Rotary vane vacuum pump application in the brazing what -

rotary vane vacuum pump, used for soldering. Brazing is one of the first to use human material connection method. Before humans began to use iron, invented the brazing to connect to the metal. Brazing were used in the machinery, motor, instrument, and radio etc, has been widely used. Rotary vane vacuum pump can completely meet the application requirement of brazing process, also can provide soldering applications with a full set of high vacuum products. This paper wants to explain to you rotary-vane vacuum pump application in soldering, and vacuum brazing of knowledge content.

brazing refers to the ratio of the low melting point of welding pieces of the solder and solder and heated to melting temperature of solder and solid workpiece gap welding method. Filled with liquid brazing materials to form metallic connection.

the application characteristics of brazing

brazing temperature is lower, sub smooth level off, the organization and mechanical properties change little, small deformation, workpiece size accurately.

can can be the same or different materials, metal welding no restrictions to the thickness of the workpiece is poor.

( 3) Some brazing method can welding multiple weldment and joint at the same time, the productivity is high.

simple brazing equipment is simple, the production investment cost is low.

5] low joint strength, heat resistance is poor, the strict welding dressing, solder is expensive.

vacuum brazing refers to the workpiece heated in vacuum chamber, it is mainly used for welding of high quality products and oxidative materials. Vacuum brazing furnace includes a cylindrical pressure vessel wall and door. The size and location of the door is designed to one end of the closed cylindrical wall. Workpiece processing system installed in the pressure vessel on the door, to support the metal artifacts, for heat treatment and brazing. Workpiece processing system includes a rotating workpiece during processing device. Vacuum system can be connected to the workpiece, so that the pressure inside the workpiece in the process of soldering under atmospheric pressure.

rotary-vane vacuum pump are the characteristics of the

1, the design characteristics of

( 1) Rotary-vane vacuum pump are the overall design of the

rotary vane pump motor and pump adopts the integration of design, more compact and portable.

( 2) The appearance of the rotary-vane vacuum pump design

the motor of the vacuum pump shell is made from aluminum alloy. Aluminum alloy high cooling efficiency, ensure the normal operation of long time continuous, good appearance.

( 3) The interior design of rotary vane vacuum pumps

rotary vane pump fuel tank for the middle layer, at the same time, the oil and gas separation device in the exhaust gas, without oil, reduces the pollution of oil mist.

( 4) Rotary vane vacuum water pump oil return design

in order to avoid vacuum pump oil return, rotary vane pump in the oil inlet is designed and can prevent the backflow pump stopped pumping, pollution emptying devices and pipeline.

2, performance characteristics,

( 1) Rotary vane vacuum pump in a wide range of pressure can be large pumping speed.

( 2) Rotary vane vacuum pump rotor with good geometrical symmetry, in the working process of the pump running relatively smoothly.

( 3) In the structure of the rotary vane pump design, rotor, and between the gaps between the rotor and shell, wear small; At the same time, reduces the driving power to realize high speed running.

( 4) Rotary vane pump cavity does not need oil seal and lubrication, and can reduce the pollution of oil steam vacuum system.

because the rotary-vane vacuum pump has the above characteristics, so suitable for vacuum distillation, vacuum drying, vacuum impregnating, the vacuum sintering, vacuum insulation, vacuum brazing, vacuum coating and vacuum heat treatment process.

compared with vacuum brazing welding method, rotary vane vacuum pump application in the brazing has the following advantages:

1) Vacuum brazing temperature is low, small influence on the structure and properties of parent metal;

2) Vacuum brazing brazing welding head is smooth and beautiful, beautiful appearance;

3) Vacuum brazing welding deformation is small, especially by uniform heating brazing method ( Like in the brazing vacuum brazing furnace, , the welding deformation can be reduced to a minimum, and the size of the weldment precision to ensure easy;

4) Some brazing method can be a dozens or hundreds of brazing seam welding, high productivity;

5) Vacuum brazing can realize the dissimilar metal or alloy, metal and nonmetal.

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