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Test device of performance test of stepped diffuser of headbox

A technique of step diffusion, test device, applied in the field of paper machine

Inactive Publication Date: 2010-03-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the numerical simulation conclusions cannot be directly used in the design and improvement of the stepped diffuser, and should be verified by experiments.

Method used

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  • Test device of performance test of stepped diffuser of headbox
  • Test device of performance test of stepped diffuser of headbox
  • Test device of performance test of stepped diffuser of headbox

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Experimental program
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Embodiment Construction

[0013] Such as figure 1 As shown, the test device for the performance test of the step diffuser of the headbox includes a water storage tank 1, a first ball valve 2, a first flexible single-ball rubber joint 3, a variable diameter flange 4, a centrifugal pump 5, an electromagnetic flowmeter 6, a first Second ball valve 7, variable diameter joint 8, steady flow box 9, first pressure gauge 10, transparent step diffuser 11, transparent water tank 12, second pressure gauge 13, second flexible single-ball rubber joint 14, PIV test system 15. Water storage tank 1, first ball valve 2, first flexible single-ball rubber joint 3, centrifugal pump 5, variable diameter flange 4, electromagnetic flowmeter 6, second ball valve 7, variable diameter joint 8, steady flow box 9. The first pressure gauge 10, the transparent stepped diffuser 11, the second pressure gauge 13, and the second flexible single-sphere rubber joint 14 are connected in sequence, and the transparent stepped diffuser 11, t...

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Abstract

The invention discloses a test device of performance test of a stepped diffuser of a headbox, comprising a water storage tank, a centrifugal pump, an electromagnetic flowmeter, a steady flow box, a transparent stepped diffuser, a transparent water tank, a PIV test system and the like. The water storage tank is successively connected with a first ball valve, a first flexible single ball rubber elbow, the centrifugal pump, an adapter flange, the electromagnetic flowmeter, a second ball valve, a reducer union, the steady flow box, a first piezometer, the transparent stepped diffuser, a second piezometer and a second flexible single ball rubber elbow; the transparent stepped diffuser, the second piezometer, the second flexible single ball rubber elbow are arranged in the transparent water tank; the second flexible single ball rubber elbow is connected with the water storage tank; and the PIV test system is arranged on a corresponding part of the transparent stepped diffuser. Judgment and forecast are performed on rag rectifying performance of the stepped diffuser when flow velocity distribution and cavitation conditions at stepped parts of an axial cross section thereof are obtained.

Description

technical field [0001] The invention relates to a paper machine, in particular to a device for testing the performance of a headbox stepped diffuser. Background technique [0002] The headbox is a key part of the paper machine, and it is the hub connecting the two parts of "flow delivery" and "forming". In order to make the quantitative distribution of the paper in the transverse direction uniform and evenness good, it is required that the slurry in the headbox is evenly and stably distributed, and the fibers in the slurry cannot be flocculated. As an efficient slurry distribution and rectification element, the stepped diffuser plays a vital role in the slurry flow conditions in the complex flow field in the headbox. Therefore, it is always necessary to study the slurry distribution and rectification performance of the stepped diffuser. Hot and difficult issues. [0003] At present, domestic and foreign researches on the rectification performance of the stepped diffuser ar...

Claims

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Application Information

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IPC IPC(8): G01M10/00
Inventor 王乐勤杜红霞刘锦涛焦磊
Owner ZHEJIANG UNIV
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