Screw pump is a positive displacement rotor pump, which is composed of the pump screw tooth shape and the formation of a plurality of sealed chamber displacement to suction and discharge liquid. There are no theoretical leakage channels between two adjacent sealed chambers in the screw pump, which are called strictly sealed screw pumps, whereas non-strictly sealed screw pumps.
æ¤ The current practical application and relevant data show that the application of screw pump is very wide. It features smooth flow, small pressure pulsation, self-absorption, low noise, high efficiency, long life, small volume and reliable operation. Prominent advantage is that the transmission medium does not form a vortex, conveying a wide range of viscosity medium, can transport a variety of viscosity lubricity or corrosive media, but also can deliver a variety of viscosity non-Newtonian liquid, but also gas and liquid Mixed transport, solid-liquid mixed transport. It is widely used in offshore platform engineering, petrochemical, shipping, electric power, mechanical hydraulics, food, paper, sugar, military and sewage treatment and other industrial sectors. In the words of the sales manager at Alwiller in Germany, "There is no medium in the world that can not be delivered by screw pumps."
Said screw pump can convey any medium. Certainly not to say that a particular type of screw pump can deliver all of the media, but different types of screw pumps can be selected depending on the characteristics of the media and the number of performance parameters. Screw pump according to the number of the screw is usually divided into single screw pump, double, triple and five screw pump, each have their own advantages, the promotion of the use of screw pump must have the choice, only make full use of their respective characteristics in order to better achieve energy saving, section Material, benefit or meet some special requirements.
Single-screw pump sleeve is made of non-metallic elastic material (usually rubber), the hole is spiral groove shape, with a helical metal screw to form a number of sealed chamber. Metallic screw for eccentric rotation, so that the seal cavity by the pump low-pressure area displacement to the high-pressure zone, the completion of inhalation, the liquid discharge and the formation of the entire process of pressure. In addition to the general medium, the single screw pump can deliver suspensions and special media containing metal particles, fibers, etc. In the treatment of sewage, mud, commonly used single-screw pump, usually working pressure is not high.
The traditional twin-screw pump is a non-strictly sealed type screw pump. The pump sleeve made of metal material has two phase-cut cylindrical cavities. Two screw rods in the cavity are meshed with each other. Between the formation of a number of sealed chamber. Screw for rotational movement, the sealed chamber by the pump low-pressure zone displacement to the high-pressure zone. There are single helix, there are double helix twin screw pump, lubrication medium, if the screw angle is large enough, the main screw can directly drive the sub-screw. If accompanied by synchronous gear, in theory, there can be no contact between the two screws. Although the traditional twin-screw pump is not strictly sealed and the working pressure is not high, it can transport a wide range of media with a wide range of viscosities and can deliver non-Newtonian liquids of various viscosities. Therefore, all industries have great interest in it, especially the petroleum and chemical industries.
Three screw pump theory is strictly sealed screw pump. In the textbook, it is usually introduced as a typical screw pump. Three screw pump is set by the metal pump in a main screw driven two driven screw composition. Each screw has two spiral lines, the pump sleeve and the screw to form a number of sealed chamber, the screw for rotational movement, the sealed chamber from the pump low-pressure zone displacement to the high-pressure zone. Three screw pump maximum working pressure up to 30MPa, the transmission medium for the clean, non-corrosive lubricants, special occasions can convey high viscosity, non-corrosive media (such as: ink, glue, etc.). Due to the three screw 1: 3: 5 ratio of the size of the structure and other reasons, three screw pump medium viscosity limited range, generally limited to the lubricating medium.
Five screw pump is usually non-strictly sealed screw pump. A main screw drives four sub-screws, each screw has two helical lines. Due to the pump chamber cross-section larger flow, so the media delivery capacity. Five screw pump working pressure is usually below 0.8MPa, often in the installation of restricted size special occasions (such as: ships, ships, etc.) for the oil pump.
Manual PU foam making machine
Main Usage:
This machine is mostly used for mixing , stirring and foaming raw material for foam
rubber.Adopting high speed and low speed segment with timing willingly controlled function ,
it also fits parking willingly electron brake device , the Operation is simpler and the foaming quality is better.
Foaming Machine is an economic type of auto batching machine that is used for making all kinds of PU foam.
1. Main machine:
* 200kgs of main mixing tank with Teflon coating
* 15kw motor (Siemens) and 15kw inverter ( Taiwanese Delta)
* 50L of transfer tank with automatic vale for TDI
* 1 set of 3 way pneumatic valve for TDI ( Taiwanese)
* 1 set of 3 way pneumatic valve for water (Taiwanese)
* 1 set of 3 way pneumatic valve for mixture (Taiwanese)
* 1 set of controlling center
* Touch screen ( TL1310/HCFA 10 inch) + PLC ( Mitsubishi) + Electrical components ( Fuji)
2. Metering pumps.
* 1 set magnetic pump DPMY-6/0.4 ( Chinese ) for TDI
* 1 set gearing pump GPY-11.5R ( Japanese) for water
* 1 set gearing pump KCB200(Chinese) for mixture ( PPG+ silicone + tin + amine + CaCO3+color +-)
* And their connecting pipes
3. Tanks.
*1 set of 100kgs tank for water.
*1 set of 1 ton mixing tank for mixture ( PPG + silicone + tin + amine + CaCO3+color +-)
Note: TDI tank just use it`s packing jug directly.
4. Moulding box. ( customized size) 1 set moulding box with carrying wheel.
5. Air compressor: 1 set
6. Electronic scale: 100kgs-1set, 5kgs-1set
Pu Foam Spray Machine,Manual Foaming Machine,Foam Production Machine,Pu Foam Injection Machine
SOFTLIFE MATTRESS MACHINERY CO.,LTD , https://www.machinesoftlifefoam.com