Thrust bearing limiting structure

Abstract

The utility model relates to the technical field of vertical thrust bearings, in particular to a thrust bearing limiting structure which comprises a thrust bearing and a box body, a circumferential limiting structure and an axial limiting structure which are used for limiting the thrust bearing in the circumferential direction and the axial direction respectively are arranged between the thrust bearing and the box body, the circumferential limiting structure corresponds to thrust discs one to one, and the axial limiting structure corresponds to the thrust discs one to one. The box body, the thrust disc and the thrust pad are fixedly connected into a whole; the bottoms of the two ends of the thrust pads protrude to form limiting bosses, every two adjacent thrust pads are paired, the axial limiting structures are located between the two paired thrust pads, and the thrust pads on the two sides are axially limited through the limiting bosses. By implementing the scheme, the problems that an existing thrust bearing structure is complex in installation and the appearance size of a speed reducer is large can be solved.

Description

Technical Field

[0001] This utility model relates to the field of vertical thrust bearing technology, and specifically to a thrust bearing limiting structure. Background Technology

[0002] Currently, the reducers of vertical mills generally use grouped thrust bearings, which are typically composed of multiple thrust bearing pads. These thrust bearings bear the load of the vertical mill by forming a dynamic (or static) oil film between their surfaces and the grinding disc. Since the grinding disc operates in a state of continuous oscillation and rotation, and the thrust bearings must remain relatively stationary to ensure stable operation of the grinding disc, circumferential and axial limits must be imposed on the thrust bearings to ensure that the grinding disc maintains normal contact with the thrust bearings during oscillation and rotation.

[0003] A common thrust bearing axial limiting structure is achieved through a radially mounted limiting plate 001 and limiting bolts 002, while circumferential limiting is accomplished through a pin 003, as shown in the attached diagram. Figure 1 As shown, part A is a circumferential limiting structure, and part B is a circumferential limiting structure. The thrust plate 2 is installed on the housing 1 at equal intervals along the circumference, and the thrust bearings 3 are installed on the thrust plate 2 at equal intervals along the circumference. The thrust bearings 3 are fan-shaped, and a limiting plate is provided radially on the inner arc surface. Each thrust bearing 3 is axially limited by the limiting plate 001. Since bearings, gear rings, and other components are installed in the central area enclosed by the thrust bearings 3, the overall size and weight of the reducer increase, leading to a decrease in the power density of the reducer and energy waste. Furthermore, from the attached... Figure 1 As can be seen, the space between the housing 1 and the thrust plate 2 is very narrow, which restricts the operation of the limiting plate 001 and the limiting bolt 002 and makes installation difficult. In addition, the limiting bolt 002 used for positioning cannot be a general-purpose part due to its special design requirements and must be custom-made, which increases the overall manufacturing cost of the equipment.

[0004] Therefore, in view of the above problems, this application provides a novel thrust bearing limiting structure, which can not only effectively limit the thrust bearing, but also simplify installation and reduce the overall size of the reducer. Utility Model Content

[0005] The present invention aims to provide a thrust bearing limiting structure, which solves the problems of high installation difficulty and large size of the reducer caused by the existing limiting structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A thrust bearing limiting structure includes a thrust bearing and a housing. Between the two are a circumferential limiting structure and an axial limiting structure for limiting the thrust bearing circumferentially and axially, respectively. The circumferential limiting structure corresponds one-to-one with the thrust disc and connects and fixes the housing, thrust disc, and thrust bearing into a whole. The bottom of both ends of the thrust bearing protrudes to form limiting bosses. Adjacent thrust bearings are paired up. The axial limiting structure is located between the paired thrust bearings and limits the thrust bearings on both sides axially through the limiting bosses.

[0008] Furthermore, the axial limiting structure includes a T-shaped limiting post, the transverse structure of which covers the limiting bosses of two adjacent thrust bearings. The limiting post is provided with a threaded through hole, and the housing is provided with a threaded mounting hole corresponding to the threaded through hole. An axial limiting bolt is provided in the threaded through hole and the threaded mounting hole.

[0009] Furthermore, the circumferential limiting structure includes a circumferential limiting bolt, and the thrust plate and the housing are provided with threaded holes that cooperate with the circumferential limiting bolt. The threaded holes penetrate the thrust plate along the thickness, and the bottom of the thrust pad has a fixing hole corresponding to the threaded hole. The head of the circumferential limiting bolt passes through the thrust pad and extends into the fixing hole.

[0010] Furthermore, a fixing structure is provided between the thrust pad and the thrust plate. The fixing structure includes a ball head support pad and an adjusting shim. The spherical structure of the ball head support pad contacts the adjusting shim. A fixing bolt is provided between the ball head support pad and the thrust pad. The bottom of the thrust pad is provided with a first mounting groove for accommodating the ball head support pad, and the top of the thrust plate is provided with a receiving groove for accommodating the adjusting shim.

[0011] Furthermore, the top of the thrust plate has a second mounting groove, which is located above and communicates with the receiving groove. The second mounting groove and the first mounting groove together receive the ball head support pad.

[0012] Furthermore, the circumferential limiting structure includes a pair of circumferential limiting bolts, which are located on both sides of the fixed structure.

[0013] Compared to existing technologies, the advantages of this solution are:

[0014] 1. Enhance installation convenience and improve installation efficiency: The existing thrust bearing limiting structure is too complex and the installation position is not reasonable. The thrust pads of the existing thrust bearing are evenly distributed around the circumference, and each thrust pad has a limiting plate for axial limiting, which is fixed by multiple bolts. The large number of bolts and the narrow installation space make the installation of this axial limiting structure very laborious. The existing circumferential limiting structure is also relatively complex, and its connection and fixing functions rely on pins and screws respectively, which occupy a lot of space.

[0015] Based on the above analysis, this solution optimizes the circumferential and axial limiting structures of the thrust bearing. Firstly, regarding the circumferential limiting structure, the limiting method has been improved by eliminating the original pin and designing a circumferential limiting bolt. This bolt has a longer head, serving a dual purpose: the lower part is used to fix the thrust plate, while the head acts as a pin to circumferentially limit the thrust bearing. The structure is now more compact, simplifying the installation process. Secondly, after structural optimization, adjacent thrust bearings are paired and share a single axial limiting structure, meaning only one axial limiting bolt is needed for fixation. This reduces the total number of bolts used in the thrust bearing, significantly improving installation efficiency and enhancing overall installation convenience.

[0016] 2. Improve Energy Density: Existing thrust bearing limiting structures are overly complex and their installation positions are not ideal, resulting in larger and heavier reducers with lower power density and complicated installation and maintenance. The inventors analyzed the existing thrust bearing limiting structure from a detailed structural perspective. The limiting plate is installed on the inner ring of the thrust bearing pad. To avoid obstructing the bearing gear ring and other components in the middle, the distribution circumference of the thrust bearing pad needs to be expanded outwards, leading to a larger and heavier reducer, which in turn reduces power density.

[0017] This solution changes the position and method of axial limiting, eliminating the space-consuming and complex limiting plate. Bolts are used to directly fix the thrust bearing. The circumference formed by the thrust bearing can be divided into inner, middle, and outer rings according to its position. The limiting position is changed from the inner ring to the middle ring. By forming limiting bosses at both ends of the thrust bearing and cooperating with the axial limiting structure, the overall structure is tightened towards the center, and the external size of the reducer can also be reduced. Compared with the original structure, the energy density is increased by about 10% after using this solution.

[0018] 3. Reduced number of overall structural components and lower manufacturing costs: Compared with the existing thrust bearing limiting structure, the number of components used for axial and circumferential limiting in this solution is significantly reduced, and the axial limiting does not require a limiting plate, thus reducing the overall manufacturing cost. Attached Figure Description

[0019] Figure 1 This is a thrust bearing limiting structure based on existing technology.

[0020] Figure 2 This is a partial cross-sectional view of an embodiment of the present utility model.

[0021] Figure 3 This is a top view of an embodiment of the present utility model.

[0022] Figure 4 for Figure 2 A magnified view of part C.

[0023] Figure 5 for Figure 2 A magnified view of part D. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] The reference numerals in the accompanying drawings include: limiting plate 001, limiting bolt 002, pin 003, housing 1, thrust plate 2, thrust bearing 3, limiting boss 31, circumferential limiting structure 4, circumferential limiting bolt 41, threaded hole 42, fixing hole 43, axial limiting structure 5, limiting post 51, threaded through hole 52, threaded mounting hole 53, axial limiting bolt 54, fixing structure 6, ball head support pad 61, adjusting shim 62, first mounting groove 63, second mounting groove 64, receiving groove 65, and fixing bolt 66.

[0026] Example 1 is basically as shown in the appendix. Figure 2-5 As shown:

[0027] like Figure 2 , Figure 3 As shown, a thrust bearing limiting structure includes a thrust bearing and a housing 1. Between the two are provided a circumferential limiting structure 4 and an axial limiting structure 5 for circumferential and axial limiting of the thrust bearing, respectively. The circumferential limiting structure 4 corresponds one-to-one with the thrust plate 2 and connects and fixes the housing 1, the thrust plate 2 and the thrust bearing 3 into a whole. The bottom of both ends of the thrust bearing 3 protrudes to form limiting bosses 31. Adjacent thrust bearings 3 are paired up. The axial limiting structure 5 is located between the paired thrust bearings 3 and limits the thrust bearings 3 on both sides axially through the limiting bosses 31.

[0028] like Figure 2 , Figure 5 As shown, a fixing structure 6 is provided between the thrust bearing 3 and the thrust plate 2. The fixing structure 6 includes a ball head support pad 61 and an adjusting shim 62. The spherical structure of the ball head support pad 61 contacts the adjusting shim 62. A fixing bolt 66 is provided between the ball head support pad 61 and the thrust bearing 3. The bottom of the thrust bearing 3 is provided with a first mounting groove 63 to accommodate the ball head support pad 61, and the top of the thrust plate 2 is provided with a receiving groove 65 to accommodate the adjusting shim 62. The top of the thrust plate 2 has a second mounting groove 64, which is located above and communicates with the receiving groove 65. The second mounting groove 64 and the first mounting groove 63 together accommodate the ball head support pad 61.

[0029] like Figure 2 , Figure 4 The axial limiting structure 5 shown includes a T-shaped limiting post 51. The transverse structure of the limiting post 51 covers the limiting bosses 31 of the two adjacent thrust pads 3. The limiting post 51 is provided with a threaded through hole 52. The housing 1 is provided with a threaded mounting hole 53 corresponding to the threaded through hole 52. The threaded through hole 52 and the threaded mounting hole 53 are provided with axial limiting bolts 54.

[0030] The circumferential limiting structure 4 includes a circumferential limiting bolt 41. The thrust plate 2 and the housing 1 are provided with threaded holes 42 that mate with the circumferential limiting bolt 41. The threaded holes 42 penetrate the thrust plate 2 along its thickness. The bottom of the thrust bearing 3 has a fixing hole 43 corresponding to the threaded hole 42. The head of the circumferential limiting bolt 41 passes through the thrust bearing 3 and extends into the fixing hole 43. Preferably, the circumferential limiting structure 4 includes a pair of circumferential limiting bolts 41, located on both sides of the fixing structure 6, thus making the connection between the housing 1, the thrust plate 2, and the thrust bearing 3 more stable.

[0031] Specific installation method:

[0032] First, the thrust plate 2 is fixed to the housing 1 using the circumferential limiting bolt 41. Then, the adjusting shim 62 is installed in the receiving groove 65 of the thrust plate 2. Next, the ball head support pad 61 is bolted into the first mounting groove 63 at the bottom of the thrust bearing 3. One end of the spherical structure of the ball head support pad 61 is placed into the second mounting groove 64 for initial positioning. At the same time, the head of the circumferential limiting bolt 4122 is inserted into the fixing hole 43 at the bottom of the thrust bearing 3 to complete the circumferential limiting of the thrust bearing. Then, the limiting pin 51 is placed between the two pairs of thrust bearings 3, aligning the threaded through hole 52 in the limiting pin 51 with the threaded mounting hole 53 on the housing 1. The axial limiting bolt 54 is then inserted and tightened to complete the axial limiting.

[0033] The above method achieves circumferential and axial positioning of the thrust bearing. By eliminating the original limiting plate structure located on the inner ring, the circumferential limiting structure 4 and axial limiting structure 5 designed in this scheme have changed their original layout. The entire structure can be tightened towards the shaft center, and the size of the reducer housing can also be reduced accordingly, resulting in a decrease in overall weight and thus an increase in power density (by approximately 10%). Furthermore, compared to the cumbersome installation of the original limiting plate, the installation position of the limiting post 51 is larger and easier to operate, and the number of bolts required for fixing is significantly reduced, resulting in a significant improvement in overall installation efficiency.

[0034] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A thrust bearing limiting structure, comprising a thrust bearing and a housing, wherein a circumferential limiting structure and an axial limiting structure are provided between the two for respectively limiting the thrust bearing circumferentially and axially, characterized in that: The circumferential limiting structure corresponds one-to-one with the thrust plate and connects and fixes the housing, thrust plate and thrust bearing into one unit; the bottom of both ends of the thrust bearing protrudes to form limiting bosses, and adjacent thrust bearings are paired up. The axial limiting structure is located between the paired thrust bearings and limits the thrust bearings on both sides axially through the limiting bosses.

2. The thrust bearing limiting structure according to claim 1, characterized in that: The axial limiting structure includes a T-shaped limiting post. The transverse structure of the limiting post covers the limiting bosses of two adjacent thrust pads. The limiting post is provided with a threaded through hole. The housing is provided with a threaded mounting hole corresponding to the threaded through hole. An axial limiting bolt is provided in the threaded through hole and the threaded mounting hole.

3. The thrust bearing limiting structure according to claim 1, characterized in that: The circumferential limiting structure includes a circumferential limiting bolt, and the thrust plate and the housing are provided with threaded holes that cooperate with the circumferential limiting bolt. The threaded holes penetrate the thrust plate along the thickness, and the bottom of the thrust pad has a fixing hole corresponding to the threaded hole. The head of the circumferential limiting bolt passes through the thrust pad and extends into the fixing hole.

4. A thrust bearing limiting structure according to any one of claims 1-3, characterized in that: A fixing structure is provided between the thrust pad and the thrust plate. The fixing structure includes a ball head support pad and an adjusting shim. The spherical structure of the ball head support pad contacts the adjusting shim. A fixing bolt is provided between the ball head support pad and the thrust pad. The bottom of the thrust pad is provided with a first mounting groove to accommodate the ball head support pad, and the top of the thrust plate is provided with a receiving groove to accommodate the adjusting shim.

5. A thrust bearing limiting structure according to claim 4, characterized in that: The top of the thrust plate has a second mounting groove, which is located above and connected to the receiving groove. The second mounting groove and the first mounting groove together accommodate the ball head support pad.

6. The thrust bearing limiting structure according to claim 5, characterized in that: The circumferential limiting structure includes a pair of circumferential limiting bolts, which are located on both sides of the fixed structure.

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