| 摘要 |
<p>Disclosed is a cylinder assembly (1) for a fluid-working machine, the assembly comprising a body (2) having a first end (3) and a second end (4) and comprising a cylinder (5), a poppet valve seat (9) and a face-sealing annular valve seat 7). The cylinder is open to the first end and configured to receive a reciprocating piston (210) and the poppet and annular valve seats extend around an axis through the cylinder. An annular valve including the annular valve seat and an annular valve member extends around the cylinder. Thus, the cylinder assembly is compact. Advantageously, the body is a continuous unitary structure which comprises all of the parts of the body which must be made of, or coated with, a hardened material. Thus the body is stronger and may be constructed with less material than has previously been possible. Additionally, the arrangement of the cylinder body facilitates manufacture, assembly and maintenance of a cylinder assembly and its insertion into the body of a fluid working machine. Further structural features of the cylinder assembly and a fluid working machine comprising one or more cylinder assemblies, are disclosed, which reduce the forces received by the cylinder body (and associated apparatus) in use, enabling the construction of smaller and lighter apparatus.</p> |
