CN213838693U

CN213838693U - Oil leakage prevention steam turbine bearing seat structure

Info

Publication number: CN213838693U
Application number: CN202022623726.4U
Authority: CN
Inventors: 许浩明; 金吉; 顾洪良
Original assignee: Shanghai Shidongkou First Power Plant of Huaneng Power International Inc
Current assignee: Shanghai Shidongkou First Power Plant of Huaneng Power International Inc
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-07-30
Anticipated expiration: 2030-11-13

Abstract

The utility model relates to a steam turbine bearing frame structure of leak protection oil, including the main tank and respectively through returning a plurality of bearing frames that oil pipe and main tank are connected, this bearing frame structure still includes main oil mist separator, vice oil mist separator and exhaust steam pipe, main oil mist separator install on the main tank, vice oil mist separator install on the bearing frame, main oil mist separator and vice oil mist separator's exit respectively with exhaust steam pipe connection, exhaust steam pipe lead to outdoor, compare with prior art, the utility model has the advantages of safe and reliable.

Description

Oil leakage prevention steam turbine bearing seat structure

Technical Field

The utility model relates to a steam turbine especially relates to a steam turbine bearing frame structure of leak protection oil.

Background

The steam turbine is also called as a steam turbine engine, and is a rotary steam power device.A high-temperature high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto blades, so that a rotor provided with blade rows rotates, and simultaneously, the rotor does work outwards.

The steam turbine set is provided with bearing seats for supporting bearings of a steam turbine, the traditional steam turbine is provided with 5 bearing seats, each bearing seat is provided with an oil return pipe, and each oil return pipe returns to the main oil tank. In normal operation, the lower part in the oil return pipe is lubricating oil, the upper part of the oil return pipe is an oil-gas mixture, in order to prevent the lubricating oil in the bearing seat from leaking outwards, a pipeline and the bearing seat need to be kept at a tiny negative pressure, and the existence of the negative pressure has practical significance for the oil tank. Because the return oil at each bearing of the steam turbine is non-pressure return oil, the lubricating oil smoothly returns to the main oil tank by the inclination angle of the oil pipe and the negative pressure (lower than the atmospheric pressure) of the oil tank. In the operation process of the steam turbine, an oil return pipe of a certain bearing seat can be fully arranged, micro negative pressure in the bearing seat cannot be kept, the phenomenon that a large amount of oil smoke is emitted to the bearing seat is caused, and great fire safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an oil leakage prevention steam turbine bearing frame structure for overcoming the defect that above-mentioned prior art exists and reducing conflagration potential safety hazard.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a turbine bearing frame structure of leak protection oil, includes the main oil tank and respectively through returning a plurality of bearing frames that oil pipe and main oil tank are connected, this bearing frame structure still includes main oil mist separator, vice oil mist separator and exhaust steam pipe, main oil mist separator install on the main oil tank, vice oil mist separator install on the bearing frame, main oil mist separator and vice oil mist separator's exit respectively with exhaust steam pipe connection, exhaust steam pipe lead to outdoor.

Furthermore, the auxiliary oil mist separator is arranged on the air holes of the bearing seat.

Furthermore, the lower part in the oil return pipe is lubricating oil, the upper part is an oil-gas mixture, and the oil return pipe corresponds to the bearing seat one by one and is respectively used for returning the lubricating oil at each bearing seat to the main oil tank.

Further preferably, the secondary oil mist separator is mounted on a bearing seat which is full of oil corresponding to the oil return pipe.

Furthermore, the bearing blocks comprise five bearing blocks which are a first bearing block, a second bearing block, a third bearing block, a fourth bearing block and a fifth bearing block from the main oil tank to the outside in sequence.

Further preferably, the secondary oil mist separator is mounted on the third bearing housing.

Further preferably, the secondary oil mist separator is provided with one or more than one secondary oil mist separator, and the secondary oil mist separator is respectively arranged on one or more than one bearing seat.

Still further preferably, the primary oil mist separator and the secondary oil mist separator are CRZ-02 oil mist separators, respectively.

Still further preferably, the pipe diameter of the steam exhaust pipeline is 108 mm.

Further preferably, the auxiliary oil mist separator is fixedly installed on the air vent of the bearing seat through a bolt.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses an installation main oil mist separator takes out the oil-gas mixture on upper portion in the pipeline on the main oil tank, make and keep minimum negative pressure in pipeline and the bearing frame, thereby reach the effect that prevents the interior lubricating oil of bearing frame and leak outward, install vice oil mist separator and directly take out the oil-gas mixture on upper portion in the oil return pipe in bearing frame department simultaneously, prevent to manage for full at the oil return pipe of certain bearing frame and can't keep the interior little negative pressure of bearing frame, and lead to the condition emergence that the bearing frame emits a large amount of oil smoke, effectively reduce conflagration potential safety hazard.

Meanwhile, when the lubricating oil runs in the unit, smoke caused by friction and high temperature can be discharged through the oil mist separator, and noncondensable gas (mostly water vapor) and oil smoke in the oil tank are pumped out, so that oil return of the oil way is smooth, and oil quality deterioration can be prevented.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein: 1. the oil-gas separator comprises a main oil tank, 2, an oil return pipe, 3, a bearing seat, 4, a main oil mist separator, 5, an auxiliary oil mist separator, 6 and a steam exhaust pipeline.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1, the utility model provides a turbine bearing frame structure of leak protection oil, including main oil mist separator 4, vice oil mist separator 5, exhaust steam pipe 6, main oil tank 1 and a plurality of bearing frames 3 of being connected with main oil tank 1 through returning oil pipe 2 respectively, it is lubricating oil to return oil pipe 2 interior lower part, upper portion is oil-gas mixture, return oil pipe 2 and bearing frame 3 one-to-one, be used for respectively with the lubricating oil backward flow of each bearing frame 3 department to main oil tank 1, bearing frame 3 includes five, outwards be first bearing frame in proper order by main oil tank 1, the second bearing frame, the third bearing frame, fourth bearing frame and fifth bearing frame.

The main oil mist separator 4 is installed on the main oil tank 1, the auxiliary oil mist separator 5 is fixedly installed on an air hole of the bearing seat 3 through a bolt, outlets of the main oil mist separator 4 and the auxiliary oil mist separator 5 are respectively connected with the steam exhaust pipeline 6, and the steam exhaust pipeline 6 is communicated with the outside.

Wherein, the main oil mist separator 4 and the auxiliary oil mist separator 5 respectively adopt a CRZ-02 oil mist separator, and the pipe diameter of the steam exhaust pipeline 6 is 108 mm.

In this embodiment, the auxiliary oil mist separator 5 is installed on the bearing seat 3 corresponding to the oil return pipe 2 and full of the oil return pipe 2, and the auxiliary oil mist separator 5 is installed on the bearing seat 3 full of the oil return pipe 2, so that the original positive pressure in the bearing seat is changed into a micro-negative pressure, thereby avoiding the outward oil leakage of the bearing seat, avoiding the fire hazard of the turbine unit, ensuring the safe operation of the turbine unit most effectively, and effectively improving the oil return in the bearing seat 3.

Example 2

In this embodiment, the secondary oil mist separator 5 is mounted on the third bearing seat, and the rest of the components are the same as those in embodiment 1, the third bearing seat is the middle bearing seat, and the situation that the oil return pipe 2 is full and cannot maintain negative pressure occurs relatively easily, so when the oil return pipes 2 of all the bearing seats 3 are not full, the secondary oil mist separator 5 can be mounted on the third bearing seat, and the situation that the bearing seats 3 leak oil outwards because the bearing seats cannot maintain negative pressure is effectively prevented.

Example 3

In this embodiment, one or more secondary oil mist separators 5 may be provided, and may be optionally provided on one or more of the five bearing blocks 3, and the rest of the steps are the same as those in embodiment 1, and the installation of the secondary oil mist separator 5 on any one or more of the bearing blocks 3 can prevent or prevent the occurrence of an oil leakage to the outside due to the inability of maintaining negative pressure in the bearing block 3 to a certain extent.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a turbine bearing frame structure of leak protection oil, includes main oil tank (1) and a plurality of bearing frame (3) of being connected with main oil tank (1) through returning oil pipe (2) respectively, its characterized in that, this bearing frame structure still includes main oil mist separator (4), vice oil mist separator (5) and exhaust steam pipe way (6), main oil mist separator (4) install on main oil tank (1), vice oil mist separator (5) install on bearing frame (3), the exit of main oil mist separator (4) and vice oil mist separator (5) be connected with exhaust steam pipe way (6) respectively, exhaust steam pipe way (6) lead to outdoor.

2. An oil leakage preventing bearing housing structure of a steam turbine as claimed in claim 1, wherein the secondary oil mist separator (5) is installed on the air hole of the bearing housing (3).

3. The bearing seat structure of the steam turbine for preventing oil leakage according to claim 2, wherein the oil return pipe (2) has a lower portion filled with lubricating oil and an upper portion filled with an oil-gas mixture, and the oil return pipe (2) corresponds to the bearing seats (3) one by one and is respectively used for returning the lubricating oil at each bearing seat (3) to the main oil tank (1).

4. An oil leakage preventing bearing housing structure for a steam turbine according to claim 3, wherein the secondary oil mist separator (5) is installed on the bearing housing (3) corresponding to the oil return pipe (2) which is full of oil.

5. An oil leakage prevention bearing seat structure of a steam turbine according to claim 1, wherein the number of the bearing seats (3) is five, and the first bearing seat, the second bearing seat, the third bearing seat, the fourth bearing seat and the fifth bearing seat are arranged from the main oil tank (1) to the outside in sequence.

6. An oil leakage preventing bearing housing structure for a steam turbine according to claim 5, wherein said secondary oil mist separator (5) is installed on a third bearing housing.

7. An oil leakage preventing bearing housing structure of a steam turbine according to claim 2, wherein one or more oil mist separators (5) are provided on one or more bearing housings (3), respectively.

8. An oil leakage preventing bearing housing structure for a steam turbine according to claim 4, 6 or 7, wherein said primary oil mist separator (4) and said secondary oil mist separator (5) are CRZ-02 oil mist separators, respectively.

9. An oil leakage preventing bearing housing structure of a steam turbine as claimed in claim 4, 6 or 7, characterized in that the diameter of the exhaust pipe (6) is 108 mm.

10. An oil leakage preventing bearing seat structure of a steam turbine according to claim 2, wherein the secondary oil mist separator (5) is fixedly installed on the air hole of the bearing seat (3) by bolts.