Introduction of EPDM rubber machine
EPDM rubber is a terpolymer produced by epdm extruders using ethylene, propylene and non-conjugated diene as raw materials. Commercial production began in 1963. Annual consumption worldwide is 800,000 tons. The main... moreIntroduction of EPDM rubber machine
EPDM rubber is a terpolymer produced by epdm extruders using ethylene, propylene and non-conjugated diene as raw materials. Commercial production began in 1963. Annual consumption worldwide is 800,000 tons. The main feature of EPDM is its superior resistance to oxidation, ozone and erosion. Since EPDM rubber belongs to the polyolefin family, it has excellent vulcanization properties. Among all rubbers, EPDM has the lowest specific gravity. It can absorb a large amount of fillers and oils without affecting the characteristics. Therefore, a low-cost rubber compound can be produced.
Molecular structure and properties
Tripropylene is a terpolymer of ethylene, propylene, and a non-conjugated diene. Diene has a special structure, and only one of the two bonds can be copolymerized. The unsaturated double bond is mainly used as a crosslink. The other unsaturated one will not become the polymer backbone, but only the side chains. The main polymer chains of EPDM are fully... less
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When the internal gear pump is designed, the function of the pump is determined: conveying, small pressure difference, low outlet pressure, high-viscosity fluid can also be conveyed, high speed.
The internal gear pump adopts the principle of internal... moreWhen the internal gear pump is designed, the function of the pump is determined: conveying, small pressure difference, low outlet pressure, high-viscosity fluid can also be conveyed, high speed.
The internal gear pump adopts the principle of internal gear engagement. The internal and external gear pitch circles are close to one side, and the other side is separated by a "crescent plate" on the pump cover. The active internal gear on the main shaft drives the external gear to rotate in the same direction. At the inlet, the gears are separated from each other to form a negative pressure to suck in the liquid. The gear is continuously embedded and meshed at the outlet to squeeze the liquid out. Due to this unique structure, it is particularly suitable for conveying medium with high viscosity, and the viscosity range is: 0.2-1000000cp;
1. The internal gear pump can be transported in the reverse direction, as long as the motor is replaced for steering;
2. The internal gear pump body can be turned, the... less
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Hydraulic pumps are manufactured to meet specific system requirements, such as temperature, pressure, and drive type. They are mainly divided into three categories:
Hydraulic gear... moreHydraulic pumps are manufactured to meet specific system requirements, such as temperature, pressure, and drive type. They are mainly divided into three categories:
Hydraulic gear pump
Use spur, helical or herringbone gears in these pumps. Spur gears are usually used, while helical or herringbone gears are expensive and operate quietly.
In a gear pump, fluid is drawn between two meshing gears. The shaft is used to drive one gear while idling the other. The pump casing and the side plate will close the cavity formed between the gears.
The gear pump can withstand a pressure of 210 bar and can run at high speeds of 3000-6000 rpm. External gear pump, internal gear pump, screw pump and ring pump are different classifications of gear pump.
External gear pump
Both industrial and mobile systems use these pumps for a variety of applications, such as lubrication pumps in machine tools, fluid power transmission units and oil pumps in engines. Here, in order to interlock the teeth of the gear pump, one wheel... less
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