Supply system of a sealing system of a turbomachine and turbomachine having a sealing and supply system
A supply system of a sealing system of a turbomachine, wherein the sealing system which are suppliable with a seal gas. The supply system comprises, for each sealing sub-system, four seal gas lines: a first seal gas supply line, via which process gas extracted from the turbomachine is suppliable as first seal gas to the respective sealing sub-system. A second seal gas supply line, via which second seal gas is suppliable to the respective sealing sub-system. A seal gas discharge line, via which the first seal gas and the second seal gas are dischargeable from the respective sealing sub-systems. A safety discharge line, which is closed during the normal operation and open in the event of a fault, to discharge at least one part of the first seal gas and of the second seal gas from the respective sealing sub-system via the same in the event of a fault.
1. A supply system of a sealing system of a turbomachine, wherein the sealing system comprises at least two sealing sub-systems configured to seal a rotor of the turbomachine relative to a stator of the turbomachine, wherein each of the at least two sealing sub-systems comprises multiple seals, configured to be supplied with a seal gas, wherein the supply system for each of the at least two sealing sub-systems exclusively comprises four seal gas lines:
a first seal gas supply line configured to supply process gas extracted from the turbomachine as a first seal gas to a respective sealing sub-system;
a second seal gas supply line configured to supply a second seal gas to the respective sealing sub-system;
a seal gas discharge line configured to be dischargeable from the respective sealing sub-system the first seal gas and the second seal gas; and
a safety discharge line, which is closed during normal operation and open in a fault and configured to discharge at least one part of the first seal gas and of the second seal gas from the respective sealing sub-system.
2. The sealing system according to claim 1 , further comprising:
a differential pressure measurement system configured to measure a differential pressure between a pressure in the safety discharge line and a pressure in the second seal gas supply line.
3. The sealing system according to claim 2 , wherein a differential pressure sensor of the differential pressure measurement system is coupled with a measurement point to the safety discharge line and with a measurement point to the second seal gas supply line.
4. The sealing system according to claim 1 , further comprising at least one of:
a pressure regulating valve integrated in the second seal gas supply line between a seal gas source and a mouth to the respective sealing sub-system and
a filter integrated in the second seal gas supply line between the seal gas source and the mouth to the respective sealing sub-system.
5. The sealing system according to claim 1 , further comprising one of:
a bursting disc integrated in the seal gas discharge line and configured to burst in an overpressure event and
a safety valve integrated in the seal gas discharge line.
6. The sealing system according to claim 1 , further comprising one of:
a bursting disc integrated in the safety discharge line and configured to burst in an overpressure event and
a safety valve integrated in the safety discharge line.
7. The sealing system according to claim 1 , wherein the second seal gas is nitrogen.