We all know that the tunnel loader brings us a lot of convenience, but it will also do great harm if it is not operated properly. Let's explain it to you below:

隧道裝載機啟動時剛啟動就猛轟油門：發(fā)動機剛啟動時，機身溫度低、機油黏度大、流動性差，機油在短時間內(nèi)不能暢流各潤滑點。如果此時猛轟油門，會導(dǎo)致發(fā)動機轉(zhuǎn)速瞬時升高，盡管機油泵的供油量和壓力也會增加，但瞬間不能滿足各運動副對潤滑油量和油壓的要求，運動副不能建立很好的潤滑油膜，產(chǎn)生瞬間干摩擦，導(dǎo)致劇烈磨損。

When the tunnel loader is started, it slams the accelerator as soon as it is started: when the engine is just started, the body temperature is low, the oil viscosity is large, and the fluidity is poor, so the oil can not flow smoothly to all lubrication points in a short time. If the accelerator is slammed at this time, the engine speed will increase instantaneously. Although the oil supply and pressure of the oil pump will also increase, it can not meet the requirements of each moving pair for lubricating oil quantity and oil pressure. The moving pair can not establish a good lubricating oil film, resulting in instantaneous dry friction, resulting in severe wear.

隧道裝載機各運動副潤滑不良，運行阻力也會增大，如果猛轟油門，活塞、連桿、曲軸會產(chǎn)生劇烈撞擊，加速機件的損壞。此外，對配有渦輪增壓器的柴油機，極易因不良潤滑而破壞油封，導(dǎo)致渦輪增壓器故障，降低柴油機功率。因此，裝載機啟動后，應(yīng)平穩(wěn)低速運轉(zhuǎn)，嚴禁轟油門。

The motion pairs of the tunnel loader are poorly lubricated and the running resistance will increase. If the accelerator is slammed, the piston, connecting rod and crankshaft will collide violently and accelerate the damage of the parts. In addition, for diesel engines equipped with turbochargers, it is very easy to damage the oil seal due to poor lubrication, resulting in turbocharger failure and reducing the power of diesel engines. Therefore, after the loader is started, it shall run smoothly and at a low speed, and it is strictly prohibited to blow the accelerator.

隧道裝載機作業(yè)過程中補充冷卻水冷卻水不足，將導(dǎo)致柴油機缺水過熱。直接補充冷卻水，整個冷卻系統(tǒng)瞬間會產(chǎn)生大的溫差，使缸蓋、缸套、缸體等瞬間脆裂，產(chǎn)生微裂紋，逐漸滲漏冷卻水，以致漏油、漏氣。因此，當(dāng)柴油機溫度過高時，應(yīng)以稍高轉(zhuǎn)速空載運轉(zhuǎn)，待水溫下降50℃左右時，再熄火，擰松散熱器蓋，排出水蒸氣，緩慢注入冷卻水。

During the operation of tunnel loader, insufficient supplementary cooling water will lead to water shortage and overheating of diesel engine. When the cooling water is directly supplemented, the whole cooling system will produce a large temperature difference in an instant, which will make the cylinder head, cylinder liner and cylinder block brittle and produce microcracks, and gradually leak the cooling water, resulting in oil and air leakage. Therefore, when the temperature of the diesel engine is too high, it should run at a slightly higher speed without load. When the water temperature drops to about 50 ℃, turn off the engine, loosen the radiator cap, discharge water vapor and slowly inject cooling water.

帶負荷停機隧道裝載機或作業(yè)后立即停機裝載機帶負荷停機或作業(yè)后立即停機，冷卻系統(tǒng)隨即停止工作，散熱能力急劇下降。工作產(chǎn)生的大量熱量不能及時散發(fā)，使受熱部件的冷卻水沸騰，機件過熱，高溫?zé)g。同時還會使附著其表面的機油變質(zhì)，造成下次啟動困難。

Stop the tunnel loader with load or immediately after operation. When the loader stops with load or immediately after operation, the cooling system stops working immediately, and the heat dissipation capacity decreases sharply. A large amount of heat generated by work cannot be dissipated in time, which makes the cooling water of heated parts boil, the parts overheat and ablate at high temperature. At the same time, it will also deteriorate the oil attached to its surface, resulting in difficulty in starting next time.

此外，隧道裝載機帶增壓的柴油機，若突然停機，會使增壓器升溫600℃左右，易造成密封環(huán)損壞。因此，裝載機在熄火前應(yīng)卸除負荷，并空載運轉(zhuǎn)3～5 min，使機溫降40℃以下，水溫降50℃以下時，方可停機。

In addition, if the supercharged diesel engine of tunnel loader stops suddenly, the supercharger will rise to about 600 ℃, which is easy to cause damage to the sealing ring. Therefore, before flameout, the loader shall unload the load and operate without load for 3 ~ 5 minutes to reduce the machine temperature to below 40 ℃ and the water temperature to below 50 ℃.

停機前猛轟油門不少駕駛員誤認為停機前猛轟幾腳油門，可使多余未燃燒的柴油留在氣缸中，以利于下一次啟動。其實這會造成燃燒不完全、冒黑煙、積炭增多;同時猛轟幾腳油門會使運動件慣性力突然增大，加劇運動副的磨損;其次未燃盡的燃油將順著缸壁流入油底殼稀釋機油，縮短機油使用周期。因此，正確的操作是，無負荷狀態(tài)下中低速平穩(wěn)運轉(zhuǎn)后停機。

Slamming the throttle before shutdown many drivers mistakenly believe that slamming a few feet of throttle before shutdown can leave excess unburned diesel in the cylinder for the next start. In fact, this will cause incomplete combustion, black smoke and increased carbon deposition; At the same time, slamming several foot throttle will suddenly increase the inertia force of moving parts and aggravate the wear of moving pairs; Secondly, the unburned fuel will flow into the oil pan along the cylinder wall to dilute the oil and shorten the service life of the oil. Therefore, the correct operation is to shut down after smooth operation at medium and low speed under no-load state.

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