Knuckle bearing fixing and limiting structure

Abstract

The invention provides a joint bearing fixing and limiting structure, and aims to overcome the defects caused by a joint bearing and connecting rod fixing and limiting mode in the prior art. The invention relates to the technical field of gas turbines, which is characterized in that a check ring similar to a groove in shape is mounted in a connecting rod clamping groove in a manner of locally grooving a connecting rod, then the check ring is rotated through a process hole in the check ring, so that a protruding part of the check ring is screwed into the lower part of a convex shoulder of the connecting rod, and then the circumferential position of the check ring is fixed through a screw or a pin; therefore, the knuckle bearing is fixed, the axial position of the knuckle bearing is limited, the knuckle bearing is firmly installed in the connecting rod, and therefore the structure can bear large loads and has good stability and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines, and particularly relates to a fixed limit structure for a spherical plain bearing. Background Art

[0002] In a gas turbine, the intake air volume of a compressor is usually adjusted by changing the installation angle of a variable guide vane, so as to adjust the power of the gas turbine and prevent the compressor from surging. The rotation of the variable guide vane usually adopts a driving ring to connect a plurality of connecting rod structures, and the most critical part in the connecting rod mechanism is the spherical plain bearing. The installation quality of the spherical plain bearing directly affects the reliability and performance of the variable guide vane driving mechanism.

[0003] There are two existing ways to fix and limit the spherical plain bearing and the connecting rod. One is the way of punching and deforming through a V-shaped groove, as Figure 11 shown. Since this way is achieved by deforming metal materials, the connection is not firm enough. If cracks appear during punching and riveting, it is easy to fail under a large axial force, and when replacing the bearing, it must be destructively removed, which is time-consuming and laborious. The other is achieved by using a circlip for hole. However, since the installation process hole protrusion of the circlip occupies a large space, it affects the rotation angle of the spherical plain bearing, and since the groove of the circlip is relatively shallow, it is easy to fail. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the present invention provides a fixed limit structure for a spherical plain bearing. This structure is simple, convenient for disassembly, installation and maintenance, can bear a large load, and does not limit the free rotation of the spherical plain bearing, with innovation and ease of use.

[0005] To achieve the purpose of the present invention, the technical solution adopted is: A fixed limit structure for a spherical plain bearing, comprising: an inner ring 1, an outer ring 2, a connecting rod 3, a retaining ring 4, and a positioning pin 5; wherein, one end of the connecting rod 3 is provided with a boss 3D, the other end of the connecting rod 3 is provided with a clamping groove 3E, a shoulder 3B and a groove 3A; a pin hole 3C is provided on the shoulder 3B of the connecting rod 3; the retaining ring 4 is provided with a protruding part 4A and a recessed part 4B; a pin hole 4C is provided on the protruding part 4A; the inner ring 1, the outer ring 2 and the connecting rod 3 of the spherical plain bearing are concentrically placed in sequence from inside to outside, the retaining ring 4 is concentrically placed in the clamping groove 3E of the connecting rod 3, and the protruding part 4A of the retaining ring 4 is clamped under the shoulder 3B of the connecting rod 3.

[0006] Preferably, the pin hole 4C on the protruding part 4A of the retaining ring 4 is aligned with the pin hole 3C on the shoulder 3B of the connecting rod 3, and the positioning pin 5 is placed into the pin hole 4C and the pin hole 3C.

[0007] Preferably, the retaining ring 4 is provided with a process hole 4D.

[0008] Preferably, the number of the process holes 4D is more than 2.

[0009] Preferably, the shoulders 3B and grooves 3A of the connecting rod 3 are circumferentially evenly distributed around the axis, the number of shoulders 3B is greater than 2, and the number of grooves 3A is greater than 2.

[0010] Preferably, the protruding parts 4A and recessed parts 4B of the retaining ring 4 are circumferentially evenly distributed around the axis, the number of protruding parts 4A is greater than 2, and the number of recessed parts 4B is greater than 2.

[0011] Preferably, the inner diameter of the boss 3D is smaller than the outer diameter of the outer ring 2, and the boss 3D limits the axial position of one side of the outer ring 2.

[0012] Preferably, the inner diameter of the retaining ring 4 is smaller than the outer diameter of the outer ring 2, and the thickness of the retaining ring 4 is smaller than the height of the card slot 3E.

[0013] Preferably, the width of the protruding part 4A of the retaining ring 4 is smaller than the width of the groove 3A of the connecting rod 3.

[0014] Preferably, the outer diameter of the protruding part 4A of the retaining ring 4 is smaller than the inner diameter of the groove 3A of the connecting rod 3 and larger than the inner diameter of the shoulder 3B of the connecting rod 3, and the outer diameter of the recessed part 4B of the retaining ring 4 is smaller than the inner diameter of the shoulder 3B of the connecting rod 3.

[0015] Preferably, the inner ring (1), outer ring (2), connecting rod (3), and retaining ring (4) are of an annular structure.

[0016] Adopting the above technical solution, the following beneficial effects are achieved: In the present invention, by locally grooving the connecting rod, a retaining ring similar in shape to the groove is installed in the card slot of the connecting rod, and then through the process hole on the retaining ring, the retaining ring is rotated so that the protruding part of the retaining ring is screwed under the shoulder of the connecting rod, and then the circumferential position of the retaining ring is fixed by screws or pins, thereby fixing the spherical plain bearing and restricting the axial position of the spherical plain bearing, firmly installing the spherical plain bearing in the connecting rod. Since the overlapping part of the retaining ring and the connecting rod has a large cross-sectional area, this structure can withstand large loads and has good stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the position of the spherical plain bearing fixing and limiting structure components; Figure 2 It is a top view of the spherical plain bearing fixing and limiting structure; Figure 3 It is an axonometric view of the connecting rod structure; Figure 4 It is a top view of the connecting rod structure; Figure 5 It is an A-A cross-sectional view of the connecting rod structure; Figure 6 It is a cross-sectional view of the spherical plain bearing fixing and limiting structure; Figure 7 Side view of snap ring structure Figure 8 Top view of snap ring structure Figure 9 Side view of spherical plain bearing fixing and limiting structure Figure 10 Top view of spherical plain bearing fixing and limiting structure Figure 11 Schematic diagram of V-groove punching and riveting deformation method in the prior art In the figure: inner ring 1, outer ring 2, connecting rod 3, snap ring 4, positioning pin 5, groove 3A, shoulder 3B, pin hole 3C, boss 3D, card slot 3E, protruding part 4A, recessed part 4B, pin hole 4C, process hole 4D Specific embodiments

[0018] To make the above objects, features and advantages of the present invention more obvious and understandable, the following further details the specific embodiments of the present invention with reference to the accompanying drawings

[0019] Embodiment 1 1. A spherical plain bearing fixing and limiting structure, comprising: inner ring 1, outer ring 2, connecting rod 3, snap ring 4, positioning pin 5

[0020] As shown in Figure 3 , Figure 4 , Figure 5 and Figure 6 : One end of the connecting rod 3 has a boss 3D, and the inner diameter 3K of the boss 3D is smaller than the outer diameter 2K of the outer ring 2 of the spherical plain bearing, but does not affect the free rotation of the spherical plain bearing

[0021] After the inner ring 1 and the outer ring 2 of the spherical plain bearing are installed into the round hole of the connecting rod 3, the boss 3D limits the axial position of one side of the outer ring 2

[0022] As shown in Figure 3 , Figure 4 and Figure 5 : A card slot 3E, a shoulder 3B and a groove 3A are provided at the other end of the boss 3D of the connecting rod 3

[0023] The shoulder 3B and the groove 3A are circumferentially evenly distributed around the axis, and the number thereof is 3

[0024] A pin hole 3C is provided on the shoulder 3B of the connecting rod 3, and the pin hole 3C is arranged on any one of the shoulders 3B

[0025] As shown in Figure 7 and Figure 8 : The retaining ring 4 is of a circular ring structure, and the inner diameter 4K of its inner circle is smaller than the outer diameter 2K of the outer ring 2 of the spherical plain bearing, but it does not affect the free rotation of the spherical plain bearing.

[0026] The thickness of the retaining ring 4 is 4M, and the height of the card slot 3E of the connecting rod 3 is 3M. The thickness 4M of the retaining ring 4 is smaller than the height 3M of the card slot 3E of the connecting rod 3.

[0027] The retaining ring 4 is provided with a protruding part 4A and a recessed part 4B. The protruding part 4A and the recessed part 4B are circumferentially evenly distributed around the axis, and the number thereof is 2, 3, up to N, and is the same as the number of the shoulders 3B of the connecting rod 3.

[0028] The width of the groove 3A is 3H, the width of the protruding part 4A is 4H, and the width 4H of the protruding part 4A is smaller than the width 3H of the groove 3A of the connecting rod 3.

[0029] The inner diameter of the groove 3A is 3F, the outer diameter of the protruding part 4A is 4F, and the outer diameter 4F of the protruding part 4A is smaller than the inner diameter 3F of the groove 3A of the connecting rod 3, but larger than the inner diameter 3G of the shoulder 3B of the connecting rod 3.

[0030] The outer diameter of the recessed part 4B is 4G, the inner diameter of the shoulder 3B is 3G, and the outer diameter 4G of the recessed part 4B is smaller than the inner diameter 3G of the shoulder 3B of the connecting rod 3.

[0031] A pin hole 4C is provided on the protruding part 4A, and the pin hole 4C is arranged on any one of the protruding parts 4A.

[0032] A process hole 4D is provided on the retaining ring 4, and the number of the process holes 4D is 3.

[0033] 2. The installation steps of the spherical plain bearing fixed limit structure are as follows: (1) As Figure 1 shown, the connecting rod 3, the inner ring 1 and the outer ring 2 of the spherical plain bearing, and the retaining ring 4 are concentrically placed. The protruding part 4A of the retaining ring 4 is aligned with the groove 3A of the connecting rod 3. The inner ring 1 and the outer ring 2 of the spherical plain bearing are placed into the connecting rod 3, and the retaining ring 4 is placed into the card slot 3E of the connecting rod 3, as Figure 2 shown.

[0034] (2) Using the process hole 4D of the retaining ring 4, rotate the retaining ring 4 in the card slot 3E of the connecting rod 3 until the protruding part 4A of the retaining ring 4 is screwed under the shoulder 3B of the connecting rod 3, and the pin hole 4C of the retaining ring 4 is aligned with the pin hole 3C of the connecting rod 3.

[0035] (3) Finally, place the positioning pin 5 into the pin holes 4C and 3C, as Figure 9 and Figure 10 shown.

[0036] In the technical solution of the present invention, the connecting rod (3) is only a specific shape used to describe this patent. The actual shape can be changed in terms of its shape and size according to the needs of structural design.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention, and all of them should be covered within the scope of the claims of the present invention.

Claims

1. A fixed limit structure for a spherical plain bearing, characterized in that Including: Inner ring (1), outer ring (2), connecting rod (3), retaining ring (4), positioning pin (5); One end of the connecting rod (3) is provided with a boss (3D), and the other end of the connecting rod (3) is provided with a groove (3E), a shoulder (3B) and a recess (3A); a pin hole (3C) is provided on the shoulder (3B) of the connecting rod (3); The retaining ring (4) is provided with a protruding part (4A) and a recessed part (4B); a pin hole (4C) is provided on the protruding part (4A); The inner ring (1), outer ring (2) and connecting rod (3) of the spherical plain bearing are concentrically arranged in sequence from inside to outside. The retaining ring (4) is concentrically placed in the groove (3E) of the connecting rod (3), and the protruding part (4A) of the retaining ring (4) is clamped under the shoulder (3B) of the connecting rod (3).

2. The fixed limit structure of the spherical plain bearing according to claim 1, characterized in that: The pin hole (4C) on the protruding part (4A) of the retaining ring (4) is aligned with the pin hole (3C) on the shoulder (3B) of the connecting rod (3), and the positioning pin (5) is placed into the pin hole (4C) and the pin hole (3C).

3. The fixed limit structure of the spherical plain bearing according to claim 1, characterized in that: The retaining ring (4) is provided with a process hole (4D).

4. The fixed limit structure of the spherical plain bearing according to claim 3, characterized in that: The number of the process holes (4D) is more than 2.

5. The fixed limit structure of the spherical plain bearing according to claim 1, wherein: The shoulders (3B) and recesses (3A) of the connecting rod (3) are circumferentially uniformly distributed around the axis. The number of the shoulders (3B) is more than 2, and the number of the recesses (3A) is more than 2.

6. The fixed limit structure of the spherical plain bearing according to claim 1, characterized in that: The protruding parts (4A) and recessed parts (4B) of the retaining ring (4) are circumferentially uniformly distributed around the axis. The number of the protruding parts (4A) is more than 2, and the number of the recessed parts (4B) is more than 2.

7. The fixed limit structure of the spherical plain bearing according to claim 1, wherein: The inner diameter of the boss (3D) is smaller than the outer diameter of the outer ring (2), and the boss (3D) limits the axial position of one side of the outer ring (2).

8. The fixed limit structure of the spherical plain bearing according to claim 1, characterized in that: The inner diameter of the retaining ring (4) is smaller than the outer diameter of the outer ring (2), and the thickness of the retaining ring (4) is smaller than the height of the groove (3E).

9. The fixed limit structure of the spherical plain bearing according to claim 1, wherein: The width of the protruding part (4A) of the retaining ring (4) is smaller than the width of the recess (3A) of the connecting rod (3).

10. The fixed limit structure of the spherical plain bearing according to claim 1, characterized in that: The outer diameter of the protruding part (4A) of the retaining ring (4) is smaller than the inner diameter of the recess (3A) of the connecting rod (3) and larger than the inner diameter of the shoulder (3B) of the connecting rod (3). The outer diameter of the recessed part (4B) of the retaining ring (4) is smaller than the inner diameter of the shoulder (3B) of the connecting rod (3).

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