The emergence and use of concrete mixer truck can provide a lot of convenience for various engineering construction. These are the credit of automatic loading mixer truck, which improves the operation efficiency of the equipment to the extent of use. If users want to ensure the use function of the automatic feeding mixer, one of the important accessories is the transmission shifter. If each accessory is used for a long time, there will be some problems. How to repair it after it is damaged? Follow Xiaobian to learn about it.
1、攪拌車(chē)離合器損壞的原因動(dòng)力換擋變速器離合器接合時(shí)，液壓油的壓力克服繃簧力壓緊沖突片。跟著(zhù)液壓油壓力的升高，沖突片與金屬盤(pán)觸摸并逐步壓緊，使離合器將飛輪動(dòng)力平穩地傳遞到變速器輸人軸。每次換擋時(shí)，沖突片都要與鋼片發(fā)生沖突，發(fā)生的熱量由冷卻液發(fā)出出去。
1. The reason for the damage of the clutch of the mixer truck when the clutch of the power shift transmission is engaged, the pressure of the hydraulic oil overcomes the tension spring force to press the collision plate. With the increase of hydraulic oil pressure, the collision plate and metal plate touch and compress gradually, so that the clutch can smoothly transfer the flywheel power to the transmission input shaft. During each shift, the collision plate will conflict with the steel plate, and the heat generated will be sent out by the coolant.
當沖突片及鋼片變薄時(shí)，為了使它們充分接合就需要更多的液壓油，發(fā)動(dòng)機須進(jìn)一步加速，沖突片在鋼片上的打滑時(shí)刻也隨之延伸，由此發(fā)生的沖突熱量也會(huì )更多，促使液壓油的溫度添加，當到達足以改變變速器中密封件功能的溫度時(shí)，變速器就會(huì )發(fā)生內泄。
When the conflict plate and steel plate become thinner, more hydraulic oil is needed to make them fully engaged. The engine must be further accelerated, and the slip time of the conflict plate on the steel plate will also extend, resulting in more conflict heat, which will promote the temperature of the hydraulic oil to be added. When the temperature reaches the temperature sufficient to change the function of the seal in the transmission, the transmission will leak internally.
而內泄又從兩個(gè)方面持續引起熱量的添加：高壓油經(jīng)損壞的密封處走漏，使油溫持續升高；因為漏油，液壓泵勢必要輸送更多的油液來(lái)確保接合離合器時(shí)所需的壓力，使離合器充分地接合，這也要求發(fā)動(dòng)機持續加速，使液壓泵發(fā)生更大的流量。如此惡性循環(huán)，必將導致離合器過(guò)熱或燒損，直徹底失效。
The internal leakage continuously causes the addition of heat from two aspects: the high-pressure oil leaks through the damaged seal, making the oil temperature rise continuously; Because of oil leakage, it is necessary for the hydraulic pump to deliver more oil to ensure the pressure required to engage the clutch and fully engage the clutch, which also requires the continuous acceleration of the engine and greater flow of the hydraulic pump. Such a vicious cycle will inevitably lead to overheating or burning of the clutch until it completely fails.
2、攪拌車(chē)的離合器活塞密封性的檢測也很關(guān)鍵。裝載機啟動(dòng)行走沒(méi)有勁頭以及油溫過(guò)高時(shí)，就需要判斷是離合器活塞密封不嚴還是油壓缺乏引起的，但常規檢測手法有時(shí)很難斷定是哪個(gè)原因引起毛病，尤其是在無(wú)動(dòng)力的情況下，查看拼裝好的變速器總成的各密封環(huán)就更困難了。
2. The detection of the tightness of the clutch piston of the mixer is also very important. When the loader has no power to start and travel and the oil temperature is too high, it is necessary to judge whether it is caused by the loose sealing of the clutch piston or the lack of oil pressure, but it is sometimes difficult to determine which cause the problem by conventional detection methods, especially in the case of no power, it is more difficult to check the sealing rings of the assembled transmission assembly.
此時(shí)，可采用氣壓閥進(jìn)行測驗。首要，將自動(dòng)上料攪拌車(chē)變速器控制閥拆掉（對拼裝好的變速器應在裝控制閥之前），然后依次給變速器各油孔通人0.6一0.8MPa的氣體，若某一個(gè)孔通人氣體時(shí)，聽(tīng)到"嘭"的一聲且無(wú)漏氣聲或漏氣聲很小進(jìn)口計量泵，則說(shuō)明與之對應的離合器活塞與缸筒間的密封良好；若聽(tīng)不到活塞壓緊沖突片的動(dòng)靜且漏氣聲較大，則說(shuō)明離合器活塞與缸筒間的密封失效，應替換密封件。
At this time, the pneumatic valve can be used for test. First of all, remove the control valve of the transmission of the automatic feeding mixer truck (for the assembled transmission, it should be before the control valve is installed), and then fill each oil hole of the transmission with 0.6-0.8mpa gas in turn. If a hole is filled with gas, a "bang" sound is heard without air leakage sound or the air leakage sound is very small, It indicates that the seal between the corresponding clutch piston and cylinder barrel is good; If you can't hear the movement of the piston pressing the collision plate and the sound of air leakage is large, it indicates that the seal between the clutch piston and the cylinder barrel is invalid and the seal should be replaced.
