| 罗茨真空泵特性指标及测试方法研究 |
| 添加时间：2019/1/24 14:24:59 浏览次数： |
Research on the Characteristic Index and Testing Method of Roots Vacuum Pump 在最大容许压差测量时泵温很高，因为气体的压缩主要在出口处，所以泵出口处温度高达130℃~160 ℃，而出口处的气流温度更高，可达240 ℃ ~260 ℃，由于出口处泵体和转子都处于高温状态下，温差虽达100 ℃左右，但也一般不会发生碰擦，当然这是必须保证泵的间隙处在正常情况下；而泵进口处温度一般只有40 ℃~50 ℃，故进、出口处温差高达200 ℃以上，因此该处与高温转子容易发生碰擦，甚至卡住，故而转子中心应相对于泵缸中心适当下移，以增大该处间隙，保证高压差运转的安全性和可靠性。 In the maximum allowable differential pressure measurement, the pump temperature is very high, because the gas compression is mainly at the outlet, so the temperature at the outlet of the pump is as high as 130 ~160 ~C, and the air temperature at the outlet is higher, up to 240 ~260 ~C. Because the outlet of the pump body and rotor are in a high temperature state, although the temperature difference is about 100 ~C, it generally does not occur rubbing, of course, this is necessary to ensure the gap of the pump. Under normal conditions, the temperature at the inlet of the pump is only 40-50 degrees C, hsmenchuang.89ix.com hsyanglao.89ix.com hsfangshui.89ix.com hstuozhan.75ix.com hszidongmen.75ix.com hsshangbiao.75ix.com so the temperature difference between the inlet and outlet is over 200 degrees C. Therefore, it is easy to rub against the high-temperature rotor, or even get stuck. Therefore, the center of the rotor should be properly moved down relative to the center of the pump cylinder to increase the clearance and ensure the safety and reliability of the operation of the high-pressure differential. 在最大容许压差测量时应同时记录室温，泵进、出口处温度，运转时间和消耗功率。不同泵之间消耗功率受诸多因素影响，并不一致，如见超常必须立即检查、解决。如常用的梅花形联轴器就是其中之一，通常梅花形弹性块材质采用聚胺脂，它的质地较硬，所以对联轴器体的梅花形孔的分度要求较高，如加工中偏差较大，弹性块与联轴器体之间将产生过度挤压，使消耗功率异常，一般联轴器表面温度不高，如出现联轴器发烫，就可确定是上述原因；再如泵的二个侧盖上转子轴孔距离偏差过大，转子轴强度不足至使工作时挠度过大等原因，使轴承转角超过容许限度，产生超常摩擦，也将使消耗功率异常；此外齿轮中心距偏小，齿形偏胖等也将造成齿轮之间严重挤压，导致消耗功率增大。 The room temperature, the temperature at the inlet and outlet of the pump, the running time and the power consumption should be recorded simultaneously when the maximum allowable pressure difference is measured. The power consumption between different pumps is affected by many factors and is not consistent. If it is unusual, it must be checked and solved immediately. For example, the commonly used plum-shaped coupling is one of them. Usually, the plum-shaped elastic block is made of polyurethane resin. Its texture is hard, so it requires a higher dividing of the plum-shaped hole in the coupling body. For example, the deviation in processing is large, the excessive extrusion between the elastic block and the coupling body will result in abnormal power consumption. Generally, the surface temperature of the coupling is not high, such as the hot of the coupling. It can be ascertained that the above-mentioned reasons are the above-mentioned reasons; furthermore, if the distance deviation of the rotor shaft holes on the two side covers of the pump is too large, the strength of the rotor shaft is insufficient to make the working deflection too large, so that the bearing angle exceeds the allowable limit, resulting in abnormal friction, which will also cause abnormal power consumption; in addition, the smaller the center distance of the gear and the bigger tooth profile will also cause serious squeezing between the gears, resulting in increased power consumption. |
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