The early damage of sliding bearing of concrete mixer is much more common than the burning of bearing, so it is very important to prevent the early damage of sliding bearing. The correct maintenance of sliding bearing is not only an effective way to reduce the early damage of bearing, but also a reliable guarantee to prolong the service life of bearing. Therefore, in the daily maintenance and repair of the engine, attention must be paid to the appearance shape of the alloy surface, back, end and edge corners of the bearing. If there are abnormalities or signs of excessive wear, it is necessary to carefully find out the causes and take corresponding measures to improve the working conditions of the bearing, Pay attention to the prevention of early damage of sliding bearing. Under the repeated action of cylinder pressure impact load, the surface layer of sliding bearing has plastic deformation and cold work hardening, locally loses its deformation ability, gradually forms stripes and continues to expand, and then forms pits on the loaded surface layer with the falling off of wear debris.
Generally, when the bearing bush is pitted, the pit first appears, and then the pit gradually expands and causes the cracking of the alloy layer interface. The crack extends along the parallel direction of the interface until it peels off. The main reason for the cavitation of sliding bearing is that the sudden change of the cross section of structural elements such as oil groove and oil hole causes the strong disorder of oil flow, and bubbles are formed in the vacuum area with disordered oil flow, and then cavitation occurs due to the collapse of bubbles due to the increase of pressure.
Cavitation usually occurs in the high load area of the bearing, such as the lower bearing bush of the crankshaft main bearing. The outer circle of the bearing is the relative rotation of the bearing in the seat hole. After the bearing goes to the outer circle, it will not only affect the heat dissipation of the bearing, which is easy to ablate the alloy on the inner surface of the bearing, but also damage the back of the bearing, and burn the bearing in serious cases. The main reason is that the bearing is too short, the tenon is damaged, and the processing or installation does not meet the specifications. Mixer truck, concrete mixer truck, cement mixer truck, mixer truck price, any quality grade of lubricating oil of cement tank truck will change during use. After a certain mileage, the performance deteriorates, which will bring various problems to the engine. In order to avoid failure, the oil shall be changed regularly in combination with the service conditions, and the oil quantity shall be moderate.
When the oil passes through the fine hole of the filter, the solid particles and viscous substances in the oil accumulate in the filter. If the filter is blocked and the oil cannot pass through the filter element, the filter element will be broken or the safety valve will be opened to pass through the bypass valve, and the dirt will still be brought back to the lubrication part, causing engine wear and increasing internal pollution. Concrete mixer chassis. The automobile chassis is the most expensive part of the concrete mixer and the highest maintenance cost in use. The automobile chassis of concrete mixer truck mainly focuses on the engine power and torque, fuel consumption, tires, frame, driving comfort and emission standards of the chassis. Therefore, the concrete mixer truck produced by regular manufacturers is selected to ensure low failure rate, low maintenance cost and low loss cost during the use of the vehicle.
Brake failure can easily lead to car accidents. When you drive a concrete mixer, if the brake fails, please don't panic. You should control the direction according to the road conditions and speed, disengage the high-speed gear, quickly blow a foot of empty oil, and shift the high-speed gear into the low-speed gear.
In this way, the engine will have great traction resistance and reduce the speed rapidly. In addition, when shifting to low gear, the hand brake shall be used in combination, but it shall be noted that the hand brake shall not be tightened or pulled too slowly. If it is pulled too tightly, it is easy to "lock" the brake disc, which is likely to damage the transmission parts and lose the braking capacity; If it is pulled too slowly, the brake disc will be worn and ablated and lose the braking effect.