Apparatus for pneumatically feeding at least one spinning preparation machine, for example a carding machine or cleaner

A preparation machine, pneumatic feeding technology, applied in fiber processing, textile and papermaking, fiber feeding, etc., can solve problems such as impossible automatic adjustment, impossible air volume uniformity, etc.

Inactive Publication Date: 2009-03-11
TRUTZSCHLER GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage here is that, with a constant number of cards, it is not possible to carry out automatic adjustments to changes in the pressure of the shaft of the fiber material, as a result of which it is not possible to make the amount of conveyed air more uniform

Method used

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  • Apparatus for pneumatically feeding at least one spinning preparation machine, for example a carding machine or cleaner
  • Apparatus for pneumatically feeding at least one spinning preparation machine, for example a carding machine or cleaner
  • Apparatus for pneumatically feeding at least one spinning preparation machine, for example a carding machine or cleaner

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example

[0031] 1). Operating point 1

[0032] Operating point 1 of fan 4 is defined by the following parameters:

[0033] ΔP=1800(Pa)

[0034] n=1508 (rev / min)

[0035] V=2250(m 3 / h) (=ideal value)

[0036] ΔP = total pressure difference

[0037] n = fan speed

[0038]V = air volume flow

[0039] 2). Operating point 2

[0040] For example due to the loading axis 6 1 、6 2 Changes in the amount of fiber material in the charging shaft 6 1 、6 2 , and correspondingly the pressure p in the feed and distribution line 5 is reduced from 1800Pa to 1700Pa.

[0041] Therefore, operating point 2 for fan 4 becomes:

[0042] ΔP=1710(Pa)

[0043] n=1508 (rev / min)

[0044] V=3750(m 3 / h) (= actual value)

[0045] As the pressure drops, the air volume flow V increases while the fan speed remains constant.

[0046] 3). Operation point 3

[0047] The speed n of the fan is reduced (adjusted) from 1508 rpm to 1450 rpm. As a result, operating point 3 is defined by the following parameter...

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Abstract

A device for pneumatically feeding at least one spinning preparation machine by means of a lint charging shaft arranged upstream of a single spinning preparation machine and connected to a pneumatic fiber delivery line utilizing The supply fan is connected to the fiber processing machine located upstream, where the setting performs an automatic regulation for the air volume flow (air volume). In order to keep the volume flow of conveyed fiber material substantially or completely constant in the presence of different charge pressures in at least one fiber material shaft, a set of representations is varied according to the pressure difference of the fan for different charge pressures in at least one fiber material shaft The characteristic curve of the air volume flow rate is stored in a characteristic curve group element, the measurement signal of the actual pressure difference at the fan and the value related to the actual fan speed can be determined in the computer unit, which can be obtained from the characteristic curve group In determining the air volume flow, in case of deviation from the ideal value of the air volume flow, the operating point of the fan speed can be shifted to the ideal value of the air volume flow.

Description

technical field [0001] The invention relates to a device for pneumatically feeding at least one spinning preparation machine, such as a card or cleaning machine, with a lint charging shaft arranged upstream of a single spinning preparation machine and connected to a Pneumatic fiber conveying line, which is connected to the upstream fiber processing machine with a fiber material supply fan, wherein it is arranged to perform an automatic regulation for the air volume flow (air volume). Background technique [0002] In practice, radial fans are used to feed material to the charging shaft via a pneumatic conveying line, and the air-related technical performance of these fans is described using a set of characteristic curves. These characteristic curves describe the air volume flow as a function of the total pressure difference generated at the fan. Accordingly, various curves are generated for different fan speeds. If the resulting overall pressure difference then changes due ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): D01G23/08D01G23/06
CPCD01G23/08
Inventor罗伯特·特本
OwnerTRUTZSCHLER GMBH & CO KG