2 bv vacuum pump water temperature, oil return, knowledge - pump head structure

2 bv vacuum pump pump head structure knowledge

1, 2, bv vacuum pump pump shell for double shell structure. Outer layer is a metal pump shell ( Before and after pump shell) , inner shell can be made from high chromium alloy cast iron ( Including the spiral case, a former shield, shield) after , also can be made from rubber ( Including former volute, after shield) Volute) 。

2, 2 bv vacuum pump impeller blade, blade, after of front cover and back cover. Leaves are twisted leaves, usually 3 - 6.

3, 2 bv vacuum pump shaft components: auxiliary impeller including packing seal, three types of packing seal and mechanical seal.

the first introduce 2 bv the pump head structure of vacuum pump. Understand relevant knowledge helps to effective use of equipment. The more related knowledge, please also pay attention to us.

2 bv vacuum pump oil return problem:

1, 2, bv vacuum pump oil pump with larger molecular weight.

2, in order to reduce the limit pressure of equipment for vacuum unit oil has a lower saturated vapor pressure at room temperature.

3, in order to make the equipment can work under high pressure, require 2 bv vacuum pump oil under the boiling temperature of saturated vapor pressure should be as large as possible.

4, 2 bv vacuum water pump oil has good thermal stability. Contact with the atmosphere, will not change the performance of the oil by oxidation. Low freezing point and viscosity at low temperature. As you can see, 2 bv vacuum pump oil's influence on the ultimate pressure is bigger. In with the same structure of vacuum unit, vacuum system of pumping the partial pressure of the gas will change according to the oil pump. Pay attention to when you add oil pump.

2 bv vacuum water pump water temperature performance usually use 2 bv vacuum pump. Normally, the performance curve is under 15 ° C temperature measurement. Therefore, when actual choice 2 bv vacuum pump, should correct the extraction rate of vacuum pump. Let's take a closer look.

2 bv on the actual speed of vacuum pump can be based on the Qt = Q15K, K = ( P1 - Pt) /( P1 - P15) To calculate, among them:

1, the water temperature for t ° C in Qt airflow m3 / min when the water temperature is 15 ° C Q15 airflow m3 / min

2, 2 bv vacuum pump suction pressure mmHg when the water temperature is t ° C, Pt saturated steam pressure mmHg.

3, when the water temperature of 15 ℃, P15 saturated vapor pressure mmHg K - Air volume correction coefficient. When using 2 bv vacuum pump, usually should not only pay attention to the parts, but also show its use in the process of timely, so that you can use for a long time.

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