Plain bearing, gearbox assembly, gearbox and method of pre-lubrication

Abstract

The application discloses a sliding bearing, a gear box assembly, a gear box and a pre-lubricating method, which are used in cooperation with a gear, a first channel for passing a first lubricating medium is arranged on the sliding bearing, a second channel for passing a second lubricating medium is arranged on the sliding bearing, the second channel is independent of the first channel in the interior of the sliding bearing, and the second channel comprises an outlet which is located on the side of the sliding bearing. Before the gear box works normally, the second lubricating medium is passed into the second channel and flows to the outlet, so that the gap between the gear and the sliding bearing is filled with the second lubricating medium, and a small amount of the second lubricating medium is stored in the second channel, thereby enhancing the lubricating capacity of the sliding bearing in the working condition before the normal work, reducing the damage of the sliding bearing caused by impact, friction and corrosion, reducing the requirements of the sliding bearing on the equipment in the processes of assembly, transportation, loading and unloading and hoisting, and thereby reducing the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sliding bearings, in particular to a sliding bearing, a gearbox assembly, a gearbox and a pre-lubrication method. BACKGROUND

[0002] The gearbox of a wind turbine includes sliding bearings and gears, wherein the sliding bearings and gears cooperate, and the sliding bearings will be damaged due to impact and corrosion in the working condition before normal operation of the gearbox assembly, transportation and handling and hoisting, for example, during transportation, the reverse torque is usually applied at the input end and output end of the main gearbox to lock the gearbox so that it cannot operate, but the sliding bearings have play, and the gear transmission has clearance, so that the main gearbox transmission components have a slight movement in other degrees of freedom, which will still cause damage to the sliding bearings due to friction, in order to reduce the damage, the usual measures are to improve the smoothness of the gearbox assembly, transportation and handling and hoisting process, but this will have higher requirements for the assembly, transportation and hoisting equipment, resulting in increased costs. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome or alleviate the defect that the gearbox in the prior art has high cost of equipment for sliding bearing assembly, transportation and handling and hoisting before normal operation, and to provide a sliding bearing, a gearbox assembly, a gearbox and a pre-lubrication method.

[0004] The present application solves the above technical problems by the following technical scheme: a sliding bearing for cooperating with a gear, a first channel for passing a first lubricating medium is formed on the sliding bearing, a second channel for passing a second lubricating medium is also formed on the sliding bearing, the second channel is independent of the first channel inside the sliding bearing, the second channel includes an outlet, and the outlet is located on the side surface of the sliding bearing.

[0005] In the present application, the first passage and the second passage can be used to respectively pass lubricants such as lubricating oil and grease. By opening the second passage on the sliding bearing, the lubricating grease is passed into the second passage and flows to the outlet before the gear box is normally operated, so that the gap between the gear and the sliding bearing is filled with lubricating grease, and a small amount of lubricating grease is stored in the second passage, thereby enhancing the lubricating capacity of the sliding bearing in the working condition before the normal operation of the gear box assembly, transportation, handling and lifting, reducing the damage of the sliding bearing caused by friction and corrosion, and reducing the friction damage and the requirement for the equipment of the sliding bearing during the assembly, transportation, handling and lifting, thereby reducing the cost. If the passage for passing the lubricating grease is not provided, and the lubricating grease is directly passed into the passage for passing the lubricating oil, the lubricating grease will block the flow of the lubricating oil in the initial stage of the normal operation of the gear box, thereby reducing the lubricating effect during the normal operation. The structure can ensure the lubricating effect of the lubricating oil during the normal operation while achieving the pre-lubricating effect.

[0006] Preferably, the second passage comprises an inlet, and the inlet is opened on the end surface of the sliding bearing.

[0007] In the present application, the end surface of the sliding bearing does not slide with the gear and does not bear the load during the normal operation of the gear box, thereby avoiding the influence on the strength of the sliding bearing, and there is enough space on the end surface for injecting the lubricating grease.

[0008] Preferably, the second passage comprises an inlet, and the second passage further comprises a one-way check valve for preventing the second lubricating medium from flowing back to the inlet, and the one-way check valve is arranged at the inlet.

[0009] In the present application, the lubricating grease is injected into the one-way check valve by the pressurization of the pressure injection gun, the lubricating grease opens the one-way check valve under the pressure, and flows along the second passage to the outlet, thereby achieving the lubricating effect, and avoiding the backflow of the lubricating grease in the second passage.

[0010] Preferably, a guide groove is opened on the side surface of the sliding bearing, and the outlet is opened on the guide groove.

[0011] In the present application, the lubricating grease flows to the guide groove after passing through the outlet, and the guide groove facilitates the filling of the lubricating grease into the gap when the sliding bearing moves, thereby guiding the lubricating grease and making the distribution of the lubricating grease in the gap more uniform. Moreover, a certain amount of lubricating grease can be stored in the guide groove after the pressure injection gun injects the lubricating grease, and the lubricating grease in the guide groove can supplement the lubricating grease in the gap when the amount of the lubricating grease in the gap decreases, thereby further ensuring the lubricating effect.

[0012] Preferably, the guide groove extends at least partially along the circumference of the sliding bearing.

[0013] In this scheme, the guide groove is arranged to facilitate the circumferential flow of the lubricating medium to the bearing area, thereby improving the lubricating effect, and the sliding bearing is easily displaced along the circumference, and the guide groove has a better guiding effect on the lubricating medium.

[0014] Preferably, an oil storage groove for storing the lubricating oil is formed on the side surface of the sliding bearing, and the guide groove is in communication with the oil storage groove.

[0015] In this scheme, before the gear box is normally operated, the oil storage groove is not filled with lubricating oil, and when the lubricating grease is injected into the second channel, the lubricating grease can flow into the oil storage groove through the guide groove. The oil storage groove can temporarily store a part of the lubricating grease, and can supplement the lubricating grease in the gap when the lubricating grease is insufficient, thereby ensuring the lubricating effect.

[0016] Preferably, the sliding bearing has a non-bearing area, and the guide groove is formed on the non-bearing area.

[0017] In this scheme, the structure is arranged to reduce the influence of the guide groove on the strength of the sliding bearing, and the gap at the non-bearing area is larger, which is beneficial to the flow of the lubricating grease.

[0018] Preferably, the length direction slot of the guide groove is gradually narrowed from the middle to both ends.

[0019] In this scheme, the structure is arranged to improve the guiding ability of the guide groove on the lubricating grease, so that the lubricating grease is more evenly distributed in the gap.

[0020] The application also discloses a gear box assembly comprising the sliding bearing.

[0021] In this scheme, before the gear box is normally operated, the gap between the sliding bearing and the gear is filled with lubricating grease by injecting the lubricating grease into the second channel. Due to the pre-lubricating effect of the lubricating grease, the risk of friction damage in the working condition before normal operation such as assembly, transportation, handling and lifting is avoided.

[0022] The application also discloses a gear box comprising the gear box assembly.

[0023] The application also discloses a pre-lubricating method of a sliding bearing, which comprises the steps of: injecting a second lubricating medium into the second channel before the sliding bearing and the gear are normally operated, and flowing the second lubricating medium to the outlet.

[0024] In the present scheme, by adding a pre-lubrication step using the second lubricating medium before the sliding bearing and the gear are in normal operation, the gap between the sliding bearing and the gear is filled with the second lubricating medium, so that the gear box can be effectively lubricated during assembly, transportation, handling and hoisting, etc., thereby avoiding damage caused by friction.

[0025] The positive progress effect of the present application at least includes one of the following effects: by opening the second channel on the sliding bearing, the lubricating grease is passed into the second channel and flows to the outlet before the gear box is in normal operation, so that the gap between the gear and the sliding bearing is filled with the lubricating grease, and a small amount of lubricating grease is stored in the second channel, thereby enhancing the lubricating capacity of the sliding bearing during the normal operation of the gear box assembly, transportation, handling and hoisting, etc., reducing the damage to the sliding bearing caused by impact, friction and corrosion, and even in the single-blade hoisting process, the relative rotational speed is low and the load is large, the friction damage can still be reduced, the requirements of the sliding bearing on the equipment during assembly, transportation, handling and hoisting, etc. are reduced, thereby reducing the cost; the guide groove facilitates the filling of the lubricating grease into the gap, plays a guiding role on the lubricating grease, makes the distribution of the lubricating grease in the gap more uniform, and after the pressure injection gun injects the lubricating grease, a certain amount of lubricating grease can be stored in the guide groove and the oil storage groove, which can supplement the gap when the amount of lubricating grease in the gap is reduced, thereby further ensuring the lubricating effect. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure schematic view of the sliding bearing of the present application embodiment 1.

[0027] Figure 2 It is a structure schematic view of the sliding bearing of the present application embodiment 1. Figure 1 It is a structure schematic view of the sliding bearing of the present application embodiment 1.

[0028] Figure 3 It is a structure schematic view of the sliding bearing of the present application embodiment 1. Figure 1 It is a structure schematic view of the sliding bearing of the present application embodiment 1.

[0029] Figure 4 It is a structure schematic view of the sliding bearing of the present application embodiment 1. Figure 1 It is a structure schematic view of the sliding bearing of the present application embodiment 1.

[0030] Figure 5 It is a structure schematic view of the sliding bearing of the present application embodiment 1. Figure 1 It is a structure schematic view of the sliding bearing of the present application embodiment 1.

[0031] Figure 6 It is a partial sectional view of the gear box assembly of the present application embodiment.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] Sliding bearing 1

[0034] First channel 11

[0035] Second channel 12

[0036] Outlet 13

[0037] Inlet 14

[0038] One-way check valve 15

[0039] Guide groove 16

[0040] Oil reservoir 17

[0041] Oil inlet 18

[0042] Oil outlet 19

[0043] Gear 2

[0044] Gap 3 DETAILED DESCRIPTION

[0045] The application will be further described by way of example but without intending to limit the application to the described examples.

[0046] As Figures 1-6 shown, the present example discloses a sliding bearing 1 for cooperating with a gear 2, the sliding bearing 1 having a first channel 11 for passing a first lubricating medium, the sliding bearing 1 further having a second channel 12 for passing a second lubricating medium, the second channel 12 being independent of the first channel 11 inside the sliding bearing 1, the second channel 12 comprising an outlet 13, the outlet 13 being located at a side of the sliding bearing 1.

[0047] In the embodiment, the first lubricating medium is lubricating oil, and the second lubricating medium is lubricating grease. The second channel 12 is formed in the sliding bearing 1. Before the gear box is normally operated, the lubricating grease is injected into the second channel 12 and flows to the outlet 13, so that the gap 3 between the gear 2 and the sliding bearing 1 is filled with the lubricating grease, and a small amount of lubricating grease is stored in the second channel 12. Thus, the lubricating ability of the sliding bearing 1 is enhanced before the gear box is normally operated, such as assembly, transportation, handling and lifting, and the damage of the sliding bearing 1 caused by friction is reduced. Although a small amount of lubricating grease leaks from both ends of the gap 3, the gap 3 between the gear 2 and the sliding bearing 1 is very small, and has a good sealing effect. The lubricating grease can play a good lubricating effect. If the channel for injecting the lubricating oil is directly used to inject the lubricating grease, the lubricating grease will block the flow of the lubricating oil at the initial stage of the normal operation of the gear box, and the lubricating effect of the lubricating oil during the normal operation is reduced. The structure can achieve the pre-lubricating effect, and ensure the lubricating effect of the lubricating oil during the normal operation.

[0048] In other alternative embodiments, the first lubricating medium and the second lubricating medium can be selected according to actual needs. The first lubricating medium and the second lubricating medium can be lubricating oils with different viscosities, or lubricating greases, or solid lubricants with appropriate hardness. As long as the first lubricating medium and the second lubricating medium can respectively fill the gap and / or play a lubricating role before and during the normal operation of the sliding bearing.

[0049] As shown in Figure 1 and Figure 3 , the second channel 12 includes an inlet 14 formed on the end surface of the sliding bearing 1. During the normal operation of the gear box, the end surface of the sliding bearing 1 does not slide with the gear 2 and does not bear load, so as to avoid affecting the strength of the sliding bearing 1. In addition, there is enough space on the end surface for injecting the lubricating grease. Of course, in other alternative embodiments, the inlet 14 can be formed on the side surface of the sliding bearing 1, i.e., the inlet 14 can not be formed on the end surface of the sliding bearing 1.

[0050] As shown in Figure 1 and Figure 3 , the second channel 12 further includes a one-way check valve 15 for preventing the lubricating grease from flowing back to the inlet 14. The one-way check valve 15 is arranged at the inlet 14. The lubricating grease is injected into the one-way check valve 15 by the pressurizing effect of the pressure injection gun. The lubricating grease opens the one-way check valve 15 under the pressure, and flows along the second channel 12 to the outlet 13, so as to achieve the lubricating effect, and avoid the lubricating grease flowing back in the second channel 12. Of course, in other alternative embodiments, the one-way valve can not be arranged. When the injection of the lubricating grease is completed, a plug is used to plug the inlet 14, so as to also prevent the lubricating grease from flowing back.

[0051] As shown in Figure 1 and Figure 3 , the side surface of the sliding bearing 1 is provided with a guide groove 16, and the outlet 13 is provided on the guide groove 16. The lubricating grease flows into the guide groove 16 through the outlet 13. When the sliding bearing 1 moves, the guide groove 16 facilitates the filling of the lubricating grease into the gap 3, plays a guiding role for the lubricating grease, and makes the distribution of the lubricating grease in the gap 3 more uniform. Moreover, after the pressure injection gun injects the lubricating grease, a certain amount of lubricating grease can be stored in the guide groove 16. When the amount of lubricating grease in the gap 3 decreases, the lubricating grease in the guide groove 16 can supplement the gap 3, thereby further ensuring the lubricating effect. Of course, in other alternative embodiments, the guide groove 16 can not be provided, and the lubricating grease can directly flow to the gap 3 through the outlet 13 on the side surface of the sliding bearing 1 to lubricate the gear box.

[0052] As shown in Figure 1 , the guide groove 16 extends at least partially along the circumference of the sliding bearing 1. Through such a design, the lubricating medium flows along the circumferential guide groove 16 to the bearing area, thereby improving the lubricating effect. At the same time, the sliding bearing 1 is easy to displace along the circumference, and this structure provides the guide groove 16 with a better guiding effect for the lubricating grease. Of course, in other alternative embodiments, the guide groove 16 can extend along other directions on the side surface of the sliding bearing 1.

[0053] As shown in Figure 1 and Figure 2 , the side surface of the sliding bearing 1 is provided with an oil storage groove 17 for storing lubricating oil, and the guide groove 16 is in communication with the oil storage groove 17. Before the gear box normally works, the oil storage groove 17 is not filled with lubricating oil. When the lubricating grease is injected into the second channel 12, the lubricating grease can flow into the oil storage groove 17 through the guide groove 16. The oil storage groove 17 can temporarily store a part of the lubricating grease, and can supplement the lubricating grease in the gap 3 when the lubricating grease is insufficient, thereby ensuring the lubricating effect. Of course, in other alternative embodiments, the oil storage groove 17 on the sliding bearing 1 can not be in communication with the guide groove 16, and the lubricating grease can enter the oil storage groove 17 through the gap 3, and the oil storage groove 17 also has a certain storage effect.

[0054] In the present embodiment, the sliding bearing 1 has a non-bearing area, and the guide groove 16 is provided on the non-bearing area. Through this structure, the influence of the guide groove 16 on the strength of the sliding bearing 1 is reduced, and at the same time, the gap 3 at the non-bearing area is larger, which is conducive to the flow of the lubricating grease. Of course, in other alternative embodiments, the guide groove 16 can also be provided at other positions.

[0055] As shown in Figure 1As shown, the guide groove 16 gradually narrows from the middle to both ends along its length. This structural design improves the guiding ability of the guide groove 16 for grease, resulting in a more uniform distribution of grease within the gap 3.

[0056] Specifically, in this embodiment, such as Figures 1-5 As shown, the sliding bearing 1 is a combination of two sub-sliding bearings, namely, the sliding bearing 1 includes a right sub-sliding bearing and a left sub-sliding bearing. Each sub-sliding bearing has a corresponding first channel 11, second channel 12, guide groove 16, and oil reservoir 17. Two inlets and two oil outlets are all located on the right sub-sliding bearing. Of course, in other alternative embodiments, the gearbox may also have only one sliding bearing, with one corresponding first channel 11, second channel 12, guide groove 16, and oil reservoir 17 on the sliding bearing 1.

[0057] Specifically, the first channel 11 and the second channel 12 are two independent channels. The first channel 11 includes an oil inlet 18 and an oil outlet 19. The oil inlet 18 is located on the side of the sliding bearing 1 and near the end face. The grease can flow into the oil reservoir 17 through the guide groove 16. Although a small amount of grease can enter the first channel 11 through the oil reservoir 17, the amount of grease entering is small. In the initial stage of normal operation of the gearbox, the lubricating oil in the first channel 11 can easily carry the grease out of the working surface through dissolution or impact, which basically does not affect the lubrication effect of the lubricating oil. On the other hand, since the scheme of this embodiment is provided with mutually connected guide groove 16 and oil reservoir 17, both guide groove 16 and oil reservoir 17 can play the role of storing lubricating medium before and after the gearbox is working normally, which improves the ability of sliding bearing to store lubricating medium. In the initial stage of normal operation of the gearbox, after the first lubricating medium flows into the oil reservoir 17 from the first channel 11, it can also flow into the guide groove 16 through the oil reservoir 17, so that the first lubricating medium and the second lubricating medium can fully contact each other, minimizing the residue of the second lubricating medium when the gearbox is working normally. At the same time, it can also make the first lubricating medium flow more smoothly into the bearing area along the guide groove 16, which enhances the lubrication effect when the gearbox is working normally.

[0058] In this embodiment, the side of the sliding bearing includes a laser-clad copper alloy layer. Specifically, the laser-clad copper alloy layer is located in the area of ​​the sliding bearing that mates with the gear, i.e., the gap between the sliding bearing and the gear.

[0059] It should be noted that the gearbox in this embodiment is only for the purpose of illustrating the working principle of the sliding bearing in this embodiment. The present invention is not limited to gearboxes. As long as a transmission system uses sliding bearings, the solution of the present invention can be used to at least solve one of the above-mentioned technical problems.

[0060] Example 2

[0061] As Figure 6 shown, the embodiment discloses a gear box assembly comprising the sliding bearing 1 described above. The gear box assembly is filled with lubricating grease in the gap 3 between the sliding bearing 1 and the gear 2 by injecting lubricating grease into the second channel 12 before normal operation, so that the risk of friction damage in the working condition before normal operation such as assembly, transportation, loading and unloading, and hoisting is avoided due to the pre-lubrication of the lubricating grease, and the requirements for the equipment during the process of assembly, transportation, loading and unloading, and hoisting are reduced, thereby reducing the cost.

[0062] Embodiment 3

[0063] The embodiment discloses a gear box comprising the gear box assembly described above. The gear box is filled with lubricating grease in the gap 3 between the sliding bearing 1 and the gear 2 by injecting lubricating grease into the second channel 12 before normal operation, so that the risk of friction damage in the working condition before normal operation such as assembly, transportation, loading and unloading, and hoisting is avoided due to the pre-lubrication of the lubricating grease, and the requirements for the equipment during the process of assembly, transportation, loading and unloading, and hoisting are reduced, thereby reducing the cost.

[0064] Embodiment 4

[0065] The embodiment discloses a pre-lubrication method of a sliding bearing, which comprises the steps of: injecting lubricating grease into the second channel 12 and flowing the lubricating grease to the outlet 13 before the sliding bearing 1 and the gear 2 are in normal operation. By adding the pre-lubrication step of using lubricating grease before the sliding bearing 1 and the gear 2 are in normal operation, the gap 3 between the sliding bearing 1 and the gear 2 is filled with lubricating grease, so that the gear box can be effectively lubricated during the working condition process such as assembly, transportation, loading and unloading, and hoisting, thereby avoiding damage caused by friction.

[0066] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A sliding bearing for mating with a gear, said sliding bearing having a first channel for introducing a first lubricating medium, characterized in that, The sliding bearing is further provided with a second channel for introducing a second lubricating medium. The second channel is independent of the first channel inside the sliding bearing. The second channel includes an outlet located on the side of the sliding bearing. A guide groove is provided on the side of the sliding bearing, and the outlet is located on the guide groove. The lubricating medium flows to the guide groove after passing through the outlet. The guide groove extends at least partially along the circumference of the sliding bearing. The opening of the guide groove gradually narrows from the middle to both ends along its length. An oil reservoir for storing the lubricating medium is provided on the side of the sliding bearing. The first channel includes an oil outlet, which is connected to the oil reservoir. The guide groove is connected to the oil reservoir.

2. The sliding bearing as described in claim 1, characterized in that, The second channel includes an inlet that is formed on the end face of the sliding bearing.

3. The sliding bearing as described in claim 1, characterized in that, The second channel includes an inlet and further includes a one-way check valve for preventing the second lubricating medium from flowing back into the inlet, the one-way check valve being disposed at the inlet.

4. The sliding bearing as described in claim 1, characterized in that, The sliding bearing has a non-load-bearing area, and the guide groove is formed in the non-load-bearing area.

5. A gearbox assembly, characterized in that, It includes the sliding bearing as described in any one of claims 1-4.

6. A gearbox, characterized in that, It includes the gearbox assembly as described in claim 5.

7. A pre-lubrication method for a sliding bearing as described in any one of claims 1-4, characterized in that, It includes the steps of: before the sliding bearing and the gear are working normally, introducing a second lubricating medium into the second channel and allowing the second lubricating medium to flow to the outlet.

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