Whether the screw conveyor can be made dense is different

A bucket conveyor is a bucket conveyor whose hopper rotates on a pin between two chains, and can move horizontally to the discharge point and flip the hopper to discharge the material. Compared with ordinary bucket conveyors, the hopper of the rotary bucket conveyor can rotate on the pin shaft between the two chains, which makes the conveyor better maintain the stability of the material during transportation and reduce the scattering and loss of the material. At the same time, the flipping design of the hopper also makes the unloading more convenient and efficient.

Bucket conveyors are widely used in material transportation in mining, metallurgy, chemical industry, environmental protection, refractory and other industries. Xinxiang Hengyu Machinery Equipment Co., Ltd., the source manufacturer of screening and conveying equipment for 18 years, independently develops and produces: Z-type bucket elevator, square swing screen, U-shaped screw conveyor, tubular screw conveyor, fine screening...

LS type screw conveyor (hereinafter referred to as screw machine) adopts ISO01050-75 standard, and designs and manufactures the professional standard of Fu type screw conveyor. LS type screw machine spiral diameter from 100 mm to 1250 mm, a total of 12 specifications, divided into single drive and double drive two forms, single drive screw machine maximum length up to 40 meters (extra-large 30 meters) double drive screw machine using intermediate disconnect shaft structure, maximum length up to 80 meters (extra-large 60 meters). The length of the screw machine is one gear per meter, which can be selected according to the need, and the middle hanging shaft of the screw machine adopts a special structural form, which has low resistance, strong sealing, good wear resistance and long service life.

The position of the inlet and outlet is flexibly arranged, and the electric outlet is added to facilitate automatic control. LS screw machine has the characteristics of novel structure, advanced technical indicators, strong adaptability, convenient operation and maintenance

Screw machine is widely used in building materials, metallurgy, chemical industry, electric power, coal, machinery, light industry, grain and food industry, suitable for conveying powdery, granular, small block materials, such as cement, pulverized coal, grain, fertilizer, ash, sand, coke, etc.: not suitable for conveying perishable, viscous, easy to agglomerate materials, LS type screw machine working environment temperature is usually -20 40, the general of conveying materials - 20 80, LS type screw machine suitable for horizontal and small inclination layout, inclination angle not more than 15 ° is appropriate, If there are special requirements, you can negotiate with the manufacturer for special design and manufacturing.

So, your answer is yes!

Yes, it is a variable pitch spiral, but depending on the material being conveyed.

Answer]: A, C, D

See textbook p141).

Analysis] This question examines the installation of mechanical equipment. When the screw conveyor conveys blocky, dry, fibrous or sticky materials, the solid materials conveyed by the open chain have a tendency to crush.

The spiral tensioning device of the conveyor belt is a fixed tensioning device, which is simple in structure and easy to manufacture, mainly composed of tensioning screws, nuts and carriages. Its working principle is to fix the tail wheel directly on the carriage equipped with tension nut, rotate through the screw, drive the tail wheel to move back and forth, to achieve the purpose of tensioning the tape, so that the tape has enough tension to ensure that the belt and the drum do not slip.

The features of the spiral tensioning device are:

1) The tensioning force is small, and the tensioning stroke is short; The adjustment capacity of the spiral tensioning device mainly depends on the size and length of the screw diameter, because it is installed on the tail wheel frame, limited by the tail wheel support, the screw diameter and length are generally not large, so the tensioning stroke is shorter, and the tensioning force is also smaller, and it is not suitable for being installed on the long-distance belt conveyor with long tensioning force.

2) Simple structure and easy operation; When the tape needs to be tensioned, only need to rotate the screw with a wrench, the operation is simple and fast, the labor intensity of workers is small, and the efficiency is high. For belt conveyors with slight deviation, the belt can be adjusted by tightening the screw on only one side of the rotation and adjusting the parallel angle between the tail wheel and the head wheel.

3) Small installation size, make full use of space; The overall dimensions of the screw and nut are usually small, the manufacturing difficulty is small, the processing is easy, and it is installed on the tail wheel support, which makes full use of the space and saves the floor space of the equipment, so the cost of the whole machine is low.

4) Low operating cost; Because the screw has self-locking characteristics, its performance is stable and reliable, and it has good adaptability to the external environment, long service life, and can be used normally even under harsh working conditions with large dust and muddy water. Tensioning device spare parts are not expensive, maintenance and replacement time is short, and the labor intensity of maintenance workers is small, so the efficiency is high and the operating cost is low.

Therefore, it is recommended to use it within 100m. Xinxiang Parkson Machinery provides technical support.

The screw conveyor consists of a screw shaft equipped with spiral blades, a barrel and a bearing device. The spiral shaft is mounted on the bearing housing at both ends of the barrel by means of a head bearing and an end bearing, and the shaft head at one end is connected to the driving device. There are bursts and discharge ports on the barrel respectively.

The screw conveyor can convey materials in both horizontal and inclined directions, and complete operations such as mixing, mixing and cooling while conveying materials.

The seal between the screw shaft and the bearing is sealed with a double oil seal. An oil seal on the left prevents fine powder from entering the housing, and a seal on the right prevents the grease of the bearing from flowing axially into the barrel and contaminating the material. The oil seal, also known as the rotary lip seal, is smaller than the shaft diameter in the free state, that is, there is a certain amount of interference.

After the oil is encapsulated to the shaft, the pressure of the cutting edge and the contraction force of the self-tightening spring produce a certain radial holding force on the sealing shaft, cut off the leakage gap, and achieve the purpose of sealing. The higher the speed of the rotating shaft, the greater the friction of the oil seal on the shaft, the higher the temperature rise and the lower the life of the oil seal.

Abstract:Screw conveyor is a kind of machinery that uses a motor to drive the screw to rotate and move materials to achieve the purpose of conveying. It has flanged disc housing seals and inverted housing seals.

In addition, the conveying volume is an important indicator to measure the capacity of the screw conveyor, and the conveying volume is calculated by the formula: q=. Next, this article will briefly introduce what seal is used for screw conveyor and what is the formula for calculating the conveying volume of screw conveyor, let's take a look at it in the article!

1. What kind of seal is used for the screw conveyor.

At present, the screw conveyor uses the rotating force of the spiral blades to realize the material movement, that is, the conveying, in addition, it can not only be used for horizontal transportation, but also can realize inclined transportation and even vertical transportation. Then the sealing form of its sealing parts is:

1. Flange disc bearing seat seal: In this seal, the gap between the screw shaft and the side plate shaft hole is controlled within 1mm, and the seal and bearing are in the same bearing seat, and are located on the outside of the dry end plate at the same time, which can be used in conjunction with the skeleton oil seal.

2. Upside-down bearing seat seal: generally built into the barrel, one end is welded on the spindle, and the other end is welded on the disc, but the diameter of the disc is required to be smaller than the diameter of the inner cylinder. In addition, a shaft is fixed in the end plate for mounting the two-disc bearings and is built into the inverted housing.

2. What is the formula for calculating the conveying volume of the screw conveyor?

The conveying volume deficit is an important indicator to measure the capacity of the screw conveyor, and the conveying volume calculation formula is: q=

q - conveying volume (t h).

s - pitch (m).

d - spiral blade diameter (m).

n - screw shaft speed (min).

Fill factor. The filling factor depends on the friction of the material to be conveyed and its adhesion, the pitch and the inclination angle of the centerline of the screw conveyor.

1. For flowing materials with almost no wear (such as flour, grains), take =.

2. For a small number of worn and granular to small pieces of scoundrels (such as salt, sand) before selling =.

3. For hail jujube materials (such as slag, gravel, ore) with great abrasion and erosion and high loose density, take =.