quantity n. 1.量 (opp. quality); 分量,数量;额;【物理学】值,参量。 2.〔pl.〕大量,大宗,大批,许多。 3.定量,定额。 4.【数学】量;表示量的数字[符号];【逻辑学】(名词、特别是命题主语的)量。 5.【音韵学】音节的长短;表示音节长短的符号;【语音】(元[母]、音节等的)音量。 6.【法律】期限。 a known quantity 已知数。 an unknown quantity 未知数;〔比喻〕难预测的人[物]。 a negligible quantity 可忽略的量;〔比喻〕无足轻重的人〔物〕;可忽略的因素。 a quantity of 一些。 in quantities 大量。 in quantity 很多。
When the governing valve was series-connected on the return oil-line in the metering-out control system, under the same flow area and the same adjusted pressure of relief valve, with the incremental quantity of step load, the pressure highly-adjusted capacity of the hydraulic cylinder chamber with piston-rod increased, meanwhile, it's time of rise, time to peak and the governing time all increased . at the same time, the pressure highly-adjusted capacity of the hydraulic cylinder chamber without piston-rod increased 当出口节流调速系统的回油路上串接调速阀时,随阶跃负载的增加,在相同流量阀开度、相同溢流阀调节压力的情况下,液压缸有杆腔压力p_2(t)的超调量是增加的,上升时间、峰值时间以及调整时间也是增加的;液压缸无杆腔压力p_1(t)的超调量是增加的。
Accorded to the experimental research, under different flow area of flow valve and different adjusted pressure of relief valve, conclusion that the regulation of the pressure p1, p2 in the two cylinder chambers varied with the change of step load were as follows : when the throttle valve was series-connected on the return oil-line in the metering-out control system, under the same flow area and the same adjusted pressure of relief valve, with the incremental quantity of step load, the pressure highly-adjusted capacity of the hydraulic cylinder chamber with piston-rod decreased, meanwhile, it's time of rise, time to peak and the governing time all decreased . while the pressure highly-adjusted capacity of the hydraulic cylinder chamber without piston-rod increased 通过试验研究得出系统在不同的流量阀开度、不同溢流阀调节压力(进口压力)下,液压缸两腔压力p_1、p_2随阶跃负载变化的规律:当出口节流调速系统的回油路上串接节流阀时,随阶跃负载的增加,在相同流量阀开度、相同溢流阀调节压力的情况下,液压缸有杆腔压力p_2(t)的超调量是减小的,上升时间、峰值时间以及调整时间也是减小的;液压缸无杆腔压力p_1(t)的超调量是增加的。