초록 ▼

The invention relates to a gear pump which is suitable for delivering highly viscous materials. The aim of the invention is to provide a gear pump having a low-wear and low-maintenance bearing system, high output and good self-cleaning properties. For this purpose, the gear pump according to the inv

The invention relates to a gear pump which is suitable for delivering highly viscous materials. The aim of the invention is to provide a gear pump having a low-wear and low-maintenance bearing system, high output and good self-cleaning properties. For this purpose, the gear pump according to the invention comprises a housing, a gear section comprising a sun wheel and a plurality of stationarily mounted planet wheels, an input screw section comprising an input screw shaft linked with the sun wheel in a rotationally fixed manner and an input transfermix area, and an output screw section comprising an output screw shaft linked with the sun wheel in a rotationally fixed manner and an output transfermix area. The screw shafts, in the transfermix areas, have flight depths that decrease toward the gear section. In the housing, flights are configured which extend in an opposite direction relative to the screw shafts, which have increasing diameters towards the gear section and which end each between the planet wheels.

대표청구항 ▼

The invention claimed is: 1. Gear pump for highly viscous materials, comprising: a housing; a gear section having a sun wheel and several planet wheels disposed to be fixed at the housing; an input screw section having an input screw shaft, which is rotationally fixedly connected with the sun wheel

The invention claimed is: 1. Gear pump for highly viscous materials, comprising: a housing; a gear section having a sun wheel and several planet wheels disposed to be fixed at the housing; an input screw section having an input screw shaft, which is rotationally fixedly connected with the sun wheel, and having an input transfer mix area; and an output screw section having an output screw shaft, which is rotationally fixedly connected with the sun wheel, and having an output transfer mix area; wherein, in the input and output transfer mix areas, the input and output screw shafts have a flight depth decreasing toward the gear section, and, in the housing, flights are formed which extend in an opposite direction relative to the flights of the screw shafts, the flights having increasing diameters toward the gear section, and each of the flights ending between the planet wheels. 2. The gear pump according to claim 1, wherein the planet wheels are disposed in roller bearings in the housing. 3. The gear pump according to claim 2, wherein the housing has a first housing part accommodating the input screw shaft, a second housing part surrounding the planet wheels and the sun wheel, and a third housing part accommodating the output screw shaft. 4. The gear pump according to claim 3, wherein the roller bearings of the planet wheels are received in the first housing part accommodating the input screw shaft and in the third housing part accommodating the output screw shaft. 5. The gear pump according to claim 3, wherein the screw shafts are mutually connected in a rotationally fixed manner, and the sun wheel is fitted onto one of the screw shafts. 6. The gear pump according to claim 3, wherein the gear section has four planet wheels, and the housing has four flights respectively in the transfer mix areas. 7. The gear pump according to claim 2, wherein the screw shafts are mutually connected in a rotationally fixed manner, and the sun wheel is fitted onto one of the screw shafts. 8. The gear pump according to claim 2, wherein the gear section has four planet wheels, and the housing has four flights respectively in the transfer mix areas. 9. The gear pump according to claim 1, wherein the housing has a first housing part accommodating the input screw shaft, a second housing part surrounding the planet wheels and the sun wheel, and a third housing part accommodating the output screw shaft. 10. The gear pump according to claim 9, further comprising connection ducts constructed in the first housing part and/or in the third housing part, which connection ducts mutually connect the flights of the input transfer mix area and the flights of the output transfer mix area respectively. 11. The gear pump according to claim 10, wherein flights of the input transfer mix area are spaced in the circumferential direction with respect to the flights of the output transfer mix area. 12. The gear pump according to claim 1, wherein the screw shafts are mutually connected in a rotationally fixed manner, and the sun wheel is fitted onto one of the screw shafts. 13. The gear pump according to claim 1, wherein the flight depths of the screw shaft shafts disappear toward the gear section. 14. The gear pump according to claim 1, wherein the gear section has four planet wheels, and the housing has four flights respectively in the transfer mix areas. 15. The gear pump according to claim 14, wherein flights of the input transfer mix area are spaced in the circumferential direction with respect to the flights of the output transfer mix area. 16. The gear pump according to claim 1, wherein flights of the input transfer mix area are spaced in the circumferential direction with respect to the flights of the output transfer mix area.