Housing of a fluid energy machine

Abstract

A housing of a fluid energy machine which extends along a longitudinal axis, includes a housing casing which extends axially, a housing cover for closing off a housing opening axially on the face side of the housing casing, an annular insert which extends in the housing in a circumferential direction and which bears against the housing casing and against the housing cover, a first seal between the housing cover and the housing casing. To save radial installation space, a second seal is between the housing casing and the annular insert, and a third seal is between the housing cover and the annular insert.

Claims

1. A housing of a fluid energy machine, which extends along a longitudinal axis, comprising: a housing casing, which extends axially, a housing cover for closing a housing opening at the axial end face of the housing casing, an annular insert, which extends in a circumferential direction in the housing and bears against the housing casing and against the housing cover, a first seal between the housing cover and the housing casing, a second seal, between the housing casing and the annular insert, and a third seal between the housing cover and the annular insert, a sealed intermediate space, which is sealed by the first seal, the second seal and the third seal and is delimited by the housing casing, the housing cover and the annular insert, wherein the sealed intermediate space is connected to a monitoring line, which connects the sealed intermediate space to a monitoring unit, which sends a signal to a controller if a process fluid enters the sealed intermediate space from an interior of the housing.

2. The housing as claimed in claim 1, wherein the housing cover comprises a first circumferential groove, in which the first seal is arranged, and wherein the housing cover comprises a third circumferential groove, in which the third seal is arranged.

3. The housing as claimed in claim 2, wherein the annular insert comprises a second circumferential groove, in which the second seal is arranged.

4. The housing as claimed in claim 1, wherein the housing comprises a barrel volute housing, and wherein the annular insert comprises a spiral insert of a turbo fluid energy machine.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is explained in more detail below on the basis of a specific exemplary embodiment with reference to schematic representations, in which:

(2) FIG. 1 shows an axial longitudinal section through part of a turbo fluid energy machine,

(3) FIG. 2 shows a detailed representation of a cutout from FIG. 1 (indicated there by II).

DETAILED DESCRIPTION OF INVENTION

(4) FIG. 1 shows a schematic representation of an axial longitudinal section of part of a fluid energy machine FEM, here a turbo fluid energy machine TFEM, with a housing CAS, which comprises a housing casing CAC, a housing cover COV and an annular insert CSP. The housing cover COV closes a housing opening COP axially at the end face of the housing casing CAC. In the housing CAS, an impeller IMP of a rotor R is arranged rotatably along an axis of rotation X. Provided on the axial end face of the housing CAS that is facing away from the housing cover COV is an axial opening, through which the rotor R is led out by means of a shaft SH of the rotor R for the transfer of a torque.

(5) The housing cover COV has an inlet opening IN, through which process fluid PF is sucked axially from the impeller IMP, which emerges radially from the impeller IMP and is collected in a volute collector SP of the annular insert CSP before leaving the housing CAS. Substantially the maximum pressure of the process fluid PF prevails in the interior IC of the housing CAS.

(6) The sealing arrangement of the housing CAS according to the invention that is represented in detail in FIG. 2 seals this pressure of the process fluid PF with respect to the surroundings.

(7) The annular insert CSP forms together with the housing casing CAC and the housing cover COV an intermediate space ISP extending in the circumferential direction CD. By means of a monitoring line ISC, the intermediate space ISP is connected to a monitoring device MU with sensors SEN. In the event that process fluid PF is detected in the intermediate space ISP, the monitoring device MU passes a signal to a central controller CU, the signal indicating that there is a leakage of the process fluid PF. This leakage is brought to the attention of an operator optically and/or acoustically by means of a commonly used human-machine interface (HMI).

(8) The intermediate space ISP is sealed by means of a first seal S1, a second seal S2 and a third seal S3. Here, the first seal S1, located in a first sealing groove SG1, seals the intermediate space ISP in such a way that an adjacent gap between the housing cover COV and the housing casing CAC is sealed. The second seal S2, arranged in a second sealing groove SG2 of the annular insert CSP, seals an adjacent gap between the housing casing CAC and the annular insert CSP. The third seal S3, which is located in a third sealing groove SG3 of the housing cover COV, seals an adjacent gap between the annular insert CSP and the housing cover COV. In the event of failure of the third seal S3 or the second seal S2, process fluid PF penetrates into the intermediate space ISP, so that the monitoring unit MU detects a leakage. The leakage indicated by means of the central controller CU through indicating instruments HMI calls upon the operator of the machine to exchange the defective seal or to repair the leak.

(9) The arrangement according to the invention makes a radially particularly space-saving construction possible, because the monitored intermediate space ISP has been relocated radially inward from the region that is exclusively between the annular insert CSP and the housing casing CAC. In this way it is possible that the first seal S1 is likewise radially inwardly offset. Consequently, following the first seal in the radially inward direction, the pitch circle for fastening screws SCR for the cover COV on the housing casing CAC can also be chosen to be smaller.