?壓差變量泵和節流閥調速回路的工作原理 工進時，節流閥調節q1，qP與之適應 qP>q1時，pP↑，定子右移，e↓，qP↓ qP定子左移，e↑，qP↑ 直至qP=q1，v=c 差壓變量泵和節流閥調速回路的特點： 雖用了節流閥，但具有調速閥的性能，即q1不受負載變化影響 ∵定子受力平衡方程 pPA1+pP(A2-A1)=p1A2+FS ∴ △p=pP-p1=FS/A2=c 又∵ pP隨負載變化而變化，p1也變化， ∴ 它被稱為變壓積節流調速回路，又稱變壓型容積節流調速回路△qP小η高因采用固定阻尼孔，防止定子快速移動 而振動。
差壓差壓變量泵和節流閥調速回路:適用于負載變化大、速度低的中小功率系統 快速回路功用：使執行元件獲得必要的高速，以提高效率，充分利用功率 快速回路分類 雙泵供油增速 蓄能器供油增速 變量泵供油增速 液壓缸差動連接增速 液壓缸差連接快速回路工作原理 液壓缸差動連接快速回路的特點:實質性↓A以↑v，簡單易行，應用廣泛，但由于部分差動qV↑，管道和閥門應大規格。
速度換接回路功用：完成系統中執行元件依次實現幾種速度的換接實質上是一種分級（或有級）調速回路，但速度是根據需要事先調好，這是和調速回路的不同之處 速度換接回路分類： 快速與慢速的換接 兩種慢速的換接 速度換接方法 各種增速回路 電磁閥的換接回路 行程閥的換接回路 快速與慢速的換接回路舉例 1 二位二通電磁閥與調速閥 電磁閥與調速閥換接回路特點：安裝連接比較方便，易于實現自動控制，但速度換接平穩性和可靠性以及換接精度都較差。
行程閥的快慢速換接回路工作原理：液壓缸快進，壓下行程閥，液壓缸工進24S左位，液壓缸快退 行程閥的快慢速換接回路特點：速度換接平穩，動作可靠，換接精度較好，但行程閥必須安裝在液壓缸附近 兩種進給速度更換回路 1.調速閥串聯的換接回路 特點：v1>v2，否則2不起作用 2.調速閥并聯的換接回路 特點：v1、v2互不影響，但因A、B任意一個工作時，另一個減壓閥閥口最大，一旦換接易前沖。
所以改為下圖所示，可避免前沖，但△P↑ 90-L-075-MA-1-CD-60-S-3-T1-D-05-GBA-42-42-24 90L075MA1CD60S3T1D05GBA424224 90-L-075-MA-1-CD-61-S-3-S1-D-03-GBA-35-35-24 90L075MA1CD61S3S1D03GBA353524 90-L-075-MA-1-CD-80-L-3-S1-D-03-GBA-35-35-24 90L075MA1CD80L3S1D03GBA353524 90-L-075-MA-1-CD-80-L-3-S1-E-03-GBA-17-17-24 90L075MA1CD80L3S1E03GBA171724 90-L-075-MA-1-CD-80-L-3-T2-E-03-GBA-17-17-24 90L075MA1CD80L3T2E03GBA171724 90-L-075-MA-1-CD-80-P-4-S1-D-03-GBA-35-35-20 90L075MA1CD80P4S1D03GBA353520 90-L-075-MA-1-CD-80-R-3-C7-E-03-GBA-35-35-28 90L075MA1CD80R3C7E03GBA353528 90-L-075-MA-1-CD-80-R-3-S1-D-03-GBA-42-42-24 90L075MA1CD80R3S1D03GBA424224 90-L-075-MA-1-CD-80-S-3-C6-D-03-GBA-35-35-24 90L075MA1CD80S3C6D03GBA353524 90-L-075-MA-1-CD-80-S-3-C6-D-03-GBA-42-42-24 90L075MA1CD80S3C6D03GBA424224 90-L-075-MA-1-CD-80-S-3-S1-D-03-GBA-29-29-24 90L075MA1CD80S3S1D03GBA292924 90-L-075-MA-1-NN-60-D-3-S1-L-03-GBA-38-38-24 90L075MA1NN60D3S1L03GBA383824 90-L-075-MA-1-NN-60-L-3-C6-D-03-GBA-42-42-24 90L075MA1NN60L3C6D03GBA424224 90-L-075-MA-1-NN-60-L-3-C6-E-03-GBA-35-35-24 90L075MA1NN60L3C6E03GBA353524 90L075-MA-1-NN-60-L-4-C6-D-04-GBA-35-35-24 90L075MA1NN60L4C6D04GBA353524 90-L-075-MA-1-NN-60-L-4-C6-D-04-GBA-35-35-24 90L075MA1NN60L4C6D04GBA353524 90-L-075-MA-1-NN-60-L-4-S1-E-03-GBA-32-32-24 90L075MA1NN60L4S1E03GBA323224 90-L-075-MA-1-NN-60-P-3-C7-D-03-GBA-42-42-24 90L075MA1NN60P3C7D03GBA424224 90-L-075-MA-1-NN-60-R-3-S1-D-03-GBA-32-32-24 90L075MA1NN60R3S1D03GBA323224 90-L-075-MA-1-NN-60-R-4-T1-D-03-GBA-29-29-20 90L075MA1NN60R4T1D03GBA292920 90-L-075-MA-1-NN-60-S-3-C6-C-03-GBA-35-35-20 90L075MA1NN60S3C6C03GBA353520 90-L-075-MA-1-NN-60-S-3-C6-D-03-GBA-35-35-24 90L075MA1NN60S3C6D03GBA353524 90-L-075-MA-1-NN-60-S-3-C6-E-03-GBA-35-35-20 90L075MA1NN60S3C6E03GBA353520 90-L-075-MA-1-NN-60-S-3-C6-E-03-GBA-35-35-24 90L075MA1NN60S3C6E03GBA353524 90-L-075-MA-1-NN-60-S-3-C6-E-03-GBA-38-38-20 90L075MA1NN60S3C6E03GBA383820 90-L-075-MA-1-NN-60-S-3-C6-E-03-GBA-38-38-24 90L075MA1NN60S3C6E03GBA383824 90-L-075-MA-1-NN-60-S-3-C7-D-03-GBA-26-26-24 90L075MA1NN60S3C7D03GBA262624 90-L-075-MA-1-NN-60-S-3-C7-D-03-GBA-35-35-20 90L075MA1NN60S3C7D03GBA353520 90-L-075-MA-1-NN-60-S-3-C7-D-03-GBA-35-35-24 90L075MA1NN60S3C7D03GBA353524 90-L-075-MA-1-NN-60-S-3-C7-D-03-GBA-42-42-24 90L075MA1NN60S3C7D03GBA424224 90-L-075-MA-1-NN-60-S-3-C7-E-03-GBA-38-38-24 90L075MA1NN60S3C7E03GBA383824 90-L-075-MA-1-NN-60-S-3-S1-D-02-GBA-35-35-20 90L075MA1NN60S3S1D02GBA353520 90-L-075-MA-1-NN-60-S-3-S1-D-03-GBA-26-26-24 90L075MA1NN60S3S1D03GBA262624 90-L-075-MA-1-NN-60-S-3-S1-D-03-GBA-32-32-24 90L075MA1NN60S3S1D03GBA323224 90-L-075-MA-1-NN-60-S-3-S1-D-03-GBA-35-35-24 90L075MA1NN60S3S1D03GBA353524 90-L-075-MA-1-NN-60-S-3-S1-D-03-GBA-38-38-24 90L075MA1NN60S3S1D03GBA383824 90-L-075-MA-1-NN-60-S-3-S1-D-03-GBA-42-42-24 90L075MA1NN60S3S1D03GBA424224 90-L-075-MA-1-NN-60-S-3-S1-D-03-GBA-42-42-28 90L075MA1NN60S3S1D03GBA424228 90L075-MA-1-NN-60-S-3-S1-D-05-GBA-42-42-24 90L075MA1NN60S3S1D05GBA424224 90-L-075-MA-1-NN-60-S-3-S1-D-05-GBA-42-42-24 90L075MA1NN60S3S1D05GBA424224 90L075-MA-1-NN-60-S-3-S1-D-C6-GBA-42-42-24 90L075MA1NN60S3S1DC6GBA424224 90-L-075-MA-1-NN-60-S-3-S1-D-C6-GBA-42-42-24 90L075MA1NN60S3S1DC6GBA424224 90-L-075-MA-1-NN-60-S-3-S1-E-03-GBA-35-35-24 90L075MA1NN60S3S1E03GBA353524 90-L-075-MA-1-NN-60-S-3-S1-E-03-GBA-42-42-24 90L075MA1NN60S3S1E03GBA424224 90-L-075-MA-1-NN-60-S-3-T1-E-05-GBA-42-42-24 90L075MA1NN60S3T1E05GBA424224 90-L-075-MA-1-NN-60-S-4-S1-C-03-GBA-29-29-24 90L075MA1NN60S4S1C03GBA292924 90-L-075-MA-1-NN-60-S-4-S1-D-02-GBA-26-26-24 90L075MA1NN60S4S1D02GBA262624 90-L-075-MA-1-NN-60-S-4-S1-D-05-GBA-35-35-24 90L075MA1NN60S4S1D05GBA353524 90-L-075-MA-1-NN-61-S-3-C6-C-03-GBA-35-35-24 90L075MA1NN61S3C6C03GBA353524 90-L-075-MA-1-NN-61-S-3-C6-D-03-GBA-26-26-20 90L075MA1NN61S3C6D03GBA262620 90-L-075-MA-1-NN-61-S-3-C7-D-03-GBA-29-29-20 90L075MA1NN61S3C7D03GBA292920 90-L-075-MA-1-NN-61-S-3-C7-D-03-GBA-35-35-24 90L075MA1NN61S3C7D03GBA353524 90-L-075-MA-1-NN-61-S-3-S1-D-03-GBA-35-35-24 90L075MA1NN61S3S1D03GBA353524 90-L-075-MA-1-NN-80-L-3-C6-D-03-GBA-35-35-24 90L075MA1NN80L3C6D03GBA353524 90-L-075-MA-1-NN-80-L-3-C6-D-03-GBA-42-42-20 90L075MA1NN80L3C6D03GBA424220 90-L-075-MA-1-NN-80-L-3-C6-E-03-GBA-35-35-24 90L075MA1NN80L3C6E03GBA353524 90-L-075-MA-1-NN-80-L-3-C6-E-03-GBA-42-42-20 90L075MA1NN80L3C6E03GBA424220 90-L-075-MA-1-NN-80-L-3-C7-D-09-GBA-42-42-20 90L075MA1NN80L3C7D09GBA424220 90L075-MA-1-NN-80-L-3-C7-D-09-GBA-42-42-22 90L075MA1NN80L3C7D09GBA424222 90-L-075-MA-1-NN-80-L-3-C7-D-09-GBA-42-42-22 90L075MA1NN80L3C7D09GBA424222 90-L-075-MA-1-NN-80-L-3-S1-D-03-GBA-35-35-24 90L075MA1NN80L3S1D03GBA353524 90-L-075-MA-1-NN-80-L-3-S1-E-03-GBA-32-32-24 90L075MA1NN80L3S1E03GBA323224 90L075-MA-1-NN-80-P-3-C6-C-09-GBA-36-36-20 90L075MA1NN80P3C6C09GBA363620 90-L-075-MA-1-NN-80-P-3-C6-C-09-GBA-36-36-20 90L075MA1NN80P3C6C09GBA363620 90L075-MA-1-NN-80-P-3-C7-D-09-GBA-45-45-20 90L075MA1NN80P3C7D09GBA454520 90-L-075-MA-1-NN-80-P-3-C7-D-09-GBA-45-45-20 90L075MA1NN80P3C7D09GBA454520 90-L-075-MA-1-NN-80-P-3-S1-D-03-GBA-23-23-24 90L075MA1NN80P3S1D03GBA232324 90-L-075-MA-1-NN-80-P-4-S1-E-03-GBA-23-23-24 90L075MA1NN80P4S1E03GBA232324 90-L-075-MA-1-NN-80-P-4-S1-E-03-GBA-35-35-20 90L075MA1NN80P4S1E03GBA353520 90-L-075-MA-1-NN-80-P-4-S1-E-03-GBA-42-42-24 90L075MA1NN80P4S1E03GBA424224 90-L-075-MA-1-NN-80-R-3-C6-D-03-GBA-23-23-24 90L075MA1NN80R3C6D03GBA232324 90-L-075-MA-1-NN-80-R-3-C7-E-03-GBA-26-26-28 90L075MA1NN80R3C7E03GBA262628 90-L-075-MA-1-NN-80-R-3-S1-D-03-GBA-23-23-24 90L075MA1NN80R3S1D03GBA232324 90-L-075-MA-1-NN-80-S-3-C6-D-03-GBA-35-35-24 90L075MA1NN80S3C6D03GBA353524 90-L-075-MA-1-NN-80-S-3-C6-D-03-GBA-42-42-24 90L075MA1NN80S3C6D03GBA424224。
