Hydraulic Socket Removal System for Gyrational Crusher Main Shaft
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Solution Overview
Problem
The current method for removing a socket from the main shaft of a cone crusher is labor-intensive and time-consuming, requiring heating and the use of jack screws, which can damage the components and necessitate experienced personnel, due to the thermal expansion and scoring of contact surfaces.
Innovation Solution
A hydraulic separation system utilizing pressurized hydraulic fluid and hydraulic grooves, along with tapered contact surfaces, to create separation between the socket and the main shaft, facilitating quicker and safer disassembly during maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating and jack screws are used to remove the socket, then the socket can be separated from the main shaft, but the process becomes labor-intensive and time-consuming
Solution Approach 1:
The patent replaces the traditional mechanical removal system (heating equipment and jack screws) with a hydraulic system. Hydraulic cylinders with pistons are positioned between the socket and main shaft, and hydraulic fluid pressure directly pushes the socket off the main shaft, eliminating the need for thermal expansion and manual jacking operations.
Solution Approach 2:
The patent introduces a hydraulic removal system that uses hydraulic fluid under pressure to generate the force needed for socket separation. Hydraulic cylinders convert fluid pressure into linear motion of pistons, which push the socket away from the main shaft in a controlled and rapid manner, significantly reducing disassembly time and labor requirements.
2Reliability
If heating is applied to create clearance, then the socket expands and separation becomes possible, but heat transfers to the main shaft causing expansion and loss of clearance
Solution Approach 1:
The patent eliminates the heating process entirely by replacing it with a direct hydraulic pushing mechanism. Hydraulic cylinders generate sufficient force to push the socket off the main shaft without thermal expansion, preventing heat transfer to the main shaft and avoiding the problem of thermal expansion causing loss of clearance.
3Reliability
If jack screws are used to push the socket off, then separation is achieved, but the contact surface becomes scored decreasing component life
Solution Approach 1:
The patent replaces the jack screw mechanism with hydraulic cylinders that have large surface area contact between the piston and the socket. This distributed contact prevents scoring of the contact surface, as the hydraulic piston applies force over a broad area rather than through a small screw contact point, thereby preserving component life.
4Reliability
If the socket removal process is delayed, then heat transfers to the main shaft, but repeating the process increases time and labor requirements
Solution Approach 1:
The hydraulic removal system achieves socket separation in a single, rapid operation without the need for repeated heating and jacking cycles. The hydraulic cylinders can quickly generate the necessary force to push the socket off the main shaft, eliminating the iterative process required by traditional methods and significantly reducing total removal time.
Data Source
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AI summary
A hydraulic separation system for use in a gyrational crusher to separate a socket (50) of the crusher from a main shaft (34). The hydraulic separation system includes one or more hydraulic grooves (64,66) formed at the interference contact area between the socket and the main shaft Each hydraulic groove is fed with a supply of pressurized hydraulic fluid to aid in separation of the socket from the main shaft. An inner contact surface (78) of the socket is tapered and engages a tapered outer surface (92) of the main shaft. The mating tapered surfaces further aid in separation of the socket from the main shaft upon application of the pressurized hydraulic fluid.