machines for fluid transfer

Abstract

The invention relates to a machine (1) for fluid transportation comprising: a fluid displacement unit (FDU), a driving unit (DU), a common shaft (SH), a common casing (CS), enclosing the fluid displacement unit (FDU) and the driving unit (DU), a suction line (SL), connected to an inlet (IL) of the casing (CS) and through which the fluid displacement unit (FDU) receives a fluid (PF), a discharge line (DL), wherein the flow (PF) is divided by at least one division unit (DV) into a primary flow (F1) to be pumped or compressed and a secondary flow (F2), which is led to internal heat sources (HS) in the casing (CS) for cooling purpose by a conduction system (CO). According to the invention a throttling device (TH) is arranged in the suction line (SL) and a division unit (DV) is arranged upstream, wherein the flows (F2,F1) are reunited downstream the throttling device (TH).

Description

technical field [0001] The invention relates to a machine for conveying fluids, in particular a compressor or a pump, comprising: [0002] - a fluid displacement unit, which pumps or compresses fluid, [0003] - a drive unit, which drives the fluid displacement unit, [0004] - a common shaft which transmits the torque from the drive unit to the fluid displacement unit, [0005] - a common housing enclosing the fluid displacement unit and the drive unit, [0006] - a suction line, which is connected to the inlet of the housing and through which the fluid displacement unit receives the fluid to be pumped or compressed, [0007] - a discharge line, which is connected to the outlet of the casing and through which the pumped or compressed fluid is conveyed, [0008] - wherein the fluid flow is divided by at least one flow splitting unit into a first fluid flow to be pumped or compressed and a second fluid flow directed by a drainage system to an internal heat source in the hou...

AI Technical Summary

Problems solved by technology

[0011] Disadvantages of using process fluids to cool machine components include: All internal components must be designed to withstand process fluids that may eventually be chemically aggressive

[0013] One disadvantage of using process fluid for cooling purposes is that the process fluid must be delivered at a higher pressure level before the drainage system supplies the cooling fluid to the internal heat source due to pressure losses in the drainage system

Otherwise, the fluid flow from the process fluid, especially the cooling fluid to the heat source, will not be sufficient to achieve the desired cooling effect

This leads to a further disadvantage: the need to provide a means to increase the pressure of the cooling fluid which also generates heat during delivery at higher pressure levels which in turn increases the cooling fluid requirement

However, it may be difficult to create sufficient flow of cooling medium to cool the bearings and motor with the process gas

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