Cone Crusher Mantle Core Assembly Friction and Leakage Control
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Solution Overview
Problem
Cone-shaped crushers face issues with surface damage due to sliding friction between the mantle core and main shaft, hydraulic fluid leakage, influx of foreign matter, and mechanical friction, which reduce their service life and efficiency.
Innovation Solution
The design incorporates a mantle core assembly with a piston unit and annular cylinder for hydraulic oil control, seal members to prevent leakage, dust seal sleeves to block foreign matter, and a tire-shaped sealer with lubricant to minimize friction and wear, eliminating the need for a key and key groove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the crusher head and main shaft are designed with a gap to allow relative rotational movement, then the crushing operation can proceed, but sliding friction occurs destroying the surfaces
Solution Approach 1:
A lubricious liner is introduced as an intermediary component between the crusher head and main shaft. This liner prevents direct metal-to-metal contact, eliminating sliding friction that destroys surfaces while allowing the necessary relative rotational movement for crushing to continue.
Solution Approach 2:
The friction characteristics of the interface between crusher head and main shaft are changed by coating with lubricious material or installing a lubricious liner. This changes the surface properties from high friction (metal-to-metal) to low friction (lubricated surface), preventing surface destruction.
2Reliability
If a lubricious liner is installed on the crusher head, then surface damage is alleviated, but the liner is subject to gradual wear and requires replacement
Solution Approach 1:
The design allows the crusher head to move up and down along the main shaft, creating a dynamic adjustment mechanism. This movement can help distribute wear more evenly across the liner surface and allows for maintenance access without complete disassembly.
Solution Approach 2:
The lubricious liner is designed as a replaceable, relatively inexpensive component that protects the expensive crusher head and main shaft. When the liner wears out, it is replaced rather than replacing the entire crushing mechanism.
3Adaptability or versatility
If the crusher head is moved up and down by hydraulic fluid injection, then the crushing gap is adjustable, but hydraulic fluid leakage occurs due to broken hydraulic seal
Solution Approach 1:
A seal member is introduced as an intermediary between the moving crusher head and stationary hydraulic components. This seal member prevents hydraulic fluid leakage while allowing the crusher head to move for gap adjustment.
Solution Approach 2:
A flexible seal member is used to prevent hydraulic fluid leakage in the movable joint between the crusher head and main shaft. The flexibility of the seal allows it to accommodate movement while maintaining the hydraulic seal.
4Ease of operation
If a gap is present between the crusher head and main shaft, then the crusher head can move along the main shaft, but foreign matter enters the gap
Solution Approach 1:
A dust seal sleeve is used to block foreign matter from entering the gap between the crusher head and main shaft. The dust seal allows the crusher head to move while preventing dust and debris from contaminating the hydraulic system.
Solution Approach 2:
A dust seal sleeve is introduced as an intermediary component that blocks foreign matter from entering the gap between the moving crusher head and main shaft, while still allowing the necessary movement for operation.
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 configuration reduces the risk of surface damage, minimizes hydraulic fluid leakage, prevents foreign matter ingress, and significantly lowers mechanical friction, leading to a longer service life and improved operational efficiency of the cone-shaped crusher.
Implementation Method 1
a piston unit configured to be in a fixed relative position with respect to the mantle core assembly, formed at the lower portion of the mantle core assembly, inserted in the cylinder, and movable up and down by the pressure of hydraulic oil flowing in and out of internal space of the cylinder
Implementation Method 2
seal members provided on the outer peripheral surface and on the inner peripheral surface of the lower end of the piston unit to prevent leakage of hydraulic oil
Implementation Method 3
a tire-shaped sealer having an upper inner diameter portion in contact with the outer circumferential surface of the main shaft and a lower inner diameter portion fixed to the upper end of the mantle core assembly, wherein lubricant is provided in a space defined by the tire-shaped sealer and the main shaft
Data Source
AI summary
The present disclosure relates to a cone-shaped crusher. The cone-shaped crusher includes a main shaft, a mantle core assembly which is coupled to and movable up and down the main shaft, and a crushing gap control support positioned below the mantle core assembly and fixed to the main shaft. In addition, the crushing gap control support has an annular cylindrical unit extending upward therefrom and receiving a piston unit which extends downward from the mantle core assembly so that the piston unit is movable up and down in the cylindrical unit. The whole mantle core assembly formed with the piston unit moves up and down by a pressure of hydraulic oil flowing in and out of an internal space of the cylindrical unit.