Device for detecting motion angle of operating lever of air bleed valve of engine

Abstract

The invention discloses an engine bleed valve operating lever motion angle detection device which comprises a detection jig and a digital display inclination angle measurement box, a cup-shaped gasket is arranged at the end of a deflector rod, a mounting groove hole is formed in the detection jig, an elastic positioning sleeve is arranged in the mounting groove hole, and the digital display inclination angle measurement box is arranged in the elastic positioning sleeve. Fixing pieces used for fixing the elastic positioning sleeve in the mounting groove hole are arranged on the periphery of the detection jig, the detection jig is attached to the outer circle of the cup-shaped gasket through an inner hole of the elastic positioning sleeve to be mounted on the shifting rod, and the digital display inclination angle measurement box is attracted to the front face of the detection jig through a magnet on a box body of the digital display inclination angle measurement box; the device is wide in application range and high in operability, the motion angle of the operating rod can be measured only by rotating the driving rod and the driven rod, operation is easy and convenient, the measuring tool device is light in design and can be taken down at any time, and the detection device can be used in an assembly site and can also be conveniently used in out-field detection without dismounting an engine outer cover.

Description

Technical Field

[0001] The invention relates to the technical field of aviation engines, in particular to a device for detecting the movement angle of an engine exhaust valve operating lever. Background Art

[0002] Current aircraft engines usually include multiple bleed valves, which can rotate to adjust the opening angle and thus the amount of bleed. The engine bleed valve is opened and closed by a joystick, which includes an active lever group and a driven lever group, both of which are installed in the outer sleeve of the intermediate casing, and the pull rod is a component of the active lever group and the driven lever group. The movement angle of the pull rod is the movement angle of the operating lever, and the active rod and the driven rod drive the bleed valve to move. During the operation of the engine, the opening and closing movements of the bleed valve should be consistent, that is, after the engine is assembled and during random field inspections, it is necessary to measure the movement angles of the active rod and the driven rod, and adjust the length of the connecting rod connected to them to make the angles consistent, thereby ensuring the consistency of the opening and closing movements of the bleed valve. However, in the prior art, the opening and closing movement angles of the operating lever are seldom accurately measured due to the complicated internal structure of the engine and the inability to operate, especially during field inspections, when the engine cover is not removed. There is also no device in the prior art for accurately measuring the movement angles. If the active rod and the driven rod do not move consistently, the engine exhaust valve will be damaged after running for a period of time, and the smoothness of the exhaust valve movement cannot be guaranteed. It can only be adjusted through subsequent maintenance, and the maintenance cost is high. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a device for detecting the movement angle of an engine exhaust valve operating lever to solve the above-mentioned problems.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A device for detecting the movement angle of an engine exhaust valve lever comprises a detection fixture and a digital display inclination angle measuring box, wherein a cup-shaped washer is provided at the end of a lever, a mounting slot is provided on the detection fixture, an elastic positioning sleeve is provided in the mounting slot, fixing parts for fixing the elastic positioning sleeve in the mounting slot are provided around the detection fixture, the detection fixture is mounted on the lever through the inner hole of the elastic positioning sleeve and the outer circle of the cup-shaped washer, and the digital display inclination angle measuring box is adsorbed on the front of the detection fixture through a magnet on its box body.

[0006] In the above invention content, further, the detection fixture is also provided with a limit assembly to prevent the elastic positioning sleeve from falling off from the mounting slot, and the limit assembly includes a limit step arranged on the end of the mounting slot facing the lever, and the aperture of the limit step is 2mm smaller than the aperture of the mounting slot.

[0007] In the above invention content, further, the limit assembly also includes an angular positioning pin arranged on the front side of the detection fixture and a card slot cooperating with the angular positioning pin, one end of the card slot is connected to the mounting slot, the angular positioning pin is composed of an oblong card and a positioning shaft vertically connected to the surface of the oblong card, and one end of the oblong card extends outside the card slot to block the elastic positioning sleeve.

[0008] In the above invention, further, an axial hole passing through the detection fixture is provided in the card slot, and one end of the positioning shaft passes through the axial hole and is placed at the concave arc of the lever.

[0009] In the above invention, further, the fixing member includes threaded holes respectively arranged on the upper, lower and right sides of the detection fixture and set screws threadedly connected through the threaded holes, and the threaded holes are connected to the mounting slots.

[0010] In the above invention, further, a nylon rope is passed through the head of the set screw, and one end of the nylon rope is fixedly connected to the detection fixture.

[0011] In the above invention, further, a horizontally arranged support plate is provided at the bottom of the detection fixture, and the support plate is vertically fixed to the front side of the detection fixture. The digital display inclination measuring box is adsorbed on the support plate through the magnet at the bottom and is against the front side of the detection fixture.

[0012] In the above invention, further, the detection fixture and the support plate are both made of 45 steel.

[0013] The beneficial effects of the present invention are:

[0014] The device obtains the movement angle of the operating rod by measuring the movement angle of the lever, and the detection fixture is connected to the lever through an elastic positioning sleeve and a cup-shaped washer, so that when the lever rotates, the detection fixture and the digital display inclination measuring box adsorbed on the detection fixture move together, and then the movement angle of the lever, that is, the movement angle of the operating rod is measured. If the measurement results of the active rod and the driven rod are inconsistent, the length of one set of connecting rods is adjusted to make the movement angle difference between the active rod and the driven rod within a given tolerance range, so as to keep the opening and closing movements of the exhaust valve consistent. The operation is simple and convenient, and the measuring device is lightweight and can be removed at any time. Secondly, the elastic positioning sleeve has a large size adjustment range, which can meet the large tolerance requirement of the outer diameter of the cup-shaped washer. The device has a wide range of use and strong operability. Thirdly, in addition to being used at the assembly site, the detection device is also convenient for use in field detection without removing the engine cover, saving maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a shifting rod in an active rod and a driven rod connecting rod assembly;

[0016] Figure 2 It is a schematic diagram of the overall structure of the angle detection device of the present invention;

[0017] Figure 3 It is a front axonometric schematic diagram of the angle detection device of the present invention;

[0018] Figure 4 This is a front view of the detection fixture of the present invention;

[0019] Figure 5 for Figure 4 Sectional view of AA in the middle;

[0020] Figure 6 A bearing diagram of the detection fixture of the present invention;

[0021] Figure 7 It is a schematic diagram of the angular positioning pin of the present invention.

[0022] In the figure, 1-detection fixture, 2-elastic positioning sleeve, 3-angular positioning pin, 31-long oval card, 32-positioning shaft, 4-fastening screw, 5-nylon rope, 6-digital display inclination measuring box, 7-mounting slot, 8-card slot, 81-axis hole, 9-shift lever, 91-cup washer, 10-limiting step, 11-support plate, 12-threaded hole. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0024] An engine bleed valve operating lever movement angle detection device comprises a detection fixture 1 and a digital display inclination angle measurement box 6, wherein the operating lever of the aircraft engine bleed valve comprises an active lever and a driven lever, and the bleed valve is opened and closed by rotating the active lever connecting rod group and the driven lever connecting rod group. Figure 1 Schematic diagram of the lever 9 in the active rod connecting rod group and the driven rod connecting rod group, the lever is a component of the active rod connecting rod group and the driven rod connecting rod group, the movement angle of the operating rod can be measured by measuring the movement angle of the lever 9, and then the active rod and the driven rod are adjusted, wherein the movement angle detection device is installed at the end of the lever 9, and the end of the lever 9 is provided with a cup-shaped washer 91, which is convenient for fixing the movement angle detection device;

[0025] Please refer to the attached Figure 2-3 And attached Figure 6As shown, the detection fixture 1 is provided with a mounting slot 7, and the mounting slot 7 passes through the front and rear surfaces of the detection fixture 1. An elastic positioning sleeve 2 is provided in the mounting slot 7. The detection fixture 1 is mounted on the lever 9 through the inner hole of the elastic positioning sleeve 2 and the outer circle of the cup-shaped gasket 91. The size adjustment range of the elastic positioning sleeve 2 is large, which can meet the requirement of large outer diameter tolerance of the cup-shaped gasket. Among them, the detection fixture 1 is provided with fixing parts for fixing the elastic positioning sleeve 2 in the mounting slot 7 around the detection fixture 1. The elastic positioning sleeve 2 can be removed at any time for replacement through the fixing parts. The digital display inclination measuring box 6 is adsorbed on the box body by the magnet on the box body. The front side of the detection jig 1 is the side on which the digital display inclination measuring box 6 is installed. Preferably, a horizontally arranged support plate 11 is provided at the bottom of the detection jig 1, and the support plate 11 is vertically fixed on the front side of the detection jig 1. The digital display inclination measuring box 6 is adsorbed on the support plate 11 through the magnet at the bottom and is backed against the front side of the detection jig 1. The support plate 11 is used as the positioning surface of the digital display inclination measuring box 6. The digital display inclination measuring box 6 and the detection jig 1 are kept in a unified horizontal straight line through the support plate 11, so that the measured value is more accurate, and the detection jig 1 and the support plate 11 are made of 45 steel.

[0026] Because the mounting slot 7 passes through the front and rear surfaces of the detection fixture 1, in order to prevent the elastic positioning sleeve 2 from falling off from the mounting slot 7, the detection fixture 1 is also provided with a limit assembly, and the limit assembly includes a limit step 10 arranged on the end of the mounting slot 7 facing the lever 9. The aperture of the limit step 10 is 2 mm smaller than the aperture of the mounting slot 7, so that the elastic positioning sleeve 2 will not fall off from the side of the mounting slot 7 facing the lever 9, and will not affect the normal connection between the cup washer 91 on the lever 9 and the elastic positioning sleeve 2.

[0027] In the above embodiment, preferably, as shown in the attached Figure 6 and 7 As shown, the limit assembly also includes an angular positioning pin 3 arranged on the front side of the detection fixture 1 and a slot 8 cooperating with the angular positioning pin 3. The angular positioning pin 3 is composed of an oblong card 31 and a positioning shaft 32 vertically connected to the surface of the oblong card 31. One end of the slot 8 is connected to the mounting slot 7, so that after the oblong card 31 is placed in the slot 8, one end of the oblong card 31 can extend outside the slot 8 to block the elastic positioning sleeve 2. A small part of the oblong card 31 that exceeds the front end of the detection fixture 1 blocks the elastic positioning sleeve 2 to prevent it from falling out from the front end. In this way, the elastic positioning sleeve 2 will not fall off from the front end of the mounting slot 7, thereby improving stability. At the same time, because the digital display inclination measurement box 6 is placed on the front side of the detection fixture 1, it also plays a role in pressing the oblong card 31, and there is no need to fix the oblong card 31 separately.

[0028] As attached Figure 4 and 5As shown, the fixing part includes threaded holes 12 respectively arranged on the upper, lower and right sides of the detection fixture 1 and a set screw 4 threadedly connected through the threaded hole 12, and the threaded hole 12 is connected to the mounting slot 7; specifically, during field detection, the engine cover is not removed and the operable space is small. Therefore, threaded holes 12 are designed in three directions of the detection fixture 1 to meet the requirements of different operating directions when measuring the active rod and the driven rod. The set screw 4 is tightened to abut against the elastic positioning sleeve 2 to fix it, so that the detection fixture 1 is fastened to the operating rod connecting rod group, and the synchronous rotation of the operating rod and the detection fixture 1 can be achieved. The movement angle of the operating rod is measured by the digital display inclination measuring box 6 adsorbed on the detection fixture 1. The movement angle of the engine exhaust valve control lever can be measured quickly and accurately through the digital display inclination measuring box 6. The digital display inclination measuring box 6 can measure the angle relatively and absolutely, has its own backlight, and has a large screen display, which is convenient for reading. It can be zeroed at any position and the reading can be locked at any position. As long as the measuring plane does not change during the measurement process, the movement angle of the control lever can be conveniently measured.

[0029] In the above embodiment, preferably, the slot 8 is provided with an axial hole 81 for passing through the fixture, and one end of the positioning shaft 32 passes through the axial hole 81 and is placed at the concave arc of the lever 9. Specifically, when the elastic positioning sleeve 2 is connected to the lever 9, the angular positioning pin 3 is placed so that one end of the positioning shaft 32 passes through the axial hole 81 and is placed at the concave arc of the lever 9. The angular relationship between the detection fixture 1 and the lever 9 is defined by the positioning shaft 32, so that the detection fixture 1 will not rotate relative to each other during the measurement process, thereby ensuring the accuracy of the angle measurement.

[0030] In addition to being used at the assembly site, the angle detection device of the present invention can also be used for random field detection. At this time, the engine cover has been assembled, so no part of the entire device is allowed to fall off. A nylon rope 5 is passed through the head of the set screw 4, and one end of the nylon rope 5 is fixedly connected to the detection fixture 1.

[0031] Specific working process:

[0032] First, place the elastic positioning sleeve 2 in the installation slot 7, and then place the angular positioning pin 3 in the card slot 8, and then fix the detection fixture to the lever 9 through the elastic positioning sleeve 2 and the cup washer 91, and at the same time, place the angular positioning pin 3 at the concave arc of the lever 9, and then tighten the set screw 4 to fasten the detection fixture 1 to the lever 9 in the active rod connecting rod group, and adsorb the digital display inclination angle measurement box 6 on the support plate 11; when measuring, first rotate the lever 9 in the active rod connecting rod group to one of the extreme positions, and then manually adjust the digital display inclination angle measurement box 6 to zero, and then rotate the active rod connecting rod group in the opposite direction to the other extreme position, wherein the reading of the digital display inclination angle measurement box 6 is the movement angle of the active rod;

[0033] The method for measuring the movement angle of the driven rod is consistent with that of the active rod, and the same measuring tool is used. Due to the relative position relationship between the driven rod and the active rod, the entire angle detection device needs to be rotated 180 degrees, and the positioning surface adsorbed by the digital display inclination measuring box 6 is also changed accordingly. The movement angle of the shift rod 9 in the driven rod connecting rod group is detected according to the above method; if the two measurement results are inconsistent, the movement angle difference between the active rod and the driven rod can be adjusted by adjusting the length of one set of connecting rods to be within a given tolerance range.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An engine exhaust valve lever movement angle detection device, characterized in that: The invention comprises a detection jig (1) and a digital display inclination angle measuring box (6); a cup-shaped gasket (91) is provided at the end of a lever (9); a mounting slot (7) is provided on the detection jig (1); an elastic positioning sleeve (2) is provided in the mounting slot (7); fixing parts for fixing the elastic positioning sleeve (2) in the mounting slot (7) are provided around the detection jig (1); the detection jig (1) is mounted on the lever (9) by fitting the inner hole of the elastic positioning sleeve (2) with the outer circle of the cup-shaped gasket (91); and the digital display inclination angle measuring box (6) is adsorbed on the front of the detection jig (1) by a magnet on its box body.

2. The engine exhaust valve lever movement angle detection device according to claim 1, characterized in that: The detection fixture (1) is also provided with a limit assembly for preventing the elastic positioning sleeve (2) from falling off from the mounting slot hole (7), and the limit assembly includes a limit step (10) arranged on the end of the mounting slot hole (7) facing the lever (9), and the aperture of the limit step (10) is 2 mm smaller than the aperture of the mounting slot hole (7).

3. The engine exhaust valve lever movement angle detection device according to claim 2, characterized in that: The limit assembly also includes an angular positioning pin (3) arranged on the front side of the detection fixture (1) and a slot (8) cooperating with the angular positioning pin (3); one end of the slot (8) is connected to the mounting slot (7); the angular positioning pin (3) is composed of an oblong card (31) and a positioning shaft (32) vertically connected to the surface of the oblong card (31); one end of the oblong card (31) extends outside the slot (8) to block the elastic positioning sleeve (2).

4. The engine exhaust valve lever movement angle detection device according to claim 3, characterized in that: An axial hole (81) passing through the detection fixture (1) is provided in the clamping slot (8), and one end of the positioning shaft (32) passes through the axial hole (81) and is placed at the concave arc of the shifting rod (9).

5. The engine exhaust valve lever movement angle detection device according to claim 1, characterized in that: The fixing member comprises threaded holes (12) respectively arranged on the upper, lower and right sides of the detection fixture (1) and set screws (4) threadedly connected through the threaded holes (12), and the threaded holes (12) are connected to the installation slot holes (7).

6. The engine exhaust valve lever movement angle detection device according to claim 5, characterized in that: A nylon rope (5) is passed through the head of the set screw (4), and one end of the nylon rope (5) is fixedly connected to the detection fixture (1).

7. The engine exhaust valve lever movement angle detection device according to claim 1, characterized in that: A horizontally arranged support plate (11) is provided at the bottom of the detection jig (1), and the support plate (11) is vertically fixed on the front side of the detection jig (1). The digital display inclination angle measuring box (6) is adsorbed on the support plate (11) via a magnet at the bottom and is against the front side of the detection jig (1).

8. The engine exhaust valve lever movement angle detection device according to claim 1, characterized in that: The detection fixture (1) and the support plate (11) are both made of 45 steel.

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