Stepped parting joint on a transmission housing of a fluid machine

Abstract

A divisible housing of a fluid machine for a transmission to be received in the divisible housing is provided. The transmission provided for receiving in the divisible housing includes a large wheel and at least two pinion shafts which are in engagement with the large wheel. The divisible housing includes a first housing element and a second housing element which is connected to the first housing element via a parting joint. The at least two pinion shafts may be received in the parting joint. The parting joint includes a parting joint step, the at least two pinion shafts being receivable in the parting joint on both sides of the parting joint step.

Claims

1. A divisible housing of a fluid machine for a transmission receivable in the divisible housing and having a large wheel and at least two pinion shafts which are in engagement with the large wheel, the divisible housing comprising: a first housing element; and a second housing element connected to the first housing element via a single continuous parting joint, wherein the at least two pinion shafts being receivable in the parting joint, wherein the parting joint includes a parting joint jump, which forms two different horizontal levels in the parting joint, wherein the parting joint provides a continuous mating of the first housing element and the second housing element wherein the at least two pinion shafts are receivable in the parting joint on both sides of the parting joint jump at the two different horizontal levels, and wherein the at least two different horizontal levels each lie at different vertical heights from one another.

2. The divisible housing of a fluid machine as claimed in claim 1, wherein the first housing element and the second housing element each include a step corresponding to one another and forming the parting joint jump.

3. The divisible housing of a fluid machine as claimed in claim 2, wherein the first housing element and the second housing element are a top box and a parting joint cover, respectfully, of the transmission housing, or wherein the first housing element and the second housing element are aligned or centered with one another via a plurality of step faces, offset vertically to one another, of the step forming the parting joint jump.

4. The divisible housing of a fluid machine as claimed in claim 1, wherein the transmission is received in the divisible housing, the at least two pinion shafts being received in the parting joint on both sides of the parting joint jump.

5. The divisible housing of a fluid machine as claimed in claim 4, wherein one axis of rotation of two axes of rotation of the at least two pinion shafts is arranged above an axis of rotation of the large wheel in the divisible housing.

6. The divisible housing of a fluid machine as claimed in claim 1, wherein the first housing element and the second housing element are pinned to one another and screwed to one another.

7. The divisible housing of a fluid machine as claimed in claim 1, wherein the first housing element and the second housing element are pinned to one another or screwed to one another.

8. The divisible housing of a fluid machine as claimed in claim 1, wherein the divisible housing further includes a third housing element which is connected to the first housing element or to the second housing element via a further parting joint.

9. The divisible housing of a fluid machine as claimed in claim 8, wherein the transmission includes at least two further pinion shafts which are in engagement with the large wheel or with a further large wheel, and wherein the large wheel or the further large wheel and the at least two further pinion shafts being arranged in the further parting joint.

10. The divisible housing of a fluid machine as claimed in claim 1, wherein the first housing element and the second housing element are a top box and a parting joint cover, respectfully, of the transmission housing, and wherein the first housing element and the second housing element are aligned and centered with one another via a plurality of step faces, offset vertically to one another, of a step forming the parting joint jump.

11. The divisible housing of a fluid machine as claimed in claim 1, wherein the parting joint is sealed off, using a sealing lens arranged over the parting joint jump.

12. The divisible housing of a fluid machine as claimed in claim 1, wherein the transmission is a transmission of a turbine, turbocompressor, multistage transmission compressor or pump.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) An exemplary embodiment of the invention is illustrated in figures which are explained in more detail below and in which:

(2) FIG. 1A and FIG. 1B show two views of a divided housing, having a cover and a top box, for a transmission of a multistage transmission compressor;

(3) FIG. 2 shows a view of a section along a sectional line, designated by H-H, in FIG. 1A;

(4) FIG. 3 shows a view of a section along a sectional line, designated by J-J, in FIG. 1A;

(5) FIG. 4 shows a three-dimensional illustration of the divided housing for a transmission of a multistage transmission compressor according to FIGS. 1A and 1B.

(6) Exemplary embodiment: stepped parting joint on a divided transmission housing for a transmission of a multistage transmission compressor.

DETAILED DESCRIPTION OF INVENTION

(7) FIGS. 1A and 1B (front and side view) and also FIG. 3 (3D view) show views, a top box 2 and a cover 3, of a divided housing 1 (transmission housing) for a transmission 100 of a multistage transmission compressor intended for air separation.

(8) The divided housing 1 has the illustrated cover 3 and the illustrated top box 2 and also a bottom box 6 (not illustrated), all preferably made from steel. The cover 3 and top box 2 are connected to one another via a first, stepped parting joint 4; the top box 2 and bottom box 6 are connected to one another via a second, horizontal and nonstepped parting joint 7.

(9) The multistage transmission compressor is composed of eight (compressor) stages which are implemented via a transmission 100 received in the divided housing 1 and having four pinion shafts 10, 11, 20, 21 of the transmission 101 which are in engagement with a large wheel 101 of the transmission 100. At the free ends of the four pinion shafts 10, 11, 20, 21 are arranged turboimpellors which are received in spiral housings (flow-routing components) arranged on the outside with respect to the transmission housing 1.

(10) All four pinion shafts 10, 11, 20, 21 are arranged around the large wheel 101 and are in engagement with the large wheel 101 via toothings. In this case, the first pinion shaft 10 and second pinion shaft 11 (stages 5 to 8) are arranged above the large wheel 101; the third pinion shaft 20 and fourth pinion shaft 21 (stages 1 to 4) are arranged level with the large wheel 101. In order to allow the efficient engagement of the pinion shafts 10, 11, 20, 21, the pinion shafts 10, 11, 20, 21 are arranged, with regard to their distance from the large wheel 101, in such a way that the reference circles of the pinion shafts 10, 11, 20, 21 in each case touch the reference circle of the large wheel 101.

(11) The drive of the large wheel 101 or of the shaft of the large wheel 101 takes place via an electric motor. The compressor stages are sealed off with respect to the transmission housing 1 by means of Kohler rings.

(12) As FIGS. 1A and 1B and also FIG. 3 show, the top box 2 has on its underside, which together with the top side of the bottom box 6 forms the second, unstepped and horizontal parting joint 7, the receptacles, that is to say the shaft seats, for the shaft of the large wheel 101 and for the third pinion shaft 20 and fourth pinion shaft 21. All three shafts 20, 21, (101) lie in this case in one horizontal plane in accordance with the second, unstepped and horizontal parting joint 7.

(13) As FIGS. 1A and 1B and also FIG. 3 also show, the top box 2 has on its top side, which together with the underside of the cover 3 forms the first, stepped parting joint 4, the receptacles, that is to say the shaft seats, for the first pinion shaft 10 and second pinion shaft 11. The corresponding receptacles for the first pinion shaft 10 and second pinion shaft 11 are also provided in the underside of the cover 3.

(14) The first, stepped parting joint 4 has a jump point 5 arranged approximately in the middle of the housing 1 with respect to the longitudinal extent of the housing 1 and having approximately a height of about 60 mm. This jump point 5 is formed by corresponding steps 8 both in the top box 2 of the housing 1 and, correspondingly, in the cover 3 of the housing 1.

(15) As a result, the first pinion shaft 10 and second pinion shaft 11 lie above the large wheel 101 and together in the first, stepped parting joint 4, this being beneficial for mounting and cost reasons. However, the first pinion shaft 10 and second pinion shaft 11 no longer lie in the same horizontal plane, but instead, correspondingly to the step 8 formed, in different horizontal planes 12, 13 or at different heights.

(16) The reference circles of the first pinion shaft 10 and second pinion shaft 11 and of the large wheel 101 still touch one another.

(17) In order to make it possible to align the top box 2 and cover 3, the vertical step faces 9 are offset with respect to one another. The top box 2 and cover 3 are pinned 33 by means of centering pins and screwed 32. The bottom box and top box are also pinned 33 and screwed 32 together.

(18) Sealing off of the stepped parting joint 4 by means of a sealing lens 30 with an O-ring 31.

(19) The lubrication of the transmission 100 arranged in the housing 1 is carried out by oil sump lubrication, the oil seal of the first, stepped parting joint 4, in particular of the parting joint jump 5 located there or of the steps 6 in the top box 2 and cover 3, assuming central importance.

(20) The transmission housing 1 provides for the use of a sealing lens 30 for this purpose, as shown in FIGS. 2 and 3 in detail or in sections (H-H, J-J).

(21) Said sealing lens 30 is screwed 32, countersunk, over the parting joint step 5 from outside. The sealing action is achieved via an inserted O-ring 31.

(22) The production of the countersunk lens seat on the transmission housing 1 is carried out during the spindling out of the bearing seats of the first pinion shaft 10 and second pinion shaft 11 and does not necessitate any further machining step.

(23) Owing to the countersunk arrangement of the sealing lens 30, the latter presents no obstacle to adjacent components; the device for spiral setting can still be mounted.

(24) The design and mounting of the parting joint screw connection 32 remain unaffected, irrespective of the O-ring arrangement 31 in the sealing lens 30.