Variable pressure hydraulic spacing adjusting device

Abstract

The invention discloses a variable pressure hydraulic spacing adjusting device which comprises a connecting sleeve, a stand, a connecting plate and a hydraulic spacing adjusting control system, wherein the hydraulic spacing adjusting control system comprises two hydraulic cylinders, a displacement sensor, a proportion integration differentiation (PID) controller, a pressure overflow valve and an oil filter. The invention replaces the mechanical drive spacing adjusting device by using the hydraulic cylinders, and improves the roll spacing control precision and the safe protection pressure precision of an open mill spacing setting system through the drive and the control of the hydraulic systems.

Description

technical field [0001] The invention relates to a distance adjusting device for adjusting the size of the roll gap on an open mill, in particular to a variable pressure hydraulic distance adjusting device. Background technique [0002] The open mill is one of the most commonly used basic equipment for the processing of rubber and plastic products. The distance adjustment device of the open mill is used to adjust the distance between the two rollers of the open mill, so that the open mill can operate under different roller distances. Work together with the safety device to form the safety protection device of the mill to prevent damage to key components such as rollers, racks, and bearings due to roller overload. [0003] The original distance adjustment device of the mill adopts mechanical combination structures such as motor, reducer, worm gear-worm, screw-nut, etc., and the safety protection adopts gray cast iron safety plates. This structure generally has the following pr...

AI Technical Summary

Problems solved by technology

[0004] 1. The large inertia of the mechanical transmission makes it difficult to accurately position the roller distance during the adjustment process

[0005] 2. Due to the difference in the output speed of the motor and the existence of mechanical transmission gaps, the synchronization of the roller spacing on both sides of the roller is poor during adjustment.

[0006] 3. Due to the large gap between the distance adjustment device and the safety device, which cannot be eliminated, there is an empty stroke of about 3mm during the distance adjustment process, and there is no display on the dial, so that the displayed scale is different from the actual roller distance. There is a large deviation

[0007] 4. The adjustable range of the distance adjustment speed is small, which does not meet the CE safety standard and affects the sales to users who implement the CE standard.

[0008] 5. The protection pressure value of the safety plate of gray cast iron is a discrete value, usually the deviation range is about ±100kN, which cannot realize the precise protection of the equipment

[0009] 6. After the safety sheet is broken, the replacement time is longer and the work intensity is greater, which affects the continuity of work

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