Product Description

Product Introduction

Blovebird horizontal screen scroll centrifuge has the advantages of large production capacity, good solid phase dehydration, low energy consumption and light weight.

 

Widely used in chemical, food, pharmaceutical and mining industries, and is suitable for the separation of solid-phase suspensions containing coarse crystals and short fibers.

 

Especially suitable for separating suspension of easy dehydration and high concentration.
 

Technical Parameter

Model	Drum diameter(mm)	DrumLength(mm)	Speed(rpm)	Factor	Feeding(m³/h)	Power(kw)
LWL200	200	176	4000	1790	0.5-1.5	3
LWL250	250	208	3500	1712	1-5	4
LWL350	350	287	3000	1762	3-15	11
LWL450	450	356	2600	1700	3-18	22
LWL530	530	405	2200	1434	6-20	30
LWL630	630	496	1850	1205	10-30	37
LWL800	800	525	1500	1008	15-40	55
LWL1000	1000	664	1000	560	20-50	90

Main Features

1. Strong pertinence to materials, the crystal size is between 0.05-10mm

2. Continuous operation, Screw unloading, Large production

3. The solid phase has low moisture content, good washing effect and high separation efficiency

4. Dedicated filter screen, material optional, filter screen thickness up to 0.5mm, longer service life

5. Stepless speed regulation of drum speed

6. Simple and reliable lubrication

7. Compact structure, easy operation and maintenance

8. Safety protection: speed detection, oil-free protection, motor overload and overheat protection, spiral zero differential protection.

 

★LWL series has hundreds of cases in the waste salt treatment industry, including sodium chloride, sodium sulfate, ammonium chloride, ammonium sulfate, ferric chloride, and ferrous chloride. In addition, we have rich experience in plant extraction (tea, ginkgo, iron powder, kudzu root, hemp leaves, etc.), magnesium sulfate, copper sulfate, sodium gluconate, sodium metabisulfite, marine snowmaking, and other industries. Welcome customers from related industries to inquire.

The improvements made by Blovebird in ammonium sulfate, ammonium chloride, ammonium thiocyanate, sodium chloride and other waste liquid salt extraction equipment:
 

1. The feeding pipe device is improved, the cloth is more uniform, and the equipment operation is more stable;
2. The lubrication system is improved, the lubrication is more adequate and reasonable, and the bearing weight is increased;

3. Improve the bearing sealing system and adopt labyrinth oil seals to prevent mother liquid from entering the lubrication system;

4. The drum spiral is treated with nitriding and wear-resisting, and the service life is longer.

5. The discharging system is improved, and a scraper device is added to prevent the silo from accumulating.
 

Working Principle

       Under full speed operation: continuous feeding, washing, dewatering, unloading and other technological operations of the suspension.

       The suspension enters the spiral cavity from the feed pipe, and enters the drum through the nozzle at the bottom of the screw head near the bottom of the cone.
       Under the action of the centrifugal force field, the liquid phase in the slurry is separated by the creen set on the rotating wall When going out, the solid particles are trapped in the drum; at the same time, the solid particles in the drum move from the small end of the drum to the big end of the drum under the action of centrifugal force and the differential speed between the

spiral and the drum.
       During the movement, the centrifugal force increases rapidly due to the increase of the rotation diameter. The solid phase changes from the high moisture content solid phase when it initially enters to the low moisture content solid phase when it is discharged from the drum, thus realizing automatic and continuous solid and liquid phase separation.

 

LWL Series Screw Screen Centrifuge has been successfully used in the following:
 

 

Customer Cases

FAQ

HOW TO FIND BLOVEBIRD CENTRIFUGE?
1. Visit exhibition in different countries
2. Send Blovebird Centrifuge an request and tell your basic inquiry
3. Blovebird Centrifuge sales manager will reply you in short time and add instant chatting tool

YOU ARE WELCOME TO OUR FACTORY AT ANY TIME.
1. If we can fullfill your request and you interested in our products, you may pay a visit to Blovebird Centrifuge site
2. The meaning of visiting supplier, because seeing is believing, Blovebird Centrifuge with own manufacture and developed& research team,

HOW TO GUARANTEE YOUR FUNDS TO BE SAFE AND DELIVERY TO BE ON TIME?
1. Through letter guarantee service, it will ensure the on time delivery and the quality of the equipment you want to buy.
2. By letter of credit, you can lock the delivery time easily.
3. After the factory visit, You can ensure the facticity of our bank account.

SEE BLOVEBIRD CENTRIFUGE HOW TO ENSURE THE QUALITY!
1. In order to ensure the accuracy of each part, we are equipped with a variety of professional processing equipment and we have accumulated professional processing methods over the past years.
2. Each component before assembly needs strictly control by inspecting personnel.
3. After all the equipment are completed, we will conduct a trial run before shipment to ensure the stable running in customers’ factory

THE AFTER-SALE SERVICE OF BLOVEBIRD CENTRIFUGE!
1. After finish the production, we will test the machine, take photos, videos and send them to customers via mail or instant tools
2. After the commissioning, we will package the equipment by standard export package for shipment.
3. According to the customer’s request, we can arrange our engineers to customers’ factory to do the installation and training.
4. Engineers, sales managers and after-sales service manager will form a after-sales team, online and off line, to follow the customers’ project.

 

 

 

 

 

 

Screw Sizes and Their Uses

Screws have different sizes and features. This article will discuss screw sizes and their uses. There are 2 main types: right-handed and left-handed screw shafts. Each screw features a point that drills into the object. Flat tipped screws, on the other hand, need a pre-drilled hole. These screw sizes are determined by the major and minor diameters. To determine which size of screw you need, measure the diameter of the hole and the screw bolt’s thread depth.

The major diameter of a screw shaft

The major diameter of a screw shaft is the distance from the outer edge of the thread on 1 side to the tip of the other. The minor diameter is the inner smooth part of the screw shaft. The major diameter of a screw is typically between 2 and 16 inches. A screw with a pointy tip has a smaller major diameter than 1 without. In addition, a screw with a larger major diameter will have a wider head and drive.
The thread of a screw is usually characterized by its pitch and angle of engagement. The pitch is the angle formed by the helix of a thread, while the crest forms the surface of the thread corresponding to the major diameter of the screw. The pitch angle is the angle between the gear axis and the pitch surface. Screws without self-locking threads have multiple starts, or helical threads.
The pitch is a crucial component of a screw’s threading system. Pitch is the distance from a given thread point to the corresponding point of the next thread on the same shaft. The pitch line is 1 element of pitch diameter. The pitch line, or lead, is a crucial dimension for the thread of a screw, as it controls the amount of thread that will advance during a single turn.

The pitch diameter of a screw shaft

When choosing the appropriate screw, it is important to know its pitch diameter and pitch line. The pitch line designates the distance between adjacent thread sides. The pitch diameter is also known as the mean area of the screw shaft. Both of these dimensions are important when choosing the correct screw. A screw with a pitch of 1/8 will have a mechanical advantage of 6.3. For more information, consult an application engineer at Roton.
The pitch diameter of a screw shaft is measured as the distance between the crest and the root of the thread. Threads that are too long or too short will not fit together in an assembly. To measure pitch, use a measuring tool with a metric scale. If the pitch is too small, it will cause the screw to loosen or get stuck. Increasing the pitch will prevent this problem. As a result, screw diameter is critical.
The pitch diameter of a screw shaft is measured from the crest of 1 thread to the corresponding point on the next thread. Measurement is made from 1 thread to another, which is then measured using the pitch. Alternatively, the pitch diameter can be approximated by averaging the major and minor diameters. In most cases, the pitch diameter of a screw shaft is equal to the difference between the two.

The thread depth of a screw shaft

Often referred to as the major diameter, the thread depth is the outermost diameter of the screw. To measure the thread depth of a screw, use a steel rule, micrometer, or caliper. In general, the first number in the thread designation indicates the major diameter of the thread. If a section of the screw is worn, the thread depth will be smaller, and vice versa. Therefore, it is good practice to measure the section of the screw that receives the least amount of use.
In screw manufacturing, the thread depth is measured from the crest of the screw to the root. The pitch diameter is halfway between the major and minor diameters. The lead diameter represents the amount of linear distance traveled in 1 revolution. As the lead increases, the load capacity decreases. This measurement is primarily used in the construction of screws. However, it should not be used for precision machines. The thread depth of a screw shaft is essential for achieving accurate screw installation.
To measure the thread depth of a screw shaft, the manufacturer must first determine how much material the thread is exposed to. If the thread is exposed to side loads, it can cause the nut to wedge. Because the nut will be side loaded, its thread flanks will contact the nut. The less clearance between the nut and the screw, the lower the clearance between the nut and the screw. However, if the thread is centralized, there is no risk of the nut wedgeing.

The lead of a screw shaft

Pitch and lead are 2 measurements of a screw’s linear distance per turn. They’re often used interchangeably, but their definitions are not the same. The difference between them lies in the axial distance between adjacent threads. For single-start screws, the pitch is equal to the lead, while the lead of a multi-start screw is greater than the pitch. This difference is often referred to as backlash.
There are 2 ways to calculate the pitch and lead of a screw. For single-start screws, the lead and pitch are equal. Multiple-start screws, on the other hand, have multiple starts. The pitch of a multiple-start screw is the same as its lead, but with 2 or more threads running the length of the screw shaft. A square-thread screw is a better choice in applications requiring high load-bearing capacity and minimal friction losses.
The PV curve defines the safe operating limits of lead screw assemblies. It describes the inverse relationship between contact surface pressure and sliding velocity. As the load increases, the lead screw assembly must slow down in order to prevent irreversible damage from frictional heat. Furthermore, a lead screw assembly with a polymer nut must reduce rpm as the load increases. The more speed, the lower the load capacity. But, the PV factor must be below the maximum allowed value of the material used to make the screw shaft.

The thread angle of a screw shaft

The angle between the axes of a thread and the helix of a thread is called the thread angle. A unified thread has a 60-degree angle in all directions. Screws can have either a tapped hole or a captive screw. The screw pitch is measured in millimeters (mm) and is usually equal to the screw major diameter. In most cases, the thread angle will be equal to 60-degrees.
Screws with different angles have various degrees of thread. Originally, this was a problem because of the inconsistency in the threading. However, Sellers’s thread was easier to manufacture and was soon adopted as a standard throughout the United States. The United States government began to adopt this thread standard in the mid-1800s, and several influential corporations in the railroad industry endorsed it. The resulting standard is called the United States Standard thread, and it became part of the ASA’s Vol. 1 publication.
There are 2 types of screw threads: coarse and fine. The latter is easier to tighten and achieves tension at lower torques. On the other hand, the coarse thread is deeper than the fine one, making it easier to apply torque to the screw. The thread angle of a screw shaft will vary from bolt to bolt, but they will both fit in the same screw. This makes it easier to select the correct screw.

The tapped hole (or nut) into which the screw fits

A screw can be re-threaded without having to replace it altogether. The process is different than that of a standard bolt, because it requires threading and tapping. The size of a screw is typically specified by its major and minor diameters, which is the inside distance between threads. The thread pitch, which is the distance between each thread, is also specified. Thread pitch is often expressed in threads per inch.
Screws and bolts have different thread pitches. A coarse thread has fewer threads per inch and a longer distance between threads. It is therefore larger in diameter and longer than the material it is screwed into. A coarse thread is often designated with an “A” or “B” letter. The latter is generally used in smaller-scale metalworking applications. The class of threading is called a “threaded hole” and is designated by a letter.
A tapped hole is often a complication. There is a wide range of variations between the sizes of threaded holes and nut threads, so the tapped hole is a critical dimension in many applications. However, even if you choose a threaded screw that meets the requisite tolerance, there may be a mismatch in the thread pitch. This can prevent the screw from freely rotating.