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发明授权
CN104712511B 液压旋转机械及具备该液压旋转机械的工程机械 有权

液压旋转机械及具备该液压旋转机械的工程机械
摘要：
本发明提供能够减少伴随液压缸体的旋转的转矩损失的液压旋转机械及工程机械。液压旋转机械具备：与旋转轴连动地旋转的液压缸体；分别容纳在该液压缸体的多个液压缸内的多个活塞；以及与液压缸体的一端面滑动接触的阀片(16)，该阀片包括：在与多个液压缸之间连通并对低压侧的工作油进行供给或排出的低压端口；沿着旋转轴的周向形成为规定角度(26A)的范围内的圆弧状，并在与多个液压缸之间连通而对高压侧的工作油进行供给和排出的高压端口；与液压缸体滑动接触，并对来自低压端口及高压端口的工作油进行密封的密封挡圈部；以及设置在该密封挡圈部的周围之中沿着旋转轴的周向的规定角度的范围(26B)内，并与液压缸体滑动接触的衬垫(30)。
摘要（英）：

Disclosed is hydraulic rotating equipment provided with a rotating shaft, a cylinder block including a plurality of cylinders, a like plurality of pistons accommodated in the cylinders, respectively, and a valve plate maintained in slide contact with a rear end surface of the cylinder block. The valve plate includes a low-pressure port communicable with the cylinders, a high-pressure port formed in an arcuate shape over a predetermined angle along a circumferential direction of the rotating shaft and communicable with the cylinders, a seal land maintained in slide contact with the rear end surface, and a sliding contact member arranged on a periphery of the seal land in a range of the predetermined angle along the circumferential direction of the rotating shaft and maintained in slide contact with the rear end surface. A working machine provided with the hydraulic rotating equipment is also disclosed.

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