| 摘要 |
PURPOSE: A pressure compensator of a hydraulic device is provided to immediately compensate the increase and decrease of pressure by the volume change of hydraulic fluid according to temperature change. CONSTITUTION: A pressure compensator of a hydraulic device comprises a hydraulic machinery tool(10), a compensation chamber(20), a first plunger(30), a second plunger(40), a complex spring(50) and a pressure controller(60). The hydraulic machinery tool comprises a hydraulic feeding port(11). The compensation chamber comprises a hydraulic passage and a plunger operating unit. The hydraulic passage and plunger operating unit are successively formed in multi-stages. The first plunger is inserted to the plunger operating unit. The complex spring is inserted between the first plunger and the second plunger. The pressure wicket prevents the displacement of the second plunger. |
