Vibration roller sprinkler pump analysis

Vibratory roller sprinkler pump directly affects the quality of compaction, construction progress and efficiency. In recent years, the failure of the sprinkler system has been on the rise for a long time and has been on the rise. This has a direct impact on the compaction performance of the double-drum vibratory roller. Therefore, we decompose, analyze and study the sprinkler pumps that are fed back by the market. The following will detail the sprinkler pump analysis process and results. 1. Damaged pump decomposition results and typical photographs 1.1 Decomposition of the pump Decomposition of the damaged sprinkler pump, which is fed back by the market, and a summary of the appearance of the damage, as shown in Table 11.2 Typical photographs of the failure point of the sprinkler pump 2. How the sprinkler system works Figure and pump working principle At present, the pump motor uses a permanent magnet to generate a magnetic field. For a permanent magnet motor, the flux Φ is constant, and the output torque of the motor is proportional to the armature current. Under normal use, when the power supply voltage U remains unchanged, the load increases and the resistive torque increases. The electromagnetic torque of the motor is temporarily less than the resistive torque, and the speed begins to decrease. As the speed decreases, the counter electromotive force E decreases. According to formula I = (U-E) / R shows armature current will increase, so the electromagnetic torque increases until the electromagnetic torque and resistance torque to reach a new balance, the motor began to run at a lower speed than the original. 3. Analysis of the causes of damage To correctly analyze the causes of pump damage, the following table lists the breakdown of the pump after the breakdown of statistics. As can be seen from Table 2, this batch of vibratory roller sprinkler pump actually has five types of failure: a) motor burn motor burn accounted for 25% of all damaged pump, the four pump carbon brush is basically intact, the water inlet are There are debris, 3 pump carbon black positive and negative wiring black. Analysis of the reasons for damage is: water inlet led to pump work load, the motor coil current is far beyond its rated current, the motor burned instantly damage the pump. b) Brush exhausted pump depleted, accounting for 12.5% ​​of all damage to the pump, the two pump casing serious corrosion, brush positive and negative terminals burning black, commutator sintering, sundry debris. Analysis of the reasons for the damage is: the pump has been using for a long time, while the inlet sundries cause the pump workload becomes larger, shortening the pump life. c) commutator sintering In addition to the failure of the pump, the six pump commutator sintering, accounting for 37.5% of all damage to the pump, the pump casing corrosion occurred 4, 4 pump sundry debris. Analysis of the reasons for the damage is: poor water pump, floating in the commutator between the copper powder in the water and the role of electrode ignition burned in the gap between the commutator copper, part of the steering gear Copper direct conduction, armature coil current through the armature coil can not be reduced to prevent rotation of the pump failure. d) Carbon card stuck pump Carbon card stuck accounted for 6.25% of all damage to the pump, the other without exception. Analysis of the reasons for the damage is: early damage, heat pump caused by carbon brush. e) Check valve defective pump Check valve damage accounted for 18.75% of all damaged pumps. Analysis of the reasons for the damage is: early damage, poor sealing of the pump check valve. From the above analysis, it can be found that 75% of the pumps in the pump fail to rust, indicating that the water-proofing pump has poor water-proof performance and is not suitable for the double-drum vibratory roller; 69% of the pumps in the II failed pump have debris or fiberglass , Indicating the water quality into the sprinkler is not clean enough or the glass of the water tank is easy to fall off. 4. Improvement measures 1) Selection of new motor pump Selection of new motor pump, with water resistance, to avoid corrosion of pump motor wire connector caused by heat to carbon brush sintering. 2) improve the working environment of the pump a) to improve the working environment of the pump, the pump away from the water mist: b) to improve the cooling capacity of the pump environment, so that the pump at low temperature; 3) to improve the pump suction filter a) Suction ports provide clean water; b) Increase water passage capacity of the water filter. 4) Improve the water quality of the water tank a) Mark the water quality of the water tank b) Select the plastic water tank to solve the problem of the glass filament falling inside the glass water tank. 5) increase the tank cleaning mouth tank to increase the cleaning port, easy to clean sediment or suspended solids at the bottom of the tank. 6) increase the safety settings through the electrical control system to increase the pump safety protection or alarm device, to ensure that the pump in a safe current work. 5. Conclusion In this paper, the market feedback of the pump was decomposed, research, analysis, to find out the more intuitive causes of damage, the main reason for the pump damage is that the water pump is poor, so: for this analysis we should carry out the following Work: 1) Change the ventilation capacity of the pump on the double-drum vibratory roller, keep it away from damp environment, the water outlet of the water tank should be led out to avoid splashes during water-proof, to ensure the pump work under dry and good ventilation conditions; 2) Can not be changed or the structure is limited, new pump should be used to improve the water pump anti-rust ability to adapt to the use of double-drum vibration roller environment. Vibration roller sprinkler pump analysis Xugong Institute Hu Chunjun Xia Panfu Vibratory roller watering system has a direct impact on the quality of compaction, construction progress and efficiency. In recent years, the failure of the sprinkler system has been on the rise for a long time and has been on the rise. This has a direct impact on the compaction performance of the double-drum vibratory roller. Therefore, we decompose, analyze and study the sprinkler pumps that are fed back by the market.

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