Elastic oil tank for thrust bearing of hydraulic generator

Abstract

The utility model discloses a hydro-generator thrust bearing elastic oil tank which comprises an oil tank seat and supporting iron, the supporting iron is installed in the oil tank seat, the upper end of the supporting iron is fixedly connected with the oil tank seat, a cavity is formed between the interior of the oil tank seat and the supporting iron, the side wall of the oil tank seat is of a corrugated pipe structure, and the bottom supporting face in the oil tank seat is a downwards-concave arc face. The lower end part of the supporting iron is a downwards convex cambered surface; and the curvature radius of the bottom supporting surface is greater than that of the lower end part. According to the utility model, the lower end part of the supporting iron is improved to be the downwards convex cambered surface, the bottom supporting surface in the oil tank seat is improved to be the downwards concave cambered surface, and the curvature radius of the bottom supporting surface is greater than that of the lower end part, so that the supporting iron can be adaptively swung and finely adjusted after the elastic oil tank loses efficacy, and the thrust bearing bush is stressed more uniformly; the elastic fuel tank can still insist to run for a period of time after failure, and preparation time is provided for planned maintenance.

Description

Technical Field

[0001] This utility model relates to the field of hydropower technology, and in particular to an elastic oil tank for a thrust bearing of a hydro generator. Background Technology

[0002] Thrust bearings are one of the most important components of hydro-generator sets, bearing the loads of all rotating parts of the generator set and the maximum water thrust of the turbine. Common support types for thrust bearings include rigid support type, elastic oil tank type, multi-point support type with spring bundles, and counterweight support type. Among these, elastic oil tank type is widely used in large hydro-generator sets due to its advantages such as strong self-balancing ability, strong adaptability to harsh working conditions, and more uniform stress on the thrust bearing during operation.

[0003] See Figure 1 The elastic oil tank 100 is used to support the bearing 200, and the thrust bearing 300 is installed on the bearing 200. The mirror plate 400 is located above the thrust bearing 300.

[0004] Existing hydro-generator units are equipped with multiple flexible oil tanks 100, which are connected in series via pipelines, such as the flexible connection structure of the flexible oil tanks disclosed in CN205977518U. The bottom of the support iron 120 and the bottom of the oil tank seat 110 of the flexible oil tank 100 are flat structures. When the pressure oil in one or more flexible oil tanks 100 leaks, the oil tank loses pressure and fails. Due to processing and installation errors in the oil tank seat 110 and the support iron 120, when the bottom of the support iron 120 contacts the bottom of the oil tank seat 110, a surface contact is formed. The support iron 120 may have a small angle of tilt, resulting in unevenness of the support bearing 200 on the top of the support iron 120. This causes uneven stress on the thrust bearings 300, requiring immediate shutdown to address the issue of the flexible oil tanks, thus causing an accidental shutdown. Utility Model Content

[0005] The purpose of this utility model is to provide an elastic oil tank for the thrust bearing of a hydro-generator. Through the improvement of the elastic oil tank, the support iron can adaptively swing and finely adjust after the elastic oil tank fails, so that the thrust bearing bearing is subjected to more uniform force, and the elastic oil tank can continue to operate for a period of time after failure, providing preparation time for planned maintenance.

[0006] To achieve the above objectives, this utility model provides an elastic oil tank for a thrust bearing of a hydro-generator, comprising an oil tank base and a support iron. The support iron is installed inside the oil tank base, and its upper end is connected and fixed to the oil tank base. There is a cavity between the inside of the oil tank base and the support iron. The side wall of the oil tank base has a corrugated pipe structure. The bottom support surface inside the oil tank base is a concave arc surface, and the lower end of the support iron is a convex arc surface. The radius of curvature of the bottom support surface is greater than the radius of curvature of the lower end.

[0007] A support ring is installed in the annular groove on the inner side wall of the oil tank seat, and the support ring is slidably fitted onto the outer wall of the support iron.

[0008] The oil tank seat is equipped with multiple support rings, and each support ring is slidably connected by multiple guide rods.

[0009] The oil tank seat has a flange located near the top, and the upper end of the guide rod is connected and fixed to the flange. The upper end of the guide rod passes through each of the support rings.

[0010] The flange is provided with a plurality of through holes evenly distributed in a ring. The upper end of the through holes is provided with a countersunk hole. The upper end of the guide rod is provided with a boss. The guide rod is inserted into the through hole, and the boss is located in the countersunk hole.

[0011] An elastic body is installed on the guide rod between adjacent support rings.

[0012] The elastic body is a helical spring or a disc spring.

[0013] Compared with the prior art, this utility model has the following technical effects:

[0014] 1. This utility model improves the lower end of the support iron into a convex arc surface and the bottom support surface inside the oil tank seat into a concave arc surface. The radius of curvature of the bottom support surface is greater than the radius of curvature of the lower end, so that the lower end of the support iron and the oil tank seat form a point contact arc surface. Furthermore, due to the elastic bellows structure of the side wall of the oil tank seat, the support iron can adaptively swing and fine-tune after the elastic oil tank fails, eliminating processing and installation errors, making the support bearing at the top of the support iron flatter, and the thrust bearing bearing bearing more evenly stressed. This allows the elastic oil tank to continue operating for a period of time after failure, providing preparation time for planned maintenance.

[0015] 2. A support ring is installed in the annular groove of the inner side wall of the oil tank seat of this utility model. The support ring supports the support iron and prevents the lower end of the support iron from shaking when the unit is running.

[0016] 3. An elastic body is installed on the guide rod of this utility model between adjacent support rings. The elastic body is installed within the cavity space, and when the height of one of the elastic oil tanks has a negative tolerance, the elastic body can provide a certain supporting force to the support iron. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the usage state of this utility model.

[0019] Figure 2 This is a partial cross-sectional view of the present invention.

[0020] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0021] Figure label:

[0022] Elastic oil tank 100, oil tank seat 110, bottom support surface 111, annular groove 112, support ring 113, through hole 114, cavity 115, flange 116, countersunk hole 117.

[0023] Support iron 120, lower end 121;

[0024] Guide rod 130, boss 131;

[0025] Elastomer 140;

[0026] Torva 200, thrust bearing 300, mirror plate 400. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0028] Example 1:

[0029] See Figure 2 A hydraulic oil tank 100 for a thrust bearing of a hydro-generator includes an oil tank seat 110 and a support 120. The support 120 is installed inside the oil tank seat 110, and its upper end is welded and fixed to the oil tank seat 110. A cavity 115 is provided between the inside of the oil tank seat 110 and the support 120 for injecting pressurized oil. The side wall of the oil tank seat 110 has a corrugated pipe structure. The bottom support surface 111 inside the oil tank seat 110 is a concave arc surface, and the lower end 121 of the support 120 is a convex arc surface. The radius of curvature of the bottom support surface 111 is greater than the radius of curvature of the lower end 121.

[0030] The lower end 121 of the support 120 is improved into a convex arc surface, and the bottom support surface 111 inside the oil tank seat 110 is improved into a concave arc surface. The radius of curvature of the bottom support surface 111 is greater than that of the lower end 121, so that the lower end 121 of the support 120 and the oil tank seat 110 form a point contact arc surface. Furthermore, due to the elastic bellows structure of the side wall of the oil tank seat 110, the support 120 can adaptively swing and finely adjust after the failure of the elastic oil tank 100, eliminating machining and installation errors. This makes the support bearing 200 on the top of the support 120 flatter and the thrust bearing bearing 300 more evenly stressed, allowing the elastic oil tank 100 to continue operating for a period of time after failure, providing preparation time for planned maintenance.

[0031] Meanwhile, because the bottom support surface 111 is low in the middle and high at the edges, the lower end 121 will always move closer to the center of the bottom support surface 111 and will not deviate from the edge of the bottom support surface 111. In addition, it also facilitates the complete discharge of pressure oil.

[0032] Example 2:

[0033] Based on Example 1, see Figure 2 , 3 A support ring 113 is installed in the annular groove 112 on the inner sidewall of the oil tank seat 110. The support ring 113 is slidably fitted onto the outer wall of the support iron 120. When the elastic oil tank 100 fails, the support iron 120 moves down to contact the oil tank seat 110, compressing the oil tank seat 110, and the support iron 120 slides down along the support ring 113. The support ring 113 supports the support iron 120, preventing the lower end of the support iron 120 from shaking during unit operation.

[0034] Furthermore, Figure 2 In the oil tank housing 110, three support rings 113 are installed inside, and each support ring 113 is slidably connected by multiple guide rods 130. The multiple support rings 113 slide on the guide rods 130, and the adjacent support rings 113 are parallel, resulting in better support stability.

[0035] For specific details, see Figure 3 The fuel tank seat 110 has a flange 116 located near the top. The upper end of the guide rod 130 is connected and fixed to the flange 116, and the upper end of the guide rod 130 passes through each support ring 113.

[0036] More specifically, the flange 116 is provided with a plurality of through holes 114 evenly distributed in a ring. The upper end of the through holes 114 is provided with a countersunk hole 117. The upper end of the guide rod 130 is provided with a boss 131. The guide rod 130 is inserted into the through holes 114, and the boss 131 is located in the countersunk hole 117.

[0037] In use, the guide rod 130 is inserted into the through hole 114, the boss 131 is located in the countersunk hole 117, and the support iron 120 presses and limits the boss 131 when it is installed and fixed with the oil tank seat 110.

[0038] In this embodiment, the diameter of the boss 131 is larger than the diameter of the guide rod 130.

[0039] During implementation, multiple sliding holes are evenly distributed in a ring on the support ring 113, and the guide rod 130 passes through the sliding holes. The sliding holes on the support ring 113 correspond to the positions of the through holes 114 on the flange 116.

[0040] Example 3:

[0041] Based on Example 2, see Figure 2 , 3An elastic body 140 is installed on the guide rod 130 between adjacent support rings 113. The elastic body 140 is installed in the space within the cavity 115. When the height of one of the elastic oil tanks 100 has a negative tolerance, the elastic body 140 can provide a certain supporting force to the support iron 120.

[0042] In addition, after the elastic oil tank 100 is repaired from pressure loss and pressure oil is refilled into the cavity 115, the bellows structure on the side wall of the oil tank seat 110 is evenly deployed under the action of the spring 140.

[0043] Specifically, the elastomer 140 is either a helical spring or a disc spring.

[0044] The working principle of this utility model:

[0045] The lower end 121 of the support 120 is improved into a convex arc surface, and the bottom support surface 111 inside the oil tank seat 110 is improved into a concave arc surface. The radius of curvature of the bottom support surface 111 is greater than that of the lower end 121, so that the lower end 121 of the support 120 and the oil tank seat 110 form a point contact arc surface. This not only allows the support 120 to self-adaptively swing and fine-tune after the failure of the elastic oil tank 100, but also makes the support bearing 200 on the top of the support 120 flatter and the thrust bearing bearing 300 more evenly stressed. This allows the elastic oil tank 100 to continue operating for a period of time after failure, providing preparation time for planned maintenance.

Claims

1. A hydro-generator thrust bearing elastic oil tank (100) comprising an oil tank seat (110) and a supporting iron (120), the supporting iron (120) is installed in the oil tank seat (110), the upper end of the supporting iron (120) is fixedly connected with the oil tank seat (110), a cavity (115) is formed between the inside of the oil tank seat (110) and the supporting iron (120), and the side wall of the oil tank seat (110) is in a bellows structure, characterized in that: The bottom supporting surface (111) in the oil tank seat (110) is concave arc surface, the lower end (121) of the supporting iron (120) is convex arc surface; the curvature radius of the bottom supporting surface (111) is greater than the curvature radius of the lower end (121). ​ 2. A hydro-generator thrust bearing elastomeric oil tank as claimed in claim 1, wherein: The annular groove (112) of the inner side wall of the oil tank seat (110) is provided with a supporting ring (113), the supporting ring (113) is sleeved on the outer wall of the supporting iron (120) and slides.

3. A hydro-generator thrust bearing elastomeric oil tank as claimed in claim 2, wherein: A plurality of supporting rings (113) are installed in the oil tank seat (110), and each supporting ring (113) is connected by a plurality of guide rods (130) and slides.

4. A hydro-generator thrust bearing elastomeric oil tank as claimed in claim 3, wherein: A flange (116) is arranged on the oil tank seat (110) near the top, the upper end of the guide rod (130) is connected and fixed with the flange (116), and the upper end of the guide rod (130) penetrates each supporting ring (113).

5. A hydro-generator thrust bearing elastomeric oil tank as claimed in claim 4, wherein: A plurality of through holes (114) are uniformly arranged on the flange (116), the upper end of the through hole (114) is provided with a counterbore (117), the upper end of the guide rod (130) is provided with a boss (131), the guide rod (130) is inserted into the through hole (114), and the boss (131) is located in the counterbore (117).

6. A hydro-generator thrust bearing elastomeric oil tank according to claim 3 or 4 or 5, wherein: The guide rod (130) is provided with an elastic body (140) between adjacent supporting rings (113).

7. A hydro-generator thrust bearing elastomeric oil tank as claimed in claim 6, wherein: The elastic body (140) is a spiral spring or a disc spring.

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