Multifunctional multi-medium coupling field shaft-pad friction and wear testing machine

Abstract

The application discloses a multifunctional multi-medium coupling field shaft-pad friction and wear testing machine, which comprises a shaft sample and a plurality of pad samples in external contact with the shaft sample, each pad sample is connected with a loading mechanism and a friction force measuring mechanism, the shaft sample is connected with a reciprocating motion mechanism, and the shaft sample and the pad samples are placed in a heating mechanism. The shaft sample is connected with the reciprocating motion mechanism, a plurality of pad samples are arranged outside the shaft sample, the shaft sample reciprocates under the wrapping of the plurality of pad samples, shaft-pad friction and wear test is realized, the loading mechanism is connected with the pad sample, the pad sample is loaded, wear under stress conditions is simulated, the heating mechanism is arranged and the heating rod is arranged in the shaft sample, multifunctional multi-medium coupling field shaft-pad friction and wear test is realized, and the test requirements of the wear resistance of a neutron control rod in a nuclear reactor outside the reactor are met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of friction and wear test and nuclear power material application, and particularly relates to a multifunctional multi-medium coupling field shaft-bearing friction and wear testing machine. BACKGROUND

[0002] The up-and-down movement of the neutron control rod in the pressurized water reactor can scientifically and accurately control the neutron emission rate, and further control the power generation power to be adjusted according to the power consumption peak and valley. However, the service environment in the reactor is harsh (high temperature of about 350 DEG C, high pressure of about 15-18 MPa, high radioactivity, lithium borate liquid and the like), the service time of the control rod is long (about 40 years), and the up-and-down movement of the control rod is realized by the driving assembly and matched with the bearing material with wear resistance and wear reduction. The wear amount of the bearing of the control rod is extremely small under the long service life. This puts forward extremely high requirements on the surface friction and wear and wear resistance and wear reduction of the shaft-bearing system, and the rapid test of the actual size workpiece after surface treatment in the out-of-pile simulation in-pile environment is of great significance to the development of the shaft-bearing material system.

[0003] However, the existing friction and wear test equipment is mainly single function, and has strict requirements on the shape, size and size of the sample. The pin-on-disc, reciprocating and ring-block wear modes are all traditional wear test methods designed based on the local test of the plane sample, and cannot realize the change and setting of the solution, temperature, speed and pressure of the component. For the large-diameter service metal pipe and the corresponding bearing material, a targeted test device needs to be designed. All conditions except in-pile irradiation can be simulated: high-temperature water environment (80-95 DEG C), normal-temperature air environment, high-temperature air (or other atmosphere) environment, and even the environment of partial wear.

[0004] Therefore, a multifunctional multi-medium coupling field shaft-bearing friction and wear testing machine is needed. SUMMARY

[0005] The technical problem to be solved by the application is to provide a multifunctional multi-medium coupling field shaft-bearing friction and wear testing machine to solve the problems of the prior art. The testing machine is provided with a shaft sample and connected with a reciprocating mechanism, a plurality of bearing samples are arranged outside the shaft sample, the shaft sample reciprocates under the wrapping of the plurality of bearing samples, the shaft-bearing friction and wear test is realized, the bearing sample is loaded by the loading mechanism connected with the bearing sample, the wear under the stress condition is simulated, the heating mechanism is arranged, and the heating rod is arranged in the shaft sample, the multifunctional multi-medium coupling field shaft-bearing friction and wear test is realized, and the out-of-pile test demand of the wear resistance of the neutron control rod in the nuclear reactor is met.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: a multifunctional multi-medium coupled field shaft-pad friction and wear testing machine, characterized in that it comprises a shaft sample and a plurality of pad samples in external contact with the shaft sample, each of the pad samples is connected with a loading mechanism and a friction force measuring mechanism, the shaft sample is connected with a reciprocating motion mechanism, and the shaft sample and the pad samples are placed in a heating mechanism.

[0007] The above-mentioned multifunctional multi-medium coupled field shaft-pad friction and wear testing machine is characterized in that the number of the pad samples is 2-8.

[0008] The above-mentioned multifunctional multi-medium coupled field shaft-pad friction and wear testing machine is characterized in that the loading mechanism comprises a loading rod fixed on the pad sample, the loading rod is connected with a load assembly, the load assembly is a Z-shaped lever that rotates around a fulcrum, a weight is hung on the lever, or the load assembly is a torque machine, a load sensor is arranged on the loading rod, and the load applied by the load assembly to the pad sample is 20-150 N.

[0009] The above-mentioned multifunctional multi-medium coupled field shaft-pad friction and wear testing machine is characterized in that the friction force measuring mechanism comprises a linear bearing sleeved on the loading rod, and the linear bearing is connected with a friction force sensor.

[0010] The above-mentioned multifunctional multi-medium coupled field shaft-pad friction and wear testing machine is characterized in that the reciprocating motion mechanism comprises a motor that makes the shaft sample vertically reciprocate at a uniform or variable speed, the reciprocating speed of the shaft sample is 2-20 mm / s, and the stroke is 5-600 mm.

[0011] The above-mentioned multifunctional multi-medium coupled field shaft-pad friction and wear testing machine is characterized in that a heating rod is installed in the shaft sample and the shaft sample is filled with heating oil.

[0012] The above-mentioned multifunctional multi-medium coupled field shaft-pad friction and wear testing machine is characterized in that the heating mechanism is a container with a heater.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] 1. By arranging the shaft sample and connecting the reciprocating motion mechanism, a plurality of pad samples are arranged outside the shaft sample, the shaft sample reciprocates under the wrapping of the plurality of pad samples, the shaft-pad friction and wear test is realized, the pad sample is connected with the loading mechanism, the pad sample is loaded, the wear under the stress condition is simulated, the heating mechanism is arranged and the heating rod is installed in the shaft sample, the multifunctional multi-medium coupled field shaft-pad friction and wear test is realized, and the out-of-pile test demand of the wear resistance of the nuclear reactor control rod is met.

[0015] 2、The modular increase or decrease of the present application or the corresponding load friction sensor and so on, can test a variety of structure of shaft-pave combination, targeted to the actual shaft-pave combination of key wear and wear reduction components in the reactor for simulation of working condition bench test, in addition, can set up the mode of partial wear, study more close to the most serious partial wear phenomenon when working condition.

[0016] 3、The present application is provided with heating mechanism and heating rod installed in the shaft sample, and the parameters of heating are controlled, and the variable speed reciprocating motion is matched with the reciprocating mechanism, so as to realize the sliding distance-wear-friction coefficient curve of the typical sample under variable temperature and variable speed.

[0017] The technical solutions of the present application are described in further detail below by means of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structural schematic diagram of the multifunctional multi-medium coupling field shaft-pave friction and wear testing machine of the present application.

[0019] Figure 2 is the structural schematic diagram of the top of the multifunctional multi-medium coupling field shaft-pave friction and wear testing machine of the present application.

[0020] Explanation of reference signs:

[0021] 1-shaft sample; 2-pave sample; 3-loading rod; 4-support point; 5-Z-shaped lever; 6-weight; 7-linear bearing;

[0022] 8-friction force sensor; 9-motor; 10-heating rod; 11-container. DETAILED DESCRIPTION

[0023] Example 1

[0024] As shown in Figure 1 and Figure 2 , a multifunctional multi-medium coupling field shaft-pave friction and wear testing machine of the present application includes a shaft sample 1 and a plurality of pave samples 2 in contact with the outside of the shaft sample 1, each of the pave samples 2 is connected with a loading mechanism and a friction force measuring mechanism, the shaft sample 1 is connected with a reciprocating mechanism, and the shaft sample 1 and the pave sample 2 are placed in a heating mechanism.

[0025] It should be noted that by setting the shaft sample 1 and connecting the reciprocating mechanism, a plurality of tile samples 2 are arranged outside the shaft sample 1, so that the shaft sample 1 reciprocates under the wrapping of the plurality of tile samples 2, the shaft-tile friction and wear test is realized, the tile sample 2 is connected with the loading mechanism, the tile sample 2 is loaded, the wear under the stress condition is simulated, the heating mechanism is arranged to realize the shaft-tile friction and wear test in the multi-medium coupling field, the above-mentioned device is matched with the overall to realize the shaft-tile friction and wear test in the multi-functional multi-medium coupling field, and the out-of-pile test demand of the wear resistance of the neutron control rod in the nuclear reactor is met.

[0026] It should be noted that the shaft sample 1 is a stainless steel pipe with both ends welded.

[0027] It should be noted that in view of the out-of-pile test demand of the wear resistance of the neutron control rod in the nuclear reactor, the embodiment realizes the shaft-tile friction and wear test in the multi-functional multi-medium coupling field on a test machine, specifically including: 1, the heating mechanism does not heat, and reciprocating wear under atmospheric temperature is realized; 2, the heating mechanism adopts normal temperature water bath or heated water bath, and reciprocating wear under normal temperature water environment or high temperature water environment is realized; 3, the heating rod 10 in the shaft sample 1 is oil-bathed, and reciprocating wear in a high temperature air environment is realized; 4, the speed or frequency of the shaft sample 1 is controlled at a uniform speed or variable speed, and reciprocating wear under different speeds is realized, and the multi-temperature uniform speed, variable speed reciprocating wear is realized in cooperation with the different temperature conditions; 5, in the same environment, the temperature is gradually changed, and the sliding distance-wear amount-friction coefficient curve of the typical sample under different temperatures is obtained; 6, the uniform load is applied to each bearing, and the medium and temperature are controlled to simulate the ideal working condition; 7, the non-uniform load is applied to the bearing at different positions, and the medium and temperature are controlled to simulate the working condition of eccentric wear.

[0028] It should be noted that the friction force measuring mechanism, the reciprocating mechanism, the heating mechanism, the load sensor and the heating rod 10 are controlled by the computer, and the data acquisition system is arranged on the computer for calculating the friction coefficient and displaying the curve on the screen.

[0029] In the embodiment, the number of tile samples 2 is 2-8. The number of tile samples 2 is controlled to test a plurality of tile samples 2 at a time, and the test efficiency is improved.

[0030] In this embodiment, the loading mechanism includes a loading rod 3 fixed on the bearing shell sample 2, the loading rod 3 is connected with a load assembly, the load assembly is a Z-shaped lever 5 rotating around a fulcrum 4, a weight 6 is hung on the lever, or the load assembly is a torque machine, a load sensor is arranged on the loading rod 3, and the load applied by the load assembly on the bearing shell sample 2 is 20N-150N. By fixing the loading rod 3 on the bearing shell sample 2, the load assembly can apply different loads to the bearing shell sample 2, simulate the working condition of the bearing shell in the driving member in the reactor, and the load assembly has two forms, one is a Z-shaped lever 5 rotating around a fulcrum 4, which adopts the principle of lever to transmit the gravity of the weight 6 to the loading rod 3 to form a load, in order to reduce the weight of the hooking weight 6, a labor-saving lever can be selected, and the size of the load can be adjusted by adjusting the position of the weight 6, and the other is to directly apply a load to the loading rod 3 by using a torque machine; in addition, a load sensor is arranged on the loading rod 3, which is used for detecting the true value of the load applied by the load assembly, so that the size of the load can be adjusted and controlled.

[0031] It should be noted that the end of the loading rod 3 in contact with the load assembly is disc-shaped, which is convenient for receiving the load applied by the load assembly.

[0032] As shown in Figure 1 and Figure 2 In this embodiment, the friction force measuring mechanism includes a linear bearing 7 sleeved on the loading rod 3, and the linear bearing 7 is connected with a friction force sensor 8. The friction force during the friction process is measured by the friction force sensor 8, the friction force sensor 8 is connected with the linear bearing 7, the loading rod 3 passes through the linear bearing 7 and is rigidly connected with the bearing shell sample 2, when the shaft sample 1 reciprocates, the friction force between the shaft sample 1 and the bearing shell sample 2 is generated, the force is transmitted to the friction force sensor 8 through the loading rod 3 and the linear bearing 7, the friction force can be measured without affecting the loading, the range of the friction force sensor 8 is 20N-150N, the sensitivity is 0.1N-0.5N, and dynamic data of multiple groups of friction forces in reciprocating motion are collected.

[0033] As shown in Figure 1 and Figure 2 In this embodiment, the reciprocating motion mechanism includes a motor 9 for making the shaft sample 1 vertically reciprocate at a uniform speed or a variable speed, the reciprocating speed of the shaft sample 1 is 2mm / s-20mm / s, and the stroke is 5mm-600mm. The mechanism is mainly used to drive the shaft sample 1 to reciprocate, mainly to uniformly drive the vertical measured guide pipe up and down, and to reciprocate with the bearing shell sample 2, which can be driven by a linear servo motor 9, or a crank connecting rod structure can be selected to convert rotary motion into reciprocating motion, and the reciprocating frequency and stroke of the mechanism are adjusted within a certain range.

[0034] In this embodiment, a heating rod 10 is installed in the shaft sample 1 and filled with heating oil. By setting the heating rod 10 and heating oil to heat the shaft sample 1 in an oil bath, a reciprocating friction and wear test can be carried out in a high-temperature air environment. At the same time, heat insulation cotton is added to the container 11 to reduce temperature fluctuations. In actual use, the heating rod 10 can also be in direct contact with the shaft sample 1 to directly heat the shaft sample 1.

[0035] In this embodiment, the heating mechanism is a container 11 equipped with a heater. The container 11 with the heater can be a water bath or an oil bath. Water bath heating allows for reciprocating friction and wear tests in an aqueous environment. It can also be set to perform multi-stage programmable temperature heating and record the heating curve.

[0036] like Figure 1 and Figure 2 As shown, in actual use, six bearing samples 2 are set outside the shaft sample 1, and six sets of loading mechanisms and friction force measuring mechanisms are designed accordingly. Tests are conducted in the following ways: 1. The heating mechanism does not heat the shaft, achieving reciprocating wear at room temperature; 2. The heating mechanism uses a room temperature water bath or a heated water bath to achieve reciprocating wear in a room temperature water environment or a high temperature water environment; 3. The heating rod 10 in the shaft sample 1 is heated in an oil bath to achieve reciprocating wear in a high temperature air environment; 4. The movement speed or frequency of the shaft sample 1 is controlled uniformly or variablely to achieve reciprocating wear at different speeds, in conjunction with the above... Five, under different temperature conditions, achieve uniform and variable speed reciprocating wear at multiple temperatures; six, under the same environment, gradually change the temperature to obtain the sliding distance-wear amount-friction coefficient curves of typical samples at different temperatures; seven, apply uniform load to each bearing in an adjustable and controllable manner, and control the medium and temperature to simulate ideal working conditions; seven, apply non-uniform load to bearings at different locations in an adjustable and controllable manner, and control the medium and temperature to simulate uneven wear conditions, realize multi-functional multi-medium coupled field bearing-bearing friction and wear, obtain coupled field bearing-bearing friction and wear results, and meet the off-core testing requirements for the wear resistance performance of neutron control rods in nuclear reactors.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the inventive essence shall still fall within the protection scope of the present invention.

Claims

1. A multi-functional multi-medium coupled field axial-piston friction and wear testing machine, characterized in that, The application relates to a friction test device for testing the friction of a shaft sample (1) and a plurality of tile samples (2) in contact with the outer surface of the shaft sample (1), wherein each tile sample (2) is connected with a loading mechanism and a friction force measuring mechanism, the shaft sample (1) is connected with a reciprocating motion mechanism, and the shaft sample (1) and the tile sample (2) are placed in a heating mechanism; the loading mechanism comprises a loading rod (3) fixed on the tile sample (2), the loading rod (3) is connected with a load assembly, the load assembly is a Z-shaped lever (5) capable of rotating around a fulcrum (4), a weight (6) is hung on the lever, or the load assembly is a torque machine, a load sensor is arranged on the loading rod (3), and the load applied by the load assembly on the tile sample (2) is 20N-150N; the friction force measuring mechanism comprises a linear bearing (7) sleeved on the loading rod (3), and the linear bearing (7) is connected with a friction force sensor (8).

2. The multi-functional multi-medium coupled field rig for testing friction and wear according to claim 1, wherein, The number of the tile samples (2) is 2-8.

3. The multi-functional multi-medium coupled field rig for testing friction and wear according to claim 1, wherein, The reciprocating motion mechanism comprises a motor (9) for vertically driving the shaft sample (1) to perform uniform or variable speed reciprocating motion, the reciprocating motion speed of the shaft sample (1) is 2mm / s-20mm / s, and the stroke is 5mm-600mm.

4. The multi-functional multi-medium coupled field rig for testing friction and wear according to claim 1, wherein, The shaft sample (1) is provided with a heating rod (10) and is filled with heating oil.

5. The multi-functional multi-medium coupled field rig for testing friction and wear according to claim 1, wherein, The heating mechanism is a container (11) provided with a heater.

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