CN220120337U - Fingertip seal inspection tool - Google Patents
Fingertip seal inspection tool Download PDFInfo
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- CN220120337U CN220120337U CN202321496148.XU CN202321496148U CN220120337U CN 220120337 U CN220120337 U CN 220120337U CN 202321496148 U CN202321496148 U CN 202321496148U CN 220120337 U CN220120337 U CN 220120337U
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- fingertip
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- 238000007689 inspection Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 239000000725 suspension Substances 0.000 claims abstract description 47
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a fingertip seal inspection tool, which belongs to the technical field of fingertip seal inspection equipment and comprises an inner cylinder, wherein an outer cylinder is sleeved outside the inner cylinder, a gap is formed between the inner cylinder and the outer cylinder, and fingertip seals are arranged at two ends of the gap; the inner cylinder, the outer cylinder and the fingertips are sealed to form a sealed cavity; the suspension assembly is arranged between the inner cylinder and the outer cylinder; bearing force is applied to the outer cylinder so as to reduce friction force between the outer cylinder and fingertip seal; the transverse pushing assembly drives the outer cylinder to transversely move relative to the inner cylinder; the force detection assembly is used for measuring the pressure applied to the outer cylinder by the transverse pushing assembly; the air pressure detection assembly is used for measuring the air pressure of the sealed cavity; a displacement detection assembly for measuring the moving distance of the outer cylinder relative to the inner cylinder; the utility model can make the outer cylinder in a suspension state during detection by utilizing the suspension component, can effectively avoid the friction force affecting the detection result generated by the outer cylinder during movement, and ensures the accuracy of the detection result of the rigidifying rate and the hysteresis rate of the fingertip seal.
Description
Technical Field
The utility model relates to the technical field of fingertip seal inspection equipment, in particular to a fingertip seal inspection tool.
Background
The fingertip seal is a novel sealing technology developed after the grate tooth seal and the brush seal and used for air path seal and main shaft seal of the aeroengine, has the characteristics of good sealing performance and low manufacturing cost, and has very good application prospect in the aspects of improving the performance and service life of the engine, reducing the cost and the like.
How to accurately detect whether the fingertip seal is qualified is a difficult problem in the industry; the main reason is that when the rigidization rate and hysteresis rate of the fingertip seal are checked, the friction force generated when the fingertip seal is driven to move by the traditional checking tool causes larger deviation of the detection result, thereby affecting the accuracy of the detection result; in addition, the current rigidizing rate and hysteresis rate detection tool for detecting fingertip seal is unreasonable in design, and poor in sealing effect can also cause inaccurate experimental data measurement.
Therefore, designing a tool for testing the accuracy of the detection results of the rigidifying rate and the hysteresis rate of the fingertip seal, wherein the friction force generated during the movement of the fingertip seal does not affect the detection results, is a problem to be solved in the present stage.
Disclosure of Invention
For the problems in the prior art, the fingertip seal inspection tool provided by the utility model has the advantages that the outer cylinder can be in a suspension state during detection by using the suspension component, so that the friction force affecting the detection result during movement of the outer cylinder can be effectively avoided, and the accuracy of the detection result of the fingertip seal rigidization rate and hysteresis rate is ensured.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a fingertip seal inspection tool, which comprises:
an outer cylinder is sleeved outside the inner cylinder, a gap is formed between the inner cylinder and the outer cylinder, and fingertip seals are arranged at two ends of the gap; the outer wall of the inner cylinder, the inner wall of the outer cylinder and the two fingertips are sealed to form a sealing cavity;
the suspension assembly is arranged between the inner cylinder and the outer cylinder; the suspension assembly can apply upward bearing force to the outer cylinder so as to reduce friction force between the outer cylinder and the fingertip seal in the vertical direction;
the transverse pushing assembly can drive the outer cylinder to transversely move relative to the inner cylinder;
the force detection assembly is used for measuring the pressure applied to the outer cylinder by the transverse pushing assembly;
the air pressure detection component is used for measuring the air pressure of the sealed cavity;
and the displacement detection assembly is used for measuring the moving distance of the outer cylinder relative to the inner cylinder.
As a preferable technical scheme, the novel high-pressure water heater further comprises a base, wherein a plurality of equal-height cushion blocks which are circumferentially arranged are arranged on the base, and the inner cylinder is fixed on the equal-height cushion blocks.
As a preferable technical scheme, the transverse pushing assembly comprises a supporting seat fixed on the base, a pushing rod in threaded connection with the supporting seat is arranged on the supporting seat, and the pushing rod is connected with a hand wheel for driving the pushing rod to rotate.
As a preferable technical scheme, the outer circumferential surface of the outer cylinder is provided with a plurality of connecting blocks; when the transverse pushing assembly drives the outer cylinder to transversely move relative to the inner cylinder, the end face of the pushing rod is abutted to the connecting block.
As a preferable technical scheme, the pushing rod and the connecting block are arranged along the radial direction of the outer cylinder; and/or the end face of the connecting block facing the pushing rod is provided with a positioning groove, and the end face of the pushing rod facing the connecting block is provided with a positioning protrusion matched with the positioning groove.
As a preferred technical scheme, the pushing rod is divided into a first section and a second section along the axial direction of the pushing rod; the force detection assembly is disposed between the first section and the second section.
As a preferable technical scheme, the suspension assembly comprises a support plate fixed on the inner cylinder, an air suspension block is arranged on the outer cylinder, an air suspension cavity is formed between the air suspension block and the support plate, and the air suspension block is in sliding sealing connection with the support plate; the support plate is provided with an air inlet communicated with the air suspension cavity, and the air inlet is connected with a first air source; the displacement detection assembly can be arranged between the outer cylinder and the supporting plate and is used for measuring the moving distance of the outer cylinder relative to the inner cylinder, and the displacement detection assembly is preferably set to be a dial indicator.
As a preferable technical scheme, the upper end and the lower end of the outer cylinder are provided with flanges; the outer cylinder comprises a middle cylinder, baffles are arranged at two ends of the middle cylinder, fingertips are embedded between the flange and the middle cylinder in a sealing mode, the flange is abutted to the baffles, and a sealing ring is embedded between the flange and the baffles.
As a preferable technical scheme, the inner wall surface of the inner cylinder is provided with a plurality of two-way connectors, one end of each two-way connector is communicated with the sealing cavity, and the other end of each two-way connector is connected with a second air source.
As a preferable technical scheme, the air pressure detection component is an air pressure gauge, the air pressure gauge is arranged on the outer peripheral surface of the outer cylinder, and the air pressure gauge is communicated with the sealing cavity.
The beneficial effects of the utility model are as follows:
1. the utility model can apply continuous and stable bearing force to the outer cylinder by utilizing the suspension component, so that the outer cylinder is in a suspension state, namely, no friction force exists between the outer cylinder and the fingertip seal in the vertical direction; during detection, the outer cylinder moves relative to the inner cylinder, friction force which influences the detection result is not generated between the outer cylinder and the fingertip seal, and accuracy of the detection result of the fingertip seal rigidification rate and the hysteresis rate can be effectively guaranteed.
2. The utility model can measure the moving distance of the outer cylinder relative to the inner cylinder by utilizing the displacement detection component, the pressure value applied to the outer cylinder by the transverse pushing component can be measured by the force detection component, the air pressure value information of the sealing cavity can be measured by the air pressure detection component, the outer cylinder is pushed to transversely move a plurality of positions relative to the inner cylinder by the transverse pushing component, and the rigidifying rate (comprising pressure Cheng Gangdu and return stiffness) and hysteresis rate of fingertip sealing can be calculated according to the measuring information of the displacement detection component, the force detection component and the air pressure detection component.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of a tool for inspecting fingertip seals according to the present utility model;
fig. 2 is a cross-sectional view of fig. 1.
In the figure: 1-inner cylinder, 11-supporting plate, 12-air inlet, 13-two-way joint, 2-outer cylinder, 21-connecting block, 22-air suspension block, 23-air suspension cavity, 24-flange, 25-middle cylinder, 26-baffle, 27-sealing ring, 3-fingertip seal, 31-sealing cavity, 41-supporting seat, 42-pushing rod, 43-hand wheel, 5-force detection component, 6-air pressure detection component, 7-base and 71-equal-height cushion block.
Detailed Description
The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
Referring to fig. 1 and fig. 2, an embodiment of a tool for inspecting fingertip seal provided by the present utility model includes: the inner cylinder 1 and the outer cylinder 2 are sleeved outside the inner cylinder 1, and the outer cylinder 2 and the inner cylinder 1 are both cylindrical; when no external force is applied, the axis of the outer cylinder 2 and the axis of the inner cylinder 1 are collinear; a gap is formed between the inner cylinder 1 and the outer cylinder 2, and fingertip seals 3 are arranged at the upper end and the lower end of the gap; the outer wall of the inner cylinder 1, the inner wall of the outer cylinder 2 and the two fingertip seals 3 form a seal chamber 31; a suspension component is arranged between the inner cylinder 1 and the outer cylinder 2, and the suspension component can apply a continuous and stable upward bearing force to the outer cylinder 2, so that the outer cylinder 2 is in a suspension state, namely the friction force between the outer cylinder 2 and the fingertip seal 3 in the vertical direction is reduced to zero, and the influence of the friction force on a detection result is avoided; the transverse pushing component is positioned on one side of the outer cylinder 2, the outer cylinder 2 is driven to transversely move to different positions relative to the inner cylinder 1 by the transverse pushing component, and the rigidifying rate (comprising the pressure Cheng Gangdu and the return stiffness) and the hysteresis rate of the fingertip seal 3 can be calculated according to the pressure applied by the transverse pushing component when the sealing chamber 31 is controlled to have different air pressure values; the force detection component 5 is arranged between the transverse pushing component and the outer cylinder 2, and the force detection component 5 can measure the pressure applied by the transverse pushing component to the outer cylinder 2; the air pressure detection component 6 is communicated with the sealing chamber 31, and the air pressure detection component 6 can measure the air pressure of the sealing chamber 31; the displacement detection assembly is positioned between the outer cylinder 2 and the inner cylinder 1, and can measure the moving distance of the outer cylinder 2 relative to the inner cylinder 1.
In this embodiment, referring to fig. 1 and 2, the present utility model further includes a base 7, and a plurality of equal-height cushion blocks 71 circumferentially arranged on the base 7, where the inner cylinder 1 is fixed on the equal-height cushion blocks 71, so as to ensure that the inner cylinder 1 is horizontally arranged; specifically, be equipped with the bolt that a plurality of circumference set up on the base 7, the bolt passes inner tube 1 and contour cushion 71 back in proper order and base 7 threaded connection, can be firm fix inner tube 1 on base 7.
In this embodiment, referring to fig. 1 and 2, the transverse pushing assembly includes a supporting seat 41 welded on the base 7, a pushing rod 42 screwed on the supporting seat 41, the pushing rod 42 is connected with a hand wheel 43 for driving the pushing rod to rotate, and the pushing rod 42 can be moved along the axial direction by rotating the hand wheel 43; further, a plurality of connecting blocks 21 are arranged on the outer peripheral surface of the outer cylinder 2; when the transverse pushing assembly drives the outer cylinder 2 to transversely move relative to the inner cylinder 1, the end face of the pushing rod 42 is abutted against the connecting block 21, and the pushing rod 42 can drive the outer cylinder 2 to move along with the transverse pushing assembly; furthermore, the pushing rod 42 and the connecting block 21 are arranged along the radial direction of the outer cylinder 2, so that the outer cylinder 2 is only influenced by radial force, and the pushing rod 42 drives the outer cylinder 2 to stably and transversely move, and meanwhile, non-radial friction force is not generated between the outer cylinder 2 and the fingertip seal 3, so that the accuracy of a detection result is ensured; the connecting blocks 21 are preferably uniformly distributed along the circumferential direction of the outer cylinder 2, and the transverse pushing assembly pushes the outer cylinder 2 to move through the connecting blocks 21 by rotating the outer cylinder 2, so that rigidification rates and hysteresis rates of the fingertip seals 3 in different directions can be measured; specifically, in order to ensure the connection stability between the connection block 21 and the push rod 42, the end surface of the connection block 21 facing the push rod 42 is preferably provided with a positioning groove, and the end surface of the push rod 42 facing the connection block 21 is preferably provided with a positioning protrusion matched with the positioning groove; in other embodiments, a positioning protrusion may be disposed on an end surface of the connection block 21 facing the push rod 42, and correspondingly, a positioning groove matched with the positioning protrusion is disposed on an end surface of the push rod 42 facing the connection block 21, so that a stable connection between the connection block 21 and the push rod 42 may be ensured.
Referring to fig. 2, the pushing rod 42 is divided into a first section and a second section along an axial direction thereof; the force detection assembly 5 is arranged between the first section and the second section and is respectively connected with the first section and the second section, so that the pressure applied to the outer cylinder 2 by the transverse pushing assembly can be accurately measured; in other embodiments, the force detection assembly 5 may be provided at the end of the push rod 42; the force detection unit 5 is preferably an S-type load cell or a pressure sensor, so as to accurately measure the pressure of the push rod 42 against the outer cylinder 2.
In this embodiment, referring to fig. 1 and 2, the suspension assembly includes a support plate 11 fixed on the inner cylinder 1, and the support plate 11 is fixedly connected with the inner cylinder 1; the outer cylinder 2 is provided with an air suspension block 22, and the air suspension block 22 is fixedly connected with the outer cylinder 2 through bolts; an air suspension cavity 23 is formed between the air suspension block 22 and the supporting plate 11, and the air suspension block 22 is in sliding sealing connection with the supporting plate 11, namely, when the outer cylinder 2 moves relative to the inner cylinder 1, the air suspension cavity 23 is always in a sealing state; the supporting plate 11 is provided with an air inlet 12 communicated with the air suspension cavity 23, the air inlet 12 is connected with a first air source, the first air source can input air into the air suspension cavity 23, and the air in the air suspension cavity 23 can support the outer cylinder 2; specifically, the number of the air suspension cavities 23 is several, the air suspension cavities 23 are uniformly distributed along the circumferential direction of the outer cylinder 2, and the first air source can simultaneously inflate the air suspension cavities 23 to ensure uniform air intake and ensure that the outer cylinder 2 is stably in a suspension state; further, the displacement detection assembly is preferably set as a dial indicator, the dial indicator is fixed on the supporting plate 11, and a measuring head of the dial indicator is abutted against the air suspension block 22, so that the moving distance of the air suspension block 22 relative to the supporting plate 11 can be measured in real time, namely the moving distance of the outer cylinder 2 relative to the inner cylinder 1; in other embodiments, the suspension assembly position may be a cylinder or an electric push rod, so as to support the outer cylinder 2 to counteract the gravity of the outer cylinder 2, so that no vertical friction force exists between the outer cylinder 2 and the fingertip seal 3; the movement detection unit may be a distance sensor or a linear displacement sensor, so as to accurately measure the movement distance of the outer cylinder 2 relative to the inner cylinder 1; specifically, the first air source may be set as an air compressor or an air pump.
In this embodiment, referring to fig. 1 and 2, flanges 24 are provided at the upper end and the lower end of the outer cylinder 2; specifically, the outer cylinder 2 comprises a middle cylinder 25, and baffle plates 26 welded with the middle cylinder 25 are arranged at two ends of the middle cylinder 25; the fingertip seal 3 is embedded between the flange 24 and the middle cylinder 25, and the flange 24 can effectively fasten the fingertip seal 3, so that the sealing effect is improved; further, the flange 24 is fixedly connected with the baffle 26 through screws, a sealing ring 27 is embedded between the flange 24 and the baffle 26, and the sealing ring 27 can improve the tightness between the flange 24 and the baffle 26.
In this embodiment, referring to fig. 1 and 2, the inner wall surface of the inner cylinder 1 is provided with a plurality of two-way connectors 13, preferably, the plurality of two-way connectors 13 are uniformly distributed along the circumferential direction of the inner cylinder 1, and the second air source simultaneously supplies air into the sealed chamber 31 through the plurality of two-way connectors 13, so that air supply uniformity can be ensured, and errors caused by uneven air supply can be reduced; one end of the two-way joint 13 is communicated with the sealing chamber 31, and the other end of the two-way joint 13 is connected with a second air source which can flush air into the sealing chamber 31 to keep the air pressure in the sealing chamber 31 at a specific value; in particular, the second air source may be provided as an air compressor or an air pump.
On the basis of the foregoing embodiment, referring to fig. 2, the air pressure detecting assembly 6 is set as an air pressure gauge, and the air pressure gauge is disposed on the outer peripheral surface of the outer cylinder 2, and is communicated with the sealing chamber 31, so as to measure the air pressure value in the sealing chamber 31 in real time; in other embodiments, the air pressure detecting unit 6 may be an air pressure sensor, so as to accurately measure the air pressure in the sealed chamber 31.
The specific measurement mode of the utility model is as follows:
referring to fig. 1 and 2, an outer cylinder 2 is sleeved on an inner cylinder 1, a fingertip seal 3 is embedded between the outer cylinder 2 and the inner cylinder 1, and the fingertip seals 3 at the upper end and the lower end of a gap are fastened through flanges 24; the first air source is used for inflating the air suspension cavity 23 to enable the outer cylinder 2 to be in a suspension state; inflating the sealed chamber 31 by using a second air source to enable the pressure in the sealed chamber 31 to reach and be stabilized at a preset value, and displaying the air pressure value in the sealed chamber 31 in real time by the air pressure detection assembly 6; rotating the hand wheel 43 to enable the outer cylinder 2 to transversely move, and recording the moving distance detected by the displacement detection assembly and the pressure value detected by the force detection assembly 5;
the steps are repeated, the pressure value of the transverse pushing component applied to the outer cylinder 2 when the sealing chamber 31 is at different air pressure values and the outer cylinder 2 is at different moving distances is recorded, and the pressure Cheng Gangdu, the return stiffness and the hysteresis rate of the fingertip seal 3 in the direction can be calculated through a plurality of experimental values;
further, the outer cylinder 2 is rotated, the above steps are repeated, the pressure values of other positions of the fingertip seal 3 in the circumferential direction at different air pressure values and different moving distances are respectively measured, the pressure Cheng Gangdu, the return stiffness and the hysteresis rate of the fingertip seal 3 in the direction can be calculated, and the measuring accuracy is improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. Fingertip seal inspection frock, its characterized in that includes:
an outer cylinder is sleeved outside the inner cylinder, a gap is formed between the inner cylinder and the outer cylinder, and fingertip seals are arranged at two ends of the gap; the outer wall of the inner cylinder, the inner wall of the outer cylinder and the two fingertips are sealed to form a sealing cavity;
the suspension assembly is arranged between the inner cylinder and the outer cylinder; the suspension assembly can apply upward bearing force to the outer cylinder so as to reduce friction force between the outer cylinder and the fingertip seal in the vertical direction;
the transverse pushing assembly can drive the outer cylinder to transversely move relative to the inner cylinder;
the force detection assembly is used for measuring the pressure applied to the outer cylinder by the transverse pushing assembly;
the air pressure detection component is used for measuring the air pressure of the sealed cavity;
and the displacement detection assembly is used for measuring the moving distance of the outer cylinder relative to the inner cylinder.
2. The fingertip seal inspection tool according to claim 1, further comprising a base, wherein a plurality of circumferentially arranged equal-height cushion blocks are arranged on the base, and the inner cylinder is fixed on the equal-height cushion blocks.
3. The tool for inspecting fingertip seals according to claim 2, wherein the transverse pushing assembly comprises a supporting seat fixed on the base, a pushing rod in threaded connection with the supporting seat is arranged on the supporting seat, and a hand wheel for driving the pushing rod to rotate is connected with the pushing rod.
4. The fingertip seal inspection tool according to claim 3, wherein a plurality of connecting blocks are arranged on the outer peripheral surface of the outer cylinder; when the transverse pushing assembly drives the outer cylinder to transversely move relative to the inner cylinder, the end face of the pushing rod is abutted to the connecting block.
5. The fingertip seal inspection tool according to claim 4, wherein the pushing rod and the connecting block are arranged along the radial direction of the outer cylinder; and/or the end face of the connecting block facing the pushing rod is provided with a positioning groove, and the end face of the pushing rod facing the connecting block is provided with a positioning protrusion matched with the positioning groove.
6. The tool for inspecting fingertip seals according to any one of claims 3 to 5, wherein the pushing rod is divided into a first section and a second section along an axial direction thereof; the force detection assembly is disposed between the first section and the second section.
7. The fingertip seal inspection tool according to claim 2, wherein the suspension assembly comprises a support plate fixed on the inner cylinder, an air suspension block is arranged on the outer cylinder, an air suspension cavity is formed between the air suspension block and the support plate, and the air suspension block is in sliding sealing connection with the support plate; the support plate is provided with an air inlet communicated with the air suspension cavity, and the air inlet is connected with a first air source; the displacement detection assembly is arranged between the outer cylinder and the supporting plate.
8. The fingertip seal inspection tool according to claim 1 or 7, wherein flanges are provided at the upper end and the lower end of the outer cylinder; the outer cylinder comprises a middle cylinder, baffles are arranged at two ends of the middle cylinder, fingertips are embedded between the flange and the middle cylinder in a sealing mode, the flange is abutted to the baffles, and a sealing ring is embedded between the flange and the baffles.
9. The fingertip seal inspection tool according to claim 1, wherein a plurality of two-way connectors are arranged on the inner wall surface of the inner cylinder, one end of each two-way connector is communicated with the sealing chamber, and the other end of each two-way connector is connected with a second air source.
10. The tool according to claim 1 or 9, wherein the air pressure detecting component is an air pressure gauge, the air pressure gauge is arranged on the outer peripheral surface of the outer cylinder, and the air pressure gauge is communicated with the sealing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321496148.XU CN220120337U (en) | 2023-06-13 | 2023-06-13 | Fingertip seal inspection tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321496148.XU CN220120337U (en) | 2023-06-13 | 2023-06-13 | Fingertip seal inspection tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220120337U true CN220120337U (en) | 2023-12-01 |
Family
ID=88913168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321496148.XU Active CN220120337U (en) | 2023-06-13 | 2023-06-13 | Fingertip seal inspection tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220120337U (en) |
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2023
- 2023-06-13 CN CN202321496148.XU patent/CN220120337U/en active Active
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