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CN-121976862-A - Turbine lubricating structure and turbine

CN121976862ACN 121976862 ACN121976862 ACN 121976862ACN-121976862-A

Abstract

The invention provides a turbine lubricating structure and a turbine, and relates to the technical field of turbines. The lubricating structure of the steam turbine comprises a static part, a rotating part and a lubricating mechanism, wherein the static part comprises a positioning pipe, the rotating part comprises a main shaft, the main shaft is connected with the positioning pipe through a bearing assembly of the lubricating mechanism, the bearing assembly comprises a bearing outer ring, a bearing inner ring, balls and a magnetic force stop block, the bearing inner ring is sleeved on the main shaft, the bearing outer ring is fixed in the positioning pipe, the balls are arranged between the bearing inner ring and the bearing outer ring, the magnetic force stop block is fixed on the surface of the bearing inner ring at intervals to separate the balls, and the lubricating mechanism further comprises a storage cone, a temporary storage pipe, a sealing piston and a magnetic force piston block. According to the invention, the whole process automation of turbine lubrication is realized through a magnetic drive piston linkage mechanism, the whole scheme is adapted to severe scenes such as power generation, ships and the like without modifying a main body structure, and the problems of energy consumption, service life and operation and maintenance are comprehensively solved.

Inventors

  • HAN HONGSHENG
  • SU YANLI
  • GAO ZHANGUO
  • WANG JIAN
  • LEI JIANBO

Assignees

  • 河北瑞兆激光再制造技术股份有限公司

Dates

Publication Date
20260505
Application Date
20260303

Claims (7)

  1. 1. The utility model provides a steam turbine lubricating structure which characterized in that includes stationary part (1), rotation part (2) and lubricated mechanism (3), wherein: The stationary part (1) comprises a positioning tube (101); the rotating part (2) comprises a main shaft (201); The main shaft (201) is connected with the positioning tube (101) through a bearing assembly of the lubricating mechanism (3), the bearing assembly comprises a bearing outer ring (305), a bearing inner ring (306), balls (307) and a magnetic stop block (308), wherein the bearing inner ring (306) is sleeved on the main shaft (201), the bearing outer ring (305) is fixed in the positioning tube (101), the balls (307) are arranged between the bearing inner ring (306) and the bearing outer ring (305), and the magnetic stop block (308) is fixed on the surface of the bearing inner ring (306) at intervals to separate the balls; The lubricating mechanism (3) further comprises a storage cone (301), a temporary storage pipe (302), a sealing piston (310) and a magnetic piston block (311); The temporary storage tube (302) is connected with an internal threaded hole (309) at the top of the bearing outer ring (305) through an external thread (304), and the lower end of the temporary storage tube is provided with a filtering hole group (316) which is communicated with the inside of the bearing outer ring (305); the storage cone bucket (301) is arranged at the upper end of the temporary storage pipe (302), and a first check valve pipe (303) which only allows oil to flow to the temporary storage pipe (302) is arranged between the storage cone bucket and the temporary storage pipe; The sealing piston (310) is movably sleeved in the temporary storage pipe (302), and a second one-way valve pipe (315) which only allows oil to flow to the lower cavity of the temporary storage pipe (302) is arranged on the surface of the sealing piston; The magnetic piston block (311) is fixed below the sealing piston (310) and magnetically attracts the magnetic stop block (308), and the magnetic piston block (311) is connected with the inner wall of the temporary storage tube (302) through a spring telescopic rod (313); When the main shaft (201) rotates, the magnetic force stop block (308) periodically attracts the magnetic force piston block (311) to move downwards, the sealing piston (310) is driven to compress the upper cavity of the temporary storage tube (302) so that lubricating oil flows into the bearing outer ring (305) through the second check valve tube (315) and the filtering hole group (316), and when the magnetic force stop block (308) moves away, the spring telescopic rod (313) pulls the sealing piston (310) to reset so that the lubricating oil in the storage cone (301) is supplemented to the upper cavity of the temporary storage tube (302) through the first check valve tube (303).
  2. 2. A turbine lubrication structure and a turbine according to claim 1, wherein the bearing outer ring (305), the bearing inner ring (306), the balls (307) and the temporary storage tube (302) are made of a non-magnetic material.
  3. 3. The lubricating structure of a steam turbine and the steam turbine according to claim 1, wherein the lower end of the temporary storage tube (302) is matched with an annular groove on the inner top surface of the bearing outer ring (305) to form a complete rollaway nest, and the filtering hole set (316) is arranged at the rollaway nest.
  4. 4. The lubricating structure of a steam turbine and the steam turbine according to claim 1, wherein the top of the storage cone (301) is provided with an openable sealing plug (317).
  5. 5. A turbine lubrication structure and turbine according to claim 1, wherein the magnetic blocks (308) are spaced apart from the non-magnetic regions in alternating magnetic regions, only the magnetic regions attracting the magnetic piston blocks (311).
  6. 6. The lubricating structure of a steam turbine and the steam turbine according to claim 1, wherein the upper end of the spring telescopic rod (313) is connected with the inner wall of the temporary storage tube (302) through a fixed block (312).
  7. 7. A steam turbine comprising a rotor system, a steam flow passage and a lubrication system, wherein the lubrication system comprises the lubrication structure of the steam turbine according to any one of claims 1 to 6.

Description

Turbine lubricating structure and turbine Technical Field The invention relates to the technical field of turbines, in particular to a turbine lubricating structure and a turbine. Background The steam turbine engine is also called a steam turbine engine, and belongs to a kind of rotary power machinery for converting the heat energy of steam into mechanical energy, and the working principle is that the high-temperature and high-pressure steam sequentially passes through a series of annularly arranged nozzles and movable vanes after entering the steam turbine, the steam expands in the nozzles to accelerate to convert the heat energy into the kinetic energy of high-speed steam flow, the high-speed steam flow impacts the movable vanes to drive the rotor to rotate so as to convert the kinetic energy into the mechanical energy, and the rotary power engine is widely applied to the fields of modern industry such as power generation, ship power, petrochemical industry and the like, and forms power generation core equipment together with a boiler and a generator in a thermal power plant. The turbine bearing part is lubricated, firstly, a large friction force is generated between the bearing and the journal when the rotor of the turbine rotates at a high speed, an oil film is formed on the surfaces of the bearing and the journal by lubrication, the friction coefficient is reduced, the consumption of friction work is reduced, the energy consumption is reduced, the efficiency of the turbine is improved, secondly, the abrasion is reduced, the oil film can avoid the direct contact between the bearing and the journal, the abrasion of the metal surface is reduced, the service life of the bearing and the journal is prolonged, thirdly, a large amount of heat is generated at the bearing due to friction in the operation process of the turbine, the heat can be taken away by lubricating oil, the heat is emitted through the circulation of a lubricating system, the bearing is ensured to work in a proper temperature range, the performance of bearing materials is prevented from being reduced or even damaged due to the overhigh temperature, fourthly, the lubricating oil can form a protective film on the bearing surface to isolate air, moisture and other corrosive substances, and the rust and corrosion on the bearing surface are prevented. The lubrication part of the turbine is mainly focused on the rotatably connected bearing part, which plays a critical role in the overall turbine operating system. The steam turbine is a rotary power machine that converts thermal energy of steam into mechanical energy, and its bearing portion is subjected to a great load and operates at a high speed. In the operation process of the steam turbine, strong friction can be generated between the bearing and the journal, if good lubrication is lacked, the friction resistance can be increased sharply, the energy consumption is greatly increased, the overall efficiency of the steam turbine is reduced, the bearing and the journal are seriously worn, the service life of the steam turbine is greatly shortened, even equipment faults can be possibly caused, and the normal operation of the whole production flow is influenced. To ensure this lubrication effect, it is necessary to add lubricating oil from time to maintain a stable oil film between the bearing and the journal, ensuring smooth operation of the apparatus. However, at present, in most cases, inspection and addition work of lubricating oil is mostly done manually. On the one hand, the time interval of manual inspection has certain limitation, and the liquid level change and the quality condition of the lubricating oil are difficult to discover in time. For example, when the steam turbine is continuously operated for a long time, the consumption rate of the lubricating oil may be increased, and if the period of manual inspection is long, the shortage of the lubricating oil may occur, and at this time, the equipment is still operated at a high speed, which may easily cause damage to the bearings due to poor lubrication. On the other hand, manual lubricating oil addition consumes manpower, increases the labor cost of enterprises, and is also easily affected by human factors. Operators can have the problems of untimely adding of lubricating oil, inaccurate adding amount and the like due to negligence, fatigue and the like, thereby influencing the lubricating effect. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a turbine lubricating structure and a turbine, and solves the problems that the prior art is difficult to timely add lubrication and consumes manpower. The lubricating structure of the steam turbine comprises a static part, a rotating part and a lubricating mechanism, wherein: the stationary portion comprises a positioning tube; The rotating part comprises a main shaft; The main shaft is connected with the positioning pipe through a bearing assembly of the lubr