SU1550165A1 - Control valve unit for hydraulic systems of power supports - Google Patents

Abstract

The invention relates to underground coal mining, in particular, to hydraulic systems for controlling mechanized supports and hydraulic shifters. The goal is to increase the efficiency of the hydraulic systems by reducing the pressure loss of the working fluid in the distributor. The distributor includes a housing 1 with a seat 9 installed on it and a swivel block 2. In the latter, its axes 3 are parallel to its center 3 and peripheral 4 bores (P) interconnected by 5, 6 windows. bushings (B) 7 and from below — the upper end of the central B 8. The springs 10 and 11 B 7, 8 are pressed to the saddle 9. When the distributor is turned on, most of the liquid through the central B 8 enters the peripheral B 7 through the additional window 6 and partially through the window 5, as a result e thereby increasing the flow cross section of the distributor. Exceeding the depth of the central P 3 in comparison with the depth of the peripheral P 4 helps to reduce the turbulence of the fluid flow at the inlet to the window 5 and, accordingly, to reduce the pressure loss. 3 il.

Description

wearable window 6 and partially through

window 5, thereby increasing the flow area of the distributor. The excess depth of the central P 3 compared with the depth of the periphery1550165

Emergency P 4 helps to reduce the turbulence of the fluid flow at the inlet to the window 5 and, accordingly, reduce the pressure loss 3 sludge.

The invention relates to underground coal, in particular, to hydraulic systems for controlling mechanized supports and hydraulic shifters.

The purpose of the invention is to increase the efficiency of the hydraulic systems by reducing the pressure loss of the working fluid in the distributor.

Figure 1 shows the proposed distributor; 2, 3 - sections A-A and B-B along the jumper and the window of the rotary unit, respectively, the Distributor includes a housing 1, a rotary unit 2 with bores 3 and 4 arranged in it, interconnected by a window 5 and an additional a window 6 limited in height from above by the level of the upper end of the spring of the peripheral sleeve 7, and from below by the upper end of the central sleeve 8. The sleeves 7 and 8 are pressed against the saddle 9 by the springs 10 and P.

The distributor works as follows

When the distributor is turned on, most of the liquid through the central sleeve 8 enters the peripheral sleeve 7 through the additional window 6 and partially through the window 5, as a result of which the flow area of the distributor increases.

Exceeding the depth of the central bore 3 in., Compared with the depth of the peripheral bore 4, helps to reduce the turbulence of the fluid flow at the inlet, into the window 5 and, accordingly, to reduce the pressure loss.

Claims (1)

Invention Formula 0 five 0 five A distributor for hydraulic systems of mechanized supports, comprising a housing with a seat mounted on it and a turning unit with parallel central and peripheral bores in it parallel to its axis, in which are central supply and peripheral distribution spring-loaded bushings, the cavities of which are interconnected by a window that differs that, in order to increase efficiency by reducing the pressure loss of the working fluid, between the parallel bores of the rotary unit, additional a button limited in height from above by the level of the upper end of the spring of the peripheral sleeve and from below by the upper end of the central sleeve, while the depth of the central bore is greater than the depth of the peripheral bore