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

Method for determing cam outline shape of nonimpact constant flow double-plunger pump

A cam profile, double plunger pump technology, applied in the mechanical field, can solve the problems of discontinuous piston acceleration and unfavorable high-speed operation of the plunger pump.

Inactive Publication Date: 2006-11-29
SHANGHAI JIAO TONG UNIV
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the literature search, Yan Guojun and others published the article "Study on the Movement Law of Reciprocating Pump Valve" in "China Mechanical Engineering" 2004 (9): 1617-1618. This article gives a constant flow plunger pump cam design , to achieve flow without pulsation, but with this cam, the acceleration of the piston is discontinuous, and there will be a flexible impact between the piston and the cam, which is especially unfavorable for the high-speed operation of the plunger pump
At present, there is no report on the continuous acceleration of the cross-flow plunger pump driving the cam.

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
  • Method for determing cam outline shape of nonimpact constant flow double-plunger pump
  • Method for determing cam outline shape of nonimpact constant flow double-plunger pump
  • Method for determing cam outline shape of nonimpact constant flow double-plunger pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] Embodiments are provided below in conjunction with the method of the present invention:

[0040] For a hydraulically driven cam, select h according to the flow rate and cam size requirements 1 =20,C 1 =50, when the speed change transition parameter is a=π / 6, the cam profile shape is obtained by applying the 5-stage cam profile expansion function provided by the present invention. Its plunger speed is as figure 1 As shown, the cam shape is as figure 2 As shown, when the cam speed is 1500r / min, the plunger area is 100πmm 2 , the plunger pump can output a constant flow of 59.2 liters / min. The plunger pump has no pulsation in flow rate and continuous plunger acceleration, which can realize stable high-speed operation.

[0041] In practical application, the plunger pump has the following points:

[0042] 1) It is beneficial to improve the operating efficiency of the plunger pump. Because the acceleration of the plunger is continuous, there is an example of high-speed...

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 a method to determine the non-impact constant flow double plunger pump cam outline shape that separates the cam into five sections: plunger accelerating section, stable output section, plunger deceleration section, plunger backhaul acceleration section, plunger backhaul deceleration section. It adopts Hermite interpolating function to determine plunger speed curve. After taking integration, using the continuing condition between the sections, determining the integration constant, the five sections resolution expression would be gained. Giving the parameter in the function according to actual situation, the non-impact constant flow double plunger pump cam outline shape would be gained. The invention ensures the high speed and stable running of the plunger and is benefit to decrease the impact from the liquid to pipeline.

Description

technical field [0001] The invention relates to a method in the field of mechanical technology, in particular to a method for determining the cam profile shape of a non-impact constant-flow double-piston pump. Background technique [0002] Reciprocating plunger pumps can provide high pressure, and are mainly used in small flow, high pressure occasions, such as oil field exploitation, hydraulic drive and control and many other fields. However, many occasions often require stable flow or require as little flow pulsation as possible. In order to make the flow without pulsation, in some occasions people adjust the flow by changing the speed of the motor driving the pump, which increases the requirements for the performance of the motor, and a corresponding control system must be added, and it is difficult to achieve high-precision and stable flow in practice; Some technicians have designed new mechanisms (such as variable eccentric mechanism, inclined plate shaft structure, etc...

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): F04B9/04
Inventor 田中旭崔毅
Owner SHANGHAI JIAO TONG UNIV
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