Friction-wear test system and friction-wear test method for simulating water flow environment

Abstract

The invention relates to a frictional wear test system and a frictional wear test method for simulating a water flow environment. The frictional wear test system comprises a worn test piece, a millstone, a test container, a liquid storage container, a first flow control valve, a water inlet control pump, a water outlet control pump, a second flow control valve, a flow meter and a PLC (Programmable Logic Controller), the test container is installed on a reciprocating friction-wear testing machine workbench, the millstone is fixed to the bottom of the test container, and a to-be-worn test piece is installed on the reciprocating friction-wear testing machine and makes contact with the millstone. The liquid storage container, the water inlet control pump, the first flow control valve, the test container, the water outlet control pump, the second flow control valve and the flow meter are sequentially connected to form a water circulation line, and the PLC is connected with the water outlet control pump, the water inlet control pump, the first flow control valve, the second flow control valve and the flow meter through data lines. The device can simulate different water flow environments to test the frictional wear condition of the worn test piece in a dynamic water flow environment, can be used in combination with different types of frictional wear testing machines, and is high in universality.

Description

Technical Field

[0001] The invention belongs to the technical field of friction and wear testing, and in particular relates to a friction and wear testing system and a friction and wear testing method for simulating a water flow environment. Background Art

[0002] Wear is an important cause of parts failure. With the continuous advancement of my country's large-scale infrastructure construction and infrastructure overseas strategy, ports, hydropower stations, water conservancy hubs and other projects across the country and even around the world are constantly under construction, and more and more infrastructure equipment and their parts need to work in water flow environments such as rivers and oceans for a long time. The friction and wear in the water flow environment is very different from that in the dry environment. For example, the speed of the water flow, the immersion depth of the parts in the water, the pH value of the liquid and the sediment content can have a great impact on the wear of the parts.

[0003] At present, most of the friction and wear devices that simulate liquid environments are static liquids, and the liquid flow rate and liquid level height cannot be adjusted, so they cannot accurately simulate different river and ocean environments. In addition, although the basic principles of different types of friction and wear testing machines at home and abroad are the same, the specific structures are still quite different. When conducting friction and wear experiments under special working conditions, it is necessary to purchase or customize the environmental devices separately, which increases the test cost. Therefore, it is very important to design a friction and wear test system that can simulate the water flow environment, control the liquid level and water flow rate, and can adjust liquid media with different pH values ​​and liquid media with different sediment contents, so as to accurately simulate different river or ocean environments and be suitable for different types of friction and wear testing machines. Summary of the invention

[0004] The purpose of the present invention is to provide a friction and wear test system and a friction and wear test method for simulating a water flow environment, which can simulate different water flow environments to test the friction and wear of a worn specimen in a dynamic water flow environment, and can be used in conjunction with friction and wear testing machines of different models, and has strong versatility.

[0005] The present invention is specifically implemented through the following technical solutions. According to a friction and wear test system for simulating a water flow environment proposed in the present invention, it includes a test piece to be ground, a grinding disc, a test container, a liquid storage container, a first flow control valve, a water inlet control pump, a water outlet control pump, a second flow control valve, a flow meter, and a PLC controller; the test container is installed on a workbench of a reciprocating friction and wear tester and can reciprocate with the workbench, the grinding disc is fixed to the bottom of the test container and can reciprocate with the test container; the test piece to be ground is installed on the reciprocating friction and wear tester and is arranged above the grinding disc and in contact with the grinding disc, a water inlet is arranged on one side of the test container, and a water inlet is arranged on the other side. A water outlet is provided on one side, the water inlet of the test container is connected to the first flow control valve, the first flow control valve is also connected to the water inlet control pump, and the water inlet control pump is also connected to the water outlet of the liquid storage container; the water outlet of the test container is connected to the water outlet control pump, the water outlet control pump is also connected to the second flow control valve, and the second flow control valve is also connected to the return water port of the liquid storage container; the flow meter is arranged between the liquid storage container and the water inlet control pump or between the liquid storage container and the second flow control valve; the PLC controller is connected to the first flow control valve, the water inlet control pump, the water outlet control pump, the second flow control valve, and the flow meter through a data line.

[0006] The aforementioned friction and wear test system for simulating water flow environment also includes a monitoring screen, which is connected to the PLC controller via a data line.

[0007] The friction and wear test system for simulating a water flow environment described above, wherein the water inlet control pump and the first flow control valve, the first flow control valve and the test container, the test container and the water outlet control pump, the water outlet control pump and the second flow control valve, the second flow control valve and the flow meter, the flow meter and the liquid storage container, and the liquid storage container and the water inlet control pump are all connected by bellows; Alternatively, the water inlet control pump and the first flow control valve, the first flow control valve and the test container, the test container and the water outlet control pump, the water outlet control pump and the second flow control valve, the second flow control valve and the liquid storage container, the liquid storage container and the flow meter, and the flow meter and the water inlet control pump are all connected through bellows.

[0008] In the aforementioned friction and wear test system simulating a water flow environment, the test container is made of metal and has a shape of at least one of a cylinder, a cube, a cuboid, and a polygon.

[0009] Furthermore, a transparent observation window is arranged on the side wall of the test container, scale lines are arranged next to the observation window, and the scale lines are arranged on the outer wall of the test container.

[0010] In the aforementioned friction and wear test system simulating a water flow environment, the test piece to be ground is cylindrical, with a diameter of 4 mm and a height of 18 mm; the grinding disc is disc-shaped, with a diameter of 30 mm and a thickness of 3 mm.

[0011] In the aforementioned friction and wear test system simulating a water flow environment, the material of the test piece to be worn is metal, ceramic, etc., and the metal includes but is not limited to steel.

[0012] The present invention also provides a friction and wear test method in a simulated water flow environment, which is performed using the friction and wear test system as described above and specifically includes the following steps: (1) The test piece to be ground is mounted on a reciprocating friction and wear testing machine and set above the grinding disc. The height of the test piece to be ground is adjusted so that its lower end is in close contact with the grinding disc. The wear pressure is adjusted by the reciprocating friction and wear testing machine. (2) Connect the pipelines and lines of the friction and wear test system, control the water inlet control pump and the first flow control valve to open through the PLC controller, and the water in the liquid storage container is pumped into the test container. The water inlet flow rate is controlled by the first flow control valve; (3) When the liquid level in the test container reaches the liquid level designed for the test, the PLC controller controls the water outlet control pump, the second flow control valve and the flow meter to open, so that the water in the test container enters the water storage container; the flow data on the flow meter is observed, and the opening of the first flow control valve and the second flow control valve is controlled to keep the liquid level in the test container at the liquid level designed for the test, and the water inlet flow rate and the water outlet flow rate are kept at the flow rates designed for the test, so as to simulate the water flow environment of the grinding specimen under a certain liquid level and a certain water flow rate; (4) Turn on the reciprocating friction and wear testing machine, the test container makes a reciprocating motion, and the grinding disc reciprocates with the test container to perform a friction and wear test on the ground specimen, and test the dynamic friction and wear of the ground specimen under the water flow environment set in the test.

[0013] The aforementioned friction and wear test method for simulating a water flow environment can simulate different water flow velocities and different liquid level heights in the test container by controlling the opening sizes of the first flow control valve and the second flow control valve, thereby simulating the water flow environment under different water flow velocities and liquid level heights.

[0014] The aforementioned friction and wear test method for simulating a water flow environment can simulate a water flow environment with different pH values ​​by adjusting the pH value of the water in the liquid storage container, and simulate a water flow environment with different conditions by adding sand to the water in the liquid storage solution.

[0015] Compared with the prior art, the present invention has obvious advantages and beneficial effects. By means of the above technical solution, the present invention can achieve considerable technical progress and practicality, and has a wide range of utilization value, and has at least the following advantages: The friction and wear test system for simulating a water flow environment provided by the present invention can simulate the friction and wear conditions of a ground specimen under different water flow velocities and different liquid level heights, and provides a reliable test system for testing the friction and wear conditions of the ground specimen in a dynamic water flow environment. And by adjusting the pH of the water in the liquid storage container, the dynamic friction and wear conditions of the ground specimen in a water flow environment with different pH values ​​can be simulated. By adding sand to the liquid storage container, a river or ocean environment with different sand contents and different sand particle sizes can be simulated, and a reliable test system and test method are provided for measuring the dynamic friction and wear conditions of the ground specimen in different water flow environments. The present invention has a reasonable design and is simple to operate. It can be used in conjunction with friction and wear testing machines of different models and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a friction and wear test system for simulating a water flow environment according to the present invention; Among them, 1. Grinded specimen; 2. Grinding disc; 3. Test container; 4. Liquid storage container; 5. First flow control valve; 6. Water inlet control pump; 7. Water outlet control pump; 8. Second flow control valve; 9. Flow meter; 10. PLC controller; 11. Monitoring screen; 12. Bellows; 13. Data cable. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides a friction and wear test system simulating a water flow environment. Figure 1As shown, it includes a grinding specimen 1, a grinding disc 2, a test container 3, a liquid storage container 4, a first flow control valve 5, a water inlet control pump 6, a water outlet control pump 7, a second flow control valve 8, a flow meter 9, a PLC controller 10, a monitoring screen 11, a bellows 12, a data line 13 and a reciprocating friction and wear tester (the reciprocating friction and wear tester is not shown in FIG1 ). The test container 3 is installed on the workbench of the reciprocating friction and wear tester and can reciprocate with the workbench, and the grinding disc 2 is fixed to the bottom of the test container 3 and can reciprocate with the test container 3. The grinding specimen 1 is columnar (preferably cylindrical) and is installed on the reciprocating friction and wear tester and arranged above the grinding disc 2. The test container 3 is provided with a water inlet on one side and a water outlet on the other side. The water inlet is connected to the first flow control valve 5, which is also connected to the water inlet control pump 6, which is also connected to the water outlet of the liquid storage container 4. The water outlet of the test container 3 is connected to the water outlet control pump 7, which is also connected to the second flow control valve 8, which is also connected to the return water port of the liquid storage container 4. The flow meter 9 is arranged between the liquid storage container 4 and the water inlet control pump 6 or between the liquid storage container 4 and the second flow control valve 8. Figure 1 In the example shown, the flow meter is arranged between the liquid storage container 4 and the second flow control valve 8. The PLC controller 10 is connected to the first flow control valve 5, the water inlet control pump 6, the water outlet control pump 7, the second flow control valve 8, the flow meter 9, and the monitoring screen 11 through data lines, and is used to control the opening and closing of the water inlet control pump and the water outlet control pump, and control the opening and closing of the first and second flow control valves and the flow meter. The PLC controller can be controlled through the monitoring screen to realize the regulation of the water inlet control pump, the water outlet control pump, the first flow control valve, the second flow control valve, and the flow meter.

[0021] The liquid storage container 4 is filled with test water, and the test water in the liquid storage container 4 is pumped into the test container 3 by the water inlet control pump 6, and the water inlet flow rate into the test container 3 is controlled by the first flow control valve. The water in the test container 3 is returned to the liquid storage container 4 by the water outlet control pump, and the water outlet flow rate is controlled by the second flow control valve, and the water flow rate of the system is monitored by the flow meter.

[0022] In one embodiment, the water inlet control pump and the first flow control valve, the first flow control valve and the test container, the test container and the water outlet control pump, the water outlet control pump and the second flow control valve, the second flow control valve and the flow meter, the flow meter and the liquid storage container, and the liquid storage container and the water inlet control pump are all connected by bellows to achieve water flow between the various components.

[0023] In another embodiment, the water inlet control pump and the first flow control valve, the first flow control valve and the test container, the test container and the water outlet control pump, the water outlet control pump and the second flow control valve, the second flow control valve and the liquid storage container, the liquid storage container and the flow meter, and the flow meter and the water inlet control pump are all connected by bellows to achieve water flow between the various components.

[0024] The test container 3 is made of metal and can be a cylinder, a cube, a cuboid, or a polygon. A transparent observation window is provided on the side wall of the test container 3, and scale lines are provided next to the observation window. The scale lines are provided on the outer wall of the test container 3, and the liquid level in the test container 3 can be conveniently observed through the observation window and the scale lines.

[0025] The above test system can simulate different water flow environments and test the friction and wear of the abraded specimens under different water flow environments. The test method for simulating the friction and wear of the abraded specimens under different water flow environments using the above test system includes the following steps: (1) The specimen to be ground is mounted on a reciprocating friction and wear testing machine and set above the grinding disc. The height of the specimen to be ground is adjusted so that its lower end is in close contact with the top of the grinding disc. The wear pressure is adjusted by the reciprocating friction and wear testing machine.

[0026] (2) According to Figure 1 In the system shown, after the pipelines and lines of various components are connected, the operation monitoring screen controls the water inlet control pump 6 and the first flow control valve 5 to open through the PLC controller, and the water in the liquid storage container 4 is pumped into the test container 3, and the water inlet flow is controlled by the first flow control valve.

[0027] (3) When the liquid level in the test container 3 reaches the liquid level designed for the test, the operating monitoring screen controls the water outlet control pump 7, the second flow control valve 8 and the flow meter 9 to open through the PLC controller, so that the water in the test container 3 circulates into the water storage container 4. Observe the flow data on the flow meter 9, and control the opening of the first flow control valve and the second flow control valve to keep the liquid level in the test container 3 at the liquid level designed for the test, and keep the water inflow and outflow at the flow rates designed for the test, so as to simulate the water flow environment of the grinding specimen under a certain liquid level and a certain water flow rate. The water flow rate can be observed through the monitoring screen or the flow meter on the flow meter, and the opening of the first flow control valve and the second flow control valve can be observed and adjusted through the monitoring screen.

[0028] (4) Turn on the reciprocating friction and wear testing machine, and the test container 3 makes a reciprocating motion. The grinding disc reciprocates with the test container 3 to perform a friction and wear test on the ground specimen, and the dynamic friction and wear of the ground specimen under the liquid level height and water flow rate set in the test is tested.

[0029] In the above test method for simulating the friction and wear of the ground specimen under different water flow environments, different water flow velocities and different liquid level heights in the test container can be simulated by controlling the opening size of the first flow control valve and the second flow control valve, thereby simulating the water flow environment under different water flow velocities and liquid level heights. It is also possible to simulate the water flow environment of different pH values ​​by adjusting the pH of the water in the liquid storage container according to the test requirements, and test the friction and wear of the ground specimen in a water environment of a certain pH value. It is also possible to add a certain amount of sand to the water in the liquid storage container to simulate the water flow environment of different sand contents, and test the friction and wear of the ground specimen in a water flow environment of a certain sand content. The particle size and amount of sand added are selected and designed according to the test requirements.

[0030] In one embodiment, the first flow control valve and the second flow control valve adopt the control valve model FRY-02TQ911F-16P-DN15 of Jiangsu Valve Ruiyi Valve Equipment Co., Ltd. The water inlet control pump and the water outlet control pump adopt the electric diaphragm pump model BS6500 of Shandong Zhongju Electric Co., Ltd. The flow meter adopts the electromagnetic flow meter model LDG-SUP-A100-DN15 of Hangzhou Meiyi Automation Co., Ltd. The PLC controller adopts the Siemens S7-200 controller. The monitoring screen adopts the intelligent Internet of Things touch screen model TPC1031Nt of Shenzhen Kunlun Ji Chuang Technology Development Co., Ltd. The reciprocating friction and wear tester can adopt the HSR-2M domestic reciprocating friction and wear tester, or the RTEC MFT5000 imported multifunctional high-temperature wear tester, but the above description is not regarded as a limitation of the present invention.

[0031] In an experimental embodiment, the specimen to be ground is cylindrical, with a diameter of 4 mm and a height of 18 mm; the grinding disc is disc-shaped, with a diameter of 30 mm and a thickness of 3 mm (including surface treatment), which is suitable for conducting friction and wear tests in a laboratory simulating a water flow environment, but this description is not regarded as a limitation of the present invention.

[0032] The material of the grinded specimen is metal, ceramic, etc. The metal includes but is not limited to steel.

[0033] The above is only an embodiment of the present invention, and does not limit the present invention in any form. The present invention can also have other forms of embodiments according to the above structures and functions, which are not listed one by one. Therefore, any simple modification, equivalent change and modification made by any technician familiar with the profession to the above embodiment according to the technical essence of the present invention without departing from the scope of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A friction and wear test system simulating a water flow environment, characterized in that The invention comprises a grinding specimen (1), a grinding disc (2), a test container (3), a liquid storage container (4), a first flow control valve (5), a water inlet control pump (6), a water outlet control pump (7), a second flow control valve (8), a flow meter (9), and a PLC controller (10); the test container (3) is mounted on a workbench of a reciprocating friction and wear tester and can reciprocate with the workbench; the grinding disc (2) is fixed to the bottom of the test container (3) and can reciprocate with the test container; the grinding specimen (1) is mounted on the reciprocating friction and wear tester and is arranged above the grinding disc (2) and in contact with the grinding disc; a water inlet is arranged on one side of the test container and a water outlet is arranged on the other side; the water inlet of the test container The test container is connected to the first flow control valve (5), the first flow control valve is also connected to the water inlet control pump (6), and the water inlet control pump is also connected to the water outlet of the liquid storage container (4); the water outlet of the test container is connected to the water outlet control pump (7), the water outlet control pump is also connected to the second flow control valve (8), and the second flow control valve is also connected to the water return port of the liquid storage container; the flow meter (9) is arranged between the liquid storage container and the water inlet control pump or between the liquid storage container and the second flow control valve; the PLC controller (10) is connected to the first flow control valve (5), the water inlet control pump (6), the water outlet control pump (7), the second flow control valve (8), and the flow meter (9) through data lines.

2. The friction and wear testing system for simulating water flow environment as claimed in claim 1, characterized in that It also includes a monitoring screen (11), which is connected to the PLC controller (10) via a data line.

3. The friction and wear testing system for simulating water flow environment as claimed in claim 1, characterized in that The water inlet control pump and the first flow control valve, the first flow control valve and the test container, the test container and the water outlet control pump, the water outlet control pump and the second flow control valve, the second flow control valve and the flow meter, the flow meter and the liquid storage container, and the liquid storage container and the water inlet control pump are all connected through bellows; Alternatively, the water inlet control pump and the first flow control valve, the first flow control valve and the test container, the test container and the water outlet control pump, the water outlet control pump and the second flow control valve, the second flow control valve and the liquid storage container, the liquid storage container and the flow meter, and the flow meter and the water inlet control pump are all connected through bellows.

4. The friction and wear testing system for simulating water flow environment as claimed in claim 1, characterized in that The test container is made of metal, and its shape is at least one of a cylinder, a cube, a cuboid, and a polygon.

5. The friction and wear test system for simulating water flow environment as claimed in claim 1 or 4, characterized in that A transparent observation window is arranged on the side wall of the test container, scale lines are arranged beside the observation window, and the scale lines are arranged on the outer wall of the test container.

6. The friction and wear testing system for simulating water flow environment as claimed in claim 1 or 4, characterized in that The specimen to be ground is cylindrical, with a diameter of 4 mm and a height of 18 mm; the grinding disc is disc-shaped, with a diameter of 30 mm and a thickness of 3 mm.

7. A friction and wear test method simulating a water flow environment, characterized in that The friction and wear test system according to claim 1 is used to carry out the test, which specifically includes the following steps: (1) Install the test piece on the reciprocating friction and wear tester and set it above the grinding disc. Adjust the height of the test piece so that its lower end is in close contact with the top of the grinding disc. Adjust the wear pressure through the reciprocating friction and wear tester. (2) Connect the pipelines and lines of the friction and wear test system, control the water inlet control pump and the first flow control valve to open through the PLC controller, and the water in the liquid storage container is pumped into the test container. The water inlet flow rate is controlled by the first flow control valve; (3) When the liquid level in the test container reaches the liquid level designed for the test, the PLC controller controls the water outlet control pump, the second flow control valve and the flow meter to open, so that the water in the test container enters the water storage container; the flow data on the flow meter is observed, and the opening of the first flow control valve and the second flow control valve is controlled to keep the liquid level in the test container at the liquid level designed for the test, and the water inlet flow rate and the water outlet flow rate are kept at the flow rates designed for the test, so as to simulate the water flow environment of the grinding specimen under a certain liquid level and a certain water flow rate; (4) Turn on the reciprocating friction and wear testing machine, the test container makes a reciprocating motion, and the grinding disc reciprocates with the test container to perform a friction and wear test on the ground specimen, and test the dynamic friction and wear of the ground specimen under the water flow environment set in the test.

8. The friction and wear test method in a simulated water flow environment as claimed in claim 7, characterized in that Different water flow velocities and different liquid level heights in the test container are simulated by controlling the opening sizes of the first flow control valve and the second flow control valve, thereby simulating the water flow environment under different water flow velocities and liquid level heights.

9. The friction and wear test method in a simulated water flow environment as claimed in claim 7, characterized in that The pH of the water in the storage container was adjusted to simulate water flow environments with different pH values, and water flow environments with different conditions were simulated by adding sand to the water in the storage solution.

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