CN214539990U - Electrostatic sensor calibration device for online monitoring of air circuit of aircraft engine - Google Patents

Abstract

The invention discloses an electrostatic sensor calibration device for online monitoring of an aircraft engine gas circuit, which is characterized in that: the device consists of an oil drop titration device, a vacuum barrel cover, an equivalent capacitance module, an equivalent capacitor positioning mechanism, an annular electrostatic sensor, a first fixed positioning module, a needle-shaped electrostatic sensor, a second fixed positioning module, a Faraday barrel module, a vacuum barrel, a fixed bracket module, an electrostatic sensor data terminal, a direct current power supply and a vacuum pump module; the static sensor of the calibration device is calibrated for multiple times; the relative positions of the needle-shaped electrostatic sensor, the annular electrostatic sensor and an oil drop dropping track and the charge quantity of oil drops are changed, signals collected by the needle-shaped electrostatic sensor, the annular electrostatic sensor and the Faraday barrel form a test control group, and the reliability, the sensitivity, the accuracy and the like of oil drop electrostatic signals obtained by the needle-shaped electrostatic sensor and the annular electrostatic sensor are further researched respectively; meanwhile, data support is provided for researching the influence of the oil drop track deviating from the central axis of the electrostatic sensor probe on the acquired signal.

Description

Electrostatic sensor calibration device for online monitoring of air circuit of aircraft engine

Technical Field

The utility model belongs to the technical field of electrostatic sensor marks, a aeroengine gas circuit on-line monitoring's electrostatic sensor calibration device is related to.

Background

The gas circuit system of the aircraft engine is in service for a long time under the conditions of high temperature, high pressure, high rotating speed, alternating load and the like, so that the key parts such as the blades and the like are easy to generate faults, and therefore, the gas circuit and the key parts of the aircraft engine are subjected to online monitoring and fault diagnosis, and the gas circuit system has strong application background and technical requirements for improving the safety guarantee capability of the engine during service operation. The electrostatic sensor is used as a core component for online monitoring of static electricity of an aircraft engine gas path, is a basic link for acquiring parameter changes of health states and faults of the aircraft engine gas path, and the accuracy, reliability, high precision, multi-scale spatial sensitivity and other performances of the electrostatic sensor directly affect the accurate grasp of the working state of a monitoring component.

At present, most of the calibration devices and methods for electrostatic sensors use oil drops and solid particles as media for calibration. The electrostatic sensor calibration device is designed by using solid particles as a medium, the structure is simple, the operation is convenient, but the charge quantity of the particles has discontinuous characteristics, and the speed, the concentration and the like of the particles are difficult to accurately control. Patent CN102608840A discloses a static sensor test device and a method for measuring the frictional electrification amount of particles, which solves the calibration problem that the frictional charge and the contact charge in the same medium may cause the variation of charged abrasive particles, but the calibration device has the disadvantages that one of the charged generation sources is only a form of frictional electrification, and cannot simulate a complicated environment and a large charged amount, and the charged amount and the speed of charged particles are not easy to be accurately controlled; secondly, the offset distance between the falling track of the electric particles and the central axis of the sensor probe cannot be adjusted, so that the performances of spatial multi-scale sensitivity, accuracy, reliability and the like of the sensor cannot be researched, and the third device has a complex mechanism and poor operation reliability; the electrostatic sensor calibration device is designed by using oil as a medium, the electric charge quantity can be accurately controlled, the precision of the calibration result is greatly improved, and the structure of the device is relatively complex. The patent CN104215557B discloses a calibration device for electrostatic sensors, which solves the problems of the polarity of the charge amount generated by oil drops, the relative position between the oil drop trajectory and the sensor probe, but one of the disadvantages of the calibration device is easily affected by factors such as the temperature and humidity of the experimental environment, and the charge amount generated by oil drops may be eliminated during the dropping process; the relative distance between the two oil drop tracks and the sensor probe is measured by a caliper, and the caliper is time-consuming and labor-consuming in measurement and has measurement errors, so that a calibration result may have larger errors; thirdly, the device can not solve the problem that the electrostatic sensor moves at the vertical height and the horizontal position away from oil drops, and can not research the sensitivity of the spatial scale; and fourthly, lubricating oil is adopted as a calibration medium, oil drops are easily damaged by a high-voltage reason structure, and in addition, the device is lack of an electrostatic sensor contrast group, so that the accuracy of the calibration result of the electrostatic sensor cannot be contrasted and verified.

In summary, in the existing calibration device for the electrostatic sensor, the relative distance from the central axis of the probe of the electrostatic sensor to the track of the charged oil drops, the size and frequency of the oil drops, the accurate control of the amount of electric charge of the oil drops, the interference of the test environment and other factors still seriously affect the charge signal collected by the electrostatic sensor, so that the calibration device for the electrostatic sensor has larger error. Therefore, finding an electrostatic sensor calibration device with high reliability, accurate control, high precision and multi-scale spatial sensitivity is one of the key problems for realizing the effective online monitoring of the air circuit of the aircraft engine.

SUMMERY OF THE UTILITY MODEL

The utility model aims at carrying out calibration many times through the electrostatic sensor to calibration device, change needle-like electrostatic sensor, cyclic annular electrostatic sensor and the relative position of oil droplet drippage orbit and the electric charge volume size of oil droplet, the signal formation test contrast group that needle-like electrostatic sensor and cyclic annular electrostatic sensor and faraday bucket gathered, and then study reliability, sensitivity, accuracy etc. that needle-like and cyclic annular electrostatic sensor obtain oil droplet electrostatic signal respectively; meanwhile, data support is provided for researching the influence of the oil drop track deviating from the central axis of the electrostatic sensor probe on the acquired signal.

The utility model provides an aeroengine gas circuit on-line monitoring's electrostatic transducer calibration device, its characterized in that: the device comprises an oil drop titration device 1, a vacuum barrel cover 2, an equivalent capacitance module 3, an equivalent capacitor positioning mechanism module 4, an annular electrostatic sensor 5, a first fixed positioning module 6, a needle-shaped electrostatic sensor 7, a second fixed positioning module 8, a Faraday barrel module 9, a vacuum barrel 10, a fixed support module 11, an electrostatic sensor data terminal 12, a direct current power supply 13 and a vacuum pump module 14; the oil drop titration device 1 consists of a bracket 18, a transfusion bottle 19, an oil pipeline 20, a control switch 21 and a burette 22; the bracket 18 is fixedly arranged right above the vacuum barrel cover 2; the hanging bottle 19 is hung upside down on the bracket 18, and the bottle mouth is connected with one end of the burette 22 through an oil pipeline 20; the oil delivery pipe 20 is provided with a control switch 21; the equivalent capacitance module 3 consists of a burette 22, an insulating tube 23 and a conductive tube 24; the insulating tube 23 is connected with the inner side of the conductive tube 24 in an interference fit manner; the burette 22 is connected with the insulating tube 23 side in an interference fit manner, and a lead is respectively led out from the upper end part of the burette 22 and the outer side surface of the conductive tube 24 and is connected with the anode and the cathode of the adjustable direct current power supply 13; the equivalent capacitor positioning mechanism module 4 consists of a vertical rod 25, a vertical sliding block 26 and a cylindrical force arm 28; one end of the cylindrical force arm 28 is movably sleeved with the vertical sliding block 26, and the other end of the cylindrical force arm is fixedly connected with the middle position of the outer side of the conductive tube 24; the first fixing and positioning module 6 consists of a vertical rod 25, a vertical sliding block 26, a first bolt 27, a supporting force arm 31, a fixing clamping seat 29, a fixing platform 30, a horizontal sliding block 32 and a second bolt 33; the vertical sliding block 26 is fixed in a clamping groove on the vertical rod 25 through a first bolt 27, and the vertical sliding block 26 is fixedly connected with a supporting force arm 31; the horizontal sliding block 32 is movably sleeved on the supporting force arm 31; the fixed clamping seat 29 is fixedly connected to the horizontal sliding block 32; the annular electrostatic sensor 5 is horizontally fixed on the fixed clamping seat 29; the second fixed positioning module 8 has the same structure as the first fixed positioning module 6, and is characterized in that the second fixed positioning module 8 further comprises a horizontal rotating mechanism 15, the horizontal rotating mechanism 15 is composed of a dial 34, a sector 35 and a clamping sleeve 36, and the clamping sleeve 36 is fixedly connected to the axis of the inner side of the diameter of the dial 34; the lower end surface of the dial plate 34 is fixedly connected to the upper surface of the horizontal sliding block 32; the central shaft end of the sector 35 is clamped with the clamping sleeve 36, and the sector 35 is rotated by taking the clamping sleeve 36 as a central shaft; the fixed platform 30 is arranged on the upper surface of the sector 35; the needle-shaped electrostatic sensor 7 is mounted on a fixed platform 30 through a fixed clamping seat 29; the Faraday barrel module 9 consists of a Faraday barrel 37 and a voltmeter 39; the Faraday barrel 37 is fixedly arranged at the central position of the bottom surface of the vacuum barrel 10; the voltmeter 39 is connected with a signal line of the Faraday barrel 37 through a corresponding hole on the vacuum barrel cover 2; the annular electrostatic sensor 5 and the needle-shaped electrostatic sensor 7 are respectively connected with an electrostatic sensor data terminal 12 through signal lines; the vacuum barrel cover 2 is arranged above the vacuum barrel 10 and is connected with the vacuum barrel 10 in a sealing mode.

The utility model discloses further set up to: the insulating tube 23 is made of polysulfide rubber; the burette 22 and the conductive tube 24 are made of magnesium-aluminum-silicon alloy materials; the horizontal rotating mechanism 15, the vertical adjusting mechanism 16, the horizontal adjusting mechanism 17, the vertical rod 25, the first bolt 27, the cylindrical force arm 28, the second bolt 33 and the annular base 38 are all made of anti-static ABS composite materials.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the adjusting horizontal rotating mechanism and the adjusting horizontal and vertical rod adjusting mechanisms provide data support for researching the influence of oil drop tracks deviating from the central axis of the needle-shaped electrostatic sensor probe on signals acquired by the electrostatic sensor, the adjusting horizontal and vertical rod adjusting mechanisms provide data support for researching the influence of oil drop tracks deviating from the central axis of the annular probe on signals acquired by the annular electrostatic sensor, and the performances of sensitivity, accuracy, reliability and the like of the spatial scale of the annular and needle-shaped electrostatic sensors are researched through the difference of oil drop signals acquired by the needle-shaped and annular electrostatic sensors and the Faraday barrel during calibration;

2. the calibration device method utilizes the vacuum barrel to eliminate the influence of external environment interference factors on calibration parameters; according to the requirement of the calibration device, an equivalent capacitor is designed, and a wide range voltage (the voltage range is 0-500V) can be applied. The calibration oil medium adopts aviation kerosene, and firstly, the problem that the speed, the charge quantity, the dripping track and the like are difficult to control accurately when solid particles are adopted for calibration at present is solved; secondly, errors caused by the fact that the structure of oil particles is damaged due to overhigh voltage when the lubricating oil is used for calibration at present are eliminated (the calibrated lubricating oil is damaged when the voltage reaches 378V); meanwhile, the burette device module can provide oil liquid in a controllable continuous and discontinuous state;

3. the calibration device can monitor the charged oil drops with weak charge, the collected static signal has the characteristics of high resolution, high stability, high signal-to-noise ratio and the like, and the calibration model is suitable for the severe environment with high temperature, high pressure and high noise; in addition, the technology for monitoring the charge signal level change in the air passage of the aircraft engine by adopting the calibration method has the advantages of small difficulty, low cost and strong pertinence, so that the health condition of the air passage of the aircraft engine is monitored by adopting the calibrated over-ground electrostatic sensor, the cost can be reduced, the technical difficulty can be reduced, the monitoring effect can be improved, and the monitoring purpose can be realized on line with high efficiency and high quality.

Drawings

Fig. 1 is a schematic view of the overall structure in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an equivalent capacitor in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an equivalent capacitor positioning mechanism module in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fixing and positioning module of an annular electrostatic sensor according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a needle-shaped electrostatic sensor fixing and positioning module according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a portion of a vertical adjustment mechanism in an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a horizontal adjustment mechanism in an embodiment of the present invention;

fig. 8 is a schematic structural view of a horizontal rotation mechanism in an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a fixing bracket module according to an embodiment of the present invention.

In the figure: 1. an oil drop titration device module; 2. a vacuum barrel cover; 3. an equivalent capacitor module; 4. an equivalent capacitor positioning mechanism module; 5. an annular electrostatic sensor; 6. a first fixed positioning module; 7. a needle-shaped electrostatic sensor; 8. a second fixed positioning module; 9. a Faraday barrel module; 10. a vacuum drum; 11. a fixed support module; 12. an electrostatic sensor data terminal; 13. A direct current power supply; 14. a vacuum pump module; 15. a horizontal rotation mechanism; 16. a vertical adjustment mechanism; 17. a horizontal adjustment mechanism; 18. a support; 19. hanging a bottle; 20. an oil delivery pipe; 21. a control switch; 22. a burette; 23. an insulating tube; 24. a conductive tube; 25. a vertical rod; 26. a vertical slide block; 27. a first latch; 28. a cylindrical force arm; 29. fixing the card holder; 30. a fixed platform; 31. supporting the force arm; 32. a horizontal slider; 33. a second bolt; 34. a dial scale; 35. a sector; 36. a card sleeve; 37. a Faraday barrel; 38. an annular base; 39. a voltmeter; 40. an alternating current power supply; 41. a vacuum pump; 42. and an air exhaust pipe.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings 1 to 9 and the embodiments.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

It is to be understood that the terms "length," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Example (b): an electrostatic sensor calibration device for online monitoring of an aircraft engine gas circuit is shown in fig. 1-5. The calibration device comprises an oil drop titration device module 1, a vacuum barrel cover 2, an equivalent capacitor module 3, an equivalent capacitor positioning mechanism module 4, a first fixed positioning module 6, a second fixed positioning module 8, a Faraday barrel module 9 and a vacuum barrel 10 which are sequentially arranged from top to bottom. The device comprises a horizontal rotating mechanism 15, a vertical adjusting mechanism 16 and a horizontal adjusting mechanism 17 which support the needle-shaped and annular electrostatic sensors for fixed positioning; the annular electrostatic sensor 5, the needle-shaped electrostatic sensor 7, the electrostatic sensor data terminal 12, the direct current power supply 13, the vacuum pump module 14, the voltmeter 39 and the alternating current power supply 40 are further included. Wherein, the annular electrostatic sensor 5 and the needle-shaped electrostatic sensor 7 form an experimental control group.

As shown in fig. 1, the oil drop titration apparatus module 1 includes a support 18, a hanging bottle 19, an oil pipe 20, a control switch 21, and a burette 22. The support 18 is located the position directly over the vacuum bung, and the top of defeated oil pipe 20 links to each other with transfusion bottle 19, and the lower extreme of defeated oil pipe 20 communicates with the upper end of buret 22, and control switch 21 cup joints on defeated oil pipe 19. The frequency of the drop injection into the burette 22 is controlled by adjusting the switch 21.

In this embodiment, the hanging bottle 19 is filled with international 3 aviation kerosene, which aims to make aviation kerosene not easily affected by high voltage, keep its physical and chemical properties stable within 520V range, and eliminate the disadvantage of coking of oil drops caused by high voltage when the present calibration adopts lubricating oil. The control switch 21 adjusts the size and injection frequency of oil drops in the oil delivery pipe 20 to ensure that the electric charge of the oil drops is the same during calibration.

The lower end part of the burette 22 is a blunt body, the diameter of the hole at the lowest end part of the blunt body is 2mm, and the inner diameter of the pipe at the upper end part is 4mm, so that the design is that the oil liquid has a buffering process when being injected into the burette, and the oil liquid drops fully obtain the charged quantity.

As shown in fig. 1 and fig. 2, the equivalent capacitor module 3 includes an adjustable dc power supply 13, a burette 22, an insulating tube 23, a conductive tube 24, and a conductive wire. The burette 22 is an inner ring of the equivalent capacitor module 3, the insulating tube 23 is sleeved with the outer wall of the burette 22 in an interference fit manner, and the conductive tube 24 is sleeved with the outer wall of the insulating tube 23 in an interference fit manner. The burette 22 and the conductive tube 24 are respectively connected with two poles of the direct current power supply through leads of the adjustable direct current power supply 13.

In this embodiment, two capacitor poles of the equivalent capacitor module 3 are isolated by the insulating tube 23 and cannot be conducted, so that positive and negative charges are respectively accumulated on the inner ring burette 22 and the outer ring conductive tube 24 of the equivalent capacitor module 3, when oil drops flow down along the oil pipeline 20, the charges accumulated on the metal burette 22 are transferred to the oil drops when the oil drops pass through the inner side of the metal burette 22, so that the oil drops are charged, the problem of the charge of the oil drops is effectively solved, and in addition, the voltage of two electrode plates of the equivalent capacitor is controllable and the adjusting range is 0-500V through calculation and analysis.

The burette 22 and the conductive tube 24 are made of magnesium-aluminum-silicon alloy materials because of their good conductivity, low cost, and good chemical and physical properties (except conductivity) in harsh environments. Polysulfide rubber is used for the insulating tube 23 because the dielectric constant of the energy accumulating rubber is larger than that of a commonly used material in order to improve the capacitance of the equivalent capacitor.

As shown in fig. 1 and 3, the equivalent capacitor positioning module 4 includes a conductive tube 24, a vertical rod 25, a vertical slider 26, a first pin 27, and a cylindrical arm 28. The vertical sliding block 26 is movably sleeved on the vertical rod 25, and the first bolt 27 fixes the relative height of the vertical sliding block 26 on the vertical rod 25; the vertical sliding block 26 is fixedly connected with one end of a cylindrical force arm 28, and the other end of the cylindrical force arm 28 is fixedly connected with the middle position of the outer side of the conductive tube 24.

In this embodiment, two cylindrical arms 28 fix the conductive tube 23 and limit the shaking of the burette 22 during titration.

The positioning of the equivalent capacitor module 3 in the vertical direction is achieved by adjusting the groove on the vertical rod 25, the hole on the vertical slider 26 and the first pin 27.

As shown in fig. 1 and fig. 4 to 7, the first fixed positioning module 6 includes a vertical adjusting mechanism 16, a horizontal adjusting mechanism 17, a fixed clamping seat 29 and a fixed platform 30. The vertical adjusting mechanism 16 includes a vertical rod 25, a vertical slider 26, a first bolt 27 and a support arm 31. The vertical sliding block 26 is connected to the groove of the vertical rod 25 through a clamping groove on the vertical rod 25 and a first bolt 27. The horizontal adjusting mechanism 17 comprises a supporting force arm 31, a horizontal sliding block 32 and a second bolt 33, the supporting force arm 31 is fixed on the vertical sliding block 26 through the second bolt 33, the horizontal sliding block 32 is sleeved on the supporting force arm 31, the lower end of the fixed clamping seat 29 is fixedly connected to the upper surface of the horizontal sliding block 32, the fixed clamping seat 29 is arranged on the fixed platform 30, the upper end face of the fixed platform 30 is attached to the lower end face of the fixed clamping seat 29, and the annular electrostatic sensor 5 is installed on the fixed platform 30 through the fixed clamping seat 29.

In this embodiment, vertical rod 25 middle part sets up the recess side by side, and the interval of adjacent recess is 5mm, convenient accurate reading when adjusting vertical slider 26 to reduce experimental error.

The supporting arm 31 is a polygonal rod body, and the edge of the polygonal rod body along the length direction of the polygonal rod body is chamfered. The horizontal slider 32 can be restricted by the polygonal rod body to only do translational motion, and the chamfering is convenient to move.

The side wall surface of the supporting force arm 31 is provided with 150 mm-long scale marks along the length direction, and the adjacent distance of the scales is 1 mm. Meanwhile, a rectangular through hole is formed in the middle of one side of the horizontal sliding block 32, and a red oil-coated line is arranged in the middle of the rectangular through hole, so that the horizontal sliding block 32 can accurately read when the supporting force arm 31 moves, and measuring errors are reduced.

The scales are used for accurately and conveniently measuring the distance between the motion track of the charged oil drops and the vertical direction of the annular electrostatic transmission, and the horizontal adjusting mechanism 17 is used for controlling the distance between the oil drops and the sensor probe in the horizontal direction.

As shown in fig. 1 and fig. 5 to 8, the second fixing and positioning module 8 includes a horizontal rotation mechanism 15, a vertical adjustment mechanism 16, a horizontal adjustment mechanism 17, a fixing clamping seat 29 and a fixing platform 30, and the connection modes of the vertical adjustment mechanism 16 and the horizontal adjustment mechanism 17 are respectively the same as the above embodiment. The horizontal rotating mechanism 15 is composed of a dial 34, a sector 35 and a clamping sleeve 36. The cutting sleeve 36 is fixedly connected to the inner diameter axis of the dial 34, the lower end face of the dial 34 is fixedly connected to the upper surface of the horizontal slider 32, the fixed platform 30 is installed on the upper surface of the sector 35, the central axial end of the sector 35 is clamped with the cutting sleeve 36, the sector 35 is rotated by taking the cutting sleeve 36 as a central axis, the upper end face of the fixed platform 30 is connected with the fixed clamping seat 29 in the same manner as in the previous embodiment, and the needle-shaped electrostatic sensor 7 is installed on the fixed platform 30 through the fixed clamping seat 29.

In the present embodiment, the curved surface side of the dial plate 34 is provided with scale lines, the adjacent scale thereof is 1 °, the total scale is set to 180 °, even if the error control is within the range of 1 mm.

A striking scale mark is arranged at the right middle position of the curved surface side of the sector 35, and a cylinder with the same diameter as the clamping sleeve 36 is arranged at the central axis side, so that the sector 35 is ensured to rotate around the same position in the dial 34. The rotating sector 35 further drives the needle electrostatic sensor 7 to rotate in the horizontal plane, i.e. changes the relative position of the needle probe along the left and right direction of the supporting force arm 31.

The central angle of the clamping port of the clamping sleeve 36 is 120 degrees, so that the sector 35 rotates in the dial by a large angle.

The scales are used for accurately reading the rotation angle of the needle-shaped electrostatic sensor 7 and conveniently measuring the distance of the motion track of the charged oil drops deviating from the probe of the needle-shaped electrostatic sensor in the horizontal plane.

As shown in fig. 1 and 9, the fixed frame module 11 includes vertical rods 25 and bases 38, the fixed frame module 11 is disposed in the vacuum bucket, the four vertical rods 25 are fixedly connected to the two annular bases 38, and two end faces of the vertical rod 26 and the outer end face of the base 38 are disposed on the same horizontal plane and are mounted and fixed.

In the present embodiment, the range of the groove of the vertical adjusting mechanism 16 on the vertical rod 25 is 0-600 mm. The relative height of the lower end surface of the burette 22 and the needle and ring electrostatic sensor probes is in the range of 0-500mm in order to obtain different velocities of the charged oil droplets as they pass in the vicinity of the ring electrostatic sensor and the needle electrostatic sensor 7.

The vertical slider 26 supporting the equivalent capacitor positioning mechanism module 4, the first fixed positioning module 6 and the second fixed positioning module 8 is mounted on the vertical rod 25, and the capacitor and the electrostatic sensor are restrained and positioned in the vertical direction by the fixed support module 11.

As shown in fig. 1, the vacuum barrel cover 2 is disposed over the vacuum barrel 10, and the vacuum barrel cover 2 is provided with holes corresponding to the wires, the oil pipe 20, and the signal lines of the display terminal and capable of being connected in an airtight manner. The vacuum pump module 14 includes an ac power supply 40, a vacuum pump 41, and an exhaust tube 42. The bottom side of the vacuum tank 10 is connected to a vacuum pump 41 through an exhaust tube 42, and the vacuum pump 41 is connected to an ac power source 40.

In this embodiment, the vacuum barrel cover 2 is detachably and hermetically connected with the vacuum barrel 10 and is made of antistatic transparent glass, and the vacuum pump 41 is connected with the vacuum barrel 10 through a hole on the bottom side of the vacuum barrel 10 and an antistatic exhaust tube 42. After the calibration device is adjusted during calibration, the calibration device is in a sealed environment, the vacuum pump 41 is started, and the interior of the vacuum barrel 10 is pumped to a vacuum state, so that the external factors are prevented from interfering with the acquisition of signals. The accuracy of the electrostatic sensor calibration device is further enhanced. The vacuum barrel is a transparent glass barrel, so that scale values on the dial plate 31 and the supporting force arm 34 can be observed conveniently.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (7)

1. The utility model provides an aeroengine gas circuit on-line monitoring's electrostatic transducer calibration device which characterized in that: the device comprises an oil drop titration device (1), a vacuum barrel cover (2), an equivalent capacitance module (3), an equivalent capacitor positioning mechanism module (4), an annular electrostatic sensor (5), a first fixed positioning module (6), a needle-shaped electrostatic sensor (7), a second fixed positioning module (8), a Faraday barrel module (9), a vacuum barrel (10), a fixed support module (11), an electrostatic sensor data terminal (12), a direct-current power supply (13) and a vacuum pump module (14); the oil drop titration device (1) is composed of a support (18), a transfusion bottle (19), an oil delivery pipe (20), a control switch (21) and a titration pipe (22), wherein the support (18) is fixedly arranged right above the vacuum barrel cover (2), the transfusion bottle (19) is hung upside down on the support (18), the bottle opening of the transfusion bottle (19) is connected with one end of the titration pipe (22) through the oil delivery pipe (20), and the control switch (21) is arranged on the oil delivery pipe (20); the equivalent capacitor module (3) is composed of a burette (22), an insulating tube (23) and a conductive tube (24), the insulating tube (23) is connected with the inner side of the conductive tube (24) in an interference fit manner, the burette (22) is connected with the insulating tube (23) in an interference fit manner, and a lead is respectively led out from the upper end part of the burette (22) and the outer side surface of the conductive tube (24) and is connected with the anode and the cathode of the adjustable direct current power supply (13); the equivalent capacitor positioning mechanism module (4) consists of a vertical rod (25), a vertical sliding block (26) and a cylindrical force arm (28), wherein one end of the cylindrical force arm (28) is movably sleeved with the vertical sliding block (26), and the other end of the cylindrical force arm is fixedly connected with the middle position of the outer side of the conductive tube (24); the first fixing and positioning module (6) consists of a vertical rod (25), a vertical sliding block (26), a first bolt (27), a supporting force arm (31), a fixing clamping seat (29), a fixing platform (30), a horizontal sliding block (32) and a second bolt (33); the vertical sliding block (26) is fixed in a clamping groove on the vertical rod (25) through a first bolt (27), and the vertical sliding block (26) is fixedly connected with a supporting force arm (31); the horizontal sliding block (32) is movably sleeved on the supporting force arm (31); the fixed clamping seat (29) is fixedly connected to the horizontal sliding block (32); the annular electrostatic sensor (5) is horizontally fixed on the fixed clamping seat (29); the second fixed positioning module (8) has the same structure as the first fixed positioning module (6), and is characterized in that the second fixed positioning module (8) further comprises a horizontal rotating mechanism (15), the horizontal rotating mechanism (15) consists of a dial (34), a sector (35) and a clamping sleeve (36), and the clamping sleeve (36) is fixedly connected to the axis of the inner side of the diameter of the dial (34); the lower end surface of the dial (34) is fixedly connected to the upper surface of the horizontal sliding block (32); the central shaft end of the sector (35) is clamped with the clamping sleeve (36), and the sector (35) is rotated by taking the clamping sleeve (36) as a central shaft; the fixed platform (30) is arranged on the upper surface of the sector (35); the needle-shaped electrostatic sensor (7) is arranged on a fixed platform (30) through a fixed clamping seat (29); the Faraday barrel module (9) consists of a Faraday barrel (37) and a voltmeter (39); the Faraday barrel (37) is fixedly arranged at the central position of the bottom surface of the vacuum barrel (10); the voltmeter (39) is connected with a signal wire of the Faraday barrel (37) through a corresponding hole on the vacuum barrel cover (2); the annular electrostatic sensor (5) and the needle-shaped electrostatic sensor (7) are respectively connected with an electrostatic sensor data terminal (12) through signal lines; the vacuum barrel cover (2) is arranged above the vacuum barrel (10) and is connected with the vacuum barrel (10) in a sealing mode.

2. The calibration device for the electrostatic sensor for the online monitoring of the air passage of the aircraft engine as claimed in claim 1, wherein the lower end of the burette (22) is a blunt body, the diameter of the hole at the lowest end of the blunt body is 2mm, and the inner diameter of the pipe at the upper end is 4 mm.

3. The device for calibrating the electrostatic sensor for the online monitoring of the gas circuit of the aircraft engine as claimed in claim 1, wherein the liquid injected into the hanging bottle (19) is national standard 3 aviation kerosene.

4. The calibration device for the electrostatic sensor for the online monitoring of the air circuit of the aircraft engine is characterized in that the burette (22) and the conductive tube (24) are both made of magnesium-aluminum-silicon alloy materials, and the insulating tube (23) is made of polysulfide rubber.

5. The device for calibrating the electrostatic sensor for the online monitoring of the air passage of the aircraft engine as claimed in claim 1, wherein the vertical rod (25) is provided with parallel grooves at the middle part, the supporting force arm (31) is a polygonal rod body, the edge of the polygonal rod body in the length direction is arranged in a chamfer manner, the side wall surface of the supporting force arm (31) is provided with scales in the length direction, and the adjacent distance between the scales is 1 mm; a rectangular through hole is formed in the middle of one side of the horizontal sliding block (32), and scale marks are formed in the middle of the rectangular through hole.

6. The device for calibrating the electrostatic sensor for the online monitoring of the air circuit of the aircraft engine as claimed in claim 1, wherein: the curved surface side of calibrated scale (34) is equipped with the scale mark, and its adjacent scale is 1, and total scale sets up to 180, the positive intermediate position of quadrant (35) curved surface side has a striking scale mark, the center pin line side have be equipped with the cylinder in cutting ferrule (36) with the footpath, quadrant (35) rotate around same position in calibrated scale (34), quadrant (35) rotate and then drive needle-like electrostatic sensor (7) at the horizontal plane internal rotation, the joint port central angle degree of cutting ferrule (36) is 120.

7. The device for calibrating the electrostatic sensor for the online monitoring of the air passage of the aircraft engine as claimed in claim 1, wherein the vacuum barrel cover (2) and the vacuum barrel (10) are both made of antistatic transparent glass, and the vacuum barrel cover and the vacuum barrel are detachably and hermetically connected.

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