(1) when the temperature of the working liquid increases, the viscosity of the working liquid decreases, the leakage of the pump increases, and the actual flow rate of the pump decreases.(2) the seals of hydraulic systems and components deteriorate at high temperature, the elastic denaturation ability decreases, the sealing performance decreases, even the seal fails, and the leakage increases.

The noise of the gear pump is mainly the aerodynamic noise produced by the gas or liquid during transportation, the structural noise caused by the vibration of the motor housing, the noise caused by the vibration of the machine base, and the noise of the motor. The peak of this kind of noise level is mainly concentrated in the low octave band, about 100-450Hz. The sound source belongs to steady-state noise when the gear pump room is running normally.

The following article describes the difference between hot oil pumps and cooling oil pumps

Due to the long-term contact operation of the heat oil pump, the oil in the bearing chamber is not often changed by the user in the course of use, which leads to the long-term high-speed operation of the bearing in the case of poor lubrication conditions, resulting in the damage of the heat conduction oil pump bearing, which leads to the noise of the heat conduction oil pump.

Single face seal: using injection flushing, the washing solution is reduced second-line wax oil at about 100C, and the pressure is higher 0.05~0.15Mpa than that in the sealing cavity. Hot water (soft water) is used for rapid cooling on the outside of the gland. It can generally be used for one cycle (ten months).

Single butterfly curve type: this series of pumps are specially designed and manufactured to solve the problem of conveying large granular materials, and its unique shape and curve form enable it to have incomparable advantages over other pumps when transporting large granular materials. It can effectively avoid particle damage in the process of conveying materials, and it is the first choice for conveying materials containing particles.