DE2518628A1 - Turbo compressor of multi stage type - has rotors attached to separate drive shafts which are powered by a common bevel gear system - Google Patents

Abstract

A multi stage turbo compressor having rotors arrayed in a sequential series in the flow direction, and attached to two or more drive shafts which run parallel to each other in such a way that the drive shafts are driven by a common gear wheel through a pinion or bevel gear and such that the shats revolve at different velocities. Constructed in such that one pair of rotors (2, 4 and 6, 8) on eac bevel gear shaft are attached by means of facings or backings to the side of the system nearest the drive.

Description

GUTEHOFFNUNGSHÜTTE STERKRABF

Corporation. 9R1R628

PA-Sch.H / Ri 42 Oberhausen 11, April 24, 1975

2283

Multi-stage turbo compressor.

The invention relates to a multistage turbo compressor with flow-connected one behind the other Impellers running on two or more parallel to each other arranged shafts are overhung, the shafts from a common gear by pinions are driven and run at different speeds. '

In turbo compressors of this type, it is already known from German Patent 974 418 that to arrange impellers on both sides of the pinion shafts. The disadvantage here, however, is that the corresponding intercoolers are used to avoid long intermediate lines must be arranged on both sides or below the gear housing, the drive of the pinion driving common gear is complicated and expensive, and that each stage has an outer gland, so that relatively high external leakage losses occur.

Turbocompressors are also known in which different from the subject matter of the above German patent veryIft more than two stages only are arranged on one side of the gear housing.

6098U / 07Q5

However, the disadvantage of these stages is that they each have a separate pinion shaft, as a result of which very high bearing losses caused by the large number of bearings and whereby the axial thrust compensation by a possible counter-rotating There is no arrangement of the stages and relatively high external leakage losses also occur.

The known turbo compressors are therefore either equipped with impellers rotating in opposite directions, which are on both sides of the gear housing are arranged or with non-opposing impellers, which are only on one side of the gear housing are appropriate.

In contrast, it is the object of the invention to provide a turbo compressor to create which no longer has the disadvantages mentioned and those of the prior art and which in particular allows a compact design, has low storage losses, is economically producible, keeps the gear housing free on one side in order to attach the drive there and to carry out repairs and maintenance in which there is an axial thrust compensation and in which the external leakage losses are low are.

According to the invention, this object is achieved in the case of the multistage turbo compressor mentioned at the outset by that in each case a pair of running wheels on each pinion shaft 3Qur on one side on the side facing away from the drive of the transmission is arranged back to back. ·

§09844 / 0705

-3-

This arrangement is particularly suitable for even numbers of stages, but a single stage can also be advantageous for odd numbers of stages
Impeller on a pinion shaft on the drive
be arranged facing away from the side.

The arrangement of the stages or impellers according to the invention advantageously also enables the intercooler can be arranged in vertical individual housings at the front in front of the compressor stages or Intermediate cooler bundles with the compressor stages in common Housings are housed.

To facilitate maintenance and repair, the pinion shafts can be used as. A slide-in units trained Bearing brackets may be present, which can be pushed into the gearbox housing.

In the following, an embodiment of the invention is explained in more detail with reference to drawings.

Show it:

Fig. 1 is a schematic plan view of a
Turbo compressor with two pinion shafts
and separately arranged cooler housings;

FIG. 2 shows a turbo compressor according to FIG. 1

and
FIG. 3 the section III-III according to FIG. 2.

60984 4/0705 _A

As shown in Figure 1, the gas flows through the suction line 1 to the first impeller 2 (first stage), from which it is passed via the intercooler 3 to the second impeller 4 (second stage). From the exit of the In the second stage, the gas flows via the intercooler 5 to the third impeller 6 (third stage), via the intercooler 7 to the fourth impeller 8 (fourth stage) and from there via the pressure line 9 to the consumer.

The individual stages are driven by a common gear wheel sitting on the gear shaft 10, which drives pinions 11 and 12 on pinion shafts. The pinions 11 and 12 are designed so that the step groups 2, 4 and 6, 8 each with the for the relevant volume flow or for the relevant Pressure run optimal speed.

It is achieved in this way that the changed gas volumes not only via reduced impellers, but can also be taken into account via the speeds of the impellers. Be at higher pressure So not only smaller impellers, but also higher speeds applied.

The pinion shafts, on the free end of which the impellers 2, 4 and 6, 8 are cantilevered, are stored in bearing supports 13 and 14, which as

Easily exchangeable slide-in units are built into the gear housing 15.

Both the low-pressure compressor are attached to the gearbox housing housing 16 and the high pressure compressor housing 17 flanged.

As shown in FIG. 2, the intercoolers can alternatively also be built into the compressor housing be. The impeller or compressor stage arrangement with its drive remains unchanged. It takes place So the suction via the line 1 to the first impeller 2, from there to the intercooler 18, which is shown in Example has two cooler bundles, from there to the second impeller 4 and after exiting the second The next stage is the gas to be further compressed from the low-pressure compressor housing 22 via the connecting line 21 passed to the high pressure compressor housing 23. In the high pressure compressor housing 23 flows it through the intercooler 19 to the impeller 6 of the third stage and from there via the intercooler 20 to the impeller 8 of the fourth stage, from which it is discharged via the pressure line 9 to the consumer.

It can be seen that in this embodiment, too, with the compressor housing, the impellers and the intercooler include that back-to-back arrangement

- "- 6 609844/0705

(Back to back) according to the invention can be observed advantageously.

It can be seen that there is the inventive Design an ideal solution for the problems at hand.

6098U / 0705

Claims (5)

GUTEHOFFNUITGSHÜTTE STERKRADE Aktiengesellschaft PA-Sch.H / Ri 42 Oberhausen 11, April 24, 1975 2283 patent claims; 1.) Multi-stage turbo compressor with impellers connected one behind the other in terms of flow, which on two or more waves arranged parallel to one another are cantilevered, the waves vcr a common gear made by pinions are driven and run at different speeds, thus marked e t that in each case a pair of impellers (2,4 and 6,8) on each pinion shaft only on one side on the Drive facing away from the side of the transmission is arranged back to back. 2.) Turbo compressor according to claim 1, characterized in that in the case of an odd number Number of stages apart from the pairs of impellers, a single impeller on one of the pinion shafts on the is arranged facing away from the drive side. 3.) ^ Turbo compressor according to claim 1 or 2, characterized in that the intercooler (3,5,7) are arranged in vertical individual housings at the front in front of the compressor stages (Flg. 1). 6Q93 4W0705 4.) Turbo compressor according to claim 1 or 2, characterized in that the Housed between the cooler bundles (18, 19, 20) with the compressor stages in common housings (22, 23) are (Pig. 2). 5.) Turbo compressor according to claim 1 to 4, characterized in that for the tickle shafts designed as slide-in units in the gear housing (15) (13, 14) are available. 609844/0705 4 Le e rs e ite