Hydraulic control speed change device and method and hydraulic mud pump with speed change device
A technology of variable speed device and hydraulic control, applied in the field of hydraulic mud pump, can solve the problem that the working speed of hydraulic mud pump cannot be changed, and achieve the effect of improving drilling efficiency
Inactive Publication Date: 2015-09-23
黄泽明
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Problems solved by technology
[0006] The purpose of the present invention is to provide a hydraulically controlled speed change device, a speed change method and a hydraulic mud pump including the speed change device that can be freely switched between two working modes, so as to solve the problem that the working speed of the hydraulic mud pump cannot be adjusted when the quantitative hydraulic pump is used. changing technical issues
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[0047] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.
[0048] see Figure 4 and Figure 5 , The hydraulic control transmission device of the present application is composed of an electromagnetic reversing valve and six logic valves, wherein the P and T oil circuits are control oil circuits, and the A and B oil circuits are working oil circuits. Assuming that the output flow rate of the hydraulic oil of the quantitative pump is Q, the maximum pressure of the hydraulic system is P, the bore diameter of the oil cylinder is D, and the diameter of the piston rod of the oil cylinder is d, the working principle is as follows:
[0049] 1. Assume that the electromagnetic reversing valve is in Figure 4 position, the first logic valve 9, the fourth logic valve 12, and the fifth logic valve 13 are opened, and the secon...
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The invention provides a hydraulic control speed change device and method and a hydraulic mud pump with the speed change device. The hydraulic control speed change device can be freely switched between two working modes and comprises an electromagnetic valve, logic valves controlled by the electromagnetic valve and at least two piston oil cylinders. Each piston oil cylinder is provided with two oil ports in a rod end chamber and a non-rod end chamber respectively, and when the oil port (n) of the rod end chamber of the first oil cylinder and the oil port (w) of the rod end chamber of the second oil cylinder are communicated to form a closed chamber, the oil ports (m) of the non-rod end chambers of the first oil cylinder and the second oil cylinder are communicated with a hydraulic power station. When the oil port (m) of the non-rod end chamber of the first oil cylinder and the oil port (u) of the non-rod end chamber of the second oil cylinder are communicated to form a closed cavity, the oil ports (n) of the rod end chambers of the first oil cylinder and the second oil cylinder are communicated with the hydraulic power station. The electromagnetic valve controls the logic valves to be switched between the two connection relations, through the difference between the force-bearing area of the rod end chambers and the non-rod end chambers of the hydraulic oil cylinders, output of the hydraulic mud pump at two gear speeds is achieved, and the working condition adaptability of the hydraulic mud pump is improved.
Description
technical field [0001] The present invention relates to the technical field of control of hydraulically controlled transmission, in particular to a hydraulically controlled transmission capable of freely switching between two working modes, a transmission method and a hydraulic mud pump including the transmission. Background technique [0002] The mud pump is an indispensable supporting equipment in engineering geological drilling. Its most common structure is to drive the mud piston to reciprocate in the pump cylinder through the crankshaft connecting rod mechanism. The working principle is as follows: figure 1 As shown: when the mud pump piston 02 moves to the left, the working chamber of the mud pump cylinder 01 is lower than the atmospheric pressure, the second valve 04 is closed under the action of atmospheric pressure, and the first valve 03 is opened, and the fluid medium passes through the first The valve 03 is sucked into the working chamber; when the mud pump pisto...
Claims
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Login to View More IPC IPC(8): F16H39/08F16H61/4035F04B49/22
CPCF16H39/08F04B49/22F16H61/4035
Inventor 黄泽明
Owner 黄泽明