An assembling method of equal-diameter multi-channel sealing ring valve

Abstract

The present application belongs to the field of precision assembly of aero-engine accessories, and relates to an assembly method of an equal-diameter multi-channel sealing ring valve, which solves the problem of sealing ring damage in the assembly process. The assembly method comprises the following steps: (1) washing the outer surface of the valve bush with a cleaning solution, and then air-drying at room temperature; (2) installing the sealing ring to the outer sealing ring groove of the valve bush; (3) installing the valve bush with the sealing ring to the shell hole; (4) taking out the valve bush assembly with the sealing ring from the shell mounting hole, and pulling out the valve bush assembly with the sealing ring from the shell mounting hole; (5) taking off the sealing ring from the valve bush, and sequentially removing the sealing ring on the valve bush by using a tooling cone.

Description

Technical Field

[0001] This invention belongs to the field of precision assembly of aero-engine accessories, and relates to an improvement on the assembly method of a valve with multiple sealing rings of equal diameter. Background Technology

[0002] In the traditional assembly method for valves with multiple sealing rings of equal diameter, after applying grease to the sealing rings, a plastic scriber is used to install them into the mounting groove on the outer diameter of the valve bushing. Then, the valve bushing assembly with the sealing rings is pressed into the housing mounting hole by hand. During this process, the sealing rings are easily scratched when passing through sharp parts such as the outer circumference shoulder of the valve bushing. In addition, because the resistance is relatively large when the sealing rings are compressed into the housing hole, the valve bushing is prone to tilting when pressed into the housing hole, causing abnormal cutting and extrusion of the sealing rings, resulting in damage. Summary of the Invention

[0003] The purpose of this invention is to provide an assembly method for a valve with multiple sealing rings of equal diameter, thereby solving the problem of seal ring damage during assembly.

[0004] The technical solution of this invention is:

[0005] A method for assembling a valve with multiple sealing rings of equal diameter includes:

[0006] (1) Wash the outer surface of the valve bushing with cleaning solution, and then air dry at room temperature;

[0007] (2) Install the sealing ring into the sealing ring groove on the outside of the valve bushing;

[0008] (3) Install the valve bushing with the sealing ring into the housing hole;

[0009] (4) Remove the valve bushing assembly with sealing ring from the housing mounting hole and pull the valve bushing assembly with sealing ring out of the housing mounting hole.

[0010] (5) Remove the sealing rings from the valve bushing and use a tooling cone to remove the sealing rings from the valve bushing one by one.

[0011] Step (1) also includes: visually inspecting and confirming that the guide angle of the housing hole, the shoulder of the valve bushing is smooth and free of burrs and protrusions, and the sealing ring is free of scratches and flash defects.

[0012] Step (1) Dry at room temperature for 15 minutes.

[0013] Step (2) specifically involves:

[0014] (21) Apply lubricant to the outer / inner surfaces of the sealing ring and the tooling cone. Start installing the sealing ring through the end with the smaller diameter of the tooling cone until it is close to the end with the larger diameter of the tooling cone. At this time, the sealing ring is stretched open and fits on the tooling cone.

[0015] (22) Then install the tool cone with the outer sealing ring onto the valve bushing. The larger diameter end of the tool cone is aligned with the sealing ring mounting groove of the valve bushing. The tool cone covers the shoulder of other sealing ring grooves and oil grooves on the outside of the valve bushing. Then continue to push the sealing ring towards the larger diameter end of the tool cone until the sealing ring is separated from the outer circle of the tool cone and enters the sealing ring groove of the valve bushing.

[0016] (23) Visually inspect the sealing ring to ensure it is smooth and free of kinks; otherwise, use a plastic scriber to straighten it.

[0017] In step (2), the wall thickness of the large diameter end of the tooling cone is no more than 0.6 mm, and a 30° chamfer is provided at the outer diameter of the small diameter end and both ends are polished.

[0018] Step (3) specifically involves:

[0019] (31) Apply a layer of lubricant to the inner hole of the guide sleeve, and then install the guide sleeve into the housing mounting hole. The distance from the mounting positioning surface to the end face of the access end should match the distance from the housing positioning surface to the first sealing ring groove.

[0020] (32) Insert the valve bushing into the outer diameter of the locator at the bottom of the pressure rod. While fixing the locator with the left hand, rotate the nut with the right hand to move the pressure rod to the side of the nut. The conical surface at the bottom of the pressure rod expands the outer diameter of the bottom of the locator and fixes the valve bushing to the locator through the inner hole contact.

[0021] (33) Apply a layer of lubricant to the outside of the valve bushing connected to the pressure rod. Use the pressure rod and nut to make the valve bushing assembly pass through the inner cone of the guide sleeve and the inner diameter of the access end until the valve bushing is pressed into the bottom of the mounting hole. At this time, all three sealing rings enter the mounting groove of the housing hole.

[0022] Step (4) is as follows:

[0023] (41) Apply a layer of lubricant to the inner hole of the guide sleeve, and then install its access end into the housing mounting hole. The distance from the mounting positioning surface to the end face of the access end should match the distance from the housing positioning surface to the first sealing ring groove.

[0024] (42) While fixing the positioner with the left hand, rotate the nut with the right hand to separate the cone surface of the pressure rod from the housing of the positioner. Then, insert the pressure rod together with the housing of the small diameter end of the positioner into the inner hole of the valve bushing through the guide inner cone of the guide sleeve. Rotate the nut to make the cone surface of the pressure rod open the housing of the positioner until it is fixed to the inner hole of the valve bushing.

[0025] (43) Fix the guide sleeves on the left and right, and use your right hand to hold the outside of the nut and apply force to the side that is detached from the guide sleeve, so that the valve bushing is detached from the housing mounting hole.

[0026] Step (5) specifically involves:

[0027] (51) Use the tip of a plastic scribing needle to lift the inner diameter of the sealing ring and remove it from the end of the valve bushing;

[0028] (52) Apply a small amount of lubricant to the outer / inner surfaces of the sealing ring and the tooling cone. Pass the thin-walled end of the tooling cone through the installation groove of the first sealing ring that has just been removed and connect it to the groove of the second sealing ring. The tooling cone completely covers the valve bushing shoulder part that the sealing ring passes through during disassembly, and the sealing ring installation groove is completely exposed. Then use the tip of the plastic scriber to lift the inner diameter of the sealing ring, so that the sealing ring is pushed through the outer diameter of the tooling cone and removed from the small diameter end.

[0029] (53) Use the tip of a plastic scribing needle to lift the inner diameter of the sealing ring at the other end, so that the sealing ring can be removed from the end.

[0030] In step (5), the thickness of the tool cone wall should not exceed 0.6 mm. A 30° chamfer should be provided at the outer diameter of the smaller diameter end and both ends should be polished. The outer surface should be smooth and without sharp edges to avoid jamming and scratching of the sealing ring when it passes through.

[0031] The advantages of this invention are:

[0032] (1) A process method for installing and removing sealing rings is provided. When installing or removing sealing rings through holes, openings, or stepped holes, special process equipment is used to guide the process and protect the sealing rings.

[0033] (2) A process for installing and removing a valve assembly with a sealing ring is provided, wherein the valve assembly with the sealing ring is fixed and guided when it is installed into the housing to avoid damage to the sealing ring caused by tilting during the installation process.

[0034] (3) A process for installing and removing a valve assembly with a sealing ring is provided, wherein the assembly with the sealing ring is guided when it is removed from the housing mounting hole to avoid damage to the sealing ring caused by uneven force during the process. Attached Figure Description

[0035] Figure 1 This is a flowchart of the method of the present invention.

[0036] Figure 2 This is a schematic diagram of the tooling cone used in the method of the present invention.

[0037] Figure 3 This is a schematic diagram of the assembly and disassembly guide device for the method of the present invention. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0039] This invention relates to an assembly method for a valve with multiple sealing rings of equal diameter. The specific operation steps are as follows:

[0040] (1) Wash the outer surface of the valve bushing with cleaning solution and then air dry at room temperature for 15 minutes. Visually inspect to confirm that the guide angle of the housing hole and the shoulder of the valve bushing are smooth and free of burrs and protrusions, and that the sealing ring is free of scratches, flash and other defects.

[0041] (2) Install the sealing ring into the sealing ring groove on the outside of the valve bushing.

[0042] Apply a small amount of lubricant to the outer / inner surfaces of the sealing ring and the tool cone. Start installing the sealing ring through the smaller diameter end of the tool cone, moving towards the larger diameter end. At this point, the sealing ring will be stretched open and fitted onto the tool cone. Next, install the tool cone with the outer sealing ring onto the valve bushing, aligning the larger diameter end of the tool cone with the sealing ring mounting groove on the valve bushing. The tool cone should cover the shoulder of other sealing ring grooves and oil grooves on the outside of the valve bushing. Continue pushing the sealing ring towards the larger diameter end of the tool cone until it detaches from the outer circumference of the tool cone and enters the sealing ring groove of the valve bushing. Then, install the other sealing rings on the valve bushing in the same way. Visually inspect the sealing rings; they should be smooth and free of kinks. If not, use a plastic scriber to straighten them.

[0043] The wall thickness of the large-diameter end of the tooling cone should not exceed 0.6mm. The outer diameter of the small-diameter end should be chamfered at 30° and polished at both ends to ensure that the outer surface is smooth and without sharp edges, so as to avoid jamming and scratching of the sealing ring when it passes through.

[0044] (3) Use specialized equipment to install the valve bushing with the sealing ring into the housing hole.

[0045] First, apply a thin layer of lubricant to the inner hole of the guide sleeve, and then install its access end into the housing mounting hole. Note that the distance from the mounting positioning surface to the end face of the access end should match the distance from the housing positioning surface to the first sealing ring groove.

[0046] Next, insert the valve bushing into the outer diameter of the locator at the bottom of the pressure rod. While holding the locator in place with your left hand, rotate the nut with your right hand to move the pressure rod to one side of the nut. The conical surface at the bottom of the pressure rod expands the outer diameter of the locator, and the valve bushing is fixed to it through the inner hole.

[0047] Finally, apply a thin layer of lubricant to the outside of the valve bushing connected to the pressure rod. Using the pressure rod and nut, press the valve bushing assembly through the inner cone of the guide sleeve and the inner diameter of the access end until the valve bushing is pressed into the bottom of the mounting hole. At this point, all three sealing rings have entered the mounting groove of the housing hole. Throughout the pressing process, the locator, in cooperation with the inner hole of the guide sleeve, ensures vertical insertion. This ensures that the sealing rings pass perpendicularly through the guide angle of each mounting groove, preventing uneven stress on the outer surface of the sealing rings and avoiding abnormal cutting and extrusion that could damage the sealing function. When assembling a multi-ring valve bushing assembly with more than three sealing rings of equal diameter, the pressure rod assembly should be slowly rotated and pressed in through each stepped hole into the sealing ring mounting groove, with a rotation angle of approximately 10°.

[0048] (4) Remove the valve bushing assembly with sealing ring from the housing mounting hole. The reverse of step (3) is to pull the valve bushing assembly with sealing ring out of the housing mounting hole.

[0049] First, apply a thin layer of lubricant to the inner hole of the guide sleeve, then install its connecting end into the housing mounting hole. Note that the distance from the mounting positioning surface to the connecting end should match the distance from the housing positioning surface to the first sealing ring groove. Next, while holding the positioner with your left hand, rotate the nut with your right hand to disengage the pressure rod cone from the positioner housing. Then, insert the pressure rod, along with the housing at the smaller diameter end of the positioner, through the guide inner cone of the guide sleeve into the valve bushing's inner hole. Rotate the nut to open the positioner housing with the pressure rod cone until it is fixed to the valve bushing's inner hole. Finally, secure the guide sleeve with both hands, and with your right hand, apply force to the side of the nut that is disengaged from the guide sleeve, causing the valve bushing to detach from the housing mounting hole. During this process, the positioner slides by matching its outer diameter with the inner hole of the guide sleeve, guiding the direction of force when the valve bushing is pulled out, preventing tilting and damage to the sealing ring.

[0050] (5) Remove the sealing ring from the valve bushing. This is the reverse of step (2). Use a tooling cone to remove the sealing rings from the valve bushing one by one to avoid damaging the sealing rings when passing through sharp parts such as the bushing shoulder.

[0051] First, use the tip of a plastic scriber to lift the inner diameter of the sealing ring, allowing it to be removed from the end of the valve bushing. Then, apply a small amount of lubricant to the outer / inner surfaces of the sealing ring and the tool cone. Insert the thin-walled end of the tool cone through the mounting groove where the first sealing ring was removed, and connect it to the groove for the second sealing ring. The tool cone should completely cover the valve bushing shoulder area through which the sealing ring passed during disassembly, and the sealing ring mounting groove should be fully exposed. Next, use the tip of the plastic scriber to lift the inner diameter of the sealing ring, allowing it to be pushed through the outer diameter of the tool cone and removed from the smaller diameter end. Finally, use the tip of the plastic scriber to lift the inner diameter of the other end of the sealing ring, allowing it to be removed from the end. The wall thickness of the tool cone should not exceed 0.6mm. A 30° chamfer should be provided at the outer diameter of the smaller diameter end, and both ends should be polished to ensure a smooth, edgeless outer surface, preventing jamming and scratches when the sealing ring passes through.

Claims

1. A method of assembling an equal diameter multi-channel seal ring valve, comprising: The method comprises the following steps: (1) washing the outer surface of the valve bush with a cleaning solution, and then air-drying at room temperature; (2) installing the sealing ring to the outer sealing ring groove of the valve bush; (3) installing the valve bush with the sealing ring to the housing hole; (4) taking out the valve bush with the sealing ring from the housing installation hole, and pulling out the valve bush with the sealing ring from the housing installation hole; (5) taking off the sealing ring from the valve bush, and sequentially taking off the sealing ring on the valve bush by using a tooling cone. The step (3) specifically comprises: (31) coating the inner hole of the guide sleeve with a layer of lubricating liquid, and then installing the access end of the guide sleeve to the housing installation hole, and matching the distance between the installation positioning surface and the end face of the access end to the distance between the housing positioning surface and the first sealing ring groove; (32) installing the valve bush to the outer diameter of the positioner at the bottom of the pressure rod, fixing the positioner with the left hand while rotating the nut with the right hand, moving the pressure rod to the side of the nut, expanding the outer diameter of the positioner at the bottom by the tapered surface at the bottom of the pressure rod, and fixing the valve bush and the positioner through the inner hole contact; (33) coating the outer part of the valve bush connected with the pressure rod with a layer of lubricating liquid, and making the valve bush assembly pass through the guide inner cone of the guide sleeve and the inner diameter of the access end by the pressure rod and the nut, until the valve bush is pressed into the installation hole, at this time, the three sealing rings are all in the installation groove of the housing hole.

2. The method of assembling a constant diameter multi-way seal ring valve as defined in claim 1, wherein, The step (1) further comprises: visually checking and confirming the guide angle of the housing hole, the smoothness of the shoulder part of the valve bush without burrs and protrusions, and the sealing ring without scratches and flash defects.

3. A method of assembling an equal diameter multi-way seal ring valve as claimed in claim 2, wherein, The air-drying time of the step (1) at room temperature is 15 min.

4. The method of assembling an equal diameter multi-way seal ring valve of claim 1, wherein, The step (2) specifically comprises: (21) coating the outer / inner surface of the sealing ring and the tooling cone with lubricating liquid, and installing the sealing ring through the small-diameter end of the tooling cone, until the large-diameter end of the tooling cone, at this time, the sealing ring is stretched and is sleeved on the tooling cone; (22) then installing the tooling cone with the outer sealing ring to the valve bush, aligning the large-diameter end of the tooling cone with the sealing ring installation groove of the valve bush, and covering the shoulder part of the other sealing ring grooves and oil grooves of the valve bush with the tooling cone, and then continuing to push the sealing ring to the large-diameter end of the tooling cone, until the sealing ring is separated from the outer circle of the tooling cone and enters the sealing ring groove of the valve bush; (23) visually checking that the sealing ring should be smooth without kinks, otherwise, using a plastic marking needle to straighten it.

5. The method of assembling a constant diameter multi-way seal ring valve of claim 4, wherein, In the step (2), the wall thickness of the large-diameter end of the tooling cone is not greater than 0.6 mm, and the outer diameter of the small-diameter end is provided with a 30° chamfer and is polished at both ends.

6. The method of assembling a constant diameter multi-way seal ring valve of claim 1, wherein, The step (4) specifically comprises: (41) coating the inner hole of the guide sleeve with a layer of lubricating liquid, and then installing the access end of the guide sleeve to the housing installation hole, and matching the distance between the installation positioning surface and the end face of the access end to the distance between the housing positioning surface and the first sealing ring groove; (42) fixing the positioner with the left hand while rotating the nut with the right hand, making the tapered surface of the pressure rod separate from the outer shell of the positioner, and then making the pressure rod together with the outer shell of the small-diameter end of the positioner pass through the guide inner cone of the guide sleeve and be installed into the inner hole of the valve bush, rotating the nut to make the tapered surface of the pressure rod stretch the outer shell of the positioner, until the inner hole of the valve bush is fixed; (43) fixing the guide sleeve, and making the nut on the outer side of the right hand force to separate from the guide sleeve, so that the valve bush separates from the housing installation hole.

7. The method of assembling a constant diameter multi-way seal ring valve of claim 1, wherein, The step (5) specifically comprises: (51) using the plastic scribe tip to pick up the inner diameter of the sealing ring, so that it is removed from the end of the valve bushing; (52) Apply a small amount of lubricating liquid to the outer / inner surface of the sealing ring and the tooling cone. Pass the thin-walled end of the tooling cone through the installation groove where the first sealing ring was just removed, and attach it to the second sealing ring groove. The tooling cone completely covers the sealing ring disassembly through the convex shoulder part of the valve bushing, and the sealing ring installation groove is completely exposed. Then use the plastic scribe tip to pick up the inner diameter of the sealing ring, so that the sealing ring is pushed through the outer diameter of the tooling cone and removed from the small diameter end; (53) using the plastic scribe tip to pick up the inner diameter of the sealing ring, so that it is removed from the end.

8. The method of assembling a constant diameter multi-way seal ring valve of claim 7, wherein, The wall thickness of the tooling cone in step (5) is not greater than 0.6 mm, and a 30° reverse chamfer should be provided at the outer diameter of the small diameter end and both ends should be polished. The outer surface should be smooth without edges to avoid jamming and scratching when the sealing ring passes through.

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