Aviation piston engine crankshaft coaxiality detection device

Abstract

The utility model relates to the technical field of aircrafts, in particular to an aviation piston engine crankshaft coaxiality detection device which comprises a base, a locking positioning support, a plug gauge positioning plate, a plug gauge positioning column and a coaxiality plug gauge are arranged on the base, and the plug gauge positioning plate is arranged between the coaxiality plug gauge and the locking positioning support. One end of the coaxiality plug gauge is movably arranged on the plug gauge positioning column in a sleeving mode, a U-shaped groove is formed in the coaxiality plug gauge, and the axial center line of the U-shaped groove and the axial center line of the locking positioning support are consistent in direction and are located on the vertical section, in the axial direction, of the locking positioning support. According to the utility model, through the arrangement of the coaxiality plug gauges, the U-shaped groove and the position of the locking positioning support, the coaxiality of the crankshaft can be detected only by rotating the crankshaft, through the arrangement of the positioning groove on the positioning support, the positioning accuracy of the reference axis of the crankshaft can be improved, and through the arrangement of the two groups of coaxiality plug gauges, the coaxiality of the crankshaft can be detected. Coaxiality plug gauges with different U-shaped groove widths can be rapidly replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft, in particular to a crankshaft coaxiality detection device for an aviation piston engine. Background Art

[0002] The sealing section of an aviation piston engine is very prone to wear and corrosion during the use of the engine, resulting in oil leakage that seriously affects flight safety. At this time, the crankshaft needs to be deeply repaired through material addition and subtraction technology to restore its airworthiness. After deep repair, the coaxiality of the repaired crankshaft sealing section relative to the crankshaft main journal needs to meet certain conditions to meet the standards. Therefore, after repair, a certain method is needed to determine whether the coaxiality meets the standards. In the prior art, crankshaft coaxiality detection mainly uses a three-coordinate measuring instrument for coaxiality acquisition, but the three-coordinate measuring instrument is expensive, has a slow detection speed, and is inconvenient to operate, and cannot meet the requirements of existing crankshaft coaxiality detection. Utility Model Content

[0003] In order to overcome the technical problems of slow coaxiality detection speed, high detection cost and inconvenient operation in the prior art, the utility model provides a coaxiality detection device for a crankshaft of an aviation piston engine.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a coaxiality detection device for the crankshaft of an aviation piston engine, comprising a base, on which a locking and positioning bracket, a plug positioning plate, a plug positioning column and a coaxiality plug gauge are provided, the plug positioning plate is arranged between the coaxiality plug gauge and the locking and positioning bracket, one end of the coaxiality plug gauge is movably sleeved on the plug positioning column, the coaxiality plug gauge is provided with a U-shaped groove, the axial center line of the U-shaped groove is consistent with the axial center line direction of the locking and positioning bracket and is on the vertical section of the locking and positioning bracket along the axial direction.

[0005] Preferably, the locking positioning bracket includes a bracket seat and a bracket pressure plate, the bracket seat is provided with a positioning groove, one end of the bracket pressure plate is hinged to one end of the bracket seat, and the other end of the bracket pressure plate is detachably connected to the other end of the bracket seat, the positioning groove is V-shaped, and a supporting groove is provided on the inner side wall of the positioning groove, and a support column is provided in the supporting groove.

[0006] Preferably, the locking and positioning brackets are provided in two groups, and the axial center lines of the two groups of locking and positioning brackets coincide with each other.

[0007] Preferably, a threaded through hole is provided on the bracket pressure plate, and a clamping screw is provided in the threaded through hole.

[0008] Preferably, a first ear plate is provided at the other end of the bracket pressure plate, and second ear plates are provided on both sides of the bracket seat corresponding to the first ear plate. The first ear plate and the second ear plate are both provided with through holes in corresponding positions, and the first ear plate and the second ear plate are connected by pins.

[0009] Preferably, there are two plug gauge locating posts, and a coaxial plug gauge is movably sleeved on each plug gauge locating post.

[0010] Compared with the prior art, the utility model has the beneficial effect that, through the setting of the coaxiality plug gauge and the U-shaped groove, and the position setting of the locking positioning bracket, the coaxiality detection of the crankshaft can be achieved only by rotating the crankshaft, and the positioning accuracy of the crankshaft reference axis can be improved by setting the positioning groove on the positioning bracket. By setting two sets of coaxiality plug gauges, the coaxiality plug gauges with different U-shaped groove widths can be quickly replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a schematic diagram of the use state of the utility model.

[0013] In the figure: 1: base; 2: locking positioning bracket; 201: bracket seat; 202: support column; 203: bracket pressure plate; 204: clamping screw; 205: first ear plate; 206: second ear plate; 207: supporting groove; 208: pin; 209: positioning groove; 3: coaxial plug gauge; 4: plug positioning column; 5: plug positioning plate. DETAILED DESCRIPTION

[0014] The specific implementation method of the crankshaft coaxiality detection device of an aviation piston engine of the utility model is as follows Figure 1 and Figure 2 As shown, it includes a base 1, on which a locking and positioning bracket 2, a plug gauge positioning plate 5, a plug gauge positioning column 4 and a coaxial plug gauge 3 are provided. The plug gauge positioning plate 5 is arranged between the coaxial plug gauge 3 and the locking and positioning bracket 2. Two coaxial plug gauges 3 and two plug gauge positioning columns 4 are provided. One end of the coaxial plug gauge 3 is movably sleeved on the plug gauge positioning column 4. The coaxial plug gauge 3 is provided with a U-shaped groove, and the axial center line of the U-shaped groove is consistent with the axial center line direction of the locking and positioning bracket 2 and is on the vertical section of the locking and positioning bracket 2 along the axial direction;

[0015] There are two groups of locking and positioning brackets 2, and the axial center lines of the two groups of locking and positioning brackets 2 coincide. The locking and positioning bracket 2 includes a bracket seat 201 and a bracket pressure plate 203. A positioning groove 209 is provided on the bracket seat 201. One end of the bracket pressure plate 203 is hinged to one end of the bracket seat 201, and the other end of the bracket pressure plate 203 is detachably connected to the other end of the bracket seat 201. A first ear plate 205 is provided on the other end of the bracket pressure plate 203. Second ear plates 206 are provided on both sides of the bracket seat 201 corresponding to the first ear plate 205. The first ear plate 205 and the second ear plate 206 are both provided with through holes corresponding to the positions. The first ear plate 205 and the second ear plate 206 are connected by a pin 208. A threaded through hole is provided on the bracket pressure plate 203, and a clamping screw 204 is provided in the threaded through hole. The positioning groove 209 is V-shaped, and a supporting groove 207 is provided on the inner side wall of the positioning groove 209, and a support column 202 is provided in the support groove 207.

[0016] Working process: When in use, place the reference axis of the crankshaft to be tested in the positioning groove 209 of the bracket seat 201, support the reference axis with the support column 202, and face the section to be tested of the crankshaft toward the U-shaped groove, press the bracket pressing plate 203, make the through holes of the first ear plate 205 and the second ear plate 206 face each other, insert the pin 208 into the through hole, fix the bracket pressing plate 203 on the bracket seat 201, preliminarily fix the reference axis, and then rotate the clamping screw 204 to make the clamping screw 204 clamp the reference axis, and then select the coaxiality plug gauge 3 whose U-shaped groove width is adapted to the diameter of the section to be tested of the crankshaft. Here, the U-shaped groove width of the coaxiality plug gauge 3 can be the same as the diameter of the section to be tested, or It is slightly larger than the diameter of the inspected section. You can choose it according to the allowable error range. The purpose of setting two sets of coaxiality plug gauges 3 is to facilitate the rapid replacement of coaxiality plug gauges 3 of different widths. The coaxiality plug gauge 3 is placed close to the plug positioning plate 5, and the coaxiality plug gauge 3 is moved upward along the plug positioning column 4. If the U-shaped groove cannot pass through half of the inspected section, it proves that its coaxiality does not meet the requirements. If the U-shaped groove passes through half of the inspected section, loosen the clamping screw 204, pull out the pin 208, lift the bracket pressing plate 203, rotate the crankshaft 90 degrees around its own axis, and repeat the above operation. If the U-shaped groove passes through half of the inspected section again, it proves that the coaxiality of the crankshaft meets the requirements, otherwise it does not meet the coaxiality requirements.

[0017] The present invention is described by way of embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. A device for detecting the coaxiality of a crankshaft of an aviation piston engine, characterized in that: The invention comprises a base (1), on which a locking and positioning bracket (2), a plug positioning plate (5), a plug positioning column (4) and a coaxial plug gauge (3) are provided. The plug positioning plate (5) is arranged between the coaxial plug gauge (3) and the locking and positioning bracket (2). One end of the coaxial plug gauge (3) is movably sleeved on the plug positioning column (4). The coaxial plug gauge (3) is provided with a U-shaped groove. The axial center line of the U-shaped groove is consistent with the axial center line direction of the locking and positioning bracket (2) and is located on the vertical section of the locking and positioning bracket (2) along the axial direction.

2. The device for detecting the coaxiality of the crankshaft of an aviation piston engine according to claim 1, characterized in that: The locking positioning bracket (2) comprises a bracket seat (201) and a bracket pressure plate (203); a positioning groove (209) is provided on the bracket seat (201); one end of the bracket pressure plate (203) is hinged to one end of the bracket seat (201); the other end of the bracket pressure plate (203) is detachably connected to the other end of the bracket seat (201); the positioning groove (209) is V-shaped; a supporting groove (207) is provided on the inner side wall of the positioning groove (209); a supporting column (202) is provided in the supporting groove (207).

3. The device for detecting the coaxiality of the crankshaft of an aviation piston engine according to claim 1, characterized in that: The locking and positioning brackets (2) are provided in two groups, and the axial center lines of the two groups of locking and positioning brackets (2) coincide with each other.

4. The device for detecting the coaxiality of the crankshaft of an aviation piston engine according to claim 1, characterized in that: A threaded through hole is provided on the bracket pressing plate (203), and a clamping screw (204) is provided in the threaded through hole.

5. The device for detecting the coaxiality of the crankshaft of an aviation piston engine according to claim 2, characterized in that: A first ear plate (205) is provided at the other end of the bracket pressure plate (203), and second ear plates (206) are provided on both sides of the bracket seat (201) corresponding to the first ear plate (205). The first ear plate (205) and the second ear plate (206) are both provided with through holes at corresponding positions, and the first ear plate (205) and the second ear plate (206) are connected by a pin (208).

6. The device for detecting the coaxiality of the crankshaft of an aviation piston engine according to claim 1, characterized in that: There are two plug gauge positioning posts (4), and a coaxial plug gauge (3) is movably sleeved on each plug gauge positioning post (4).

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