The difference between roots blower and vortex blower

The working principle of the roots fan is that the roots fan is a positive displacement fan, the air volume conveyed is proportional to the number of revolutions, and the three-lobe impeller is suction and exhaust three times by two impellers every rotation, compared with the two-blade type, the gas pulsation is 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.

The working principle of the vortex fan is: when the impeller rotates, due to the action of centrifugal force, the wind vane prompts 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.

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

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 oxygen supply in a miniature pool, which is economical and cost-effective; The roots blower is suitable for medium and large 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 air volume is small, you can choose a vortex fan, which is more reasonable.

First of all, the working principle is different, the pressure of the vortex fan is 5kpa 100kpa, the gas volume is 50 cubic meters and 2000 cubic meters, the volume is small, the noise is low, and it is maintenance-free.

1. The flow rate is different.

Because the screw blower has the characteristics of internal compression, the pressure of the air is established in the process of suction from the inlet to the outlet, and its leakage is stable and much smaller than that of the roots blower, and it can almost be considered that the flow rate of the screw blower is proportional to its speed, while the roots blower is approximately proportional to the speed. Therefore, the indicated flow rate of the screw blower product is the real flow rate of the outlet.

2. The characteristics are different.

The roots blower has no internal compression characteristics and has the characteristics of forced gas transmission; The screw blower has the characteristics of simple structure, continuous and uniform exhaust.

3. The principle is different.

The screw blower relies on the rotary movement of the rotor in the casing to expand and shrink the working volume alternately, so as to suck the gas and increase the gas pressure; The principle of roots blower is a rotary compressor that uses two vane-shaped rotors to compress and transport gas in relative motion in the cylinder.

Encyclopedia-Roots blower.

Encyclopedia - Rotary blower.

Roots blower and screw blower are both common positive pressure fans, and the differences between the two are as follows:

1.The structural design is different: the impeller of the roots blower is mainly composed of two impellers that mesh with each other, and the impellers are equipped with several pressure converter cavities, and the air is processed through the impellers. The screw fan is mainly composed of a screw rotor and a stator.

2.Different accuracy requirements: Roots blowers require relatively high accuracy to keep the gas stable at high pressures, while screw blowers are suitable for a wider range and high pressure conditions.

3.The rated operating pressure is different: the screw fan is suitable for high-pressure working conditions, the pressure is greater than that of the roots blower, and it often operates under the excess pressure, and the roots blower operates in the ordinary pressure range, which does not exceed under normal circumstances.

In short, roots fans and screw fans have their own characteristics and advantages, and the use scenarios are different, so enterprises should choose products that suit their own needs.

Summary. Hello, with negative pressure roots blower and whirlpool blower, whirlpool blower will be a little better, their difference; The quality is different, the vortex fan belongs to the turbine fan, while the roots fan belongs to the positive displacement fan. 2. The shape is different, the shape of the vortex air pump is relatively compact, the air inlet and outlet are in the low part of the fan, the volume is small, the aluminum alloy material is used, the weight is light, and the strength is high; The roots blower uses a pulley to drive the pump chamber to work, and the volume is relatively large, while the production material is generally cast iron, and the weight is heavier.

3. The parameters are different, under the same power, the initial flow rate of the vortex air pump and the roots blower is not much different, and the pressure is slightly lower, and the flow rate and pressure of the roots blower are slightly higher because the pump cavity is larger.

Which is better, negative pressure roots blower or whirlpool blower.

Hello, with negative pressure roots blower and whirlpool blower, whirlpool blower will be a little better, their difference; The quality is different, the vortex fan belongs to the turbine fan, while the roots fan belongs to the positive displacement fan. 2. The shape is different, the shape of the vortex air pump is relatively compact, the air inlet and outlet are in the low part of the fan, the volume is small, the aluminum alloy material is used, the weight is light, and the strength is high; The roots blower uses a pulley to drive the pump chamber to work, and the volume is relatively large, while the production material is generally cast iron, and the weight is heavier. 3. The parameters are different, under the same power, the initial flow rate of the vortex air pump and the roots blower is not much different, and the pressure is slightly lower, and the flow rate and pressure of the roots blower are slightly higher because the pump cavity is larger.

The vortex fan uses centrifugal force to send the gas out, and the roots fan is forced to 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 general wind pressure is large, and the roots fan with large air volume is more suitable, but if the wind pressure is within 20kpal and the air volume is large, it is more suitable to choose a vortex fan.

It is said that in 1854, the American Roth brothers invented this kind of fan in the process of designing the hydro wheeler, which had a great influence at that time, and this reed disturbance also opened up a new way for the era of the fan. So how does a roots blower work? How is it different from other wind turbines?

Schematic diagram of the working principle of the three-lobe roots blower.

A roots blower is a positive displacement blower that passes through a pair of rotors'Meshing'**There is a gap between the subs, and they do not touch each other) to separate the air intake, and the rotor is driven by a pair of synchronous gears to move in the opposite direction, and the inhaled gas is pushed from the suction port to the exhaust port without internal compression. When the gas arrives at the exhaust port, it is pressurized by the return of high-pressure gas on the exhaust side, and the gas is transported.

Schematic diagram of roots blower working original branches.

Kiss! Hello, happy to answer your <>

Pro, the difference between ordinary blowers and roots blowers The answer is as follows: process differences:

The main engine of the roots blower is a solid casting, which is more durable and has a longer service life than the ordinary fan welded by iron plate; Pressure difference: Roots blowers can generally reach a water depth pressure of 2-6 meters, so it is relatively easy to aergate underwater; The pressure of ordinary fans is generally within 1 meter of water depth, but the air volume is larger than that of Roots, because its planning characteristics are mainly ventilation-based, not for high-pressure conditions. Maintenance Issues:

Roots blower for the oil tank smooth, generally change the oil once a few months is good, hope mine can help you <>

Do you have any other questions?

The principle is that two vane-shaped rotors are used to compress and transport gas in relative motion in the cylinder. This kind of blower has a simple structure and is easy to manufacture, and is widely used in aquaculture aeration, sewage treatment and aeration, cement transportation, and is more suitable for gas transmission and pressurization systems in low-pressure occasions, and can also be used as vacuum pumps.

The roots blower is composed of five parts: casing, wall panel, impeller, oil tank and muffler.

Chassis: mainly plays the role of support (wall panel, impeller, muffler) and fixation.

Wall panel: It is mainly used to connect the casing and the impeller, and support the rotation of the impeller, as well as to play the effect of end face sealing.

Impeller: It is the rotating part of the roots blower, which is divided into two lobes and three lobes, but due to the advantages of the three-lobe and the two-lobe gas outlet pulsation, less noise, and more stable operation, it has gradually replaced the two-lobe roots blower.

Oil tank: It is mainly used to store lubricating oil used to lubricate gears and bearings.

Muffler: It is used to reduce the noise caused by the air flow pulsation when the roots blower enters and exits.

Features:

Due to the three-bladed rotor structure and the reasonable structure of the air inlet and outlet in the shell, the fan has low vibration and low noise. The impeller and shaft are integral and the impeller is wear-free, so the performance of the fan is long-lasting and can be operated continuously for a long time.

The fan has a large volume utilization rate, high volume efficiency, compact structure, and flexible installation mode. The models are complete to meet the needs of different users for different purposes.