| 摘要 |
<p>A vacuum pump, which in particular is a vane-type rotary pump or a screw-type pump, comprises a compression chamber (20). The compression chamber (20) is provided with a chamber inlet (22) and a chamber outlet (26). Furthermore, the compression chamber (20) is connected to a gas ballast inlet (32). In order to ensure consistent gas flow through the gas ballast inlet (32) when the pressures within the compression chamber (20) vary, the gas ballast inlet (32) is connected to a gas ballast chamber (36). Gas is stored under pressure in the gas ballast chamber (36). The pressure is higher than the atmospheric pressure and/or higher than the pressure in the compression chamber (20). Thus, excess heating of the vacuum pump can be prevented.</p> |
