A port seal for thin-walled rotor air tightness detection and a detection method thereof

Abstract

The application discloses a port sealing device for thin-wall rotor air tightness detection and a detection method thereof. The port sealing device for thin-wall rotor air tightness detection comprises a clamp type clamping chain, an evacuation pipe, a connecting sleeve, a clamping clamp, a rotor port sleeve and a sealing ring. The evacuation pipe can be matched and inserted into a rotor port to be communicated with a rotor end cover. The bottom end of the evacuation pipe is provided with the sealing ring. The sealing ring is in contact with a horizontal surface in the rotor port to be sealed. The rotor port sleeve is sleeved outside the rotor port. The clamping clamp is fixed outside the rotor port sleeve. The bottom of the connecting sleeve is clamped and fixed by the clamping clamp. The top of the connecting sleeve is fixed on the evacuation pipe by the clamp type clamping chain. The sealing device and the sealing surface of the rotor port avoid the port side wall and the influence of collision on the sealing property of the sealing device, so that the sealing connection reliability of the sealing device is improved.

Description

Technical Field

[0001] This invention relates to the field of sealing testing equipment, and in particular to a port seal for testing the airtightness of a thin-walled rotor and its method of use. Background Technology

[0002] To meet its functional requirements, thin-walled rotors must have good sealing performance. After the rotor is formed, it needs to be tested for air tightness using a special sealing device.

[0003] The seal is connected to the rotor port. After evacuation, the sealing performance can be tested. The current seal seals seal by pressing the rubber ring against the side wall of the port. In some special tests, the side wall of the port will rub against each other, which seriously affects the sealing performance of the seal seal. In addition, the connection of the current seal seal is not reliable enough and the operation is inconvenient. Summary of the Invention

[0004] The purpose of this invention is to address the technical defect in the prior art where the port sidewalls rub against each other after some rotor tests, affecting the sealing performance of the sealing device after connection. The invention provides a port sealing device for testing the airtightness of thin-walled rotors, which reselects the sealing surface and sealing form, and no longer uses the sidewalls that are more prone to rubbing as the sealing surface.

[0005] Another object of the present invention is to provide a method for detecting thin-walled rotors using the aforementioned seal.

[0006] The technical solution adopted to achieve the purpose of this invention is:

[0007] A port seal for testing the airtightness of a thin-walled rotor includes a clamp-type chain, a vacuum tube, a connecting sleeve, a clamping clamp, and a sealing ring. The vacuum tube can be inserted into the rotor port to communicate with the rotor end cap. The sealing ring is provided at the bottom end of the vacuum tube. The sealing ring contacts and seals with the horizontal surface inside the rotor port. The rotor port sleeve is fitted over the rotor port. The clamping clamp is fixed to the outside of the rotor port sleeve. The bottom of the connecting sleeve is clamped and fixed by the clamping clamp, and the top is fixed to the vacuum tube by the clamp-type chain.

[0008] In the above technical solution, the connecting sleeve includes an integrally formed connecting tube, an upper convex ring and a lower convex ring, the upper convex ring and the lower convex ring being located at the upper and lower ends of the connecting tube, respectively.

[0009] In the above technical solution, the outer wall of the evacuation tube is in contact with the inner wall of the rotor port.

[0010] In the above technical solution, a positioning flange is provided on the top outer periphery of the evacuation tube.

[0011] In the above technical solution, the clamp-type chain fixes the positioning flange to the upper protruding ring.

[0012] In the above technical solution, a groove is formed on the top of the inner wall of the clamping clamp for the lower convex ring to be inserted.

[0013] In the above technical solution, the clamping clamp includes a clamp A half ring and a clamp B half ring connected by a clamp shaft, and the clamp A half ring and clamp B half ring are fixed by bolts.

[0014] In the above technical solution, a rubber gasket is provided between the clamping clamp and the rotor port sleeve outside the rotor end cover, and an annular groove for the rubber gasket to be embedded is formed at the bottom of the inner wall of the clamping clamp.

[0015] In the above technical solution, the clamp-type chain is a wedge-shaped chain.

[0016] In the above technical solution, the upper positioning surface of the inner groove of the wedge-shaped chain is an upper inclined surface, the lower positioning surface of the inner groove is a lower inclined surface, the upper inclined surface cooperates with the positioning inclined surface at the top of the connecting pipe, and the lower inclined surface cooperates with the fixing inclined surface of the connecting sleeve.

[0017] In another aspect, the present invention provides a method for detecting the port seal of the thin-walled rotor for airtightness testing, comprising the following steps:

[0018] Step 1: Insert the evacuation tube into the rotor port and seal it on the horizontal surface by pressing it with a sealing ring;

[0019] Step 2: Tighten the clamping clamp to press it against the rotor port sleeve, and at the same time, fix the connecting sleeve axially with the clamping clamp.

[0020] Step 3: Tighten the clamp-type chain to press the evacuation pipe and the connecting sleeve together, and press the sealing ring and the horizontal surface of the rotor end cover together to achieve a seal;

[0021] Step 4: Evacuate the rotor through the evacuation tube to conduct a rotor airtightness test.

[0022] In the above technical solution, in step 2, the clamping clamp is locked and the rubber liner is compressed to press the clamping clamp against the rotor port sleeve.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. The sealing surface of the seal and the rotor port of the present invention avoids the port sidewall, thus preventing the impact of friction on the sealing performance of the seal and improving the reliability of the sealing connection. Furthermore, the seal contains multiple rubber parts, is inexpensive, and enhances the sealing effect.

[0025] 2. The rubber parts involved in this invention include a sealing ring and a rubber gasket. The sealing ring makes horizontal contact with the horizontal surface to achieve a sealing effect and can reduce the wear of the evacuation pipe. The rubber gasket can enhance the sealing performance between the connecting sleeve and the clamping clamp and can also reduce the wear of both.

[0026] 3. The clamping clamp provides the necessary load for the axial clamping of the evacuation pipe through the pressing connection with the outside of the rotor port, and also has a good positioning effect. The rotor port sleeve can prevent the rotor end cover from being worn when the clamping clamp is clamped.

[0027] 4. The locking of the seals is all in the form of clamps and chains, specifically including clamp-type chains and clamping clamps, which are simple to operate and have a reliable structure. Attached Figure Description

[0028] Figure 1 The diagram shown is a structural diagram of the port seal for testing the airtightness of a thin-walled rotor according to the present invention.

[0029] Figure 2 This is a cross-sectional view of the connecting sleeve.

[0030] Figure 3 The diagram shows the structure of the clamping clamp, where (a) is a cross-sectional view and (b) is a top view.

[0031] In the diagram: 1-Clamping chain, 2-Evacuation pipe, 2-1-Positioning flange, 2-2-Positioning bevel, 3-Connecting sleeve, 3-1-Upper convex ring, 3-2-Lower convex ring, 3-3-Fixing bevel, 4-Clamping clamp, 4-1-Groove, 4-2-Ring groove, 5-Rubber gasket, 6-Rotor port sleeve, 6-1-Sleeve, 6-2-Ring base, 7-Rotor end cover, 7-1-Port sidewall, 7-2-Rotor port, 7-3-Flange, 7-4-Horizontal plane, 8-Sealing ring, 9-Clamping A half-ring, 10-Clamping shaft, 11-Clamping B half-ring, 12-Bolt. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0033] like Figure 1 As shown, the rotor end cover 7 includes a cylindrical port sidewall 7-1 and a rotor port 7-2 formed on the top of the port sidewall. The bottom inner wall of the rotor port 7-2 protrudes to form a flange 7-3, and the top of the flange is a horizontal surface 7-4. The rotor end cover 7 is provided with a rotor port sleeve 6, which includes an integrally formed annular base 6-2 and a sleeve 6-1 fixed to the top of the annular base. The rotor port cover 6 and the rotor port 7-2 are fixedly connected by interference fit and glue.

[0034] Example 1

[0035] A port seal for testing the airtightness of a thin-walled rotor, such as Figure 1 As shown, the sealing device includes a clamp-type chain 1, a vacuum tube 2, a connecting sleeve 3, a clamping clamp 4, and a sealing ring 8. The vacuum tube 2 can be inserted into the rotor port 7-2 to connect with the rotor end cover 7. The bottom end of the vacuum tube 2 is provided with a sealing ring 8. The outer wall of the vacuum tube 2 is in contact with the inner wall of the rotor port 7-2. The horizontal surface 7-4 inside the rotor port 7-2 is selected as the sealing surface. The sealing device and the rotor port 7-2 are sealed by pressing with the sealing ring 8. The sealing ring 8 is in horizontal contact with the horizontal surface 7-4, which can achieve a better sealing effect.

[0036] The bottom of the connecting sleeve 3 is clamped and fixed by the clamping clamp 4, and the top is fixed to the evacuation pipe 2 by the clamp-type chain 1. The evacuation pipe is axially compressed by the clamp-type chain 1. The clamping clamp 4 needs to be installed outside the rotor port 7-2 to provide the necessary load-bearing capacity and positioning for the clamp-type chain 1. The compression connection between the connecting sleeve 3 and the evacuation pipe 2 provides the necessary load for the axial compression of the evacuation pipe.

[0037] Example 2

[0038] Specifically, such as Figure 2 As shown, the connecting sleeve 3 includes an integrally formed connecting tube, an upper convex ring 3-1, and a lower convex ring 3-2. The upper convex ring 3-1 and the lower convex ring 3-2 are located at the upper and lower ends of the connecting tube, respectively. The connecting sleeve 3 is used to position the evacuation tube 2 and prevent the evacuation tube 2 from being unstable. The top of the inner wall of the clamping clamp 4 has a groove 4-1 for the lower convex ring 3-2 to be inserted to fix the bottom of the connecting sleeve 3. The top outer periphery of the evacuation tube 2 is provided with a positioning flange 2-1. The clamp-type chain 1 fixes the positioning flange 2-1 to the upper convex ring 3-1. After the positioning flange 2-1 and the connecting sleeve 3 are pressed together, the evacuation tube 2, the sealing ring 8, and the rotor end cover 7 are pressed together and sealed.

[0039] like Figure 3 As shown, the clamping clamp 4 includes a clamp A half ring 9 and a clamp B half ring 11 connected by a clamp rotating shaft 10. The clamp A half ring 9 and the clamp B half ring 11 are fixed by bolts 12, so that the clamping clamp has good mobility and is easy to disassemble.

[0040] The bottom of the inner wall of the clamping clamp 4 has an annular groove 4-2 for the rubber gasket 5 to be embedded. The clamping clamp 4 is locked, and the rubber gasket 5 is compressed to make the clamping clamp 4 press and seal with the rotor port sleeve 6.

[0041] The clamp-type chain 1 is a wedge-shaped chain. The upper positioning surface of the inner groove of the wedge-shaped chain is an upper inclined surface 1-1, which cooperates with the positioning inclined surface 2-2 at the top of the positioning flange 2-1. The lower positioning surface of the inner groove is a lower inclined surface 1-2, which cooperates with the fixing inclined surface 3-3 of the upper convex ring 3-1.

[0042] Preferably, the inner diameter of the connecting sleeve 3 is larger than the outer diameter of the rotor port sleeve 6, facilitating disassembly and reducing wear. The difference between the inner diameter of the connecting sleeve 3 and the outer diameter of the rotor port sleeve 6 is less than the thickness of the rubber gasket 5, better ensuring internal sealing of the structure. The rotor port sleeve 6 includes an integrally formed annular base 6-2 and a sleeve 6-1 fixed to the top of the annular base. The sleeve 6-1 is fitted onto the outer wall of the rotor port 7-2, and the annular base 6-1 contacts the top surface of the rotor end cover 7 to reduce wear between the rotor port sleeve and the rotor end cover.

[0043] Example 3

[0044] A method for testing the airtightness of a port seal for a thin-walled rotor, the method comprising:

[0045] Step 1: Insert the evacuation tube 2 into the rotor port 7-2 and press and seal it on the horizontal surface 7-4 by the sealing ring 8;

[0046] Step 2: Tighten the clamping clamp 4, compress the rubber gasket 5 to press the clamping clamp 4 against the rotor port sleeve 6, and at the same time, the clamping clamp 4 axially fixes the connecting sleeve 3.

[0047] Step 3: Tighten the clamp-type chain 1 to press the evacuation pipe 2 and the connecting sleeve 3 together, and press the sealing ring 8 and the horizontal surface 7-4 of the rotor end cover 7 together to achieve a seal;

[0048] Step 4: Evacuate the rotor through the evacuation pipe 2 to conduct a rotor airtightness test.

[0049] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A port seal for testing the airtightness of a thin-walled rotor, characterized in that, The device includes a clamp-type chain, a vacuum tube, a connecting sleeve, a clamping clamp, a sealing ring, and a rotor port sleeve. The vacuum tube is inserted into the rotor port to communicate with the rotor end cover. The sealing ring is located at the bottom of the vacuum tube. The sealing ring contacts and seals with the horizontal surface inside the rotor port. The rotor port sleeve is fitted over the rotor port. The clamping clamp is fixed to the outside of the rotor port sleeve. The bottom of the connecting sleeve is clamped and fixed by the clamping clamp, and the top is fixed to the vacuum tube by the clamp-type chain. The connecting sleeve includes an integrally formed connecting tube, an upper convex ring, and a lower convex ring, the upper convex ring and the lower convex ring being located at the upper and lower ends of the connecting tube, respectively; a groove is formed on the top of the inner wall of the clamping clamp for the lower convex ring to be inserted; the clamping clamp includes a clamp A half ring and a clamp B half ring connected by a clamp rotating shaft, the clamp A half ring and the clamp B half ring being fixed by bolts.

2. The port seal for testing the airtightness of a thin-walled rotor as described in claim 1, characterized in that, The outer wall of the evacuation tube is in contact with the inner wall of the rotor port.

3. The port seal for testing the airtightness of a thin-walled rotor as described in claim 2, characterized in that, The top outer periphery of the evacuation tube is provided with a positioning flange.

4. The port seal for testing the airtightness of a thin-walled rotor as described in claim 3, characterized in that, The clamp-type chain securely connects the positioning flange to the upper protruding ring.

5. The port seal for testing the airtightness of a thin-walled rotor as described in claim 1, characterized in that, A rubber gasket is provided between the clamping clamp and the rotor port sleeve outside the rotor end cover, and an annular groove is formed at the bottom of the inner wall of the clamping clamp for the rubber gasket to be embedded.

6. The port seal for testing the airtightness of a thin-walled rotor as described in claim 1, characterized in that, The clamp-type chain is a wedge-shaped chain.

7. The port seal for testing the airtightness of a thin-walled rotor as described in claim 6, characterized in that, The upper positioning surface of the inner groove of the wedge-shaped chain is an upper inclined surface, and the lower positioning surface of the inner groove is a lower inclined surface. The upper inclined surface cooperates with the positioning inclined surface at the top of the connecting tube, and the lower inclined surface cooperates with the fixing inclined surface of the connecting sleeve.

8. The method for testing the port seal of a thin-walled rotor for airtightness testing as described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Insert the evacuation tube into the rotor port and seal it to the horizontal surface inside the rotor port using a sealing ring. Step 2: Tighten the clamping clamp to press it against the rotor port sleeve, and at the same time, fix the connecting sleeve axially with the clamping clamp. Step 3: Tighten the clamp-type chain to press the evacuation pipe and the connecting sleeve together; Step 4: Evacuate the rotor through the evacuation tube to conduct a rotor airtightness test.

9. The method as described in claim 8, characterized in that, In step 2, the clamping clamp is locked and the rubber gasket is compressed to press the clamping clamp against the rotor port sleeve.

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