Radial supporting piston check ring shaping tool

Abstract

The utility model discloses a radially-supported piston check ring shaping tool which comprises a conical pushing rod and a shaping expansion part. The shaping dilator comprises a dilation supporting rod, a shaping dilation block and an elastic protective sleeve; the outer ring face of the shaping expansion block is attached to the elastic protective sleeve, and the inner ring face of the shaping expansion block is attached to the expansion supporting rod. The tool has the shaping outer circle size within a certain change range, and shaping of the piston check rings of various sizes can be completed; meanwhile, the tool applies uniform expansion force through the conical pushing rod to complete installation, and the problem of violent installation during installation is solved; and finally, after the conical pushing rod is withdrawn, the shaping tool is in clearance fit with the part, so that the tool can be taken down under the condition that the tool is not in contact with the part, and the assembly problems of torsion, breakage and the like of a sealing ring or a check ring caused by violent disassembly are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of carrier rockets, further belongs to the field of mechanical equipment debugging, and particularly relates to a radial support piston check ring shaping tool. BACKGROUND

[0002] In the face of various sealing structures combined by sealing rings, check rings and wear-resistant rings, in the existing operation process, the AQ seal special conical sealing ring on the piston is difficult to assemble by manual operation due to its hard material, and needs to be knocked into place by a rubber mallet. After the assembly of various sealing elements is completed, a cylindrical metal shaping tool with a fixed size is used to complete the shaping process. Due to the large wrapping force of the inner hole sealing element, violent methods such as knocking or strong pulling are needed to complete the disassembly and assembly of the shaping rod, which may cause surface wear of the metal inner hole and damage to the non-metal sealing element.

[0003] A Chinese patent with application number 201910155321.1 discloses a method and a kit for installing a check ring and a sealing ring on a shaft type member. A limiting element is installed in the sealing element installation groove of the shaft type member. The check ring is sleeved in the sealing element installation groove, and the axial deformation of the check ring is limited by the compression of the end face of the limiting element against the end face of the check ring. A cylindrical shaping element is sleeved outside the check ring, and the check ring is restored to the state before installation by the compression of the inner wall of the shaping element against the outer wall of the check ring. The existing technology has the following disadvantages: the check ring needs to be heated, kept warm, and smeared with lubricating grease during installation, involving many procedures and complex processes. At the same time, when shaping various parts with similar structures and consistent basic sizes but inconsistent compression rates, many specific tools need to be processed according to the size requirements of each installation, and misoperation problems such as wrong tool selection may occur. During assembly and disassembly, the assembly and disassembly process may cause abnormal assembly quality phenomena such as twisting, deflection and rupture of the sealing ring and the check ring due to the interference or gap fit between the installed check ring and the tool. SUMMARY

[0004] To solve the above problems, the present application provides a radial support piston check ring shaping tool, which solves the problem of abnormal assembly quality phenomena such as twisting, deflection and rupture of the sealing ring and the check ring during assembly and disassembly due to the interference or gap fit between the installed check ring and the tool.

[0005] The specific technical solutions are as follows:

[0006] A radial support piston check ring shaping tool, comprising a conical pushing rod and a shaping expansion assembly. The shaping expansion assembly comprises an expansion support rod, a shaping expansion block and an elastic protective sleeve. The outer ring surface of the shaping expansion block is attached to the elastic protective sleeve, and the inner ring surface is attached to the expansion support rod.

[0007] The conical pushing rod is pushed to the shaping and expanding assembly to uniformly apply radial force to the expanding support rod.

[0008] The expanding support rod can push the shaping and expanding block to expand to the periphery.

[0009] The shaping and expanding block expands outward, and the elastic protective sleeve is radially stretched.

[0010] The elastic protective sleeve is radially stretched when the shaping and expanding block expands outward, and is retracted inward under the action of its own elasticity after the force disappears; after the elastic protective sleeve is retracted inward, the shaping and expanding block and the expanding support rod return to the original position, the shaping and expanding assembly forms a gap with the shaped part hole, and finally can be taken out from the shaped part hole.

[0011] The diameter of the radially stretched elastic protective sleeve is determined according to the diameter of the tool to be processed.

[0012] The present application has the following beneficial effects:

[0013] (1) The present application has a certain range of shaping outer circle size, and can complete shaping of various sizes of piston check rings.

[0014] (2) The present application completes installation by applying uniform expanding force through the conical pushing rod, solving the problem of violent installation during installation.

[0015] (3) After the conical pushing rod is withdrawn, the shaping tool and the part form a gap fit, which can ensure that the tool is removed without contacting the part, solving the assembly problems such as torsion and rupture of the sealing ring or check ring caused by violent disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0016] 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 prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 A side view of a radial support piston check ring shaping tool according to a preferred embodiment of the present application is shown.

[0018] Figure 2 A-A view in Figure 1 is shown.

[0019] Figure 3 A schematic view of a radial support piston check ring shaping tool according to a preferred embodiment of the present application is shown.

[0020] Figure: 1 is a conical pushing rod, 2 is an expansion support rod, 3 is a shaping expansion block, 4 is an elastic protective sleeve. DETAILED DESCRIPTION

[0021] The advantages and effects of the present application can be easily understood by those skilled in the art from the above description. The present application can also be implemented or applied in other different embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present application.

[0022] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the drawings, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change, and the component layout may be more complex.

[0023] Combination Figures 1 to 3 A radially supported piston retaining ring shaping tool includes a conical pushing rod 1 and a shaping expansion assembly; the shaping expansion assembly includes an expansion support rod 2, a shaping expansion block 3 and an elastic protective sleeve 4, the outer circle surface of the shaping expansion block 3 is in contact with the elastic protective sleeve 4, and the inner circle surface is in contact with the expansion support rod 2; the conical pushing rod 1 is pushed to the shaping expansion assembly, and the conical pushing rod 1, the expansion support rod 2, the shaping expansion block 3 and the elastic protective sleeve 4 are sequentially arranged from inside to outside.

[0024] The conical pushing rod 1 can be pushed to the shaping expansion part to uniformly apply radial force to the expansion support rod 2.

[0025] The expansion support rod 2 can push the shaping expansion block 3 to expand to the periphery.

[0026] The shaping expansion block 3 expands outward, and the elastic protective sleeve 4 is radially stretched.

[0027] The elastic protective sleeve 4 is radially stretched when the shaping expansion block 3 expands outward, and is retracted inward under its own elastic force after the force disappears; after the elastic protective sleeve 4 retracts inward, the shaping expansion block 3 and the expansion support rod 2 return to their original positions, the shaping expansion assembly forms a gap with the shaped part hole, and finally can be taken out from the shaped part hole.

[0028] The diameter of the radially stretched elastic protective sleeve 4 is determined according to the diameter of the tool to be processed.

[0029] The above-described embodiments of the application serve only to illustrate the principles of the application. These embodiments are not intended to limit the scope of the application to the exact construction described herein and described specifically in these embodiments. As such, many modifications and variations of the embodiments are possible in light of the above teachings and can be practiced otherwise than as specifically described. While the principles of the application have been described above in connection with specific embodiments, it is to be understood that this description is made only by way of example and not as a limitation of the scope of the application.

Claims

1. A radially supported piston retaining ring shaping tool, characterized in that: The invention comprises a tapered propulsion rod (1) and a shaping and expansion assembly; the shaping and expansion assembly comprises an expansion support rod (2), a shaping and expansion block (3), and an elastic protective sleeve (4); the outer ring surface of the shaping and expansion block (3) is in contact with the elastic protective sleeve (4), and the inner ring surface is in contact with the expansion support rod (2).

2. A radially supported piston retaining ring shaping tool as claimed in claim 1, characterized in that: The tapered propulsion rod (1) is pushed into the shaping and expansion assembly to uniformly apply radial force to the expansion support rod (2).

3. A radially supported piston retaining ring shaping tool as claimed in claim 1, characterized in that: The expansion support rod (2) pushes the shaping expansion block (3) to expand toward the periphery.

4. A radially supported piston retaining ring shaping tool as claimed in claim 1, characterized in that: The shaping expansion block (3) expands outwards, stretching the elastic protective sleeve (4) in the radial direction.

5. The radially supported piston retaining ring shaping tool as claimed in claim 1, characterized in that: The elastic protective sleeve (4) stretches radially when the shaping expansion block (3) expands outward, and retracts inward under the action of its own elastic force after the force disappears; after the elastic protective sleeve (4) retracts inward, the shaping expansion block (3) and the expansion support rod (2) return to their original positions.

6. A radially supported piston retaining ring shaping tool as claimed in claim 4, characterized in that: The diameter of the elastic protective sleeve (4) after radial stretching is determined according to the diameter of the tooling to be processed.

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