ISO 7119:1981

Name: ISO 7119:1981 — Continuous mechanical handling equipment for loose bulk materials — Screw conveyors — Design rules for drive power
SKU: ISO 7119:1981
Price: 7200 RUB
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Continuous mechanical handling equipment for loose bulk materials — Screw conveyors — Design rules for drive power

Название (английский):

ISO 7119:1981

Continuous mechanical handling equipment for loose bulk materials — Screw conveyors — Design rules for drive power

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 1 октября 1981 г.
Издание:: ISO IS 7119 edition 1 version 1
ICS:: 53.040.10

Тип поставки:

Full version7 200 ₽Read online 24h1 200 ₽Read online 72h1 800 ₽

Язык документа:

ruen

Срок поставки:1 раб. дн. (перевод)

Цена:7 200 ₽

Описание (английский):

Establishes a method for the calculation of drive power of screw conveyors. Applies only to a screw conveyor used in a horizontal or inclined position for a regular, controlled and continuous supply of the bulk materials, excluding the special screws for the following uses: extracting, calibrating, mixing, moistening, inclined (above 20 ) and vertical screws.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 7119:1981 defines a practical, standardized method for calculating the drive power of screw conveyors used in continuous handling of loose bulk materials. It applies to screw conveyors operating in a horizontal or inclined position (up to ~20°) with a regular, controlled and continuous feed. The standard excludes special-purpose screws such as extracting, calibrating, mixing, moistening, steeply inclined (>20°) and vertical screws. ISO 7119 is intended for designers, OEMs and engineers who need reliable power calculation and conveyor sizing guidance for bulk-material handling systems.

Key topics and requirements

Scope and applicability: horizontal and moderately inclined screw conveyors for continuous flow of bulk materials; exclusions listed above.

Power component model: total shaft power is the sum of three terms:

PH – power required to progress (convey) the material,
PN – power to run the screw at no-load,
Pst – power due to inclination (lifting or lowering material).
Total power: P = PH + PN + Pst

Capacity and flow: the standard gives a method to calculate volumetric and mass flow based on screw geometry (diameter, pitch), rotational speed and a trough-filling coefficient (p) that reflects the degree of filling.

Empirical parameters: introduces the progress resistance coefficient (A) and provides guidance on typical ranges (A generally in the order of 2–4) and how material properties affect A and filling coefficient p.

Typical filling-coefficient guidance: examples for common operating cases (e.g., p ≈ 0.45 for free-flowing, non-abrasive materials; p ≈ 0.3 for typical bulk materials; p ≈ 0.15 for heavy, very abrasive materials).

Practical formulae and variables: symbols and units are defined (screw diameter, pitch, length, speed, bulk density, mass flow, lifting height, gravity, etc.).

Informative annex: example values for bulk density and progress resistance coefficients for a range of materials to support selections.

Applications and users

Bulk-material handling design in industries such as mining, aggregates, cement, food processing, agriculture, coal and chemicals.

Mechanical engineers, conveyor designers, plant layout engineers, procurement/specification teams, and maintenance planners who need to:

size drives and gearboxes,
select motor ratings,
verify conveyor performance under expected loading and inclination,
estimate energy consumption for material transport.

Related standards

ISO 2148 (nomenclature for continuous mechanical handling equipment) is referenced for terminology.

ISO 7119 was developed by ISO/TC 101 and is based on FEM (European Mechanical Handling Confederation) Section II work.

Keywords: ISO 7119, screw conveyors, drive power calculation, continuous mechanical handling equipment, bulk materials, conveyor design, progress resistance coefficient, trough filling coefficient.

ISO 7119:1981

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

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