PROSOFT 5302-MBP-MCM4/MB+ PLC模塊
降速UG杠桿調(diào)速器可在工廠配備降速組件。速度下降，或者簡稱為下降，是在調(diào)速器中產(chǎn)生穩(wěn)定性的一種方法。Droop還用于在并聯(lián)或連接到單個軸的兩個或多個原動機之間分配和平衡負載。Droop是調(diào)速器輸出軸響應負載增加從最小燃油位置移動到最大燃油位置時發(fā)生的速度下降，以額定速度的百分比表示。如果，而不是降低速度。出現(xiàn)增加時，調(diào)速器顯示出負下降。負下降將導致調(diào)速器不穩(wěn)定。沒有足夠的下垂會導致不穩(wěn)定，表現(xiàn)為振蕩、浪涌或難以響應負載變化。過多的下垂可能導致調(diào)速器在負載上下時響應緩慢。使用調(diào)速器速度在空載時為1500rpm和在滿載時為1450rpm的示例，降速可通過以下公式計算：%降速=空載速度–滿載速度滿載速度x 100%降速=1500 rpm–1450 rpm 1450 rpm x 100=3.5%如果調(diào)速器輸出軸未使用從“空載”到“滿載”的全部2/3可用行程，降速也將成比例減少。如果轉(zhuǎn)速下降幅度大于50 rpm，調(diào)速器顯示下降幅度大于3.5%。
調(diào)速器彈簧力或速度設(shè)置通過速度調(diào)節(jié)軸（1）手動控制。補償系統(tǒng)補償系統(tǒng)的目的是使調(diào)速器穩(wěn)定，并獲得穩(wěn)定的速度控制。此外，當正確調(diào)節(jié)時，補償系統(tǒng)有效地調(diào)節(jié)使發(fā)動機達到所需輸出所需的燃油量，以調(diào)節(jié)負載的減少或增加。大補償活塞（21）、小補償活塞（20）、浮動桿（18）、帶可調(diào)節(jié)支點（24）的補償調(diào)節(jié)桿（5）以及補償針閥（22）組成補償系統(tǒng)（見圖3-1）。補償只是暫時速度下降特性的另一個詞。補償系統(tǒng)引入了隨輸出軸運動而對速度設(shè)置進行的臨時重新調(diào)整，以產(chǎn)生穩(wěn)定的速度下降特性，隨后速度設(shè)置相對緩慢地恢復到其原始值。大補償活塞（21）通過補償調(diào)節(jié)桿（5）連接到輸出軸（6）?？蓸修D(zhuǎn)的支點（24）騎在調(diào)節(jié)桿上。改變支點的位置允許調(diào)節(jié)桿（5）控制可用于致動補償活塞的行程量。小補償活塞（20）通過浮動桿與先導閥柱塞和調(diào)速器桿相連。向下移動大補償活塞（21）會迫使機油位于小補償活塞（20）下方。當小補償活塞（20）被向上推動時，它提升pvp以關(guān)閉控制端口，從而阻止機油流向動力活塞（7）的底部。針閥（22）控制油底殼與大補償活塞（21）和小補償活塞（20）之間的油流量。補償必須根據(jù)特定的發(fā)動機和負載進行適當調(diào)整，以提供穩(wěn)定的運行（見第4章，補償調(diào)整）。
Accumulator The purpose of the accumulator (8) Is to store oil under pressure for the operation of the UG Lever governor. The accumulator (two cylinders) also acts as a pressure relief valve if oil pressure is increased above 120 psi/827 kPa (150 psi/1034 kPa for UG-10). The accumulator (8) consists of two spring-loaded pistons (9). Oil is pumped into the cylinders and pressure is increased as the accumulator springs (9) are compressed. When the oil pressure exceeds 120 psi/827 kPa (150 psi/1034 kPa for UG-10), oil is released back to sump through a relief port (10) in each cylinder. Oil flows from the accumulator (8) through passages to the top of the power piston (7) and to the pilot valve system (14 and 15)
If, instead of a decrease in speed. an increase takes place, the governor is showing a negative droop. Negative droop will cause instability in a governor. Not enough droop can cause instability in the form of hunting, surging or difficulty in response to a load change. Too much droop can result in slow governor response in picking up or dropping off a load. Using an example where the governor speed is 1500 rpm at no load and 1450 rpm at full load, droop can be calculated with the formula: % Droop = No load speed – Full load speed Full load speed x 100 % Droop = 1500 rpm – 1450 rpm 1450 rpm x 100 = 3.5% If the governor output shaft does not use the full 2/3 of available travel from “NO LOAD” to “FULL LOAD,” droop will also be reduced proportionately. If the decrease in speed is greater than 50 rpm, droop greater than 3.5% is shown by the governor.
Speeder spring force or speed setting Is controlled manually through the speed adjusting shaft (1). Compensation System The purpose of the compensation system is to give stability to the governor and to obtain steady state speed control. Also, when correctly adjusted, the compensation system effectively regulates the amount of fuel necessary to bring the engine to the required output to adjust to a decrease or an increase in load. A large compensation piston (21), small compensation piston (20), a floating lever (18), a compensation adjusting lever (5) with adjustable fulcrum (24), along with a compensating needle valve (22) make up the compensation system (see Figure 3-1). Compensation is simply another word for temporary speed droop characteristic. The compensation system introduces a temporary readjustment of speed setting with output shaft movement to produce a stabilizing speed droop characteristic, followed by a relatively slow return of speed setting to its original value.The large compensation piston (21) is linked to the output shaft (6) by a compensation adjusting lever (5). A pivotable fulcrum (24) rides on the adjusting lever. Changing the fulcrum’s position allows the adjusting lever (5) to control the amount of stroke available for the actuating compensating piston.