毕业设计---振动筛外文翻译

毕业设计---振动筛外文翻译Vibrating screens are designed to save space and weight while operating on minimal power。

This is achieved by using a screening surface that XXX。

gyrating。

or pulsating movementsof small amplitude。

XXX 3,000/XXX。

it is XXX of the n。

The centrifugal force factor。

which is a n of frequency of n (speed)and amplitude (throw)。

XXX。

XXX inclined screens。

Generally。

the larger the opening。

the greater the amplitude XXX.Page 2Screening Vibrating screensn and Maintenance--It pays to follow the XXX errors is to mount the screen XXX.Instead。

the screen should be XXX XXXof throw。

The screen should be XXX。

If the screen is to be used for wet screening。

it XXX.XXX。

it is XXX can cause difficult-to-correct problems。

while a screen that is not XXX may fail to perform up to XXX。

Instead。

the screen should be XXX XXX of throw。

It is alsocrucial to level the screen and check the XXX。

If the screen is tobe used for wet screening。

it XXX.Page 3Screening Vibrating screensScreening Surface--The screening surface is the heart of the vibrating screen。

It should bechosen with care and n paid to the characteristics of the material to be screened.Screening surfacescan be woven wire。

perforated plate。

polyurethane。

rubber。

or XXX wire is the most common and is available in many different types of XXX is used for heavy-XXX such as the size and shape of the material to be screened,the amount of wear the screening surface will be subjected to。

and the desired screeningefficiency.The screening surface is the most important component of the vibrating screen。

and it should be chosen with care。

taking into account the characteristics of the material to be screened。

Screening surfaces can be made of woven wire。

perforated plate。

polyurethane。

rubber。

XXX wire is the most common and is available in many different types of wire with different diametersand XXX is used for heavy-duty screening ns。

XXX such as the size and shape of the material to be screened。

the amount of wear the screening surface will be subjected to。

and the desired screening efficiency.If the throw is too small。

it can cause XXX。

increasing the XXX to pass over the screen per unit of time。

XXX.XXX amount of fine material passing over the screen with the oversize。

XXX.If an existing screen is to be used for a different n than it was originally intended for。

it is important to check with the supplier to see if any ns to the operating characteristics are needed and if the screen is XXX.The supplier can provide the operator with the correct vibrating screen if they are given the necessary n。

This includes the maximum tons per hour that need to be screened。

taking into account any XXX。

a complete size analysis or sieve analysis of the material。

or an estimated analysis if available。

should be provided。

The type of material and its weight per cubic foot in abroken state should also be given。

The operator should specify the desired ns on each deck。

as well as the surface moisture carried by the material if it is to be screened dry or the amount of water with feed if it is wet。

Finally。

any special operating requirements or ns。

such as temperature。

abrasiveness。

corrosiveness。

or other physical characteristics of the feed。

as well as efficiency or product requirements。

XXX.In summary。

to obtain the correct vibrating screen。

the operator must provide the supplier with the necessary n。

including maximum tons per hour。

size analysis of the material。

type of material and weight per cubic foot。

desired ns。

XXX moisture。

and any special operating XXX is made to meet the operator's needs.Vibrating XXX。

selecting the appropriate screen size and capacity can be XXX or XXX。

There are two main types of vibrating screens: mechanically-vibrated and electrically-vibrated。

The former can be further divided into classes based on the method of n n。

such as byeccentrics。

unbalanced weight。

cams。

or XXX。

vibrating screens XXX。

Standard sizes for vibrating screens range from 12 inches to10 feet in width and from 2.5 feet to 28 feet in length。

It is common practice to have the length of the screen be 2.5 times the width for dry screening。

For wet screening。

XXXXXX at a slope of 12 to 18 degrees and have openings aslarge as 11 square inches。

The eccentric throw for openings from5 to 11 inches is typically 1/2 inch。

while openings from 3 to 5 inches require about 3/8 inch。

and smaller openings require 1/4 inch。

The screening surface can consist of a heavy cast deck。

perforated XXX the holes。