GEARED TURBOMACHINE

Abstract

A geared turbomachine has a transmission housing with a upper part and a lower part joined to the upper part along a main joint extending at least in sections perpendicular to a vertical direction. A main gear is in the transmission housing and a first pinion cover is connected to the upper part along a first pinion joint consisting of a first horizontal section extending perpendicular to the vertical direction and a first vertical section extending from the first horizontal section at a first angle. A first pinion shaft has a first shaft body in the first pinion joint and in the transmission housing and carries a first pinion meshing with the main gear. A first turboimpeller is fixed to the first shaft body.

Claims

1. A geared turbomachine comprising a transmission housing having an upper part and a lower part joined to the upper part along a main joint extending at least in sections perpendicular to a vertical direction; a main gear received in the transmission housing; a first pinion cover connected to the upper part along a first pinion joint consisting of a first horizontal section extending perpendicular to the vertical direction and a first vertical section extending from the first horizontal section at a first angle; a first pinion shaft having a first shaft body in the first pinion joint and in the transmission housing; a first pinion on the first pinion shaft and meshing with the main gear; and a first turboimpeller fixed to the first shaft body.

2. The geared turbomachine according to claim 1, wherein the first vertical section runs perpendicular to a first normal direction.

3. The geared turbomachine according to claim 1, wherein the first angle is less than or equal to 90E.

4. The geared turbomachine according to claim 1, further comprising: a second pinion shaft having a second shaft body, carrying a second pinion meshing with the main gear in the transmission housing, and connected to the second shaft body, and a second turboimpeller connected to the second shaft body.

5. The geared turbomachine according to claim 4, further comprising: a second pinion cover joined to the upper part along a second pinion joint on which lies the second pinion shaft that has a second horizontal section extending perpendicular to the vertical direction and a second vertical section extending from the second horizontal section at a second angle.

6. The geared turbomachine according to claim 5, wherein the second vertical section is perpendicular to a second normal direction.

7. The geared turbomachine according to claim 5, wherein the first angle and the second angle are of equal size.

8. The geared turbomachine according to claim 4, wherein the pinion shafts each have a respective shaft body, the respective pinions meshing with the main gear being in the transmission housing and fixed on the respective shaft bodies, the turbomachine further comprises: respective turboimpellers connected to each of the shaft bodies, each of the pinion shafts being either in the main joint or in the respective pinion joint where the respective pinion cover is connected to the upper part.

9. The geared turbomachine according to claim 8, wherein each pinion joint consists of a horizontal section extending perpendicular to the vertical direction and a vertical section extending from the horizontal section at an angle.

10. The geared turbomachine according to claim 9, wherein the pivot joints are all L-shaped and their angles all the same.

11. The geared turbomachine according to claim 8, wherein each pinion shaft is in a respective pinion joint.

12. The geared turbomachine according to claim 8 wherein all the shafts are rotatable about respective axes parallel to each other and to a rotation axis of the main gear.

13. The geared turbomachine according to claim 1, wherein the main gear is mounted on the transmission housing rotatable about a main-gear axis offset upward with from the main joint.

14. The geared turbomachine according to claim 1, wherein the first turboimpeller is accommodated in a respective first impeller housing attached to the transmission housing or formed integrally with the transmission housing.

15. The geared turbomachine according to claim 13, wherein the first transmission housing is divided along the first pinion joint.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0035] The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:

[0036] FIG. 1 is a side view of a geared turbomachine according to the invention, and

[0037] FIG. 2 is a top sectional view through three vertically offset planes of the geared turbomachine without the covers of the transmission housing.

SPECIFIC DESCRIPTION OF THE INVENTION

[0038] FIGS. 1 and 2 show a geared turbomachine 1 according to the invention with a transmission housing 2 in which a large-diameter main gear 3 is rotatable about an axis x. The transmission housing 2 has an upper part 4a and a lower part 4b fitted together at a planar main joint 5. The main joint 5 extends thereby wholly in a horizontal plane H extending perpendicular to a vertical direction z.

[0039] FIG. 2 is a three level section through the geared turbomachine 1 in a top view at and above the plane H. One can here see that the geared turbomachine 1 further comprises a first pinion shaft 6 having a first shaft body 6a and a first pinion 6b meshing with the main gear 3 in the transmission housing 2. Furthermore, the first pinion shaft 6 carries a first turboimpeller 6c fixed on one outer end of the first shaft body. The first turboimpeller is in a first impeller housing 7 and forms together with it together a first stage I.

[0040] In the illustrated embodiment the geared turbomachine 1 is designed as a geared compressor and the first compressor stage I that draws in a process fluid through a first intake 7a and compresses and ejects it through a first output 7b at an increased pressure. This first turboimpeller 6c is outside the housing at one outer end of the first shaft body 6a.

[0041] A pinion cover 8 sits on the housing part 4a atop the first pinion shaft 6 at a first joint 9. The first pinion shaft 6 is held in the first pinion joint 9 such that, after removal of the first pinion cover 8 from the upper part 4a, the first pinion shaft 6 can be lifted off the upper part 4a of the transmission housing 2.

[0042] According to the invention, the first pinion joint 9 is L-shaped and has a first horizontal section 9a extending perpendicular to the vertical direction z and a first vertical section 9b extending at a first angle ? to the first horizontal section 9a. The first pinion joint 9 extends annularly continuously from one edge of the transmission housing 2 to the other and forms a continuous interface between the first pinion cover 8 and the upper part 4a. This interface is annularly sealed except at an unillustrated shaft feedthrough for the first shaft body 6a, in order to seal the interior of the transmission housing 2 from the surrounding environment. This prevents in particular leakage of lubricant (for example oil) for the main gear 3 and the pinions meshing with it. The first shaft body 6a of the first pinion shaft 6 extends out of the transmission housing 2, so that the first turboimpeller 6c is mounted outside the transmission housing 2.

[0043] In the illustrated embodiment, not only does the first horizontal section 9a extend in a plane perpendicular to the vertical direction z but also to the first vertical section 9b. This latter section extends in a first vertical plane v.sub.1 extending perpendicular to a first normal direction n.sub.1. Here the vertical direction z and the first normal direction n.sub.1 form a first angle ? of 90E in the illustrated embodiment. Thus the first pinion joint 9 is of a right-angle L-shape and lies between the upper part 4a of the transmission housing 2 and the first pinion cover 8.

[0044] The first turboimpeller 6c forming the first stage I is outside the housing on an outer end of the shaft body 6a. Another first turboimpeller 10a forming a second stage I is carried on the opposite outer shaft end in a respective impeller housing 11a.

[0045] The inventive concept of the wedge-shaped pinion cover can be extended. Thus in the illustrated embodiment a second pinion shaft 12 with a second shaft body 12a carrying a second pinion 12b meshing with the main gear 3 is in the transmission housing 2 and has at least one second turboimpeller 12c carried on the second shaft body 12a and forming a second turbostage II. The second turboimpeller 12c is in a second impeller housing 13 secured directly to the transmission housing 2 and in which a process fluid is conveyed and compressed between an intake 13a and an output 13b. The combination of the second turboimpeller 12c and the second impeller housing 13 forms the second stage II (compressor stage).

[0046] As can also be seen from FIG. 1, a part of the transmission housing 2 is formed by a second pinion cover 14 at a second pinion joint 15 on the upper part 4a. Here the second pinion shaft 12 is in the second pinion joint 15. The second pinion joint 15 consists of a second horizontal section 15a extending perpendicular to the vertical direction z and an adjoining second vertical section extending at a second angle ? to the first vertical section 15a. In the illustrated embodiment, the second angle ? is approximately 90E and is therefore the same as the first angle ?.

[0047] The second vertical section 15b extends perpendicular to a second normal direction n.sub.2 and in a second vertical plane v.sub.2. Both the first normal direction n.sub.1 and the second normal direction n.sub.2 are in each case perpendicular to a main gear axis x or to the parallel axes of rotation of the pinion shafts 6 and 12.

[0048] In addition to the first pinion shaft 6 covered by the first pinion cover 8 and the second pinion shaft 12 covered by the second pinion cover 14 the geared turbomachine 1 according to the invention also has a third pinion shaft 16 with a third shaft body 16a in the illustrated embodiment, carrying a third pinion 16b and connected to the third shaft body 16 to form a third turboimpeller 16c. Likewise a fourth pinion shaft 17 with a fourth shaft body 17a, a fourth pinion 17b meshing with the main gear 3 and a fourth turboimpeller 17c formed are provided.

[0049] Both the third pinion shaft 16 and the fourth pinion shaft 17 horizontally flank the main gear 3 and lie in the main joint 5. Each of the pinion shafts 6, 12, 16, 17 is either in a respective pinion joint 9, 15 or in the main joint 5. Here each of the pinion joints 9 and 15 holds exactly one respective pinion shaft 6, 12.

[0050] Furthermore, FIG. 2 shows that the second, third, and fourth turboimpeller 12, 16, and 17 are on the respective second, third and fourth pinion shafts 10b, 10c, and 10d and outside the housing 2 and held in respective further impeller housings 11b, 11c, 11d to form respective turbostages II, III, and IV. Similarly the shafts 6, 12, 16, and 17 form opposite turbostages II, II, III, and IV.