Five Factors To Consider When Choosing A Roots Blower. The selection of Roots blower is the same as that of other fans. It is necessary to know certain parameters to determine the blower type. As a pneumatic conveying device, it is widely used in the chemical industry, metallurgical industry, and the environmental protection industry. When choosing the model, we must calculate the technical parameters precisely. If the model is too big, it will waste power and capital; too small can not meet the requirements of working conditions. Let's discuss with you the following parameters, which will influence the selection of roots blowers.
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The airflow parameter refers to the volume of gas delivered by the roots blower per unit time. The general unit of measurement is: m³/min or m³/h. In some industries, the roots blowers are only auxiliary equipment, and it is impossible to estimate the required air volume parameters, such as cement transportation and boiler return. Under these conditions, it is only possible to provide the delivery volume per unit time, such as: conveying 15 tons of cement per hour; the material throughput data can also help us estimate the air volume. The air volume parameter is one of the parameters that must be mastered when the Roots blower is selected.
The pressure parameter refers to the outlet pressure of the Roots blower and also refers to the pressure that the Roots blower needs to overcome. The Roots blower itself does not generate pressure. Its ability to overcome the pressure of the front pipeline, we call it 'Roots Blower pressure.' Because the Roots blower is a positive displacement blower, the pressure depends on the front pipe and atmospheric pressure, which is what we often call 'back pressure'. The pressure gauge will show the exact pressure. If the pressure exceeds the rated pressure, the Roots blower will be in an overpressure condition and the motor will burn down easily.
The above two parameters are the necessary parameters for the selection of Roots blower. The following parameters are also very important. What are the parameters?
There are two main transmission modes for Roots blowers. One is belt drive and the other is direct drive. In some industries, there are strict requirements for the speed of the Roots blower. So, what effect does the rotary speed have on the blower?
The Rotate speed affects two aspects, one is the air volume, and the other is the service life of the blower. When all the parameters are the same except the rotate speed, the higher the speed, the larger the blower volume. However, the abrasion of the blower will be more serious. We can say that the blower with high speed will be shorter in service life. From this point we can know the importance of the speed parameter.
The roots blowers can not transport all kinds of gas, such as gas with High acidity and alkalinity and flammable and explosive gases. For example: strong corrosive gas. We can manufacture the roots blowers with special material, but the strong corrosive gas can damage the roots blower easily. In this case, the blower is not suitable for these working conditions. Most of the roots blowers in the market are made from cast irons and stainless steel with their own application standard. Therefore, when selecting according to the air volume and pressure, there are certain requirements for the transport medium.
We also need to consider one parameter: the sealing method. Generally, the sealing method of Roots blowers are labyrinths. However, when special gases are transported, special sealing methods such as piston ring seals and mechanical seals may be required. The difference in the sealing method will cause the price of the model to fluctuate, which is also one of the necessary parameters for selection.
Above are the parameters that must be considered when the Roots blower is selected. Only selected according to the parameters can the Roots Blowers meet your requirements.
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Powder conveying blower manufacturer: what is Roots blower
The principle of Roots blower is:The impeller is rotated directly driven by the motor. In the operation of the air convection and pressure difference, the machine gas inhalation and compression (vacuum pump) and then discharged; when the volume of the discharged gas is greater than the entrance of the gas, that is, along the axial direction into the suction chamber again for compression and improve its temperature and air pressure. This repeated cycle to achieve continuous pumping or exhaust process, so as to achieve the purpose of conveying media. Due to the special simple and compact mechanical structure, easy to install, reliable operation and long service life, no wearing parts and easy maintenance and other advantages, and is widely used in chemical fertilizers, food, pharmaceutical, building materials, electric power and other industrial fields. According to different uses can choose explosion-proof type ordinary type and explosion-proof type three types.
Powder conveying blower manufacturers: how to choose the right Roots blower
1'Select the model
(1) Determine the size of the required air volume and the required pressure ratio range
(2) Consider the size of the motor power
(3) Calculate the required rotational speed
(4) Decide the model specifications
(5) Pay attention to the choice of supporting equipment
2'Material requirement of stator and rotor
(1) Made of alloy steel material
(2) Have enough strength
3'Requirements for bearing type
(1) Use high-precision special grease
(2) Fill the bearing holes with grease.
4'Requirements of transmission mode
(1)Gear type
(2) Belt drive
5'Protection level requirements
6'Other requirements
(1)Good sealing performance
(2) Good corrosion resistance performance
Powder conveying blower manufacturers: what are the precautions for purchase
1'Before buying should first understand the technical indicators of the product
Such as flow Q / Hm3 / h, export static pressure P0 / P1MPa, efficiency E2 / η = 1- 0.9, inlet dynamic pressure Pa = 10 - 20Kpa.
2, according to the product samples to provide the parameter value to select
For example: if you need to match the cooling tower, specify the air inlet size D2mm × D3 mm or outlet size D4mm × D5mm, etc.. Should also provide the corresponding piping connection diagram.
3, check the appearance of quality
Including the parts of the damage, deformation and paint peeling and other conditions, such as abnormalities should be promptly notified to the manufacturer to replace parts or return processing. (Note: due to different manufacturers of different production process levels resulting in product quality differences.)
4, test run
Turn on the power switch to start the machine rotation for 2-3 minutes to observe whether there is a murmur or other abnormal phenomena, if there should be immediately shut down for inspection and troubleshooting before restarting the test.
Powder conveying blower manufacturers: Roots fan to pay attention to what matters?
(1)Regular maintenance and repair is required, in order to ensure safety and longevity of service life, it is necessary to regularly clean the filter and other parts to remove dust and dirt to prevent clogging of the filter.
2)Do not overload the filter.
3)Do not stay under high temperature for a long time.
4) Avoid being close to the heat source.
5)Prohibit starting with empty vehicle
6)Strictly prohibit lifting with loads
7)Reverse rotation at high speed is not allowed
8)Do not frequently start and stop the blower
9)When oil leakage is found, it should be repaired in time.
10)Cut off the power supply line when it is not used for a long time.Translated with DeepL.com (free version)
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