History and Advantages of Vane Compressors - NAILI

    History and Advantages of Vane Compressors

For more information, please visit rotary vane ac compressor.

(Article copied from Linkedin)

The vane compressor is also called the rotary vane compressor or the sliding vane compressor.

The vane compressor was invented by Charles Barnes of Canada. He applied for a patent on June 16, .

The vane compressor is one of the most widely used products in the world today. They serve all walks of life.

The vane compressor uses centrifugal motion to generate compressed air.

The vane compressor, also known as the rotary vane air compressor, uses centrifugal motion to generate compressed air instead of using the reciprocating motion of a piston pump.

A compressor consists of a cylindrical rotor eccentrically placed in the casing.

This kind of casing has an air inlet and an air outlet also called an air inlet and an air outlet. The air inlet of the case is larger than the air outlet. There is a drum in the center of the rotor.

This drum rotates eccentrically with respect to the housing. This rotor has several radial slots. Each radial slot is equipped with a blade, which is spring-loaded. These blades are made of steel or synthetic fiber materials. If the compressor is oil-lubricated, there will be a thin layer of oil between the blades and the casing.

The space between adjacent blades forms a pocket with a decreasing volume from a fixed air inlet to a fixed air outlet.

The greater the number of vanes, the smaller the pressure difference between adjacent spaces around the rotor, the less air will leak.

The high-pressure ratio requires a large number of blades (20-30).

    Advantages of vane compressor:

1) It creates a very good suction vacuum.

2) The vane compressor is suitable for continuous air supply.

3) The vane compressor can achieve high-pressure and high-power compression.

4) The vane compressor has a longer life.

5) They are very suitable for medium pressure applications.

Some applications of vane compressors are:

1) Used in agricultural operations, agricultural equipment, material fabrication, transportation, etc.

2) It is used for the operation of the paint pump in the automobile body painting workshop.

3) Used for tire inflation in tires and wheel factories.

4) For dry cleaning.

5) Used for air knife operation, cutting, and peeling.

6) It is used in welding operations and air-operated metal and woodworking tools.

We are a Rotary Vane Compressor manufacturer. If you are interested in our products, please feel free to contact us.

Rotary vane compressors, AKA sliding vane compressors, are one of the positive displacement compressors and are used in a wide range of industries. They have been around for quite a while now since their invention in the late 19th century, and maybe this is one of the reasons they are so common. These types of compressors take advantage of centrifugal force to compress air, and this has become possible by a creative yet simple design that will be discussed in the following.

Are you interested in learning more about china modular dryer manufacturers? Contact us today to secure an expert consultation!

Now, you might wonder if rotary vane compressors are the type of air compressors you need for your specific application. Well, we at Linquip are here for you to not only find the product you need in here with an ease of mind, but also make sure you are considering all the important aspects of your choice. So, find out if rotary vane compressors are the best choice for you.

Also for an overview of all air compressor types, see our post here.

Structure of Rotary Vane Compressors

As can be deduced from the name, rotary vane compressors have a rotor. The cylindrical rotor is placed eccentrically in a casing and has a drum in the center. The air enters and then exits the casing through the inlet and outlet ports. The drum takes the air the smallest space at the outlet port and takes it takes it to a bigger one at the inlet port.

There are several radial slots in the rotor with spring-loaded vanes fitted to them. The purpose of the springs is to ensure contact between the vanes and the housing at all times. As the rotor rotates, some vanes are compressed and some are extended. It is also usually the case that the inlet port is larger than the outlet port.

Working Principle

As already mentioned, the rotor is placed eccentrically in a way that the drum is closest to the housing at the outlet port and farthest from it at the inlet port. Now, each two adjacent vanes form a space enclosed by them and the corresponding sections of the drum and the housing. Therefore, the air trapped between two adjacent vanes at the inlet port undergoes a compression due to the shrinking space as the rotor moves about the its axis of rotation until it reaches to the outlet port.

In order to keep the air from escaping its space between adjacent vanes, there might be some oil-lubrication for the compressor that also plays the role of sealing. A thin layer of oil will seal the space between the vanes and the housing. Of course, oil-free designs are also available. Nonetheless, the core idea is to have some elastic mechanical component such as springs connected between the vanes and the drum that will keep pushing the vanes against the housing to ensure no or minimal air leakage between each two adjacent vanes.

It might have already crossed your mind that the pressure ratio for rotary vane compressors is dependent on the number of vanes. The more vanes a sliding vane compressor has, the higher its pressure ratio is going to be. You could expect a typical value of 5:1 for the pressure ratio of single-stage rotary vane compressors, and a value of up to 8:1 the high-pressure models. The number of vanes, therefore, varies from something like 20 to 30 according to how much pressure rise is demanded from the design. These compressors are usually used for capacities of up to 150 psig (1,034 kPag).

For a visual representation of how rotary vane compressors work, see here.

Watch Video about Rotary Vane Compressors

Applications of Rotary Vane Compressors

As one of the oldest types of gas compressors, the compressors have a wide range of applications. Their design produces less pulsations in the flow and therefore less noise. With newer design and manufacturing techniques, they work more efficiently now than their earlier ancestors, and where the pressure demand is within their range of application, they could be the best choice.

Rotary vane compressors are used in the agricultural industry to supply compressed air for applications such as operating farm equipment or planting. They can also be used for so many tasks in food and beverage industry such as product handling or air knives. The dry-cleaning industry also enjoys using rotary vane compressors to provide the compressed air they need for proper incorporation of chemicals they use during the dry cleaning.

Rotary vane compressors could be used anywhere that there are air-operated tools. All sorts of metal and wood working businesses such as automotive industry that use these compressors to supply compressed air for welding, cutting, etc. or furniture manufacturers benefit from rotary vane compressors.

Sliding vane compressors are also used in the energy sector in applications such as drilling rigs or turbine operation. They can also be used for vapor recovery, gas transfer, etc. as well as purging and cleaning equipment.

These types of compressors are also useful in pharmaceutical, medical, and dental applications. For instance, rotary vane compressors can be used to provide the compressed air used for accelerated drying in pharmaceutical industries. As an example of medical and dental applications of rotary vane compressors, they can be used for air-driven tools and devices such as breathing equipment and air-driven dental units that are used for drilling, cutting, or polishing of teeth.

Advantages and Disadvantages of Rotary Vane Compressors

The advantages of rotary vane compressors include:

• Simple design and not so many moving parts
• Versatile and efficient
• Relatively low initial costs
• Long life expectancy of as long as 100K hours
• Continuous air supply
• Easy on-site maintenance
• Very small amount of oil needed for lubrication
• Relatively compact size

The disadvantages of rotary vane compressors include:

• Some lubricant will enter the air; therefore, some air/lubricant separation is necessary
• Limited application for high pressure ratio demands
• Difficult and high-cost multi-staging
• Limited discharge pressure (up to 200 psig (1,378 kPag) for high pressure models)
• Not flexible to capacity control

Rotary Vane Compressors vs. Screw Compressors

Rotary vane compressors came around a lot earlier than their screw counterparts. They are simpler in design and have almost double the life expectancy of screw compressors. Nonetheless, screw compressors dominate rotary vane compressors when it comes to capacity, energy efficiency, and turndown ratios. Let us look at their differences in further detail:

Rotary Vane Compressors Screw Compressors Pressure ratio 8:1 20:1 Discharge pressure 200 psig (1,378 kPag) 450 (3,103 kPag) Oil Low amounts required basically for lubrication A lot of oil required for lubrication and cooling Cooling Air cooled Oil cooled Gas composition sensitivity Can handle almost any gas Not capable of handling sour gases Turndown 40 % up to 100 % 15% up to 90% (100% with slide valves) Delta P No minimum delta P At least 40 PSI delta P Maintenance On-site easy repair. low component wear. Necessity for a complete change-out after a problem or even for maintenance.

 

Read More on Linquip

For more compressor drivesinformation, please contact us. We will provide professional answers.