How to eliminate the abnormality of mine loader

礦用裝載機在進行整機強化試驗過程中底盤出現(xiàn)異響，具體情況是：在發(fā)動機怠速狀態(tài)下行駛時轉動轉向盤，該機底盤某個部位會發(fā)出清脆的金屬撞擊聲，轉向盤轉到哪個位置出現(xiàn)異響不確定；當踩下油門加速行駛時，該響聲變得微弱，或基本消失。

During the whole machine strengthening test of the mining loader, the chassis makes abnormal noise. The specific situation is: when the steering wheel is turned when the engine is running at idle speed, a part of the chassis will make a crisp metal impact sound, and it is uncertain where the steering wheel makes abnormal noise; When stepping on the accelerator to accelerate, the sound becomes weak or basically disappears.

根據(jù)該機故障現(xiàn)象和對其轉向系統(tǒng)結構的分析，我們認為其機架、轉向液壓系統(tǒng)、變速器出現(xiàn)故障的可能性很小，該異響可能來源于以下3方面：一是傳動軸伸縮時產生異響，二是主減速器和差速器異響，三是后橋擺動架異響。

According to the fault phenomenon of the machine and the analysis of its steering system structure, we believe that the possibility of failure of its frame, steering hydraulic system and transmission is very small, and the abnormal noise may come from the following three aspects: first, the abnormal noise generated during the expansion and contraction of the transmission shaft, second, the abnormal noise of the main reducer and differential, and third, the abnormal noise of the swing frame of the rear axle.

（1）排查傳動軸

(1) Check the transmission shaft

后橋在擺架上擺動時，后橋的輸入法蘭也會隨后橋擺動，使后傳動軸的長度及空間位置發(fā)生變化。檢查發(fā)現(xiàn)裝載機在轉向過程中，后傳動軸并不會發(fā)生明顯伸縮，該處無存在異響的可能性。

When the rear axle swings on the swing frame, the input flange of the rear axle will also swing with the rear axle, changing the length and spatial position of the rear transmission shaft. It is found that during the steering process of the loader, the rear transmission shaft will not expand significantly, and there is no possibility of abnormal sound.

（2）排查主減速器和差速器

(2) Check the final drive and differential

在后驅動橋的輪邊減速器位置用手觸摸能感覺到有撞擊動作。我們更換了主減速器和差速器總成，經試機異響問題依然沒有。

At the wheel reducer position of the rear drive axle, you can feel the impact action by touching it with your hand. We replaced the main reducer and differential assembly, but the problem of abnormal noise still hasn't been solved after test.

（3）掃卜查后橋擺架

(3) Sweep the rear axle swing frame

為了模擬異響時的工狀，并能實時觀察前、后擺動架的實際運行情況，我們將該裝載機開到檢修平臺上。通過多次原地轉向、進退行駛試驗，仔細觀察擺架狀態(tài)，發(fā)現(xiàn)后擺動架與橋殼之間有3mm相對竄動。正是由于后連接法蘭在后擺動架的竄動，引發(fā)了后擺動架與后橋殼上的連接法蘭相互撞擊，從而產生了異響。

In order to simulate the working state in case of abnormal noise and observe the actual operation of the front and rear swing frames in real time, we drive the loader to the maintenance platform. Through many in-situ steering, forward and backward driving tests and careful observation of the swing frame state, it is found that there is 3mm relative movement between the rear swing frame and the axle housing. It is the movement of the rear connecting flange on the rear swing frame that causes the rear swing frame and the connecting flange on the rear axle housing to collide with each other, resulting in abnormal noise.

找到異響發(fā)生位置后，我們分析產生該間隙的原因。查閱后橋圖紙，并從后橋的供應商那里的到了相關情況。該型裝載機后橋橋殼與后擺動架的理論設計間隙為1.1～2.15mm，安裝時的調整墊片只有厚度為6mm的1種規(guī)格。

After finding the location where the abnormal sound occurs, we analyze the cause of the gap. Consult the rear axle drawing and get the relevant information from the rear axle supplier. The theoretical design clearance between the rear axle housing and the rear swing frame of this loader is 1.1 ~ 2.15mm. During installation, the adjusting gasket has only one specification with a thickness of 6mm.

實際拆檢出現(xiàn)異響的這臺裝載機，測量其調整墊片厚度只有5.1mm。再加上設計間隙，總共累積成3mm間隙。

The thickness of the adjusting gasket of the loader with abnormal noise during the actual disassembly and inspection is only 5.1mm. In addition to the design clearance, the total accumulated clearance is 3mm.

以上就是今天帶給大家的知識，礦用裝載機專注行業(yè)多年，為用戶不斷的提供有價值的內容，更多內容請繼續(xù)關注我們：http://yygsbaby.com

The above is the knowledge brought to you today. Mining loaders have focused on the industry for many years and continuously provide users with valuable content. Please continue to pay attention to us for more content: http://yygsbaby.com