Fork force-moment conversion device
A conversion mechanism and fork-type technology, applied in the field of force-torque conversion mechanism, can solve the problems of low driving efficiency, high cost, complex structure, etc., and achieve the effect of enhanced reliability, low cost and simple structure
Inactive Publication Date: 2008-07-02
SHENYANG NORTHEAST ELECTRIC POWER CONTROL
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Problems solved by technology
However, in the drive of butterfly valves and ball valves, this linear drive is not conducive to the opening and closing of the valves. The opening of butterfly valves and ball valves has a logarithmic relationship with the driving torque. If a linear characteristic mechanism is used to drive logarithmic The characteristic valve cannot effectively protect the valve, and the driving efficiency is low
At the same time, the rack and pinion transmission mechanism has the defects of complex structure and high cost.
Method used
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Embodiment Construction
[0010] Apply this mechanism to a hydraulic cylinder to drive a butterfly valve.
[0011] The force acting on the slider 2 mentioned above comes from the piston rod 1 of the hydraulic cylinder or the pneumatic cylinder, and the slider is fixed on the piston rod of the hydraulic cylinder or the pneumatic cylinder. In the slideway 4, the angle between the piston rod and the fork clamp is less than 90°, the piston rod and the fork are not on the same straight line, and the fork is fixed on the output shaft 5. In order to ensure that the piston rod can run in a straight line reliably, there is also a sliding sleeve 7 on the piston rod. The slider and the sliding sleeve are connected as a whole. axis. The working process is as follows: when the hydraulic oil cylinder outputs power and moves back and forth in a straight line, the fixed slider moves back and forth in the slideway of the pulling fork, and the pulling fork rotates back and forth within the range of 90°, that is, the pr...
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The invention provides a shift fork-type force-torque conversion mechanism and aims to solve the technical problems that a valve in a pipeline is used to control the flow and pressure of fluid in the pipeline and the valve is operated by a gear-rack transmission mechanism using a force output from a hydraulic oil cylinder. The gear-rack transmission mechanism has the disadvantages of complicated structure, poor reliability and small output torque. The technical proposal of the invention is that a shift fork is arranged on an output shaft and is provided with a slide track, a slipper for actuating the shift fork is positioned inside the slide track, and the included angle between a linear action force on the slipper and the shift fork is smaller than 90 degrees. The invention has the advantages that: the linear action force of a piston rod is converted into an output torque, so that, under the condition of the same input force, the output torque is doubled to the prior art; when the semi-diameter of the shift fork is increased, the output torque is increased as well; and the structure is simple and the cost is low.
Description
technical field [0001] The invention relates to a force-torque conversion mechanism in a transmission mechanism, in particular to a fork-type force-torque conversion mechanism which is used in a hydraulic, pneumatic or motor-driven valve operation and can ensure the safe operation of the valve. Background technique [0002] In most cases, the driving device for driving valves, air doors and other equipment is 0-90°rotational motion, and a mechanism is needed to convert linear motion into rotary motion, and convert linear thrust into torque. This force-torque conversion mechanism generally adopts a rack and pinion mechanism. The rack and pinion transmission mechanism is a linear mechanism, the linear thrust and torque are a linear relationship, and the linear motion speed and rotational angular velocity are also a linear relationship. However, in the drive of butterfly valves and ball valves, this linear drive is not conducive to the opening and closing of the valves. The op...
Claims
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Inventor 刘宝军刘江郑文涛
Owner SHENYANG NORTHEAST ELECTRIC POWER CONTROL