The high temperature of Roots blower may be caused by too much and too thick oil in the oil tank.

The high temperature of Roots blower may be caused by too much, too thick, dirty oil in the oil tank or filter or muffler blockage; The pressure is higher than the specified value; The impeller is excessively worn with large clearance; Poor ventilation, high indoor temperature, low running speed, belt slipping. Can cause the inlet temperature of Roots blower to be too high;

The reason for the high temperature of Roots blower is that the gear end has poor tooth engagement or the side clearance is too small, which causes the fan to heat up. The solution is to adjust the tooth engagement of the gear pair; If the lubricating oil temperature is too high, the solution is to check whether the oil is normal and the cooling system; The lubricating oil is too dirty. The solution is to clean the lubricating system and replace the bearing gear with new oil;

If the system resistance is too high or the intake air temperature is too high, the solution is to adjust the system operation; The wear of the two rotors of the fan increases the fit clearance of the fan, resulting in eddy current during operation. The solution is to repair the rotor and adjust the clearance. Roots blower is divided into horizontal type and vertical type.

The horizontal roots blower is composed of two involute waist shaped rotors (hollow or solid), a oblong casing and two parallel shafts. The casing can be divided into three types: water cooling, air cooling and no cooling device. The transmission mechanism is equipped with two gears of the same style and size at the same end of the two shafts, which are meshed with each other, so that the driving shaft is directly connected with the motor, and the driven shaft rotates in the opposite direction through the gear drive. Each rotor rotates for one circle to exhaust air of twice the shadow volume, so the air of four times the shadow volume is exhausted every time the driving shaft rotates for one circle. The reasonable layout of the inlet and outlet of Roots blower should be: the upper end of the intake air and the lower end of the exhaust air (for horizontal type), so that high-pressure gas can be used to offset the gravity of part of the rotor and shaft, reduce the bearing pressure, and reduce wear. According to these conditions, corresponding cooling measures can be taken when the temperature of Roots blower is too high, so as to ensure the normal operation of Roots blower and avoid unnecessary losses caused by machine failure due to excessive temperature. The patented Roots blower equipment widely used in power, steel, cement, paper and other industries, because the conveyed gas medium contains a large number of hard dust particles and acid gas, the flow passage parts of these equipment are strongly eroded and corroded, especially the blade wheel, the heart part, which runs at the end of its blade at a linear speed of 160 meters per second, The wear rate is more serious than other parts. According to statistics, the service life of impellers made of ordinary carbon steel or ordinary wear-resistant steel 16Mn is only half a year, and the shortest one is only dozens of days. Although various surface anti-wear measures such as surfacing, spraying, spray welding, coating polymer wear-resistant materials have been used, the service life is difficult to be significantly improved.

A certain clearance shall be connected between two impellers of Roots blower, between impellers and wallboard, and between impellers and casing to ensure normal operation of Roots blower. If the clearance is too small, the wind turbine will vibrate, fever and abnormal sound. The reason why such clearance is too small is that during the maintenance phase of the equipment, the maintenance personnel did not adjust the locating pin between the gear ring and the gear hub according to the matching service of the gear, the center to center service and the center to center error of the gear box shaft hole, resulting in inaccurate positioning size of the locating pin, which affects the tooth side clearance of the gear and the clearance between the impellers.

Assuming that the positioning dimension of the positioning pin is accurate, it is because the gaps between the impellers, between the impellers and the wallboard, between the impellers and the casing of the roots blower have not been adjusted in a standard way according to the gap adjustment method of the roots blower, which results in too small gaps between the impellers or between the impellers and the wallboard, between the impellers and the casing of the roots blower, causing the vibration of the fan Fever and abnormal sound seriously affect the smooth operation of the fan