Compressor

Abstract

Compressor: Compressor comprising an atmospheric seal that ensures the sealing of a process space of the compressor against an environment. Summary Figure: Figure 1

Description

Title of the invention: Compressor State of the art

[0001] The invention relates to a compressor.

[0002] Compressors, also called compression blocks, are used to compress a process gas. The process gas can be, for example, air, CO2, methane or the like.

[0003] A compressor has a shaft that is coupled to an impeller that has a plurality of blades. The impeller is used to compress the process gas, the shaft is used to drive the impeller. In addition, a compressor has a housing in which the shaft and the impeller are rotatably mounted. The housing delimits the compressor externally from the environment.

[0004] In the case of compressors known in the art, it is known that an atmospheric seal isolates a process space of the compressor from the environment. In the case of compressors known in the art, such an atmospheric seal comprises a sealing element which rotates together with the shaft and the impeller and a static sealing element which, together with the housing, is stationary relative to the shaft and the impeller. In practice, the rotating sealing element of the atmospheric seal is designed as a sleeve and is shrink-fitted onto the shaft. The rotating sealing element, designed as a sleeve, of the atmospheric seal is therefore connected to the shaft by shrink-fitting in the case of compressors known in the art and is therefore part of the shaft. This requires the shaft and the sleeve to be manufactured with great precision. The manufacture of a compressor is accordingly expensive. Advantages of the invention

[0005] There is a need to provide a compressor that can be manufactured less expensively.

[0006] The aim of the invention is to provide a corresponding compressor.

[0007] This object is achieved by a compressor according to claim 1.

[0008] According to the invention the first sealing element, designed as a sleeve, of the atmospheric seal is arranged on the shaft forming a transition fit between the first sealing element and the shaft.

[0009] Furthermore, according to the invention, a seal which rotates together with the impeller and the first sealing element as well as with the shaft is arranged between the first sealing element, designed as a sleeve, of the atmospheric seal and a portion of the impeller which is directed towards the shaft, which seal presses the first sealing element of the atmospheric seal against a shoulder of the shaft in the axial direction away from the impeller.

[0010] In the case of the compressor of the invention, the rotatable sealing element, designed as a sleeve, of the atmosphere seal is arranged on the shaft forming a transition fit between the sleeve and the shaft. The seal between the sleeve of the atmosphere seal and the portion of the impeller which faces the shaft serves on the one hand to seal the sleeve with respect to the impeller and on the other hand to press the sleeve against a shoulder of the shaft in the axial direction away from the impeller. This can simplify the construction and manufacture of a compressor.

[0011] The first sealing element of the atmospheric seal and the second sealing element of the atmospheric seal preferably form an integral unit which is placed on the shaft as an integral unit. The first rotating sealing element of the atmospheric seal and the second static sealing element of the atmospheric seal may be arranged on the shaft as an integral unit. This further simplifies the manufacture of the compressor.

[0012] Preferably, the seal arranged between the first sealing element, designed as a sleeve, of the atmospheric seal and the impeller seals in the axial direction relative to the first sealing element, designed as a sleeve, of the atmospheric seal as well as in the axial direction relative to the impeller, preferably a first axial sealing surface being formed between the seal and the first sealing element, designed as a sleeve, of the atmospheric seal and a second axial sealing surface being formed between the seal and the impeller. This enables a particularly advantageous sealing of the compressor from the environment with a simple design and a simple manufacturing method.

[0013] Preferably, viewed in the radial direction, the seal arranged between the first sealing element, designed as a sleeve, of the atmospheric seal and the impeller and the shoulder of the shaft against which it presses the sleeve, are arranged at an axial distance from each other at the same radial position. This also makes it possible to advantageously isolate the compressor from the environment with a simple design and manufacture.

[0014] Preferred developments of the invention result from the subclaims and the following description. Brief description of the figures

[0015] An exemplary embodiment of the invention is explained in more detail and in a non-limiting manner with reference to the drawing, in which:

[0016] [Fig. 1] shows a detail of a compressor of the invention. Description of the embodiments

[0017] [Fig.l] shows a schematic detail of a compressor 10 of the invention in the area of a shaft 11 and an impeller 12 coupled to the shaft 11, the impeller 12 having a plurality of blades 13. The impeller 12 can be driven by the shaft 11, the impeller 12 serving to compress a process gas.

[0018] [Fig. 1] further shows an atmospheric seal 14 of the compressor 10 which serves to seal a process gas space 15 of the compressor 10 from the environment thereof. As can be seen from [Fig. 1], the atmospheric seal 14 is formed between rotating assemblies of the compressor 10 and stationary assemblies of the compressor 10, namely between the rotating shaft 11 as well as the rotating impeller 12 of the compressor 10 and a stationary housing 16 of the compressor 10.

[0019] The impeller 12 of the compressor 10 can be driven by the shaft 11, as already explained, and is therefore coupled to the shaft 11 by means of a coupling device 17.

[0020] The coupling device 17 can provide a coupling by force and / or by complementarity of shapes of the shaft 11 and the impeller 12.

[0021] The atmospheric seal 14 of the compressor 10 comprises a first rotatable sealing element 18 and a second stationary or static sealing element 19. The first rotatable sealing element 18 rotates together with the shaft 11 and the impeller 12 and is designed as a sleeve. The static sealing element 19 is associated with the housing 16 and is stationary, together with the housing 16, relative to the shaft 11 and the impeller 12.

[0022] The first sealing element 18, designed as a sleeve, of the atmospheric seal 14 is arranged on the shaft 11 forming a transition fit between the first sealing element 18, designed as a sleeve, and the shaft 11.

[0023] A seal 20 which rotates together with the impeller 12 as well as with the first sealing element 18 and the shaft 11 is arranged between the first sealing element 18, designed as a sleeve, of the atmospheric seal 14 and a portion 12a of the impeller 12 which is adjacent to the shaft 11 or which is directed towards the shaft 11, which seal ensures sealing in the axial direction and presses the first sealing element 18 against a shoulder 11a of the shaft 11 in the axial direction away from the impeller 12. The seal 20 arranged between the first sealing element 18 and the portion 12a of the impeller 12 ensures sealing on the one hand in the axial direction with respect to the first sealing element 18, designed as a sleeve, of the atmospheric seal 14 and on the other hand in the axial direction with respect to the paddle wheel 12, and this in such a way that a first surface axial sealing surface 21 is formed between the seal 20 and the first sealing element 18, designed as a sleeve, of the atmospheric seal 14, and that a second axial sealing surface 22 is formed between the seal 20 and the impeller 12.

[0024] The atmospheric seal 14, which comprises the first rotary sealing element 18 and the second static sealing element 19, is arranged on the shaft 11 as an integral unit when the compressor 10 is mounted. As already explained, the first sealing element 18, designed as a sleeve, of the atmospheric seal 14 is arranged on the shaft 11 forming a transition fit with the shaft 11, the sealing with respect to the shaft 11 being effected by means of the rotary seal 20. This rotary seal 20 ensures on the one hand the sealing of the first sealing element 18, designed as a sleeve, of the atmospheric seal 14 with respect to the impeller 12 and on the other hand presses the first sealing element 18, designed as a sleeve, of the seal 14 against the shoulder 11a of the shaft 11 in the axial direction.

[0025] The static sealing element 19 of the atmospheric seal 14 may comprise, for example, a dry gas sealing element and / or an oscillating ring sealing element.

[0026] The invention allows a simple design of the compressor at the atmospheric seal 14 and a simple manufacture of the compressor 10. In the case of the compressor 10 of the invention, there is a clear separation between the geometry of the shaft 11 and the geometry of the atmospheric seal 14. This simplifies the manufacturing expense of the shaft 11 of the compressor 10. The atmospheric seal 14, which comprises both the rotary sealing element 18 and the static sealing element 19 as an integral unit, can be easily mounted on the shaft 11 with little effort. List of reference signs

[0027] 10 compressors

[0028] 11 tree

[0029] shoulder

[0030] 12 paddle wheel

[0031] 12a portion

[0032] 13 dawn

[0033] 14 j spherical atmospheric ointment

[0034] 15 process gas spaces

[0035] 16 case

[0036] 17 coupling device

[0037] 18 sealing element

[0038] 19 sealing element

[0039] 20 joint

[0040] 21 sealing surface

[0041] 22 sealing surfaces

Claims

Claims

1. Compressor (10), comprising: - a shaft (11), - an impeller (12) which is coupled to the shaft (11), which has vanes (13) and which serves to compress a process gas, a housing (16), an atmospheric seal (14) for sealing a process gas space (15) from an environment, the atmospheric seal (14) being a first sealing element (18) rotating together with the shaft (11) and the impeller (12) and a second sealing element (19) which is stationary together with the housing (16) relative to the shaft (11) and the impeller (12), the first sealing element (18) of the atmospheric seal (14) which rotates together with the shaft (11) and the impeller (12), being designed as a sleeve, characterized in that the first sealing element (18), designed as a sleeve,of the atmospheric seal (14) is arranged on the shaft (11) in the form of a transition fit between the first sealing element (18) and the shaft (11), a seal (20) rotating together with the impeller (12) and the first sealing element (18) as well as with the shaft (11) is arranged between the first sealing element (18), designed as a sleeve, of the atmospheric seal (14) and a portion (12a) of the impeller (12) which is directed towards the shaft (11), which seal (20) presses the first sealing element (18) of the atmospheric seal (14) against a shoulder (11a) of the shaft (11) in the axial direction away from the impeller (12).,

2. Compressor according to claim 1, characterized in that the seal (20) arranged between the first sealing element (18) of the atmospheric seal (14) and the impeller (12) ensures sealing with respect to the first sealing element (18) and with respect to the impeller (12) each in the axial direction.

3. Compressor according to claim 2, characterized in that a first axial sealing surface (21) is formed between the seal (20) and the first sealing element (18), designed as a sleeve, of the atmospheric seal (14) and a second ...). axial sealing ring (22) is formed between the seal (20) and the impeller (12).

4. Compressor according to one of claims 1 to 3, characterized in that, seen in a radial direction, the seal (20) arranged between the first sealing element (18), designed as a sleeve, of the atmospheric seal (14) and the impeller (12) and the shaft shoulder (11a), against which it presses the first sealing element (18) of the atmospheric seal (14), are arranged at an axial distance from each other at the same radial position.

5. Compressor according to one of claims 1 to 4, characterized in that the shaft (11) and the impeller (12) are force-coupled.

6. Compressor according to one of claims 1 to 5, characterized in that the shaft (11) and the impeller (12) are coupled by complementary shapes.

7. Compressor according to one of claims 1 to 6, characterized in that the second sealing element (19) of the atmospheric seal (14) comprises an oscillating ring sealing element.

8. Compressor according to one of claims 1 to 7, characterized in that the second sealing element (19) of the atmospheric seal (14) comprises a dry gas sealing element.

9. Compressor according to one of claims 1 to 8, characterized in that the first sealing element (19) and the second sealing element (20) of the atmospheric seal (14) form an integral unit which is arranged on the shaft (11) as an integral unit.

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