Clamp device for simulating fretting wear of winding wire and pipe sample

Abstract

The invention discloses a clamp device for simulating fretting wear of a winding wire and a pipe sample, and belongs to the technical field of experimental equipment.The clamp device comprises a steel wire clamp and a tubular clamp, the tubular clamp is arranged on one side of the steel wire clamp, and the steel wire clamp comprises a steel wire sample base, a tangential connecting rod and a steel wire sample clamp; the tangential connecting rod and the steel wire sample clamp are fixedly connected with the steel wire sample base, the tubular clamp comprises a normal connecting rod and a tubular sample clamp, and the normal connecting rod is fixedly connected with the tubular sample clamp. By adopting the device, two samples are firmly fixed on the normal connecting rod through the steel wire sample clamp and the tubular sample clamp, the structure is simple and stable, the clamping force is strong, and tight clamping of the samples is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of experimental equipment, in particular to a fixture device for simulating the micro-motion wear of winding wire and tube samples. Background Art

[0002] Fretting wear based on the nuclear energy background mainly occurs in the reactor core structural components such as fuel cladding tubes and wire winding assemblies due to coolant flow, mechanical vibration and thermal expansion effects, thus affecting the safety of the reactor. Fretting wear experimental equipment is of great significance for simulating, evaluating and studying the wear resistance of materials. Among them, the fixture structure of the sample in the fretting wear experimental device has an impact on the experimental results to a certain extent. Most of the current fixtures are not firmly fixed, and the sample is easy to loosen during the experiment, causing the sample to move, so that the applied normal force cannot be carried out according to the expected contact point. In high temperature and high pressure environments, other fixtures are difficult to cope with due to mechanical structure reasons, and special mechanical structures are required. In addition, ordinary fixtures also have the problems of cumbersome disassembly and assembly and low installation accuracy requirements. When disassembling and assembling samples, complex structures require more precise alignment and fixation, which will consume a lot of time and energy, and will also cause the sample to be worn incorrectly during the installation process, affecting the experimental results. Summary of the invention

[0003] The purpose of the present invention is to provide a fixture device for simulating the micro-wear of wire windings and tube samples. Through a simple structure, it reduces friction caused by errors during installation, greatly stabilizes the frequency and force transmission of the loading unit to the sample, and allows better rigid contact between the tube sample and the fixture, so as to reduce experimental errors.

[0004] To achieve the above-mentioned purpose, the present invention provides a fixture device for simulating the micro-motion wear of wire winding and tube samples, including a steel wire fixture and a tubular fixture, wherein the tubular fixture is arranged on one side of the steel wire fixture, the steel wire fixture includes a steel wire sample base, a tangential connecting rod and a steel wire sample fixture, the tangential connecting rod and the steel wire sample fixture are both fixedly connected to the steel wire sample base, and the tubular fixture includes a normal connecting rod and a tubular sample fixture, and the normal connecting rod is fixedly connected to the tubular sample fixture.

[0005] Preferably, the tubular sample clamp comprises a symmetrically arranged upper tubular sample clamp and a lower tubular sample clamp, the inner sides of the upper tubular sample clamp and the lower tubular sample clamp are both provided with notches for the tubular sample, and the tubular sample clamp is arranged between the two notches.

[0006] Preferably, the tubular specimen is fixedly connected to the tubular specimen upper fixture and the tubular specimen lower fixture by means of tubular specimen screws.

[0007] Preferably, the normal connecting rod is fixedly connected to the tubular specimen upper fixture and the tubular specimen lower fixture via normal connecting rod screws.

[0008] Preferably, the steel wire sample fixture is T-shaped, and the transverse axis of the steel wire sample fixture passes through the steel wire sample base and is fixedly connected to the steel wire sample base by a compression top wire.

[0009] Preferably, the steel wire sample fixture is provided with steel wire sample through holes on both sides of the longitudinal axis, a steel wire sample groove is provided between the two steel wire sample through holes, and the steel wire sample groove and the two steel wire sample through holes are in a U-shape.

[0010] Preferably, steel wire sample clamping screws are provided on both sides of the longitudinal axis of the steel wire sample fixture.

[0011] Preferably, the steel wire sample base is in a clamp-like shape, and tangential clamp tightening screws are provided on both sides of the end of the steel wire sample base.

[0012] Preferably, the tangential pull rod is fixedly connected to the steel wire sample base via a tangential pull rod fixing screw, and the tangential pull rod and the tangential pull rod fixing screw are cross-shaped.

[0013] Therefore, the present invention adopts the above-mentioned fixture device for simulating the micro-motion wear of wire winding and tube samples, which has the following beneficial effects:

[0014] (1) The two specimens are firmly fixed on the normal connecting rod by the wire specimen clamp and the tubular specimen clamp. The structure is stable and the clamping force is strong, which ensures that the specimens are tightly clamped and remain stable when subjected to external forces or temperature changes;

[0015] (2) The structure is simple and easy to install and disassemble.

[0016] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an overall structural diagram of an embodiment of the present invention;

[0018] Figure 2 A structural diagram of a steel wire sample fixture according to an embodiment of the present invention;

[0019] Figure 3 This is a structural diagram of a tubular sample fixture according to an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of a fretting wear device according to an embodiment of the present invention;

[0021] Reference numerals

[0022] 1. Steel wire specimen base; 2. Tangential connecting rod; 3. Steel wire specimen fixture; 4. Pressing top wire; 5. Tangential fixture pressing screw; 6. Steel wire specimen perforation; 7. Steel wire specimen groove; 8. Steel wire specimen pressing screw; 9. Tangential tie rod fixing screw; 10. Steel wire specimen; 11. Tubular specimen upper fixture; 12. Tubular specimen lower fixture; 13. Notch;

[0023] 14. Tubular specimen; 15. Tubular specimen screw; 16. Normal connecting rod screw; 17. Normal connecting rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Example

[0026] Reference Figure 1-3 The present invention provides a fixture device for simulating the micro-wear of wire winding and tube samples, including a wire clamp and a tubular clamp, wherein the tubular clamp is arranged on one side of the wire clamp. Both the wire clamp and the tubular clamp are made of high-stability and high-pressure resistant materials, which are suitable for use in harsh environments such as high temperature and high pressure, and solve the problem of decreased holding force under complex working conditions.

[0027] The wire clamp includes a wire sample base 1, a tangential connecting rod 2 and a wire sample clamp 3. The tangential connecting rod 2 and the wire sample clamp 3 are both connected to the wire sample base 1. The wire sample base 1 is in a clamp-like shape. The tangential tie rod 2 is fixedly connected to the wire sample base 1 by a tangential tie rod fixing screw 9. Two groups of tangential tie rod fixing screws 9 are provided to keep the loading unit from actuating the wire sample base 1 more accurately without excessive deviation due to error displacement. After fixing, the tangential tie rod 2 and the tangential tie rod fixing screw 9 are in a cross shape. The wire sample clamp 3 is in a T-shape. The transverse axis of the wire sample clamp 3 passes through the wire sample base 1 and is fixedly connected to the wire sample base 1 by a compression top wire 4. In addition, tangential clamp compression screws 5 are provided on both sides of the end of the wire sample base 1 to compress the longitudinal axis of the wire sample clamp 3 so that the wire sample clamp 3 will not be misplaced or offset during the experiment.

[0028] On both sides of the longitudinal axis of the wire sample fixture 3, there are wire sample perforations 6. Between the two wire sample perforations 6, there is a wire sample groove 7. The wire sample groove 7 and the two wire sample perforations 6 are in a U shape. On both sides of the longitudinal axis of the wire sample fixture 3, there are wire sample compression screws 8. When conducting a fretting wear experiment, the wire sample is compressed through the wire sample compression screws 8 to ensure the stability of the wire sample. In addition, the wire sample perforations 6 on the wire sample fixture 3 can pass through different sample diameters, greatly improving the usability of the wire sample fixture 3.

[0029] The tubular fixture includes a normal connecting rod 17 and a tubular sample fixture. The normal connecting rod 17 is fixedly connected to the tubular sample fixture. The tubular sample fixture includes a symmetrically arranged upper tubular sample fixture 11 and a lower tubular sample fixture 12. On the inner sides of the upper tubular sample fixture 11 and the lower tubular sample fixture 12, there are notches 13 for the tubular sample 14. The tubular sample 14 is clamped between the two notches 13. The middle of the tubular sample 14 is penetrated by a tubular sample screw 15, and the tubular sample screw 15 fixes the tubular sample 14 on the tubular sample fixture. The normal connecting rod 17 is fixedly connected to the upper tubular sample fixture 11 and the lower tubular sample fixture 12 through a normal connecting rod screw 16, enabling better rigid contact between the normal connecting rod 17 and the tubular sample fixture. When conducting a fretting wear experiment, the upper and lower tubular sample fixtures can be adjusted, and different lengths of tubular sample screws 15 can be used to meet the experiments with different lengths of tubular samples; in addition, different sizes of upper and lower tubular sample fixtures can be replaced to meet tubular tests with different outer diameters and conduct tests on tubular samples with different outer diameters.

[0030] Working principle: Install the fixture device on the fretting wear sample device unit, as Figure 4 shown, Figure 4 which is a partial structural schematic diagram of the fretting wear sample device unit. The wire sample 10 is fixed by the wire sample fixture 3. The wire fixture is connected to the tangential loading unit through the tangential connecting rod 2. The tangential loading unit drives the tangential connecting rod 2 to enable the sample on the wire sample fixture 3 to achieve tangential slip. The tubular sample 14 is fixed by the tubular sample fixture. The tubular fixture is connected to the fretting wear sample device unit through the normal connecting rod 17. On the other side of the wire fixture, there is a normal loading unit. When conducting a fretting wear experiment, first adjust the tangential connecting rod 2 and the normal connecting rod 17 to make the wire sample 10 and the tubular sample 14 in contact. Then apply a constant normal load through the normal loading unit, and transmit the normal force through the connecting rod to make the wire sample 10 and the tubular sample 14 in close contact and bear the normal load, and then conduct experimental research on the fretting corrosion characteristics under different normal loads.

[0031] Therefore, the present invention adopts the above-mentioned fixture device for simulating the fretting wear of wire winding and tube samples, achieving stable and reliable fixation of the samples and being applicable to various complex working conditions.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A fixture device for simulating the micro-wear of wire winding and tube samples, characterized in that: It includes a steel wire clamp and a tubular clamp, wherein the tubular clamp is arranged on one side of the steel wire clamp, the steel wire clamp includes a steel wire sample base, a tangential connecting rod and a steel wire sample clamp, wherein the tangential connecting rod and the steel wire sample clamp are both fixedly connected to the steel wire sample base, and the tubular clamp includes a normal connecting rod and a tubular sample clamp, wherein the normal connecting rod is fixedly connected to the tubular sample clamp.

2. A fixture device for simulating fretting wear of wire winding and tube specimens according to claim 1, characterized in that: The tubular sample fixture comprises a symmetrically arranged tubular sample upper fixture and a tubular sample lower fixture, the inner sides of the tubular sample upper fixture and the tubular sample lower fixture are both provided with notches for the tubular sample, and the tubular sample fixture is arranged between the two notches.

3. A fixture device for simulating fretting wear of wire winding and tube specimens according to claim 2, characterized in that: The tubular specimen is fixedly connected to the tubular specimen upper fixture and the tubular specimen lower fixture via tubular specimen screws.

4. A fixture device for simulating fretting wear of wire winding and tube specimens according to claim 1, characterized in that: The normal connecting rod is fixedly connected to the upper fixture of the tubular specimen and the lower fixture of the tubular specimen through normal connecting rod screws.

5. A fixture device for simulating fretting wear of wire winding and tube specimens according to claim 1, characterized in that: The steel wire sample fixture is T-shaped, and the transverse axis of the steel wire sample fixture passes through the steel wire sample base and is fixedly connected to the steel wire sample base through a compression top wire.

6. A fixture device for simulating fretting wear of wire winding and tube specimens according to claim 5, characterized in that: The steel wire sample fixture is provided with steel wire sample through holes on both sides of the longitudinal axis, a steel wire sample groove is provided between the two steel wire sample through holes, and the steel wire sample groove and the two steel wire sample through holes are in a U shape.

7. A fixture device for simulating fretting wear of wire winding and tube specimens according to claim 5, characterized in that: Steel wire sample clamping screws are arranged on both sides of the longitudinal axis of the steel wire sample fixture.

8. A fixture device for simulating fretting wear of wire winding and tube specimens according to claim 1, characterized in that: The steel wire sample base is in a clamp-like shape, and tangential clamp tightening screws are arranged on both sides of the end of the steel wire sample base.

9. A fixture device for simulating fretting wear of wire winding and tube specimens according to claim 1, characterized in that: The tangential pull rod is fixedly connected to the steel wire sample base through a tangential pull rod fixing screw, and the tangential pull rod and the tangential pull rod fixing screw are cross-shaped.

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