阅读说明：本技术 一种涡轮盘榫槽对称度检测装置 (Turbine disc tongue-and-groove symmetry detection device ) 是由 唐晓东 赵丹 杨子英 郑松 陈佳慧 于 2019-11-05 设计创作，主要内容包括：本发明涉及一种涡轮盘榫槽对称度检测装置,包括表座、定位块、杠杆,定位块通过螺钉固定在表座底部,表座上固定有轴销,杠杆与轴销间隙配合；定位块下部为两个呈一定角度的面组成,其中杠杆测量端一侧的端面为支承面,与轴销的中心保持在同一竖直方向,另一斜面为定位面,与榫槽度面贴合；表座上开有竖直方向的通孔,内设有衬套用于放置百分表,表座侧面开有与通孔垂直的螺纹孔,用滚花圆柱紧定螺钉夹紧百分表；表座下部安装有一个沉头孔内置弹簧,保证在测量过程中杠杆始终接触测量面。本发明提供一种涡轮盘榫槽对称度检测装置,降低了工装制造难度和成本,结构简单、使用方便,能够减少人为误差。(The invention relates to a turbine disc mortise symmetry degree detection device which comprises a gauge stand, a positioning block and a lever, wherein the positioning block is fixed at the bottom of the gauge stand through a screw, a shaft pin is fixed on the gauge stand, and the lever is in clearance fit with the shaft pin; the lower part of the positioning block is composed of two surfaces with a certain angle, wherein the end surface at one side of the measuring end of the lever is a supporting surface and is kept in the same vertical direction with the center of the shaft pin, and the other inclined surface is a positioning surface and is jointed with the mortise surface; a through hole in the vertical direction is formed in the gauge stand, a bushing is arranged in the gauge stand and used for placing the dial indicator, a threaded hole perpendicular to the through hole is formed in the side face of the gauge stand, and the dial indicator is clamped by a knurled cylindrical set screw; the lower part of the gauge stand is provided with a counter bore built-in spring, so that the lever is ensured to be always contacted with the measuring surface in the measuring process. The turbine disc mortise symmetry degree detection device provided by the invention has the advantages that the tool manufacturing difficulty and cost are reduced, the structure is simple, the use is convenient, and the human error can be reduced.)

1. The utility model provides a turbine disc tongue-and-groove symmetry detection device which characterized in that: the positioning block is fixed at the bottom of the gauge stand through a screw, a shaft pin is fixed on the gauge stand, the lever is in clearance fit with the shaft pin, the positioning block is provided with grooves which are vertical to each other, and two ends of the lever rotate around the shaft pin in the two grooves of the positioning block respectively; the lower part of the positioning block is composed of two surfaces with a certain angle, wherein the end surface at one side of the measuring end of the lever is a supporting surface and is kept in the same vertical direction with the center of the shaft pin, and the other inclined surface is a positioning surface and is jointed with the mortise surface; a through hole in the vertical direction is formed in the gauge stand, a bushing is arranged in the gauge stand and used for placing the dial indicator, a threaded hole perpendicular to the through hole is formed in the side face of the gauge stand, and the dial indicator is clamped by a knurled cylindrical set screw; the lower part of the gauge stand is provided with a counter bore built-in spring, so that the lever is ensured to be always contacted with the measuring surface in the measuring process.

2. The turbine disk mortise symmetry detection device of claim 1, characterized in that: the locating piece is close to the chamfer of the lever measuring end, so that interference with the turbine disc mortise during measurement is avoided.

3. The turbine disk mortise symmetry detection device of claim 1, characterized in that: the lever has a 90-degree corner, so that the transmission of a measured value is realized, and the non-measuring end extends out of the gauge stand to be longer than the gauge stand, so that the lever is convenient to take.

4. The turbine disk mortise symmetry detection device of claim 1, characterized in that: the lever and the shaft pin keep a gap of 0.005-0.01 mm; the two side surfaces of the lever and the meter seat keep a gap of 0.005-0.01 mm.

5. The turbine disk mortise symmetry degree detection device according to claim 1, wherein an included angle between the lower support surface of the positioning block and the positioning surface is α ± 5 degrees, wherein α is a disk mortise angle.

6. The turbine disk mortise symmetry detection device of claim 1, characterized in that: the gauge stand adopts 45# steel, the lever adopts CrWMn, and the locating piece adopts 20# steel.

Technical Field

The invention belongs to the technical field of detection of fir-tree mortises of aero-engines, and particularly relates to a turbine disc mortise symmetry degree detection device.

Background

The aeroengine disc comprises a wheel rim, an auxiliary plate, a wheel hub and a sealing labyrinth, wherein a mortise for mounting a blade is arranged on the wheel hub, the shape and size and the position precision of the mortise relate to the symmetry of the blade after transferring and the rotating stability in the test run process, but the projection detection method adopted for detecting the symmetry of the engine turbine disc mortise is very inconvenient to operate, long in detection time, low in efficiency and incapable of detecting on a machine tool. Therefore, a device for detecting the symmetry of the mortise of the turbine disk of the engine, which is convenient and rapid to detect and has an accurate result, is needed.

Disclosure of Invention

Aiming at the defects in the prior art, the turbine disc mortise symmetry degree detection device provided by the invention has the advantages that the tool manufacturing difficulty and cost are reduced, the structure is simple, the use is convenient, and the human error can be reduced.

The invention is realized by adopting the following technical scheme:

a turbine disc mortise symmetry degree detection device comprises a gauge stand, a positioning block and a lever, wherein the positioning block is fixed at the bottom of the gauge stand through a screw, a shaft pin is fixed on the gauge stand, the lever is in clearance fit with the shaft pin, the positioning block is provided with mutually vertical grooves, and two ends of the lever rotate around the shaft pin in two grooves of the positioning block respectively; the lower part of the positioning block is composed of two surfaces with a certain angle, wherein the end surface at one side of the measuring end of the lever is a supporting surface and is kept in the same vertical direction with the center of the shaft pin, and the other inclined surface is a positioning surface and is jointed with the mortise surface; a through hole in the vertical direction is formed in the gauge stand, a bushing is arranged in the gauge stand and used for placing the dial indicator, a threaded hole perpendicular to the through hole is formed in the side face of the gauge stand, and the dial indicator is clamped by a knurled cylindrical set screw; the lower part of the gauge stand is provided with a counter bore built-in spring, so that the lever is ensured to be always contacted with the measuring surface in the measuring process.

The locating piece is close to the chamfer of the lever measuring end, so that interference with the turbine disc mortise during measurement is avoided.

The lever has a 90-degree corner, so that the transmission of a measured value is realized, and the non-measuring end extends out of the gauge stand to be longer than the gauge stand, so that the lever is convenient to take.

The lever and the shaft pin keep a gap of 0.005-0.01 mm; the two side surfaces of the lever and the meter seat keep a gap of 0.005-0.01 mm.

The included angle between the lower supporting surface of the positioning block and the positioning surface is α +/-5 degrees, wherein α is the angle of the disc mortise.

The gauge stand adopts 45# steel, the lever adopts CrWMn, and the locating piece adopts 20# steel.

The invention has the beneficial effects that: according to the invention, the degree surface of the disc mortise is adopted for positioning, the rolling bar for the disc mortise machining process is adopted in the detection process to realize the pressing and positioning of the detection device, the detection state is directly and truly reflected, and the measurement accuracy is high in the state. Compared with the prior art, the device can effectively avoid the interference problem of parts on measurement, accurately and quickly measure the symmetry degree of the disc tenon groove, is simple and easy to operate, is convenient and quick, reduces human errors, can improve the production efficiency, and has practical application value.

Drawings

FIG. 1 is a front view of a turbine disk mortise symmetry detection apparatus according to the present invention;

FIG. 2 is a left side view of a turbine disk mortise symmetry detection apparatus of the present invention;

FIG. 3 is a bottom view of the turbine disk mortise symmetry detection apparatus of the present invention;

wherein the content of the first and second substances,

the roller bearing comprises a gauge stand 1, a lever 2, a positioning block 3, a slotted cylinder head screw 4, a bushing 5, a compression spring 6, a knurled cylinder set screw 7, a shaft pin 8, a bearing surface 9, a positioning surface 10 and a rolling rod 11.

Detailed Description

For better understanding of the present invention, the technical solutions and effects of the present invention will be described in detail by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1-3, a turbine disc tongue-and-groove symmetry degree detection device comprises a meter seat 1, a positioning block 3 and a lever 2, wherein the positioning block 3 is fixed at the bottom of the meter seat 1 through a slotted cylinder head screw 4, a shaft pin 8 is fixed on the meter seat 1, the lever 2 is in clearance fit with the shaft pin 8, a clearance is kept between 0.005 and 0.01mm between two side surfaces of the lever 2 and the meter seat 1, and the lever 2 has a 90-degree corner, so that transmission of a measured value is realized; the positioning block 3 is provided with grooves which are vertical to each other, two ends of the lever 2 rotate around the shaft pin 8 in the two grooves of the positioning block 3 respectively, and the non-measuring end extends out to be longer than the gauge stand 1, so that the lever 2 can be taken conveniently. The positioning block 3 is close to the chamfer of the measuring end of the lever 2, so that the interference with the mortise of the turbine disc during measurement is avoided.

The lower part of the positioning block 3 is composed of two surfaces with certain angles, two angular directions are controlled, wherein the end surface on one side of the measuring end of the lever 2 is a bearing surface 9, the bearing surface and the center of the shaft pin 8 are kept in the same vertical direction to provide the pressing and supporting effects of the roller 11, the other inclined surface is a positioning surface 10, the inclined surface is in fit with the mortise surface, the included angle between the bearing surface 9 and the positioning surface 10 is α +/-5 degrees, wherein α is the angle of the disc mortise, and the space position of the diameter size of the cylindrical roller 11 used in measurement is considered, so that the stable state of tangential clamping is ensured to be formed between the disc mortise, the roller 11 and the detection positioning block 3 during measurement.

A through hole in the vertical direction is formed in the gauge stand 1, a bushing 5 is arranged in the through hole and used for placing a dial indicator, a threaded hole perpendicular to the through hole is formed in the side face of the gauge stand 1, and the dial indicator is clamped by a knurled cylindrical set screw 7; the lower part of the gauge stand 1 is provided with a counter bore in which a compression spring 6 is arranged, so that the lever 2 is ensured to be always contacted with a measuring surface in the measuring process.

In order to ensure the stability of measurement and reduce the weight as much as possible, 45# steel is adopted for the gauge stand 1, CrWMn is adopted for the lever 2, and 20# steel is adopted for the positioning block 3.

In the measuring process, one degree surface of a disc mortise is used as a positioning reference surface, a positioning surface 10 of the device is attached to the positioning reference surface, a rolling bar 11 is placed in the disc mortise, the moving device presses the rolling bar by using a supporting surface, tangential clamping is formed among the disc mortise, the rolling bar 11 and a detection positioning block 3, and at the moment, the measuring end of a lever 2 is in contact with the measured disc mortise degree surface to perform reading; and then taking the other degree surface of the disc mortise as a positioning reference surface, measuring the other degree surface by adopting the mode, and comparing the two measurement results.

According to the invention, the two degree surfaces of one disc mortise are measured and read, the symmetry value of the disc mortise can be rapidly determined, the operation is simple, the problem that the symmetry of the disc mortise cannot be measured on a machine tool on line at present is solved, in addition, the device can increase the positioning reference by increasing the rolling bar 11 and the positioning surface according to the specific requirements in the assembling process, so that the positioning stability is increased, and the chamfer surface of the positioning block 3 is added to the inclined turbine disc mortise.