What happens when air enters the hydraulic system of a hydraulic cone crusher

During operation, hydraulic cone crushers must prevent air ingress into the hydraulic system.

1. Effects of air entering the hydraulic system:

Air entering the hydraulic system causes the hydraulic oil in the cone crusher to “emulsify,” degrading the oil's performance. The volume of air trapped within the oil fluctuates with system pressure and crusher temperature, obstructing fluid flow. This causes hydraulic actuators to exhibit erratic stopping and starting, slow speeds, and insufficient force during operation.

2. Solutions:

(1) Ensure no air leaks at points below atmospheric pressure, such as suction lines and pump drive shaft seals.

(2) Prevent air ingress through the return line by ensuring the return pipe remains submerged below the oil tank surface.

(3) If air has entered the system, promptly locate and eliminate leaks. Purge all trapped air from the system.

(4) After adding new oil, continuously operate the working equipment through lifting, lowering, and tilting cycles to expel residual air from the system.

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