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发明公开
CN103109091A 螺杆式压缩机 有权

螺杆式压缩机
摘要：
在螺杆式压缩机(1)中设置有用来改变压缩比的滑阀(60)。在滑阀(60)的阀体部(65)上沿着阀体部(65)的后端面(74)形成有密封用凸部(66)。在机壳(10)的滑阀收纳部(31)中滑阀(60)的密封用凸部(66)与机壳(10)的滑动接触用曲面(32)滑动接触，从而将低压空间(S1)和高压空间(S2)分隔开。在阀体部(65)，低压空间(S1)内的制冷剂压力总是作用于整个非滑动接触面(77)上。为此，不论滑阀(60)的位置如何变化，将阀体部(65)推向螺杆转子(40)一侧的力都是一定的，因而阀体部(65)的前表面(71)和螺杆转子(40)之间的间隙的变化幅度减小。
摘要（英）：

A screw compressor (1) is provided with a slide valve (60) for changing the compression ratio. A sealing protrusion section (66) is formed on the valve element section (65) of the slide valve (60) so as to extend along the rear end surface (74) of the valve element section (65). In the slide valve containing section (31) of the casing (10), the sealing protrusion section (66) of the slide valve (60) is in sliding contact with the sliding contact curved surface (32) of the casing (10) to separate a low-pressure space (S1) and a high-pressure space (S2). The refrigerant pressure within the low-pressure space (S1) always acts on the entire non-contact surface (77) of the valve element section (65). This causes a force which presses the valve element section (65) toward the screw rotor (40) to be constant irrespective of the position of the slide valve (60), and as a result, a variation in the clearance between the front face (71) of the valve element section (65) and the screw rotor (40) is reduced.

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