一、調節可以是連續、無級的,也可以在液壓系統工作過程中-車地進行。
二、通過改變排量實現調速成為容積調速,這種方法和另一種所謂的節-速相比,功率損失小,避免了系統-,很適合大功率系統。
三、容積式泵剛性的壓力-流量特性對液壓傳動雖然是很-的,但是往往和流量調節的要求有矛盾,因而有-將容積式泵的原始壓力-流量特性加以改造。這就是變量調節機構的任務。
四、威格士葉片泵中推動變量機構動作的動力源及控制方式是多種多樣的,但大體上可以分層兩類:
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1、一類是由外力或外部信號對變量機構進行直接調節或控制;
2、另一類是用泵本身的流量、壓力、功率等工作參數作為信號,通過改變和控制泵的排量,實現對其流量、壓力、功率的反饋控制,進行自動調節。
海特克電磁閥6通經雙頭
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威格士葉片泵管道格局設計不合理引起漏油的六大解決方案方法
1、盡量減少管接頭的數量,便減少了威格士葉片泵漏油處。
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2、在盡量縮短威格士葉片泵管路長度的同時可減少管路壓力損失和振動等,要采取避免因溫升產生的管路熱伸長而拉斷、拉裂管路,并注意接頭部位的。
3、和軟管一樣,在靠近接頭的部位需要有一段直線部分。
4、彎曲長度要適量,不能斜交。
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5、 防止威格士葉片泵系統液壓沖擊帶來的泄漏。產生液壓沖擊時,會導致接頭螺母松動而產生漏油。
6、此時,一方面應重新擰緊接頭螺母,另一方面要找出產生液壓沖擊的原因并設法予以防止。例如設置蓄能器等吸振,采用緩沖閥等緩沖組件消振等。
7、威格士葉片泵負壓產生的泄漏。對瞬時流速大于10m/s的管路,均可能產生瞬間負壓(真空)現象,如果接頭沒有采用防止負壓產生的密封結構形式,
負壓產生時會吸走威格士葉片泵內的o形密封圈,壓力上來時因無o形密封圈而產生泄漏。
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