2014年7月22日星期二

Titanium pump, use and performance of titanium alloy pump

Titanium pump, titanium alloy pump is a kind of strong corrosion resistant pump, suitable for alkali acid alkali acid pump, so it is called. Corrosion characteristic of the strong, the key lies in the metal titanium. The following are the titanium and titanium alloy material corrosion property, knew titanium pump, titanium alloy pump can use the occasion and effect. Titanium belongs to the precious metal, its relative low density, high strength, high strength ratio. There are in a particular environment and excellent corrosion resistance. Titanium alloy after after, can make its strength greatly increased (the most widely used is the TC4). (1) such as Titanium alloy valves and titanium alloy corrosion resistance of titanium material has a high degree of stability in the oxide solution, neutral or weak acid, HgC1: titanium and titanium alloy at 100 ℃ FeCl100 ℃, 100 ℃ (CuC 12 all concentration) are stable in all concentrations of NaCl, 60% AlCl2 and 100 ℃ in many other metals, titanium oxide, is stable at two oxygen ethanoic acid 100% Phenoxy Acetic Acid and 100%, so that the titanium and titanium alloy have been widely used in the solution. Titanium and titanium alloy has high stability for the oxidant solution containing ions, such as 100qC hypo sodium chlorate solution, oxygen water, gas (75 ℃), the sodium hydroxide solution containing hydrogen peroxide. Titanium and titanium alloy corrosion resistance in the wet chlorine gas than other commonly used metal, this is because the chlorine with strong oxidation, titanium and titanium alloy are stable passive in the wet chlorine, in order to maintain the blunt titanium in chlorine, need certain moisture content. The relevant factors of the critical water content and oxygen pressure, velocity, temperature, and the titanium equipment or parts of the shape and size as well as mechanical damage on surface of Titanium alloy sheet  therefore, is generally believed that the critical moisture content on the passivation of titanium in oxygen in the literature is inconsistent,, mass fraction is 0.01% ~ 0.05% can be used as the critical moisture content of titanium in oxygen, but the actual experience, in order to ensure the safe use of titanium equipment in oxygen, and sometimes the water content of 0.6% is not enough, need to be as high as 1.5%. The critical moisture content also increased with increase of temperature and air speed reducing chlorine increased. The actual operation experience also shows that, the oxide film on the surface of titanium and titanium alloy after the destruction, require a higher water content to make titanium and titanium alloy passivation again.

2014年7月7日星期一

Vacuum titanium pump works

The core of the operation of the vacuum booster is: In the non-operation state, the control valve plunger return spring to push the valve rod locking position of the locking tab to the right, the vacuum port is open the check valve, the control valve spring make contact with the air control valve seat cup confidential, thus forcing the air valve port official. When titanium pump raking, the brake pedal, the pedal force is amplified by the leverage effect on the control valve putter. First, the control valve return spring is compressed putter, putter along with the air control valve spool move forward. When the titanium alloy pump pre-control valve pushrod cup position when you move the control valve and the vacuum check valve seat in contact with the vacuum check valve port closed. Titanium pump the female power supply is high, the no-load output voltage between 3 to 7KV, but the load current, the output voltage is reduced to about 400V, Titanium sheet can flow through the anode and cathode discharge current drawn reflect the space vacuum. Therefore, the pump power can be reflected titanium pump by the ion pressure and size. So it degassing principle what is it: 1, active gas extraction. 2, the hydrogen extraction. 3, inert gas extraction.

2014年7月5日星期六

The structure and the type of titanium pump

Titanium pump, is in equipment manufacturing material, which has the use of titanium and titanium alloy corrosion, the proportion of small, high strength, goodcomprehensive mechanical performance at high and low temperature characteristics,flow components, in the impeller and the packing seal node used in the manufacture of titanium or titanium alloy. The pump has excellent corrosion resistance, resistance to most organic acid, inorganic acid, organic compounds and alkali, salt solution corrosion, is suitable for the transport of solid particles, easy crystal medium,especially for long period operation, improve economy. To overcome the shortage ofpacking and mechanical seals, has the advantages of simple structure, reliablesealing, but also a fundamental solution of packing seal, packing is easy to wearsleeve. Now widely used in soda, salt making, metallurgy and petrochemical industry.A corrosion resistant pump. That made of titanium ortitanium alloy pump with contactand was sent to the liquid parts. Chemical titanium or titanium alloy pump is centrifugal pump. Can be used for conveying a variety of organic and inorganic corrosive liquid,especially suitable for transporting chlorine salt solution, can not convey the fuming nitric acid, hydrofluoric acid, hydrochloric acid concentration >30%. Titanium and Titanium alloy sheets prices more expensive, generally do not only in corrosion resisting pump other material under the condition of application. Titanium or titanium alloycentrifugal pump is generally casting and welding system, the flow rate of 5.7 ~400m3/h, 4 ~ 125m lift. According to the working principle of titanium pump, also known as the sputtering ion pump. Titanium pump can be divided into diode andtriode, triode type may increase the argon (Ar) pumping speed. Structure of dipolartype titanium pumps as shown in the diagram, a lot of anode A thick 0.1~0.3mm,stainless steel cylinder components of 12~40mm diameter, the anode ends with Kthick 1~3mm titanium cathode. The cathode and anode tube axis perpendicular to the surface, plus 3~7KV voltage between the two, uniform axial magnetic field and anode tube of 1000~3000 Gauss.