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    • 112. 发明公开
    • 유압 장치의 하류에 연결된 냉각기를 위한 바이 패스 밸브
    • 用于液压单元冷凝器连接管道的旁路阀
    • KR1020090042805A
    • 2009-04-30
    • KR1020097003589
    • 2007-07-30
    • 젯트에프 프리드리히스하펜 아게
    • 마르틴한스-요아힘프릿쳐안톤
    • F28F27/02F01M5/00F01P7/16
    • F28F27/02C08L2201/12F01M5/007F01P2070/02F16H57/0413F16K31/002F28D2021/0089F28F2250/06F28F2255/04
    • The invention relates to a bypass valve for a cooler connected downstream of a hydraulic unit, comprising a valve housing (2) with connection openings (8, 12, 18) for a connection to the hydraulic unit at one side and to the cooler at the other side, a closure element (22) which is arranged in the valve housing and which closes or opens a bypass, a valve spring (32) which presses the closure element (22) into the closed position, and thermosensitive means which bring about an opening of the closure element (22) at a temperature of the hydraulic fluid below a predefined threshold temperature (approximately 80°C). It is provided according to the invention that the thermosensitive means are formed by the valve spring (32) itself, which valve spring (32) is for this purpose formed from a memory metal alloy, with a transition point which is at the threshold temperature, in such a way that said valve spring (32) exerts no force below said threshold temperature and permits an opening of the closure element (22) under the action of the hydraulic fluid pressure. In this way, separate thermosensitive means, for example a temperature-controlled actuating drive, can be dispensed with.
    • 本发明涉及一种用于连接在液压单元下游的冷却器的旁通阀,该旁通阀包括具有连接开口(8,12,18)的阀壳体(2),用于连接到一侧的液压单元和在一侧的冷却器 另一侧,布置在阀壳体中并关闭或打开旁路的封闭元件(22),将封闭元件(22)压入关闭位置的阀弹簧(32)以及带有 在液压流体的温度低于预定阈值温度(大约80℃)下打开封闭元件(22)。 根据本发明,提供热敏装置由阀弹簧(32)本身形成,该阀弹簧(32)为此由存储金属合金形成的阀弹簧(32),其转变点处于阈值温度, 使得所述阀弹簧(32)不施加低于所述阈值温度的力并且允许在液压流体压力的作用下打开所述封闭元件(22)。 以这种方式,可以省略分离的热敏装置,例如温度控制的致动驱动装置。