How to distinguish the advantages of roots blower and high pressure blower

It is better to use high-pressure fans for small industrial equipment, and the cost is low to maintain. Large-scale equipment with Roots

Vortex fans and roots fans are both called high-pressure fans, both of which are fans with high working pressure, and the high-pressure fans you are talking about should be vortex fans. The type of fan used for water treatment explosion should be based on the working conditions and scale, small-scale, such as a few square meters to use a vortex fan, and large-scale roots fan is recommended.

To put it simply, the vortex fan relies on centrifugal force to send the gas out, and the roots blower is to forcibly transport the gas, that is, the compressed gas is transported. Taking sewage treatment as an example, the vortex fan is suitable for small pools to supply oxygen, which is economical and cost-effective; Roots blower is used for large-scale sewage treatment, and the air pressure is relatively large. When choosing, according to the pressure and gas volume you use, the roots blower with large wind pressure and large air volume is more suitable.

However, if the wind pressure is within 20kpa and the gas volume is large, you can choose a ring fan, which is more reasonable. In terms of equipment selection, it is recommended to use Roots blower or Jingong, and whirlpool fan can choose Geling or Senzi, which are more cost-effective and durable.

The working principle of two types of fans is attached:

1. The turbine high-pressure fan, also known as the vortex air pump, is working on the following principle: when the impeller rotates, due to the action of centrifugal force, the wind vane promotes the gas to move forward and outward, thus forming a series of spiral movements. The air between the impeller blades rotates in a spiral and squeezes the gas from outside the pump body into the side grooves (drawn in from the suction port), and when it enters the side channel, the gas is compressed, and then returns to the impeller blades to accelerate again.

As the air passes through the impeller and side grooves along a spiral track, each impeller blade increases the degree of compression and acceleration, and as the rotation progresses, the kinetic energy of the gas increases, causing the pressure of the gas to pass along the side channel to increase further. When the air reaches the connection point between the side trough and the discharge flange (the side channel narrows at the outlet), the gas is extruded out of the vane and discharged from the pump body through the outlet muffler.

Schematic diagram of a vortex air pump.

2. The roots fan is a positive displacement fan, the air volume conveyed is proportional to the number of revolutions, and the three-blade impeller is suction and exhaust three times by two impellers for each rotation, compared with the two-blade type, the gas pulsation becomes less, the load change is small, the mechanical strength is high, the noise is low, and the vibration is small. Two three-bladed impellers are arranged on the shafts of two horizontal rows, and a small gap is always maintained between the wheel and the inner hole surface of the oval chassis and each impeller, and because the impellers rotate at a uniform speed in the opposite direction of each other, a certain amount of gas surrounded by the box and the impeller is transported from the side of inhalation to the side of discharge. Each impeller is always kept in the correct phase by the synchronous gear, and there will be no contact with each other, so it can be high-speed, does not require internal lubrication, and has a simple structure, stable operation, stable performance, and is suitable for a variety of purposes, and has been used in a wide range of fields.

There is a big difference between the vortex fan and the roots blower, and the structural form, working principle and working characteristics are different.

Schematic diagram of roots blower.

The maximum pressure of the domestic roots blower can reach 1 kg, and the normal is 0 8 kg.

Imported roots blower, a kilogram, Japanese production of 30kw medium price at about 17,000 yuan, and the main difference between the working principle of the air compressor, the fan rotates, the piston of the compressor, the roots blower is more efficient than the compressor, the air volume is large, and it is easy to maintain.

But unlike compressor pressure, low back pressure roots blowers are often used to replace compressors, but this requires or a high-pressure compressor.

The maximum pressure of the domestic roots blower can reach 1 kg, generally only kilograms, the imported small Japanese is powerful, I have seen a can reach the kilogram, produced in Japan! The middle price of 30kw is about 17,000 yuan, the difference between him and the air compressor is mainly in the working principle, the fan is rotating, the compressor is the piston, the roots fan is more efficient than the compressor, the air volume is large, and the maintenance is convenient, but the pressure is not as good as the compressor, and the roots fan is often used to replace the compressor in the place of low pressure, but the compressor is still used in the case of high pressure.

Hello, the maximum pressure of the high-pressure roots blower is 98kpa

What we generally call fans include axial fans, centrifugal fans, etc. Their principle is similar to that of electric fans, which are driven by the rotation of several blades, and these fans are characterized by large air volume, unstable air volume, low wind pressure, and air volume is greatly affected by wind pressure.

The roots blower is composed of two alternating three-bladed rotors that press the air out of the fan chamber, similar to the principle of an inflator cylinder. This kind of fan is characterized by relatively stable air volume, which is controlled by the rotation speed. The pressure is high, up to 90 kPa.

Domestic roots blower.

The maximum pressure can reach 1 kg, and the normal is 0 8 kg.

Imported roots blower.

A kilogram, Japan produces 30kw at a medium price of about 17,000 yuan, and an air compressor.

The main difference in the working principle is that the fan rotates, the piston of the compressor, and the roots blower is more efficient than the compressor, with a large air volume and easy maintenance.

But not as high as the pressure of the compressor, low back pressure.

Roots blowers are often used to replace compressors, but this requires or a high-pressure compressor.

The outlet pressure of the roots fan is lower than 40000Pa for the low-pressure fan, higher than 40000pa and lower than 60000pa is the medium pressure roots fan, and the pressure higher than 60000pa is the high-pressure roots fan.

Roots blowers with different pressures are used for different working conditions.

When the time comes, consult the manufacturer's number 136, followed by 7636, and the end of 3376.

1. The blower shall comply with the provisions of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures.

2. The design, manufacture and general technical performance of the blower shall conform to the provisions of JB T.

3. The blower should be used normally under the condition that the inlet air temperature is not higher than 40, the content of solid particles in the gas is not more than 100mg m 3, and the maximum size of particles is not more than half of the minimum working clearance of the relative moving parts in the cylinder of the blower.

4. Under the specified working conditions, the cumulative trouble-free operation time of the blower should not be less than 6000h.

High pressure is used in applications where the wind is strong.

There are fans with pressure up to 1 kg, and some customers will choose high-pressure fans, in addition to looking at the speed, air volume, is it also necessary to look at the boost, shaft power or something? How to choose?

Wind pressure and air volume are the most important parameters of the fan, if the number of revolutions is fast, the corresponding air volume will become larger, the key to the selection of the fan depends on where you use it, and the diameter of the outlet pipeline also needs to be considered.

The air compressor is used to compress the air, as the air source of the pneumatic equipment, which can obtain higher air pressure. It is commonly used to drive cylinders and pneumatic tools, such as piston air compressors and screw air compressors.

Roots blowers are constant-torque high-pressure blowers, which use a pair of intermeshing gears for air intake and discharge, and their discharge pressure is much lower than that of air compressors, which is not enough to drive cylinders and pneumatic tools. It is commonly used in the aeration tank of water treatment plant to inject high-pressure air into the pool, coal mine dust removal gas discharge, fish pond oxygen supply, smelting blast furnace and other occasions that require high air pressure.

The blower generally refers to the commonly used centrifugal fan, which belongs to the square torque load. Compared with the above two types of equipment, its exhaust pressure is the lowest, but the same power has the largest exhaust air volume, which is used for ventilation and heat exchange, boiler blowers, induced draft fans, heat exchange in tunnel furnaces, building exhaust, and is also used in stone powder mills, chemical plants, dye mills, flour mills, and flour mills, which are widely used.

Since we are a manufacturer of roots blowers, we can only tell you some about this, roots blowers are driven by a pair of synchronous gears, so that a pair of rotors with high machining accuracy rotate at the opposite constant velocity, and the basic volume gas in the closed cavity formed by the rotor and the shell is discharged from the air inlet to the exhaust port to achieve the purpose of air blowing (pressurization).

Commonly used in: sewage treatment and aeration, dust pneumatic transportation, water plant breeding oxygen supply, chemical fertilizer factory, textile printing and dyeing factory, cement, paper mill, steel casting and other industries.

Hope it helps.

Roots blower is a positive displacement rotary blower, which uses two leaf-shaped rotors to compress and transport gas by relative motion in the cylinder. This blower has a simple structure and is easy to manufacture, suitable for gas transfer and pressurization in low-pressure occasions, and can also be used as a vacuum pump.

Under the design conditions of high-pressure blower, the fan with an air pressure of 30kpa 200kpa or a compression ratio of e= belongs to the category of high-pressure blower. High-pressure blowers, also known as high-pressure fans, are different from general centrifugal high-pressure blowers.

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Roots blowers and high-pressure blowers are two different descriptions.

Roots blowers are classified from the structure of the fan;

High-pressure blowers are classified from the pressure rise of the fan.

Can't be compared. As between hexagon bolts and high-strength bolts, there is no possibility of comparison between three-phase motors and high-power motors.