A variable-pitch hollow screw micro-powder feeding device and its design method

A variable pitch, hollow technology, applied in the field of material transportation, can solve problems such as uneven feeding and poor powder feeding, achieve stable feeding, high accuracy and stability, and avoid uneven feeding

Active Publication Date: 2021-08-13
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a variable-pitch hollow screw micro-powder feeding device and its design method to solve the above-mentioned technical problems of poor powder feeding and uneven powder feeding

Method used

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  • A variable-pitch hollow screw micro-powder feeding device and its design method
  • A variable-pitch hollow screw micro-powder feeding device and its design method
  • A variable-pitch hollow screw micro-powder feeding device and its design method

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Effect test

Embodiment 1

[0035] A variable-pitch hollow screw micro-powder feeding device according to an embodiment of the present invention includes: a base 1, a first servo motor 2, a coupling 3, a silo 4, a feed port 5, a stirring screw 6, a second servo motor 7, Air inlet 8, agitator 9, vibration motor 10, variable-pitch hollow feeding screw body 11 and discharge port 12.

[0036] Wherein, the first servo motor 2 is connected with the variable-pitch hollow feeding screw body 11 for conveying materials, and drives the variable-pitch hollow feeding screw body 11 to rotate to transport the material from the outlet of the silo to the discharge port 12 of the feeding device; the second servo motor The motor 7 is connected with the stirring screw 6 to drive the stirring screw 6 and the agitator 9 to rotate, preventing the materials in the silo from bridging, overhead and hardening; the air inlet and the feeding pipeline can be connected with a pipeline according to the actual experimental conditions to ...

Embodiment 2

[0039] see figure 1 , a variable-pitch hollow screw micro-powder feeding device according to an embodiment of the present invention is composed of a first stepping motor, a second stepping motor, a coupling 3, a variable-pitch hollow feeding screw 11, a vibrating motor 10, and a feeding port 5. It is composed of silo 4, stirring screw 6, air inlet 8, agitator 9, discharge port 12 and bracket 13. The variable-pitch hollow conveying screw body 11 is connected with the first stepping motor and the coupling 3, and is used to uniformly and continuously convey the materials falling from the outlet of the silo to the discharge port. The speed of the variable-pitch hollow conveying spiral body 11 can be adjusted according to The required feeding amount is adjusted; the stirring screw 6 is connected with the second stepping motor, the thread at the bottom of the stirring screw 6 can control the material in the silo to fall into the outlet of the silo evenly, and the agitator 9 fixed on...

Embodiment 3

[0045] A design method of a variable-pitch hollow spiral micro-powder feeding device according to an embodiment of the present invention includes the following steps:

[0046] The screw feeding amount is directly related to the screw size and screw speed; among them, the screw size of the screw feeder is directly related to the feeding amount and structural size of the feeding device.

[0047] The variable-pitch hollow conveying screw pushes the conveyed material in a fixed casing and slips. Due to the gravity and the friction of the conveying pipe wall, the material does not move in translation with the screw rotation. The average speed of the material being pushed can generally be expressed according to the formula (1) calculation,

[0048] v=S n (1)

[0049] In the formula: v is the average speed of the material being pushed, m / min; S is the pitch of the variable-pitch hollow feeding screw, m; n is the speed of the variable-pitch hollow feeding screw, r / min.

[0050] The ...

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Abstract

The invention discloses a variable-pitch hollow spiral micro-powder feeding device and a design method thereof, comprising: a silo; the silo is provided with an inlet, an air inlet and an outlet; It is equipped with an inlet and an outlet; the inlet of the silo is used as the feed port of the variable-pitch hollow screw micro-powder feeding device, the outlet of the silo is connected with the inlet of the feeding chamber, and the outlet of the feeding chamber is used as a variable-pitch hollow screw micro-powder feeding device. The discharge port of the device; a stirring screw is arranged in the silo, and an agitator is fixedly installed on the stirring screw; a variable-pitch hollow feeding screw is arranged in the feeding cavity; the variable-pitch hollow feeding screw is close to the inlet of the feeding cavity The pitch is greater than that of the variable-pitch hollow feeding screw body near the outlet of the feeding cavity. The variable-pitch hollow screw micro-powder feeding device and the design method thereof of the present invention can realize accurate, stable, continuous and uniform conveying of materials, and can improve the accuracy and stability of material conveying.

Description

technical field [0001] The invention belongs to the technical field of material transportation, and in particular relates to a variable-pitch hollow screw micro-powder feeding device and a design method thereof. Background technique [0002] The current powder feeding devices mainly include mechanical powder feeding devices such as screw type, rotary scraper type and impeller type, pneumatic powder feeding devices such as fluidization type, drainage type and pneumatic cylinder type, and compound powder feeding devices. [0003] At this stage, most of the pulverized coal or biomass combustion experiments in the laboratory involve the problem of micro-powder feeding of 0.1-1g / min. The micro-powder feeding devices used to study the combustion characteristics of pulverized coal and biomass mostly have material bridging in the silo, Problems such as agglomeration and powder accumulation in the conveying structure are difficult to solve, and there are problems such as uneven and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65G65/46B65G33/24B65G33/26B65D88/68B65D88/54
CPCB65D88/54B65D88/68B65G33/24B65G33/265B65G65/46
Inventor 谭厚章于世林吕钊敏熊小鹤
Owner XI AN JIAOTONG UNIV
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