汽车起重机起升机构平衡阀的比较

起升机构是汽车起重机上技术含量高、性能要求高、配置部件复杂的关键装置。机构中的多路阀、卷扬机、卷扬制动控制阀及起升高速液压马达与起升平衡阀要相互匹配适中，做到重载下落平稳无抖动。平衡阀要具有零泄漏、较高的灵敏度及载荷起落过程中的任意位置停止时闭锁迅速等主要性能，以保障闭锁吊起的载荷无下沉。介绍国内QY8-QY300型汽车起重机起升机构普遍使用的4大类型平衡阀及其结构和技术特征，并加以对比分析。

Comparison of Balance Valves for Hoisting Mechanism of Truck Cranes

Hoisting mechanism is the key device with high technical contents, high performance requirements and complex configuration on a truck crane. In the mechanism, multi-way valve, winch, braking control valve of winch as well as high speed hoisting hydraulic motor should be properly matched to hoisting balance valve to realize stable lowering of heavy loads. The balance valve should feature functions of zero leakage, higher sensitivity and prompt locking when the load stops at any positions during hoisting and ...