The mine explosion-proof loader is mainly used to shovel soil, sand, lime, coal and other bulk materials, and can also be used for light shovel excavation of ore and hard soil. Changing different auxiliary working devices can also carry out bulldozing, lifting and loading and unloading of other materials such as wood.

在道路、特別是在高等級公路施工中，小鏟車用于路基工程的填挖、瀝青混合料和水泥混凝土料場的集料與裝料等作業(yè)。此外還可進(jìn)行推運土壤、刮平地面和牽引其他機械等作業(yè)。

In road construction, especially in high-grade highway construction, small forklifts are used for filling and excavation of subgrade engineering, aggregate and loading of asphalt mixture and cement concrete stockyard. In addition, it can also push and transport soil, scrape the ground and pull other machinery.

裝載機主要部件包括發(fā)動機，變矩器，變速箱，前、后驅(qū)動橋，簡稱四大件。

The main components of the loader include engine, torque converter, gearbox, front and rear drive axles, which are referred to as the four major parts for short.

變矩器上有三個泵，工作泵（供應(yīng)舉升，翻斗壓力油）、轉(zhuǎn)向泵（供應(yīng)轉(zhuǎn)向壓力油）、變速泵也稱行走泵（供應(yīng)變矩器，變速箱壓力油），有些機型轉(zhuǎn)向泵上還裝有先導(dǎo)泵（供應(yīng)操縱閥先導(dǎo)壓力油）。

There are three pumps on the torque converter, working pump (supply lifting and tipping pressure oil), steering pump (supply steering pressure oil), and variable speed pump, also known as travel pump (supply torque converter and transmission pressure oil). Some models of steering pump are also equipped with pilot pump (supply control valve pilot pressure oil).

變速泵是安裝在裝載機變速箱上的一種油泵，其為變速箱提供檔位壓力油和變距器用油，其在長期使用后，變速泵內(nèi)部的齒輪會把變速泵側(cè)面的的殼體磨損掉，這樣就會造成變速泵內(nèi)部的密封間隙變大，被齒輪排到出油口的油會從磨損的地方回流，使壓力降低，使變速泵失去使用價值，影響裝載機的使用。

The transmission pump is an oil pump installed on the gearbox of the loader, which provides gear pressure oil and oil for the variator for the gearbox. After long-term use, the gear inside the transmission pump will wear off the shell on the side of the transmission pump, which will cause the sealing gap inside the transmission pump to become larger, and the oil discharged to the oil outlet by the gear will return from the worn place to reduce the pressure, The variable speed pump loses its use value and affects the use of the loader.

變速泵的工作性能直接影響到裝載機的工作效率與可靠性，改進(jìn)變速泵的結(jié)構(gòu)，能提高變速泵的釋積效率、改善自吸性能、降低運轉(zhuǎn)噪聲、延長使用壽命。

The working performance of variable speed pump directly affects the working efficiency and reliability of loader. Improving the structure of variable speed pump can improve the release efficiency of variable speed pump, improve self-priming performance, reduce operating noise and prolong service life.