CN209877930U - Blade tip clearance measuring device for double-layer casing - Google Patents
Blade tip clearance measuring device for double-layer casing Download PDFInfo
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- CN209877930U CN209877930U CN201920530632.7U CN201920530632U CN209877930U CN 209877930 U CN209877930 U CN 209877930U CN 201920530632 U CN201920530632 U CN 201920530632U CN 209877930 U CN209877930 U CN 209877930U
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Abstract
The application relates to a apex clearance measuring device for double-deck machine casket, double-deck machine casket includes outer machine casket and interior machine casket, and outer machine casket has the opening, and interior machine casket has the probe mounting hole, has the clearance between outer machine casket and the interior machine casket, and the inboard of interior machine casket has at least one rotor blade, and apex clearance side device includes: the lead wire seat is provided with at least one lead wire hole and is fixed at the opening of the outer casing; the sensor is provided with a sensor probe, the sensor penetrates through the lead hole, and the sensor probe is arranged in the probe mounting hole of the inner casing; and the fixed cover plate is arranged at the probe mounting hole of the inner casing and used for fixing the sensor probe. The blade tip clearance measuring device realizes measurement of the blade tip clearance of the double-layer casing corresponding to the rotor blade, and solves the problem that the measurement position cannot be measured for a long time in the development of the high-pressure compressor.
Description
Technical Field
The application belongs to the technical field of aeroengine measurement, and particularly relates to a blade tip clearance measuring device for a double-layer casing.
Background
The blade tip clearance of the rotor and the stator of the aero-engine has important influence on the stability of the structure and the performance of the compressor, and the reasonable blade tip clearance can reduce the occurrence of the rotor and the stator rubbing phenomenon. In order to ensure the use safety of the aero-engine, the blade tip clearance data needs to be effectively measured in the trial run stage, and data support is provided for the optimal design of the engine and the improvement of the performance of the engine.
As shown in fig. 1, the rotor blade 101 is installed in a casing 104 between a front stator blade 102 and a rear stator blade 103, the tip clearance measuring device is composed of a sensor 106 and a sensor fixing cover plate 105, and the fixing cover plate 105 fixes the tip of the sensor 106 in a measuring hole formed in the casing 104. When the blade tip clearance is measured, the end face of the sensor retracts into the casing 104, and the blade is prevented from being abraded.
The conventional tip clearance measuring device can realize measurement of the tip clearance of a single-layer casing corresponding to the rotor blade 101, while the rear stages of rotor blades of the high-pressure compressor of the aircraft engine correspond to double-layer casings, and the conventional tip clearance measuring device cannot measure the tip clearance of the rear stages of rotor blades of the high-pressure compressor under high-speed operation and cannot obtain accurate tip clearance data.
Disclosure of Invention
It is an object of the present application to provide a tip clearance measurement device for a double-deck case that addresses at least one of the problems discussed above.
The technical scheme of the application is as follows: a tip clearance measurement device for a dual layer case comprising an outer case having an opening and an inner case having a probe mounting hole with a clearance therebetween, the inner side of the inner case having at least one rotor blade, the tip clearance side device comprising:
the lead wire seat is provided with at least one lead wire hole and is fixed at the opening of the outer casing;
a sensor having a sensor probe, the sensor passing through the lead hole, the sensor probe disposed within the probe mounting hole of the inner case;
and the fixed cover plate is arranged at the probe mounting hole of the inner casing and is used for fixing the sensor probe.
In an embodiment of the present application, the shape of the lead frame includes one of a circle, a rectangle, or a regular polygon, and the opening has an opening shape adapted to the shape of the lead frame.
In one embodiment of the present application, the lead frame has a plurality of lead holes, and the plurality of lead holes are regularly arranged on the lead frame.
In an embodiment of the present application, apex clearance measuring device still includes the lead wire blanking cover, the lead wire blanking cover is equipped with and is used for the sensor passes the assembly groove of lead wire blanking cover, lead wire blanking cover fixed mounting be in outside the pin hole of lead wire seat.
In an embodiment of the present application, apex clearance measuring device still includes the lead wire closure piece, the sensor passes lead wire closure piece, just the lead wire closure piece is fixed set up in the lead wire hole of lead wire seat.
In an embodiment of the present application, the tip clearance measuring apparatus further includes a filler, and the filler is filled between the lead block piece and the lead block cover in the lead hole.
In an embodiment of the present application, the blade tip clearance measuring device further includes a sealing gasket, and the sealing gasket is disposed in the detection hole of the fixed cover plate.
The utility model provides a apex clearance measuring device is through installing trompil on the lead wire seat on outer cartridge receiver for draw forth sensor metal cable, realize the fixed of cable, through seting up T shape probe mounting hole on the cartridge receiver including, realize the fixed of sensor probe, through drawing forth a structure, lead wire blanking cover, lead wire closure plate isotructure, metal cable's sealed and fixed problem has been solved, thereby realize the measurement of the double-deck cartridge receiver apex clearance that rotor blade corresponds, the difficult problem that this measuring position can' T be measured for a long time in high-pressure compressor development has been solved.
Drawings
In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
FIG. 1 is a schematic view of a prior art tip clearance measurement apparatus for a single-layer casing.
FIG. 2 is a schematic view of a blade tip clearance measurement device of a double-layer casing according to the present application.
Fig. 3 is a top view of a lead frame structure according to the present application.
Fig. 4 is an enlarged schematic view of the sensor probe and the inner casing according to the present application.
Reference numerals in the prior art:
101-rotor blade, 102-front stator blade, 103-rear stator blade, 104-casing, 105-fixed cover plate, 106-sensor;
reference numbers in this application:
201-outer casing, 202-inner casing, 203-first rotor blade, 204-second rotor blade, 205-third rotor blade, 206-sensor, 207-sensor probe, 208-sealing gasket, 209-fixing cover plate, 210-cover plate connector, 211-lead seat, 212-lead hole, 213-lead block, 214-filler, 215-lead block, 216-opening, 217-probe mounting hole, 218-assembly groove.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
In order to solve the problems that a double-layer casing is complex in structure and the blade tip clearance measuring device is difficult to install in the prior art, the application provides the blade tip clearance measuring device capable of achieving the correspondence of the rotor blades under the double-layer casing.
As shown in fig. 2 to 4, in the dual-layer casing tip clearance-side device of the present application, the dual-layer casing includes an outer casing 201 and an inner casing 202, the outer casing 201 is opened with an opening 216, the inner casing 202 is opened with a probe mounting hole 217, a clearance is provided between the outer casing 201 and the inner casing 202, and at least one rotor blade is provided inside the inner casing 202. The measuring device mainly comprises a lead wire seat 211, a sensor 206 and a fixed cover plate 209. The lead frame 211 has at least one lead hole 212, the lead hole 212 has a step for matching with the step of the sensor probe to achieve fixation, and the lead frame 211 is fixed at the opening 216 on the outer case 201. The sensor 206 has a sensor probe 207, the sensor probe 207 has a stepped portion, the tip of the sensor 206 is disposed in a probe mounting hole 217 of the inner case 202 through a lead hole 212, and the end face of the sensor probe 207 is parallel to the blade tip end face. The fixed cover plate 209 is installed at the position of the probe installation hole 217 of the inner casing 202, a through hole for the sensor probe 207 to pass through is arranged in the middle of the fixed cover plate, a step for pressing the sensor probe 207 on the end surface is arranged in the middle of the fixed cover plate, through holes for the cover plate connecting pieces 210 to pass through are arranged at four corners of the fixed cover plate, and the sensor probe 207 can be fixed on the inner casing 202 through the cover plate connecting pieces 210.
It should be noted that the cover plate connector 210 is a bolt in this application, so that a corresponding position on the inner casing 202 has a threaded hole to match with it. The probe mounting hole 217 provided in the outer casing 201 can be used as a lead-out hole for a test sensor, and can also be used as a high-pressure compressor airplane and an anti-icing lead-out hole.
In the test process, the end face of the sensor probe 207 is ensured to be retracted into the inner casing 202, so that the test run safety of the engine is ensured
In the present application, the shape of the lead holder 211 may be one of circular, rectangular or regular polygon, and accordingly, the shape of the opening 216 is adapted to the shape of the lead holder 211.
Further, the lead frame 211 may have a plurality of lead holes 212, and the plurality of lead holes 212 are regularly arranged on the lead frame 211. The regular arrangement is that the arrangement is carried out according to a certain rule, and the arrangement can be along a straight line, or can be annularly arranged along the circumferential direction of a circle center, and the like.
As shown in fig. 3, which is a schematic view of the structure of the lead frame 211 according to an embodiment of the present invention, the lead frame 211 in this embodiment is square, and has two lead holes 212, and the lead holes 212 are regularly arranged symmetrically with respect to a vertical center line. In another embodiment, the number of the lead holes 212 may be four, and the four lead holes 212 are arranged in the center.
In this embodiment, the lead holes 212 on the left side of the lead mount 211 pass through the sensor probe 207 and are mounted to the outside of the second rotor blade 204. When the first rotor blade 203 or the third rotor blade 205 needs to measure the tip clearance, the lead hole 212 on the right side of the lead frame 211 can also be provided with the sensor probe 207.
In the present application, the tip clearance measuring device further includes a lead block cover 215, the lead block cover 215 is substantially cylindrical, a mounting groove 218 is formed in the middle of the lead block cover 215 for the sensor 206 to pass through, the inner side surface of the lead block cover has internal threads capable of matching with external threads protruding from the lead hole 212 of the lead block 211 to realize fixed mounting outside the lead hole 212 of the lead block 211, and the lead block cover 215 can prevent foreign matters from entering the lead hole 212.
In the present application, the tip clearance measuring device further includes a lead tab 213, the lead tab 213 is fixedly disposed in the lead hole 212 of the lead base 211 and is perpendicular to the axis of the lead hole 212, and the metal wire portion of the sensor 206 passes through the lead tab 213. The lead hole 212 needs to pass through the sensor probe 207, and the diameter of the sensor probe 207 is larger than that of the metal wire part of the sensor, so that a larger gap is formed between the lead hole 212 and the metal wire of the sensor, and the lead blocking piece 213 arranged in the lead hole 212 can support the metal wire and prevent the metal wire from scraping.
In order to effectively fix the lead block piece 213, a step is provided in the substantially middle portion of the lead hole 212, the lead block piece 213 abuts on the step, a filler 214 is provided outside the lead block piece 213, and the filler 214 is filled between the lead block piece 213 and the lead block cover 215 in the lead hole 212. In some embodiments, the filler 214 may be rubber, foam, or glass cement, which can function as both a seal and an elastic buffer. In the case of filling with filler, the lead block 213 may also function to prevent the filler from overflowing into the bleed air cavity between the inner casing 202 and the outer casing 201.
In the present application, the tip clearance measuring device further includes a sealing pad 208, and the sealing pad 208 is disposed in a detection hole of the fixed cover plate 209, so as to further prevent foreign matters or impurities in the outside or the bleed air cavity from entering the working flow channel of the rotor blade.
The utility model provides a apex clearance measuring device is through installing trompil on the lead wire seat on outer cartridge receiver for draw forth sensor metal cable, realize the fixed of cable, through seting up T shape probe mounting hole on the cartridge receiver including, realize the fixed of sensor probe, through drawing forth a structure, lead wire blanking cover, lead wire closure plate isotructure, metal cable's sealed and fixed problem has been solved, thereby realize the measurement of the double-deck cartridge receiver apex clearance that rotor blade corresponds, the difficult problem that this measuring position can' T be measured for a long time in high-pressure compressor development has been solved. Lead wire seat in this application is independent with outer quick-witted casket, can change different lead wire seats according to the lead wire demand of difference, and is with low costs, and the application is strong.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A tip clearance measurement device for a double-deck casing comprising an outer casing (201) and an inner casing (202), the outer casing (201) having an opening (216), the inner casing (202) having a probe mounting hole (217), a clearance between the outer casing (201) and the inner casing (202), the inner side of the inner casing (202) having at least one rotor blade, characterized in that the tip clearance side arrangement comprises an outer casing (201) and an inner casing (202), the tip clearance side arrangement comprising at least one rotor blade, the tip clearance side arrangement comprising a tip clearance measuring device, a tip clearance
A lead block (211), the lead block (211) having at least one lead hole (212), the lead block (211) being fixed at an opening (216) of the outer casing (201);
a sensor (206), the sensor (206) having a sensor probe (207), the sensor (206) passing through the lead aperture (212), and the sensor probe (207) disposed within a probe mounting aperture (217) of the inner case (202);
a fixed cover plate (209), the fixed cover plate (209) is installed at a probe installation hole (217) of the inner casing (202) for fixing the sensor probe (207).
2. The tip clearance measuring device for a double-deck casing according to claim 1, wherein the shape of the lead block (211) comprises one of a circle, a rectangle, or a regular polygon, and the opening (216) has an opening shape adapted to the shape of the lead block (211).
3. The tip clearance measuring device for the double-deck casing according to claim 2, wherein the lead frame (211) has a plurality of lead holes (212), and the plurality of lead holes (212) are regularly arranged on the lead frame (211).
4. The tip clearance measuring device for a double-deck casing according to claim 1, further comprising a lead block cover (215), wherein the lead block cover (215) is provided with a fitting groove (218) for the sensor (206) to pass through the lead block cover (215), and the lead block cover (215) is fixedly installed outside the lead hole (212) of the lead block (211).
5. The blade tip clearance measuring device for a double-deck casing according to claim 1, further comprising a lead tab (213), wherein the sensor (206) passes through the lead tab (213), and the lead tab (213) is fixedly disposed in the lead hole (212) of the lead frame (211).
6. The tip clearance measuring device for a double-deck casing according to any one of claims 4 or 5, further comprising a filler (214), wherein the filler (214) is filled between the lead block piece (213) and the lead block cover (215) in the lead hole (212).
7. The tip clearance measuring device for a double-deck casing according to claim 1, further comprising a gasket (208), wherein the gasket (208) is disposed in a probe hole at the stationary cover plate (209).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920530632.7U CN209877930U (en) | 2019-04-18 | 2019-04-18 | Blade tip clearance measuring device for double-layer casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920530632.7U CN209877930U (en) | 2019-04-18 | 2019-04-18 | Blade tip clearance measuring device for double-layer casing |
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| Publication Number | Publication Date |
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| CN209877930U true CN209877930U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920530632.7U Active CN209877930U (en) | 2019-04-18 | 2019-04-18 | Blade tip clearance measuring device for double-layer casing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081799A (en) * | 2019-05-14 | 2019-08-02 | 中国航发沈阳发动机研究所 | A kind of Thin-Wall Outer Casing tip clearance measuring device |
| CN111609826A (en) * | 2020-06-08 | 2020-09-01 | 清华大学 | Method and device for measuring blade tip clearance of aircraft engine |
| CN113390379A (en) * | 2021-06-14 | 2021-09-14 | 中国航发沈阳发动机研究所 | Dynamic clearance measuring structure for rotor blade with multi-duct rotor-stator structure |
-
2019
- 2019-04-18 CN CN201920530632.7U patent/CN209877930U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081799A (en) * | 2019-05-14 | 2019-08-02 | 中国航发沈阳发动机研究所 | A kind of Thin-Wall Outer Casing tip clearance measuring device |
| CN110081799B (en) * | 2019-05-14 | 2021-05-28 | 中国航发沈阳发动机研究所 | Thin-wall casing blade tip clearance measuring device |
| CN111609826A (en) * | 2020-06-08 | 2020-09-01 | 清华大学 | Method and device for measuring blade tip clearance of aircraft engine |
| CN113390379A (en) * | 2021-06-14 | 2021-09-14 | 中国航发沈阳发动机研究所 | Dynamic clearance measuring structure for rotor blade with multi-duct rotor-stator structure |
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