CN109916276B - High-pressure rotor inner hole concentricity measuring instrument - Google Patents
High-pressure rotor inner hole concentricity measuring instrument Download PDFInfo
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- CN109916276B CN109916276B CN201910279410.7A CN201910279410A CN109916276B CN 109916276 B CN109916276 B CN 109916276B CN 201910279410 A CN201910279410 A CN 201910279410A CN 109916276 B CN109916276 B CN 109916276B
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- 238000005188 flotation Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000007667 floating Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 2
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Abstract
The invention provides a high-pressure rotor inner hole concentric measuring instrument, which belongs to the field of detection equipment and comprises an air floatation rotary table, a connecting sleeve, a measuring rod and a sensor, wherein the air floatation rotary table comprises a rotary body and a fixed shaft sleeve, the measuring rod is detachably and vertically fixedly arranged at the lower end of the rotary body, the sensor is embedded in the measuring rod and is correspondingly arranged with the inner section of a high-pressure rotor, the connecting sleeve is fixedly connected with the lower end of the fixed shaft sleeve, and the connecting sleeve is arranged on the outer ring of the rotary body and is fixedly arranged at the upper end of the high-pressure rotor. The invention can rapidly and accurately measure the concentricity of the high-pressure rotor, and is convenient and quick to operate.
Description
Technical Field
The invention belongs to the field of detection equipment, relates to measurement equipment of a high-pressure rotor of an aero-engine, and particularly relates to a high-pressure rotor inner hole concentricity measuring instrument of an air floatation structure.
Background
The aeroengine is a highly complex and precise thermodynamic machine, provides power required by flight for an aircraft, directly influences the performance, reliability and economy of the aircraft, and the high-pressure rotor is an important part of the aeroengine, and in the working state, the high-pressure rotor runs at an ultrahigh speed and the concentricity of the high-pressure rotor must be ensured, so that the concentricity measurement of the high-pressure rotor of the aeroengine is very important, and a convenient and efficient measurement method does not exist at present.
If the traditional structure is adopted, the precision of the structure cannot be guaranteed, the matching precision of the detection structure is far lower than that of the detected part, the measurement structure is meaningless, the quality of the part cannot be judged, and if the three-coordinate part detection is adopted, the equipment is expensive, the operation is troublesome, and the working efficiency is low.
Disclosure of Invention
The invention aims to solve the problem of providing a high-pressure rotor inner hole concentricity measuring instrument which can quickly and accurately measure the concentricity of a high-pressure rotor and is convenient and quick to operate.
In order to solve the technical problems, the invention adopts the following technical scheme: the high-pressure rotor inner hole concentric measuring instrument comprises an air floatation rotary table, a connecting sleeve, a measuring rod and a sensor, wherein the air floatation rotary table comprises a rotary body and a fixed shaft sleeve, the measuring rod is detachably and vertically fixedly arranged at the lower end of the rotary body, and the sensor is embedded in the measuring rod and is arranged corresponding to the inner section of the high-pressure rotor;
The connecting sleeve is fixedly connected with the lower end of the fixed shaft sleeve and the lower end of the fixed shaft sleeve, and the connecting sleeve is arranged on the outer ring of the rotating body and is fixed to the upper end of the high-pressure rotor.
Further, the measuring rod stretches into the inner ring of the high-pressure rotor, a gap is formed between the measuring rod and the inner ring of the high-pressure rotor, and the measuring rod and the high-pressure rotor are coaxially arranged.
Further, be equipped with a plurality of constant head tanks at least on the measuring stick, one the constant head tank matches and sets up one the sensor, the sensor is established in the constant head tank and with measuring stick detachable fixed connection, every the constant head tank is close to the one end of sensor inductive head all is equipped with the convenience the clearance groove that the sensor was installed usefulness.
Further, the measuring rod is of a hollow cylindrical structure.
Further, the connecting sleeve and the high-pressure rotor are coaxially arranged, a position avoidance T-shaped groove is formed in the connecting sleeve, the part, protruding out of the fixed shaft sleeve, of the rotating body is arranged at the upper end of the position avoidance T-shaped groove, the connecting sleeve and the high-pressure rotor are coaxially arranged, and the measuring rod penetrates through the lower end of the position avoidance T-shaped groove and is connected with the rotating body.
Further, the lower extreme of adapter sleeve is the locking end, be equipped with on the locking end and divide into the decurrent locking groove of opening of at least two parts with it, the locking end includes the straightway of upper end and the arc section of lower extreme, the diameter of arc section reduces downwards gradually, the outer lane of locking end is equipped with the lock female, the upper end of lock female with straightway threaded connection, the lower extreme of nut with the laminating of arc section sets up.
Furthermore, the number of the locking grooves is three, and the locking grooves are uniformly distributed relative to the axis of the connecting sleeve.
Further, the inner ring of the connecting sleeve is provided with a shoulder for positioning the upper end of the high-pressure rotor.
Further, the device also comprises a control unit for receiving detection data signals of the sensor.
Further, the control unit transmits the detection data signal to the data processing module and controls the operation of the data processing module, the control center controls the display module to display the result of the data processing module, and the control unit adopts PLC control.
Compared with the prior art, the invention has the following advantages and positive effects.
1. The rotating body can drive the measuring rod to rotate, then, the sensor can realize the test of the inner hole surface of the high-pressure rotor in the process of rotating together, meanwhile, the clamping and positioning of the high-pressure rotor are realized through the arrangement of the connecting sleeve, the whole structure takes the air floatation rotating table as a reference, only two parts which are directly and fixedly connected with the connecting sleeve and the measuring rod are involved, the parts are few, the structure is simple, the high-precision machining cost is low, the cost is reduced, the precision is easier to ensure, the assembly is convenient, the debugging of the assembled measuring instrument is also more convenient and quicker, the whole precision is high, and the precision of the measuring result is ensured;
2. the number and the set positions of the sensors are determined according to the actual measured high-pressure rotor specifications, the inner hole surfaces of different rotors to be measured are different, the heights of the sensors are set in a targeted mode, and the measurement of the different high-pressure rotors can be realized by changing the specifications of the measuring rod;
3. The locking end and the locking nut are arranged, and in the process of disassembling and replacing the high-voltage rotor, only the locking nut is required to be adjusted, other parts are not moved, so that the superposition accuracy of repeated positioning is ensured, the secondary correction of the measuring instrument is avoided, and the testing efficiency is improved;
4. the inner ring of the connecting sleeve is provided with a shoulder for positioning the upper end of the high-pressure rotor, when the high-pressure rotor is replaced for testing, the high-pressure rotor can be rapidly positioned, the same positioning of the high-pressure rotor each time is guaranteed, the gravity center adjustment and calibration of the whole measuring instrument are avoided, the efficiency of the reciprocating testing is improved, the superposition precision of the reciprocating operation is improved, and the accuracy of the measuring result is guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the high pressure rotor bore concentric gauge of the present invention;
FIG. 2 is a cross-sectional view of the high pressure rotor bore concentricity measuring instrument of the present invention;
FIG. 3 is a detail view of section A of FIG. 1 in accordance with the present invention;
FIG. 4 is a schematic top view of the connecting sleeve of the present invention;
FIG. 5 is a schematic bottom view of the connecting sleeve of the present invention;
Fig. 6 is a schematic structural diagram of the high-pressure rotor bore concentric measuring instrument in actual operation.
Reference numerals:
1. An air-floating rotary table; 11. fixing the shaft sleeve; 12. a rotating body; 2. connecting sleeves; 21. a clearance T-shaped groove; 22. a locking end; 221. a straight line segment; 222. an arc section; 223. a locking groove; 224. a shoulder; 3. locking a nut; 4. a measuring rod; 41. a positioning groove; 42. a clearance groove; 5. a sensor; 6. a high pressure rotor.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 6, the invention discloses a concentric measuring instrument for an inner hole of a high-pressure rotor, which comprises an air-floating rotary table 1, a connecting sleeve 2, a measuring rod 4 and a sensor 5, wherein the air-floating rotary table 1 comprises a rotary table 12 and a fixed shaft sleeve 11, the measuring rod 4 is detachably and vertically fixedly arranged at the lower end of the rotary table 12, the sensor 5 is embedded in the measuring rod 4 and is correspondingly arranged with the inner section of the high-pressure rotor 6, the connecting sleeve 2 is fixedly connected with the lower end of the fixed shaft sleeve 11, the connecting sleeve 2 is arranged at the outer ring of the rotary table 12 and is fixedly arranged at the upper end of the high-pressure rotor 6, the rotary table 12 can drive the measuring rod 4 to rotate, then, the sensor 5 can realize the test of the inner hole surface of the high-pressure rotor 6 in the process of rotating together, and meanwhile, the whole structure takes the air-floating rotary table 1 as a reference, and only relates to two parts which are directly and fixedly connected with each other, so that the measuring instrument has the advantages of simple structure, high precision processing cost, low cost, easy guarantee, convenience in assembly, high precision, convenience, and high precision, and high debugging precision.
The application of the air floatation rotary table 1 is wider and wider, the friction force between two parts can be greatly reduced, the stability of the relative motion of the parts is ensured, the energy consumption is saved, the working principle of air floatation is that an air floatation channel is arranged on the lower part, the air is blown upwards through the air floatation channel, the friction force between the upper part and the lower part is greatly reduced under the action of air, the micro-adjustment of the upper part is facilitated, and the precision is high.
Preferably, the measuring rod 4 stretches into the inner ring of the high-pressure rotor 6 and is provided with a gap between the inner ring and the high-pressure rotor, so that the non-contact sensor 5 is convenient to install, the measuring rod 4 and the high-pressure rotor 6 are coaxially arranged, and accuracy of concentricity test data is guaranteed.
Preferably, the measuring rod 4 is provided with at least a plurality of positioning grooves 41, one positioning groove 41 is matched with one sensor 5, the sensor 5 is arranged in the positioning groove 41 and is detachably and fixedly connected with the measuring rod 4, one end of each positioning groove 41, which is close to a sensing head of the sensor 5, is provided with a clearance groove 42 for facilitating the installation of the sensor 5, the sensor 5 can be in contact or non-contact type, the selection and the determination are carried out according to the measurement precision, the number and the set positions of the sensors 5 are determined according to the actual measured specifications of the high-voltage rotor 6, the inner hole surfaces required to be measured of different rotors are different, the height of the sensor 5 is correspondingly set, the measurement of the different high-voltage rotor 6 can be realized by changing the specifications of the measuring rod 4, the measuring rod 4 and the rotating body 12 can be directly in threaded connection, and also can be detachably connected in a screw fixing mode, and the measuring rod is simple in structure and convenient in operation; more preferably, the measuring rod 4 is of a hollow cylindrical structure, is convenient to select materials, has low cost and high strength, is convenient to process, and can reduce the load of the rotating body 12.
Preferably, the connecting sleeve 2 and the high-pressure rotor 6 are coaxially arranged, the connecting sleeve 2 is internally provided with a position-avoiding T-shaped groove 21, the part of the rotating body 12 protruding out of the fixed shaft sleeve 11 is arranged at the upper end of the position-avoiding T-shaped groove 21 and is coaxially arranged, the measuring rod 4 passes through the lower end of the position-avoiding T-shaped groove 21 to be connected with the rotating body 12, the structure is simple and compact, the connecting structure is built-in, and the appearance is more attractive.
Preferably, the lower end of the connecting sleeve 2 is a locking end 22, the locking end 22 is provided with a locking groove 223 which divides the locking end into at least two parts and has a downward opening, the locking end 22 comprises a straight line section 221 at the upper end and an arc section 222 at the lower end, the diameter of the arc section 222 is gradually reduced downwards, the outer ring of the locking end 22 is provided with a lock nut 3, the upper end of the lock nut 3 is in threaded connection with the straight line section 221, the lower end of a nut is in fit with the arc section 222, the lock nut 3 is tightly pressed on the arc section 222 in the process of continuously locking the nut, the arc section 222 is stressed and tightened, the clamping and fixing of the upper end of the high-voltage rotor 6 are completed, the operation is convenient and quick, and as the lock nut 3 is only required to be adjusted in the process of disassembling and replacing the high-voltage rotor 6, the superposition accuracy of repeated positioning is ensured, secondary correction of the measuring instrument is avoided, and the test efficiency is improved; more preferably, the number of the locking grooves 223 is three and the locking grooves are uniformly distributed relative to the axle center of the connecting sleeve 2, so that the locking device is simple in structure and more beneficial to locking on the premise of ensuring the strength.
Preferably, the inner ring of the connecting sleeve 2 is provided with a shoulder 224 for positioning the upper end of the high-pressure rotor 6, so that the high-pressure rotor 6 can be rapidly positioned when being replaced for testing, the same positioning of the high-pressure rotor 6 each time is ensured, the gravity center adjustment and calibration of the whole measuring instrument are avoided, the efficiency of the reciprocating test is improved, the superposition precision of the reciprocating operation is improved, and the accuracy of the measuring result is ensured.
Preferably, the device further comprises a control unit for receiving detection data signals of the sensor 51, wherein the sensor 51 can adopt a precise circular grating sensor 51 to complete timely acquisition and processing of data; more preferably, the control unit transmits the detection data signal to the data processing module and controls the operation of the data processing module, the control center controls the display module to display the result of the data processing module, the roundness measuring and analyzing module is adopted in the data processing module, and the control unit is controlled by the PLC, so that the programming is simple and the operation is convenient.
In the actual working process, the air-float rotary table 1 is arranged on the fixing device, the air-float rotary table 1 is fixed on the upper part of the tested aero-engine high-pressure rotor 6 through the connecting sleeve 2, the lock nut 3 is locked, the measuring rod 4 is connected to the rotary body 12 of the air-float rotary table 1, the plurality of sensors 5 are arranged on the measuring rod 4 and face the inner hole surface of the tested aero-engine high-pressure rotor 6, the rotary body 12 rotates to drive the sensors 5 on the measuring rod 4 to rotate, the roundness and the eccentricity of each measuring inner hole surface relative to the rotary shaft of the air-float rotary table 1 are measured, the concentricity measuring data of each inner hole surface of the high-pressure rotor 6 can be obtained through calculation, the structure reuses the high precision and the motion principle of the air-float rotary table 1, the air-float rotary table 1 can adopt the product of I department, the structure can rapidly and accurately measure the concentricity of the high-pressure rotor 6, the structure is convenient and rapid to operate, after one test is completed, the nut can be rapidly loosened, the installation and the next high-pressure rotor 6 is conveniently disassembled, and the test efficiency is improved.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (7)
1. The concentric measuring apparatu of high pressure rotor hole, its characterized in that: the air flotation rotary table comprises a rotary body and a fixed shaft sleeve, the measuring rod is detachably and vertically fixedly arranged at the lower end of the rotary body, and the sensor is embedded in the measuring rod and is arranged corresponding to the inner section of the high-pressure rotor;
the connecting sleeve is fixedly connected with the lower end of the fixed shaft sleeve, is arranged on the outer ring of the rotating body and is fixed to the upper end of the high-pressure rotor;
The measuring rod extends into the inner ring of the high-voltage rotor, a gap is arranged between the measuring rod and the inner ring of the high-voltage rotor, and the measuring rod and the high-voltage rotor are coaxially arranged;
the measuring rod is provided with at least a plurality of positioning grooves, one positioning groove is matched with the other sensor, the sensor is arranged in the positioning groove and is detachably and fixedly connected with the measuring rod, one end of each positioning groove, which is close to the sensor sensing head, is provided with a clearance groove for facilitating the installation of the sensor, the sensor measures the roundness and the eccentricity of each measuring inner hole surface relative to the rotating shaft of the air floatation turntable, and concentricity measuring data of each inner circle surface of the high-voltage rotor are obtained through calculation;
The measuring rod is of a hollow cylindrical structure.
2. The high pressure rotor bore concentric gauge of claim 1, wherein: the connecting sleeve and the high-pressure rotor are coaxially arranged, a position avoidance T-shaped groove is formed in the connecting sleeve, the part, protruding out of the fixed shaft sleeve, of the rotating body is arranged at the upper end of the position avoidance T-shaped groove, the connecting sleeve and the high-pressure rotor are coaxially arranged, and the measuring rod penetrates through the lower end of the position avoidance T-shaped groove and is connected with the rotating body.
3. The high pressure rotor bore concentric gauge of claim 2, wherein: the lower extreme of adapter sleeve is the locking end, be equipped with on the locking end and divide into the decurrent locking groove of opening of at least two parts with it, the locking end includes the straightway of upper end and the arc section of lower extreme, the diameter of arc section reduces downwards gradually, the outer lane of locking end is equipped with the lock female, the upper end of lock female with straightway threaded connection, the lower extreme of lock female with the laminating of arc section sets up.
4. A high pressure rotor bore concentric gauge as claimed in claim 3, wherein: the number of the locking grooves is three, and the locking grooves are uniformly distributed relative to the axis of the connecting sleeve.
5. A high pressure rotor bore concentric gauge as claimed in claim 3, wherein: the inner ring of the connecting sleeve is provided with a shoulder for positioning the upper end of the high-pressure rotor.
6. A high pressure rotor bore concentric measuring instrument according to any one of claims 1 to 3, characterized in that: the control unit is also included for receiving the detection data signals of the sensor.
7. The high pressure rotor bore concentric gauge of claim 6, wherein: the control unit transmits the detection data signals to the data processing module and controls the operation of the data processing module, the control center controls the display module to display the result of the data processing module, and the control unit adopts PLC control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910279410.7A CN109916276B (en) | 2019-04-08 | 2019-04-08 | High-pressure rotor inner hole concentricity measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910279410.7A CN109916276B (en) | 2019-04-08 | 2019-04-08 | High-pressure rotor inner hole concentricity measuring instrument |
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| CN109916276A CN109916276A (en) | 2019-06-21 |
| CN109916276B true CN109916276B (en) | 2024-07-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111289030B (en) * | 2020-03-07 | 2022-03-18 | 中国计量科学研究院 | Capacitive sensor stability testing device |
| CN114088046B (en) * | 2021-11-15 | 2023-03-24 | 北京航空航天大学 | Aeroengine detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643466A (en) * | 2016-12-28 | 2017-05-10 | 中船重工（西安）东仪精密测量科技有限公司 | Bridge type cylindricity measuring device and work method thereof |
| CN209605747U (en) * | 2019-04-08 | 2019-11-08 | 天津中精微仪器设备有限公司 | The concentric measuring instrument of high pressure rotor inner hole |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7912587B2 (en) * | 2007-07-25 | 2011-03-22 | Pratt & Whitney Canada Corp. | Method of balancing a gas turbine engine rotor |
| CN103808252B (en) * | 2014-02-14 | 2015-07-08 | 哈尔滨工业大学 | Air floatation assembling method and device based on gantry structure for rotors of aero-engine |
| CN104354135B (en) * | 2014-10-29 | 2016-01-27 | 哈尔滨工业大学 | Aero-engine turns stator and assembles/measure five degree of freedom adjustment localization method and device |
| CN105423876B (en) * | 2015-10-15 | 2018-10-19 | 哈尔滨工业大学 | Large high-speed revolution equipment alignment measurement method and device based on tolerance regulation and control |
| CN105443169B (en) * | 2015-11-11 | 2017-04-19 | 上海交通大学 | Device and method for assembling multi-stage drum type rotor of aero-engine |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643466A (en) * | 2016-12-28 | 2017-05-10 | 中船重工（西安）东仪精密测量科技有限公司 | Bridge type cylindricity measuring device and work method thereof |
| CN209605747U (en) * | 2019-04-08 | 2019-11-08 | 天津中精微仪器设备有限公司 | The concentric measuring instrument of high pressure rotor inner hole |
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