Performance testing system and method for compression shear testing machine

Abstract

The present invention discloses a performance testing system and method for a compression shear testing machine, wherein the system includes an oil tank, a power mechanism, and a control mechanism, and the method includes a positioning step, a test condition I step, a test condition II step, and a test condition III step. The present invention relates to the technical field of compression shear testing, and specifically, to a performance testing system and method for a compression shear testing machine. The technical problem to be solved by the present invention is to provide a performance testing system and method for a compression shear testing machine, which controls the opening and closing of a first oil supply switching valve group and a second oil supply switching valve group, and obtains the output signal of a servo valve to control the rotation speed of a corresponding motor group to meet the oil supply requirements under different working conditions. While meeting the output force requirements of the compression shear testing machine, the control accuracy of the overflow volume can be further improved, so that the overflowing high-pressure oil is not easy to generate excess heat, and the probability of excessive oil temperature of the equipment is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of compression shear test, and in particular to a performance testing system and method for a compression shear testing machine. Background Art

[0002] The dynamic compression and shear testing machine is an experimental device used to test the compression and shear properties of materials under dynamic loads. It is often used to study the deformation, strength and failure mechanism of materials such as soil, rock, and seismic isolation rubber under dynamic loads. The compression and shear testing machine can simulate the behavior of materials under dynamic effects such as traffic loads, seismic waves, and wind in reality.

[0003] The compression shear testing machine is usually equipped with vertical loading and horizontal loading functions, which are powered by vertical cylinders and horizontal dynamic cylinders respectively. The hydraulic oil required for loading is provided by the oil source during the loading process.

[0004] In order to meet the output force requirements of the compression shear tester, a servo valve control system is usually used to drive each actuator to complete the detection task. The existing servo control oil source is usually a constant pressure oil source. In order to achieve a constant pressure effect, a certain amount of overflow is required to maintain the stability of the oil pressure.

[0005] With regard to the above technical solution, excessive overflow of high-pressure oil will generate excess heat, which can easily cause the equipment to overheat and waste energy. The equipment temperature will reach the upper limit in a short period of time, and then a high temperature alarm will be issued. More cooling equipment will be needed to suppress the increase in oil temperature. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a performance testing system and method for a compression shear testing machine, which can control the rotation speed of the corresponding motor group by obtaining the output signal of a specified servo valve, meet the oil supply demand under different working conditions, improve the control accuracy of the overflow flow, and effectively reduce the probability of excessive oil temperature of the equipment.

[0007] In the first aspect, the present invention provides a performance testing system for a compression shear testing machine, which adopts the following technical solutions to achieve the purpose of the invention:

[0008] A performance testing system for a compression shear testing machine, comprising an oil tank, a power mechanism, and a control mechanism, wherein the oil tank is used to supply oil to the power mechanism, the power mechanism is used to apply pressure to a test piece, and the control mechanism is used to adjust the oil supply of the power mechanism;

[0009] The power mechanism includes a vertical motor group, a horizontal motor group, a first servo valve, a second servo valve, a vertical hydraulic cylinder, a horizontal hydraulic cylinder, a first oil return pipeline, and a second oil return pipeline. The control mechanism includes a first signal processing module, a second signal processing module, a first speed control module, a second speed control module, and a working condition control module. The output end of the oil tank is respectively connected to the input end of the vertical motor group and the input end of the horizontal motor group. The output end of the vertical motor group is connected to the input end of the first servo valve, and the output end of the horizontal motor group is connected to the input end of the second servo valve. The output end of the first servo valve is connected to the input end of the vertical hydraulic cylinder, and the output end of the second servo valve is connected to the input end of the horizontal hydraulic cylinder. The vertical hydraulic cylinder output end is connected to the oil tank input end through the first oil return pipeline, the horizontal hydraulic cylinder output end is connected to the oil tank input end through the second oil return pipeline, the first signal processing module is electrically connected to the first servo valve, the second signal processing module is electrically connected to the second servo valve, the first signal processing module is electrically connected to the first speed regulating module, the second signal processing module is electrically connected to the second speed regulating module, the first speed regulating module is electrically connected to the vertical motor group, the second speed regulating module is electrically connected to the horizontal motor group, and the working condition control module is electrically connected to the first servo valve and the second servo valve respectively.

[0010] As a further limitation of the present technical solution, the control mechanism also includes a first oil supply switching valve group, the input end of the first oil supply switching valve group is connected to the output end of the vertical motor group, the output end of the first oil supply switching valve group is connected to the input end of the second servo valve, and the first signal processing module is electrically signal-connected to the second signal processing module.

[0011] As a further limitation of the present technical solution, the control mechanism also includes a second oil supply switching valve group, the input end of the second oil supply switching valve group is connected to the output end of the horizontal motor group, and the output end of the second oil supply switching valve group is connected to the input end of the second return oil pipeline.

[0012] As a further limitation of the present technical solution, the power mechanism also includes a cooling device, the input end of the cooling device is respectively connected to the output end of the first oil return pipeline and the output end of the second oil return pipeline, and the output end of the cooling device is connected to the input end of the oil tank.

[0013] In a second aspect, the present invention provides a performance testing method for a compression shear testing machine, which uses the performance testing system for a compression shear testing machine described in the first aspect and adopts the following technical solutions to achieve the purpose of the invention:

[0014] A performance test method for a compression shear testing machine, including a positioning step, a test condition I step, a test condition II step, and a test condition III step;

[0015] Positioning: Install the test piece to the specified position, the oil tank supplies oil to the vertical motor group and the horizontal motor group, the working condition control module adjusts the opening of the first servo valve and the second servo valve, the vertical motor group and the horizontal motor group run at idle speed, the vertical hydraulic cylinder output shaft and the horizontal hydraulic cylinder output shaft are loaded to the specified position, the test piece is positioned, the oil in the vertical hydraulic cylinder is output to the oil tank through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the oil tank through the second oil return pipeline;

[0016] Test condition I: The horizontal motor group maintains idling operation to fix the displacement of the horizontal hydraulic cylinder output shaft. The condition control module adjusts the opening of the first servo valve to make the vertical hydraulic cylinder output shaft vertically load the test piece, thereby completing the compression performance test;

[0017] The first signal processing module obtains the flow signal of the first servo valve and transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal;

[0018] Test condition II: The vertical motor group continues to operate, so that the output shaft of the vertical hydraulic cylinder maintains pressure on the test piece continuously. The condition control module adjusts the opening of the second servo valve, so that the output shaft of the horizontal hydraulic cylinder loads the test piece horizontally according to the sine wave, thereby completing the shear performance test;

[0019] The first signal processing module obtains the flow signal of the first servo valve, and transmits the signal to the first speed control module, the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal, the second signal processing module obtains the flow signal of the second servo valve, and transmits the signal to the second speed control module, the second speed control module transmits the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal;

[0020] Test condition III: The vertical motor group maintains idling operation, so that the vertical hydraulic cylinder output shaft continuously maintains pressure on the test piece. The condition control module adjusts the opening of the second servo valve so that the horizontal hydraulic cylinder output shaft loads the test piece horizontally at a uniform speed, thereby conducting an ultimate shear performance test.

[0021] The second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the second speed control module. The second speed control module transmits the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal.

[0022] As a further limitation of the present technical solution, in the positioning step, the oil in the vertical hydraulic cylinder is output to the cooling device through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the cooling device through the second oil return pipeline. The cooling device first cools the input oil and then outputs it to the oil tank.

[0023] In a third aspect, the present invention provides a performance testing method for a compression shear testing machine, which uses the performance testing system for a compression shear testing machine described in the first aspect and adopts the following technical solutions to achieve the purpose of the invention:

[0024] A performance test method for a compression shear testing machine, including a positioning step, a test condition I step, a test condition II step, and a test condition III step;

[0025] Positioning: Install the test piece to the specified position, the oil tank supplies oil to the vertical motor group and the horizontal motor group, the working condition control module adjusts the opening of the first servo valve and the second servo valve, the vertical motor group and the horizontal motor group run at idle speed, the vertical hydraulic cylinder output shaft and the horizontal hydraulic cylinder output shaft are loaded to the specified position, the test piece is positioned, the oil in the vertical hydraulic cylinder is output to the oil tank through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the oil tank through the second oil return pipeline;

[0026] Test condition I: The horizontal motor group maintains idling operation to fix the displacement of the horizontal hydraulic cylinder output shaft. The condition control module adjusts the opening of the first servo valve to make the vertical hydraulic cylinder output shaft vertically load the test piece, thereby completing the compression performance test;

[0027] The first signal processing module obtains the flow signal of the first servo valve and transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal;

[0028] Test condition II: The vertical motor group continues to operate, so that the output shaft of the vertical hydraulic cylinder maintains pressure on the test piece continuously. The condition control module adjusts the opening of the second servo valve, so that the output shaft of the horizontal hydraulic cylinder loads the test piece horizontally according to the sine wave, thereby completing the shear performance test;

[0029] The first signal processing module obtains the flow signal of the first servo valve, and transmits the signal to the first speed control module, the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal, the second signal processing module obtains the flow signal of the second servo valve, and transmits the signal to the second speed control module, the second speed control module transmits the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal;

[0030] Test condition III: The horizontal motor group maintains idling operation and supplies oil to the horizontal cylinder. The condition control module adjusts the opening of the first servo valve and the second servo valve, opens the first oil supply switching valve group, and enables the vertical motor group to supply oil to the vertical cylinder. At the same time, the first oil supply switching valve group supplies oil to the horizontal cylinder. The vertical hydraulic cylinder output shaft continuously maintains pressure on the specimen, and the horizontal hydraulic cylinder output shaft performs uniform horizontal loading on the specimen, thereby conducting an ultimate shear performance test.

[0031] The first signal processing module obtains the flow signal of the first servo valve, the second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the first signal processing module, the first signal processing module transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal.

[0032] In a fourth aspect, the present invention provides a performance testing method for a compression shear testing machine, which uses the performance testing system for a compression shear testing machine described in the first aspect and adopts the following technical solutions to achieve the purpose of the invention:

[0033] A performance test method for a compression shear testing machine, including a positioning step, a test condition I step, a test condition II step, and a test condition III step;

[0034] Positioning: Install the test piece to the specified position, the oil tank supplies oil to the vertical motor group and the horizontal motor group, the working condition control module adjusts the opening of the first servo valve and the second servo valve, the vertical motor group and the horizontal motor group run at idle speed, the vertical hydraulic cylinder output shaft and the horizontal hydraulic cylinder output shaft are loaded to the specified position, the test piece is positioned, the oil in the vertical hydraulic cylinder is output to the oil tank through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the oil tank through the second oil return pipeline;

[0035] Test condition I: The horizontal motor group maintains idling operation to fix the displacement of the horizontal hydraulic cylinder output shaft. The condition control module adjusts the opening of the first servo valve to make the vertical hydraulic cylinder output shaft vertically load the test piece, thereby completing the compression performance test;

[0036] The first signal processing module obtains the flow signal of the first servo valve and transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal;

[0037] Test condition II: The vertical motor group continues to operate, so that the output shaft of the vertical hydraulic cylinder maintains pressure on the test piece continuously. The condition control module adjusts the opening of the second servo valve, so that the output shaft of the horizontal hydraulic cylinder loads the test piece horizontally according to the sine wave, thereby completing the shear performance test;

[0038] The first signal processing module obtains the flow signal of the first servo valve, and transmits the signal to the first speed control module, the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal, the second signal processing module obtains the flow signal of the second servo valve, and transmits the signal to the second speed control module, the second speed control module transmits the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal;

[0039] Test condition III: The horizontal motor group maintains idling operation and stops supplying oil to the horizontal cylinder. The second oil supply switching valve group is opened, so that the horizontal motor group supplies oil to the second oil return pipeline through the second oil supply switching valve group. The working condition control module adjusts the opening of the first servo valve and the second servo valve, opens the first oil supply switching valve group, so that the vertical motor group supplies oil to the vertical cylinder, and at the same time supplies oil to the horizontal cylinder through the first oil supply switching valve group. The output shaft of the vertical hydraulic cylinder continuously maintains pressure on the specimen, so that the output shaft of the horizontal hydraulic cylinder loads the specimen horizontally at a uniform speed, thereby conducting an ultimate shear performance test;

[0040] The first signal processing module obtains the flow signal of the first servo valve, the second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the first signal processing module, the first signal processing module transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal.

[0041] Compared with the prior art, the advantages and positive effects of the present invention are:

[0042] 1. When running the specified test conditions, the speed of the corresponding motor group is controlled by the output signal of the servo valve to meet the oil supply requirements under different working conditions, so that the speed of the corresponding motor group changes with the change of the flow signal, and the pressure on the test piece also changes with the size of the cylinder output pressure. Such a setting can improve the control accuracy of the overflow while meeting the output force requirements of the compression and shear testing machine, so that the overflowing high-pressure oil is not easy to generate excess heat, effectively reducing the probability of excessive oil temperature of the equipment and energy waste. The equipment temperature is not easy to reach the upper limit in a short time and then issue a high temperature alarm. No cooling equipment is required or only a small amount of cooling equipment is required to meet the cooling requirements, suppress the increase in oil temperature, and reduce maintenance costs.

[0043] 2. Through the setting of the cooling device, the oil in the vertical hydraulic cylinder is output to the cooling device through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the cooling device through the second oil return pipeline. The cooling device first cools the input oil and then outputs it to the oil tank, thereby reducing the probability of a large amount of returned oil causing the oil temperature in the oil tank to be too high, reducing the probability of risks, and reducing maintenance costs.

[0044] 3. By controlling the opening and closing of the first oil supply switching valve group, the vertical motor group supplies oil to the vertical hydraulic cylinder and the horizontal hydraulic cylinder according to the specified test conditions, and the horizontal motor group supplies oil to the horizontal hydraulic cylinder at the same time. While meeting the output force requirements of the compression and shear testing machine, the overflow volume of the vertical oil cylinder can be reduced to a certain extent, and the overflow volume of the horizontal oil cylinder can be maintained within a certain range. While meeting the output force requirements of the compression and shear testing machine, the control accuracy of the overflow volume can be improved, so that the overflowing high-pressure oil is not easy to generate excess heat, effectively reducing the probability of excessive oil temperature of the equipment.

[0045] 4. By controlling the opening and closing of the first oil supply switching valve group and the second oil supply switching valve group, the vertical motor group supplies oil to the vertical hydraulic cylinder and the horizontal hydraulic cylinder according to the specified test conditions, and the horizontal motor group stops supplying oil to the horizontal hydraulic cylinder and returns the oil to the oil tank. While meeting the output force requirement of the compression and shear testing machine, the overflow volume of the vertical oil cylinder can be further reduced, and the overflow volume of the horizontal oil cylinder can be maintained within a lower range, thereby improving the control accuracy of the overflow volume, making it difficult for the overflowing high-pressure oil to generate excess heat, and effectively reducing the probability of excessive oil temperature of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0047] Figure 1 This is a system diagram of Embodiment 1 of the present invention;

[0048] Figure 2 This is a flow chart of Embodiment 2 of the present invention;

[0049] Figure 3 This is a flowchart of Embodiment 3 of the present invention;

[0050] Figure 4 This is a flow chart of Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0051] The following will be combined with the attached embodiment of the present invention Figure 1-Figure 4 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0052] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0053] When a component is referred to as being “located” or “disposed on” another component, it may be on the other component or there may be an intervening component. When a component is referred to as being “connected to” another component, it may be directly connected to the other component or there may be an intervening component.

[0054] Embodiment 1: A performance testing system for a compression shear testing machine comprises an oil tank, a power mechanism, and a control mechanism, wherein the oil tank is used to supply oil to the power mechanism, the power mechanism is used to load pressure on a test piece, and the control mechanism is used to adjust the oil supply of the power mechanism.

[0055] The power mechanism includes a vertical motor group, a horizontal motor group, a first servo valve, a second servo valve, a vertical hydraulic cylinder, a horizontal hydraulic cylinder, a first oil return pipeline, a second oil return pipeline, and a cooling device. The output end of the oil tank is respectively connected to the input end of the vertical motor group and the input end of the horizontal motor group. The output end of the vertical motor group is connected to the input end of the first servo valve, and the output end of the horizontal motor group is connected to the input end of the second servo valve. The output end of the first servo valve is connected to the input end of the vertical hydraulic cylinder, and the output end of the second servo valve is connected to the input end of the horizontal hydraulic cylinder. The output end of the vertical hydraulic cylinder is connected to the input end of the first oil return pipeline, and the output end of the horizontal hydraulic cylinder is connected to the input end of the second oil return pipeline. The input end of the cooling device is respectively connected to the output end of the first oil return pipeline and the output end of the second oil return pipeline, and the output end of the cooling device is connected to the input end of the oil tank.

[0056] The control mechanism includes a first signal processing module, a second signal processing module, a first speed control module, a second speed control module, a working condition control module, a first oil supply switching valve group, and a second oil supply switching valve group. The first signal processing module is electrically connected to the first servo valve, the second signal processing module is electrically connected to the second servo valve, the first signal processing module is electrically connected to the first speed regulating module, the second signal processing module is electrically connected to the second speed regulating module, the first signal processing module is electrically connected to the second signal processing module, the first speed regulating module is electrically connected to the vertical motor group, the second speed regulating module is electrically connected to the horizontal motor group, the working condition control module is electrically connected to the first servo valve and the second servo valve respectively, the input end of the first oil supply switching valve group is connected to the output end of the vertical motor group, the output end of the first oil supply switching valve group is connected to the input end of the second servo valve, the input end of the second oil supply switching valve group is connected to the output end of the horizontal motor group, and the output end of the second oil supply switching valve group is connected to the input end of the second return oil pipeline.

[0057] The working principle of this embodiment is:

[0058] After the test piece is installed at the specified position, the oil tank supplies oil to the vertical motor group and the horizontal motor group. The vertical motor group supplies oil to the vertical cylinder through the first servo valve, and the horizontal motor group supplies oil to the horizontal cylinder through the second servo valve. The operating condition control module adjusts the opening of the first servo valve and the second servo valve according to the specified operating conditions, so that the vertical hydraulic cylinder output shaft and the horizontal hydraulic cylinder output shaft are loaded to the specified position, and the test piece is positioned, maintained or loaded with pressure to complete the specified performance test. The oil in the vertical hydraulic cylinder is output to the cooling device through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the cooling device through the second oil return pipeline. The cooling device first cools the input oil and then outputs it to the oil tank.

[0059] When running the specified test conditions, the first signal processing module obtains the flow signal of the first servo valve and transmits the signal to the first speed control module. The first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal. The second signal processing module obtains the flow signal of the second servo valve, and transmits the signal to the second speed control module or the first signal processing module. The second speed control module transmits the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal. By controlling the opening and closing of the first oil supply switching valve group and the second oil supply switching valve group, the vertical motor group supplies oil to the vertical hydraulic cylinder and the horizontal hydraulic cylinder according to the specified test conditions, and the horizontal motor group suspends oil supply to the horizontal hydraulic cylinder and returns the oil to the cooling device.

[0060] Such a setting can control the rotation speed of the corresponding motor group by obtaining the output signal of the specified servo valve while meeting the output force demand of the compression and shear testing machine, thereby meeting the oil supply demand under different working conditions, improving the control accuracy of the overflow volume, and making it difficult for the overflowing high-pressure oil to generate excess heat, effectively reducing the probability of excessive oil temperature of the equipment and energy waste. The equipment temperature is not likely to reach the upper limit in a short time and then issue a high temperature alarm. There is no need to equip more cooling equipment to suppress the increase in oil temperature, thereby reducing production costs and maintenance costs.

[0061] Embodiment 2: Based on the performance testing system for a compression shear testing machine provided in the first embodiment of the present application, the second embodiment of the present application proposes a performance testing method for a compression shear testing machine, including positioning step S1, test condition I step S2, test condition II step S3, and test condition III step S4.

[0062] S1. Positioning: Install the test piece to the specified position, the oil tank supplies oil to the vertical motor group and the horizontal motor group, the working condition control module adjusts the opening of the first servo valve and the second servo valve, the vertical motor group and the horizontal motor group run at idle speed, the vertical hydraulic cylinder output shaft and the horizontal hydraulic cylinder output shaft are loaded to the specified position, the test piece is positioned, the oil in the vertical hydraulic cylinder is output to the cooling device through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the cooling device through the second oil return pipeline. The cooling device first cools the input oil and then outputs it to the oil tank.

[0063] S2, test condition I: the horizontal motor group maintains idling operation, so that the displacement of the horizontal hydraulic cylinder output shaft is fixed, and the condition control module adjusts the opening of the first servo valve so that the vertical hydraulic cylinder output shaft vertically loads the test piece, thereby completing the compression performance test;

[0064] The first signal processing module obtains the flow signal of the first servo valve and transmits the signal to the first speed control module. The first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal.

[0065] S3, test condition II: the vertical motor group continues to operate, so that the output shaft of the vertical hydraulic cylinder maintains pressure on the test piece continuously, and the condition control module adjusts the opening of the second servo valve so that the output shaft of the horizontal hydraulic cylinder loads the test piece horizontally according to the sine wave, thereby completing the shear performance test;

[0066] The first signal processing module obtains the flow signal of the first servo valve and transmits the signal to the first speed control module. The first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal. The second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the second speed control module. The second speed control module transmits the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal.

[0067] S4, test condition III: the vertical motor group maintains idling operation, so that the vertical hydraulic cylinder output shaft continuously maintains pressure on the test piece, and the condition control module adjusts the opening of the second servo valve so that the horizontal hydraulic cylinder output shaft performs uniform horizontal loading on the test piece, thereby conducting an ultimate shear performance test;

[0068] The second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the second speed control module. The second speed control module transmits the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal.

[0069] The working principle of this embodiment is:

[0070] After the test piece is installed at the specified position, the oil tank supplies oil to the vertical motor group and the horizontal motor group. The vertical motor group supplies oil to the vertical cylinder through the first servo valve, and the horizontal motor group supplies oil to the horizontal cylinder through the second servo valve. The operating condition control module adjusts the opening of the first servo valve and the second servo valve according to the specified operating conditions, so that the vertical hydraulic cylinder output shaft and the horizontal hydraulic cylinder output shaft are loaded to the specified position, and the test piece is positioned, maintained or loaded with pressure to complete the specified performance test. The oil in the vertical hydraulic cylinder is output to the cooling device through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the cooling device through the second oil return pipeline. The cooling device first cools the input oil and then outputs it to the oil tank.

[0071] When running the specified test conditions, the first signal processing module obtains the flow signal of the first servo valve and passes the signal to the first speed control module. The first speed control module passes the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal. The second signal processing module obtains the flow signal of the second servo valve and passes the signal to the second speed control module or the first signal processing module. The second speed control module passes the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal.

[0072] When operating the test condition I, the horizontal motor group provides a lower system pressure to fix the displacement of the horizontal hydraulic cylinder output shaft, and only the first servo valve is adjusted, and the vertical hydraulic cylinder output shaft vertically loads the test piece, thereby completing the compression performance test, and the speed of the vertical motor group changes with the change of the flow signal;

[0073] When running the test condition II, the vertical hydraulic cylinder output shaft continuously maintains pressure on the specimen, and only the second servo valve is adjusted. The horizontal hydraulic cylinder output shaft loads the specimen horizontally according to the sine wave, thereby completing the shear performance test. The speed of the horizontal motor group changes with the change of the flow signal, and the speed of the vertical motor group changes with the change of the flow signal;

[0074] When operating under test condition III, the vertical hydraulic cylinder output shaft continuously maintains pressure on the specimen, and only the second servo valve is adjusted. The horizontal hydraulic cylinder output shaft performs uniform horizontal loading on the specimen, thereby completing the ultimate shear performance test. The speed of the horizontal motor group changes with the change of the flow signal.

[0075] Such a setting can meet the output force requirement of the compression and shear testing machine while controlling the speed of the corresponding motor group by obtaining the output signal of the specified servo valve to meet the oil supply demand under different working conditions, improve the control accuracy of the overflow volume, and make it difficult for the overflowing high-pressure oil to generate excess heat, effectively reduce the probability of excessive oil temperature of the equipment and energy waste, and the equipment temperature is not likely to reach the upper limit in a short time and then issue a high temperature alarm. There is no need to equip more cooling equipment to suppress the increase in oil temperature, thereby reducing production costs and maintenance costs.

[0076] Embodiment 3: Based on the performance testing system for a compression shear testing machine provided in the first embodiment of the present application, the third embodiment of the present application proposes a performance testing method for a compression shear testing machine, including a positioning step S1, a test condition I step S2, a test condition II step S3, and a test condition III step S4. The difference between the third embodiment and the second embodiment is that the test condition III step S4 is updated as follows:

[0077] S4, test condition III: the horizontal motor group maintains idling operation and supplies oil to the horizontal cylinder. The working condition control module adjusts the opening of the first servo valve and the second servo valve, opens the first oil supply switching valve group, and enables the vertical motor group to supply oil to the vertical cylinder, and at the same time supplies oil to the horizontal cylinder through the first oil supply switching valve group. The vertical hydraulic cylinder output shaft continuously maintains pressure on the specimen, and the horizontal hydraulic cylinder output shaft performs uniform horizontal loading on the specimen, thereby conducting an ultimate shear performance test;

[0078] The first signal processing module obtains the flow signal of the first servo valve, the second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the first signal processing module, the first signal processing module transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal.

[0079] The working principle of this embodiment is:

[0080] When operating under test condition III, the horizontal motor group maintains idling operation, adjusts the first servo valve and the second servo valve, and the vertical hydraulic cylinder output shaft continuously maintains pressure on the specimen. The horizontal hydraulic cylinder output shaft loads the specimen horizontally at a uniform speed, thereby completing the ultimate shear performance test. The speed of the vertical motor group changes with the change of the flow signal.

[0081] With such arrangement, when operating test condition III, by controlling the opening and closing of the first oil supply switching valve group, the vertical motor group supplies oil to the vertical hydraulic cylinder and the horizontal hydraulic cylinder at the same time according to the specified test condition, and the horizontal motor group supplies oil to the horizontal hydraulic cylinder at the same time. This can reduce the overflow of the vertical cylinder to a certain extent while meeting the output force requirement of the compression and shear testing machine, and maintain the overflow of the horizontal cylinder within a certain range, further improving the control accuracy of the overflow, making it difficult for the overflowing high-pressure oil to generate excess heat, effectively reducing the probability of excessive oil temperature of the equipment, and reducing energy waste and maintenance costs.

[0082] Embodiment 4: Based on the performance testing system for a compression shear testing machine provided in the first embodiment of the present application, the fourth embodiment of the present application proposes a performance testing method for a compression shear testing machine, including a positioning step S1, a test condition I step S2, a test condition II step S3, and a test condition III step S4. The difference between the fourth embodiment and the second embodiment is that the test condition III step S4 is updated as follows:

[0083] S4, test condition III: the horizontal motor group maintains idling operation, and stops supplying oil to the horizontal cylinder. The second oil supply switching valve group is opened, so that the horizontal motor group supplies oil to the second oil return pipeline through the second oil supply switching valve group. The working condition control module adjusts the opening of the first servo valve and the second servo valve, opens the first oil supply switching valve group, so that the vertical motor group supplies oil to the vertical cylinder, and at the same time supplies oil to the horizontal cylinder through the first oil supply switching valve group. The output shaft of the vertical hydraulic cylinder continuously maintains pressure on the specimen, so that the output shaft of the horizontal hydraulic cylinder performs uniform horizontal loading on the specimen, thereby conducting an ultimate shear performance test;

[0084] The first signal processing module obtains the flow signal of the first servo valve, the second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the first signal processing module, the first signal processing module transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal.

[0085] The working principle of this embodiment is:

[0086] When operating under test condition III, the horizontal motor group stops supplying oil to the horizontal hydraulic cylinder, and the vertical motor group supplies oil to the vertical cylinder and the horizontal cylinder at the same time. The first servo valve and the second servo valve are adjusted, and the vertical hydraulic cylinder output shaft continuously maintains pressure on the specimen, and the horizontal hydraulic cylinder output shaft performs uniform horizontal loading on the specimen, thereby completing the ultimate shear performance test. The rotation speed of the vertical motor group changes with the change of the flow signal.

[0087] With such arrangement, when operating test condition III, by controlling the opening and closing of the first oil supply switching valve group and the second oil supply switching valve group, the vertical motor group supplies oil to the vertical hydraulic cylinder and the horizontal hydraulic cylinder according to the specified test condition, and the horizontal motor group suspends the oil supply to the horizontal hydraulic cylinder and returns the oil to the oil tank. This can further reduce the overflow of the vertical cylinder while meeting the output force requirement of the compression and shear testing machine, and maintain the overflow of the horizontal cylinder within a certain range. The output signal of the servo valve is used to control the speed of the servo motor to meet the oil supply demand under different working conditions, further improving the control accuracy of the overflow, making it difficult for the overflowing high-pressure oil to generate excess heat, effectively reducing the probability of excessive oil temperature of the equipment, and making it difficult for the equipment temperature to reach the upper limit in a short time and then issue a high temperature alarm, thereby reducing energy waste and maintenance costs.

[0088] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A performance test system for a compression shear test machine, characterized in that: It includes an oil tank, a power mechanism, and a control mechanism, wherein the oil tank is used to supply oil to the power mechanism, the power mechanism is used to apply pressure to the test piece, and the control mechanism is used to adjust the oil supply of the power mechanism; The power mechanism includes a vertical motor group, a horizontal motor group, a first servo valve, a second servo valve, a vertical hydraulic cylinder, a horizontal hydraulic cylinder, a first oil return pipeline, and a second oil return pipeline. The control mechanism includes a first signal processing module, a second signal processing module, a first speed control module, a second speed control module, and a working condition control module. The output end of the oil tank is respectively connected to the input end of the vertical motor group and the input end of the horizontal motor group. The output end of the vertical motor group is connected to the input end of the first servo valve, and the output end of the horizontal motor group is connected to the input end of the second servo valve. The output end of the first servo valve is connected to the input end of the vertical hydraulic cylinder, and the output end of the second servo valve is connected to the input end of the horizontal hydraulic cylinder. The output end of the vertical hydraulic cylinder is connected to the input end of the oil tank through the first oil return pipeline, the output end of the horizontal hydraulic cylinder is connected to the input end of the oil tank through the second oil return pipeline, the first signal processing module is connected to the first servo valve by electrical signals, the second signal processing module is connected to the second servo valve by electrical signals, the first signal processing module is connected to the first speed regulating module by electrical signals, the second signal processing module is connected to the second speed regulating module by electrical signals, the first speed regulating module is connected to the vertical motor group by electrical signals, the second speed regulating module is connected to the horizontal motor group by electrical signals, and the working condition control module is connected to the first servo valve and the second servo valve by electrical signals respectively; The control mechanism also includes a first oil supply switching valve group, the input end of the first oil supply switching valve group is connected to the output end of the vertical motor group, the output end of the first oil supply switching valve group is connected to the input end of the second servo valve, and the first signal processing module is electrically connected to the second signal processing module.

2. The performance testing system for a compression shear testing machine according to claim 1, characterized in that: The control mechanism also includes a second oil supply switching valve group, the input end of the second oil supply switching valve group is connected to the output end of the horizontal motor group, and the output end of the second oil supply switching valve group is connected to the input end of the second oil return pipeline.

3. The performance testing system for a compression shear testing machine according to any one of claims 1 to 2, characterized in that: The power mechanism also includes a cooling device, the input end of the cooling device is connected to the output end of the first oil return pipeline and the output end of the second oil return pipeline respectively, and the output end of the cooling device is connected to the input end of the oil tank.

4. A performance testing method for a compression shear testing machine, using a performance testing system for a compression shear testing machine as claimed in any one of claims 1 to 3, characterized in that: It includes positioning step, test condition I step, test condition II step and test condition III step; Positioning: Install the test piece to the specified position, the oil tank supplies oil to the vertical motor group and the horizontal motor group, the working condition control module adjusts the opening of the first servo valve and the second servo valve, the vertical motor group and the horizontal motor group run at idle speed, the vertical hydraulic cylinder output shaft and the horizontal hydraulic cylinder output shaft are loaded to the specified position, the test piece is positioned, the oil in the vertical hydraulic cylinder is output to the oil tank through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the oil tank through the second oil return pipeline; Test condition I: The horizontal motor group maintains idling operation to fix the displacement of the horizontal hydraulic cylinder output shaft. The condition control module adjusts the opening of the first servo valve to make the vertical hydraulic cylinder output shaft vertically load the test piece, thereby completing the compression performance test; The first signal processing module obtains the flow signal of the first servo valve and transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal; Test condition II: The vertical motor group continues to operate, so that the output shaft of the vertical hydraulic cylinder maintains pressure on the test piece continuously. The condition control module adjusts the opening of the second servo valve, so that the output shaft of the horizontal hydraulic cylinder loads the test piece horizontally according to the sine wave, thereby completing the shear performance test; The first signal processing module obtains the flow signal of the first servo valve, and transmits the signal to the first speed control module, the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal, the second signal processing module obtains the flow signal of the second servo valve, and transmits the signal to the second speed control module, the second speed control module transmits the signal to the horizontal motor group, so that the speed of the horizontal motor group changes with the change of the flow signal; Test condition III: The vertical motor group maintains idling operation, so that the vertical hydraulic cylinder output shaft continuously maintains pressure on the test piece. The condition control module adjusts the opening of the second servo valve so that the horizontal hydraulic cylinder output shaft loads the test piece horizontally at a uniform speed, thereby conducting an ultimate shear performance test. The second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the second speed control module. The second speed control module transmits the signal to the horizontal motor group so that the speed of the horizontal motor group changes with the change of the flow signal.

5. The performance testing method for a compression shear testing machine according to claim 4, characterized in that: In the positioning step, the oil in the vertical hydraulic cylinder is output to the cooling device through the first oil return pipeline, and the oil in the horizontal hydraulic cylinder is output to the cooling device through the second oil return pipeline. The cooling device first cools the input oil and then outputs it to the oil tank.

6. A performance test method for a compression shear test machine, using the performance test system for a compression shear test machine according to claim 1, comprising a positioning step, a test condition I step, a test condition II step, and a test condition III step, which is distinguished from claim 4 in that the test condition III step is updated as follows: Test condition III: The horizontal motor group maintains idling operation and supplies oil to the horizontal hydraulic cylinder. The condition control module adjusts the opening of the first servo valve and the second servo valve, opens the first oil supply switching valve group, and enables the vertical motor group to supply oil to the vertical hydraulic cylinder. At the same time, the first oil supply switching valve group supplies oil to the horizontal hydraulic cylinder. The output shaft of the vertical hydraulic cylinder maintains pressure on the specimen continuously, and the output shaft of the horizontal hydraulic cylinder loads the specimen horizontally at a uniform speed, thereby conducting an ultimate shear performance test. The first signal processing module obtains the flow signal of the first servo valve, the second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the first signal processing module, the first signal processing module transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal.

7. A performance test method for a compression shear test machine, using the performance test system for a compression shear test machine according to claim 2, comprising a positioning step, a test condition I step, a test condition II step, and a test condition III step, which is distinguished from claim 4 in that the test condition III step is updated as follows: Test condition III: The horizontal motor group maintains idling operation and stops supplying oil to the horizontal hydraulic cylinder. The second oil supply switching valve group is opened, so that the horizontal motor group supplies oil to the second oil return pipeline through the second oil supply switching valve group. The working condition control module adjusts the opening of the first servo valve and the second servo valve, opens the first oil supply switching valve group, so that the vertical motor group supplies oil to the vertical hydraulic cylinder, and at the same time supplies oil to the horizontal hydraulic cylinder through the first oil supply switching valve group. The output shaft of the vertical hydraulic cylinder continuously maintains pressure on the specimen, so that the output shaft of the horizontal hydraulic cylinder loads the specimen horizontally at a uniform speed, thereby conducting an ultimate shear performance test; The first signal processing module obtains the flow signal of the first servo valve, the second signal processing module obtains the flow signal of the second servo valve and transmits the signal to the first signal processing module, the first signal processing module transmits the signal to the first speed control module, and the first speed control module transmits the signal to the vertical motor group, so that the speed of the vertical motor group changes with the change of the flow signal.

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