Two-position three-way valve and vibration isolation system with same

Abstract

The invention discloses a two-position three-way valve and a vibration isolation system with the same and belongs to the technical field of valves. The valve comprises a valve body lower cover, a valve sleeve fixed in the valve body lower cover and a valve core arranged in the valve sleeve in a sliding mode. An air inlet and an air outlet which are staggered in position are formed in the side of the valve body lower cover. A first air vent and a second air vent are formed in the corresponding positions of the air inlet and the air outlet respectively. An exhaust port is formed in the upper surface of the valve core, a first ventilation groove is formed in the circumference of the side of the valve core, and the height of the first ventilation groove is larger than the distance between the first air vent and the second air vent. The height of a lower shaft shoulder of the valve core is identical to the height of the second air vent. By means of the system, switching between different states can be achieved by moving the valve core for small travel vertically, and accordingly, the adjusting accuracy is high.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a two-position three-way valve and a vibration isolation system provided with the two-position three-way valve. Background technique [0002] In the precision instrument industry at home and abroad, the air spring is a widely used vertical vibration isolation mechanism. It has the advantages of simple manufacturing and processing, low cost and good vibration isolation performance. However, its normal use is closely related to the height adjustment valve. Inseparable, when the load changes or there is external disturbance, the working height of the air spring changes, and the height regulating valve controls the air spring to perform the inflation and deflation operation to quickly return to the original working height position. [0003] At present, many height adjustment valves in use are excellent adjustment devices, but their adjustment accuracy has been difficult to meet the ne...

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Problems solved by technology

[0003] At present, many height adjustment valves in use are excellent adjustment devices, but their adjustment accuracy has been difficult to meet the needs of more sophisticated instruments. For example, the VM131 series height adjustment valves of Japan SMC Company can also be designed through some mechanical structures. Realize the two-position three-way function, but after repeated use, the spool must move a tenth of a millimeter (±0.1-±0.3mm) to achieve switching between different states, which directly affects the adjustment of the regulating valve precision

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