초록 ▼

In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a direction along a longitudinal axis of the

In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a direction along a longitudinal axis of the feed screw to enhance consistency in material flow through the cartridge. The feed screw is preferably driven by a closed-loop servo motor to achieve high-performance dispensing resolution. The assembly is preferably compatible with fixed-z and floating-z cartridges.

대표청구항 ▼

In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a direction along a longitudinal axis of the

In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a direction along a longitudinal axis of the feed screw to enhance consistency in material flow through the cartridge. The feed screw is preferably driven by a closed-loop servo motor to achieve high-performance dispensing resolution. The assembly is preferably compatible with fixed-z and floating-z cartridges. er surface of the outer rim further comprises the step of machining a rim to produce a rim surface having a shape including a compound radius. 7. A method in accordance with claim 1 wherein said step of providing an outer surface of the outer rim further comprises the step of securing the blades to the rim by fillet welds or friction welds to produce a rim surface having a shape including a compound radius. 8. A method in accordance with claim 1 wherein the outer rim includes an inner surface, said method comprising the step of: providing an inner surface of the outer rim with a shape that defines at least one apex within the outer rim, and that reduces circumferential rim stress concentration between each of the blades and the rim. 9. A gas turbine engine rotor assembly comprising a rotor comprising a radially outer rim, a radially inner hub, and a web extending therebetween, a plurality of circumferentially spaced apart rotor blades extending radially outwardly from said rim, an outer surface of said outer rim having a shape including a compound radius which defines at least one apex within said outer rim outer surface, and which reduces circumferential rim stress concentration between each of said blades and said rim. 10. A gas turbine engine rotor assembly in accordance with claim 9 wherein said outer rim surface has a circumferentially concave shape between adjacent blades. 11. A gas turbine engine in accordance with claim 9 wherein said rotor comprises a plurality of blisks. 12. A gas turbine engine in accordance with claim 9 wherein said outer rim shape directs air flow away from an interface between each of said blades and said rim. 13. A gas turbine engine in accordance with claim 9 wherein said outer surface of said outer rim comprises a compound radius. 14. A gas turbine engine in accordance with claim 13 wherein said compound radius comprises a first radius and a second radius, said first radius is between approximately 0.04 inches and 0.5 inches. 15. A gas turbine engine in accordance with claim 13 wherein said second radius is approximately 2 to 10 times a distance between said circumferentially spaced apart rotor blades. 16. A gas turbine engine rotor assembly comprising a first rotor and a second rotor, said first rotor coupled to said second rotor, at least one of said rotor comprising a radially outer rim, a radially inner hub, and a web extending therebetween, a plurality of circumferentially spaced apart rotor blades extending radially outwardly from said rim, an outer surface of said outer rim comprising a compound radius which reduces circumferential rim stress concentration between each of said blades and said rim. 17. A gas turbine engine rotor assembly in accordance with claim 16 wherein said outer rim surface of said one rotor has a concave shape between adjacent blades. 18. A gas turbine engine in accordance with claim 16 wherein said at least one of said rotor comprises a plurality of blisks. 19. A gas turbine engine in accordance with claim 16 wherein said outer surface of said outer rim comprises a first radius and a second radius. 20. A gas turbine engine in accordance with claim 19 wherein said first radius is between approximately 0.04 inches and 0.5 inches, said second radius is approximately 2 to 10 times a distance between said circumferentially spaced apart rotor blades.