SU879565A1 - Flow governor - Google Patents

Description

(54) FLOW REGULATOR

one

The invention relates to control systems for non-electric quantities, in particular, to flow regulators in a fluid flow without auxiliary energy sources.

Throttle regulators are known which, when changing the output pressure, ensure a practically constant pressure drop and, accordingly, a constant flow rate of the liquid.

These controls consist of p, two chokes, one of which has a constant setting, and the other is automatically adjustable. They are designed to operate at a constant load on input 1.

A flow regulator is also known to maintain a constant flow rate at a variable load. In this flow control valve, a movable piston with a throttle, located in the housing, is spring-loaded with a spring, the force of which is balanced by the differential pressure.

between the inlet and outlet cavities created by the choke. As the flow rate in the exit cavity increases or the pressure in the discharge cavity increases, the pressure drop increases. As a result, a spring-loaded piston with a throttle moves and partially overlaps the outlet opening, reducing the flow rate to the value for which the flow controller is designed.

10 When the pressure in the inlet cavity decreases, the piston with the throttle moves in the opposite direction under the action of the spring. As a result, the total resistance will decrease, and the flow of the fluid will not change. When the flow direction changes, the piston with the throttle under the action of the spring will be set to the extreme position and the liquid flows at a constant

20 resistance 2.

Such flow controllers operate on the pressure drop in the inlet and outlet cavities and do not change the flow rate.

u write down (name of pressure in pti: -: cavity).

The purpose of the invention is to provide flow control depending on the magnitude of the pressure and the magnitude of the pressure difference at the inlet and outlet cavities, improving accuracy and extending the control range.

This goal is achieved in that in the regulator housing between the inlet and outlet cavities a silo is installed, one end of which is located outside the body cavity and is spring-loaded, and a spring-loaded piston with a throttle is mounted on the other end. Plun area- 15

The temperature in the place of its exit from the body does not equal the area of the spring-loaded piston with the throttle. Here, flow control depends on the magnitude of the pressure in the inlet and outlet cavities.

The drawing shows the proposed flow control in section.

. The housing t of the flow controller has an input 2 and an output 3 cavities. In the housing 1 there is a plunger 4, one end of which is located outside the cavity of the housing 1 and spring loaded with a spring 5 and at the other end a piston with a throttle 7 spring loaded with spring 6 is installed.

In direct control, the flow regulator operates as follows.

Fluid enters the inlet cavity 2, and then through the piston with a throttle into the output cavity 3. At pressures lower than the pressure required to overcome the friction forces and the initial force of the spring 5, the flow is regulated by moving the piston with the throttle 7 through the plunger 4. When the pressure in the inlet cavity 2 increases, the piston with the throttle 7 will move, compressing the spring 6, after which the plunger 4 will begin to move, compressing the spring 5. When the pressure in the inlet cavity 2 or in the outlet cavity 3 reaches the specified value, the plunger 4 remains When the pressure in the outlet cavity 3 reaches a value equal to the pressure in the inlet cavity 2, the spring 6 expands by moving the piston with the throttle 7. Further control in case of pressure fluctuations in the inlet 2 and outlet 3 cavities within the sensitivity of the plunger 4 behind

By moving the piston with the throttle 7 through the plunger 4. With a further increase in pressure in the input cavity 2 or a drop in pressure in the output cavity 3, the plunger 4 will move and the adjustment process will repeat.

In the reverse control, the piston with the throttle 7 is set to its extreme position by the action of the spring 6, and the fluid expires with constant resistance. At the moment when the specified pressure is reached in cavity 2 or cavity 3, plunger 4 begins to move, compressing spring 5.

In the case of the square of the plunger 4 in place of its exit from the housing J is equal to the area of the spring-loaded piston with the throttle 7, the flow rate

in the forward and reverse control, it will depend on the pressure in the inlet cavity 2 and not depend on the pressure in the outlet cavity 3.

 Thus, installing a plunger regulator in the housing, one end of which is located outside the housing cavity and spring-loaded, and a spring-loaded piston with a throttle mounted on the other end, allows the controller to expand its range of application by ensuring that the flow is controlled depending on the pressure value and the difference pressures in the inlet and outlet cavities, as well as improve the accuracy of flow control.

Claims (2)

1. A flow regulator comprising a housing, between which the inlet and outlet cavities of which is located a spring-loaded piston with a throttle, characterized in that expanding the field of application and improving the accuracy of the controller; a plunger is installed in its housing, one end of which is located outside the housing cavity and is spring-loaded, and a spring-loaded piston with a throttle is mounted at the other end, 2. The regulator according to claim 1, which means that the area of the spring-loaded piston with the throttle and the area of the plunger in the place of its exit from the body are equal. Sources of information that are considered in the examination will change to the extent necessary. 5 1. Bashta T.N. Hydraulic actuators of aircraft. M., Mechanical Engineering, 1967, p.273, Fig.208. W $ $$$$$ 1 g 7 ttsh J 8795656 2. Bashta TN Hydraulic drives of aircraft. M, Mashinostroeni: e, 1967, p. 285, Fig.218 (prototype). / mjmm