SU1107110A1 - Pressure regulator - Google Patents

Abstract

A PRESSURE REGULATOR, comprising a housing with inlet and outlet nozzles, in which a sensing element loaded with a spring task is placed, which is connected to a shutter made in the form of a glass with rows of windows with working edges forming the regulator | 1st organ with a radial clearance mounted relative to it and a body saddle connected to the body with rows of windows with working edges, characterized in that, in order to improve the reliability and accuracy of the regulator, the distance between the working edges of adjacent rows of gate windows more distance between the working edges of adjacent rows of seats of the saddle by at least twice the radial clearance between the saddle and the gate.

Description

11 The invention relates to hydraulics and can be used to control the pressure of a fluid or gas in various pneumatic and hydraulic systems. A pressure regulator is known, comprising a housing with inlet and outlet nozzles, in which a sensing element is loaded with a spring loaded task and connected to a regulating body 11. The disadvantages of this regulator are low accuracy and reliability of pressure regulation, due to the presence of large hydrodynamic forces in the regulator and design complexity. Closest to the invention is a pressure regulator containing a housing with inlet and outlet cuts, in which a sensing element connected with a regulating member, filled in the form of a fixed and movable cup with rows of windows, is placed with a loaded spring. The disadvantages of the known devices are low accuracy and reliability due to the possibility of self-oscillations, especially with small openings of the regulator. The aim of the invention is to improve the accuracy and reliability of the controller. The goal is achieved by the fact that the pressure regulator contains a housing with inlet and outlet nozzles in which a spring loaded load element is assigned 1 sensing element connected to a valve filled with a glass with working edges forming a regulating member with a saddle in the form of a glass with rows of windows with working edges fixed against it with a radial gap and rigidly connected to the body, the distance between the working edges of adjacent rows of the eye of the gate is greater than the distance between the working edges pitted adjacent rows of windows se la at least twice the radial clearance were rank between the seat and gate. FIG. 1 shows the proposed controller, a general view; in fig. 2, node 1 in FIG. 1. in positions: and when all windows are closed, b - when one window is closed from 02, in - when two windows are open. The regulator includes a housing 1 with an inlet 2 and an outlet 3 with nozzles, a regulator formed by seat A and a bolt 5 connected by a rod 6 with a plate 7 of the sensing element 8 loaded with a spring of task 9. In case 1 there are nozzles 10 (for supplying control the working medium cavity from the device inlet) and 11 (to reset the leakage of the working medium. Saddle 4 from Shutter 5 have windows 12 and 13, respectively. Windows 12 are made in annular recesses 14. The last and side surfaces of the saddle 4 form the working edges 15 of the saddle 4, and windows 13 and inner side the surface of the bolt 5 is the working edges 16 of the bolt 5 (Fig. 2a). The saddle 4 is installed in the bolt 5 with a radial clearance of cG. The distance is in the axial direction between the adjacent working edges 15 of the windows 12 of the saddle 4 is greater than the distance between the adjacent working edges 16 the windows 13 of the shutter 5 is at least twice the size of the gap sG between the saddle 4 and the shutter 5. The device operates as follows: In the initial position, the regulator body of the regulator is closed (FIG. 2a). When the working medium is supplied to the saddle 4 and through the nozzle 10 to the control cavity of the regulator and its pressure is above a predetermined level, the sensitive element 8 overcomes the spring force of task 9 and moves the rod 6 with the gate 5 upwards, increasing the areas of the cross section of the slots | 15 and 16 sedans 4 and shutter 5 and, accordingly, the flow rate of the working medium through the controller. In the process of moving the shutter 5, an annular gap is formed between the working edges 15 and 16, first the first row of windows 12 and 13 (Fig. 26), and when its value becomes more than 26 between the working edges 15 and 16 of the second row of windows 12 and 13 (Fig . 2c). Hydrodynamic reactive forces arising on the windows 12 and 13 of the controller reach the maximum value alternately at each row of windows, which reduces their total value.

and significantly reduces the danger of self-oscillations of the movable regulator system and, accordingly, increases its reliability. At the same time, the reduction of these forces reduces the static error of the device and increases the accuracy of the pressure control.

107110

Thus, this pressure regulator provides greater reliability of operation and accuracy of pressure control, which, for example, in the case of its use in an engine test bench, accelerates the bench adjustment of the latter.

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FIG. 2

Claims (1)

PRESSURE REGULATOR, comprising a housing with inlet and outlet nozzles, in which a sensing element is loaded, loaded with a task spring, connected with a shutter made in the form of a glass with rows of windows with working edges, forming a regulating body with a radial clearance mounted relative to it, and I with a saddle body in the form of a glass with rows of windows with working edges, characterized in that, in order to increase the reliability and accuracy of the regulator, the distance between the working edges of adjacent rows of shutter windows is more s Chez distance between the working edges of adjacent rows of windows of the saddle by at least twice the radial clearance between the seat and gate. S Q