B rod rotor (impeller)
This type of impeller is made up of a circular rod as a stirring aeration tool, which is composed of some rods regularly fixed to one or two discs, and has nothing in common with the impeller of the pump, so it is often called a rotor. The specific design scheme can be summarized into two categories:
(1) Bars, the bars are vertically downward, in the shape of an open cage, the air is pressed in by the hollow shaft, and the slurry is sucked in by the open (Fig. 8a). In order to meet the needs of large-scale, the second design changed the bar to “teardrop shape”, which is small inside and outside (Fig. 8b). In order to strengthen the slurry circulation, the third design adds a centrifugal pump wheel to the rod rotor (Fig. 8c), which is called the PipsaV impeller. On the Wähmann-type rotor, the rods are inclined downwardly and outwardly. The rod-type flotation machine has a gas-filled rotor similar to the Waman rotor, but the rod-shaped flotation machine uses a composite rotor with a suction pump wheel below the gas-filled rotor. (2) The bar is located between the upper and lower discs. The most typical is the Fagerguren rotor, whose central part of the upper and lower discs are made of spiral blades (one is left-handed and one is right-handed), and the air and the slurry are forced to enter the rotor when rotating. At the same time, the passage of air and slurry is increased, and the diameter is close to the diameter of the rotor. As can be seen from Figure 5, Booth, Vedag, Wimco 1+1 and other self-aspirating flotation machines all use large air passages. The rotor of the French Minimi BCS flotation machine is special, the upper disc is slightly larger than the lower disc, and the rods are arranged in a staggered manner (Fig. 5f). This design allows the slurry to be drawn from the lower portion of the rotor through the hole in the lower disc, thoroughly mixed with the pressurized air entering from the hollow shaft, and then withdrawn from the periphery without the stator being provided.

The ratio of the diameter to the height of the rod rotor is much larger than that of the centrifugal impeller described above, and the ratio is close to one. The reason for this is that the fluid resistance of the rods during exercise is much lower than that of the wide blades of equal height. The rod rotor is used, and the amount of inflation is large and the power consumption is small.
C Hybrid Impeller The impeller design of the new flotation machine has broken through the boundaries between the traditional blade-shaped centrifugal impeller and the rod impeller. As mentioned above, the star impeller of the Wimco 1+1 flotation machine has the characteristics that the rod impeller has a large amount of inflation and the centrifugal impeller has a large amount of slurry flow. The OK flotation machine looks like a half-elliptical ball (Fig. 5g). It is a single-sided impeller according to the relative position of the blade and the disc. However, the blade height is large and the ratio of height to diameter is 0.61, which is close to the rod rotor. The blade is hollow for inflation; in order to uniformly discharge the air from the top to the bottom of the air passage (Fig. 5g) without being affected by the change of hydrostatic pressure, the curve of the blade width along the height is designed by hydrodynamic calculation. This is the unique feature of the OK rotor. Also available in the high blade type impeller: the ike type (Fig. 5a), the Doll Oliver type. [next]
In addition to the above three types of impellers (rotors), there are several attractive impeller designs. For example, the Maxwell flotation cell is similar to a gas-filled circular mixing drum with a propeller type. In the lower part of the impeller, there is an intake pipe at the center of the bottom of the tank, which is supplied by a blower, and the impeller disperses the pressed air into small bubbles. Its construction is very simple, but the maximum tank capacity has reached 56.6 ^m3 , which is a successful design. The Booth flotation machine uses two impellers on one main shaft. The inflatable impeller is a cross-shaped, trapezoidal section with a wide upper and lower narrow. A propeller impeller is placed underneath it for mixing (Fig. 5b). The Denver M-type flotation machine is also equipped with two impellers on the same shaft, and an axial flow pump wheel below the centrifugal impeller. The former is inflated and the latter promotes pulp circulation. They are suitable for the flotation of coarse materials.
In the rotor-stator system, the rotor design is the main aspect that determines the process performance of the flotation machine. However, the role of the stator should not be underestimated.
A stator is disposed on the periphery of the centrifugal impeller. Most of the outer periphery of the bar impeller also has a stator, and only the umbrella-shaped wheel uses a groove bottom plate to replace the stator. The annular impeller also needs to be used with a steady flow plate. The curved vertical vanes on the steady flow plate direct the slurry mixture to rise evenly, that is, to maximize the tangential velocity to a radial velocity and then turn upwards, otherwise liquid level rotation and waves will occur.
Typically, the stator consists of a guide vane fixed to the impeller cover and radial vanes mounted at the bottom of the flotation machine. These two types of vanes are also referred to as diffusers. The function of the stator is the same as that of the steady flow plate, mainly to eliminate the spin of the slurry to ensure the liquid level is stable. When the slurry from the impeller collides with the stator blades, a new vortex is generated. Conducive to entrainment (segmentation) of air and bubble splitting. Therefore, the advantages and disadvantages of the stator design will affect the stability and aeration of the foam layer.
(4) Tank body The shape of the groove of the flotation machine is generally rectangular, and the lower part thereof can also be made circular. The transmission member is directly supported on the tank. Generally, the geometrical characteristics of the tank body can be expressed by the ratio of the groove depth (the distance between the weir and the bottom of the tank) and the width of the groove, which is referred to as the aspect ratio; the ratio of the tangential speed of the impeller to the ratio of the impeller diameter to the groove width (abbreviation) The aspect ratio is related. The depth of the tank is determined by the height necessary for the three zones in the flotation machine, generally between 1 and 2 meters. The volume is particularly large (>16 ^m3 ), exceeding this number. It can be seen that the larger the volume, the smaller the aspect ratio. In general, shallow troughs and deep troughs can be divided by aspect ratio, but there is no clear boundary. Habitually, the aspect ratio is greater than or close to one, which is called deep trough type, and far less than one is called shallow trough type. The aspect ratio is determined by the rotor sub-design. In the same type of flotation machine, the aspect ratio does not change much.

Evotec High Voltage Generator including  7200V Generator ,7200V Synchronous Brushless Generator,1800 Rpm Synchronous Generator and so on.Our alternator are widely used in industry, commercial, real estate, hospital, hotel, railway, telecommunications, data-centers and mining etc.