Structural improvements of A vertical Suspended long shaft semi submersible sump pump

Structural improvements of A vertical Suspended long shaft semi submersible sump pump

A vertical Suspended long shaft semi submersible sump pump, comprising a pump lower end air bag sealing component, a pump upper end air bag sealing component, and a transmission shaft. The transmission shaft passes through the pump lower end air bag sealing component and the pump upper end air bag sealing component axially. An impeller is provided between the pump lower end air bag sealing component and the pump upper end air bag sealing component, and the impeller side is a water outlet pipe. A filter screen is provided outside the pump lower end air bag sealing component, and a lifting pipe is provided around the pump upper end air bag sealing component. A packing box and a coupling are provided on the transmission shaft, and an electric motor is connected to the upper part of the transmission shaft. The beneficial effects of this technical method include replacing traditional mechanical seals with air sealed components, isolating the rolling bearings from the outside world, achieving zero leakage, and ensuring that strong acids, alkalis, and high temperatures from the outside do not affect the normal use of the pump. The rolling bearings are durable and the overall operating cycle of the pump is extended.

[Technical Introduction]

The impeller and multiple transmission shafts of traditional vertical Suspended long shaft semi submersible sump pumps are immersed in media containing strong acids, alkalis, and various mechanical impurities. In order to overcome the radial swing of the shaft, sliding bearings are used. Over time, the service life of the pump is very short. Many efforts have been made both domestically and internationally to improve the structure or material of sliding bearings, but none have been able to fundamentally solve this problem. The latest method in China recently is to install mechanical seals near the impeller at the lower end of the pump. It has been proven to have a certain effect, but the quality of the mechanical seal is directly related to its effectiveness. However, mechanical seals cannot achieve zero leakage, and long-term accumulation will inevitably cause the rolling bearing parts of the guide shaft to be immersed in the medium, which is very dangerous. In summary, the core of this technical solution is how to improve the unreliable mechanical seal and prevent the medium from entering the rolling bearing of the guide shaft in order to enable the vertical long axis semi submersible sump pump to operate for a long period of time.

Technical implementation ideas

In response to issues in related technologies, this technology proposes a vertical long axis semi submersible sump pump that can extend the overall operating cycle of the pump. To achieve the above technical objectives, the technical solution of the present technology is as follows: a vertical long axis semi submersible sump pump, comprising a pump lower end air bag sealing component, a pump upper end air bag sealing component, and a transmission shaft, wherein the transmission shaft passes through the pump lower end air bag sealing component and the pump upper end air bag sealing component axially, an impeller is provided between the pump lower end air bag sealing component and the pump upper end air bag sealing component, the impeller side is the outlet pipe, a filter screen is provided outside the pump lower end air bag sealing component, a lifting pipe is provided around the pump upper end air bag sealing component, a packing box and a coupling are provided on the transmission shaft, and an electric motor is connected to the upper part of the transmission shaft; The upper air bag sealing component of the pump comprises a hollow shaft and an isolation cover. The hollow shaft is fixed on the flange of the lifting pipe through a hollow shaft positioning pin. The upper end of the hollow shaft is provided with a rolling bearing, and the outer side of the rolling bearing is provided with a bearing housing. A sealing ring is provided between the bearing housing and the transmission shaft, and the sealing ring is connected to the shaft through a shaft.

A vertical Suspended long shaft semi submersible sump pump [Technical Key Points]

A vertical Suspended long shaft semi submersible sump pump, characterized by comprising a pump lower end air bag sealing component (17), a pump upper end air bag sealing component (21), and a transmission shaft (6), wherein the transmission shaft (6) passes axially through the pump lower end air bag sealing component (17) and the pump upper end air bag sealing component (21), and an impeller (18) is provided between the pump lower end air bag sealing component (17) and the pump upper end air bag sealing component (21), and the side of the impeller (18) is a water outlet pipe (19). A filter screen (16) is provided outside the pump lower end air bag sealing component (17), and a periphery of the pump upper end air bag sealing component (21) is provided. There is a lifting pipe (20), and the transmission shaft (6) is equipped with a packing box (22) and a coupling (23). The upper part of the transmission shaft (6) is connected to an electric motor (24); The upper air bag sealing component (21) of the pump comprises a hollow shaft (2) and an isolation cover (4). The hollow shaft (2) is fixed to the flange plate (1) of the water lifting pipe through a hollow shaft positioning pin (5). The upper end of the hollow shaft (2) is provided with a rolling bearing, and the outer side of the rolling bearing is provided with a bearing housing (9). A sealing ring (10) is provided between the bearing housing (9) and the transmission shaft (6). A conical PTFE sealing ring (12) is provided on the upper part of the sealing ring (10), and a cover (11) is provided above the isolation cover (4). The cover (11) is fixed to the bearing housing (9) by a cover screw (14). The lower end of the isolation cover (4) is connected to a retaining ring (3), and an emergency alarm for medium intrusion is fixed on the isolation cover (4).