CN215114290U

CN215114290U - First-stage blade wear measuring clamp

Info

Publication number: CN215114290U
Application number: CN202120825161.XU
Authority: CN
Inventors: 李小焰; 蒋元春; 张安华; 黄波
Original assignee: Sichuan Tengfei Aviation Industry Co ltd
Current assignee: Sichuan Tengfei Aviation Industry Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-12-10
Anticipated expiration: 2031-04-21

Abstract

The utility model relates to the technical field of a primary blade abrasion measuring clamp, which comprises a fixed clamping block, a movable clamping block, an elongated mandrel and a supporting structure which is provided with a middle through cavity and has a long cylindrical main body; the lengthened mandrel is arranged in a middle through cavity of the supporting structure in a left-right sliding manner, the fixed clamping block is combined with the right end of the supporting structure through a screw to form an inner guide rail, the movable clamping block is connected with the right end of the lengthened mandrel through a connecting rod mechanism, and the movable clamping block can slide up and down along the inner guide rail; the supporting structure comprises a spring positioning sleeve positioned at the left end, a return spring is coaxially sleeved in the spring positioning sleeve, the left end of the lengthened mandrel extends out of the supporting structure to be provided with an end cover nut, and the supporting structure is further provided with a scale structure used for reading displacement data. The utility model discloses the beneficial effect who reaches is: the method solves the problem that the abrasion loss of the primary blade of the engine is measured on the helicopter during the regular inspection, and has simple use method and high measurement precision.

Description

First-stage blade wear measuring clamp

Technical Field

The utility model relates to an aeroengine one-level blade detects technical field, especially one-level blade wear measuring anchor clamps.

Background

Due to the aerodynamic characteristics of the blade, the airfoil must have precise dimensions, precise shape, and strict surface integrity. Along with the higher performance requirement of the aero-engine, the precision requirement of the primary blade is higher. Therefore, after the aircraft engine works on the helicopter equipped with the aircraft engine for a certain time, the abrasion loss of the first-stage blade needs to be detected. The detection aim is to detect the abrasion loss of the first-stage blade and judge whether the first-stage blade can be continuously used or not by utilizing a measurement result so as to ensure the performance of the engine.

For example, after an aircraft engine of a certain type is used, due to the fact that the aircraft engine rotates at a high speed when the aircraft engine works, blades are abraded due to various factors such as dust in air, and therefore after the aircraft engine works on a helicopter equipped with the aircraft engine for a certain time, the abrasion loss of a first-stage blade needs to be detected. When the abrasion loss of the primary blade of the aero-engine is measured on a helicopter equipped with the aero-engine, the aero-engine air inlet hood is arranged at the front end of the aero-engine, the primary blade is arranged at the rear end of the air inlet hood, and the length of the air inlet hood is 700 millimeters. The internal space of the engine is narrow, the distance between blades is small, and the abrasion loss of the primary blade of the aero-engine cannot be measured by a conventional measuring mode.

Therefore, it is necessary to design a special fixture for measuring the wear of the first-stage blade to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide an one-level blade wearing and tearing measuring anchor clamps, solved when the helicopter examines regularly and carry out the measurement of engine one-level blade wearing and tearing volume on the machine, its application method is simple, and measurement accuracy is high.

The purpose of the utility model is realized through the following technical scheme: comprises a fixed clamping block, a movable clamping block, a lengthened mandrel and a supporting structure with a long cylindrical main body;

the lengthened mandrel is arranged in a middle through cavity of the supporting structure in a left-right sliding manner, the fixed clamping block is combined with the right end of the supporting structure through a screw to form an inner guide rail, the movable clamping block can slide up and down along the inner guide rail, and the movable clamping block is connected with the right end of the lengthened mandrel through a connecting rod mechanism;

the support structure comprises a spring positioning sleeve positioned at the left end, a return spring is coaxially sleeved in the spring positioning sleeve, an end cover nut is arranged at the left end of the lengthened mandrel and extends out of the support structure, when measurement is to be conducted, the end cover nut pushes a limiting end sleeve rightwards to compress the return spring, meanwhile, the lengthened mandrel moves rightwards and drives the movable clamping block to move downwards through a connecting rod mechanism, and the distance between the movable clamping block and the fixed clamping block is increased; and the supporting structure is also provided with a scale structure for reading displacement data. The design of the lengthening structure of the lengthening mandrel and the supporting structure enables the first-stage blade abrasion measuring clamp to stretch into the first-stage blade for abrasion amount measurement, and the lengthening mandrel can slide left and right on the supporting structure, so that the amount of exercise of the movable clamping block can be accurately transmitted, and the measured displacement amount can be accurately transmitted.

Furthermore, the supporting structure also comprises a carving plate placing frame, a lengthened guide pipe and a lengthened positioning rod which are sequentially connected;

the right end of the spring positioning sleeve is connected with the engraving plate placing frame, and the fixed clamping block is fixed at the right end of the extension positioning rod.

Furthermore, the inner guide rail and the axis of the lengthening mandrel form an angle of alpha degrees, so that during measurement, the fixed clamping block is tightly attached to the first-stage blade, and the axis of the lengthening mandrel is parallel to the axis of the engine. For accurate wearing capacity measurement, in the measurement process, the axis of the clamp needs to be parallel to the axis of the engine, and the first-stage blade wearing capacity measurement clamp can be prevented from deviating, so that the accuracy of wearing capacity measurement data is influenced.

Furthermore, the limiting end sleeve is provided with a limiting clamping groove, the spring positioning sleeve is provided with a protruding pin matched with the limiting clamping groove, and when the limiting end sleeve is rotated to enable the limiting clamping groove to be clamped into the protruding pin on the spring positioning sleeve, the distance between the movable clamping block and the fixed clamping block reaches the maximum value L. The design of the limiting clamping groove and the protruding pin can prevent the limiting threaded sleeve from retreating.

Furthermore, the scale structure comprises a half-section waist hole arranged on the scale plate placing frame, a scale plate is axially fixed on a half-section of the half-section waist hole, and a scale line is carved on the lengthened mandrel corresponding to the position of the scale line on the scale plate. So as to read the variation value of the position change of the scribed line on the lengthened mandrel and the scribed line on the scribing plate during measurement.

Furthermore, the connecting rod mechanism comprises a rotating wheel, a first connecting piece and a second connecting piece, and the rotating wheel is hinged on the extension positioning rod through a step rotating shaft;

the lengthened mandrel is hinged with the rotating wheel through a first connecting piece, and the movable clamping block is hinged with the rotating wheel through a second connecting piece. The design of the first connecting piece and the second connecting piece is favorable for ensuring that the inner guide rail and the axis of the lengthened mandrel form an alpha-degree angle.

Furthermore, the first-stage blade abrasion measuring clamp is also provided with a gauge part, and the gauge part comprises a standard gauge block with the thickness equal to that of the standard first-stage blade. Before measurement, a standard gauge block is clamped between the fixed clamping block and the movable clamping block, the movable clamping block and the fixed clamping block are clamped and attached to the standard gauge block, and the relative positions of a scribed line on the lengthened mandrel and a scribed line on the scribing plate at the moment are read and recorded so as to facilitate subsequent calculation and use.

Furthermore, the pair of gauge parts also comprises a locking screw, and when the gauge parts are not used, the standard gauge block is fixed on the lengthened guide pipe through the locking screw. So as to be convenient for taking at any time when in use.

The utility model has the advantages of it is following: (1) this scheme adopts the extension structure, stretches into one-level blade department and carries out wearing and tearing volume measurement, and the extension mandrel is downthehole to slide in the bearing structure in a flexible way, does not take place the jamming during slip and can the accurate amount of exercise that transmits the activity clamp splice to will measure the accurate transmission of numerical value, solved the helicopter and carried out the measurement of engine one-level blade wearing and tearing volume on the machine when examining regularly.

(2) Through pressing end cap nut into fixed measuring end, rotate spacing pot head and make its upper limit draw-in groove block spring position sleeve on the operation such as protrusion round pin or withdraw from protrusion round pin on the spring position sleeve, can carry out the measurement of one-level blade wearing and tearing volume, only need the reading and record reticle relative position on line and the reticle on the extension mandrel this moment after the measurement, the data that will measure one-level blade and measure when setting up the table piece are compared, calculate and can get the wearing and tearing volume, therefore this scheme easy operation, and the measuring accuracy is high.

(3) In this scheme, inner guide rail is alpha angle with extension mandrel axis, and during the measurement, extension mandrel axis is parallel with the engine axis when fixed clamp splice is closely laminated with the one-level blade, and the anchor clamps axis is parallel to the engine axis is surveyed in the wearing and tearing of one-level blade to the measurement accuracy height of this scheme has further been ensured.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a left end sectional view of the present invention;

FIG. 3 is a right end sectional view of the present invention;

fig. 4 is a schematic left-end structure diagram of the present invention;

FIG. 5 is a schematic view of the right end structure of the present invention;

in the figure: 1-fixed clamping block, 2-movable clamping block, 3-spring positioning sleeve, 4-cutting plate placing rack, 5-lengthened guide pipe, 6-lengthened positioning rod, 7-lengthened mandrel, 8-rotating wheel, 9-step rotating shaft, 10-inner guide rail, 11-reset spring, 12-limiting end sleeve, 13-end cover nut, 14-limiting clamping groove, 15-protruding pin, 16-half-cut waist hole, 17-cutting plate, 18-standard measuring block, 19-locking screw, 20-first connecting piece and 21-second connecting piece.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1-2, the first-stage blade wear measuring clamp comprises a fixed clamping block 1, a movable clamping block 2, a lengthened mandrel 7, a return spring 11, a gauge part, and a supporting structure formed by sequentially connecting a spring positioning sleeve 3, a cutting board placing frame 4, a lengthened guide pipe 5 and a lengthened positioning rod 6; reset spring 11 is located spring position sleeve 3, and the butt is between

spacing end cover

12 and 4 left end faces of carving board rack, spacing end cover 12 is equipped with spacing draw-in groove 14, spring position sleeve 3 is equipped with the salient tip that corresponds with spacing draw-in groove 14, add long mandrel 7 and set up in bearing structure, and add long mandrel 7 and can follow the bearing structure axis horizontal slip, it is connected with end cover nut 13 to add long mandrel 7 left end, it is articulated with runner 8 that add long mandrel 7 right-hand member through connecting piece one 20, activity clamp splice 2 is articulated with runner 8 through connecting piece two 21, runner 8 articulates on extension locating lever 6 through step pivot 9, fixed clamp splice 1 combines and forms inner guide 10 through the screw with extension locating lever 6, activity clamp splice 2 can reciprocate along inner guide 10.

In this scheme, extension mandrel 7 to and bearing structure's extension structural design, enable one-level blade wear to measure anchor clamps and stretch into one-level blade department and carry out the wearing and tearing volume and measure, and extension mandrel 7 slides in bearing structure in a flexible way, does not take place the jamming during slip and can accurate transmission activity clamp splice 2's amount of exercise, thereby will measure the accurate transmission of numerical value, and then carried out the measurement of engine one-level blade wearing and tearing volume on the machine when having solved the helicopter and having examined regularly.

Meanwhile, in order to read numerical values conveniently, the scribing board placing frame 4 is provided with a half-section waist hole 16, a scribing board 17 is fixed on the half-section, scribing lines are carved on positions, corresponding to the scribing boards 17, of the lengthened mandrel 7, the scribing lines are arranged, the first-stage blade abrasion measuring clamp is further provided with a gauge part composed of a standard gauge block 18 and a locking screw 19, the gauge part is used for obtaining the thickness of the standard first-stage blade, the gauge part is used for subsequent measurement and calculation, and when the gauge part is not used, the gauge part is fixed on the lengthened guide pipe 5 through the locking screw 19, and the gauge part can be taken at any time.

In the measuring process, the axis of the first-stage blade abrasion measuring clamp needs to be parallel to the axis of an engine, if the first-stage blade abrasion measuring clamp deviates, the accuracy of abrasion measuring data can be influenced, therefore, the inner guide rail 10 and the axis of the lengthening mandrel 7 are in an alpha-degree angle in the scheme, so that when the measurement is carried out, the axis of the lengthening mandrel 7 is parallel to the axis of the engine while the fixing clamping block 1 is tightly attached to the first-stage blade, the accuracy of the measurement is favorably guaranteed, and the alpha-degree angle is calculated after the installation angle of the first-stage blade on the engine is accurately measured.

When the device is used for measurement, the limiting clamping groove 14 is withdrawn from the protruding pin 15 on the spring positioning sleeve 3, the end of the fixed clamping block 1 is pressed into the end cap nut 13, the lengthened mandrel 7 drives the movable clamping block 2 to move by using the rotating wheel 8, the distance between the fixed clamping block 1 and the movable clamping block 2 is adjusted to be the maximum L, the gauge-checking piece is clamped between the fixed clamping block 1 and the movable clamping block 2, the end cap nut 13 is released, the movable clamping block 2 is clamped on the gauge-checking piece, and the relative position of a scribed line on the lengthened mandrel 7 and a scribed line on the line-marking plate 17 is read and recorded. Taking out the meter-aligning part, pressing the limiting end sleeve 12 into the end of the spring positioning sleeve 3, rotating the limiting end sleeve 12 to enable the limiting clamping groove 14 on the limiting end sleeve 12 to clamp the protruding pin 15 on the spring positioning sleeve 3 to prevent the limiting end sleeve 12 from retreating, and enabling the distance value between the fixed clamping block 1 and the movable clamping block 2 to be at the maximum value L. At the moment, the tail part of the end of the limiting end sleeve 12 of the primary blade abrasion measuring clamp is held, the primary blade abrasion measuring clamp extends into the position of the primary blade of the engine along an engine air inlet cover, the fixed clamping block 1 is attached to one primary blade, the limiting end sleeve 12 is rotated, the clamping groove of the limiting end sleeve 12 is withdrawn from the protruding pin 15 on the spring positioning sleeve 3, the movable measuring block 2 and the fixed measuring block 1 clamp the primary blade, and the relative positions of the scribed line on the lengthening mandrel 7 and the scribed line on the scribing plate 17 are read and recorded. And comparing the data with the data recorded in the measurement of the surface member, and calculating to obtain the difference value, namely the wear loss of the first-stage blade.

The preferred size design of extension mandrel 7 when this scheme is applied to certain model aeroengine: the diameter of the lengthened mandrel 7 is 6mm, and the length of the lengthened mandrel 7 is 800 mm.

Claims

1. One-level blade wear measures anchor clamps, its characterized in that:

comprises a fixed clamping block (1), a movable clamping block (2), a lengthened mandrel (7) and a supporting structure with a long cylindrical main body;

the lengthened mandrel (7) can be arranged in a middle through cavity of the supporting structure in a left-right sliding mode, the fixed clamping block (1) is combined with the right end of the supporting structure through a screw to form an inner guide rail (10), the movable clamping block (2) can slide up and down along the inner guide rail (10), and the movable clamping block (2) is connected with the right end of the lengthened mandrel (7) through a connecting rod mechanism;

the support structure comprises a spring positioning sleeve (3) positioned at the left end, a return spring (11) is coaxially sleeved in the spring positioning sleeve (3), an end cover nut (13) is arranged at the left end of the lengthening mandrel (7) and extends out of the support structure, when measurement is to be conducted, the end cover nut (13) pushes a limiting end sleeve (12) rightwards to compress the return spring (11), the lengthening mandrel (7) moves rightwards at the same time, the movable clamping block (2) is driven to move downwards through a connecting rod mechanism, and the distance between the movable clamping block (2) and the fixed clamping block (1) is increased;

and the supporting structure is also provided with a scale structure for reading displacement data.

2. The primary bucket wear measurement fixture of claim 1, wherein:

the support structure also comprises a carving plate placing frame (4), a lengthened guide pipe (5) and a lengthened positioning rod (6) which are connected in sequence;

the right end of the spring positioning sleeve (3) is connected with the engraving plate placing frame (4), and the fixed clamping block (1) is fixed at the right end of the extension positioning rod (6).

3. The primary bucket wear measurement fixture of claim 1, wherein: the inner guide rail (10) and the axis of the lengthening mandrel (7) form an alpha-degree angle, so that during measurement, the axis of the lengthening mandrel (7) is parallel to the axis of the engine while the fixed clamping block (1) is tightly attached to the first-stage blade.

4. The primary bucket wear measurement fixture of claim 1, wherein: spacing end sleeve (12) be equipped with spacing draw-in groove (14), spring position sleeve (3) be equipped with spacing draw-in groove (14) matched with protrusion round pin (15), rotatory spacing end sleeve (12) make spacing draw-in groove (14) card go into spring position sleeve (3) on protrusion round pin (15), activity clamp splice (2) and fixed clamp splice (1) interval reach maximum value L.

5. The primary bucket wear measurement fixture of claim 2, wherein: the scale structure comprises a half-section waist hole (16) arranged on the scale placing frame (4), a scale plate (17) is axially fixed on a half-section of the half-section waist hole (16), and a scale line is carved on the position, corresponding to the scale line, of the scale plate (17) of the lengthened mandrel (7).

6. The primary bucket wear measurement fixture of claim 5, wherein: the connecting rod mechanism comprises a rotating wheel (8), a first connecting piece (20) and a second connecting piece (21), and the rotating wheel (8) is hinged to the extension positioning rod (6) through a step rotating shaft (9);

the lengthened mandrel (7) is hinged with the rotating wheel (8) through a first connecting piece (20), and the movable clamping block (2) is hinged with the rotating wheel (8) through a second connecting piece (21).

7. The primary bucket wear measurement fixture of claim 6, wherein: the first-stage blade abrasion measuring clamp is further provided with a gauge piece, and the gauge piece comprises a standard gauge block (18) with the thickness equal to that of the standard first-stage blade.

8. The primary bucket wear measurement fixture of claim 7, wherein: the gauge part also comprises a locking screw (19), and when the gauge part is not used, the standard gauge block (18) is fixed on the lengthened guide pipe (5) through the locking screw (19).