Filling and sealing structure of axially split pump

Abstract

The invention relates to the sealing field of split pumps, in particular to a filling and sealing structure of split pumps, which includes a shaft sleeve arranged on a shaft, a pump body is arranged on the shaft sleeve, and a There is a packing retainer docked with the outside of the pump body, the packing retainer is connected with a packing gland matching it, and a sealing cavity is formed between the packing gland and the packing retaining sleeve, and a packing ring is arranged in the sealing cavity and packing, the packing ring and the flushing hole provided on the stuffing retainer butt, the outer side of the packing retaining sleeve is provided with a water tank communicating with the flushing hole, and the water tank communicates with the flushing pipe; the purpose of the present invention is Provide a filling and sealing structure for split pumps, set a cylindrical packing retainer, and set a water tank connected to it on the outside of the packing retainer, and connect the water tank to the washing pipe to make the position of the sealing chamber closer The impeller is improved, the bearing span is reduced, and the deflection of the shaft is guaranteed to be in a safe range.

Description

technical field [0001] The invention relates to the sealing field of split pumps, in particular to a filling and sealing structure of split pumps. Background technique [0002] A split pump is a hydraulic component that converts a low-pressure medium into a high-pressure medium. Therefore, good sealing is required, and the seal of the pump body is an important part of the split pump seal. [0003] The existing split pumps generally purchase S and SH type split pump structures. Due to the special hydraulic model of the split pump, the water flow is sucked into the impeller from both sides of the impeller at the same time, so the suction chamber is wider, resulting in a larger bearing span. When the bearing span When the distance is large, the radial force generated by the impeller will act on the shaft when the pump is running, forming a large deflection. The larger the bearing span, the greater the deflection; the shaft is prone to mechanical fatigue after deformation due to...

AI Technical Summary

Problems solved by technology

[0003] The existing split pumps generally purchase S and SH type split pump structures. Due to the special hydraulic model of the split pump, the water flow is sucked into the impeller from both sides of the impeller at the same time, so the suction chamber is wider, resulting in a larger bearing span. When the bearing span When the distance is large, the radial force generated by the impeller will act on the shaft when the pump is running, forming a large deflection. The larger the bearing span, the greater the deflection; the shaft is prone to mechanical fatigue after deformation due to deflection ;The bearing will also be in an abnormal stress state due to the deflection generated by the shaft, so the bearing is prone to heat, the bearing life is shortened, and even serious product quality problems such as broken shaft occur.

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