oil duct (201) through a plurality of oil ports (206 b) at the ends of the steel balls (207) and a screw plug (206), and the lubricating oil flowing into the inner side of the oil duct (201) is diffused and flows through guide grooves (201 a) formed in the inner side of the tiles (2) between adjacent oil ducts (201) and on the working surface of the whole tiles (2), so that a friction area covering the inner side surfaces of the tiles (2) and the shaft body is formed; b. after friction heat is carried away by the lubricating oil flowing through the working surface of the tile (2), the oil film pressure is increased, and when the lubricating oil pressure of the working surface on the inner side of the tile (2) is larger than the lubricating oil pressure on the outer side of the working surface, the high-pressure lubricating oil reversely pushes the steel ball (207) in the oil duct (201) to move outwards, so that the steel ball (207) tightly seals the opening on the outer side of the oil duct (201), and the lubricating oil is prevented from reversely leaking through the oil duct (201); c. in the continuous rotation of the shaft body and the swinging process of the shoe (2), through the cooperation of the clamping blocks (205) and the inclined planes in the clamping grooves (105), partial lubricating oil in the bearing seat (1) is guided to the middle area of the shoe (2) along the inclined planes, the aggregation amount of the lubricating oil on the outer side surface of the shoe (2) is improved, meanwhile, the lubricating oil is guided to the middle of the shoe (2) from the outer port of the oil duct (201) by the oil guiding groove (204) on the outer side surface of the shoe (2), and the lubricating oil flowing to the two sides of the shoe (2) is converged and pressurized through the structure form of reducing the inner opening to the outer opening of the matching pressing groove (203), so that the lubricating oil is promoted to flow to the center of the working area.

Description

Tilting pad bearing and heat dissipation method thereof Technical Field The invention relates to the field of bearings, in particular to a tilting pad bearing and a heat dissipation method thereof. Background Tilting pad bearings are widely used in rotating machinery such as steam turbines and compressors because of their advantages of good stability, strong bearing capacity, and excellent vibration resistance. Tilting pad bearings typically include a bearing housing and a plurality of pads that oscillate about a pivot point, and in operation, rotation of the shaft brings lubricating oil into the gap between the pads and the shaft to form an oil film that pressure supports the shaft through the oil film. In the prior art, in order to improve the lubrication and heat dissipation performance of a bearing, an oil duct or an oil groove is usually formed on a shoe. For example, chinese patent publication No. CN119412441B discloses a novel high-resistant Wen Xiaokong tilting-pad bearing, which is designed mainly for gas lubrication, in which a pad is provided with a cylindrical threaded hole as a gas supply flow channel, and the threaded hole ends are sealed by winding a raw material tape with a screw plug through connection of pneumatic connectors on the back of the pad. However, the above prior art flow path designs serve primarily for gases, lacking pressure control for liquid lube oil characteristics. Specifically, when the structure is applied to the tilting pad bearing with liquid lubrication, when the pressure of a lubricating oil film on the working surface on the inner side of the pad is increased and is higher than the internal pressure of the runner in the rotation process of the shaft body, the lubricating oil is easy to reversely leak through the runner, so that the pressure of the oil film is difficult to maintain, and the lubrication reliability is reduced. Meanwhile, the on-off of the runner cannot be regulated according to the pressure difference of lubricating oil at the inner side and the outer side of the tile, the runner is difficult to be automatically opened for quick oil supplement when the pressure at the outer side of the tile is increased, the runner cannot be automatically closed for preventing high-pressure oil loss when the pressure at the inner side is increased, the utilization rate of the lubricating oil is low, and the running stability of the bearing under the working conditions of high load and the like is influenced. Disclosure of Invention The invention aims to solve the problems and provide a tilting pad bearing and a heat dissipation method thereof, wherein a unidirectional opening and closing oil duct structure driven by a lubricating oil pressure difference is constructed in a pad of the tilting pad bearing, and an axially movable plugging element is arranged in an oil duct to enable the oil duct to be automatically opened or closed under different pressure states, so that self-adaptive supply and reverse blocking of lubricating oil are realized to maintain stable oil film pressure of a working surface of the pad, and the invention is described in detail below. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides a tilting pad bearing, which comprises a bearing seat and pads, wherein the bearing seat is of a semicircular structure with two opposite openings, a plurality of pads capable of swinging are uniformly arranged on the inner wall of the bearing seat in a rotating manner along the circumferential direction, and the ends of the pads swing outwards to press lubricating oil to be immersed into the inner side surfaces of the pads; The shoe comprises a shoe body, wherein a plurality of oil ports are formed in the end of the screw plug, an end groove is formed in one end of the screw plug, far away from the steel ball, of the screw plug, the diameter of the steel ball is larger than the diameter of the opening outside the oil duct, the steel ball axially slides in the oil duct, and the on-off of the oil duct is controlled by rolling under the pressure difference of lubricating oil on the inner side and the outer side of the shoe body. Preferably, the inner side of the tile is provided with a diversion trench communicated with the openings at the inner sides of the two oil channels, and the lubricating oil enters the diversion trench through the oil channels and flows to the inner side surface of the tile. Preferably, the inner wall of the end part of the oil duct, which is close to the inner side of the shoe, is provided with an external thread, the outer wall of the screw plug is provided with an internal thread which is matched with the external thread, and the diameter of the steel ball is smaller than the diameter of the inner end part of the oil duct. Preferably, a plurality of clamping blocks are fixed on two sides of the outer side surface of the tile, the clamping blocks are symmetrically