自上料攪拌車的液壓系統(tǒng)通常分兩大類：開式系統(tǒng)與閉式系統(tǒng)，當(dāng)前市場(chǎng)的低端企業(yè)主要以開式系統(tǒng)為主，高的端企業(yè)主要以推進(jìn)口閉式系統(tǒng)；推進(jìn)口閉式系統(tǒng)結(jié)構(gòu)緊湊，可靠性高，下邊對(duì)兩種結(jié)構(gòu)進(jìn)行詳解，便于識(shí)別：

The hydraulic system of self loading mixer truck is generally divided into two categories: open system and closed system. The low-end brands in the current market mainly focus on open system, while the high-end brands mainly focus on the propulsion port closed system; The propulsion port closed system has a compact structure and high reliability. The following two structures are explained in detail for easy identification:

開式系統(tǒng)：

Open system:

雙聯(lián)齒輪泵+擺線齒輪馬達(dá)

Double gear pump+cycloidal gear motor

原理：

Principle:

兩個(gè)定量齒輪泵。在低速狀態(tài)，液壓泵向液壓馬達(dá)供油；高速狀態(tài)，油泵同時(shí)向液壓馬達(dá)供油。液壓泵的排油量是不同的，主要根據(jù)高速與低速供油狀態(tài)的轉(zhuǎn)速而定。換向閥控制攪拌筒正反轉(zhuǎn)，溢流閥7起過載保護(hù)作用。溢流閥與單向閥起著防沖擊的補(bǔ)油保護(hù)作用。

Two constant displacement gear pumps. At low speed, the hydraulic pump supplies oil to the hydraulic motor; At high speed, the oil pump supplies oil to the hydraulic motor at the same time. The oil discharge of the hydraulic pump is different, mainly depending on the speed of high speed and low speed oil supply. The reversing valve controls the positive and reverse rotation of the mixing drum, and the overflow valve 7 plays an overload protection role. The overflow valve and one-way valve play the role of anti impact oil supplement protection.

特點(diǎn)：

characteristic:

通過發(fā)動(dòng)機(jī)的油門來調(diào)節(jié)轉(zhuǎn)速，能耗大、不經(jīng)濟(jì)。需要大油箱，結(jié)構(gòu)龐大；液壓油中易混入空氣，振動(dòng)與噪聲大，可靠性差、壽命短。

Adjusting the speed through the throttle of the engine consumes a lot of energy and is not economical. Large oil tank is required and the structure is huge; The hydraulic oil is easy to mix with air, with large vibration and noise, poor reliability and short service life.

閉式系統(tǒng)：

Closed system:

軸向柱塞變量泵+定量馬達(dá)

Axial piston variable displacement pump+constant displacement motor

原理：伺服液壓缸控制柱塞變量泵斜盤的方向與傾角，用來調(diào)節(jié)柱塞泵3的方向與排量。高壓溢流閥能防止系統(tǒng)過載，起保護(hù)作用。兩個(gè)高壓溢流閥的開啟壓力值可根據(jù)液壓馬達(dá)兩側(cè)油路的負(fù)載分別調(diào)定，以適應(yīng)不同工況的要求。

Principle: The servo hydraulic cylinder controls the direction and inclination of the swashplate of the piston variable displacement pump to adjust the direction and displacement of the piston pump 3. High pressure relief valve can prevent system overload and play a protective role. The opening pressure of the two high-pressure relief valves can be adjusted according to the load of the oil circuit on both sides of the hydraulic motor to meet the requirements of different working conditions.

特點(diǎn)：

characteristic:

通過柱塞變量泵斜盤調(diào)整轉(zhuǎn)速、轉(zhuǎn)向，結(jié)構(gòu)緊湊，油箱容積小，散熱要求高，工作穩(wěn)定，可靠性高、壽命長。

The rotary speed and steering direction are adjusted through the swashplate of the plunger variable displacement pump. The structure is compact, the tank volume is small, the heat dissipation requirements are high, the work is stable, the reliability is high, and the service life is long.

講解攪拌車的液壓系統(tǒng)通常分兩大類的相關(guān)信息就講解完畢了，建議您在平常使用中仔細(xì)對(duì)其進(jìn)行檢查，以防止問題的出現(xiàn)影響了使用以及工作質(zhì)量，更多相關(guān)內(nèi)容就來我們網(wǎng)站http://www.dqpme.cn進(jìn)行咨詢了解吧！

The explanation of the hydraulic system of the mixer is usually divided into two categories. It is recommended that you carefully check the hydraulic system in normal use to prevent problems from affecting the safety and quality of work. More relevant information can be found on our website http://www.dqpme.cn Consult and understand!