VICKERS威格士比例閥主要用在電氣液壓伺服系統中作為執行元件(見液壓伺服系統)。在伺服系統中,液壓執行機構同電氣及氣動執行機構相比,具有快速性好、單位重量輸出功率大、傳動平穩、抗干擾能力強等特點。另一方面,在伺服系統中傳遞信號和校正特性時多用電氣元件。因此,現代高性能的伺服系統也都采用電液方式,伺服閥就是這種系統的必需元件。
1.驅動裝置不同。
比例閥的驅動裝置是比例電磁鐵;伺服閥的驅動裝置是力馬達或力矩馬達;
美國VICKERS威格士比例閥/比例閥的使用說明
2.性能參數不同。
滯環、中位死區、頻寬、過濾精度等特性不同,
因此應用場合不同,伺服閥和伺服比例閥主要應用在閉環控制系統,
其它結構的比例閥主要應用在開環控系統及閉環速度控制系統;
2.1伺服閥中位沒有死區,比例閥有中位死區;
2.2伺服閥的頻響(響應頻率)更高,可以高達200Hz左右,比例閥-般高幾十Hz;
2.3伺服閥對液壓油液的要求更高,需要精過濾才行
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