SU540259A1 - Flow regulator - Google Patents

Description

pressure loss in the throttle slightly increases the pressure in the hydraulic drive.

Also known is a flow regulator that provides the same speed of the power cylinder during forward and reverse strokes and has a housing with input and output channels and three cavities in it, the first of which has a throttle slit connected to the input and output channels. - a reverse valve and a constant pressure differential device at the throttle, slits installed in series with the throttle slit, in the third - a check valve and a constant pressure differential device at the throttle slit, installed parallel to the throttle gap.

However, in the specified regulator, due to the installation of two devices of CONSTANT pressure differential, it is difficult to ensure the same flow rate of the working fluid through the throttle gap in the forward and reverse flow directions of the working fluid, and consequently, the same speed of the power cylinder.

Of the known flow controllers that provide the same speeds of movement of the power cylinders, the closest to the technical essence is the flow regulator, having a housing with a check valve made in it and two inlet and one outlet channels and two cavities, in the first of which a movable spool valve, forming with the case two throttling adjustable slots connected to the inlet channels, in the second - two devices of constant pressure difference on the throttling slots, DOE of which is connected with the output channel and the corresponding input channel.

In the indicated flow control valve, the presence of a check valve and two constant pressure drop devices on the throttling slots reduces the accuracy and reliability of the controller, increases its size, weight and cost.

The aim of the invention is to simplify the design of the regulator and increase the reliability of its operation.

To do this, a third cavity is made in the housing of a known flow regulator with a shuttle valve installed in it, made in the form of a piston, dividing the cavity into two chambers connected to the inlet channels, and a channel connecting the third cavity with the second one is made below the chamber.

The drawing shows the flow regulator.

It comprises a housing 1 in which there are three cavities. In one of the cavities there is a movable spool valve with throttle gaps, consisting of a sleeve 2 with holes a and b of equal resistance and the same design, spool 3, spring 4. There are longitudinal 5 and transverse 6 and 7 channels in the spool for oil passage in the sleeve - transverse channel 8.

In the second cavity, a constant pressure differential device is installed on throttles 5, consisting of gun 9, sleeves 10 and 11, spool 12, throttle 13, pusher 14 and spring 15.

In the third cavity, a shuttle valve is installed, made in the form of pressure 16, dividing the cavity into two chambers 17 and 18, which are connected to inlet channels 21 and 22 by channels 19 and 20, respectively. A channel 23 is made connecting the third cavity with Right cavity Porsch 9. 5 The outputs of the openings a and b are connected by channels 8 and 24 to the throttle 13 and spool 12, channel 25 to the left cavity of the front 9. The flow rate of the working fluid through the holes a and b is controlled by moving the spindle 3.

The output channel 26 is connected with a drain, the output channel 27 - with drainage.

During operation, one of the input channels is connected to the corresponding pressure line, 5 and the other is disconnected.

The working fluid from the inlet channel goes to the drain through the channel 26 and into the right and left cavities of the wall 9. To drain the working fluid passes through the throttling gap, Formed with sleeve 2 and spool 3, the regulator and throttling channels formed by the throttle 13 and spool 12. The working fluid enters the right cavity of the Porsch 9 directly from the inlet channel, 5 pressing the Porsche 16 right or left, and the Polshn 9 left into the left cavity through the throttling gap formed by the sleeve 2 and spool 3.

The pressure drop across the throttles, 0 formed by the openings a and b of the sleeve 2 with the movable slide 3 and the flow through them is maintained regardless of the pressure on the inlet channels constant automatically by changing the value of opening (closing) by the piston 9 of the gap formed by the throttle 13 and spool 12.

Due to the use of the third cavity in the flow controller, with a shuttle valve located in it, made in the form of port 16, which separates the cavity in chamber 2, connected to the input channels, and under the pressure channel, the channel connecting the third cavity to the second cavity was reduced dimensions, reduce weight and cost, 5 to increase the reliability of the flow-rate regulator, since instead of two devices of constant pressure drop one is installed.

Claims (1)

60 Formula of Invention A flow regulator comprising a housing with two inlet and one outlet channels and two cavities made therein, 65 in the first of which a movable a spool valve, which forms with the body two throttling adjustable slots connected to the inlet channels, and in the second, a constant pressure differential across the throttling slots, connected to the outlet channel, characterized in that, in order to simplify the regulator and increasing its reliability; a third cavity is made with a housing with a shuttle valve installed in it, made in the form of a piston dividing the cavity into two chambers connected to the inlet channels, and a channel connecting the third cavity with the second cavity is made under the chamber.