Double-layer thrust pad, thrust bearing and hydro-generator
By adopting double-layer thrust tile structure and guide key clamping technology in the thrust bearing of the hydrowheel generator, the complex problems of the existing structure are solved, and a simpler and more reliable design and connection effect is achieved.
Patent Information
- Application Number
- CN202421976177.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing thrust bearings of hydrowheel generators are complex in structure and it is difficult to achieve a simple and reliable design.
The double-layer thrust tile structure is adopted, which is connected to the first keyway through the guide key, limiting the movement of the thrust tile and simplifying the structure. Meanwhile, by providing a second keyway on the towa and bolting the guide key to the towa, the clearance is reduced and the fixation is facilitated.
The stable connection between the thrust tank and the towa is achieved, which simplifies structural design, improves reliability and ease of implementation.
Smart Images
Figure CN222863905U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic generator thrust bearings, in particular to a double-layer thrust bush, a thrust bearing and a hydraulic generator. Background Art
[0002] The bearing of the hydro-turbine generator is one of the important components of the hydro-turbine generator set. The bearing includes an upper guide bearing, a lower guide bearing and a thrust bearing. Among them, the thrust bearing adopts a double-layer thrust bearing, which is composed of a thrust bearing, a support bearing, a guide key, an inner limit block and an outer limit block. The thrust bearing is placed on the support bearing and positioned by the guide key. It can also limit the movement of the thrust bearing along the width direction of the guide key (i.e., the left and right direction). The thrust bearing and the support bearing are connected by the inner limit block and the outer limit block. The thrust bearing has a complex structure. Utility Model Content
[0003] The embodiments of the utility model provide a double-layer thrust pad, a thrust bearing and a hydro-turbine generator, which can improve the technical problem of the complicated structure of the existing thrust bearing.
[0004] In a first aspect, an embodiment of the utility model provides a double-layer thrust pad, comprising:
[0005] A thrust washer having a first keyway disposed thereon;
[0006] A support bearing is arranged below the thrust bearing and opposite to the thrust bearing;
[0007] A guide key is arranged between the thrust washer and the support washer, one end of the guide key is fixedly connected to the support washer, and the other end is arranged in the first key slot and engaged with the first key slot to limit the thrust washer from moving in a direction away from the support washer.
[0008] In the embodiment of the utility model, the upper and lower connections between the thrust washer and the support washer can be achieved by clamping the guide key with the first key slot, thereby limiting the movement of the thrust washer upward (i.e., away from the support washer) and left and right (i.e., the width direction of the guide key). The structure is simple, reliable and easy to implement.
[0009] In one embodiment, a second keyway is provided on the support bearing, the notches of the first keyway and the second keyway are arranged opposite to each other, and the guide key is arranged in the first keyway and the second keyway; and / or
[0010] The second keyway is square, and the guide key is connected to the support shoe by bolts.
[0011] In the embodiment of the utility model, by providing the second keyway on the support shoe and providing the guide key in the first keyway and the second keyway, the gap between the support shoe and the thrust shoe can be reduced, so that the support shoe can fully support the thrust shoe and the guide key can be easily replaced. By providing the second keyway in a square shape and connecting the guide key to the support shoe by bolts, the guide key can be easily installed and the guide key can be fully fixed to the support shoe.
[0012] In one embodiment, the first keyway is a trapezoidal groove, and the groove bottom width of the trapezoidal groove is greater than the groove opening width of the trapezoidal groove; and / or
[0013] The first key groove is a T-shaped groove, the groove bottom width of the first key groove is greater than the groove opening width, and the groove opening width of the first key groove is the same as the groove opening width of the second key groove.
[0014] In the embodiment of the utility model, by setting the first keyway as a trapezoidal groove and making the groove bottom width of the trapezoidal groove greater than the groove opening width of the trapezoidal groove, the guide key can be fully engaged with the first keyway, thereby limiting the upward and left-right movement of the thrust washer. By setting the first keyway as a T-shaped groove and making the groove bottom width of the first keyway greater than the groove opening width, the groove opening width of the first keyway is the same as the groove opening width of the second keyway, the guide key can be fully engaged with the first keyway, thereby limiting the upward and left-right movement of the thrust washer.
[0015] In one embodiment, the thrust washer is in a fan-shaped shape and has an inner diameter side and an outer diameter side, and the end of the thrust washer close to the inner diameter side and the end close to the outer diameter side are respectively fixedly connected to the support washer.
[0016] In the embodiment of the utility model, the movement of the thrust pad at both ends along the radial direction can be restricted by fixing the end of the thrust pad close to the inner diameter side and the end close to the outer diameter side to the support pad respectively.
[0017] In one embodiment, the first keyway extends radially along the thrust washer and penetrates the outer diameter side, the second keyway penetrates the end of the thrust washer corresponding to the outer diameter side along the radial direction of the thrust washer, one end of the guide key extends radially along the thrust washer to the outside of the outer diameter side, and a limit member is sleeved on the guide key located outside the outer diameter side, and the limit member is configured to abut against the outer diameter side of the thrust washer.
[0018] In an embodiment of the utility model, by extending the guide key to the outside of the outer diameter side of the thrust washer and sleeved with a limit piece so that the limit piece abuts against the outer diameter side of the thrust washer, the limit piece can limit the movement of the thrust washer toward its outer diameter side and the limit piece can be easily replaced.
[0019] In one embodiment, a first abutment structure is provided on the inner diameter side of the thrust washer, and a second abutment structure is provided on the end of the support washer corresponding to the inner diameter side, and the second abutment structure abuts against the first abutment structure.
[0020] In an embodiment of the utility model, by making the first abutment structure and the second abutment structure abut against each other, the thrust washer and the support washer can be fixedly connected on the inner diameter side of the thrust washer, thereby limiting the movement of the thrust washer toward its inner diameter side, and the connection method is simple in structure and reliable.
[0021] In one embodiment, one of the first abutting structure and the second abutting structure is a notch, and the other is a step, and the notch and the step are respectively arranged on a side of the thrust pad opposite to the support pad.
[0022] In the embodiment of the utility model, the thrust bearing and the support bearing can be effectively connected to each other on the inner diameter side of the thrust bearing through the notch and the step, and the structure is simple and reliable.
[0023] In one embodiment, the guide key is arranged at the middle part of the circumference of the thrust washer.
[0024] In the embodiment of the utility model, by arranging the guide key at the middle part of the circumference of the thrust washer, the connection between the thrust washer and the support washer can be achieved more stably.
[0025] In a second aspect, an embodiment of the utility model provides a thrust bearing, comprising the above-mentioned double-layer thrust pad.
[0026] In a third aspect, an embodiment of the utility model provides a hydro-generator, comprising the above-mentioned thrust bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 It is a structural schematic diagram of a double-layer thrust pad provided by an embodiment of the utility model;
[0029] Figure 2 It is a structural schematic diagram of a double-layer thrust pad provided by an embodiment of the utility model;
[0030] Figure 3 The double-layer thrust shoe edge provided by the embodiment of the utility model Figure 1 Sectional view of AA in the middle;
[0031] Figure 4 The double-layer thrust shoe edge provided by the embodiment of the utility model Figure 1 Cross-sectional view of BB.
[0032] Description of the drawings: thrust bearing -1; outer diameter side -11; inner diameter side -12; support bearing -2; guide key -3; limit piece -4; step -5. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.
[0034] See also Figures 1 to 4 In a first aspect, an embodiment of the utility model provides a double-layer thrust pad, comprising:
[0035] A thrust washer 1 having a first keyway disposed thereon;
[0036] A support washer 2 is disposed below the thrust washer 1 and is arranged opposite to the thrust washer 1;
[0037] The guide key 3 is arranged between the thrust washer 1 and the support washer 2. One end of the guide key 3 is fixedly connected to the support washer 2, and the other end is arranged in the first keyway and engaged with the first keyway to limit the thrust washer 1 from moving in a direction away from the support washer 2.
[0038] It can be understood that the thrust washer 1 and the support washer 2 are in the shape of a fan ring, and multiple thrust washer 1 and multiple support washer 2 can be respectively combined to form a circular ring. The size of the support washer 2 matches the size of the thrust washer 1. The inner diameter side 12 of the thrust washer 1 is the inner side of the circular ring, and the outer diameter side 11 of the thrust washer 1 is the outer side of the circular ring. The depth, shape and length of the first keyway can be set as needed. The shape and size of the part of the guide key 3 set in the first keyway match the first keyway, so that the two can be snapped together. The number of guide keys 3 can be set as needed.
[0039] In one embodiment, a second keyway is provided on the support bearing 2, the notches of the first keyway and the second keyway are arranged opposite to each other, and the guide key 3 is arranged in the first keyway and the second keyway.
[0040] It can be understood that the depth, shape and length of the second keyway can be set as needed. The length of the second keyway can be the same as the first keyway and they are interconnected. The length of the guide key 3 can be the same as the length of the second keyway and the first keyway and they match the shape and size of the groove formed by the second keyway and the first keyway, so that the guide key 3 is accommodated in the groove formed by the second keyway and the first keyway.
[0041] The second keyway is square, and the guide key 3 is connected to the support bearing 2 by bolts.
[0042] It can be understood that the guide key 3 is connected to the support bearing 2 via bolts, that is, the bolts can be passed through the support bearing 2 and the guide key 3, thereby achieving the connection between the two.
[0043] See also Figure 1 In one embodiment, the first keyway is a trapezoidal groove, and the bottom width of the trapezoidal groove is greater than the groove opening width of the trapezoidal groove.
[0044] It can be understood that there may be an angle of 60° between the extension direction of the two side edges of the trapezoidal groove and the notch, so as to better limit the upward and left-right movement of the thrust washer 1 .
[0045] See also Figure 2 In one embodiment, the first keyway is a T-shaped slot, the bottom width of the first keyway is greater than the slot width, and the slot width of the first keyway is the same as the slot width of the second keyway.
[0046] In one embodiment, the thrust washer 1 is in a fan-shaped shape and has an inner diameter side 12 and an outer diameter side 11 , and the end of the thrust washer 1 close to the inner diameter side 12 and the end close to the outer diameter side 11 are fixedly connected to the support washer 2 respectively.
[0047] In one embodiment, the first keyway extends radially along the thrust washer 1 and penetrates the outer diameter side 11, the second keyway penetrates the end of the support washer 2 corresponding to the outer diameter side 11 along the radial direction of the thrust washer 1, one end of the guide key 3 extends radially along the thrust washer 1 to the outside of the outer diameter side 11, and a limit member 4 is sleeved on the guide key 3 located outside the outer diameter side 11, and the limit member 4 is configured to abut against the outer diameter side 11 of the thrust washer 1.
[0048] It can be understood that the limiter 4 can be a standard nut or a non-standard nut, as long as it can limit the movement of the thrust washer 1 to the outer diameter side 11. The limiter 4 can be sleeved with the guide key 3 through a thread, that is, an external thread is integrally provided on the guide key 3. The shape and size of the part of the guide key 3 located in the first keyway and the second keyway match the groove formed by the first keyway and the second keyway, and the shape of the part of the guide key 3 extending outside the first keyway and the second keyway is circular, so as to facilitate the installation of the limiter 4.
[0049] In one embodiment, the inner diameter side 12 of the thrust washer 1 is provided with a first abutment structure, and the end of the support washer 2 corresponding to the inner diameter side 12 is provided with a second abutment structure, which abuts against the first abutment structure.
[0050] In one embodiment, one of the first abutting structure and the second abutting structure is a notch, and the other is a step 5 , and the notch and the step 5 are respectively arranged on a side of the thrust washer 1 opposite to the support washer 2 .
[0051] It can be understood that the shape and size of the notch and the step 5 can be set as needed, for example, square, trapezoidal, etc.
[0052] In one embodiment, the guide key 3 is disposed at the middle portion of the thrust washer 1 in the circumferential direction.
[0053] It can be understood that when one or an odd number of guide keys 3 are provided, a guide key 3 can be provided in the middle of the circumference of the thrust washer 1 .
[0054] In a second aspect, an embodiment of the utility model provides a thrust bearing, comprising the above-mentioned double-layer thrust pad.
[0055] In a third aspect, an embodiment of the utility model provides a hydro-generator, comprising the above-mentioned thrust bearing.
[0056] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. At the same time, for technicians in this field, according to the idea of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.
Claims
1. A double-layer thrust pad, characterized in that: include: A thrust washer having a first keyway disposed thereon; A support bearing is arranged below the thrust bearing and opposite to the thrust bearing; A guide key is arranged between the thrust washer and the support washer, one end of the guide key is fixedly connected to the support washer, and the other end is arranged in the first key slot and engaged with the first key slot to limit the thrust washer from moving in a direction away from the support washer.
2. The double-layer thrust pad according to claim 1, characterized in that: The support shoe is provided with a second keyway, the notches of the first keyway and the second keyway are arranged opposite to each other, and the guide key is arranged in the first keyway and the second keyway; and / or The second keyway is square, and the guide key is connected to the support shoe by bolts.
3. The double-layer thrust pad according to claim 2, characterized in that: The first keyway is a trapezoidal groove, the bottom width of the trapezoidal groove is greater than the slot width of the trapezoidal groove; and / or The first key groove is a T-shaped groove, the groove bottom width of the first key groove is greater than the groove opening width, and the groove opening width of the first key groove is the same as the groove opening width of the second key groove.
4. The double-layer thrust pad according to claim 2, characterized in that: The thrust washer is in a fan-shaped shape and has an inner diameter side and an outer diameter side. The end of the thrust washer close to the inner diameter side and the end close to the outer diameter side are respectively fixedly connected to the support washer.
5. The double-layer thrust pad according to claim 4, characterized in that: The first keyway extends radially along the thrust washer and passes through the outer diameter side, the second keyway passes radially along the thrust washer and through the end of the support washer corresponding to the outer diameter side, one end of the guide key extends radially along the thrust washer to the outside of the outer diameter side, a limit member is sleeved on the guide key located outside the outer diameter side, and the limit member is configured to abut against the outer diameter side of the thrust washer.
6. The double-layer thrust pad according to claim 4, characterized in that: The inner diameter side of the thrust washer is provided with a first abutment structure, and the end of the support washer corresponding to the inner diameter side is provided with a second abutment structure, which abuts against the first abutment structure.
7. The double-layer thrust pad according to claim 6, characterized in that: One of the first abutting structure and the second abutting structure is a notch, and the other is a step. The notch and the step are respectively arranged on a side of the thrust pad opposite to the support pad.
8. The double-layer thrust pad according to claim 1, characterized in that: The guide key is arranged at the middle part of the circumference of the thrust washer.
9. A thrust bearing, characterized in that: It comprises a double-layer thrust washer as described in any one of claims 1 to 8.
10. A hydro-generator, characterized in that: Comprising the thrust bearing as claimed in claim 9.