SU1203265A1 - Arrangement for braking and arresting the load - Google Patents

Description

one

The invention relates to damping agents using a liquid or gas as an absorbing medium for cushioning and can be used, in particular, in cutting machines with longitudinal feeding of logs.

The aim of the invention is to improve the frequency response of the device by increasing the filling rate of the piston cavity of an adjustable throttle.

The drawing shows a diagram of the device.

The device contains a hydraulic cylinder

1c is a depreciation chamber 2 and an adjustable choke 3, equipped with a spool 4 and a piston 5, mounted for axial movement and interaction with each other through a spring 6, and in the initial position between the piston 5 and the spool 4 a gap 7 is provided. The cavity 8 of an adjustable throttle 3 is directly communicated with the drain,

with a shock-absorbing chamber 2 through an annular throttling gap 9 and with an output line 10 of the on-off hydraulic distributor 11 through a check valve 12. Piston cavity 13 throttles 3 are connected to the highway 10 through a constant choke 14 and with a damping chamber

2 Through a constant choke 15 and check valve 16.

The cavity 17 behind the piston 18 of the hydraulic cylinder 1 communicates with the atmosphere. The inputs of the hydraulic distributor are communicated with pressure line 19 and discharge line 20.

When the device operates, the braking force P creates pressure p for the shock-absorbing chamber 2, depending on the braking speed. Oil under this pressure enters the regulated

C32652

the throttle 3, the slide valve 4, compressing the spring 6, and is drained through the annular gap 9.

Since in deceleration mode

5, the valve 11 communicates the line 10 with the drain; the oil simultaneously flows through the check valve ° 6 and the constant throttles 15 and 14, creating a backwater in the cavity 13.

10, due to the difference in the areas of the spool 4 and the piston 5, the spool 4 together with the piston 5 move in the direction of the annular gap 9, gradually blocking the latter, so that the hydraulic resistance between the damping chamber 2 and the drain increases and the braking effect increases (braking force increases.

20 At the end of braking, the gcc-distributor 11 communicates line 10 with a pressure line 19 and the oil enters the damping chamber 2 through the check valve 12,

25 returning piston 18 to its original position. After that, the valve 11 tells the line 10 to the drain line 20 and the spring 6 returns the adjustable throttle 3

30 in the initial state.

The frequency response of the device as a whole, which determines the frequency of duty cycles, depends on the speed

35 working movement of the spool 4 (to close the gap 9) and the speed of return of the adjustable throttle 3 to the initial state. In turn, the speed of the working movement

4Q is determined by the difference in flow sections of the constant chokes 14 and 15, and the rate of return of the adjustable choke 3 to the initial state is the sum of the flow sections of these chokes.

Compiled by V.Yakovenko Editor A.Vorovich Tekhred Z.Kastelevich Proofreader A.T.

Order 8АОО / 39 Circulation 897 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

Claims (1)

DEVICE FOR BRAKING AND STOPPING OF GOODS, comprising a hydraulic cylinder with a shock absorber connected to the supply line through a non-return valve and to the drain line through an adjustable throttle, in the case of which axial displacement, spring and piston interact with each other, and the piston cavity of the adjustable throttle in parallel it is connected with two constant throttles, the first of which is connected through the check valve to the shock-absorbing chamber of the hydraulic cylinder, and the second if hydrochloric backbone, characterized in that for the purpose. to improve the frequency response of the device by increasing the filling speed of the piston cavity of the adjustable throttle, the device is equipped with a two-position valve _β , one input of which is common with the pressure pipe, the other with a drain line, and the output of the valve is connected to the supply line and with a second permanent throttle . SU p „1203265