The speed control circuit is a circuit that controls the movement speed and speed switching of the actuator in the hydraulic system of the guide rail hydraulic lifting platform. The main control methods include valve control, pump control and actuator control. Common speed control circuits include speed control circuit, high-speed circuit and speed switching circuit.

液壓貨梯廠家提醒液壓升降貨梯調(diào)速回路的基本原理系統(tǒng)常常需要調(diào)節(jié)液壓缸和液壓馬達的運動速度，以適應(yīng)主機的工作循環(huán)需要。液壓缸和液壓馬達的速度取決于排量和輸入流量。可以看出，通過改變流量或排量，可以控制氣缸和電機的速度。

The manufacturer of the hydraulic freight elevator reminds the basic principle of the speed regulating circuit of the hydraulic lift freight elevator. The system often needs to adjust the movement speed of the hydraulic cylinder and the hydraulic motor to meet the working cycle needs of the host machine. The speed of the hydraulic cylinder and the hydraulic motor depends on the displacement and the input flow. It can be seen that the speed of the cylinder and motor can be controlled by changing the flow or displacement.

對于液壓升降貨梯中液壓缸來說，通過改變其作用面積A(相當(dāng)于排量)來調(diào)速是不現(xiàn)實的，一般只能用改變流量的方法來調(diào)速。對變量馬達來說，調(diào)速既可以改變流量，也可改變馬達排量。

For the hydraulic cylinder in the hydraulic elevator, it is unrealistic to adjust the speed by changing its action area a (equivalent to the displacement). Generally, the speed can only be adjusted by changing the flow. For variable speed motor, speed regulation can change both flow and motor displacement.

因此，液壓貨梯批發(fā)廠家提醒調(diào)速回路主要有以下三種方式：

Therefore, the wholesaler of hydraulic freight elevator shall remind the speed regulating circuit in the following three ways:

1、節(jié)流調(diào)速回路：通過定量泵供油，利用流量閥調(diào)節(jié)進出執(zhí)行機構(gòu)的流量，實現(xiàn)調(diào)速；

1. Throttling and speed regulating circuit: the oil is supplied by the quantitative pump, and the flow in and out of the actuator is regulated by the flow valve to realize speed regulation;

2、在體積節(jié)流調(diào)速回路中，由限壓變量泵供油，由流量閥調(diào)節(jié)進入執(zhí)行器的流量，使變量泵的流量適應(yīng)調(diào)速閥的調(diào)節(jié)流量。

2. In the volume throttling speed regulating circuit, the pressure limiting variable pump supplies oil, and the flow into the actuator is regulated by the flow valve to make the flow of the variable pump adapt to the regulated flow of the speed regulating valve.

3、容積調(diào)速回路：用調(diào)節(jié)變量泵或變量馬達的排量來調(diào)速；

3. Volume speed regulating circuit: regulate the speed by adjusting the displacement of variable pump or variable motor;

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