Page 92 - 《橡塑技术与装备》英文版2026年1月

HINA R&P TECHNOLOGY AND EQUIPMENT

Figure 3 Control program and setting interface of electric grease pump

stationary ring and the rotating ring. The process lubrication output voltage of the solid-state relay decreases, and the output
pump is used for lubricating the gap between the rotor end face power of the heater decreases. As the liquid level changes, the
and the wear plate. The appearance is shown in Figure 4. corresponding set of heaters is started or stopped. Because
there is a need to collect many signals such as pressure and
flow rate, thin oil lubrication centers are generally equipped
with control boxes, as shown in Figure 5, which illustrates
the internal structure of a thin oil lubrication center control
box. Nowadays, more and more thin oil lubrication centers
are starting to be equipped with CPUs and human-machine
interfaces, along with network interfaces. This allows them
to work independently or in conjunction, providing better
scalability and compatibility.

Figure 4 Outline of the thin oil lubrication center

Similar to the material cylinder of an electric grease
pump, the material cylinder of a thin oil lubrication system is
also mostly made of transparent materials, which facilitates
the observation of the amount of oil inside the cylinder. A level
gauge and a refueling solenoid valve are installed on the top
of the material cylinder, and the solenoid valve is externally
connected to an oil pipe. When the ambient temperature is too
low, the fluidity of the oil in the storage tank is poor, which
will affect the lubrication effect and also have an impact on the
Figure 5 Internal structure of control box
service life of the pump. Some lubrication centers will install
a ring heater in the material cylinder (made of steel). At low After being pressurized by the oil pump, lubricating oil
temperatures, the heating system of the storage tank is activated and process oil are delivered to various parts of the internal
to heat the oil inside the storage tank. The heater is controlled mixer through high-pressure oil pipes, as shown in Figure 6.
by a solid-state relay. As the oil temperature approaches the set The thin oil lubrication system of the internal mixer has
temperature, the control system performs PID control on the unique functions. During rubber mixing, leakage of carbon
heating power. As the temperature gradually approaches, the black and other substances can damage the sealing ring,

·46· Vol.52，No.1