Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Impeller suitable for supercritical carbon dioxide centripetal turbine with grade being 5-6 MW and modeling method of impeller blades

A technology of carbon dioxide and impeller blades, which is applied in the direction of blade support components, engine components, machines/engines, etc., can solve the problems of impeller blades with uneven surface, single type of impeller, and short service life, and achieve small aerodynamic loss and aerodynamic The effect of high efficiency and broad market prospects

Pending Publication Date: 2019-03-08
HARBIN ELECTRIC CO LTD
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the supercritical carbon dioxide centrifugal turbine designed by domestic research and development institutions has a low power level, generally not exceeding 2MW; the impeller is a key component that affects the output power and efficiency of the supercritical carbon dioxide The surface is not smooth, the efficiency is low, and the service life is short

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Impeller suitable for supercritical carbon dioxide centripetal turbine with grade being 5-6 MW and modeling method of impeller blades
  • Impeller suitable for supercritical carbon dioxide centripetal turbine with grade being 5-6 MW and modeling method of impeller blades
  • Impeller suitable for supercritical carbon dioxide centripetal turbine with grade being 5-6 MW and modeling method of impeller blades

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0064] to combine figure 1 and Figure 4 To describe this embodiment, the impeller blade of this embodiment is formed by sweeping five blade-shaped curved surfaces a, b, c, d, and e along the radial direction, and the blade-shaped lines of each section are spatial curves. It is characterized in that the impeller blades determine the profile parameters of the five cross-sectional blade shapes and their changing rules from the side close to the wheel disc to the side of the wheel cover: the meridian surface profile and the Z-θ flow surface profile of the mid-arc are defined, and the blade thickness is along the Axial distribution law. Express the profile parameters and their changing rules in the form of cylindrical coordinates.

specific Embodiment approach 2

[0065] to combine figure 1 and figure 2 To illustrate this embodiment, the number of blades of the impeller is selected to be 15, considering factors such as blade strength, working fluid flow uniformity, and friction loss. Taking the Z axis as the rotation axis, 15 blades are evenly distributed in the entire circumference, and the rotation angle of two adjacent blades is 24°. Form an integral body with the wheel WD by casting or welding.

specific Embodiment approach 3

[0066] to combine Figure 5 To illustrate this embodiment, the present invention adopts a parametric modeling method to establish the section profile of the blade. Since the profile of the blade is a spatial curve, it is easier to express and model in the form of a cylindrical coordinate system. The position of point M in the Cartesian coordinate system is expressed as (x, y, z), and in the cylindrical coordinate system, it can still be expressed by an ordered array (R, θ, Z). The conversion relationship of the coordinates of the same position in the cylindrical coordinate system and the rectangular coordinate system is:

[0067] x=Rsin(θ)

[0068] y=Rcos(θ)

[0069] z=Z

[0070] In the formula: R is the distance between the origin O and the projection M' of point M on the plane XOY, that is, the vertical distance between point M and the Z axis; θ is viewed from the positive direction of the Z axis, and rotates counterclockwise from the Y axis The angle turned to OM'; Z is...

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

No PUM Login to View More

Abstract

The invention provides an impeller suitable for a supercritical carbon dioxide centripetal turbine with the grade being 5-6 MW and a modeling method of impeller blades, and belongs to the technical field of turbine impeller development research and manufacturing. The impeller comprises an impeller disc, blades are arranged on the impeller disc in a counterclockwise mode, and each blade comprises ablade root part, a blade arc-shaped part and a blade top part; the included angles between molded lines and the axial directions of an impeller blade inlet area and an impeller blade outlet area in ameridional plane are an inlet dip angle alpha1 and an outlet dip angle alpha2, the alpha1 is 90 degrees, and the alpha2 is 0 degree; the included angle between the impeller blade inlet area and an impeller disc air inlet side circumference A in the tangential direction is an inlet blade angle beta1, and the beta1 is 90 degrees; and the included angle between the impeller blade outlet area and animpeller disc air outlet side circumference B in the tangential direction is an outlet blade angle beta2, and the outlet blade angle beta2 from the impeller disc side to the impeller cover side is 68degrees to 22.9 degrees. According to the impeller suitable for the supercritical carbon dioxide centripetal turbine with the grade being 5-6 MW, smoothness of the slope and the curvature of the pressure surface and the suction surface of the impeller blades is achieved, the aerodynamic efficiency is high, the strength meets the check standard, and the impeller can operate safely and efficiently under variable working conditions.

Description

technical field [0001] The invention relates to an impeller of a centripetal turbine and a molding method of the impeller, belonging to the technical field of R&D and manufacture of turbine impellers. Background technique [0002] Supercritical carbon dioxide Brayton cycle power generation technology has good development potential, and has broad application prospects in nuclear power generation, solar power generation, industrial waste heat power generation and other fields. The supercritical carbon dioxide centripetal turbine is the core component that affects the supercritical carbon dioxide Brayton cycle unit. It is a new type of power device that is being researched and developed at home and abroad. With its unique physical property change characteristics, it is very difficult to design a centripetal turbine using supercritical carbon dioxide as a working fluid. At present, the supercritical carbon dioxide centrifugal turbine designed by domestic research and developmen...

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
no application Login to View More
IPC IPC(8): F01D5/04F01D5/14
CPCF01D5/04F01D5/141
Inventor 李翔宇张春梅梁培培姜东坡赵俊明冯永志李佳佳刘海旭王二丹孙中伟
Owner HARBIN ELECTRIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com