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罗茨真空泵冷却装置
冷却装置
Cooling system
1、空气冷却：罗茨真空泵由于输送和压缩气体而产生热量，这些热量必须从转子传至壳体而散发。但在低压下，气体对热的传导和对流性能极差，致使转子吸收的热量不易散出，造成转子温度永远高于壳体的温度。由于转子的热膨胀，使转子与转子间、转子与泵壳间的间隙减少，特别在压差也高的情况下，尤为严重，甚至造成转子卡死，使泵损坏。为了使罗茨泵在较高的压差下工作，以扩大使用范围，增加泵的可靠性，就必须设法散出转子产生的热量，也就是说要对转子进行冷却。
1. Air cooling: Roots vacuum pump produces heat due to conveying and compressing gas, which must be transmitted from the rotor to the shell and emitted. However, under low pressure, the heat conduction and convection performance of the gas is very poor, which makes the heat absorbed by the rotor difficult to escape, and makes the temperature of the rotor always higher than that of the shell. Because of the thermal expansion of the rotor, the gap between the rotor and the rotor, between the rotor and the pump shell is reduced. Especially in the case of high pressure difference, it is particularly serious, and even causes the rotor to jam and damage the pump. In order to make Roots pump work at a higher pressure difference, to expand the scope of use and increase the reliability of the pump, it is necessary to try to dissipate the heat generated by the rotor, that is to say, to cool the rotor.
为了理解空气冷却的实质，先来看一下气体在罗茨真空泵排气一侧的流动情况，在罗茨真空泵中吸入气体被压缩的过程不是连续的，而是突然的。吸入气体随转子转动而被封闭于腔内，又随转子的旋转，使腔内的气体突然与排气口接通。由于排气一侧的气体压力较高，排气口处的气体就向腔中返冲，然后又随着转子的旋转而被驱赶排出泵外。这样的过程在每旋转一周中两个转子共进行四次排气过程。
In order to understand the essence of air cooling, first look at the flow of gas on the exhaust side of Roots vacuum pump. The process of inhaling gas compressed in Roots vacuum pump is not continuous, but sudden. Inhaled gas is closed in the cavity with the rotation of the rotor, and then with the rotation of the rotor, the gas in the cavity is suddenly connected to the exhaust port. Because the gas pressure on the exhaust side is high, the gas at the exhaust port rushes back into the cavity, and then is driven out of the pump with the rotation of the rotor. This process involves four exhaust cycles of two rotors in each rotating cycle.
Cooling system
1、空气冷却：罗茨真空泵由于输送和压缩气体而产生热量，这些热量必须从转子传至壳体而散发。但在低压下，气体对热的传导和对流性能极差，致使转子吸收的热量不易散出，造成转子温度永远高于壳体的温度。由于转子的热膨胀，使转子与转子间、转子与泵壳间的间隙减少，特别在压差也高的情况下，尤为严重，甚至造成转子卡死，使泵损坏。为了使罗茨泵在较高的压差下工作，以扩大使用范围，增加泵的可靠性，就必须设法散出转子产生的热量，也就是说要对转子进行冷却。
1. Air cooling: Roots vacuum pump produces heat due to conveying and compressing gas, which must be transmitted from the rotor to the shell and emitted. However, under low pressure, the heat conduction and convection performance of the gas is very poor, which makes the heat absorbed by the rotor difficult to escape, and makes the temperature of the rotor always higher than that of the shell. Because of the thermal expansion of the rotor, the gap between the rotor and the rotor, between the rotor and the pump shell is reduced. Especially in the case of high pressure difference, it is particularly serious, and even causes the rotor to jam and damage the pump. In order to make Roots pump work at a higher pressure difference, to expand the scope of use and increase the reliability of the pump, it is necessary to try to dissipate the heat generated by the rotor, that is to say, to cool the rotor.
为了理解空气冷却的实质，先来看一下气体在罗茨真空泵排气一侧的流动情况，在罗茨真空泵中吸入气体被压缩的过程不是连续的，而是突然的。吸入气体随转子转动而被封闭于腔内，又随转子的旋转，使腔内的气体突然与排气口接通。由于排气一侧的气体压力较高，排气口处的气体就向腔中返冲，然后又随着转子的旋转而被驱赶排出泵外。这样的过程在每旋转一周中两个转子共进行四次排气过程。
In order to understand the essence of air cooling, first look at the flow of gas on the exhaust side of Roots vacuum pump. The process of inhaling gas compressed in Roots vacuum pump is not continuous, but sudden. Inhaled gas is closed in the cavity with the rotation of the rotor, and then with the rotation of the rotor, the gas in the cavity is suddenly connected to the exhaust port. Because the gas pressure on the exhaust side is high, the gas at the exhaust port rushes back into the cavity, and then is driven out of the pump with the rotation of the rotor. This process involves four exhaust cycles of two rotors in each rotating cycle.
