High-Pressure Blower

High-pressure blowers, also known as high-pressure fans or vortex fans, are different from ordinary centrifugal high-pressure blowers.Under design conditions, fans with an air pressure of 30kPa~200KPa or a compression ratio e=1.3~3 fall into the category of high-pressure blowers. Currently, in the industry, ring vacuum pumps are generally classified as high-pressure blowers.High-pressure blowers are mainly composed of motors, pump bodies, pump covers, gaskets, impellers, shaft sleeves, bearings, sealing rings and other components.Its applications cover industries such as medical care, pharmaceuticals, food, infrastructure construction, automotive industry, plastic industry, chemical industry, electrical and electronic industry, light industry and textile, shipping and railway, aerospace engineering, etc. With a wide application range, it meets the needs of equipment cleaning, material drying treatment and other requirements in various industries.

The impeller of a high-pressure blower is composed of dozens of blades, which is similar to the impeller of a large gas turbine.The air in the middle of the impeller blades is affected by centrifugal force and moves to the edge of the impeller. There, the air enters the annular cavity of the pump body and circulates again from the starting point of the blades in the same way.The circulating air flow generated by the rotation of the impeller leaves the air pump with extremely high energy for use.The high-pressure blower adopts a dedicated motor, featuring a compact structure, small size, light weight, low noise, and the delivered air source is free of water and oil.

Working Principle of High-Pressure Blower:

When the impeller rotates, due to the effect of centrifugal force, the wind deflector promotes the gas to move forward and outward, thereby forming a series of spiral movements.The air between the impeller blades rotates in a spiral and accelerates, squeezing the gas outside the pump body into the side groove (sucked in through the suction port). After entering the side channel, the gas is compressed and then returns to the space between the impeller blades to accelerate rotation again.When the air passes through the impeller and the side groove along a spiral path, each impeller blade increases the degree of compression and acceleration. As the rotation proceeds, the kinetic energy of the gas increases, which further increases the pressure of the gas passing through the side channel.When the air reaches the connection point between the side groove and the discharge flange (the side channel narrows at the outlet), the gas is squeezed out of the blades and discharged from the pump body through the outlet muffler.

Classification of High-Pressure Fan:

• Electric Type: The electric type uses a motor as power and is further subdivided into mechanical type and hydraulic type.
• Mechanical Type: The motor drives the crankshaft to make the plunger reciprocate, directly increasing the pressure of the material.With continuous pressure supplied by multiple groups of plungers, it has high homogeneous pressure and large output. However, it requires a large amount of materials. At the same time, the motor driving the crankshaft requires a multi-stage reduction mechanism, resulting in average equipment efficiency and large volume. It is suitable for large-scale production.
• Hydraulic Type: The motor drives the oil pump to increase the pressure of the material through the hydraulic system.The hydraulic system can provide higher pressure, with high equipment efficiency, relatively small volume and less material consumption. It is suitable for both experiments and production.
• Manual Type: The pressure of the material is increased through a manual lever mechanism.Due to manual pressure increase, its production capacity is low, but it has the advantages of easy disassembly and assembly and portability. At the same time, it requires a small amount of materials, so it is very suitable for small-volume experiments and can fully meet the R&D needs of laboratories.
• Pneumatic Type: It converts the pressure of compressed gas into hydraulic pressure.This equipment requires the support of nitrogen cylinders or air compressors, with large gas consumption and generally low homogeneous pressure. However, since there is no independent pressure-increasing mechanism, it has a small volume and is suitable for use in places equipped with air compressors.

Composition Structure of High-Pressure Fan:

High-pressure blowers are composed of shafts, impellers, bearings, synchronous gears, couplings, shaft sleeves, etc.

• Impeller: It adopts an involute profile, with high volume utilization rate.
• Bearing: The end close to the coupling is used as the positioning end, and a 3000-type double-row radial spherical roller bearing is selected. The end close to the gear is used as the free end, and a 32000-type single-row radial short cylindrical roller bearing is selected to adapt to the axial displacement of the rotor during thermal expansion.
• Synchronous Gear: Composed of a gear ring and a hub, it is convenient to adjust the impeller gap.
• Transmission Method: Mainly direct connection with a coupling. If required by performance standards, a V-belt pulley speed change method can also be selected. The coupling adopts an elastic coupling, which can mitigate impacts and compensate for minor axial errors.

Application Scope and Environment of Vortex Fan:

• Vacuum Suction Conveying and Vacuum Adsorption Applications: (Injection Molding Machine) Automatic Feeder, Automatic Conveyor, Central Feeding Machine, Vacuum Cleaner, Industrial Vacuum Cleaner; Injection Molding Machine, Vacuum Manipulator, Vacuum Crane, Vacuum Lifter, Leather Engraving Machine, Pad Printing Machine, Screen Printing Machine, Ventilation and Environmental Protection.
• Artificial Oxygenation: Oxygen supply at mine and tunnel construction sites, elimination of hazardous gas environments, oxygen supply in confined spaces, oxygen supply for fish ponds, oxygenation for aquaculture ponds.
• Air Agitation: Electroplating Agitation, PCB Chemical Reaction Tank Agitation, Other Chemical Reaction Tank Agitation, Water Treatment Aeration, Sanitary Ware, Swimming Pools, Hot Spring Equipment, Artificial Wave Engineering, Soil Purification Treatment.

Selection Notes for Vortex Fan:

Due to the wide application of high-pressure blowers, their selection is relatively complex. Generally, it needs to be carried out in the following two steps:

It is necessary to determine which function of the high-pressure blower is to be used on-site, whether it is suction or blowing, and find the corresponding pressure-flow curve of the high-pressure blower; Misreading the curve may sometimes result in the selected product being unusable.

Based on the calculated pressure and flow rate, find the working curve above the working point that meets both pressure and flow rate requirements on the curve graph; Then select the high-pressure blower model according to the working curve.

Installation Notes for High-Pressure Blowers:

• Flat washers and spring washers must be used to fasten the screws.
• It is better to use rubber buffer rubber to bear the weight of the high-pressure blower, which is essential especially for high-power high-pressure blowers.
• For occasions with noise requirements, a muffler can be installed to reduce noise (generally, by about 5dB). The muffler is installed at the end of the air inlet pipe or air outlet pipe.
• For occasions with high noise requirements, a layer of sound-absorbing cotton can be added according to the conditions of the machine itself to meet the on-site noise requirements. For details, you can consult high-pressure blower manufacturers or professional noise control companies.
• When using sound-absorbing cotton for noise reduction, pay attention to the distance between the high-pressure blower and the cabinet, the ventilation and heat dissipation of the high-pressure blower, and use rubber buffer rubber to bear the weight of the high-pressure blower. For details, you need to consult the high-pressure blower manufacturer.
• The air inlet and outlet pipes of the high-pressure blower should be connected with hoses to isolate vibration.

Maintenance of High-Pressure Blowers:

• Check the tightness of all parts and whether the positioning pins are loose. If loose, fasten them.
• Check whether there is oil leakage inside the blower body.
• There should be no scaling, rusting or peeling inside the blower body.
• Pay attention to whether the lubricating oil cooling is normal, the quality of the lubricating oil, often listen to whether there is abnormal noise during the operation of the blower, and pay attention to whether the unit is working under non-compliant operating conditions.
• The overload of the blower is sometimes not displayed immediately, so pay attention to the changes in inlet and exhaust pressure, bearing temperature and motor current to judge whether the machine is operating normally.
• When disassembling the machine, measure the matching dimensions of the machine, make records, and mark the parts with their positions and directions to ensure assembly and maintain the original matching requirements.
• For new machines or blowers after major maintenance, put them into operation according to the usage steps. It is recommended to replace all lubricating oil after 8 hours of operation.
• Under normal conditions, the unit is required to replace the lubricating oil after 1000 hours of operation. After-sales service for failure to change oil on time is not within the scope of free three guarantees.
• Daily maintenance is very important. Minor faults must be repaired before putting the machine into use again.

Technical Parameters

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