What are the factors that affect the service life of the sprinkler?

Regardless of the importance of the chassis of the sprinkler truck, the most critical parts of the top of the sprinkler are sprinkler pumps and power take-offs, and these two must be used together. In terms of the selection of pumps, the current special vehicles for Hubei Chengli are limited. The company selected the special pump for watering trucks produced by Hangzhou Weilong Pump Co., Ltd. However, its associated power take-off devices suffer from frequent damages and the like. The phenomenon is that they hit teeth, scratch teeth, and break gears. When the power take-off fails, the most direct and obvious result is that the gear pump does not turn, the hydraulic dumping system loses its power source, and the entire system is in a paralyzed state and cannot work. Pneumatic power take-off devices are mostly used on sprinklers. It is mainly composed of three parts: transmission mechanism, connection mechanism and operating mechanism. The most common failure in these three parts is the operating mechanism, which uses solenoid valves to switch air ways. The solenoid valve controls the cylinder of the power take-off device, so as to complete the gear catching and unblocking work of the power take-off device.

Why do sprinkler power takeoffs fail frequently? The reasons are as follows:

Correct matching of sprinkler pumps, power take-offs, and engines is a design factor that guarantees proper operation. These are just the prerequisites for the reliability of the sprinkler. The daily correct operation and use state is the key condition for ensuring the service life of the power take-off. When the speed ratio of the power take-off is fixed, the driver's control of the engine throttle is the key to the operation speed of the water pump. The speed of the water pump directly affects the life of the power take-off. When the rotation speed of the water pump changes within 20% of the soil, the relationship between the flow rate, lift, shaft power and efficiency is Q1/Q2=nl/n2, Hl/H2=(nl/n2)2, Nl/N2=( N1/n2)3, η1≈η2. That is, the flow rate of the water pump is proportional to the rotation speed, and its head pressure is proportional to the square of the rotation speed, and its axis power is proportional to the cube of the rotation speed (when the rotation speed difference is large, the conversion error also increases, especially the efficiency error is greater. It needs to be determined by experiment).

The change of shaft power has less influence on the design of the pump with larger insurance factor, and the impact on the power take-off is fatal. The power output of the power take-off device is generally designed to be 30 kW, which is sufficient to meet the drive and power requirements under normal circumstances. However, the power and speed of the pump should be considered in proportion to the cube, as the power take-off is transmitted 41. The 47 kW is much larger than the designed power of 30 kW, so damage to the power take-off is inevitable at this time. This should cause the power take-off manufacturers and users to attach great importance to it.

Of course, improper operation of the sprinkler user is also the cause of the failure of the power take-off. Therefore, always check the effectiveness of the solenoid valve, sensitivity, circuit safety and switching, if the circuit is all normal, you should also check the working conditions of the cylinder, whether there is no ventilation or leakage phenomenon, if necessary, remove the cylinder inspection . Transmission and connection mechanisms should also be regularly maintained and maintained. When the gear mechanism of the transmission mechanism is not good, the connecting bolts of the fork and the push rod are loose, abnormal sound will occur, check the tightening bolts of various components, and pay attention to checking the condition of the lubricant. Clean the dirt in time to keep the components clean and in good condition. Scratches. In addition, the connection bushing between the power take-off device and the oil pump should also be checked frequently. If it is not firm, damaged, removed, or broken, it should be replaced in time.

Hubei Chengli Special Purpose Vehicle Co., Ltd. is a professional manufacturer of various types of special-purpose vehicles . It has many years of experience in the production of special-purpose vehicles , and has reliable quality and high cost-effectiveness. It ranks first in sales in the same industry. The after-sales service promises to refit part of the three-packs for one year or 10,000 kilometers, allowing you to buy the rest assured and use the rest assured. Time witness quality, contact witness service, purchase witness benefits. We are adhering to the "quality first, the user to the" principle, invites cooperation with the majority of users.

Cheng Li Group specializes in production and sales: sprinkler trucks, garbage trucks, fuel trucks, suction trucks, high pressure cleaning trucks, fire trucks, wreckers and other special models, please call the 24-hour sales hotline (Manager Li)