Critical meshing gear pair under light gear pump unit modulus

A technology of meshing gears and gear pairs, which is applied in the field of unit modulus gear pairs for pumps, can solve problems such as incomprehension and acceptance, and achieve the effect of reducing stiffness performance

Active Publication Date: 2019-02-22
SICHUAN WUHUAN PETROCHEM EQUIP CO LTD
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Optimum design technology is still difficult for general engineering and technical personnel to understand and accept

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
  • Critical meshing gear pair under light gear pump unit modulus
  • Critical meshing gear pair under light gear pump unit modulus
  • Critical meshing gear pair under light gear pump unit modulus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] Such as figure 1 As shown, a critical meshing gear pair of a light-weight gear pump of the present invention under the unit modulus includes a pair of driving and driven involute gears with the same tooth shape parameters under the unit modulus, and the meshing position of the tooth apex is The endpoints on the meshing line are the critical points.

[0030] First, from the theoretical displacement formula of the gear pump, we get

[0031]

[0032] In the formula, q e is the theoretical displacement of the pump, V e is double the pitch cylinder volume of the gear pair; V q is the unit displacement volume of the pump; lambda is the shape factor of the gear, which is equal to the ratio of the radius of the tip circle to the pitch circle.

[0033] Known from formula (1), lambda directly determines the unit displacement volume of the pump V q ( lambda ), the weight of the pump is equivalent to lambda maximize.

[0034] Secondly, in figure 1 Among them, t...

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 relates to a critical meshing gear pair under light gear pump unit modulus. The critical meshing gear pair comprises driving and driven involute gears of a pair of same-tooth-shape parameters under the unit modulus; the meshing position of tooth peaks is a critical point on a theoretic meshing line; a traditional shape parameter and size parameter mixing parallel design method for gear pump lightening is changed to a serial design method, the serial design method is characterized in that based on the tooth number determined by sensitivity analysis of critical meshing and shape parameters, the shape parameters of the addendum coefficient and the tip clearance coefficients and the calculated corresponding shape parameters; single needed maximum modulus is determined by a modulus upper limit and the standardization thereof determined by an addendum maximum peripheral speed not causing cavitation, and actual sizes including a tooth width of the gear pair are finally determined; and the modulus is the allowed maximum value, so that the gear strength and rigidity performances are improved, the axial leakage being about 85% of total leakage of the pump is reduced, and the light design requirements of the gear pump can be efficiently met with high quality.

Description

technical field [0001] The invention relates to a gear pair for an external meshing gear pump, in particular to a pump unit modulus gear pair with a critical meshing position. Background technique: [0002] External gear pump (referred to as gear pump) is a power element for pumping working medium. Because of its simple structure and excellent performance, it is widely used. It is also used in water treatment and thermal control systems of spacecraft. A pair of master and slave gears with the same parameters are the core components of the pump, and the determination of the tooth shape parameters directly affects the performance, noise and life of the pump. Among them, the involute tooth profile is the most common application. This pair of pump gear pairs with the same parameters at home and abroad, according to different application occasions, has launched a single (multiple) goal with light weight, flow pulsation, and volumetric efficiency. Lots of (optimized) designs. Am...

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
Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/18F04C15/00
CPCF04C2/18F04C15/00F04C2240/20
Inventor 李玉龙
Owner SICHUAN WUHUAN PETROCHEM EQUIP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap