Axial limiting and locking structure with anti-rotation function and locking method thereof

Abstract

An axial limiting and locking structure with anti-rotation function and a locking method thereof, the locking structure comprising a shell and an axial limiting ring, the shell having a left-end open cavity for accommodating a target part, a clamping groove being arranged at the open cavity of the shell, a notch being arranged on the axial limiting ring, the axial limiting ring being axially pressed against the target part in the cavity of the shell, a circumferential locking and adjusting device being arranged at the notch for spreading the axial limiting ring so as to clamp the axial limiting ring in the clamping groove of the shell. When disassembly is needed, the circumferential locking and adjusting device is loosened, the axial limiting ring is self-folded under the action of its elasticity, and is thus separated from the clamping groove, achieving the purpose of quick disassembly. The present application effectively combines two anti-rotation designs, and has the advantages of simple structure and reliable locking.

Description

Technical Field

[0001] This invention relates to the field of aero-engine manufacturing technology, and in particular to an axial limiting locking structure with anti-rotation function and its locking method. Background Technology

[0002] In turbomachinery such as aero engines and gas turbines, which have high-speed rotating components, it is necessary to ensure that the relevant stator components operate in a relatively static environment in order to guarantee their reliable operation. Therefore, it is necessary to carry out anti-rotation design for the relevant components.

[0003] The working principle of anti-rotation design is to increase resistance in the circumferential direction. One way is to design a blocking structure at the circumferential position of the adjacent parts of the target part to prevent rotation through mechanical contact. Another way is to increase the axial pressure of the target part to increase the circumferential friction.

[0004] Generally speaking, the former type of anti-rotation design requires corresponding mating structures to be designed at the corresponding positions of the target part and the adjacent parts. This method is suitable for working environments where circumferential rotation is strong or where there are strict restrictions on circumferential rotation. The latter type of anti-rotation design does not require the design of additional mating structures and can meet the strict anti-rotation requirements by increasing the axial clamping force.

[0005] When using the second method for anti-rotation design, how to quickly unlock the locking structure and easily loosen the target part when disassembly is required is an urgent problem to be solved. Summary of the Invention

[0006] The main objective of this invention is to propose an axial limiting locking structure and its locking method with anti-rotation function, which can quickly unlock the locking structure and facilitate the loosening of the target part, thereby solving the above-mentioned technical problems.

[0007] To achieve the above objectives, on the one hand, the present invention proposes an axial limiting and locking structure with anti-rotation function, including a housing and an axial limiting ring. The housing has a left-end open accommodating cavity, in which a target part is installed. A slot is provided at the opening of the accommodating cavity of the housing. A notch is provided on the axial limiting ring. The axial limiting ring axially presses the target part into the accommodating cavity of the housing. A circumferential locking adjustment device is provided at the notch to open the axial limiting ring so that the axial limiting ring is engaged in the slot at the opening of the housing.

[0008] Preferably, the circumferential locking adjustment device includes a screw and a self-locking nut; the self-locking nut is screwed onto the screw; the axial limiting ring forms a first end and a second end at the notch position, a threaded hole is provided on the end face of the first end, and a blind hole is provided on the end face of the second end; one end of the screw is screwed onto the threaded hole, and the other end is movably inserted into the blind hole.

[0009] Preferably, a washer is fitted onto the screw, and the washer is located between the second end face of the axial limiting ring and the self-locking nut.

[0010] Preferably, the width of the notch in the axial limiting ring is D, and the thickness of the self-locking nut is d, where D≥2d.

[0011] Preferably, the outer wall of the slot is provided with a plurality of axial limiting stops evenly distributed; the outer circumferential surface of the axial limiting ring is provided with a plurality of protrusions evenly distributed, the number of protrusions being equal to the number of axial limiting stops; the width of the protrusion is L2, and the spacing between two adjacent axial limiting stops is L1, wherein L2 > L1; when locked, the protrusion is engaged with the inner surface of the axial limiting stops.

[0012] Preferably, the number of axial limiting flanges is not less than four.

[0013] Preferably, a countersunk hole for a lever is provided on the outer end face of the axial limiting ring.

[0014] Preferably, the number of countersunk holes on the lever is two, symmetrically distributed at 180°; the line connecting the two countersunk holes is perpendicular to the line connecting the notch and the center of the axial limiting ring.

[0015] On the other hand, the present invention also proposes a locking method for the above-mentioned axial limiting locking structure with anti-rotation function, comprising the following steps:

[0016] Step S1: Place the target part and the axial limiting ring into the receiving cavity of the housing in sequence, and axially press the axial limiting ring to axially press the target part.

[0017] Step S2: Adjust the circumferential locking adjustment device to open the axial limiting ring so that the axial limiting ring is engaged in the slot at the opening of the housing;

[0018] Step S3: Further adjust the circumferential locking adjustment device so that the axial limiting ring is radially pressed against the groove.

[0019] Preferably, when placing the axial limiting ring into the housing, the circumferential boss of the axial limiting ring is offset from the axial limiting stop of the housing before placement. A cylindrical lever tool is inserted into the lever countersunk hole on the outer end face of the axial limiting ring. The axial limiting ring is rotated until the boss is completely aligned with the axial limiting stop within the circumferential angle range. Then, the self-locking nut in the circumferential locking adjustment device is adjusted to open the axial limiting ring and radially tighten it into the slot of the housing.

[0020] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0021] (1) In this invention, by providing a notch on the axial limiting ring and a circumferential locking adjustment device at the notch, when disassembly is required, the circumferential locking adjustment device can be loosened, and the axial limiting ring can close itself under its own elasticity, thereby disengaging from the slot and achieving the purpose of quick disassembly.

[0022] (2) In this invention, a notch is provided on the axial limiting ring, and a circumferential locking adjustment device is provided at the notch to open the axial limiting ring, so that the axial limiting ring is engaged in the slot at the opening of the housing. The housing and the axial limiting ring are radially tightened to achieve the purpose of preventing rotation, and the axial limiting ring and the target part are axially pressed to achieve the purpose of preventing rotation. Therefore, compared with the existing anti-rotation design structure, this invention effectively combines two anti-rotation designs, which has the advantages of simple structure and reliable locking. It does not require the design of an additional anti-rotation mating structure for the target part, and can achieve the purpose of simplifying the structure of the target part and achieving the requirement of reliable anti-rotation of the target part. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a cross-sectional view of the axial limiting and locking structure with anti-rotation function provided by the present invention;

[0025] Figure 2 for Figure 1 C-direction view;

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 This is a front view of the axial limiting ring in this invention;

[0028] Figure 5 for Figure 4 Sectional view along the middle DD line;

[0029] Figure 6 for Figure 5 Enlarged view of point I in the middle;

[0030] Figure 7 This is a front view of the housing in this invention;

[0031] Figure 8 for Figure 7 EE section view;

[0032] Figure 9 for Figure 7 Enlarged view after sectional view along FF

[0033] Figure 10 This is a schematic diagram showing how the boss of the axial limiting ring is placed inside the housing after being offset from the axial limiting flange of the housing.

[0034] Figure 11 This is a schematic diagram showing the axial limiting ring rotating until the boss completely coincides with the axial limiting flange of the housing within the circumferential angle range.

[0035] The reference numerals in the attached figures are as follows: 1. Housing; 1a. Slot; 1b. Axial limiting stop; 2. Axial limiting ring; 2a. Notch; 2b. Threaded hole; 2c. Blind hole; 2d. Boss; 2e. Dial lever countersunk hole; 3. Target part; 4. Screw; 5. Self-locking nut; 6. Washer. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] As shown in the attached figures, an axial limiting and locking structure with anti-rotation function includes a housing 1 and an axial limiting ring 2. The housing 1 has a left-open accommodating cavity, in which a target part 3 is installed. A groove 1a is provided at the opening of the accommodating cavity of the housing 1. A notch 2a is provided on the axial limiting ring 2. The axial limiting ring 2 axially presses the target part 3 into the accommodating cavity of the housing 1. A circumferential locking adjustment device is provided at the notch 2a to open the axial limiting ring 2, so that the axial limiting ring 2 is engaged in the groove 1a at the opening of the housing 1. The axial limiting ring 2 is made of elastic steel.

[0039] By adopting the above structure, since a notch 2a is provided on the axial limiting ring 2 and a circumferential locking adjustment device is provided at the notch 2a, when disassembly is required, the circumferential locking adjustment device can be loosened, and the axial limiting ring 2 can close itself under its own elasticity, thereby disengaging from the slot 1a and achieving the purpose of quick disassembly.

[0040] Furthermore, by providing a notch 2a on the axial limiting ring 2 and a circumferential locking adjustment device at the notch 2a, the axial limiting ring 2 is opened, allowing it to engage with the slot 1a at the opening of the housing. Radial clamping between the housing 1 and the axial limiting ring 2 achieves anti-rotation, while axial clamping between the axial limiting ring 2 and the target part 3 achieves anti-rotation. Therefore, compared to existing anti-rotation designs, this invention effectively combines two anti-rotation designs, offering advantages such as simple structure and reliable locking. It eliminates the need for additional anti-rotation fitting structures on the target part, simplifying its structure and ensuring reliable anti-rotation.

[0041] Combination Figure 3 As shown, the circumferential locking adjustment device includes a screw 4 and a self-locking nut 5; the self-locking nut 5 is screwed onto the screw 4; the axial limiting ring 2 forms a first end and a second end at the notch 2a position, with a threaded hole 2b on the end face of the first end and a blind hole 2c on the end face of the second end; one end of the screw 4 is screwed onto the threaded hole 2b, and the other end is movably inserted into the blind hole 2c. When it is necessary to open the axial limiting ring 2, simply rotate the self-locking nut 5 to open the second end of the axial limiting ring 2, thus opening the axial limiting ring 2. Conversely, rotating the self-locking nut 5 to move the first end of the axial limiting ring 2 will loosen the axial limiting ring 2, which will then close itself under its own elasticity, thereby achieving the purpose of radially loosening the axial limiting ring 2.

[0042] Combination Figure 3 As shown, a washer 6 is fitted onto the screw 4, and the washer 6 is located between the second end face of the axial limiting ring 2 and the self-locking nut 5. The purpose of setting the washer 6 is to prevent wear on the end face of the axial limiting ring 2 and to protect the axial limiting ring 2.

[0043] Combination Figure 3 As shown, in order to facilitate the rotation of the self-locking nut 5 using a wrench, the wrench needs to have a certain amount of room to move. Therefore, the width of the notch 2a needs to be designed. The width of the notch 2a of the axial limiting ring 2 in its natural state is D, and the thickness of the self-locking nut 5 is d, where D≥2d. This width design facilitates wrench operation.

[0044] Combination Figure 4 , Figures 7 to 9As shown, the outer wall of the slot 1a has multiple axial limiting flanges 1b evenly distributed; the outer circumferential surface of the axial limiting ring 2 has multiple bosses 2d evenly distributed, the number of bosses 2d being equal to the number of axial limiting flanges 1b; the width of each boss 2d is L2, and the spacing between two adjacent axial limiting flanges 1b is L1, where L2 > L1; when locked, the bosses 2d engage with the inner surface of the axial limiting flanges 1b. Since L2 > L1, when placing the axial limiting ring 2, the circumferential bosses 2d of the axial limiting ring 2 are staggered from the axial limiting flanges 1b of the housing 1 before insertion, facilitating the installation of the axial limiting ring 2. To ensure the axial clamping strength of the axial limiting flanges 1b, the number of axial limiting flanges 1b is not less than four.

[0045] Combination Figures 4 to 6 As shown, a countersunk hole 2e is provided on the outer end face of the axial limiting ring 2. When the circumferential boss 2d of the axial limiting ring 2 is inserted after being offset from the axial limiting stop 1b of the housing 1, a cylindrical lever tool can be inserted into the countersunk hole 2e on the outer end face of the axial limiting ring 2 to rotate the axial limiting ring 2 until the boss 2d completely coincides with the axial limiting stop 1b within the circumferential angle range.

[0046] Furthermore, there are two countersunk holes 2e on the lever, which are symmetrically distributed at 180°; the line connecting the two countersunk holes 2e is perpendicular to the line connecting the notch 2a and the center of the axial limiting ring 2.

[0047] On the other hand, this embodiment also provides a locking method for the above-mentioned axial limiting locking structure with anti-rotation function, including the following steps:

[0048] Step S1: Place the target part 3 and the axial limiting ring 2 into the receiving cavity of the housing 1 in sequence, and axially press the axial limiting ring 2 to axially press the target part 3.

[0049] Step S2: Adjust the circumferential locking adjustment device to open the axial limiting ring 2 so that the axial limiting ring 2 is engaged in the slot 1a at the opening of the housing 1;

[0050] Step S3: Further adjust the circumferential locking adjustment device so that the axial limiting ring 2 is radially pressed against the slot 1a.

[0051] Combination Figure 10 , Figure 11As shown, when the axial limiting ring 2 is placed into the housing 1, the circumferential boss 2d of the axial limiting ring 2 is offset from the axial limiting stop 1b of the housing 1 before being placed in. A cylindrical lever tool is inserted into the lever countersunk hole 2e on the outer end face of the axial limiting ring 2. The axial limiting ring 2 is rotated until the boss 2d is completely aligned with the axial limiting stop 1b in the circumferential angle range. Then, the self-locking nut 5 in the circumferential locking adjustment device is adjusted to open the axial limiting ring 2 and radially tighten it into the slot 1a of the housing 1.

[0052] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An axial limiting and locking structure with anti-rotation function, characterized in that: Includes a housing (1) and an axial limiting ring (2). The housing (1) has a left-open accommodating cavity, in which the target part (3) is installed. A slot (1a) is provided at the accommodating cavity opening of the housing (1); A notch (2a) is provided on the axial limiting ring (2); The axial limiting ring (2) axially presses the target part (3) into the receiving cavity of the housing (1); A circumferential locking adjustment device is provided at the notch (2a) to open the axial limiting ring (2) so that the axial limiting ring (2) is engaged in the slot (1a) at the opening of the housing (1); The circumferential locking adjustment device includes a screw (4) and a self-locking nut (5); the self-locking nut (5) is screwed onto the screw (4); the axial limiting ring (2) forms a first end and a second end at the notch (2a) position, a threaded hole (2b) is provided on the end face of the first end, and a blind hole (2c) is provided on the end face of the second end; one end of the screw (4) is screwed onto the threaded hole (2b), and the other end is movably inserted into the blind hole (2c); The outer wall of the slot (1a) is provided with a plurality of axial limiting stops (1b) evenly distributed; the outer circumferential surface of the axial limiting ring (2) is provided with a plurality of bosses (2d), the number of bosses (2d) being equal to the number of axial limiting stops (1b); the width of the boss (2d) is L2, and the spacing between two adjacent axial limiting stops (1b) is L1, wherein L2 > L1; when locked, the boss (2d) is engaged on the inner side of the axial limiting stop (1b).

2. The axial limiting and locking structure with anti-rotation function as described in claim 1, characterized in that: A washer (6) is fitted on the screw (4), and the washer (6) is located between the second end face of the axial limiting ring (2) and the self-locking nut (5).

3. The axial limiting and locking structure with anti-rotation function as described in claim 1, characterized in that: The width of the notch (2a) of the axial limiting ring (2) is D, and the thickness of the self-locking nut (5) is d, where D≥2d.

4. The axial limiting and locking structure with anti-rotation function as described in claim 1, characterized in that: The number of axial limiting flanges (1b) shall not be less than four.

5. The axial limiting and locking structure with anti-rotation function as described in claim 1, characterized in that: A countersunk hole (2e) for a lever is provided on the outer end face of the axial limiting ring (2).

6. The axial limiting and locking structure with anti-rotation function as described in claim 5, characterized in that: The number of countersunk holes (2e) on the lever is two, and they are symmetrically distributed at 180°. The line connecting the two countersunk holes (2e) is perpendicular to the line connecting the notch (2a) and the center of the axial limiting ring (2).

7. A locking method for an axial limiting locking structure with anti-rotation function as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step S1: Place the target part (3) and the axial limiting ring (2) into the receiving cavity of the housing (1) in sequence, and axially press the axial limiting ring (2) to axially press the target part (3); Step S2: Adjust the circumferential locking adjustment device to open the axial limiting ring (2) so that the axial limiting ring (2) is engaged in the slot (1a) at the opening of the housing (1); Step S3: Further adjust the circumferential locking adjustment device so that the axial limiting ring (2) is radially pressed against the groove (1a).

8. The locking method of the axial limiting locking structure with anti-rotation function as described in claim 7, characterized in that: When placing the axial limiting ring (2) into the housing (1), the circumferential boss (2d) of the axial limiting ring (2) is offset from the axial limiting stop (1b) of the housing (1) before being placed in. A cylindrical lever tool is inserted into the lever countersunk hole (2e) on the outer end face of the axial limiting ring (2). The axial limiting ring (2) is rotated until the boss (2d) is completely aligned with the axial limiting stop (1b) in the circumferential angle range. Then, the self-locking nut (5) in the circumferential locking adjustment device is adjusted to open the axial limiting ring (2) and radially press it against the slot (1a) of the housing (1).

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