廢鋼鐵剪切機(jī)；he system components to decrease, the loosening of the connecting bolts and the cracking of the pipes make the whole system unable to work properly, and the hydraulic impact is one of the main reasons for the vibration of the system. The reason is that the system adopts the improper backpressure of the throttle valve.節(jié)流閥的節(jié)流孔雖然是可調(diào)的，但在緩沖過程中卻保持不變。有f力作用時(shí)，活塞速度不可能降低至零，只能趨于一個(gè)恒定值，因而機(jī)械沖擊總是存在，說明用節(jié)流閥作背壓緩沖元件，不能*消除沖擊，從而引起系統(tǒng)振動(dòng)。The throttle orifice of the throttle valve is adjustable, but it remains unchanged during the buffer process. When the f force is used, the piston speed can not be reduced to zero and can only tend to a constant value, so the mechanical impact always exists, indicating that the throttle valve is a backpressure buffer element that can not eliminate the impact thoroughly, thus causing the vibration of the system.ttle valve, the energy loss also increases. The energy of the loss is converted into heat, and the oil is absorbed by the oil, causing the oil to rise through the throttle, aggravating the oil metamorphism, oxidation, precipitating a variety of impurities, causing blockage, causing the phenomenon of throttle valve plugging and making the system vibrate.剪切機(jī)液壓系統(tǒng)采用節(jié)流閥作背壓緩沖不當(dāng)。而如果簡單把節(jié)流閥去掉勢必導(dǎo)致液壓沖擊和振動(dòng)的加劇。The hydraulic system of the shearing machine adopts the throttle valve as a backpressure buffer. If the throttle valve is removed simply, it will lead to the increase of hydraulic impact and vibration.

廢鋼鐵剪切機(jī)；

液壓缸有桿腔與無桿腔面積之比是S1：S2=1：2.82，在不計(jì)任何損失的情況下，剪切過程中p2S2=N+p1S1，N為負(fù)荷剪切力。當(dāng)鑄坯被突然剪斷時(shí)，N=0，則p2S2=p1S1，得p1=2.82p2，其值遠(yuǎn)大于節(jié)流閥的合理壓差0.2~0.3MPa。由于節(jié)流閥前后壓力差大，能量損失也隨之增大。損失的能量全部轉(zhuǎn)換成了熱量，被油液吸收后，致使油液通過節(jié)流口時(shí)溫度升高，加劇油液變質(zhì)、氧化，析出各種雜質(zhì)，產(chǎn)生堵塞，引起節(jié)流閥堵塞現(xiàn)象的出現(xiàn)，使系統(tǒng)產(chǎn)生振動(dòng)。廢鋼鐵剪切機(jī)；