An adjustable compression force axial stop locking structure and method

Abstract

The application relates to the technical field of aero-engines, in particular to an axial limiting and locking structure with adjustable compression force and a method. The axial limiting and locking structure comprises a shell and a locking ring. The shell is provided with an open left-end accommodating cavity, a target part is installed in the accommodating cavity, and an internal thread is arranged on the inner wall of the accommodating cavity mouth of the shell. An external thread is arranged on the outer circumferential surface of the locking ring. The locking ring is screwed on the internal thread of the accommodating cavity mouth of the shell through the external thread. The axial length of the internal thread is greater than the thickness of the locking ring. An elastic piece is arranged between the locking ring and the target part, and the elastic piece is always in a compressed energy storage state. A pin is inserted on the locking ring, and the right end of the pin is inserted into the shell. The target part can be adjusted according to actual use requirements, and the reliable locking purpose of the adjustable compression force of the target part is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engine, in particular to an axial limiting and locking structure with adjustable compression force and method. BACKGROUND

[0002] In the turbomachinery with high-speed rotating components inside, such as aero-engine and gas turbine, in order to ensure the reliable operation of the related stator components, it is necessary to ensure that they work in a relatively static environment. This function is achieved through a locking structure. Considering different working conditions, the locking degree of the components often needs to be adjusted according to the actual situation.

[0003] The existing axial limiting and locking structure, such as the patent application with the publication number CN117266939A, discloses an axial limiting and locking structure with anti-rotation function and its locking method. The structure includes a shell and an axial limiting ring. The shell has a left-end open cavity, and a target component is installed in the cavity. A clamping groove is arranged on the cavity opening of the shell. A notch is arranged on the axial limiting ring. The axial limiting ring axially compresses the target component in the cavity of the shell. A circumferential locking and adjusting device is arranged at the notch, which is used to separate the axial limiting ring and make it clamped in the clamping groove of the shell opening.

[0004] However, the above-mentioned existing axial limiting and locking structure directly abuts the target component with the axial limiting ring for axial compression, and the axial limiting ring is clamped in the clamping groove of the shell opening. Therefore, if the existing limiting and locking structure is used, the size of the axial compression force cannot be adjusted when the target component is axially compressed, and the requirement of adjustable compression force of the target component cannot be met. SUMMARY

[0005] The main purpose of the present application is to provide an axial limiting and locking structure with adjustable compression force and method, which aims to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, on the one hand, the present application provides an axial limiting and locking structure with adjustable compression force, which includes a shell and a locking ring. The shell has a left-end open cavity, and a target component is installed in the cavity. An internal thread is arranged on the inner wall of the cavity opening of the shell. An external thread is arranged on the outer circumferential surface of the locking ring. The locking ring is screwed on the internal thread of the cavity opening of the shell through its external thread. The axial length of the internal thread is greater than the thickness of the locking ring. An elastic member is arranged between the locking ring and the target component, and the elastic member is always in a compressed and stored state. A pin is inserted into the locking ring, and the right end of the pin is inserted into the shell.

[0007] Preferably, the axial length of the internal thread on the shell is L; the thickness of the locking ring is T; and L≥2T.

[0008] Preferably, the elastic member is an end face spring.

[0009] Preferably, the mouth of the accommodating cavity of the shell is a stepped hole, the internal thread is arranged on the inner surface of the stepped hole, a stepped surface is formed between the stepped hole and the accommodating cavity, a plurality of pin holes are annularly and uniformly distributed on the stepped surface, a plurality of through holes are arranged on the locking ring, and the pin is inserted into the through hole of the locking ring and the right end of the pin is inserted into the pin hole of the shell.

[0010] Preferably, the pin, the through hole of the locking ring and the pin hole of the shell are all in interference fit.

[0011] Preferably, the number of the pins is at least three and the pins are circumferentially and uniformly distributed.

[0012] Preferably, a blind hole is arranged on the left end face of the locking ring, and the number of the blind holes is two, and the two blind holes are symmetrically distributed at 180°.

[0013] In another aspect, the application further provides a locking method of the axial limiting and locking structure with adjustable compression force, comprising the following steps:

[0014] S1, sequentially placing the target part and the elastic member in the accommodating cavity of the shell, and making the right end face of the target part abut against the bottom wall of the accommodating cavity of the shell;

[0015] S2, screwing the locking ring on the internal thread of the mouth of the accommodating cavity of the shell through the external thread of the locking ring, adjusting the screwing depth of the locking ring, adjusting the axial position of the locking ring relative to the shell, and controlling the compression deformation amount of the elastic member;

[0016] S3, after the axial position of the locking ring is adjusted in place, inserting the pin from the locking ring, and inserting the right end of the pin into the shell.

[0017] In the step S3, when the pin is assembled, the following steps are included:

[0018] S301, first, adjusting the axial position of the locking ring in place, using a hand drill to drill the locking ring and the shell, forming the through hole on the locking ring and the pin hole on the shell;

[0019] S302, using interference fit, driving the pin into the through hole on the locking ring, and then driving the pin along the axial direction so that the right end of the pin is inserted into the pin hole of the shell.

[0020] The locking method further comprises the following steps: S4, when it is necessary to adjust the axial position of the locking ring to adjust the compression deformation of the elastic member, after the pin is damaged by using the electric drill, the locking ring is rotated to adjust the circumferential position of the locking ring on the shell, and the steps S301 and S302 are repeated when the axial position of the locking ring is adjusted to the right position.

[0021] Thanks to the above technical solutions, the present application has the following advantages:

[0022] (1) The present application provides an axial position limiting and locking structure and method with adjustable compression force. Compared with the existing locking structure, the locking ring is screwed on the inner thread of the accommodating cavity mouth of the shell through the outer thread of the locking ring, and the axial length of the inner thread of the shell is greater than the thickness of the locking ring, so that the axial position of the locking ring can be adjusted within a certain range relative to the shell, and the compression deformation of the elastic member can be adjusted. In actual use, the axial position of the locking ring is adjusted according to actual needs, so that the compression deformation of the elastic member is adjusted, and the compression force of the target part can be adjusted.

[0023] (2) The axial position limiting and locking structure provided by the present application has the advantages of simple structure, adjustable compression force and reliable locking. The compression force of the target part can be adjusted according to actual use requirements, so that the target part can be reliably locked with adjustable compression force.

[0024] (3) In the present application, a pin is designed to connect between the locking ring and the shell. When the axial position of the locking ring is determined, the pin connects the locking ring and the shell in an interference fit to fix the locking ring in the circumferential direction, so that the locking ring can be prevented from rotating and loosening by itself.

[0025] (4) In the present application, after the axial position of the locking ring is adjusted to the right position, the locking ring and the shell are drilled by using the electric drill to form a through hole in the locking ring and a pin hole in the shell. This is beneficial to ensure that the hole diameters of the through hole and the pin hole are consistent, and the axes of the two holes coincide, so that the pin can be easily assembled. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to the structures shown in these drawings without creating any creative labor.

[0027] Figure 1 The schematic diagram of the axial position limiting and locking structure provided by the present application is shown in the figure.

[0028] Figure 2 The schematic diagram of the axial position limiting and locking structure provided by the present application is shown in the figure. Figure 1 The enlarged view of N in the figure.

[0029] Figure 3 is a main sectional view of the shell in the present application;

[0030] Figure 4 is a left view of the shell in the present application;

[0031] Figure 5 is a structural schematic view of the pin in the present application;

[0032] Figure 6 is a front view of the end face spring in the present application;

[0033] Figure 7 is a left view of the end face spring in the present application;

[0034] Figure 8 is a front view of the locking ring in the present application;

[0035] Figure 9 is a sectional view along D-D in the present application; Figure 8

[0036] is a sectional view along D-D in the present application; Figure 10 Figure 9 is an enlarged view of P in the present application;

[0037] Figure 11 Figure 9 is an enlarged view of Q in the present application

[0038] BRIEF DESCRIPTION OF DRAWINGS 1, shell; 1a, internal thread; 1b, stepped surface; 1c, pin hole; 2, pin; 3, elastic member; 4, locking ring; 4a, external thread; 4b, through hole; 4c, blind hole; 5, target part. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0041] ​​With reference to the drawings, in one aspect, the embodiment provides an axial position-limiting and locking structure with adjustable compression force, comprising a shell 1 and a locking ring 4. The shell 1 has a left-end open accommodating cavity, in which a target part 5 is installed. An internal thread 1a is arranged on the inner wall of the accommodating cavity of the shell 1. An external thread 4a is arranged on the outer circumferential surface of the locking ring 4. The locking ring 4 is screwed on the internal thread 1a of the accommodating cavity of the shell 1 through the external thread 4a. The axial length of the internal thread 1a is greater than the thickness of the locking ring 4. An elastic member 3 is arranged between the locking ring 4 and the target part 5, and the elastic member 3 is always in a compressed energy storage state. A pin 2 is inserted into the locking ring 4, and the right end of the pin 2 is inserted into the shell 1.

[0042] By adopting the above structure, since the locking ring 4 is screwed on the internal thread 1a of the accommodating cavity of the shell 1 through the external thread 4a, and the axial length of the internal thread 1a of the shell 1 is greater than the thickness of the locking ring 4, the locking ring 4 can be adjusted within a certain axial position range relative to the shell 1, so as to adjust the compression deformation amount of the elastic member 3. In actual use, the compression deformation amount of the elastic member 3 is adjusted by adjusting the axial position of the locking ring 4, so as to adjust the compression force of the target part 5.

[0043] With reference to the drawings, Figure 2 The axial length of the internal thread 1a of the shell 1 is L, and the thickness of the locking ring 4 is T. They satisfy L≥2T.

[0044] With reference to the drawings, Figure 6 , Figure 7 With reference to the drawings, the elastic member 3 is an end face spring. The elastic force of the end face spring is adjusted by the compression deformation amount. The compression deformation amount of the end face spring is adjusted by adjusting the axial position of the locking ring 4, so as to adjust the compression force of the target part 5. The end face spring is an elastic element with a plurality of peaks and valleys on a thin metal ring, which is widely used in occasions with small load and deformation amount, especially in structures requiring weight reduction and limited by installation space. The end face spring has a large stiffness range and strong shock absorption capacity. The stiffness can be adjusted by changing the height, width, thickness of the wave peak or the number of combined pieces. In the embodiment, the number of end face springs can be one or more.

[0045] With reference to the drawings, Figure 1 , Figure 3 and Figure 10As shown, the housing 1 is provided with a stepped hole at the opening of the accommodating cavity, and the internal thread 1a is arranged on the inner surface of the stepped hole; a stepped surface 1b is formed between the stepped hole and the accommodating cavity; a plurality of pin holes 1c are annularly and uniformly distributed on the stepped surface 1b; the locking ring 4 is provided with a plurality of through holes 4b; the pin 2 is inserted into the through hole 4b of the locking ring 4, and the right end of the pin 2 is inserted into the pin hole 1c of the housing 1. Further, the pin 2, the through hole 4b of the locking ring 4 and the pin hole 1c of the housing 1 are all in interference fit. In order to ensure the reliability of the circumferential limiting of the pin 2 to the locking ring, the number of the pin 2 is at least three, and the pins are circumferentially uniformly distributed.

[0046] In combination Figure 8 , Figure 11 As shown, the locking ring 4 is provided with a blind hole 4c at the left end surface, and the number of the blind hole 4c is two, and the two blind holes 4c are symmetrically distributed at 180°. The purpose of arranging the blind hole 4c is to facilitate the insertion of a tool into the blind hole 4c, so as to rotate the locking ring 4. Specifically, when the locking ring 4 is rotated, a cylindrical tool is inserted into the circular blind hole 4c at the outer end surface of the locking ring 4, and the operator can rotate the locking ring by holding the cylindrical tool. The depth of the blind hole 4c is t, and the thickness of the locking ring 4 is T, and t≤0.5T is satisfied.

[0047] On the other hand, the embodiment also proposes a locking method of the above-mentioned axial limiting and locking structure with adjustable compression force, which comprises the following steps:

[0048] S1, sequentially placing the target part 5 and the elastic member 3 in the accommodating cavity of the housing 1, and making the right end surface of the target part 5 abut against the bottom wall of the accommodating cavity of the housing 1;

[0049] S2, rotating and screwing the locking ring 4 on the internal thread 1a at the opening of the accommodating cavity of the housing 1 through the external thread 4a of the locking ring 4, adjusting the screwing depth of the locking ring 4, adjusting the axial position of the locking ring 4 relative to the housing 1, and controlling the compression deformation amount of the elastic member 3;

[0050] S3, after the axial position of the locking ring 4 is adjusted in place, inserting the pin 2 into the locking ring 4, and inserting the right end of the pin 2 into the housing 1.

[0051] In the step S3, when the pin 2 is assembled, the following steps are included:

[0052] S301, first, after the axial position of the locking ring 4 is adjusted in place, drilling is performed on the locking ring 4 and the housing 1 by using a hand drill, a through hole 4b is formed on the locking ring 4, and a pin hole 1c is formed on the housing 1;

[0053] S302, after the pin 2 is punched into the through hole 4b on the locking ring 4 in a manner of interference fit, the pin 2 is punched along the axial direction so that the right end of the pin 2 is inserted into the pin hole 1c of the shell 1.

[0054] Further comprising a step S4, when it is needed to adjust the axial position of the locking ring 4 again to adjust the pressure of the elastic member 3, the pin 2 is destroyed by using a hand drill, then the locking ring 4 is rotated to adjust the circumferential position of the locking ring 4 on the shell 1, when the axial position of the locking ring 4 is adjusted in place, the step S301 and the step S302 are repeated. The used through hole 4b and the pin hole 1c cannot be reused.

[0055] The above description is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields within the inventive concept of the present application and the content of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A locking method of an axial position-limiting locking structure with adjustable compression force, the axial position-limiting locking structure comprising a housing (1) and a locking ring (4), the housing (1) having a left-end open cavity, and a target part (5) being installed in the cavity, characterized in that: The inner thread (1a) is arranged on the inner wall of the accommodating cavity mouth of the shell (1); the outer thread (4a) is arranged on the outer circumferential surface of the locking ring (4); the locking ring (4) is screwed on the inner thread (1a) of the accommodating cavity mouth of the shell (1) through the outer thread (4a) thereof; and the axial length of the inner thread (1a) is greater than the thickness of the locking ring (4); the elastic member (3) is arranged between the locking ring (4) and the target part (5), and the elastic member (3) is always in a compressed energy storage state; the pin (2) is inserted on the locking ring (4), and the right end of the pin (2) is inserted into the shell (1); ​ The locking method comprises the following steps: S1, sequentially place the target part (5) and the elastic member (3) in the accommodating cavity of the shell (1), and make the right end surface of the target part (5) abut against the bottom wall of the accommodating cavity of the shell (1); S2, screw the locking ring (4) on the inner thread (1a) of the accommodating cavity mouth of the shell (1) through the outer thread (4a) thereof, adjust the screwing depth of the locking ring (4), and then adjust the axial position of the locking ring (4) relative to the shell (1) to control the compression deformation amount of the elastic member (3); S3, after the axial position of the locking ring (4) is adjusted in place, the pin (2) is inserted from the locking ring (4), and the right end of the pin (2) is inserted into the shell (1) In the step S3, when the pin (2) is assembled, the following steps are included: S301, first, after the axial position of the locking ring (4) is adjusted in place, drilling is performed on the locking ring (4) and the shell (1) by using a hand drill, a through hole (4b) is formed on the locking ring (4), and a pin hole (1c) is formed on the shell (1); S302, the pin (2) is punched into the through hole (4b) on the locking ring (4) in a interference fit manner, and then the pin (2) is punched along the axial direction so that the right end of the pin (2) is inserted into the pin hole (1c) of the shell (1).

2. The method of claim 1, wherein the axial position locking structure is locked by adjusting the compression force. The axial length of the inner thread (1a) on the shell (1) is L; the thickness of the locking ring (4) is T; and they satisfy L≥2T.

3. The method of claim 1, wherein the axial position locking structure is locked by adjusting the compression force. The elastic member (3) is an end face spring.

4. The method of claim 1, wherein the axial position locking structure is locked by adjusting the compression force. The accommodating cavity mouth of the shell (1) is a stepped hole, the inner thread (1a) is arranged on the inner surface of the stepped hole; a stepped surface (1b) is formed between the stepped hole and the accommodating cavity; a plurality of pin holes (1c) are annularly and uniformly distributed on the stepped surface (1b); a plurality of through holes (4b) are arranged on the locking ring (4); the pin (2) is inserted into the through hole (4b) of the locking ring (4), and the right end of the pin (2) is inserted into the pin hole (1c) of the shell (1).

5. The method of claim 4, wherein the axial position locking structure is locked by the pressing force of the pressing member. The pin (2), the through hole (4b) of the locking ring (4), and the pin hole (1c) of the shell (1) are all in interference fit.

6. The method of claim 4, wherein the axial position locking structure is locked by the pressing force of the pressing member. The number of the pins (2) is at least three, and they are circumferentially uniformly distributed.

7. The method of claim 1, wherein the axial position locking structure is locked by adjusting the compression force. The blind holes (4c) are arranged on the left end surface of the locking ring (4), and the number of the blind holes (4c) is two, and the two blind holes (4c) are symmetrically distributed at 180°.

8. The method of claim 1, wherein the axial position locking structure is locked by adjusting the compression force. Further comprising step S4, if it is necessary to adjust the axial position of the locking ring (4) again to adjust the pressure of the elastic member (3), after the pin (2) is destroyed by the hand drill, the locking ring (4) is rotated to adjust the circumferential position of the locking ring (4) on the shell (1), and after the axial position of the locking ring (4) is adjusted in place, the steps S301 and S302 are repeated.

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