What are the characteristics of roots blower bearings?

The main and slave shafts of the roots blower are the left end rolling bearings as axial positioning support points. Since the inner ring of the bearing is locked on the shaft and the outer ring is mounted on the housing in the bore of the front wall plate, the screws on the two housings can be moved axially from the left end bearing by adjusting the octagonal head end fastening. This position is used to adjust the gap between the impeller and the front and rear wall plates.

When the blower is running, due to the high outlet pressure and high outlet temperature, the spindle and driven shaft and impeller can be freely expanded and contracted axially along the right end of the single row radial short cylindrical roller bearing, ensuring the main shaft and the secondary shaft. After expansion and elongation, the shaft does not bend and deform. The bearings used in roots blowers are stronger than those in other industries in terms of strength, wear resistance and temperature resistance, so that they can work for a long time in a complex and difficult maintenance environment.

For small roots blowers, double rows of centripetal spherical bearings are used at the left end of the main and slave shafts, and double rows of radial spherical roller bearings are used at the right end of the large and medium-sized roots blowers, and single row of radial short cylindrical roller bearings are used at the gear end.

The left end rolling bearing, the inner ring is locked with a round nut, and the main and slave shafts of the roots blower are axilly positioned with the left end rolling bearing as the support point.

Because the inner ring of the bearing is confined on the shaft, and the outer ring is installed on the bearing seat in the hole of the front wall plate, therefore, adjust the eight square head cylindrical end fastening screws on the two bearing seats, the axial position of the left end bearing can be moved, and the gap between the impeller and the front and rear wall plates can be adjusted.

When the roots blower is running, due to the high outlet pressure and high outlet temperature, when the main and slave shafts and impellers are heated and expanded, they can be axially freely expanded along the right end of the single row centripetal short cylindrical roller bearing, so as to ensure that the main and slave shafts will not bend and deform the shaft after being expanded and elongated.

Summary. The integrated roots blower adopts a three-lobe rotor structure, and the inlet and outlet of the casing are rationally structured, with low vibration and low noise. The impeller and shaft are integrated design, the impeller is not worn, the fan performance is sustainable, and it can run continuously for a long time.

It is a one-in-one Luoyuxi Yinci fan with a three-blade rotten banquet structure, and the structure of the inlet and outlet of the casing is reasonable, with low vibration and low noise. The impeller and shaft are integrated design, the impeller is not worn, the performance of the fan is sustainable, and it can be continuously transported for a long time.

Is this also one?

I checked it for you, and this product is indeed all-in-one.

Do you have a diagram of the rotor?

I'm just answering the question, and I don't have this structure diagram.

Then it's one, if you want to replace the shaft, how to replace it.

The following is the general replacement procedure: first disconnect the roots blower from the power supply and make sure it stops working completely. Dismantle the hood of the roots blower to allow access to the rotor and shaft.

Remove the fasteners, such as nuts or pins, that connect the rotor to the shaft with great care. These fasteners can vary depending on how they are designed and manufactured. Try to separate the rotor from the shaft.

Depending on the type of fastener, special tools such as pry rods, hammers, etc., are sometimes required to assist in disassembly. Once the previous steps are complete, remove the old shaft. You may need to place the roots blower on a suitable bench and use the appropriate tools for disassembly.

Install the new shaft. Make sure the new shaft matches the specifications and dimensions of the roots blower. In reverse order, connect the rotor to the new shaft and secure it with the correct fasteners.

It is said that in 1854, the American Roth brothers invented this fan in the process of designing the hydro wheeler, which had a great influence at the time, which 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 the working principle of roots blower.

Roots blowers are used in many industries, the most common are: chemical smelting, sewage aeration, aquaculture, desulfurization and oxidation, and material handling.

Roots blower is similar to the turbocharger of automobiles, it has the function of forced air supply, which is suitable for places where forced air supply is required. Of course, the resistance of the forced air supply should not exceed the tolerance range of the roots blower.

The conveying medium of the blower is mainly clean air, clean gas, sulfur dioxide and other inert gases. It can also produce and transport other flammable, explosive, corrosive, toxic and special gases on demand. Therefore, it can be widely used in metallurgy, chemical industry, chemical fertilizer, petrochemical, food, building materials, petroleum, mines, textiles, gas stations, pneumatic transportation, sewage treatment and other industrial sectors.

There are many uses of roots fans, such as roots fans for sewage treatment, desulfurization and oxidation fans for cement production, roots fans for food processing, roots fans for grain transportation, and roots fans for grain transportation, which can be used in aquaculture to aerate fish ponds, improve the stocking density of fish fry, and increase the number and density of aquaculture.

In addition, the roots fan of pneumatic conveying type is mainly used for the transmission of feed lime powder, monosodium glutamate, soybean skin and silica, and the transmission of starch, fish meal and other powders.

Roots fans are divided into roots fans, roots blowers, desulfurization and oxidation fans, three-lobe roots fans, three-leaf roots blowers, high-pressure roots fans, intensive roots fans, direct roots fans, and roots fans with connections.

Open-type, roots blower motor has a large vent on the outside, good heat dissipation conditions, and is cheap, but dust, iron filings or oil are easy to invade the inside of the motor, so this form of motor can only be used in a dry and clean working environment. Closed type, roots blower motor is divided into three types: self-cooled, forced ventilation and closed type. The first two types of motors with structures, moisture and dust are not easy to enter the inside of the motor, which can prevent water droplets and other debris from splashing from any direction, and are suitable for various places with moisture, dust, wind and rain erosion, easy to cause disasters, corrosive steam and gas.

Closed motors are generally used in water, and fans are rarely used. Protective type, the vent of the roots blower motor is facing downward, and there is a protective net to cover, and the ventilation and cooling conditions are better. It can generally be drip-proof, rain-proof, splash-proof, and prevent external debris from falling into the motor from the direction of less than 45 ° angle with the vertical direction, but can not prevent the invasion of moisture and dust, so it is suitable for relatively dry, dust-less, non-corrosive and high-quality gas places.

Explosion-proof type, made of flameproof type, increased safety type, positive pressure type and non-spark type on the basis of closed structure, suitable for hazardous environments with flammable gas and air mixtures, such as oil depots, coal loss stations and mines and other sock town places, explosion-proof ventilators are used in this type of motor.

Bearing for the operation of roots blower is of great significance, good bearing can increase the life of roots blower, reduce maintenance costs and improve production efficiency, generally roots blower will use Wafangdian bearing, this bearing has the characteristics of long life, high limit speed, high load resistance and low noise. Its main, from the left end of the shaft adopts a double row of radial spherical bearings. Large and medium-sized roots blowers are adopted, and the right end of the bidirectional radial spherical roller bearing is used by the gear end of the single row radial short cylindrical roller bearing.

The inner ring of the rolling bearing at the left end is locked with a circle nut, and the main and slave shafts of the roots blower are with the rolling bearing at the left end as the support point for axial positioning.

The inner ring of the bearing is confined to the shaft and the outer ring is mounted on the housing in the hole of the front wall plate, so it is necessary to adjust the square cylindrical confinement of the two housings on the shaft and the outer ring to be installed on the housing in the hole of the front wall plate.

Generally, it is high-speed, precise, high-temperature resistant and wear-resistant.

Features The blower does not need lubrication because the impeller runs frictionless in the body, so that the exhaust gas does not contain oil. It is an ideal pneumatic conveying gas source for chemical, food and other industries.

Blowers Blowers are volumetric operating blowers. When used, the flow rate changes very little with the change in pressure. But the flow rate varies with the rotational speed. As a result, there is a wide range of pressure options, and the choice of flow rate can be achieved by selecting the rotational speed.

The speed of the blower is high, and the gap between the rotor and the rotor and between the rotor and the body is small, resulting in less leakage and higher volumetric efficiency.

The structure of the blower determines that its mechanical friction loss is very small. Because only the bearings and gear pairs are in mechanical contact with the material, the rotor, casing and gear ring have sufficient mechanical strength. Safe operation and long service life are the main features of blower products.

The rotor of the blower has been calibrated for static and dynamic balance. The finished product runs smoothly with minimal vibration.

The blowers with the above characteristics mainly include: roots blowers, side channel blowers, and multi-stage centrifugal blowers.

Low noise, smooth operation and no vibration. The efficiency is off, the energy consumption is low, the service life is long, the output air is clean, and the selection is convenient and reasonable.

The roots blower is a volumetric rotary blower. This compressor relies on a synchronous gear at the end of the rotor shaft to keep the two rotors engaged. Each concave curved part on the rotor forms a working volume with the inner wall of the cylinder, and the gas is taken away from the suction port during the rotor rotation process, and when it is moved to the vicinity of the exhaust port and connected with the exhaust port, due to the higher pressure of the gas backflow, the pressure in the working volume rises suddenly, and then the gas is transported to the exhaust channel.

The two rotors are not in contact with each other, and they are sealed with tightly controlled clearances, so that the exhaust gas is not contaminated by lubricating oil.

Its biggest feature is that when the pressure is adjusted within the allowable range, the flow rate changes very little, the pressure selection range is very wide, and it has the characteristics of forced gas transmission. The medium is conveyed without oil. The structure is simple, the maintenance is convenient, the service life is long, and the vibration of the whole machine is small.

Vacuum pump. Due to the pulsation of air velocity and pressure caused by periodic suction and exhaust and instantaneous isochoric compression, large gas-dynamic noise is generated. In addition, the gaps between the rotors and between the rotor and the cylinder can cause gas leaks, which can reduce efficiency.

The exhaust capacity of the roots blower is cubic meters and the speed is 150 3000 rpm. The single-stage pressure ratio is usually less than but can be reached and can be used in multi-stage series.

According to the theory of fluid mechanics, the flow process of the gas will be accompanied by losses. For example, when a gas flows through a throttling device, the pressure of the gas flow decreases accordingly, i.e. they lose the useful work of the fan. Since all this happens during the process of the fan transporting the gas, that is, the energy of the fan is wasted.

The working point of the fan is the intersection point of the performance curve of the fan at a certain speed and the resistance characteristic line of the pipe network. When the wind turbine is actually running, it does not stay at the design working condition point forever. It will change according to the needs of the user or changes in external conditions, that is, the wind turbine is actually working under variable working conditions.

In order to achieve a certain target air pressure or air volume of the fan, it is necessary to artificially control the fan or pipe network, also known as regulation. Through effective regulation, it can meet the requirements of production flow or pressure and maximize energy saving under the condition of ensuring that the fan can work stably. In short, the purpose of regulation is to meet performance requirements, expand (stabilize) operating conditions, achieve energy savings, and prevent surge.

The high pressure of the roots blower can transport the material to the required place, and the high pressure of the roots blower can transport the material to the required place, and the high pressure generated by the roots blower can transport the material to the warehouse for thousands of kilometers, thereby greatly reducing labor.

The roots blower consists of a casing and two fast wall plates to form an air cavity, and there are two impellers in the air cavity, and the impeller is two roots fans, and the main structure is: body, impeller, spindle, wall plate, oil tank, gear, bearing material in turn.

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

The roots blower [1] is a positive displacement blower, with the end face of the impeller and the front and rear end covers of the fan. 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 blower is mainly composed of six parts: motor, air filter, blower body, air chamber, base, and drip nozzle. The blower runs eccentrically on the rotor offset in the cylinder, and the volume change between the blades in the rotor groove sucks the air in, compresses, and expits it.

During operation, the pressure difference of the blower is used to automatically send lubrication to the drip nozzle and drip into the cylinder to reduce friction and noise, while keeping the gas in the cylinder from backflowing.