REXROTH力士樂溢流閥$博世力士樂液壓元件力士樂開始在中國的業務于1978年,現已成立了五家公司。憑借*的產品和豐富的應用經驗,力士樂為中國客戶提供現代高效和靈活完整的解決方案。中國在2005年已經成為了力士樂的第三大機構,僅次于德國和美國。
力士樂溢流閥是一種液壓壓力控制閥。在液壓設備中主要起定壓溢流作用,穩壓,系統卸荷和安全保護作用。
力士樂溢流閥的定壓溢流作用:在定量泵節流調節系統中,定量泵提供的是恒定流量。當系統壓力增大時,會使流量需求減小。此時溢流閥開啟,使多余流量溢回油箱,保證溢流閥進口壓力,即泵出口壓力恒定(閥口常隨壓力波動開啟)。
力士樂溢流閥的穩壓作用:溢流閥串聯在回油路上,溢流閥產生背壓運動部件平穩性增加。
力士樂溢流閥的系統卸荷作用:在溢流閥的遙控口串接溢小流量的電磁閥,當電磁鐵通電時,溢流閥的遙控口通油箱,此時液壓泵卸荷。溢流閥此時作為卸荷閥使用。
力士樂溢流閥的安全保護作用:系統正常工作時,閥門關閉。只有負載超過規定的極限(系統壓力超過調定壓力)時開啟溢流,進行過載保護,使系統壓力不再增加(通常使溢流閥的調定壓力比系統zui高工作壓力高10%~20%)。
力士樂溢流閥在實際應用中一般有:作卸荷閥用,作遠程調壓閥,作高低壓多級控制閥,作順序閥,用于產生背壓(串在回油路上)。
力士樂溢流閥一般有兩種結構:1、直動型溢流閥 。2、先導型溢流閥。 對溢流閥的主要要求:調壓范圍大,調壓偏差小,壓力振擺小,動作靈敏,過載能力大,噪聲小。
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