Low Friction Piston Actuator
An actuator and piston-type technology, applied in the field of low-friction piston actuators, can solve problems such as large frictional resistance and affecting the adjustment performance of the actuator, and achieve small frictional resistance, low assembly interference requirements, and strong environmental adaptability Effect
Active Publication Date: 2017-03-15
WUXI SMART AUTO CONTROL ENG CO LTD
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Problems solved by technology
However, in the process of piston action, due to the large interference of rubber installation, the frictional resistance is relatively large, which seriously affects the adjustment performance of the actuator. The designed and produced pneumatic piston actuator can only be used as a driving device for general working conditions. Use, cannot meet the application requirements of regulating valves with one-thousandth or higher regulation
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[0027] The present invention will be further described below in conjunction with specific drawings and embodiments.
[0028] As shown in the figure, the low-friction piston actuator in the embodiment mainly consists of an upper cylinder body 1, a first compression spring 2, a lock nut 3, a push rod 4, a piston 5, an intermediate cylinder cover 6, and a first O-ring 7. Inner curved PTFE ring 8, PTFE O-ring 9, second O-ring 10, hex head bolt 11, third O-ring 12, shaft sleeve 13, fourth O-ring 14, fifth O-ring Type ring 15, oil-free bushing 16, support 17, second hex head bolt 18, lower cylinder body 19, second compression spring 20 and hexagon nut 21 and other parts.
[0029] Such as figure 1 As shown, the upper cylinder body 1 and the lower cylinder body 19 are symmetrically arranged face to face, the middle cylinder head 6 is clamped between the upper cylinder body 1 and the lower cylinder body 19, and the upper cylinder body 1, the middle cylinder head 6 and the lower cylind...
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The invention relates to a low-frictional piston type actuator. An upper cylinder body is vertically and symmetrically arranged with a lower cylinder body face to face, a middle cylinder cover is clamped between the upper cylinder body and the lower cylinder body, and the upper cylinder body and the lower cylinder body are fastened and connected into one; the piston is arranged in an inner hole of the middle cylinder cover, a piston sealing guide component is arranged between an outer circle surface of the piston and an inner hole surface of the middle cylinder cover; a push rod is connected to the center of the piston, a first compression spring is arranged between the upper surface of the piston and the inner surface of the upper cylinder body, a second compression spring is arranged between the lower surface of the piston and the inner surface of the lower cylinder body; the lower cylinder body is fixed on a bracket, and the top part of the bracket is provided with a push rod inserting hole, and the push rod is inserted to the bracket from top to bottom through the push rod inserting hole; the lower end of the push rod is an external output end of the actuator. The low-frictional piston type actuator can remove the speed overshoot generated in the course of rapidly adjusting the actuator; moreover, the guidance is accurate and frictional resistance is small, so that the actuator can rapidly respond the control signal, and thereby reaching the purpose of accurately adjusting.
Description
technical field [0001] The invention relates to a piston-type actuator, in particular to a low-friction piston-type actuator with fast response and high-precision adjustment performance. Background technique [0002] In the prior art, most piston actuators use rubber seals such as O-rings and Y-rings as moving piston seals, and PTFE belts as piston guides. However, in the process of piston action, due to the large interference of rubber installation, the frictional resistance is relatively large, which seriously affects the adjustment performance of the actuator. The designed and produced pneumatic piston actuator can only be used as a driving device for general working conditions. It cannot meet the application requirements of regulating valves with one-thousandth or higher regulation. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a low-friction piston actuator with ingenious structur...
Claims
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IPC IPC(8): F16K31/122
CPCF16K31/1221
Inventor 陈彦邓传湖徐刚
Owner WUXI SMART AUTO CONTROL ENG CO LTD