High-temperature friction test device

Abstract

The utility model relates to the field of product testing, in particular to a high-temperature friction testing device which comprises a base plate, a testing tool, a pipeline, a hoop, a force sensor, a pair of heating devices and a thermocouple, the pipeline, the hoop, the force sensor, the pair of heating devices and the thermocouple are arranged in the testing tool, the testing tool comprises a tool body and a flange cover, and the tool body comprises a first arc-shaped plate and a second arc-shaped plate. The flange covers comprise the first flange cover and the second flange cover, a round hole is formed in the middle of each flange cover, the first arc-shaped plate and the second arc-shaped plate are connected with the first flange cover and the second flange cover respectively, the clamping hoop is clamped on a pipeline in the test tool, and the upper end of the pipeline extends out of the round hole in the middle of each flange cover. The upper end of the pipeline is sequentially connected with the switching tool and the screw rod, and the heating devices are symmetrically arranged on the two sides of the test tool. According to the utility model, the friction force test can be carried out on different hoops at high temperature only by replacing the flange cover, and the problem that the existing test device does not have universality is solved.

Description

Technical Field

[0001] The utility model relates to the field of product testing, in particular to a high-temperature friction testing device. Background Art

[0002] At present, the engine pipes and engines on many aircraft and warships are fixed by clamps. When the engine is working, a large amount of heat will be generated. The heat will be conducted through the pipes, affecting the friction of the clamps. In order to verify whether the friction of the clamps meets the use requirements under high temperature conditions, a set of high-temperature thermal friction test equipment needs to be designed to verify it.

[0003] Most of the existing test devices test friction at room temperature and cannot simulate the stress state under real conditions. In addition, there are various types of engine pipes and different specifications of clamps, so the existing equipment is often not universal. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a high temperature friction test device.

[0005] The utility model is realized according to the following technical scheme:

[0006] A high-temperature friction test device, comprising a substrate, a test fixture, a pipeline arranged in the test fixture, a clamp, a force sensor, a pair of heating devices and a thermocouple, the test fixture comprising a fixture body and a flange cover, the fixture body comprising a first arc plate and a second arc plate of the same shape and size and symmetrically arranged, the first arc plate and the second arc plate are cylindrical as a whole, the first arc plate and the second arc plate are symmetrically provided with openings on the side walls, the first arc plate and the second arc plate are respectively provided with a first flange end face and a second flange end face on the upper ends, the flange cover is a circular structure as a whole, a circular hole is provided in the middle of the flange cover, the flange cover comprises a first arc plate and a second arc plate of the same shape and size and symmetrically arranged A first flange cover and a second flange cover are provided, and the first flange end face and the second flange end face are respectively connected to the first flange cover and the second flange cover by bolts. The upper end of the pipeline provided in the test fixture passes through the test fixture and extends out from the circular hole in the middle of the flange cover. The clamp is clamped on the pipeline in the test fixture. Both ends of the pipeline extend outward to form a third flange end face and a fourth flange end face respectively. The upper end of the third flange end face is connected to the adapter fixture, and the middle part of the adapter fixture is connected to the lower end of the screw. The heating device includes a rectangular shell and a quartz lamp heating rod installed on the inner surface of the rectangular shell. The pair of heating devices are symmetrically arranged on both sides of the test fixture.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] 1. The tooling body of the utility model is designed to be divided into two parts, which is convenient for quick replacement of the clamp;

[0009] 2. The utility model only needs to replace the flange cover according to the pipelines with different diameters, that is, replace the flange cover with circular holes of different sizes in the middle, so that the friction force test can be carried out for different clamps at high temperature;

[0010] 3. The utility model can effectively carry out friction test under high temperature, evaluate whether the friction of the clamp under high temperature state meets the use requirements, and provide a basis for theoretical simulation calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the utility model Figure 1 ;

[0012] Figure 2 This is a schematic diagram of the utility model Figure 2 ;

[0013] Figure 3 It is a schematic diagram of the combination of the test fixture and the base plate;

[0014] Figure 4 is a schematic diagram of the test tooling;

[0015] Figure 5 This is a schematic diagram of the tooling body. Figure 1 ;

[0016] Figure 6 This is a schematic diagram of the tooling body. Figure 2 ;

[0017] Figure 7 It is a schematic diagram of the flange cover;

[0018] Figure 8 is a schematic diagram of the heating device;

[0019] Fig. 9 It is a schematic diagram of the transfer tooling;

[0020] Fig.10 It is a schematic diagram of the combination of pipeline, clamp and thermocouple;

[0021] Fig.11 It is a schematic diagram of the combination of pipelines, clamps, adapters, screws, force sensors and thermocouples.

[0022] Among them, 1-substrate, 2-test tooling, 21-tooling body, 211-first arc plate, 212-second arc plate, 213-opening, 214-first flange end face, 215-second flange end face, 216-fifth flange end face, 217-sixth flange end face, 22-flange cover, 221-first flange cover, 222-second flange cover, 223-first circular arc, 224-second circular arc, 3-pipeline, 311-third flange end face, 312-fourth flange end face, 4-clamp, 5-force sensor, 6-heating device, 611-rectangular shell, 612-quartz lamp heating rod, 7-thermocouple, 8-transfer tooling, 9-screw. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1-Figure 11 As shown, a high-temperature friction test device includes a substrate 1, a test fixture 2, a pipeline 3 arranged in the test fixture 2, a clamp 4, a force sensor 5, a pair of heating devices 6 and a thermocouple 7, the test fixture 2 includes a fixture body 21 and a flange cover 22, the fixture body 21 includes a first arc plate 211 and a second arc plate 212 of the same shape and size and symmetrically arranged, the first arc plate 211 and the second arc plate 212 are cylindrical as a whole, the first arc plate 211 and the second arc plate 212 are symmetrically provided with openings 213 on the side walls, the first arc plate 211 and the second arc plate 212 are respectively provided with a first flange end face 214 and a second flange end face 215 at the upper ends, the flange cover 22 is a circular structure as a whole, a circular hole is provided in the middle of the flange cover 22, and the flange cover 22 includes a first arc plate 211 and a second arc plate 212 of the same shape and size. The first flange cover 221 and the second flange cover 222 are symmetrically arranged, the first flange end face 214 and the second flange end face 215 are respectively connected to the first flange cover 221 and the second flange cover 222 by bolts, the upper end of the pipeline 3 arranged in the test fixture 2 passes through the test fixture 2 and extends out from the circular hole in the middle of the flange cover 22, the clamp 4 is clamped on the pipeline 3 in the test fixture 2, and the two ends of the pipeline 3 extend outward to form a third flange end face 311 and a fourth flange end face 312 respectively, the upper end of the third flange end face 311 is connected to the adapter fixture 8, and the middle part of the adapter fixture 8 is connected to the lower end of the screw 9, the heating device 6 includes a rectangular shell 611 and a quartz lamp heating rod 612 installed on the inner surface of the rectangular shell 611, and the pair of heating devices 6 are symmetrically arranged on both sides of the test fixture 2.

[0025] In the high temperature friction test device, the first flange cover 221 and the second flange cover 222 are respectively provided with a first arc 223 and a second arc 224 . The first arc 223 and the second arc 224 are symmetrically arranged, have the same shape and size, and are generally in a circular hole structure.

[0026] The high temperature friction test device has the first arc plate 211 and the second arc plate 212 whose lower ends extend outward to form a fifth flange end face 216 and a sixth flange end face 217 respectively, and the fifth flange end face 216 and the sixth flange end face 217 are both connected to the base plate 1 by bolts.

[0027] In the high-temperature friction test device, the force sensor 5 is fixed on the screw 9 , and the thermocouple 7 is fixed on the surface of the pipeline 3 in the test fixture 2 .

[0028] The openings 213 on the side walls of the first arc plate 211 and the second arc plate 212 are used to allow the heat generated by the heating device 6 to radiate to the surfaces of the pipe 3 and the clamp 4, so that the surfaces of the pipe 3 and the clamp 4 are quickly heated up.

[0029] The circular hole formed by the first circular arc 223 and the second circular arc 224 is the circular hole in the middle of the flange cover 22 , and the upper end of the pipeline 3 extends out from the circular hole in the middle of the flange cover 22 , that is, extends out from between the first circular arc 223 and the second circular arc 224 .

[0030] The two ends of the pipeline 3 extend outward to form a third flange end face 311 and a fourth flange end face 312 respectively. The diameters of the third flange end face 311 and the fourth flange end face 312 are the same and larger than the size of the circular hole in the middle of the flange cover 22. Due to the cooperation between the fourth flange end face 312 and the flange cover 22, the lower end of the pipeline 3 and the clamp 4 are prevented from escaping from the top of the tooling body 21. The third flange end face 311 and the fourth flange end face 312 are used to connect with other pipelines outside the test.

[0031] The adapter tooling 8 is cylindrical as a whole, with a circle of screw holes arranged around it and screw holes also arranged in the middle. The adapter tooling 8 and the third flange end face 311 are connected by bolts; threads are arranged at both ends of the screw rod 9, the lower end of the screw rod 9 is screwed together with the middle part of the adapter tooling 8, and the upper end is connected to the testing machine through a clamp.

[0032] The heating device 6 is mainly composed of a rectangular shell 611 and multiple groups of quartz heating rods 612 or silicon carbon rods installed on the inner surface of the rectangular shell 611. Insulating asbestos is arranged inside. The surface temperature of the clamp 4 is monitored by a thermocouple 7. The heating device 6 can be adjusted according to the required temperature of the test, and the maximum temperature can reach 1600°C.

[0033] The circular hole in the middle of the flange cover 22 is designed directly according to the diameter of the pipeline 3, which is generally 2 to 5 mm larger than the diameter of the pipe part 3. Pipe parts 3 of different diameters can be replaced during the test; the tooling body 21 is designed into two parts to facilitate the quick replacement of the clamp 4, and the distance between the two parts does not need to be adjusted.

[0034] During the test, the utility model is installed on a testing machine. Specifically, the base plate 1 is connected to the test platform on the testing machine. For example, an electro-hydraulic testing machine of model SDS-50 is used. The operation of the testing machine drives the screw 9, the pipeline 3 and the clamp 4 to move upward together. When the clamp 4 contacts the flange cover 22, the clamp 4 stops moving due to the obstruction of the flange cover 22, and the pipeline 3 continues to move upward through the circular hole in the middle of the flange cover 22. At this time, friction is formed between the pipeline 3 and the clamp 4.

[0035] The force sensor 5 is connected to the computer system, and the force sensor 5 can collect load data. The thermocouple 7 is attached to the lower part of the pipeline 3 in the test fixture 2 and connected to the data acquisition instrument so that the data can be output in real time and processed by the computer. A Donghua 5902G data acquisition instrument or a general data acquisition instrument with data recording function can be used.

[0036] The specific steps of the experiment are as follows:

[0037] 1) Fix the two parts of the tool body 21 on the base plate 1, and the distance between the two parts is generally 3mm to 5mm;

[0038] 2) Fix the clamp 4 on the pipeline 3, screw the third flange end face 311 of the pipeline 3 and the adapter 8, connect the adapter 8 and the screw 9, and fix the force sensor 5 and the thermocouple 7 on the screw 9 and the lower part of the pipeline 3 respectively;

[0039] 3) Place the assembly into the tool body 21, and then fix the flange cover 22 on the tool body 21. At this time, the fourth flange end face 312 of the pipeline 3, the thermocouple 7 and the clamp 4 are sealed in the tool body 21, and the third flange end face 311 of the pipeline 3 and the transfer tool 8 are outside the tool body 21 and above the flange cover 22;

[0040] 4) Connect the substrate 1 to the test platform of the test machine;

[0041] 5) Connect the upper end of the screw rod 9 to the testing machine through an adapter;

[0042] 6) placing a pair of heating devices 6 on both sides of the two parts of the tooling body 21;

[0043] 7) After the installation is completed as described above, conduct a test. Heat the pipe 3 and the clamp 4 through the heating device 6. After the temperature stabilizes, turn on the measurement system, start data acquisition, start the control system, and control the test machine to move at a certain speed. Wait for the pipe 3 and the clamp 4 to have a relative displacement. At this time, the friction force of the clamp 4 at high temperature can be measured.

[0044] Compared with the existing technology, the utility model has the following advantages: first, the tool body is designed to be divided into two parts, which is convenient for quickly replacing the clamp; second, according to the pipelines with different diameters, only the flange cover needs to be replaced, that is, the flange cover with circular holes of different sizes in the middle is replaced, so that the friction force test of different clamps can be carried out at high temperature.

[0045] The utility model has a scientific structural design, a simple structure and is easy to operate; the utility model can be suitable for clamps of different specifications according to pipelines of different diameters, thereby solving the problem that the existing test device does not have universality; the utility model can effectively carry out friction force tests under high temperatures, evaluate whether the friction force of the clamp under high temperature conditions meets the use requirements, and provide a basis for theoretical simulation calculations.

[0046] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only a preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A high temperature friction test device, characterized in that: The invention comprises a base plate (1), a test fixture (2), a pipeline (3) arranged in the test fixture (2), a clamp (4), a force sensor (5), a pair of heating devices (6) and a thermocouple (7). The test fixture (2) comprises a fixture body (21) and a flange cover (22). The fixture body (21) comprises a first arc plate (211) and a second arc plate (212) which are identical in shape and size and symmetrically arranged. The first arc plate (211) and the second arc plate (212) are cylindrical as a whole. The side walls of the first arc plate (211) and the second arc plate (212) are symmetrically provided with openings (213). The upper ends of the first arc plate (211) and the second arc plate (212) are respectively provided with a first flange end face (214) and a second flange end face (215). The flange cover (22) is an overall circular structure. A circular hole is provided in the middle of the flange cover (22). The flange cover (22) comprises a second arc plate (211) and a second arc plate (212) which are identical in shape and size and symmetrically arranged. A flange cover (221) and a second flange cover (222), wherein the first flange end face (214) and the second flange end face (215) are respectively connected to the first flange cover (221) and the second flange cover (222) by bolts, the upper end of a pipeline (3) arranged in the test fixture (2) passes through the test fixture (2) and extends out from a circular hole in the middle of the flange cover (22), the clamp (4) is clamped on the pipeline (3) in the test fixture (2), and the pipeline (3) The two ends extend outward to form a third flange end face (311) and a fourth flange end face (312), respectively; the upper end of the third flange end face (311) is connected to a transfer fixture (8); the middle part of the transfer fixture (8) is connected to the lower end of the screw rod (9); the heating device (6) comprises a rectangular shell (611) and a quartz lamp heating rod (612) installed on the inner surface of the rectangular shell (611); the pair of heating devices (6) are symmetrically arranged on both sides of the test fixture (2).

2. The high temperature friction test device according to claim 1, characterized in that: The first flange cover (221) and the second flange cover (222) are respectively provided with a first circular arc (223) and a second circular arc (224); the first circular arc (223) and the second circular arc (224) are symmetrically arranged, have the same shape and size, and are in a circular hole-shaped structure as a whole.

3. The high temperature friction test device according to claim 1, characterized in that: The lower ends of the first arc-shaped plate (211) and the second arc-shaped plate (212) extend outward to form a fifth flange end surface (216) and a sixth flange end surface (217), respectively; the fifth flange end surface (216) and the sixth flange end surface (217) are both connected to the base plate (1) by bolts.

4. The high temperature friction test device according to claim 1, characterized in that: The force sensor (5) is fixed on the screw rod (9), and the thermocouple (7) is fixed on the surface of the pipeline (3) in the test fixture (2).

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