Dosing system having a piezoceramic actuator
The invention relates to a metering system (1) for a metering substance, comprising a nozzle (40), a feed channel (44) for the metering substance, a discharge element (31), and a piezo actuator (61) which is coupled to the discharge element (31) and/or the nozzle (40). The piezo actuator (61) of the metering system (1) is hermetically encapsulated in a housing (62).
1. A metering system for a metering substance, comprising
a nozzle,
a feed channel for a metering substance,
a discharge element, and
a piezo actuator coupled to the discharge element and/or the nozzle, wherein
the piezo actuator is hermetically encapsulated in a housing by being arranged entirely between a housing base and a housing lid along an entire longitudinal extension of the piezo actuator.
2. The metering system according to claim 1 , wherein
the housing is designed to be vibration fatigue-resistant.
3. The metering system according to claim 1 , wherein
at least one temperature sensor is arranged inside the housing and/or on an outer side of the housing.
4. The metering system according to claim 3 , wherein
at least one temperature sensor is arranged on an outer side of the piezo actuator and/or inside the piezo actuator.
5. The metering system according to claim 3 , wherein at least one temperature sensor is located on an inner wall of the housing.
6. The metering system according to claim 1 , wherein
at least one strain gauge is arranged inside the housing and/or on an outer side of the housing.
7. The metering system according to claim 1 , wherein
the housing comprises at least one feed-through for a number of electrical conductors.
8. The metering system according to claim 1 , wherein
a thermally conducting medium and/or a medium for moisture suppression are located in the housing.
9. The metering system according to claim 1 , wherein
a pressure compensation zone is located in the housing.
10. The metering system according to claim 1 , wherein
the housing comprises a heat dissipation zone.
11. The metering system according to claim 10 , further comprising
a cooling device that uses a coolant which comprises a gaseous and/or liquid medium.
12. The metering system according to claim 10 , further comprising
a cooling device that is designed in such a way that mechanical abrasion debris is removed from an actuator chamber of the metering system by the coolant.
13. A method of using the piezoceramic actuator hermetically encapsulated in the metering system for metering the metering substance according to claim 1 .
14. A method for operating the metering system for metering the metering substance according to claim 1 , the metering system including the piezo actuator hermetically encapsulated in the housing.
15. A method for producing a metering system for metering a metering substance, the metering system including a piezo actuator, wherein
the piezo actuator is hermetically encapsulated in a housing, and
the housing of the piezo actuator is arranged in a housing of the metering system.
16. The metering system according to claim 10 , wherein
the heat dissipation zone is coupled to a cooling device of the metering system.
17. The method for producing the metering system for metering a metering substance according to claim 15 , wherein
the piezo actuator is hermetically encapsulated in the housing by being arranged entirely between a housing base and a housing lid along an entire longitudinal extension of the piezo actuator.
18. The method for operating the metering system for metering the metering substance according to claim 14 , further comprising
regulating, as a function of at least one operating parameter of the encapsulated piezo actuator, the operation of the metering system.