Three screw pump is the use of screw rotation to suction and discharge liquid. The middle of the screw for the active screw, driven by the prime mover rotation, the screw on both sides of the driven screw, with the active screw for reverse rotation. The main, driven screw thread are double-headed thread. Due to the mutual engagement of the screws and the tight fit of the screw with the inner wall of the liner, one or more sealed spaces are separated between the suction and discharge of the pump. As the screw is rotated and engaged, these sealed spaces are constantly formed at the suction side of the pump, sealing the liquid in the suction chamber therein and continuously displacing in the axial direction of the screw from the suction chamber to the discharge end to be closed in the respective spaces Continued discharge of liquid, like a nut in the screw rotation is constantly moving forward, as the case, which is the basic working principle of the screw pump. The sealing surface between the screw and the housing is a curved surface. There are unsealed areas such as ab or de on this surface and a number of triangular notches abc, def with the groove portion of the screw. The notches of these triangles form a passage for the liquid, allowing the drive screw groove A to communicate with the grooves B, C in the driven screw. The grooves B, C, along with their spiral around the back, respectively, and the back of the grooves D, E communicated. Since there are also triangular notches a'b'c 'similar to the front face on the sealing surfaces where the grooves D, E engage with the groove F (which belongs to the other thread), D, F, E will also communicate. In this way, the groove ABCDEA also form a "∞" -shaped sealing space (such as the use of single-head thread, the groove will be along the axial disk Rao screw, the suction port through, can not form a seal). Not hard to imagine, in such a screw, will form a number of independent "∞" -shaped sealed space, each sealed space occupies the axial length exactly equal to the lead of the tired rod t. Therefore, in order to make the suction and discharge of the screw, the length of the screw thread should be longer than one lead. From the above work can be seen (a) screw pump has the following advantages: 1) wide range of pressure and flow. A pressure of about 3.4-340 kgf / cm 2, a flow rate of up to 18,600 cm 3 / min; 2) a wide range of types and viscosities for transporting the liquid; and 3) a high rotational speed ; 4) good suction performance, self-priming capability; 5) uniform flow rate, low vibration, low noise; 6) compared with other rotary pumps, the gas and dirt into the less sensitive; 7) solid structure, installation Easy to maintain. The disadvantage of the screw pump is that the screw machining and assembly requirements are higher; the performance of the pump is sensitive to changes in the viscosity of the liquid. (B) the working principle Screw pump is a positive displacement pump, the main components are the rotor and stator, the rotor is a large gear teeth large and small screw inner diameter of the screw (rotor) stator is matched double helix and Loops, thus forming a space between the rotor and the stator storage medium, when the rotor is running in the stator, the medium axially from the suction end to the discharge movement. (C) Features ★ Helical seal line between the stator and the rotor completely separates the income chamber from the discharge chamber, so that the pump has the function of the valve. ★ It can realize the multiphase mixing of liquid, gas and solid. Change, there is no Swiss flow agitation and pulse ★ elastic stator cavity volume can effectively reduce the transmission of solid particles containing medium wear ★ input medium viscosity up to 50000Mpa · s solid content of up to 50% ★ flow and speed proportional , With the governor can achieve the amount of automatic adjustment pump can be transported forward and reverse. Screw pump has the following advantages: 1, compared with the centrifugal pump without the need to install the valve flow is a stable linear flow 2, compared with the plunger pump self-priming capability, high suction height 3, and diaphragm pump phase Than the screw pump can convey a variety of mixed impurities containing gas and solid particles or fibers of the medium, but also convey a variety of corrosive substances 4, and gear compared to the screw pump can deliver high viscosity material 5, and the plunger pump, diaphragm Pump and gear pump is different, the screw pump can be used for filling and metering drugs
Trunking Rail System
The trunking Rail system mainly contains some accessories that match the Grille Light, such as rails, trunking, Connection Accessories, and Suspension Accessories. Because there are many ways to install this Grille Light.
Guide Rail: This installation method relies on the Track head to conduct electricity, and the Led Grille Light can move freely on the rail.
Bridge: This installation method is to connect trunkings with Connection accessories, and the wires can enter the lamp body through trunking. The entire lamp body can be hoisted and ceiling mounted.
Trunking: Although this model and Bridge have trunking, the two styles of trunking are different. This type of trunking is already wired before leaving the factory. In other words, as long as the first one is connected to the mains, the other lights are connected to the lights.
If you want to understand these installation methods more clearly, you can watch the video.
If you don't know what accessories you need, as long as you tell us your needs, we can match them for you.
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