A hydraulic cylinder independent control system of a rock triaxial creep testing machine
A three-axis creep and independent control technology, which is applied in the direction of fluid pressure actuation system components, mechanical equipment, fluid pressure actuation devices, etc., can solve the scope of application and targeted restrictions, and cannot apply pressure at a single point on different rocks and other issues to achieve the effect of improving the scope of application
Active Publication Date: 2021-02-19
SHAOXING UNIVERSITY
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Problems solved by technology
Most of the current rock creep testing machines use hydraulic servo control to achieve constant pressure. The existing triaxial tests all use integral control, that is, one-sided pressure is applied to the rock as a whole, and single-point pressure cannot be applied to different rocks, or according to The size of the rock adjusts the pressure area, so its scope of application and the range and pertinence of the force are limited to a certain extent
Method used
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Embodiment Construction
[0017] refer to figure 1 The embodiment of the hydraulic cylinder independent control system of a rock triaxial creep testing machine of the present invention will be further described.
[0018] A hydraulic cylinder 13 independent control system of a three-axis rock creep testing machine, including a fuel tank 1, a two-position four-way electromagnetic reversing valve 19, and several parallel hydraulic cylinders 13 located in the rock triaxial direction, the fuel tank 1 An oil filter 3 is connected, and the oil filter 3 is connected with a hydraulic pump 20, and the hydraulic pump 20 is connected with a motor 2, and the output end of the hydraulic pump 20 and the oil tank 1 are connected to the two-position four-way electromagnetic reversing valve 19. The two output ends of the two-position four-way electromagnetic reversing valve 19 are respectively connected with two three-position two-way electromagnetic reversing valves 18, and the two output ends of the three-position two...
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The invention discloses a hydraulic cylinder independent control system of a three-axis rock creep testing machine, which comprises a fuel tank, a two-position four-way electromagnetic reversing valve and several parallel hydraulic cylinders located in the three-axis direction of the rock. There is an oil filter, the oil filter is connected with a hydraulic pump, the hydraulic pump is connected with a motor, the output end of the hydraulic pump and the oil tank are connected with the output end of the two-position four-way electromagnetic reversing valve, and the two-position four-way The two output ends of the electromagnetic reversing valve are respectively connected with two three-position two-way electromagnetic reversing valves, and the two output ends of the three-position two-way electromagnetic reversing valve are respectively connected with the first reversing valve and the second reversing valve in parallel. Two reversing valves, the flow limiting directions of the first reversing valve and the second reversing valve are opposite, and the parallel output ends of the first reversing valve and the second reversing valve of the two groups are respectively connected to the oil inlet of the hydraulic cylinder Port and oil return port, the invention provides a hydraulic cylinder independent control system of a rock triaxial creep testing machine with good application range.
Description
technical field [0001] The invention relates to the field of rock testing equipment, and more specifically relates to an independent control system of a hydraulic cylinder of a rock triaxial creep testing machine. Background technique [0002] The triaxial creep test of rock is an important means to measure the long-term mechanical behavior of rock, and the test time usually can be as long as several months, and at most it can be several years. The creep test process usually involves multi-level differential stress (axial pressure minus confining pressure). During the application of stress at all levels, its value must be kept constant strictly to ensure reliable test data. The current rock creep testing machines mostly use hydraulic servo control to achieve constant pressure. The existing triaxial tests all use integral control, that is, one-sided overall pressure is applied to the rock, and single-point pressure cannot be applied to different rocks, or according to The si...
Claims
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IPC IPC(8): F15B11/20F15B13/06F15B21/0423F15B21/041
CPCF15B11/205F15B13/06F15B21/041F15B21/0423
Inventor 彭岩岩郭鹏飞徐军赵菲肖晓春张晓云张海江
Owner SHAOXING UNIVERSITY