Oil discharge structure and oil discharge system for generator bearing

Abstract

The invention provides a generator bearing oil discharge structure and system, and relates to the technical field of motor bearings, the generator bearing oil discharge structure comprises a bearing, the bearing sleeves a generator driving shaft, a shell protection sleeve is arranged outside the bearing, and the two sides of the bearing are detachably connected with a first outer cover and a second outer cover respectively; by means of the structure, the problems that according to a traditional generator bearing, oil discharging is difficult, waste oil is accumulated, the temperature of the generator bearing is abnormal, and normal use of a generator is affected are solved. The lubricating oil filter is arranged outside the shell protection sleeve and communicated with the first oil discharge outlet, waste oil flowing out of the first oil discharge outlet enters the lubricating oil filter through a pipeline, the lubricating oil filter conducts multiple filtering on the waste oil and discharges the waste oil, and pollution to the environment is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of motor bearings, and in particular to an oil drainage structure and an oil drainage system for a generator bearing. Background Art

[0002] Heping Wind Farm of Daqing Lvyuan Wind Power Co., Ltd. is the first domestic large-scale wind turbine with a single unit capacity of 3MW. The generator used by the unit is a domestic brand 3.0MW double-fed asynchronous generator. Since the climate characteristics of the wind farm are temperate monsoon climate, the winter lasts for a long time and the temperature is low, the problem of generator bearing oil drainage is particularly prominent, and abnormal generator bearing temperature caused by waste oil accumulation occurs from time to time.

[0003] Therefore, in view of the above situation, there is an urgent need to develop a generator bearing oil drainage structure and oil drainage system to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The present invention provides a generator bearing oil discharge structure and an oil discharge system, which are used to solve the defects in the prior art.

[0005] The present invention provides a generator bearing oil discharge structure and oil discharge system, comprising: a bearing, wherein the bearing sleeve is arranged on the generator drive shaft, a shell protection sleeve is arranged outside the bearing, a first outer cover and a second outer cover are detachably connected on both sides of the bearing, the bearing and the first outer cover and the second outer cover are detachably connected by fasteners, an oil slinging plate coaxially connected to the left end of the bearing is arranged in the first outer cover, an oil through port is arranged at one end of the first outer cover away from the oil slinging plate, a sealing ring is arranged at one side of the second outer cover in contact with the generator drive shaft, a first oil discharge channel for the bearing is arranged in the first outer cover, the first oil discharge channel comprises a barrier ring fixedly arranged on the inner wall of the first outer cover and located outside the oil slinging plate, an oil discharge gap arranged between the barrier ring and the oil slinging plate, an oil discharge chamber arranged between the inner end face of the first outer cover and the end face of the oil slinging plate close to the shaft retaining ring, and a first oil discharge port arranged at the bottom of the first outer cover, the oil through port, the first bearing, the oil discharge gap, the oil discharge chamber and the first oil discharge port are sequentially connected, and a one-way valve is arranged in the first oil discharge port.

[0006] Preferably, it further comprises a lubricating oil filter, wherein the lubricating oil filter is arranged outside the housing protective cover, and the lubricating oil filter is connected to the first oil drain port.

[0007] Preferably, the lubricating oil filter comprises a filter tank, a filter cover is provided at one end of the filter tank, an oil inlet pipe is provided on the filter cover, the oil inlet pipe is communicated with the first oil outlet, a second oil outlet is provided at the other end of the filter tank, two sliding grooves are symmetrically provided on the inner wall of the filter tank, a first filter plate is clamped on the sliding groove on the side close to the filter cover, and a fixing plate is clamped in the middle of the first filter plate

[0008] Preferably, a filter ring is provided on the fixed plate, a first filter element is provided between the filter ring and the inner wall of the filter tank, a second filter plate is clamped on the sliding groove below the first filter plate, a second filter element is provided between the first filter plate and the second filter plate, a third filter plate is clamped on the sliding groove below the second filter plate, a third filter element is provided between the second filter plate and the third filter plate, and a buffer mechanism is provided on the inner wall of the filter tank below the third filter plate.

[0009] Preferably, the buffer mechanism includes a limiting ring, which is fixedly arranged at the bottom of the third filter plate, and the limiting seat is fixedly arranged on the inner wall of the filter tank, and a limiting groove is provided in the limiting seat, and the limiting ring is inserted in the limiting groove, and the first buffer spring and the second buffer spring are respectively arranged on the outer wall and the inner wall of the limiting ring.

[0010] Preferably, it also includes:

[0011] Pressure detection module 1 is used to measure the axial load on the rolling elements in the bearing;

[0012] Pressure detection module 2 is used to measure the normal load on the rolling elements in the bearing;

[0013] A time detection module, used to measure the running time of the generator;

[0014] A rotation speed detection module, used to measure the rotation speed of the generator drive shaft;

[0015] An alarm module, used for issuing an alarm;

[0016] A calculation module 1 is used to calculate the lubrication coefficient of the lubricating oil in the bearing based on the axial load on the rolling element in the bearing;

[0017] A processing module, used for comparing the lubrication coefficient of the lubricating oil in the bearing obtained by the calculation module 1 with the rated lubrication coefficient of the lubricating oil in the bearing;

[0018] Control module, when the lubrication coefficient of the lubricating oil in the bearing is greater than the rated lubrication coefficient of the lubricating oil in the bearing, the control alarm module will sound an alarm and control the generator to stop working. When the lubrication coefficient of the lubricating oil in the bearing is less than or equal to the rated lubrication coefficient of the lubricating oil in the bearing, the generator will work normally.

[0019] Preferably, the calculation module 1 calculates based on the following formula 1:

[0020]

[0021] G is the lubrication coefficient of the lubricating oil in the bearing, is the viscosity-temperature coefficient of the lubricating oil, d1 is the diameter of the rolling element in the bearing, d2 is the diameter of the outer surface of the inner ring of the bearing, d3 is the diameter of the inner surface of the outer ring of the bearing, ε is the pour point coefficient of the lubricating oil, τ is the viscosity coefficient of the lubricating oil, E is the elastic modulus of the rolling element in the bearing, Q1 is the axial load on the rolling element in the bearing, Q2 is the normal load on the rolling element in the bearing, s is the Poisson's ratio of the rolling element in the bearing, s1 is the Poisson's ratio of the inner ring of the bearing, s2 is the Poisson's ratio of the inner and outer rings of the bearing, E1 is the elastic modulus of the inner ring of the bearing, E2 is the elastic modulus of the inner and outer rings of the bearing, t is the running time of the generator, and v is the rotation speed of the generator drive shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic diagram of the overall cross-sectional structure of a generator bearing oil drainage structure provided by an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the lubricating oil filter provided by an embodiment of the present invention.

[0025] Reference numerals:

[0026] 1. Generator shaft; 2. Bearing; 3. Casing protection sleeve; 4. First outer cover; 5. Second outer cover; 6. Oil thrower; 7. Oil port; 8. Sealing ring; 9. Blocking ring; 10. Oil drain gap; 11. Oil drain chamber; 12. First oil drain port; 13. Fixing ring; 14. One-way valve; 15. Shaft retaining ring; 16. Lubricating oil filter; 17. Filter tank; 18. Filter cover; 19. Oil inlet pipe; 20. Second oil drain port; 21. Sliding groove; 22. First filter plate; 23. Fixing plate; 24. Filter ring; 25. First filter element; 26. Second filter plate; 27. Second filter element; 28. Third filter plate; 29. ​​Third filter element; 30. Buffer mechanism; 31. Limiting ring; 32. Limiting seat; 33. Limiting groove; 34. First buffer spring; 35. Second buffer spring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The present invention provides the following embodiments

[0030] Example 1

[0031] The embodiment of the present invention provides a generator bearing oil discharge structure and oil discharge system, such as Figure 1-Figure 2 As shown, it includes: a bearing 2, the bearing 2 is sleeved on the generator drive shaft, the bearing 2 is provided with a shell protective sleeve 3, the two sides of the bearing 2 are respectively detachably connected with a first outer cover 4 and a second outer cover 5, the bearing 2 and the first outer cover 4 and the second outer cover 5 are respectively detachably connected by fasteners, the first outer cover 4 is provided with an oil slinger 6 coaxially connected to the left end of the bearing 2, the first outer cover 4 is provided with an oil through hole 7 at one end away from the oil slinger 6, the second outer cover 5 is provided with a sealing ring 8 on the side in contact with the generator drive shaft, and the first outer cover 4 is provided with a The first oil discharge channel of the bearing 2 includes a barrier ring 9 fixedly mounted on the inner wall of the first outer cover 4 and located on the outer side of the oil-slinging plate 6, an oil discharge gap 10 arranged between the barrier ring 9 and the oil-slinging plate 6, an oil discharge chamber 11 arranged between the inner end surface of the first outer cover 4 and the end surface of the oil-slinging plate 6 close to the shaft retaining ring 15, and a first oil discharge port 12 arranged at the bottom of the first outer cover 4. The oil port 7, the first bearing 2, the oil discharge gap 10, the oil discharge chamber 11 and the first oil discharge port 12 are sequentially connected, and a one-way valve 14 is arranged in the first oil discharge port 12.

[0032] The working principle and beneficial effects of the above technical solution are as follows: the bearing 2 supports and protects the generator drive shaft. The bearing 2, the housing protective sleeve 3, the first outer cover 4, the second outer cover 5 and other structures are first installed with the generator drive shaft, and then the lubricating oil is introduced into the bearing 2 through the oil port 7 for lubrication. After the lubricating oil is lubricated inside the bearing 2, it flows into the oil discharge chamber 11 through the oil discharge gap 10 from the oil-slinging plate 6, and finally flows out from the first oil discharge port 12, thus completing the lubrication and oil-slinging work of the entire structure. The one-way valve 14 in the first oil discharge port 12 prevents the outflowing waste oil from flowing back into the bearing 2. The design of this structure keeps the generator bearing 2 fully lubricated, restores the temperature of the bearing 2 to normal, enhances the waste grease discharge capacity, and solves the problem that the traditional generator bearing 2 is difficult to discharge oil, resulting in waste oil accumulation, causing abnormal temperature of the generator bearing 2, and affecting the normal use of the generator.

[0033] Example 2

[0034] On the basis of Example 1, Figure 1-Figure 2 As shown, a lubricating oil filter 16 is also included. The lubricating oil filter 16 is arranged outside the housing protective cover 3 , and the lubricating oil filter 16 is connected to the first oil drain port 12 .

[0035] The working principle and beneficial effects of the above technical solution are as follows: the waste oil flowing out from the first oil discharge port 12 enters the lubricating oil filter 16 through the pipeline, and the lubricating oil filter 16 performs multiple filtrations on the waste oil and discharges it, thereby purifying the waste oil so that it can be continued to be used by a subsequent part of the producers, thus saving resources, and collecting the waste oil to prevent pollution to the environment.

[0036] Example 3

[0037] On the basis of Example 2, Figure 1-Figure 2As shown, the lubricating oil filter 16 includes a filter tank 17, a filter cover 18 is provided at one end of the filter tank 17, an oil inlet pipe 19 is provided on the filter cover 18, the oil inlet pipe 19 is communicated with the first oil outlet 12, and a second oil outlet 20 is provided at the other end of the filter tank 17. Two sliding grooves 21 are symmetrically provided on the inner wall of the filter tank 17, and a first filter plate 22 is clamped on the sliding groove 21 on the side close to the filter cover 18, a fixing plate 23 is clamped in the middle of the first filter plate 22, and a filter ring is provided on the fixing plate 23. 24, a first filter element 25 is arranged between the filter ring 24 and the inner wall of the filter tank 17, a second filter plate 26 is clamped on the sliding groove 21 below the first filter plate 22, a second filter element 27 is arranged between the first filter plate 22 and the second filter plate 26, a third filter plate 28 is clamped on the sliding groove 21 below the second filter plate 26, a third filter element 29 is arranged between the second filter plate 26 and the third filter plate 28, and a buffer mechanism 30 is arranged on the inner wall of the filter tank 17 below the third filter plate 28.

[0038] The working principle and beneficial effects of the above technical solution are as follows: the filter tank 17 is connected to the filter cover 18 by threads, which facilitates the replacement of parts in the filter tank 17, the filter cover 18 fixes the oil inlet pipe 19, and the waste oil enters the filter tank 17 from the first oil outlet 12 through the oil inlet pipe 19 for filtration, and the two sliding grooves 21 provided on the inner wall of the filter tank 17 are clamped and limited to the first filter plate 22, the second filter plate 26, and the third filter plate 28, the first filter plate 22 is clamped to the fixing plate 23, the first filter plate 22 fixes the filter ring 24, the filter ring 24, the inner wall of the filter tank 17, and the first filter plate 22 are clamped to the first filter element 25 The second filter element 27 is fixed by the second filter plate 26 and the inner wall of the filter tank 17, the third filter plate 28 and the inner wall of the filter tank 17 are fixed by the third filter element 29, the oil inlet pipe 19 is connected with the filter ring 24, the waste oil entering from the oil inlet pipe 19 is filtered by the filter ring 24, and then enters the first filter element 25 to be filtered, and then is filtered from the first filter plate 22 and passes through the second filter element 27 to be filtered, passes through the second filter plate 26 to enter the third filter element 29 to be filtered, passes through the third filter plate 28 and is discharged from the second oil discharge port 20 below to be collected and wait for subsequent processing, and the inner wall of the filter tank 17 fixes the buffer mechanism 30.

[0039] Example 4

[0040] On the basis of Example 3, Figure 1-Figure 2As shown, the buffer mechanism 30 includes a limiting ring 31, and the limiting ring 31 is fixedly arranged at the bottom of the third filter plate 28. The limiting seat 32 is fixedly arranged on the inner wall of the filter tank 17. A limiting groove 33 is provided in the limiting seat 32. The limiting ring 31 is inserted in the limiting groove 33. The first buffer spring 34 and the second buffer spring 35 are respectively arranged on the outer wall and the inner wall of the limiting ring 31.

[0041] The working principle and beneficial effects of the above technical solution are as follows: the inner wall of the filter tank 17 fixes the limit seat 32, the third filter plate 28 fixes the limit ring 31, the limit groove 33 limits the limit ring 31, the outer wall of the limit ring 31, the bottom of the third filter plate 28, and the top of the limit seat 32 limit the first buffer spring 34, the inner wall of the limit ring 31, the bottom of the third filter plate 28, and the top of the limit seat 32 limit the second buffer spring 35, the first buffer spring 34 and the second buffer spring 35 buffer the third filter plate 28 and the top of the limit seat 32, and when the first filter plate 22, the second filter plate 26, the third filter plate 28, the first filter element 25, the second filter element 27, and the third filter element 29 are subjected to shock, the first buffer spring 34 and the second buffer spring 35 play a buffering role.

[0042] Example 5

[0043] On the basis of Example 4, the invention further comprises:

[0044] Pressure detection module 1, used to measure the axial load on the rolling element in bearing 2;

[0045] Pressure detection module 2, used to measure the normal load on the rolling element in bearing 2;

[0046] A time detection module, used to measure the running time of the generator;

[0047] A rotation speed detection module, used to measure the rotation speed of the generator drive shaft;

[0048] An alarm module, used for issuing an alarm;

[0049] Calculation module 1, used to calculate the lubrication coefficient of the lubricating oil in the bearing 2 based on the axial load on the rolling element in the bearing 2;

[0050] A processing module, used for comparing the lubrication coefficient of the lubricating oil in the bearing 2 obtained by the calculation module 1 with the rated lubrication coefficient of the lubricating oil in the bearing 2;

[0051] Control module, when the lubrication coefficient of the lubricating oil in bearing 2 is greater than the rated lubrication coefficient of the lubricating oil in bearing 2, the control alarm module sounds an alarm and controls the generator to stop working. When the lubrication coefficient of the lubricating oil in bearing 2 is less than or equal to the rated lubrication coefficient of the lubricating oil in bearing 2, the generator works normally.

[0052] The working principle and beneficial effects of the above technical solution are as follows: the pressure detection module 1 measures the axial load borne by the rolling elements in the bearing 2, the pressure detection module 2 measures the normal load borne by the rolling elements in the bearing 2, the time detection module measures the running time of the generator, the speed detection module measures the rotation speed of the generator drive shaft, the alarm module is used to issue an alarm, the calculation module 1 calculates the lubrication coefficient of the lubricating oil in the bearing 2 based on the axial load borne by the rolling elements in the bearing 2, the processing module compares the lubrication coefficient of the lubricating oil in the bearing 2 obtained by the calculation module 1 with the rated lubrication coefficient of the lubricating oil in the bearing 2, when the lubrication coefficient of the lubricating oil in the bearing 2 is greater than the rated lubrication coefficient of the lubricating oil in the bearing 2, the control module controls the alarm module to issue an alarm and control the generator to stop working at the same time, and when the lubrication coefficient of the lubricating oil in the bearing 2 is less than or equal to the rated lubrication coefficient of the lubricating oil in the bearing 2, the generator works normally.

[0053] Example 6

[0054] Based on Example 5, the calculation module 1 calculates based on the following formula 1:

[0055]

[0056] G is the lubrication coefficient of the lubricating oil in bearing 2, is the viscosity-temperature coefficient of the lubricating oil, d1 is the diameter of the inner rolling element of bearing 2, d2 is the diameter of the outer surface of the inner ring of bearing 2, d3 is the diameter of the inner surface of the outer ring of bearing 2, ε is the pour point coefficient of the lubricating oil, τ is the viscosity coefficient of the lubricating oil, E is the elastic modulus of the inner rolling element of bearing 2, Q1 is the axial load on the inner rolling element of bearing 2, Q2 is the normal load on the inner rolling element of bearing 2, s is the Poisson's ratio of the inner rolling element of bearing 2, s1 is the Poisson's ratio of the inner ring of bearing 2, s2 is the Poisson's ratio of the inner and outer rings of bearing 2, E1 is the elastic modulus of the inner ring of bearing 2, E2 is the elastic modulus of the inner and outer rings of bearing 2, and t is the running time of the generator.

[0057] The working principle and beneficial effects of the above technical solution are: Calculate the maximum lubrication thickness of the lubricating oil in bearing 2 by Calculate the minimum lubrication thickness of the lubricating oil in bearing 2 by The lubrication coefficient of the lubricating oil in bearing 2 is calculated. When the lubrication coefficient of the lubricating oil in bearing 2 is greater than the rated lubrication coefficient of the lubricating oil in bearing 2, the control module controls the alarm module to sound an alarm and control the generator to stop working. When the lubrication coefficient of the lubricating oil in bearing 2 is less than or equal to the rated lubrication coefficient of the lubricating oil in bearing 2, the generator works normally.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A generator bearing oil discharge structure, characterized in that: include: A bearing (2), wherein the bearing (2) is sleeved on a generator drive shaft, an outer shell protective sleeve (3) is arranged outside the bearing (2), a first outer cover (4) and a second outer cover (5) are detachably connected to the two sides of the bearing (2), the bearing (2) and the first outer cover (4) and the second outer cover (5) are detachably connected via fasteners, an oil-slinging plate (6) coaxially connected to the left end of the bearing (2) is arranged inside the first outer cover (4), an oil-passing port (7) is arranged at one end of the first outer cover (4) away from the oil-slinging plate (6), a sealing ring (8) is arranged on the side of the second outer cover (5) contacting the generator drive shaft, and a sealing ring (9) is arranged inside the first outer cover (4) for the bearing (2) to be used for sealing the bearing (2) ), the first oil discharge passage comprising a barrier ring (9) fixedly mounted on the inner wall of the first outer cover (4) and located outside the oil slinger (6), an oil discharge gap (10) arranged between the barrier ring (9) and the oil slinger (6), an oil discharge chamber (11) arranged between the inner end surface of the first outer cover (4) and the end surface of the oil slinger (6) close to the shaft retaining ring (15), and a first oil discharge port (12) arranged at the bottom of the first outer cover (4); the oil passage (7), the first bearing (2), the oil discharge gap (10), the oil discharge chamber (11) and the first oil discharge port (12) are sequentially connected, and a one-way valve (14) is arranged in the first oil discharge port (12).

2. A generator bearing oil drainage system, characterized in that: It comprises a generator bearing oil drainage structure as claimed in claim 1, characterized in that it also comprises a lubricating oil filter (16), wherein the lubricating oil filter (16) is arranged outside the outer shell protective sleeve (3), and the lubricating oil filter (16) is connected to the first oil drainage port (12).

3. A generator bearing oil drainage system according to claim 2, characterized in that: The lubricating oil filter (16) comprises a filter tank (17), one end of which is provided with a filter cover (18), an oil inlet pipe (19) is provided on the filter cover (18), the oil inlet pipe (19) is communicated with the first oil outlet (12), the other end of the filter tank (17) is provided with a second oil outlet (20), two sliding grooves (21) are symmetrically provided on the inner wall of the filter tank (17), a first filter plate (22) is clamped on the sliding groove (21) on the side close to the filter cover (18), and a fixing plate (23) is clamped in the middle of the first filter plate (22).

4. A generator bearing oil drainage system according to claim 3, characterized in that: A filter ring (24) is arranged on the fixed plate (23); a first filter element (25) is arranged between the filter ring (24) and the inner wall of the filter tank (17); a second filter plate (26) is clamped on the sliding groove (21) below the first filter plate (22); a second filter element (27) is arranged between the first filter plate (22) and the second filter plate (26); a third filter plate (28) is clamped on the sliding groove (21) below the second filter plate (26); a third filter element (29) is arranged between the second filter plate (26) and the third filter plate (28); and a buffer mechanism (30) is arranged on the inner wall of the filter tank (17) below the third filter plate (28).

5. A generator bearing oil drainage system according to claim 4, characterized in that: The buffer mechanism (30) comprises a limit ring (31), the limit ring (31) is fixedly arranged at the bottom of the third filter plate (28), the limit seat (32) is fixedly arranged on the inner wall of the filter tank (17), a limit groove (33) is provided in the limit seat (32), the limit ring (31) is inserted in the limit groove (33), and a first buffer spring (34) and a second buffer spring (35) are respectively arranged on the outer wall and the inner wall of the limit ring (31).

6. A generator bearing oil drainage system according to claim 1, characterized in that: Also includes: A pressure detection module 1, used for measuring the axial load on the rolling element in the bearing (2); A second pressure detection module is used to measure the normal load on the rolling element in the bearing (2); A time detection module, used to measure the running time of the generator; A rotation speed detection module, used to measure the rotation speed of the generator drive shaft; An alarm module, used for issuing an alarm; A calculation module 1, used to calculate the lubrication coefficient of the lubricating oil in the bearing (2) based on the axial load on the rolling element in the bearing (2); A processing module, used for comparing the lubrication coefficient of the lubricating oil in the bearing (2) obtained by the calculation module 1 with the rated lubrication coefficient of the lubricating oil in the bearing (2); The control module controls the alarm module to sound an alarm and control the generator to stop working when the lubrication coefficient of the lubricating oil in the bearing (2) is greater than the rated lubrication coefficient of the lubricating oil in the bearing (2); and the generator works normally when the lubrication coefficient of the lubricating oil in the bearing (2) is less than or equal to the rated lubrication coefficient of the lubricating oil in the bearing (2).

7. A generator bearing oil drainage system according to claim 6, characterized in that: The calculation module 1 calculates based on the following formula 1: G is the lubrication coefficient of the lubricating oil in the bearing (2), φ is the viscosity-temperature coefficient of the lubricating oil, d1 is the diameter of the rolling element in the bearing (2), d2 is the diameter of the outer surface of the inner ring of the bearing (2), d3 is the diameter of the inner surface of the outer ring of the bearing (2), D is the number of rolling elements in the bearing (2), ε is the pour point coefficient of the lubricating oil, τ is the viscosity coefficient of the lubricating oil, E is the elastic modulus of the rolling element in the bearing (2), Q1 is the axial load on the rolling element in the bearing (2), Q2 is the normal load on the rolling element in the bearing (2), s is the Poisson's ratio of the rolling element in the bearing (2), s1 is the Poisson's ratio of the inner ring of the bearing (2), s2 is the Poisson's ratio of the inner and outer rings of the bearing (2), E1 is the elastic modulus of the inner ring of the bearing (2), E2 is the elastic modulus of the inner and outer rings of the bearing (2), t is the running time of the generator, and v is the rotation speed of the generator drive shaft.

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