Method for Improving Angle Adjustment Accuracy and Reliability and Durability of Mechanical Fully Adjusting Mechanism of Water Pump
A fully adjustable, mechanical technology, applied in computer-aided design, geometric CAD, calculation, etc., can solve the problem of large hydraulic moment of vane-type mixed-flow pump blades, reduced adjustment force and release bearing force, and poor reliability and durability of release bearings and other problems, to achieve the effect of clear principle, improved angle adjustment accuracy, and extended operating life
Active Publication Date: 2021-06-25
YANGZHOU UNIV
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The present invention aims at the above-mentioned problems of large and medium-sized mechanical fully adjustable axial flow pumps and guide vane type mixed flow pump blades with large hydraulic torque, large adjustment force, large angle adjustment error and poor reliability and durability of the separation bearing, and proposes a mechanical full adjustment mechanism for water pumps. The method of angle adjustment accuracy and reliability and durability, by optimizing the position of the impeller blade shaft, improving the adjustment mechanism and reasonably selecting the release bearing, reduces the adjustment force and the force on the release bearing, and improves the adjustment accuracy of the mechanical full adjustment mechanism and the release bearing. reliable durability
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0069] The present invention will be further described below in conjunction with accompanying drawing:
[0070] A large vertical axial flow pump in a pumping station, impeller diameter Φ1640mm, impeller hub diameter Φ820mm, impeller has 4 blades, blade design angle 0°, blade angle adjustment range: -4°~+6°, speed 250r / min, the pump The design head of the device is 6m, and the design flow rate is 10.6m 3 / s. The blades are made of stainless steel, the structure of the water pump impeller and guide vane is known, and the general performance curve of the pump device is as follows figure 2 shown.
[0071] A. Blade shaft position optimization based on full operating conditions:
[0072] 1. Determination of calculation conditions for the full range of operating conditions:
[0073] According to the actual operating range of the pump, 5 types of pump heads are determined: 3.5m, 4.75m, 6m, 7.25m, 8.5m, 5 kinds of blade angles -4°, -2°, 0°, 3°, 6°, a total of 25 A calculation con...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The method for improving the angle adjustment accuracy and reliability and durability of the mechanical full adjustment mechanism of a water pump belongs to the technical field of power machinery equipment accuracy and reliability and durability. Adjustment error, reduce the stress on the separation bearing of the adjustment mechanism, and improve reliability and durability; specifically include the optimization of the position of the pump blade shaft under full operating conditions based on CFD-computational fluid dynamics, and increase the rotation of the adjustment mechanism when the space in the impeller hub allows. Measures such as the length of the arm and the selection of separate thrust roller bearings with a small inclination angle; after the comparison of the adjustment force before and after the improvement of the adjustment mechanism and the force and life of the separation bearing, the invention can reduce the blade adjustment force by an average of 60% in the full operating condition of the water pump. About 68% of the force on the release bearing is reduced on average, and the calculation life is extended by about 30 times.
Description
technical field [0001] The invention belongs to the technical field of precision and reliability and durability of power mechanical equipment, and relates to a method for improving the angle adjustment accuracy and reliability and durability of a mechanical full-adjustment mechanism of a water pump, and specifically relates to a method for different lifts and different blade angles of water pumps. Under full operating conditions, by optimizing the position of the blade shaft, increasing the length of the adjusting mechanism’s rotating arm, and applying small inclination angle thrust bearings to the adjusting mechanism, the adjustment force of the blade and the force on the bearing of the adjustment mechanism can be reduced, and the performance of the mechanical full adjustment mechanism of the water pump can be improved. Angle adjustment accuracy and reliability and durability. Background technique [0002] Large and medium-sized axial flow pumps and guide vane mixed flow pu...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17
CPCG06F30/17G06F2119/06
Inventor 仇宝云刘地吴开明陆霞
Owner YANGZHOU UNIV