| 摘要 |
<p>A rock crusher is provided that has a crusher cavity defined between a first part and a second part. The crusher includes a plurality of hydraulic cylinders mounted between the first and second parts, each of the hydraulic cylinders formed of cylinder barrels and including a base and a plurality of oil passages longitudinally extending and evenly spaced around and within the cylinder barrels, each of the oil passages including a first port accessing the interior of the hydraulic cylinder at a point remote from the cylinder base, and a second port disposed adjacent the cylinder base. A hydraulic pump may also be included, providing oil pressure to the hydraulic cylinders. A relief system is included for reducing oil pressure within the hydraulic cylinders in the event uncrushables enter the crusher cavity, the relief system including a relief valve disposed adjacent the cylinder base and in hydraulic communication with the second ports, the relief valve designed to open when hydraulic pressure in the hydraulic cylinder reaches a predetermined level, thereby reducing pressure in the hydraulic cylinder as oil pressure is dumped from the hydraulic cylinder via the oil passages.</p> |
