SU1380777A1 - Shock absorber for roller mill - Google Patents

Abstract

This invention relates to shock absorber designs for roller mills with movable and stationary rollers. The purpose of the invention is to increase operational reliability. The shock absorber contains hydraulic cylinders 1 with twin pistons 3, an accumulator made in the form of a block of 8 springs fixed at the ends of the piston rods 2. The internal cavity of the hydraulic cylinders is divided by a partition 4, which is equipped with a hydraulic regulator 7 and calibrated holes 6. When an uncrushable material enters the rolls, the movable roller is quickly discharged, the uninterruptible material passes freely and returns smoothly to its original position. 1 il. (L

Description

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The invention relates to roller mills used in chemical, construction and mining industries.

The aim of the invention is to increase operational reliability.

The drawing schematically shows a shock absorber for a roller mill.

The size of an unbreakable object that can fall between the rollers is equal to the size of the original product; in addition, there is a stock of movement of the pistons and compression of the springs, which are regulated within the required limits.

Hydraulic shock absorber works according to the law agreed with

The shock absorber has two hydraulic cylinders with a linear speed of rolls, - waste

1. A hydraulic cylinder consists of a piston rod 2, a twin piston 3 with fluid in its interpiston space, partitions 4 with overflow holes 5 and calibrated holes 6, a pedal regulator 7, a spring 8, a bolt 9.

When an indestructible object falls between the rollers, the movable roller departs and the rod 2 connected to it with twin pistons 3 is set in motion. Under hydraulic pressure, hydraulic regulators 7 instantly open 1Тс and liquid through overflow orifices 5 and calibrated to divert 6 quickly passes into the lower cavities of hydraulic cylinders 1. Pistons with their lower end compress the springs 8 by an amount equal to the size of an inducible object. Thus, the movable roller moves away and passes an unbreakable object. Thereafter, the springs 8 expand, press the twin pistons 3, which press against the fluid. Under hydraulic pressure, the hydraulic regulators 7 close, blocking the openings 5, and the liquid overflows only through the calibrated openings 6. The double pistons 3, the rods 2 return, which return the movable shaft to the initial position, and the mill and grinding continue without adjustment and adjustment. material.

In order for the movable roller to be held at a predetermined distance from the stationary in the non-working position or during grinding of the material, the springs 8 are compressed to the desired size with the bolts 9. This creates such a force that the movable roller can neither vibrate nor move away during grinding material. The springs 8 have a certain amount of compression, but they can be compressed to this size only while the product falls between the rolls.

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When an inadmissible object hits and creates pressure on the moving roller, which provides grinding, - the initial product.

An indestructible object passes between the rollers for a certain time t, for the same time the roller must move back a certain distance 1, the same time and the same distance should move the twin pistons of the hydraulic cylinders, the liquid overflow through the overflow and calibrated openings of the transverse partitions from the upper compartments in the lower, for the same time t and for the same distance 1 the springs should be compressed. When the non-durable object passes between the rollers, the springs, having opened, must return the movable roller to its original position, but already for a longer time, since the overflow holes are closed by hydraulic regulators and the liquid will overflow only through the calibrated holes.

The previously known hydropneumatic shock absorbers did not spread because of the complexity of the design, bulkiness and laboriousness of manufacture.

The operation of roller mills with mechanical shock absorbers is associated with frequent repairs, the need to replace bearings.

The use of hydraulic shock absorbers eliminates the shortcomings of those and other shock absorbers, will increase the reliability of roller mills.

Claims (1)

Invention Formula A shock absorber for a roller mill with moving and stationary rolls containing hydraulic cylinders with pistons and an accumulator, characterized in that, in order to increase operational reliability, the pistons of hydraulic cylinders are made to be connected (5 inlets with a cavity between them to the cat (1 313807774 a transverse partition is mounted, the battery is made in the form of a spring, having calibrated holes and fixed on the bottom end of each hydraulic regulator, in this case of pistons.