Design method of outlet-inclined impeller of large hub for single-pipe vertical type long shaft multi-stage pump
A design method and multi-stage pump technology, applied in the field of multi-stage pumps, can solve the problems of lack of hydraulic design solutions for long-axis pumps, and achieve the effects of improving anti-cavitation performance, improving efficiency, improving stability and high efficiency
Inactive Publication Date: 2018-08-10
JIANGSU UNIV
View PDF3 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0009] The existing improvements to multi-stage long-axis pumps are mostly based on their assembly structure, and there is a lack of complete hydraulic design schemes for long-axis pumps
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
[0087] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0088] The present invention uses the following formulas to determine the main geometric parameters of a large hub outlet inclined impeller for a single-pipe vertical long-axis multistage pump, including the impeller inlet equivalent diameter D 0 , impeller inlet diameter D j , blade inlet diameter D 1 , impeller hub diameter D h , blade inlet angle β 1 , impeller outlet diameter D 2 , impeller outlet width b 2 , blade outlet angle β 2 , The angle ε between the rear cover and the axis, the angle γ between the front cover and the axis, the angle θ between the impeller outlet and the axis.
[0089] This embodiment calculates the first-stage double-suction impeller of a multi-stage pump with several parameters such as the design working condition flow Q of the given pump, the design working condition head H, the design working condition spee...
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 invention belongs to the technical field of multi-stage pumps, and relates to a design method of an outlet-inclined impeller of a large hub for a single-pipe vertical type long shaft multi-stage pump. The design method of the outlet-inclined impeller of the large hub for the single-pipe vertical type long shaft multi-stage pump comprises the steps of presetting multiple parameters such as a design condition flow Q, a design condition lift H, a design condition rotating speed n and a multi-stage pump stage number I of the pump, and calculating main geometrical parameters of the outlet-inclined impeller of the large hub for the single-pipe vertical type long shaft multi-stage pump, wherein the main geometrical parameters comprise an impeller inlet equivalent diameter D0, an impeller inlet diameter Dj, a blade inlet diameter D1, an impeller hub diameter Dh, a blade inlet angle beta 1, an impeller outlet diameter D2, an impeller outlet width b2, a blade outlet angle beta 2, an includedangle epsilon between a rear cover plate and an axis, an included angle gamma between a front cover plate and an axis, and an include angle theta between an impeller outlet and an axis. By adopting the outlet-inclined impeller designed by the invention, an inner flow state of the impeller is improved to a certain degree, and the hydraulic loss is greatly reduced, so that the stability and the high efficiency in running the multi-stage pump are improved.
Description
technical field [0001] The invention belongs to the technical field of multi-stage pumps, and in particular relates to a design method for a large hub outlet inclined impeller for a single-pipe vertical long-axis multi-stage pump. Background technique [0002] Vertical long-axis multistage pump is a kind of centrifugal pump. From the point of view of centrifugal pump, it is improved on the performance of submerged pump, so that its performance is much higher than that of submerged pump, and the stability during operation stronger. The advanced and mature vertical long-axis pump developed to meet the needs of the domestic market can be used to transport liquids such as clean water, rainwater, scale water, sewage, corrosive industrial wastewater, sea water and other liquids below 55 °C; after special design, it can Transport liquid at 90°C. Widely used in water supply companies, sewage treatment plants, power plants, steel plants, mines and other industrial and mining enterp...
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 Applications(China)
IPC IPC(8): F04D29/22F04D1/06
CPCF04D29/2222F04D1/06F04D29/2216
Inventor 付强陈铭王秀礼朱荣生刘刚李梦圆张国玉
Owner JIANGSU UNIV