接力式液压启闭机空载缸动作故障原因分析与排除

大坝与安全 ›› 2023 ›› Issue (1): 26-29.

接力式液压启闭机空载缸动作故障原因分析与排除

范家庆¹，沈燕萍²

1.福州德寰流体技术有限公司，福建福州，350108； 2.中国电建集团华东勘测设计研究院有限公司，浙江杭州，311122

收稿日期:2022-09-08 出版日期:2023-02-10 发布日期:2023-04-18
作者简介:范家庆（1973—），男，安徽合肥人，高级工程师，主要从事液压系统设计工作。

Cause analysis and elimination of malfunction of no-load cylinder of relay hydraulic hoist

FAN Jiaqing and SHEN Yanping

Fuzhou Davalve Fluid Technology Co., Ltd.

Received:2022-09-08 Online:2023-02-10 Published:2023-04-18

摘要/Abstract

摘要：

水口水电站接力式液压启闭机在调试及运行过程中出现自动启闭动作中止故障，分析原因可能是带预释压液控单向阀的意外开启造成了空载缸无杆腔压力卸荷。对电液换向阀阀口及回油过滤器压降进行计算，得到液控单向阀控制口压力值，根据液控单向阀阀芯受力平衡公式，确认液控单向阀会反向开启。对此提出了解决方案：在低压工作条件下，换用不带预释压功能的液控单向阀。

关键词: 液压启闭机, 带预释压液控单向阀, 回油过滤器

Abstract:

During the debugging and operation of relay hydraulic hoist in Shuikou hydropower station, the automatic opening and closing action broke down. The reason may be that the unexpected opening of hydraulic single- direction valve with pressure pre- release function causes the pressure unloading of rodless cavity of no-load cylinder. The pressure drop at electro- hydraulic directional control valve port and oil return filter is calculated to obtain the pressure value at the control port of hydraulic single-direction valve. Base on analysis of the force on the hydraulic single-direction valve core, it is confirmed that the hydraulic single-direction valve would open in reverse direction. The solution is to reinstall the hydraulic single-direction valve without pressure pre- release under low pressure working condition.

Key words: hydraulic hoist, hydraulic single-direction valve with pressure pre-release, oil return filter

中图分类号:

TV737

范家庆, 沈燕萍. 接力式液压启闭机空载缸动作故障原因分析与排除[J]. 大坝与安全, 2023, 0(1): 26-29.

FAN Jiaqing and SHEN Yanping.

Cause analysis and elimination of malfunction of no-load cylinder of relay hydraulic hoist

[J]. Dam & Safety, 2023, 0(1): 26-29.

[1]	沈燕萍, 金晓华, 胡梦溪, 胡涛勇, 石守津. 水口电站溢洪道接力式液压启闭机改造总体设计[J]. 大坝与安全, 2020, 0(6): 36-38.
[2]	沈燕萍，金晓华，蔡锟,胡葆文，胡梦溪，王功明. 水口电站溢洪道接力式液压启闭机液压缸总成设计[J]. 大坝与安全, 2020, 0(4): 23-.
[3]	沈燕萍，金晓华，石守津，胡梦溪，王功明，陆波. 水口电站溢洪道接力式液压启闭机改造厂内试验与现场调试[J]. 大坝与安全, 2020, 0(3): 52-.
[4]	张旭阳. 二滩电厂双缸液压启闭机原理及故障分析[J]. , 2007, 0(3): 53-55.
[5]	路书礼，关赫强，林安飞. 丰满大坝溢洪系统液压启闭机的同步控制[J]. , 2003, 0(5): 55-56.