?基本回路定義:由有關(guān)液壓元件組成，并能完成某一特定功能的典型（簡單）油路結(jié)構(gòu) 基本回路分類: 按功用分:方向控制回路、壓力控制回路、速度控制回路、多缸工作控制回路 速度控制回路功能:改變執(zhí)行元件的速度 速度控制回路分類：調(diào)速、換速、增速回路等 調(diào)速回路調(diào)速原理 液壓缸：v=q/A 液壓馬達(dá)：n=q/Vm 由上兩式知： 改變q、Vm、A，皆可改變v或n，一般A是不可改變的。
液壓缸：改變q，即可改變v；液壓馬達(dá)：既可改變q，又可改變Vm 調(diào)速回路調(diào)速方法 節(jié)流調(diào)速——改變q 容積調(diào)速——改變泵和馬達(dá)的V 容積節(jié)流調(diào)速——既可改變q，又可改變V 對調(diào)速回路的要求 調(diào)速范圍大，速度穩(wěn)定性好，效率高 節(jié)流調(diào)速回路組成：定量泵、流量閥、溢流閥、執(zhí)行元件等。
節(jié)流調(diào)速回路的工作原理：通過改變流量控制閥口的流量面積，控制執(zhí)行器的流量，調(diào)整其運(yùn)動速度 節(jié)流調(diào)速回路分類 按采用流量閥不同 分為節(jié)流閥節(jié)流調(diào)速、調(diào)速閥節(jié)流調(diào)速、 按流量閥安裝位置不同分為進(jìn)油路、回油路、旁油路 節(jié)流閥進(jìn)口節(jié)流調(diào)速回路的特點(diǎn)：在步入液壓缸油的路上串聯(lián)節(jié)流閥，即在泵與缸之間串聯(lián)，調(diào)整a節(jié)，可改變q，改變速度，必須與溢流閥一起使用。
節(jié)流閥進(jìn)口 qp：節(jié)流閥 → 液壓缸，溢流閥 → 油箱 節(jié)流閥進(jìn)口節(jié)流速度回路工作特點(diǎn)分析 1）速度負(fù)載特性 2）最大承載能力 3)功率和效率 速度負(fù)載特性 液壓缸穩(wěn)定工作時(shí)的受力平衡方程 p1A=F+p2A ∵ p2→T pp=pS=C ∴ p2=0 p1=F/A 故 節(jié)流閥兩端的壓力差為 △p=pP-p1=pP-F/A 通過節(jié)流閥進(jìn)入液壓缸的流量為： φ φ q1=CAT△p=CAT（PP-F/A） 液壓缸的運(yùn)動速度 φ v=q1/A=CAT(pP-F/A)/A 結(jié)論：v∝AT 改變 AT，即可改變 q1 改變v。
A T 調(diào)定，v隨F變化而變化 速度負(fù)載特性結(jié)論 ① AT=C,F↑,v↓ ∴ 速度負(fù)載特性軟，即輕載時(shí)剛性好 ② F=C,AT越小，v剛性越好，即低速時(shí)剛性好 最大承載能力 ∵PP=pS=C， ∴不論AT如何變化，其最大承載能力 不變即Fmax=p P AT 故 稱為恒推力調(diào)速（或恒轉(zhuǎn)矩調(diào)速） 90-L-075-MA-1-NN-80-S-3-C6-E-03-GBA-42-42-24 90L075MA1NN80S3C6E03GBA424224 90-L-075-MA-1-NN-80-S-3-C7-D-03-GBA-35-35-24 90L075MA1NN80S3C7D03GBA353524 90-L-075-MA-1-NN-80-S-3-C7-D-04-FAC-38-38-24 90L075MA1NN80S3C7D04FAC383824 90-L-075-MA-1-NN-80-S-3-C7-D-09-GBA-42-42-20 90L075MA1NN80S3C7D09GBA424220 90-L-075-MA-1-NN-80-S-3-C7-E-03-GBA-32-32-20 90L075MA1NN80S3C7E03GBA323220 90-L-075-MA-1-NN-80-S-3-S1-D-03-GBA-26-26-20 90L075MA1NN80S3S1D03GBA262620 90-L-075-MA-1-NN-80-S-3-S1-D-03-GBA-35-35-20 90L075MA1NN80S3S1D03GBA353520 90-L-075-MA-1-NN-80-S-3-S1-D-03-GBA-35-35-24 90L075MA1NN80S3S1D03GBA353524 90-L-075-MA-1-NN-80-S-3-S1-D-03-GBA-42-42-24 90L075MA1NN80S3S1D03GBA424224 90-L-075-MA-1-NN-80-S-3-S1-E-03-GBA-35-35-24 90L075MA1NN80S3S1E03GBA353524 90-L-075-MA-1-NN-80-S-3-T1-E-03-GBA-42-42-24 90L075MA1NN80S3T1E03GBA424224 90-L-075-MA-1-NN-80-S-3-T2-D-03-GBA-42-42-24 90L075MA1NN80S3T2D03GBA424224 90-L-075-MA-1-NN-80-S-3-T2-E-04-GBA-35-35-24 90L075MA1NN80S3T2E04GBA353524 90-L-075-MA-1-NN-80-S-4-S1-C-03-GBA-35-35-24 90L075MA1NN80S4S1C03GBA353524 90-L-075-MA-1-NN-80-S-4-S1-D-03-GBA-26-26-24 90L075MA1NN80S4S1D03GBA262624 90-L-075-MA-1-NN-80-S-4-S1-D-03-GBA-26-26-24-F058 90L075MA1NN80S4S1D03GBA262624F058 90L075-MA-1-NN-80-S-4-T2-E-04-GBA-32-32-20 90L075MA1NN80S4T2E04GBA323220 90-L-075-MA-1-NN-80-S-4-T2-E-04-GBA-32-32-20 90L075MA1NN80S4T2E04GBA323220 90L075-MA-1-NN-80-S-4-T2-E-04-GBA-32-32-20-F001 90L075MA1NN80S4T2E04GBA323220F001 90-L-075-MA-1-NN-81-R-3-S1-D-03-GBA-32-32-24 90L075MA1NN81R3S1D03GBA323224 90-L-075-MA-1-NN-81-S-3-S1-D-03-GBA-35-35-24 90L075MA1NN81S3S1D03GBA353524 90-L-075-MA-1-NN-81-S-3-T2-E-03-GBA-35-35-20 90L075MA1NN81S3T2E03GBA353520 90L075-MA-2-BB-60-P-3-C7-D-03-GBA-42-42-24 90L075MA2BB60P3C7D03GBA424224 90-L-075-MA-2-BB-60-P-3-C7-D-03-GBA-42-42-24 90L075MA2BB60P3C7D03GBA424224 90L075-MA-2-BC-60-S-3-C7-D-03-GBA-14-32-24 90L075MA2BC60S3C7D03GBA143224 90-L-075-MA-2-BC-60-S-3-C7-D-03-GBA-14-32-24 90L075MA2BC60S3C7D03GBA143224 90-L-075-MA-2-BC-60-S-4-S1-E-05-GBA-26-26-28 90L075MA2BC60S4S1E05GBA262628 90-L-075-MA-2-NN-80-S-3-C6-E-02-GBA-42-42-24 90L075MA2NN80S3C6E02GBA424224 90-L-075-MA-2-NN-80-S-3-S1-D-03-GBA-35-35-24 90L075MA2NN80S3S1D03GBA353524 90-L-075-MA-2-NN-80-S-3-S1-E-03-GBA-42-42-24 90L075MA2NN80S3S1E03GBA424224 90L075-MA-5-AB-60-S-3-C6-D-C6-GBA-29-29-24 90L075MA5AB60S3C6DC6GBA292924 90-L-075-MA-5-AB-60-S-3-C6-D-C6-GBA-29-29-24 90L075MA5AB60S3C6DC6GBA292924 90L075-MA-5-AB-60-S-4-S1-D-C6-GBA-42-42-24 90L075MA5AB60S4S1DC6GBA424224 90-L-075-MA-5-AB-60-S-4-S1-D-C6-GBA-42-42-24 90L075MA5AB60S4S1DC6GBA424224 90L075-MA-5-BB-60-R-3-C7-D-C5-FAC-42-42-24 90L075MA5BB60R3C7DC5FAC424224 90-L-075-MA-5-BB-60-R-3-C7-D-C5-FAC-42-42-24 90L075MA5BB60R3C7DC5FAC424224 90-L-075-MA-5-BB-80-P-3-S1-D-C6-GBA-42-42-24 90L075MA5BB80P3S1DC6GBA424224 90L075-MA-5-BB-80-S-3-C7-D-C6-GBA-40-40-24 90L075MA5BB80S3C7DC6GBA404024 90-L-075-MA-5-BB-80-S-3-C7-D-C6-GBA-40-40-24 90L075MA5BB80S3C7DC6GBA404024 90L075-MA-5-BB-80-S-3-C7-D-C6-GBA-42-42-24 90L075MA5BB80S3C7DC6GBA424224 90-L-075-MA-5-BB-80-S-3-C7-D-C6-GBA-42-42-24 90L075MA5BB80S3C7DC6GBA424224 90L075-MA-5-BC-60-P-3-S1-D-C5-GBA-42-42-24 90L075MA5BC60P3S1DC5GBA424224 90-L-075-MA-5-BC-60-P-3-S1-D-C5-GBA-42-42-24 90L075MA5BC60P3S1DC5GBA424224 90L075-MA-5-BC-60-S-3-C7-E-C5-GBA-42-42-24 90L075MA5BC60S3C7EC5GBA424224 90-L-075-MA-5-BC-60-S-3-C7-E-C5-GBA-42-42-24 90L075MA5BC60S3C7EC5GBA424224 90L075-MA-5-CD-60-S-3-C6-D-C5-GBA-42-42-24 90L075MA5CD60S3C6DC5GBA424224 90-L-075-MA-5-CD-60-S-3-C6-D-C5-GBA-42-42-24 90L075MA5CD60S3C6DC5GBA424224 90L075-MA-5-CD-60-S-3-S1-D-C6-GBA-21-21-24 90L075MA5CD60S3S1DC6GBA212124 90-L-075-MA-5-CD-60-S-3-S1-D-C6-GBA-21-21-24 90L075MA5CD60S3S1DC6GBA212124 90-L-075-MA-5-NN-60-S-3-C6-D-C3-GBA-35-35-24 90L075MA5NN60S3C6DC3GBA353524 90-L-075-MA-5-NN-60-S-3-C6-D-C5-GBA-35-35-24 90L075MA5NN60S3C6DC5GBA353524 90L075-MA-5-NN-60-S-3-S1-D-C5-GBA-42-42-24 90L075MA5NN60S3S1DC5GBA424224 90-L-075-MA-5-NN-60-S-3-S1-D-C5-GBA-42-42-24 90L075MA5NN60S3S1DC5GBA424224 90L075-MA-5-NN-60-S-4-S1-D-C4-GBA-20-20-20 90L075MA5NN60S4S1DC4GBA202020 90-L-075-MA-5-NN-60-S-4-S1-D-C4-GBA-20-20-20 90L075MA5NN60S4S1DC4GBA202020 90-L-075-MA-5-NN-60-S-4-S1-D-C4-GBA-20-20-24 90L075MA5NN60S4S1DC4GBA202024 90L075-MA-5-NN-80-P-3-C7-D-C4-GBA-45-45-20 90L075MA5NN80P3C7DC4GBA454520 90-L-075-MA-5-NN-80-P-3-C7-D-C4-GBA-45-45-20 90L075MA5NN80P3C7DC4GBA454520 90L075-MA-5-NN-80-P-4-C6-D-C4-GBA-35-35-24 90L075MA5NN80P4C6DC4GBA353524 90-L-075-MA-5-NN-80-P-4-C6-D-C4-GBA-35-35-24 90L075MA5NN80P4C6DC4GBA353524 90-L-075-MA-5-NN-80-R-3-S1-D-C5-GBA-32-32-24 90L075MA5NN80R3S1DC5GBA323224 90-L-075-MA-5-NN-80-R-4-S1-E-C5-GBA-23-23-24 90L075MA5NN80R4S1EC5GBA232324 90L075-MA-5-NN-80-S-3-C7-D-C5-GBA-17-17-24 90L075MA5NN80S3C7DC5GBA171724 90-L-075-MA-5-NN-80-S-3-C7-D-C5-GBA-17-17-24 90L075MA5NN80S3C7DC5GBA171724 90-L-075-MA-5-NN-80-S-3-S1-D-C5-GBA-35-35-24 90L075MA5NN80S3S1DC5GBA353524 90-L-075-MA-5-NN-80-S-3-S1-D-C5-GBA-38-38-24 90L075MA5NN80S3S1DC5GBA383824 90L075-MA-5-NN-80-S-4-C6-C-C5-GBA-42-42-24 90L075MA5NN80S4C6CC5GBA424224 90-L-075-MA-5-NN-80-S-4-C6-C-C5-GBA-42-42-24 90L075MA5NN80S4C6CC5GBA424224 90-L-075-MA-5-NN-81-R-3-S1-D-C5-GBA-42-42-24 90L075MA5NN81R3S1DC5GBA424224。
