| 摘要 |
A crusher for crushing mineral material, a method for decreasing give in a crusher and a mineral material processing plant. The crusher comprises a movable and a fixed crushing element arranged to receive a force. The crusher further comprises a hydraulic cylinder (9) and a piston (316) inside the hydraulic cylinder and a piston rod (318) attached to the piston which extends through a first end of the hydraulic cylinder and is connected to the movable crushing element. The hydraulic cylinder has a first space (314) around the part of the piston rod (318) in the hydraulic cylinder and a second space (312) limited by the first space (314) and the piston (316). The crusher further comprises a valve (570) and a hydraulic fluid connection from the valve (570) to the first space (314). The valve (570) is configured to enable a flow of hydraulic fluid into the first space (314) in response only to the piston (316) moving in the hydraulic cylinder (9) towards the second space (312) due to said force. |
