Oil return system of steam turbine generator
By improving the turbine generator oil return system, the exciter oil return branch pipe was changed to an independent main pipe, and sight glasses and temperature measuring points were added, which solved the problem of obstructed exciter oil return, achieved smooth oil return and temperature control, and ensured the stable operation of the generator set.
Patent Information
- Application Number
- CN202520018979.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-06
AI Technical Summary
Obstructed oil return and stagnation in the exciter lead to excessively high exciter bearing temperature and oil leakage from the bearing housing, affecting the normal operation of the turbine generator set.
The exciter return oil branch pipe was changed to an independent return oil main pipe, and separated from the turbine and generator return oil branch pipes. The return oil sight glass and temperature measurement point were added, and the structure of the return oil system was optimized to ensure smooth operation.
It effectively avoids oil stagnation in the exciter, reduces bearing temperature, prevents oil leakage, improves inspection visibility, and ensures normal operation of the generator set.
Smart Images
Figure CN223707736U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a steam turbine generator field, especially relates to a steam turbine generator oil return system. BACKGROUND
[0002] The steam turbine generator lubricating system mainly lubricates and cools the turbine oil in the oil tank by entering the turbine, generator and exciter bearing parts through the oil pressure pipeline from the oil injector, and the lubricated oil returns to the oil tank through the oil return main pipe for circulating lubrication.
[0003] The exciter oil return branch pipe is at the end of the steam turbine unit, and is finally connected in parallel with the steam turbine and generator oil return branch pipes to an oil return main pipe, the exciter oil return at the end is collected with the steam turbine and generator oil return at the front end through the oil return main pipe and then returns to the oil tank, the exciter oil return at the end is blocked and accumulated, the flow is not smooth, the temperature of the exciter bearing is too high, and the oil in the exciter bearing box leaks due to the blocked oil return, which affects the normal operation of the steam turbine generator unit. The generator and exciter oil return branch pipes do not have oil return mirrors, and the oil return smoothness cannot be observed on site. SUMMARY
[0004] The utility model discloses a steam turbine generator oil return system for reducing the turning radius of a ship, to solve the technical problem that the exciter oil return is blocked and accumulated, the flow is not smooth, the temperature of the exciter bearing is too high, and the oil in the exciter bearing box leaks due to the blocked oil return, which affects the normal operation of the steam turbine generator unit.
[0005] To solve the above technical problem, the utility model provides the following technical scheme: a steam turbine generator oil return system, comprising:
[0006] A steam turbine assembly, comprising:
[0007] An exciter is arranged at the end of the steam turbine unit, and the output end is connected to the generator;
[0008] A generator is arranged between the exciter and the steam turbine, the input end is connected to the exciter, and the output end is connected to the steam turbine;
[0009] A steam turbine is connected to the generator at the input end;
[0010] A bearing bush is arranged on the support bearing at each end of the steam turbine assembly;
[0011] An oil return main pipe is connected to the oil tank at one end, and a plurality of steam turbine oil return branch pipes are connected to the bearing bush in parallel on the pipe;
[0012] The oil return main pipe has two roots, comprising:
[0013] The first oil return main pipe is connected with the oil tank at one end and is closed at the other end and is arranged upwardly and obliquely, and two generator oil return branch pipes and the first steam turbine oil return branch pipe are connected in parallel on the pipe;
[0014] The second oil return main pipe is connected with the oil tank at one end and is closed at the other end and is arranged upwardly and obliquely, and two exciter oil return branch pipes are connected in parallel on the pipe.
[0015] The lubricating oil flows into the oil tank along the oblique oil return main pipe under the action of gravity.
[0016] Further, the second steam turbine oil return branch pipe is connected with the oil tank.
[0017] Further, the steam turbine oil return branch pipe is provided with an oil return sight glass.
[0018] Further, the steam turbine oil return branch pipe is provided with a temperature measuring point.
[0019] Further, the generator oil return branch pipe is connected with a reducing pipe, and the pipe diameter of the generator oil return branch pipe connected with the first oil return main pipe is larger than the pipe diameter of the generator oil return branch pipe connected with the two bearing bushings of the generator.
[0020] Further, the oil return main pipe is connected with the reserved flange opening of the oil tank through a sealing gasket and is fastened by bolts,
[0021] Further, the oil return main pipe is pickled and passivated.
[0022] Compared with the prior art, the utility model has the beneficial effects that,
[0023] First, the steam turbine generator and the exciter originally in one oil return main pipe are changed into two oil return main pipes, that is, the steam turbine and the generator oil return branch pipes are changed into one oil return main pipe to the oil tank, and the exciter oil return branch pipe is changed into another newly added oil return pipe to the oil tank, so that the steam turbine and the generator are effectively prevented from causing the exciter oil return to be blocked due to the oil return quantity competition in one main pipe, and the bearing temperature is high and the bearing box leaks oil.
[0024] Second, the height of the newly added oil return main pipe is connected with the oil tank at one end, which is lower than the other end, so that the oil return quantity can be quickly and smoothly returned to the oil tank.
[0025] Third, the oil return sight glass and the temperature measuring point are added, which effectively improve the intuitive visibility of the site inspection personnel on whether the oil return quantity is smooth. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 The utility model discloses a structure schematic view.
[0027] Wherein, 1 turbine oil return branch pipe, 2 generator oil return branch pipe, 3 exciter oil return branch pipe, 4 exciter, 5 generator, 6 turbine, 7 oil tank, 8 first oil return branch pipe, 9 second oil return branch pipe, 4-1 exciter bearing, 5-1 generator bearing, 6-1 turbine bearing. Specific embodiments
[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0029] As Figure 1 shown, a turbine generator oil return system, comprising:
[0030] Turbine assembly, comprising: exciter 4, arranged at the end of the turbine unit, the output end is connected to the generator 5; Generator 5, arranged between the exciter 4 and the turbine 6, the input end is connected to the exciter 4, the output end is connected to the turbine 6; Turbine 6, the input end is connected with the generator 5; Bearing, arranged on the support bearing at both ends of the turbine assembly respectively; Oil return main pipe, one end connected to the oil tank 7, and a plurality of turbine oil return branch pipes are connected to the bearing on the pipe in parallel;
[0031] The oil return main pipe comprises: the first oil return main pipe 8, the pipe diameter is F219*6, one end is connected to the oil tank 7, the other end is closed, and two generator oil return branch pipes 2 and turbine oil return branch pipes 1 are connected on the pipe in parallel; The second oil return main pipe 9, the pipe diameter is F219*6, one end is connected to the oil tank 7, the other end is closed, and two exciter oil return branch pipes 3 are connected on the pipe in parallel.
[0032] The length of the second oil return main pipe 9 is 19000mm, and the one end connected to the oil tank 7 is lower than the other end by 166mm, forming a 5° angle with the horizontal plane.
[0033] The turbine oil return branch pipe is provided with an oil return sight glass 10. The turbine oil return branch pipe is provided with a temperature measuring point.
[0034] The generator oil return branch pipe 2 is connected to the reducer 11, the pipe diameter of the generator oil return branch pipe 2 connected to the first oil return main pipe 8 is F133*4, which is larger than the pipe diameter F108*4 of the generator oil return branch pipe 2 connected to the two bearing of the generator.
[0035] The oil return main pipe and the reserved flange opening of the oil tank (7) are connected through a sealing gasket and fastened with bolts, and the oil return main pipe is pickled and passivated.
Claims
1. A steam turbine generator oil return system, comprising: a steam turbine assembly, comprising: an exciter (4) arranged at the end of the steam turbine assembly, the output end of which is connected to a generator (5); the generator (5) arranged between the exciter (4) and a steam turbine (6), the input end of which is connected to the exciter (4) and the output end of which is connected to the steam turbine (6); the steam turbine (6) connected to the generator (5) at the input end; a bearing bush arranged on the support bearing at each end of the steam turbine assembly; an oil return main pipe, one end of which is connected to an oil tank (7), and a plurality of steam turbine oil return branch pipes are connected to the bearing bushes in parallel on the pipe; characterized in that the oil return main pipe has two, comprising: a first oil return main pipe (8), one end of which is connected to the oil tank (7), the other end of which is closed and arranged upwardly inclined, and two generator oil return branch pipes (2) and a first steam turbine oil return branch pipe (1-1) are connected in parallel on the pipe; a second oil return main pipe (9), one end of which is connected to the oil tank (7), the other end of which is closed and arranged upwardly inclined, and two exciter oil return branch pipes (3) are connected in parallel on the pipe.
2. A turbine generator oil return system as set forth in claim 1, wherein The lubricating oil flows into the oil tank (7) along the inclined oil return main pipe under the action of gravity.
3. A turbine generator oil return system as set forth in claim 1, wherein The second steam turbine oil return branch pipe (1-2) is connected to the oil tank (7).
4. A turbine generator oil return system as set forth in claim 1, wherein The steam turbine oil return branch pipe is provided with an oil return sight glass (10).
5. A turbine generator oil return system as set forth in claim 1, wherein, The steam turbine oil return branch pipe is provided with a temperature measuring point.
6. A turbine generator oil return system as set forth in claim 1, wherein, The generator oil return branch pipe (2) is connected to a reducer (11), and the pipe diameter of the generator oil return branch pipe (2) connected to the first oil return main pipe (8) is larger than that of the generator oil return branch pipe (2) connected to the two bearing bushes of the generator.
7. A turbine generator oil return system as set forth in claim 1, wherein, The reserved flange opening of the oil return main pipe and the oil tank (7) is connected through a sealing gasket and fastened with bolts.
8. A turbine generator oil return system as set forth in claim 1, characterized by, The oil return main pipe is pickled and passivated.