Pneumatic-electric measuring instrument for valve bush of aero-engine

Abstract

The utility model relates to the technical field of measuring equipment, and particularly discloses a pneumoelectric measuring instrument for an aero-engine valve bush, which comprises a pneumatic electronic digital display micrometer, an inner diameter pneumatic measuring head and outer diameter pneumatic measuring equipment, the pneumatic electronic digital display micrometer is connected with an external compressed air source; the inner diameter pneumatic measuring head and the outer diameter pneumatic measuring equipment are connected with the pneumatic electronic digital display micrometer through two mutually independent pneumatic pipelines; a first pneumatic spray hole is formed in the inner diameter pneumatic measuring head; a tubular measuring hole is formed in the outer diameter pneumatic measuring device, and a second pneumatic spray hole is formed in the inner side wall of the tubular measuring hole. According to the utility model, the inner diameter and the outer diameter of the aero-engine valve bushing are measured by using a pneumoelectric measurement principle, so that the manual workload can be reduced, the detection efficiency and the accuracy are improved, and the safety and the reliability of an aero-engine are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring equipment, in particular to a gas-electric measuring instrument for a valve bushing of an aero-engine. Background Art

[0002] The measuring principle of the pneumatic and electrical measuring instrument is the comparative measurement method. The measuring method is to convert the size signal into the airflow signal, and then convert the air signal into the electrical signal through the pneumatic and electrical converter, which is indicated by the light column composed of the light-emitting tube. The pneumatic and electrical measuring instrument is a measuring instrument that can be assembled in multiple units. It can be matched with different pneumatic probes to measure multiple parameters. Pneumatic measuring instruments have been widely used in the machinery manufacturing industry because of their many advantages.

[0003] Aircraft engine valve bushing is a wear-resistant material used to protect the engine valve assembly. It is usually made of metal, plastic or composite materials and is designed to be used with the engine valve. The valve is the valve that controls the airflow into and out of the combustion chamber. The main function of the aircraft engine valve bushing is to reduce the friction and wear between the valve and the external environment.

[0004] If the dimensional error of the bushing is too large, the following effects will occur: it will cause poor cooperation with the engine valve, resulting in friction and noise; the combustion chamber of the aircraft engine requires precise control of airflow entering and exhausting. If the dimensional error of the bushing affects the accuracy of valve opening and closing, it will cause inaccurate flow control, thereby affecting the performance and combustion efficiency of the engine; it will cause leakage between the valve and the combustion chamber, thus affecting the performance and safety of the engine; it will cause a decrease in wear resistance, thereby shortening the service life of the bushing; it will cause additional vibration and noise when the engine is working, thus affecting passenger comfort and engine performance.

[0005] In order to ensure the safety and reliability of aircraft engines, strict testing and measurement are required during the manufacturing process to ensure that the dimensional error of the bushing is within the allowable range. Therefore, an instrument specifically used for measuring the valve bushing of aircraft engines is required. Utility Model Content

[0006] In order to solve the problems in the background technology, the utility model provides an aero-engine valve bushing gas-electric measuring instrument.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A pneumatic and electric measuring instrument for an aircraft engine valve bushing comprises a pneumatic electronic digital display micrometer, an inner diameter pneumatic measuring head and an outer diameter pneumatic measuring device; the pneumatic electronic digital display micrometer is connected to an external compressed air source, the inner diameter pneumatic measuring head and the outer diameter pneumatic measuring device are connected to the pneumatic electronic digital display micrometer through two independent pneumatic pipelines; the inner diameter pneumatic measuring head is provided with a first pneumatic spray hole; the outer diameter pneumatic measuring device is provided with a tubular measuring hole, and a second pneumatic spray hole is provided on the inner side wall of the tubular measuring hole.

[0009] Furthermore, the pneumatic electronic digital display micrometer is a dual-channel pneumatic electronic digital display micrometer, which is provided with a first channel air path outlet and a second channel air path outlet, which are respectively connected to the inner diameter pneumatic probe and the outer diameter pneumatic measuring device.

[0010] Furthermore, the inner diameter pneumatic probe includes a hand-held part and a sleeve part which are connected to each other, and the aircraft engine valve bushing is sleeved on the sleeve part for measurement; the number of the first pneumatic nozzles is two, which are symmetrically arranged on both sides of the sleeve part, and air flow channels are provided in the hand-held part and the sleeve part, connecting the pneumatic pipeline and the first pneumatic nozzle.

[0011] Furthermore, a first guide groove is formed on the surface of the sleeve portion around the first pneumatic spray hole.

[0012] Furthermore, the outer diameter pneumatic measuring device comprises a base, an outer diameter measuring platform is mounted on the base, and a tubular measuring hole is opened on the outer diameter measuring platform.

[0013] Furthermore, there are two second pneumatic nozzles, which are symmetrically arranged on the inner walls on both sides of the tubular measuring hole; the two second pneumatic nozzles correspond to two first joints respectively, and two second joints are arranged on the base, which are respectively connected to the two first joints through hoses; an air flow channel is opened inside the base to converge the two second joints and connect them to the third joint, and the third joint is connected to the pneumatic pipeline.

[0014] Furthermore, two placement slots are provided on the base for placing two standard parts, namely an upper limit standard part and a lower limit standard part.

[0015] Furthermore, a second guide groove is formed on the inner surface of the tubular measuring hole around the second pneumatic spray hole.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The utility model uses the pneumatic-electrical measurement principle to measure the inner diameter and outer diameter of the aero-engine valve bushing, which can reduce manual workload, improve detection efficiency and accuracy, and ensure the safety and reliability of the aero-engine.

[0018] 2. The utility model can measure the outer diameters of aero-engine valve bushings of different specifications by replacing outer diameter measuring tables of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the utility model of the gas-electric measuring instrument for the valve bushing of an aircraft engine;

[0020] Figure 2 It is a three-dimensional diagram of the inner diameter pneumatic measuring head of the utility model;

[0021] Figure 3 It is a three-dimensional diagram of the outer diameter pneumatic measuring device of the utility model;

[0022] Figure 4 This is the front view of the outer diameter pneumatic measuring device of the utility model;

[0023] Figure 5 for Figure 4 Cross-sectional view at AA in the middle.

[0024] In the figure: 100-pneumatic electronic digital display micrometer, 110-first channel air outlet, 120-second channel air outlet, 200-inner diameter pneumatic probe, 210-first pneumatic spray hole, 220-handheld part, 230-ferrule part, 240-first guide groove, 300-outer diameter pneumatic measuring equipment, 310-tubular measuring hole, 320-second pneumatic spray hole, 330-base, 331-placement groove, 332-standard parts, 340-outer diameter measuring table, 350-first joint, 360-second joint, 370-third joint, 380-second guide groove, 400-pneumatic pipeline connection. DETAILED DESCRIPTION

[0025] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0026] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0027] In the description of this embodiment, it should also be noted that, unless otherwise clearly specified and limited, the terms “set”, “connected” and “connected” should be understood in a broad sense.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Reference Figures 1 to 5 The present embodiment provides an aero-engine valve bushing pneumatic and electric measuring instrument, including a pneumatic electronic digital display micrometer 100, an inner diameter pneumatic probe 200 and an outer diameter pneumatic measuring device 300. The pneumatic electronic digital display micrometer 100 is a mature existing technology, and is used to display the specific measurement value of the thickness of the motor rotor. The pneumatic electronic digital display micrometer 100 is connected to an external compressed air source, and the inner diameter pneumatic probe 200 and the outer diameter pneumatic measuring device 300 are connected to the pneumatic electronic digital display micrometer 100 through two independent pneumatic pipelines 400. A first pneumatic spray hole 210 is provided on the inner diameter pneumatic probe 200. A tubular measuring hole 310 is opened on the outer diameter pneumatic measuring device 300, and a second pneumatic spray hole 320 is provided on the inner side wall of the tubular measuring hole 310.

[0030] The principle and usage of this embodiment are as follows:

[0031] When measuring the inner diameter of an aircraft engine valve bushing, the axis of the inner diameter pneumatic probe 200 is extended parallel to the inside of the aircraft engine valve bushing, so that the first pneumatic spray hole 210 faces the inner wall of the aircraft engine valve bushing. When measuring the outer diameter of the aircraft engine valve bushing, the axis of the aircraft engine valve bushing is placed parallel to the tubular measuring hole 310, so that the second pneumatic spray hole 320 faces the outer wall of the aircraft engine valve bushing. The pneumatic electronic digital display micrometer 100 is connected to the external compressed air. The compressed air enters the pneumatic electronic digital display micrometer 100 and is first stabilized, and then enters the inner diameter pneumatic probe 200 and the outer diameter pneumatic measuring device 300 through two independent pneumatic pipes, and is sprayed out from the first pneumatic spray hole 210 and the second pneumatic spray hole 320. Different sizes of aircraft engine valve bushings will result in different smoothness of compressed air ejection, which in turn affects the pressure value of the compressed air in the pneumatic electronic digital display micrometer 100. The pneumatic electronic digital display micrometer 100 obtains the inner diameter value and outer diameter value of the aircraft engine valve bushing according to the pressure value.

[0032] As a further solution of this embodiment: the pneumatic electronic digital display micrometer 100 is a dual-channel pneumatic electronic digital display micrometer 100, which is provided with a first channel air outlet 110 and a second channel air outlet 120, which are respectively connected to the inner diameter pneumatic probe 200 and the outer diameter pneumatic measuring device 300.

[0033] As a further solution of this embodiment: the inner diameter pneumatic probe 200 includes a handheld part 220 and a sleeve part 230 which are connected to each other, and the aero-engine valve bushing is sleeved on the sleeve part 230 for measurement. There are two first pneumatic spray holes 210, which are symmetrically arranged on both sides of the sleeve part 230. Air flow channels are arranged in the handheld part 220 and the sleeve part 230 to connect the pneumatic pipeline and the first pneumatic spray hole 210. Furthermore, a first guide groove 240 is arranged on the surface of the sleeve part 230 around the first pneumatic spray hole 210 to accelerate the flow of air from the first pneumatic spray hole 210 to the outside world, so as to avoid air accumulation affecting the accuracy of subsequent measurement results.

[0034] As a further solution of this embodiment: the outer diameter pneumatic measuring device 300 includes a base 330, an outer diameter measuring platform 340 is installed on the base 330, and the tubular measuring hole 310 is opened on the outer diameter measuring platform 340. By replacing the outer diameter measuring platforms 340 of different specifications, the outer diameters of the valve bushings of aircraft engines of different specifications can be measured. Further, the number of the second pneumatic spray holes 320 is two, which are symmetrically arranged on the inner side walls on both sides of the tubular measuring hole 310. The two second pneumatic spray holes 320 correspond to two first joints 350 respectively, and two second joints 360 are arranged on the base 330, which are respectively connected to the two first joints 350 through hoses. An air flow channel is opened inside the base 330, which converges the two second joints 360 and connects to the third joint 370, and the third joint 370 is connected to the pneumatic pipeline 400. Furthermore, two placement grooves 331 are provided on the base 330 for placing two standard parts 332, namely, the upper limit standard part 332 and the lower limit standard part 332. The outer diameters of the two standard parts 332 are measured regularly, so as to reversely correct whether the readings of the pneumatic electronic digital display micrometer 100 are accurate. The outer diameter reading of the measured workpiece is qualified as long as it is between the readings of the two standard parts 332. Furthermore, a second guide groove 380 is provided on the inner surface of the tubular measuring hole 310 around the second pneumatic nozzle 320 to accelerate the flow of air from the second pneumatic nozzle 320 to the outside to avoid air accumulation affecting the accuracy of subsequent measurement results.

[0035] The above only describes in detail the preferred embodiments of the present invention, which is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An aero-engine valve bushing pneumatic and electric measuring instrument, comprising a pneumatic electronic digital display micrometer (100), characterized in that: The invention also comprises an inner diameter pneumatic measuring head (200) and an outer diameter pneumatic measuring device (300); the pneumatic electronic digital display micrometer (100) is connected to an external compressed air source, and the inner diameter pneumatic measuring head (200) and the outer diameter pneumatic measuring device (300) are connected to the pneumatic electronic digital display micrometer (100) via two mutually independent pneumatic pipelines (400); the inner diameter pneumatic measuring head (200) is provided with a first pneumatic spray hole (210); the outer diameter pneumatic measuring device (300) is provided with a tubular measuring hole (310), and a second pneumatic spray hole (320) is provided on the inner side wall of the tubular measuring hole (310).

2. The aero-engine valve bushing gas-electric measuring instrument according to claim 1, characterized in that: The pneumatic electronic digital display micrometer (100) is a dual-channel pneumatic electronic digital display micrometer (100), provided with a first channel air path outlet (110) and a second channel air path outlet (120), which are respectively connected to the inner diameter pneumatic probe (200) and the outer diameter pneumatic measuring device (300).

3. The aero-engine valve bushing gas-electric measuring instrument according to claim 1, characterized in that: The inner diameter pneumatic probe (200) comprises a handheld portion (220) and a sleeve portion (230) which are connected to each other, and an aircraft engine valve bushing is sleeved on the sleeve portion (230) for measurement; the number of the first pneumatic spray holes (210) is two, which are symmetrically arranged on both sides of the sleeve portion (230); and air flow channels are provided in the handheld portion (220) and the sleeve portion (230) to connect the pneumatic pipeline and the first pneumatic spray hole (210).

4. The aircraft engine valve bushing gas and electric measuring instrument according to claim 3, characterized in that: A first guide groove (240) is formed on the surface of the sleeve portion (230) around the first pneumatic spray hole (210).

5. The aircraft engine valve bushing gas and electric measuring instrument according to claim 1, characterized in that: The outer diameter pneumatic measuring device (300) comprises a base (330), an outer diameter measuring platform (340) is mounted on the base (330), and the tubular measuring hole (310) is opened on the outer diameter measuring platform (340).

6. The aero-engine valve bushing gas-electric measuring instrument according to claim 5, characterized in that: The number of the second pneumatic spray holes (320) is two, which are symmetrically arranged on the inner side walls on both sides of the tubular measuring hole (310); the two second pneumatic spray holes (320) correspond to two first connectors (350) respectively, and the base (330) is provided with two second connectors (360), which are respectively connected to the two first connectors (350) through hoses; an air flow channel is opened inside the base (330), which converges the two second connectors (360) and connects to a third connector (370), and the third connector (370) is connected to the pneumatic pipeline (400).

7. The aircraft engine valve bushing gas and electric measuring instrument according to claim 5, characterized in that: The base (330) is provided with two placement grooves (331) for placing two standard parts (332), namely an upper limit standard part (332) and a lower limit standard part (332).

8. The aero-engine valve bushing gas-electric measuring instrument according to claim 6, characterized in that: A second guide groove (380) is formed on the inner surface of the tubular measuring hole (310) around the second pneumatic spray hole (320).

Images