1、 Usage conditions
This product is mainly used in the thin oil circulation system of chemical machinery equipment. Its working medium viscosity grade is N22-N460 (equivalent to ISOVG22-460) industrial lubricating oil. The cooling device adopts a tubular oil cooler and the nominal oil supply pressure of the thin oil lubrication device is 0.5MPa; The filtration accuracy is 0.08mm when the viscosity is low; 0.12mm at high viscosity; Cooling water temperature ≤ 32 ℃; Cooling water pressure ≤ 0.4Mpa; When the inlet oil temperature of the cooler is 50 ℃, the oil temperature drops by ≥ 8 ℃, and the steam pressure is 0.2~0.4Mpa; The pump port pressure should be greater than 0.63Mpa. When the resistance of filters, coolers, etc. reaches high values, if the oil supply pressure is 0.5Mpa, the pump port pressure needs to be increased.
This product is suitable for explosion-proof applications.
2、 Working principle
The oil is discharged from the oil pump through a one-way valve, a shut-off valve, a double tube mesh filter, and an oil cooler, and then directly flows to the lubrication point. It then flows back to the oil tank through the return oil filter along the system's return main pipe. The nominal pressure of the pump should be greater than 0.63MPa (i.e. the outlet pressure of the pump), and the oil supply pressure of the thin oil lubrication device is 0.5Mpa (i.e. the outlet oil port pressure). The thin oil lubrication device is equipped with a pressure tank, and its gas source pressure is 0.5-0.6MPa.
During normal operation, one toothed rotary pump is in operation and the other is on standby. It is controlled to be used alternately through a switch. The outlet of the pump is equipped with a safety valve to avoid overloading of the oil pump. The set opening pressure of this valve is 0.63Mpa or slightly higher. The pressure of the system is controlled by a pressure switch. The main engine can only start when the system pressure reaches the normal set value. When the system pressure is lower than a certain set value, the backup pump will automatically start until the pressure returns to normal.
