Water Pump Rotor Communication Channel for Bearing Lubrication
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Solution Overview
Problem
Conventional electric water pumps experience poor lubrication and abnormal noise/vibration due to fluid flow issues and pressure differences at the bearings, affecting the smooth operation of the rotor and impeller.
Innovation Solution
The water pump design includes a lower casing with a recessed rotor accommodation part, a lower bearing mounting part, and an upper casing with a cooling hole and communication channels to improve lubrication and reduce pressure differences between the upper and lower sides of the rotor, featuring a rotor with a communication channel connecting the impeller and rotor ends, and a protruding rib on the rotor accommodation part to enhance fluid flow and reduce noise/vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional electric water pump structure is used, then the pump can circulate coolant, but the bearings are not smoothly lubricated and abnormal noise and vibration occur due to fluid pressure difference
Solution Approach 1:
The pump housing is divided into upper and lower sections with separate bearing mounting parts, allowing independent optimization of fluid flow paths to each bearing. The communication channels are segmented to direct fluid flow specifically to lubrication points, separating the lubrication function from the general pumping function.
Solution Approach 2:
Communication channels act as intermediaries to transport fluid from the impeller region to the bearing mounting parts. These channels mediate between the high-pressure fluid source and the bearing lubrication points, ensuring proper fluid distribution while balancing pressure differences.
2Productivity
If the rotor and impeller rotate at high speed, then pumping efficiency increases, but abnormal noise and vibration increase due to pressure difference between upper and lower sides
Solution Approach 1:
The harmful pressure difference is extracted and addressed by providing separate fluid pathways for the upper and lower bearing mounting parts. The communication channels extract fluid from the impeller region and distribute it to balance pressures on both sides of the rotor assembly, removing the source of noise and vibration.
Solution Approach 2:
The fluid pressure distribution parameters are changed by introducing communication channels that adjust the pressure balance between upper and lower sides of the rotor. This modifies the pressure parameters to reduce the pressure difference that causes noise and vibration during high-speed operation.
3Device complexity
If simple bearing mounting structure is used, then device complexity is reduced, but lubrication action is not smooth due to poor fluid flow to bearings
Solution Approach 1:
The bearing mounting parts are merged with the pump housing structure, integrating the lubrication function into the existing housing design. The communication channels are formed as integral features of the housing, combining structural support and fluid distribution functions without adding separate complex lubrication systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively smooths the lubrication action of the bearings and reduces pressure differences, minimizing abnormal noise and vibration during the rotation of the impeller and rotor, enhancing the overall operational efficiency of the water pump.
Implementation Method 1
the upper bearing mounting part is provided with a cooling hole vertically penetrating through the inside and outside of the upper bearing mounting part
Implementation Method 2
The rotor may be provided with a communication channel penetrating up and down, and an inlet side of the impeller coupled to an upper end of the rotor and a lower end side of the rotor may communicate with each other by the communication channel
Implementation Method 3
a lower bearing is coupled to an inside of the lower bearing mounting part; an upper bearing is coupled to an inside of the upper bearing mounting part; both ends of a rotary shaft rotatably coupled to the lower bearing and the upper bearing
Data Source
AI summary
The present disclosure relates to a water pump in which a channel is formed so that a fluid introduced through an inlet side passes through a bearing part and a channel inside the rotor accommodation part and the rotor is formed so that the fluid may circulate, so a lubricating action of a bearing rotatably coupled to the rotor is smoothed and a pressure difference between upper and lower sides of an assembly of the rotor and an impeller assembly is reduced, thereby reducing abnormal noise and vibration in the bearing part.