Solutions for Gear Wear in Cone Crushers

Although hydraulic cone crushers rarely experience iron jamming, they suffer from severe wear and gear tooth damage, including root cutting of the bevel gears, which prevents normal operation.

Before modification, hydraulic cone crushers required frequent maintenance with extended downtime. Typically, maintenance was needed every 15 days (as short as half a month), with each session lasting nearly 24 hours or longer. When severe root cutting of the bevel gear occurred, externally procured replacement gears were required, further prolonging maintenance time.

A. Implemented Measures

Current industry solutions for addressing tooth breakage and wear in hydraulic cone crushers typically include material upgrades or hard alloy overlay welding. Based on cone crusher principles, prior investigations into equipment failure causes, and the specific conditions of the iron slag production line, the following modifications were implemented:

① For slag material fed into the cone crusher, which previously only underwent iron removal at the belt head pulley, a permanent magnet suspended iron removal device has been added to the conveyor belt feeding the slag into the cone crusher. This dual-stage iron removal effectively prevents slag iron from entering the cone crusher.

② The current setting of the cone crusher's protection device has been adjusted to prevent forced startup under heavy load conditions or instantaneous protection tripping.

③ Monthly inspection of metal content within the hydraulic oil tank.

④ Refine operating procedures, strengthen supervision and assessment of iron contamination in the cone crusher, and enhance joint liability evaluations for production line supervisors and operators.

B. Operational Outcomes

Post-modification, the cone crusher operates smoothly with minimal wear on the cone liner surface. Material jams and lockups have been significantly reduced, with no instances of cone liner root cutting occurring, thereby extending maintenance intervals.

1) Reduced routine maintenance frequency and costs

Post-modification, maintenance intervals now reach 90 days (extending up to 150 days). Cone crusher maintenance aligns with other production line equipment schedules. Each maintenance session requires only 4-6 hours, primarily involving lubrication, tightening checks, and routine inspections.

2) Extended hydraulic cone crusher lifespan

The original online service life of the HPY500 hydraulic cone crusher's umbrella-shaped teeth was approximately 700 days. Post-improvement, based on nearly one year of operational performance, the service life without removal is projected to exceed three years. After modification, the gears of the umbrella-shaped teeth remain largely intact, and the cone crusher's performance remains excellent. This fundamentally resolves the issue of root cutting in the umbrella-shaped teeth, significantly reducing equipment procurement costs.

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