SU455198A1 - Pressure limiting valve - Google Patents

Description

one

This invention relates to the control of pressure in gas lines, for example, an aircraft engine air starter supplied to a turbine.

Pressure regulators are known, which include a valve of a spool-type differential pressure constant with feedback channels and a switch-on valve for supplying the working fluid.

The purpose of the invention is to simplify the design of the valve.

This is achieved by the fact that in the proposed damper, the electromagnet control and the means are connected to the control spool.

The drawing shows the layout of the proposed pressure limiting valve.

The valve consists of a housing 1, a plunger 2 with prulsine 3, located in the plugplate cavity 4, which is connected by channel 5 to cavity 6 between the cores of spool 7. The cavity 8 in front of the spool can be communicated with the atmosphere by channel 9. In addition, cavity 6 between Sikol spool is communicated by channel 10 with the entrance to the valve, and the iolost 8 in front of the valve - channel 11 with the sub-plunger cavity of the valve. The control electromagnet 12 is connected via a rod 13 with a regulating slide valve 7, spring-loaded adjustment plate 14 with an adjusting screw 15.

In the absence of a compressed air supply to the damper inlet, the plunger 2 under the action of spring 3 shuts down the damper inlet. When supplying compressed air and air inlet flap

enters through channel 10, cavity 6 and channel 5 into the iodine plunger iolost 4 valves. The pressure in the cavity 4 is equal to the pressure at the entrance to the valve, and the plunger 2 under the action of the spring 3 locks the entrance of the valve. In order to open the valve, an air valve is applied to the electromagnet 12, the rod 13 is retracted and releases the gold 7, which is moved to the left by the action of the spring 14, and the cover drops 10 and opens the channel 9. The cavity 4

through channel 5 and iolost 6 communicates with the atmosphere by channel 9. Under pressure from the inlet, plunger 2 overcomes the force of the spring 3 and opens the orifice of the valve.

If the pressure at the outlet of the valve and the pressure of the limit determined by the slow spring 14 increases, the spool 7 iodine by the action of pressure in the cavity 8 moves to the right, covering the channel 9 and opening the channel

10. At the same time, the air through channel 10, cavity 6 and kaialu 5 will enter the sub-plunger cavity 4, and plunger 2 begins to cover the valve opening until the pressure behind the valve is balanced.

spring 14. The magnitude of the pressure limitation can be adjusted with the screw 15.

Subject invention

A pressure limiting valve, comprising a housing with a spring-loaded plunger installed therein, a control electromagnet and a spring-loaded control spool in fluid communication with the cavities on the entrance to the damper, behind the damper and with the sub-plunger cavity of the damper, characterized in that, in order to simplify the design, the control electromagnet directly connected to the control spool.