What are the precautions before starting the three leaf roots blower?

Working principle of roots blower; The motor drives the roots blower through the V-belt, and the air chamber of the body is equipped with two sets of impellers, which rotate in the opposite direction, and when rotating in the opposite direction, the suction side generates low pressure due to the change of volume V1, and inhales the air to balance the pressure, and forms the air of the volume V2, and then sends the air out of the discharge side, and the high pressure is generated by the resistance of the discharge outlet. Since there is a certain gap between the two impellers, there is no friction between the two impellers, so there is no need to add any lubricant between the impellers, and the clean air can be discharged at high speed. 1.

Do not install roots blowers in places where flammable and corrosive gases such as organic solvents and paints are likely to be generated to prevent fire and poisoning. 2.Please do not install the fan in a place where people often pass and children often come and go to prevent injuries and burns.

3.Roots blower room temperature....

Check whether the anchor bolts and other connections are secure. Remove foreign objects such as welding slag in the pipeline. The valve should be placed in the fully open state, otherwise the fan will be overloaded and the fan will be damaged.

Check the three-lobe roots blower for gear oil. When leaving the factory, the oil tank has been filled with gear oil, please check the oil level in the gearbox. In the shutdown state, add to the oil window**, do not add more, otherwise it will lead to oil leakage.

Bearings are greased. The fan is running normally, and it is filled once or twice a week depending on the actual working conditions. Check the tightness of the narrow V-belt and the alignment of the pulley.

The belt pulley deviation can be adjusted with a ruler. The tightness of the belt can be adjusted by referring to the table below. When used for a period of time, the belt will become loose, at which point it should be readjusted.

Check that the power supply voltage and frequency are in line with the parameters on the motor. Check pulley steering. Facing the pulley, the pulley steering should be consistent with the rotation sign arrow.

Before starting the three-leaf roots blower, turn the pulley by hand, and if there is no abnormality, the fan can be started.

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.

Compared with the two-lobe type, the three-lobe roots blower has less gas pulsation, less vibration and lower noise. The impeller on the two shafts of the fan and the inner hole surface of the oval shell, the end face of the impeller and the front and rear end covers of the fan and between the fan impeller always maintain a small gap, and the wind is transported from the air inlet of the fan along the inner wall of the shell to the discharged side under the drive of the synchronous gear. The inner cavity of the fan does not need lubricating oil, the structure is simple, the operation is stable, the performance is stable, it is suitable for a variety of purposes, and has been used in a wide range of fields.

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.

Precautions for mechanical installation of roots blower: 1. The roots blower should be installed in a place with a strong and solid ground, and there should be sufficient leeway around it to facilitate inspection, maintenance and maintenance. 2. The foundation should be kept level under the base of the roots blower, and it is recommended to pad the shock-absorbing rubber at the four corners of the base or cast it with bolts to ensure that the roots blower runs smoothly and has little vibration.

3. When the roots blower is energized and put into trial operation, the motor belt must be removed to confirm that the vacuum pump is turned in accordance with the specified direction before it can be put into use, and the roots blower is reversed to inject oil. **Direction indicated by the protective cover) 4. For roots fans with cooling water, turn on the cooling water according to the regulations. 5. If the solenoid valve is installed at the mouth of the roots blower, the valve and the roots blower should act at the same time.

6. When the exhaust gas of the roots blower affects the working environment, the exhaust port can be installed to connect the pipe to lead away or install the oil mist filter. Excerpted from the instruction manual of Jingong three-leaf roots blower.

Check the tightness of each part of the roots blower and whether the dowel pins are loose. If it is loose, it must be tightened. There should be no scale, rust and peeling in the fan body.

Prevent leakage. Sometimes it is not immediately possible to show the overload of the roots drum collapse fan, so pay attention to the changes in the intake mass stove and exhaust pressure, bearing temperature and engine power to determine if the machine is operating properly. Under normal circumstances, the equipment must be operated for 1000 hours to change the lubricating oil.

Pay attention to whether the lubrication of the lubricating oil is normal. Pay attention to the quality of the lubricating oil. Always listen to the operation of the roots blower, whether there is noise or not.

Pay attention to whether the equipment is operating under the specified operating conditions.

Carefully read the instruction manual and product samples of the roots blower, and be familiar with and understand the specifications, forms, impeller rotation direction and airflow inlet and outlet directions of the roots blower; Check again whether the parts of the roots blower are in good condition, otherwise they should be repaired before they can be installed and used. Roots blowers are installed with safety devices to prevent accidents and are installed and wired by professionals who are familiar with the relevant safety requirements. After the roots blower is installed, turn the impeller by hand or lever to check whether there is too tight or rubbing, whether there are any items that hinder the rotation, and there is no abnormal phenomenon, before the test run can be carried out.

The power distribution control box of the roots blower is matched with the corresponding fan. The wiring of the roots drum vertical volt fan should be wired by a professional electrician, and the wiring is correct and reliable, especially the wiring number at the electric control box is consistent with the number on the fan binding post, and the roots blower shell should be reliably grounded, grounded reliably, and cannot be grounded with zero.

Before installing a roots blower, the parts to be used should be cleaned and inspected. With regard to the disassembled parts, the appearance of the processed should be protected and placed in accordance with certain rules. Parts in the same assembly, such as housings, bearing gland and adjusting washers for the same part, should be put together.

Missing parts should be included in the dedicated equipment. Matching applications should be stored together.

a. The foundation of the fan is required to be horizontal and firm, and the foundation height is 200mm.

b. The fan and the air duct are connected by a hose (flexible material and non-combusting), the length should not be less than 200mm, and the pipe diameter should be the same as the size of the inlet and outlet of the fan. In order to ensure that the hose does not appear twisted and deformed during the operation of the system, it should be installed with appropriate tightness. For the canvas hose installed at the suction end of the fan, it can be installed slightly tighter to prevent the fan from being sucked in during operation and reduce the cross-sectional size of the canvas hose.

c. The steel bracket of the fan must be fixed on the concrete foundation, and a rubber damping pad must be added between the steel bracket and the foundation of the fan. All fan and motor components are mounted on a single steel bracket, and the steel ground frame is mounted on a vibration damping pad on the top of the foundation, and the vibration damping pad is preferably made of porous rubber sheet.

d. The pipe diameter of the fan outlet can only be larger, not smaller, and finally the air outlet should be installed with an insect-proof net, and the wind and rain cap must be added when the air is biased upward.

Roots blower and roots blower are the most common blower equipment used in industrial production. In actual use, in order to ensure the use effect of roots blower and roots blower and the continuity of factory operation, manufacturers often configure two or more sets of roots blower system to switch flexibly to ensure the service life of roots blower and roots blower. So how to realize the switching operation in the operation of roots blower and roots blower to minimize the impact of switching on various aspects?

1. Check the standby machine of the roots blower system and make preparations before opening. For example, check whether the valve switches of the roots blower and the roots blower standby machine are in place, and ensure that the outlet valve of the roots blower is fully closed and the inlet valve is fully open. After checking that it is normal, turn on the standby machine of the roots blower according to the operating procedures.

2. At the same time, the standby fan of the roots fan is turned on and the fan in use is stopped. When the standby fan is running normally, slowly close the outlet of the machine and open the standby fan circuit. At the same time, gradually close the secondary valve of the standby fan, so that the outlet pressure is slightly greater than the working pressure of the outlet of the fan to be stopped.

At the same time of the above operation, gradually open the auxiliary valve of the fan in use, and at the same time, gradually close the outlet valve of the fan in use, so that the outlet pressure is slightly greater than the original outlet working pressure. In this whole process, it is necessary to keep the fan pressure outlet pressure balanced and try to ensure that the system pressure is stable. 3. Gradually close the secondary line valve and outlet valve of the roots blower in use until it is completely closed, and open the secondary valve and outlet valve of the standby roots blower until it is fully opened, so that the operation of the machine in use is stopped and the switching operation of the roots blower is completed.

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

The working point of the roots blower 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 roots blower actually operates, it will not stay at the design working condition point forever, it will change with the user's needs or the change of external conditions, that is, the roots blower 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 roots fan or pipe network, also known as regulation. Through effective adjustment, it can not only meet the requirements of production flow or pressure under the condition of ensuring the stable operation of the roots blower, but also maximize energy saving.

The purpose of roots blower adjustment is to meet the performance requirements, expand the working conditions, achieve energy saving, and prevent surge.

This type of compressor keeps the two rotors engaged by a synchronous gear at the end of the rotor shaft. Each concave curved surface part of the rotor and the inner wall of the cylinder constitute the working volume, and during rotor rotation, the gas is carried away from the suction port as it moves near the exhaust port. Due to the higher pressure, it communicates with the exhaust port.

Gas recirculation, when the pressure in the working volume rises abruptly and the gas is then transported to the exhaust channel. The two rotors are not in contact with each other, and the seals are tightly controlled by the gap between them, so that the exhaust gas is not contaminated by the lubricating oil.