1. Conduct regular testing and diagnosis of Rexroth piston pumps
According to the listening and collecting signals, the western line diagram of the online working performance of the Tule Pillar Jiquan was made, and the evaluation report was made. Based on the results of home monitoring, it is decided whether to repair the Rexroth plunger atmosphere. In this way, the optimal maintenance period of the Piston Pump is determined, which avoids excessive maintenance in preventive maintenance and greatly reduces costs. Increasing the soft life of Rexroth piston pumps reduces downtime costs.
The technical status monitoring and maintenance system replaces the past regular maintenance system, and also replaces the past manual patrol inspection, that is, the temperature and vibration of the Rexroth piston pump casing by hand, and the old-fashioned method of hearing whether the noise emitted when the Schroth piston pump rotates is larger than before, especially the technical maintenance based on personal experience of equipment spot inspection, rather than the maintenance based on advanced detection and scientific standards
2. The monitoring and diagnosis device is a means of fault diagnosis
The new methods of rewarding the township can be divided into two categories: portable and simple diagnosis and new diagnosis and listening. The main reasons for the pre-water of the Liluli 10 Le Plug Pump are the decrease of Leli, the decrease of flow rate, the rise of temperature, the timeout of variable speed, the increase of sound and vibration, and the excessive leakage in the Litule Piston Pump. When testing different parameters, different measurement methods, tools and instruments should be selected according to the actual conditions, site conditions and accuracy requirements reflected by the hydraulic Tule piston pump.
The principle of the Litule piston pump homeland diagnostic device is detected by vibration diagnosis, analyzed and processed by microcomputer and made a homeland forecast. The internal wear of the Rexroth piston pump can be directly detected from the outside of the Rexroth piston pump relatively quickly, so as to effectively prevent the failure of the Rexroth piston pump and improve the reliability of the main engine.
The hydraulic tester is composed of a flow rate, a pressure gauge and a thermometer, which can be connected to the discharge port of the Rexroth piston pump, and the flow rate of the piston pump outlet at all levels is detected by adjusting the functions of the instrument, and the total efficiency curve of the Piston pump is drawn. When the total efficiency of Rexroth's piston pump dropped to 72%, it had to be repaired offline.
The tester is connected with the oil drain port of Rexroth piston pump to detect the internal leakage of Rexroth piston pump. The leakage of the Piston Pump changes with the online use time, and within a fixed cycle time, the change of the leakage can be determined accordingly to know the change of the operating state of the Piston Pump affecting the normal operation of the system, and the curve of the leakage change with time is called the state curve, which can be used as the evaluation index of the working status of the Rexroth Piston Pump, which can be used for fault prediction and the determination of the maintenance period
Drawing and analysis of leakage curve in Litule Dussel pump. The dead leakage curve of Rexroth plunger was drawn with the horizontal coordinates of the operating time of the Rexroth piston pump and the internal leakage volume and volumetric efficiency as the longitudinal coordinates. If the leakage exceeds 50% of the normal value, it must be repaired offline.
3. Check the current value of the piston pump of Ligongle
The large-scale hydraulic station in the metallurgical industry is composed of a hydraulic system composed of a plural piston pump and is equipped with a large accumulator group, if there is a large leakage in the piston pump or can not reach the working jade force, the pressure and flow hazards of the entire hydraulic system can not be immediately revealed, and the inspection personnel must check the current value on the ammeter and make a record of the working Rexroth plunger system every day. If the working pressure of one of the Rexroth piston pump group is lower than that of the other Rexroth piston pump, the current value of the low pressure Rexroth piston pump is lower than that of the normal working Rexroth piston pump, that is, the Rexroth piston pump with less work requires lower current than the Rexroth piston pump with normal work.
Measure Rexroth plunger casing temperature4
The leakage in the hydraulic pressure Tule piston pump is large, and the increase of the friction auxiliary courtyard in the Litule piston pump causes the leakage of pressure oil, and the leakage of pressure oil is converted into heat energy, which will cause the temperature difference between the Litule plunger pump casing and the normal force Shangle plunger pump casing. If the bearing in the Litule plunger pump is fatigued and worn, the bearing is heated and accompanied by noise, the heat will be shown on the surface of the Litule plunger pump casing, and the above two heating phenomena are detected and compared with the "infrared electronic thermometer", and the surface temperature of the Rexroth Dusser pump casing will be higher than the normal working hydraulic pressure of the Lux Roth Dusail pump casing
The inspector should use the "electronic thermometer" every 4 hours to measure the temperature of the main exterior of the Litule piston pump, the middle of the Litu piston pump shell, and the back cover of the Litu piston pump, and mark the temperature record on the temperature rise curve table of the Rexroth Dusse pump, which can be provided to the technicians at the same time as the monitoring and diagnosis data table of the Litule piston pump, so that the technicians can make a correct judgment on the Litule piston pump.
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