A new type of impact-resistant tilting pad thrust bearing
By installing a new impact-resistant and tiltable thrust bearing with elastic support in the installation chamber of the bearing seat, the axial trolling and strength failure problems caused by impact loads in high-speed rotating mechanical equipment is solved, and the effect of effectively absorbing impact loads is achieved, ensuring the safe and stable operation of the equipment.
Patent Information
- Application Number
- CN202421040537.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In high-speed rotating mechanical equipment, under special operating conditions, such as the surge of the compressor or the water hammer in the water pump, it will produce a huge impact load, causing excessive axial movement of the rotor of the mechanical equipment, and even causing component collisions and bearing seat strength failure.
A new type of impact-resistant tilt thrust bearing is designed, and by setting elastic support in the installation chamber of the bearing seat, the deformation of the elastic support under impact conditions is used to absorb impact loads and reset under impact conditions.
Effectively absorb impact loads, prevent excessive axial movement of the rotor of mechanical equipment, avoid collisions between parts and failure of bearing seat strength, and ensure safe and stable operation of the equipment.
Smart Images
Figure CN222746443U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearings, and more specifically, to a novel impact-resistant tilting pad thrust bearing. Background Art
[0002] Tilting pad thrust bearings are widely used in high-speed rotating and high-thrust load water pumps, steam turbines, fans, compressors and other equipment because they can withstand large thrust loads. There are some special working conditions in the operation of these mechanical equipment, such as compressor surge, water hammer phenomenon in the pipeline during water pump operation, etc., which will produce huge impact loads, generally several times or even dozens of times the thrust load under normal operating conditions. This impact load will cause the following consequences:
[0003] (1) The axial movement of the mechanical equipment rotor is too large, which causes the parts to collide (which is very dangerous for high-speed rotating equipment), damage the mechanical equipment and cause safety accidents;
[0004] (2) Due to impact load, the axial load supporting components of the equipment, such as bearing seats and main shafts, fail in strength and break or deform. Utility Model Content
[0005] The main purpose of the utility model is to provide a tilting pad thrust bearing with a new structure, which can withstand and absorb the impact load generated under the above-mentioned impact working conditions.
[0006] In order to solve the above technical problems, the utility model proposes a new type of impact-resistant tilting pad thrust bearing, comprising:
[0007] A bearing seat having a mounting chamber; and
[0008] A first self-balancing tilting pad thrust bearing unit, a thrust plate, a second self-balancing tilting pad thrust bearing unit and an end cover are sequentially arranged in the installation chamber from the inside to the outside; wherein, it also includes:
[0009] an elastic support, one end of which is disposed on the inner end surface of the mounting chamber and the other end of which is disposed on the first self-balancing tilting pad thrust bearing unit;
[0010] Wherein, in the impact working condition, the compression of the elastic support by the first self-balancing tilting pad thrust bearing unit will cause the elastic support to deform, thereby consuming the impact load;
[0011] In the absence of impact, the elastic support is reset.
[0012] In the above technical solution, further, the elastic support is a disc spring with a sheet-like structure.
[0013] In any of the above technical solutions, further, there are a plurality of elastic supports, which are distributed on the inner end surface of the installation chamber along the circumferential direction.
[0014] In any of the above technical solutions, further, a buffer groove is provided on the inner end surface of the installation chamber, and the elastic support is arranged in the buffer groove.
[0015] In any of the above technical solutions, further, it also includes:
[0016] A limit block is arranged in the buffer groove, and one end of the limit block abuts against the elastic support, and the other end of the limit block extends out of the buffer groove and abuts against the first self-balancing tilting pad thrust bearing unit;
[0017] Wherein, the interval between the first self-balancing tilting pad thrust bearing unit and the inner end surface of the installation chamber forms a buffer gap.
[0018] In any of the above technical solutions, further, the first self-balancing tilting pad thrust bearing unit and the second self-balancing tilting pad thrust bearing unit have the same structure, and are symmetrically arranged on both sides of the thrust plate.
[0019] Beneficial effects: Compared with the prior art, by setting up elastic supports, under normal working conditions, the thrust load is within the design given value or range, and the elastic deformation produced by the specially designed elastic supports that match it is smaller; under impact conditions, the elastic supports deform under larger impact loads, and the damping provided by the elasticity can consume most of the impact capacity, so that the entire bearing can play a role in resisting impact loads. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is a structural schematic diagram of the utility model;
[0022] Figure 2 It is a structural schematic diagram of the utility model from another perspective;
[0023] Figure 3 It is a schematic diagram of the explosion structure of the utility model;
[0024] Figure 4 It is a schematic diagram of the internal structure of the utility model;
[0025] Figure 5 It is a schematic diagram of the internal structure of the utility model;
[0026] Figure 6 yes Figure 4 The enlarged view of point A in the middle;
[0027] Figure 7 It is a schematic diagram of the state structure of the elastic support of the utility model under the condition of no impact load;
[0028] Figure 8 It is a schematic diagram of the state structure of the elastic support of the utility model under the condition of impact load.
[0029] The following are the descriptions of the reference numerals:
[0030] 100, bearing seat; 110, mounting chamber; 120, buffer groove; 200, first self-balancing tilting pad thrust bearing unit; 300, thrust plate; 400, second self-balancing tilting pad thrust bearing unit; 500, end cover; 600, elastic support; 700, limit block; H, buffer gap. DETAILED DESCRIPTION
[0031] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0032] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.
[0033] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes 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 meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0036] The utility model provides a novel impact-resistant tilting pad thrust bearing to solve the problem that some parts inside mechanical equipment are damaged due to strong thrust loads under some special working conditions.
[0037] The novel bearing of the present application is described in detail through the following embodiments.
[0038] Embodiment 1:
[0039] like Figure 1-Figure 5 As shown, in this embodiment, the bearing comprises: a bearing seat 100 having a mounting chamber 110; and a first self-balancing tilting pad thrust bearing unit 200, a thrust plate 300, a second self-balancing tilting pad thrust bearing unit 400 and an end cover 500 which are sequentially arranged in the mounting chamber 110 from inside to outside;
[0040] The first self-balancing tilting pad thrust bearing unit 200 and the second self-balancing tilting pad thrust bearing unit 400 have the same structure, and are symmetrically arranged on both sides of the thrust plate 300 .
[0041] During the operation of mechanical equipment, under some special working conditions, such as surge of the compressor, water hammer phenomenon in the pipeline during the operation of the water pump, etc., a huge impact load will be generated. The impact load will cause the thrust plate 300 to apply thrust to the first self-balancing tilting pad thrust bearing unit 200 and the second self-balancing tilting pad thrust bearing unit 400. Since the thrust cannot be absorbed, it is not only easy to cause axial movement of the equipment rotor, but also cause axial load support components, such as the bearing seat 100 and the main shaft, to fail in strength and break or deform.
[0042] For this reason, Figure 3-Figure 6 As shown, the structure designed to absorb impact loads is that the bearing further includes: an elastic support 600, one end of which is arranged on the inner end surface of the mounting chamber 110, and the other end is arranged on the first self-balancing tilting pad thrust bearing unit 200;
[0043] In the impact condition, the squeezing of the elastic support 600 by the first self-balancing tilting pad thrust bearing unit 200 will cause the elastic support 600 to deform, thereby consuming the impact load; in the non-impact condition, the elastic support 600 is reset.
[0044] like Figure 7 As shown, under normal working conditions, the thrust load is within the design given value or range, and the elastic deformation of the elastic support 600 specially designed to match it is small; Figure 8 As shown, in an impact condition, the elastic support 600 deforms under a large impact load, and the damping provided by the elasticity can consume most of the impact capacity, so that the entire bearing can play a role in resisting the impact load.
[0045] It should be noted that, for the convenience of installation and design, a buffer groove 120 is provided on the inner end surface of the installation chamber 110, and the elastic support 600 is arranged in the buffer groove 120. The elastic support 600 is a disc spring with a sheet structure. Compared with other conventional elastic support structures, the disc spring is not only small in structure, but also can provide better damping (elastic force) to absorb impact.
[0046] The specific structure of the first self-balancing tilting pad thrust bearing unit 200 and the second self-balancing tilting pad thrust bearing unit 400 is relatively conventional prior art, and their structure and shape can also be known from the accompanying drawings. Since they are not the invention points of the present application, they will not be described in detail.
[0047] For optimization, in order to ensure uniform force, a plurality of buffer grooves 120 are installed on the inner end surface of the chamber 110 and are evenly distributed along its circumferential direction, while the elastic supports 600 are consistent with the number of the buffer grooves 120 and are installed in each buffer groove 120 one by one.
[0048] Embodiment 2:
[0049] This embodiment is a further improvement made on the basis of the first embodiment.
[0050] In this embodiment, if Figure 3-Figure 8 As shown, the bearing also includes:
[0051] The limit block 700 is disposed in the buffer groove 120, and one end of the limit block 700 abuts against the elastic support 600, and the other end extends out of the buffer groove 120 and abuts against the first self-balancing tilting pad thrust bearing unit 200;
[0052] The interval between the first self-balancing tilting pad thrust bearing unit 200 and the inner end surface of the mounting chamber 110 forms a buffer gap.
[0053] In the present technical solution, after a buffer groove 120 is opened on the inner end face of the installation chamber 110, although it facilitates the installation of the butterfly spring, the deformation amount that the butterfly spring can produce is limited too small, that is, the depth of the buffer groove 120 is set very small, and the part of the butterfly spring in the buffer groove 120 cannot be further squeezed and deformed, resulting in limited ability to absorb impact loads. For this purpose, a limit block 700 is designed, and the depth of the buffer groove 120 can be set to be able to completely embed the butterfly spring therein, and can also accommodate part of the limit block 700, and the part of the limit block 700 extending out of the buffer groove 120 is against the first self-balancing tilting pad thrust bearing unit 200.
[0054] It should be noted that, during the design, the length of the protruding part of the limit block 700, that is, the given gap between the limit block 700 and the first self-balancing tilting pad thrust bearing unit 200 is designed according to actual needs. The gap is a buffer gap, that is, the corresponding deformation amount of the butterfly spring.
[0055] Under normal working conditions, the thrust load acts on the butterfly spring, the elastic deformation of the butterfly spring is small, and the buffer gap between the limit block 700 and the first self-balancing tilting pad thrust bearing unit 200 changes slightly;
[0056] Under impact conditions, the butterfly spring deforms under a large impact load, and the damping provided by the deformation can consume most of the impact capacity. When the deformation of the butterfly spring is greater than the pre-designed buffer gap, the bearing seat 100 can limit the axial movement of the rotor of the entire mechanical equipment. At the same time, the limit block 700 will also move with the butterfly spring. Because the space between the limit block 700 and the butterfly spring is filled with lubricating oil, the stiffness and damping of the lubricating oil under impact load are nonlinear. Therefore, under impact load, the lubricating oil in the buffer groove 120 can provide additional great damping, which can consume the impact energy together with the damping provided by the butterfly spring, thereby ensuring the safe use of the mechanical equipment.
[0057] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A new type of impact-resistant tilting pad thrust bearing, comprising: A bearing seat (100) having a mounting chamber (110); as well as A first self-balancing tilting pad thrust bearing unit (200), a thrust plate (300), a second self-balancing tilting pad thrust bearing unit (400) and an end cover (500) are sequentially arranged in the installation chamber (110) from the inside to the outside; characterized in that it also includes: an elastic support (600), one end of which is arranged on the inner end surface of the installation chamber (110), and the other end of which is arranged on the first self-balancing tilting pad thrust bearing unit (200); Wherein, in an impact condition, the compression of the elastic support (600) by the first self-balancing tilting pad thrust bearing unit (200) causes the elastic support (600) to deform, thereby consuming the impact load; In the absence of impact, the elastic support (600) is reset.
2. A novel impact-resistant tilting pad thrust bearing as claimed in claim 1, characterized in that: The elastic support (600) is a disc spring with a sheet-like structure.
3. A novel impact-resistant tilting pad thrust bearing as claimed in claim 2, characterized in that: There are a plurality of elastic supports (600), which are distributed on the inner end surface of the installation chamber (110) along the circumferential direction.
4. A novel impact-resistant tilting pad thrust bearing as claimed in claim 2, characterized in that: A buffer groove (120) is provided on the inner end surface of the installation chamber (110), and the elastic support (600) is arranged in the buffer groove (120).
5. A novel impact-resistant tilting pad thrust bearing as claimed in claim 4, characterized in that: Also includes: A limit block (700) is arranged in the buffer groove (120), and one end of the limit block (700) abuts against the elastic support (600), and the other end extends out of the buffer groove (120) and abuts against the first self-balancing tilting pad thrust bearing unit (200); Wherein, the interval between the first self-balancing tilting pad thrust bearing unit (200) and the inner end surface of the installation chamber (110) forms a buffer gap.
6. A novel impact-resistant tilting pad thrust bearing according to any one of claims 1 to 5, characterized in that: The first self-balancing tilting pad thrust bearing unit (200) and the second self-balancing tilting pad thrust bearing unit (400) have the same structure and are symmetrically arranged on both sides of the thrust plate (300).