Lubricating device for bearing of generator set

Abstract

The utility model belongs to the technical field of bearing lubrication, and particularly relates to a generator set bearing lubrication device which comprises a bearing seat and an end cover arranged at one end of the bearing seat, an inner ring of the bearing seat is provided with a first oil retainer, the generator set bearing lubrication device further comprises an injection hole and a first grease discharge hole, and the injection hole extends to the bearing seat from the end cover and penetrates through the bearing seat to be communicated with the interior of a bearing body; the first grease discharging hole extends from the axial end of the end cover to the other axial end of the end cover, a cleaning agent enters the bearing body through the injection port under certain pressure, aged lubricating grease is discharged from the first grease discharging hole, the lubricating grease which is hardened and becomes sticky is softened and difficult to discharge, the cleaning agent has certain lubricity, and under the condition that the generator set bearing continuously rotates, the lubricating grease can be effectively discharged. New lubricating grease is injected through the injection port, and the cleaning agent is discharged, so that waste grease in the bearing of the generator can be cleaned more thoroughly and an oil way can be dredged under the condition that the waste grease in the bearing of the generator cannot be discharged normally and the end cover of the bearing seat cannot be detached, and the purpose of normal grease discharge is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of bearing lubrication technology, and specifically relates to a lubrication device for generator set bearings. Background Technology

[0002] Generator bearings are crucial support and transmission components of wind turbines, and their proper functioning directly impacts the power generation of the turbine. During actual operation, with increasing service life, a large amount of grease accumulates in the areas of the generator bearings, oil slinger rings, and oil retainer rings, as well as in the bearing end caps. This grease gradually ages and hardens along with the base oil, occupying the grease space within the generator bearing without providing lubrication. Furthermore, it generates heat due to agitation, leading to increased bearing temperature and ultimately causing poor lubrication, potentially resulting in bearing damage. Current technology involves shutting down the turbine, removing the bearing end caps, and then using carbon dioxide or cleaning agents to flush out the waste grease. However, this method is unsuitable for generator bearings where the end caps cannot be removed, resulting in a large workload, high labor intensity, and increased maintenance costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a generator set bearing lubrication device that can clean the waste grease in the generator bearing and unclog the oil passage when the waste grease in the generator bearing cannot be discharged normally and the bearing seat end cover cannot be removed, so as to achieve the purpose of normal grease discharge.

[0004] The present invention comprises: a bearing housing and an end cap disposed at one end of the bearing housing, wherein an oil retaining ring is provided on the inner ring of the bearing housing, and is characterized in that it further comprises:

[0005] An injection hole extends from the end cap to the bearing housing and communicates with the interior of the bearing body.

[0006] Grease drain hole one, which extends from the axial end of the end cap to the other axial end.

[0007] Optionally, the oil baffle ring has a through hole, and the two ends of the through hole connect the end cover and the interior of the bearing body.

[0008] Optionally, the through hole and the grease drain hole are axially aligned.

[0009] Optionally, the generator set bearing lubrication device further includes a second grease drain hole, which extends from one axial end of the end cover to the other axial end and is located below the generator shaft.

[0010] Optionally, the second fat-draining hole is connected to a manual fat-draining device.

[0011] Optionally, the outer ports of multiple injection holes are distributed on the outer periphery of the end cap.

[0012] Optionally, the outer ports of the multiple grease drain holes are axially distributed on the end face of the end cap.

[0013] Optionally, the generator set bearing lubrication device further includes an oil baffle ring two that rotates synchronously with the inner ring of the generator shaft and the bearing body, wherein the oil baffle ring two and the oil baffle ring one have a gap to form an overflow channel.

[0014] Optionally, the end of the second oil baffle ring away from the bearing body is a convex ring structure extending radially outward, and the end of the first oil baffle ring near the second oil baffle ring is a convex ring structure extending radially inward.

[0015] Optionally, a labyrinth seal is provided at the end of the bearing housing away from the end cover. The labyrinth seal has an annular cavity and an annular groove on the side near the bearing housing. Multiple notches are provided between the annular cavity and the annular groove. The injection hole communicates with the annular groove.

[0016] The beneficial effects of this utility model are that the cleaning agent enters the bearing body through the injection port under certain pressure, discharges the aged grease through the grease drain hole, and softens the hardened and viscous grease that is difficult to discharge. The cleaning agent has a certain degree of lubricity. When the generator bearing is continuously rotating, new grease is injected through the injection port and the cleaning agent is discharged. This can more thoroughly clean the waste grease in the generator bearing and unclog the oil passage when the waste grease in the generator bearing cannot be discharged normally and the bearing housing end cover cannot be removed, so as to achieve the purpose of normal grease discharge. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the generator set bearing lubrication device of this utility model;

[0018] Figure 2 This is a front view of the generator set bearing lubrication device of this utility model;

[0019] Figure 3 for Figure 2 AA section view in the middle;

[0020] Figure 4 for Figure 2 BB cross-section view in the middle;

[0021] Figure 5 for Figure 4 Enlarged view of area C in the image;

[0022] Figure 6 This is a schematic diagram showing the operating state of the generator set bearing lubrication device of this utility model.

[0023] In the diagram: 10. Generator set bearing lubrication device; 11. Bearing housing; 12. End cover; 121. Injection hole; 122. Grease drain hole one; 123. Grease drain hole two; 124. Cavity; 125. Baffle; 13. Oil retainer ring one; 131. Through hole; 14. Bearing body; 15. Oil retainer ring two; 16. Labyrinth seal; 161. Annular cavity; 162. Annular groove; 163. Notch; 20. Generator shaft. Detailed Implementation

[0024] like Figure 1-6 As shown, the present invention provides a generator set bearing lubrication device, including a bearing housing 11 and an end cover 12 disposed at one end of the bearing housing 11. The inner ring of the bearing housing 11 is provided with an oil retaining ring 13. The device also includes an injection hole 121 and a grease discharge hole 122. The injection hole 121 extends from the end cover 12 to the bearing housing 11 and penetrates through to communicate with the interior of the bearing body 14. The grease discharge hole 122 extends from the axial end of the end cover 12 to the other axial end.

[0025] Compared with the prior art, the generator set bearing lubrication device 10 provided by this utility model allows the cleaning agent to enter the bearing body 14 through the injection port under certain pressure, discharge the aged grease through the grease discharge hole 122, and soften the hardened and viscous grease that is difficult to discharge. The cleaning agent has a certain lubricity. When the generator set bearing is continuously rotating, new grease is injected through the injection port and the cleaning agent is discharged. This can more thoroughly clean the waste grease in the generator shaft 20 bearing when the waste grease cannot be discharged normally and the bearing seat 11 end cover 12 cannot be removed, thus clearing the oil passage and achieving the purpose of normal grease discharge.

[0026] In this embodiment, please refer to Figure 3 The oil baffle ring 13 has a through hole 131, the two ends of which connect the end cover 12 and the interior of the bearing body 14. Specifically, when the generator shaft 20 rotates, under the action of centrifugal force, the new and old grease and cleaning agent impact each other circumferentially outward. The through hole 131 is closer to the circumferential outer side of the bearing body 14, which is conducive to the flow of fluid (referring to the new and old grease and cleaning agent) and can speed up the efficiency of grease removal and replacement.

[0027] Furthermore, the through hole 131 and the grease drain hole 122 are axially aligned. With this arrangement, more fluid coming out of the bearing body 14 through the through hole 131 can directly enter the grease drain hole 122, shortening the stroke and improving the efficiency of grease draining and grease replacement.

[0028] In one embodiment, see Figure 2 and Figure 3The generator set bearing lubrication device also includes a second grease drain hole 123, which extends from one axial end of the end cover 12 to the other axial end and is located below the generator shaft 20. This arrangement allows old grease to be further discharged through the grease drain hole by gravity.

[0029] Furthermore, the grease drain port 2123 is connected to a manual grease drain device, which includes an oil pump, a distributor, and corresponding piping. Currently, automatic grease drain devices are generally used, which include a controller, an oil pump, a distributor, and sensors for monitoring lubricating oil temperature, pressure, and flow. These devices can replenish or replace lubricating grease according to a set program and the lubricating oil temperature and pressure. In some situations, the automatic grease drain device may malfunction, or the set time may not have elapsed before the grease needs to be replenished or replaced. In these cases, the manual grease drain device can solve the aforementioned problems.

[0030] In one embodiment, see Figure 2 Multiple injection holes 121 are distributed on the outer periphery of the end cover 12, which can avoid the first grease drain hole 122 and the second grease drain hole 123, making it convenient for the installation of grease injection equipment and cleaning agent injection equipment, and allowing the bearing body 14 to be reached in a shorter distance; multiple injection holes 121 can improve work efficiency.

[0031] In one embodiment, the outer ports of multiple grease drain holes 122 are axially distributed on the end face of the end cover 12. During normal operation of the generator set, in order to prevent the grease from being lost too quickly due to excessive pressure caused by excessive grease in the bearing body 14 in the gap between the oil baffle ring 13 and the oil baffle ring 15, at least three through holes 131 are opened in the oil baffle ring 13. Correspondingly, three grease drain holes 122 are opened in the end cover 12, and a grease draining device is connected to discharge and collect the waste grease generated during the operation of the generator set.

[0032] In one embodiment, the generator set bearing lubrication device 10 further includes an oil retainer ring 2 15 that rotates synchronously with the inner ring of the generator shaft 20 and the bearing body 14. The oil retainer ring 2 15 and the oil retainer ring 1 13 have a gap to form an overflow channel. Most of the grease enters and exits the cavity 124 of the bearing body 14 and the end cover 12 through this overflow channel.

[0033] Furthermore, the end of the second oil baffle ring 15 furthest from the bearing body 14 is a convex ring structure extending radially outward, while the end of the first oil baffle ring 13 near the second oil baffle ring 15 is a convex ring structure extending radially inward. This arrangement allows the convex ring structure of the second oil baffle ring 15 to store grease, enabling the bearing body 14 to be lubricated by more grease.

[0034] In one embodiment, see Figure 4 and Figure 5A labyrinth seal 16 is provided at the end of the bearing housing 11 away from the end cover 12. The labyrinth seal 16 has an annular cavity 161 and an annular groove 162 on the side closest to the bearing housing 11. Multiple notches 163 are provided between the annular cavity 161 and the annular groove 162. An injection hole 121 communicates with the annular groove 162. Specifically, the injected cleaning agent or new grease passes through the injection hole 121, sequentially through the end cover 12, bearing housing 11, annular groove 162, notches 163, and annular cavity 161, reaching the bearing body 14 from the right end, where the waste grease or cleaning agent is discharged, allowing for a more thorough replacement with new grease.

[0035] In one embodiment, see Figure 3 Multiple baffles 125 are provided inside the cavity 124 of the end cover 12. Each baffle 125 is inclined to the radial direction and has a certain included angle. Preferably, the baffle 125 is located in the upper half of the end cover 12. When the generator shaft 20 rotates, due to centrifugal force, the grease will impact the baffle 125. The baffle 125 can rebound the grease and push it back to the lubrication part of the bearing body 14 through the gap between the second oil baffle ring 15 and the first oil baffle ring 13, thereby improving the lubrication efficiency.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0037] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A genset bearing lubrication apparatus, comprising: The bearing seat (11) and the end cover (12) arranged at one end of the bearing seat (11), the inner ring of the bearing seat (11) is provided with an oil baffle one (13), characterized in that, further comprising: The injection hole (121) extends from the end cover (12) to the bearing seat (11) and communicates with the inside of the bearing body (14); The grease discharge hole one (122) extends from the axial end of the end cover (12) to the other axial end.

2. The genset bearing lubrication apparatus of claim 1, wherein, The oil baffle one (13) is provided with a through hole (131), and the two ends of the through hole (131) communicate with the inside of the end cover (12) and the bearing body (14).

3. The genset bearing lubrication apparatus of claim 2, wherein, The through hole (131) is axially coincident with the grease discharge hole one (122).

4. The genset bearing lubrication apparatus of claim 1, wherein, Further comprising a grease discharge hole two (123) extending from the axial end of the end cover (12) to the other axial end, the grease discharge hole two (123) is located below the generator shaft (20).

5. The genset bearing lubrication apparatus of claim 4, wherein, The grease discharge hole two (123) is connected with a manual grease discharge device.

6. The genset bearing lubrication apparatus of claim 1, wherein, The outer ports of the plurality of injection holes (121) are distributed on the outer periphery of the end cover (12).

7. The genset bearing lubrication apparatus of claim 1, wherein, The outer ports of the plurality of grease discharge hole one (122) are axially distributed on the end face of the end cover (12).

8. The genset bearing lubrication apparatus of claim 1, wherein, Further comprising an oil baffle two (15) which rotates synchronously with the generator shaft (20) and the inner ring of the bearing body (14), the oil baffle two (15) and the oil baffle one (13) have a gap to form an overflow channel.

9. The genset bearing lubrication apparatus of claim 8, wherein, The end of the oil baffle two (15) away from the bearing body (14) is a convex ring structure extending to the radial outside, and the end of the oil baffle one (13) close to the oil baffle two (15) is a convex ring structure extending to the radial inside.

10. The genset bearing lubrication apparatus of any one of claims 1-9, wherein, The end of the bearing seat (11) away from the end cover (12) is provided with a labyrinth seal (16), the side close to the bearing seat (11) of the labyrinth seal (16) is provided with an annular cavity (161) and an annular groove (162), a plurality of notches (163) are arranged between the annular cavity (161) and the annular groove (162), and the injection hole (121) communicates with the annular groove (162).

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