Hydraulic Drive Mechanism for Crusher Gap Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing crusher technologies face challenges in adjusting the movement path of the shaft and the crushing gap size, leading to cumbersome maintenance and excessive vibrations due to eccentric members and unbalanced mass drives, and suffer from frictional wearing and inefficiencies in hydraulic drives.
Innovation Solution
A hydraulic drive mechanism with telescopic drive units arranged radially around the crusher shaft, featuring a cam with a spherically domed surface and reaction seats, allowing for three-dimensional movement and orthogonal force application, which reduces friction and enables adjustable crushing gap sizes through hydraulic fluid control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an eccentric member is used to cause movement of the crushing head, then the crushing head can be moved along a predefined path, but it becomes cumbersome to change the predefined path of movement and difficult to adjust the minimum size of the crushing gap
Solution Approach 1:
The patent replaces the fixed eccentric member with a dynamic hydraulic drive system that can actively adjust the movement path and crushing gap size. The hydraulic cylinders connected to the spherical cam mechanism enable real-time modification of the drive parameters without physical dismantling, transforming a static mechanism into a dynamically adjustable one.
Solution Approach 2:
The invention introduces a hydraulic drive system with multiple hydraulic cylinders that actuate the spherical cam mechanism. This hydraulic system replaces the mechanical eccentric drive, allowing flexible adjustment of the crushing gap and movement path through hydraulic pressure control, thereby improving ease of operation while maintaining manageable device complexity.
2Adaptability or versatility
If an unbalanced mass is rotated to cause the crushing head to gyrate, then the gyration path can be selectively changed, but excessive vibrations are generated leading to increased wearing of parts
Solution Approach 1:
The patent replaces the mechanical unbalanced mass rotation system with a hydraulic drive mechanism actuating a spherical cam. This substitution eliminates the need for rotating unbalanced masses, thereby removing the source of excessive vibrations while maintaining the capability to selectively change the gyration path through hydraulic control of the cam mechanism.
Solution Approach 2:
The spherical cam mechanism acts as an intermediary between the hydraulic drive system and the crushing head. It translates the linear motion of hydraulic cylinders into the desired gyratory motion of the crushing head, achieving selectable gyration paths without directly rotating unbalanced masses, thus reducing harmful vibrations.
3Productivity
If hydraulic lifting units with piston-cylinder units are used to lift the crushing head, then the crushing head can be moved, but excessive frictional wearing occurs between the pistons and pressure ring
Solution Approach 1:
The patent employs a spherical cam mechanism with curved surfaces instead of flat piston-cylinder contacts. The spherical geometry distributes the contact loads over larger areas and reduces concentrated friction points, thereby maintaining the lifting capability while significantly reducing frictional wearing between moving parts.
Solution Approach 2:
The invention changes the contact parameters from linear piston-cylinder sliding to spherical surface contact. This parameter change in the contact geometry reduces the friction coefficient and wear rate, improving reliability while preserving the hydraulic lifting units' productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for efficient adjustment of the crushing gap and movement path without dismantling the crusher, reduces vibrations and wear, and maintains orthogonal force application for improved efficiency and reduced maintenance.
Implementation Method 1
Each drive unit has a telescopic body having a bore extending therethrough, the bore having opposed open ends and being configured to receive and exhaust a variable volume of hydraulic fluid. During use, the hydraulic fluid in the bore is configured to contact directly against and apply a force directly onto the cam and the reaction seat.
Implementation Method 2
The cam may be integrally formed with the shaft and have a spherically domed convex surface. Each drive unit may slide over the cam and its reaction seat to permit changes in the angular orientation of the drive unit within the housing so that the drive unit remains longitudinally aligned between the cam and its reaction seat.
Implementation Method 3
The inner leg is configured to discharge a portion of the hydraulic fluid from the bore to thereby apply a lubricating film on the cam and the reaction seat respectively.
Data Source
AI summary
There is disclosed a crusher for crushing material into finer particulates. The crusher includes a housing enclosing a cone assembly comprising a crushing head mounted on a shaft. The housing supports an outer crushing shell, while the crushing head supports an inner crushing shell. The two crushing shells cooperate to form a crushing gap therebetween. A cam is provided on the shaft with the cam being located remote from the crushing head. A number of drive units extend between the cam and the housing, wherein each drive unit has a first end movably abutting the cam and a second end movably abutting a discrete spherically domed reaction seat provided on the housing. Each drive unit is a telescopic body with a bore extending therethrough so that hydraulic fluid injected into each bore applies a drive force onto the cam and the reaction seat to cause movement of the crushing head.