ZYB type supercharged fuel pump is suitable for conveying various lubricated liquids. The temperature is not higher than 70 °C. If high temperature is 200 °C, it can be used with high temperature resistant materials. The viscosity is 5×10-5～1.5×10. -3m2/S ZYB type booster fuel pump needs to pay attention to during operation. ZYB type booster fuel pump is suitable for conveying various lubricated liquids. The temperature is not higher than 70 °C. If high temperature is 200 °C, It can be used with a high temperature resistant material and has a viscosity of 5 x 10-5 to 1.5 x 10-3 m2/s. ZYB type supercharged fuel pump is not suitable for conveying corrosive, hard particles or fibers with high volatilization or low flash point, such as gasoline and stupid. This article mainly introduces the matters needing attention in the operation of ZYB type supercharged fuel pump:
1. Repair of the end face of the ZYB type supercharged fuel pump and the wear of the pump cover There is a certain gap between the end face of the gear and the inner plane of the pump cover, which is called the end face clearance. The wear caused by the contact surface between the gear end face and the inner surface of the pump cover during operation will increase the gap of the end face, and when the limit is exceeded, the pump oil quantity will have a significant influence.
When the end face of the gear is worn, the end face can be flattened, and at the same time, the decomposition surface of the oil pump casing is grinded, and the surface of the pump is ensured to be within the required range.
2. Repair of the booster fuel pump drive shaft and bushing after wear Because of the weight of the booster pump drive gear and the radial thrust generated by the passive gear meshing, it is easy to cause the shaft and bushing holes to be eccentric, and the clearance is increased. Therefore, during operation, the gear pump will leak due to the increase of the clearance, and the oil supply will be reduced.
After the drive shaft and bushing are worn, the trimming or trimming method can be used to restore the fit clearance. When the journal wear is slight, it is only necessary to press out the old bushing and replace it with a new bushing, and the shaft can generally not be repaired, so that the matching clearance can be restored to the allowable range. When the shaft and bushing wear is very serious, when the matching clearance is greatly increased, not only the bushing needs to be replaced, but also the shaft is also chrome-plated or vibrated to increase the diameter, and then ground to the standard size to restore the journal and Bushing requirements.
3. Repair of the inner cavity of the pump casing and the wear of the gear After the inner cavity of the pump casing and the gear wear, the pump oil volume is greatly affected. Gear pump When the shaft and bushing or shaft hole wear is severe, the tooth top and the inner surface of the pump casing will have undue contact during operation. Moreover, since the oil discharge chamber is higher than the pressure in the oil inlet chamber, under the pressure difference, the tooth tip contacts more with the oil inlet chamber of the pump casing, so the inner cavity of the pump casing wears more here, so that the inner cavity and the tooth The top gap increases. As a result, the pressure difference between the inlet and outlet chambers of the booster pump is reduced, so that the gear scraping and oil pressure are reduced, resulting in a decrease in the oil supply pressure and a decrease in the pump oil amount. The wear of the inner cavity of the pump casing is generally repaired by the cavity setting method.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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