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一、N-300型汽轮机组注油器概况注油器是一种喷射泵,它以高压油为动力抽吸油箱中的油供离心式主油泵进油和轴承的润滑油。这种注油器被广泛用于汽轮机的供油系统中,国产2.5～30.0万千瓦的汽轮机组均有采用。以往中、小机组的注油器的压比较高,而N-300型汽轮机主油泵出口压力达20公斤/厘米~2,注油器的压比要比中、小机组小一半以上,因此,按原设计方法设计的N-300型汽轮机组注油器在运行中噪音大(105分贝),效率低(11～16％),汽蚀较严重等,特别是主油泵因正常工作流量低于设计流量较多、油泵叶轮型线不佳而引起主油泵叶轮严重汽蚀。
First, the N-300 Turbine Oiler Overview Oiler is a jet pump, which uses high-pressure oil as the power of the suction tank sump centrifugal oil pump oil and bearing oil. This oiler is widely used in steam turbine oil supply system, domestic 2.5 ~ 300,000 kilowatts of steam turbine are used. In the past, the pressure of the small unit of the oiler pressure is relatively high, while the N-300 turbine main pump outlet pressure of 20 kg / cm ~ 2, oiler pressure ratio than medium and small units more than half, therefore, according to the original The design of N-300 steam turbine unit designed for oil turbines in operation noise (105 decibels), low efficiency (11 ~ 16%), more serious cavitation, etc., especially the main pump due to the normal work flow is lower than the design flow rate More, poor impeller profile caused by the main pump impeller serious cavitation.