CN1004016B - The cylindrical outer casing of turbo machine - Google Patents

Abstract

A cylindrical outer casing for turbo machine, has the sawtooth (14) of outwardly convex on its pressure cover (7), have therewith sawtooth (12) of (11) projection to inner space accordingly on shell (1).In order to seal housing (1), lid (7) is pushed in housing (1), then rotate an angle, make whereby sawtooth (12,14) be intermeshed up every one.After pressure cover (7) is put into housing, just load onto elastomer seal (20), carry out press seal part (20) by a separable flange ring (21) being fixed on housing (1).This simple design makes the size of lid (7) and housing (1) less, and, do not need to pull down lid (7) and just can change Sealing (20).

Description

The cylindrical outer casing of turbo machine

The present invention relates to the cylindrical outer casing of a turbo machine (for example centrifugal pump or compressor) use, its end seals with a pressure cover.Around the Separation between shell and pressure cover, elastomer seal is housed, for example flat rubber pad or "O"-ring and metal " C " shape ring, to seal up the inner space of machine, also have a flange ring to be enclosed within the outer rim of pressure cover in addition.

In the known design of one, on shell or conventionally, seal machine casing from drive end, particularly on the shell of pump case or pressure cover, flange is housed, and with the screw that can bear large amount of tension, may also has nut that they are fixed tightly on shell.In order to seal up outside pressure, elasticity plain cushion or this design of " O " type packing ring (Swiss pat.562,405) are housed between lid and shell needs the flange that has the protrusion of stretching screw is installed in case cover, thereby shell is also larger; And whole lid must be taken away in order to replace Sealing.

U. S. Patent 3,874,814 have shown that a barrel-type compressor with cylinder blanket, particularly this shell are with an end cap.This shell has an interior circular groove to be used for holding the retaining member being formed by the first combined shear key; This shear key is formed and is kept together by a ring key or flange ring by four parts, and flange ring is contained on end cap with screw.

This end cap that has " O " radially ring is axially inserted in shell, and by circumferential this shear key clamping in sunder.This design very complicated to change the very large time could dismantle and assemble-as when change " O " encircle time.In addition, these radially " O " ring be to expose, just have when shell the very large damage may when lid is inserted.

Therefore, object of the present invention, be to provide a kind of simply, shell and the cap structure less with size easily, in this structure, do not pull down lid and just can dismantle Sealing.

The present invention addresses this problem like this: on the end face of barrel shell that pressure cover is housed, have radially inwardly protruded tooth, the hole that has pump to insert on it, the diameter of pressure cover matches with the internal diameter being made up of each sawtooth of housing, it has the sawtooth protruding outwardly, these sawtooth distribution and size in a circumferential direction, can guarantee that lid can be put in housing goes, and, this is round the flange ring of pressure cover, by the radial and axial elastomer seal of intermediary, for example rubber round section joint ring or metal " C " shape ring is arranged on the end face of shell.

In new design, make the sawtooth of shell and the sawtooth overlaid of lid by rotation pressure lid, to connect to bear hydraulic pressure by this sawtooth.Comprising rotor, in the drawer type assembly threading housing of stator and housing lid and after the lid rotation of carrying out just now mentioning, just put into the radial and axial seal ring being compressed by flange ring above, guarantee the sealing of pump pressure.Therefore, first new design does not need the screw of protruding flange and large amount of tension, thereby pressure cover and housing can do littlely than in the past; Secondly, prevented from damaging the danger of seal ring.And, while dismantling Sealing because occurring to leak, no longer need to pull down pressure cover.

If stamp open-work on some sawtooth of pressure cover, can be by bolt being screwed in the hole on the stator of pump, and it is more convenient to make rotor, stator and the pressure cover be assembled into the work of drawer type assembly.

In addition, the axial open-work on housing sawtooth, makes when housing is pulled down lid the pressure between their tooth be released.In they reverse rotation and before unclamping each other, every a tooth just can be by means of hydraulic medium pressure fluid-tight engagement each other.

Below, with regard to an embodiment with accompanying drawing, the present invention is illustrated more accurately:

Fig. 1, generally cuts open from the midplane of cap or pressure cover, and the detail drawing of actual cylindrical shape pump case is shown.

Fig. 2, the end elevation of the cylindrical housing looking over from the right of Fig. 1, drawer type assembly has been taken away.

Fig. 3, from the end elevation of the pressure cover direction contrary with Fig. 2 and that seem from the left side, stator and rotor have been taken away.

In barrel-type casing (Fig. 1) except holding axle 2 and one of them rotor 3 and release piston 4 thereon of dress, also has the stator 6 on stepped shaft housing 5 and last ladder thereof, in Fig. 1, cylindrical housing is by an outer housing cover 7(or pressure cover) from the right sealing, a unlimited pressure compensation pipe 8 is housed in lid.In near the inner space axle of pressure cover 7, there is a pressure reducing bushing 9 to be centered around release piston 4 around, also schematically draw a sliding ring 10.As shown in Figure 2, in open shell end regions, in the edge of the inner space 11 of shell 1, some radially inwardly protruded sawtooth that distributing, these teeth 12 in a certain distance apart from one another, are evenly distributed on circumference.Just be equipped with the hole 13 of a decentered distribution thereon every a tooth 12, as previously described, this hole, for linking the pressure tube of a not shown hydraulic system, is unloaded (assembling condition lower tooth 14 is in the behind of tooth 12) tooth 12 from the tooth 14 of pressure cover 7 when dismounting whereby.

The tooth 14 of pressure cover distributes outwardly along excircle, the internal diameter that each sawtooth of the diameter of lid and housing forms adapts.Working in coordination in shape and the position of tooth 12 and 14, makes the tooth 14 of pressure cover 7 between tooth 12, enter housing and to go, and, after pressure cover 7 and stator 5,6 are unclamped, go to-rotate in this example π/8 by rotating the back side that can make tooth 14 forward tooth 12 to.

On tooth 14, also beaten a series of open-works 15, when rotor 2,3,4, stator 5,6,9 and pressure cover 7 are assembled together while becoming a drawer type assembly, are screwed into bolt 16(Fig. 1 by this hole).For lid 7 is fixed on drawer type assembly, bolt 16 is screwed in the tapped hole 18 on fish tail joint plate 17, this fish tail joint plate 17 is positioned on the stator 6 on last step.Nature, after handle component puts in, and makes tooth 12 and 14 not tighten every an intermeshing before bolt 16 by the method for above-mentioned rotation.

For in axial and radial seal inner space 11, on the cylindrical of pressure cover 7 He on shell end face, have circular groove 19, wherein insert the round section joint ring as elastomer seal.Formed the sealing surface matching with round section joint ring by flange ring 21, flange ring closes the gap between shell 1 and pressure cover 7, and it is placed on shell 1, and fastening by the screw 22 in tapped hole 23.

Be fixed on the hole 24(Fig. 2 on shell end face) in locating stud 25, guarantee that after each dismounting and refitting lid 7 opposite shell 1 are always in same tram, thereby guarantee the correct rigging position of flange ring 21 with respect to shell 1; Lid 7 is adjusted by voussoir 26 with the relative position of flange ring 21, and this voussoir is placed in the respective cut of these two parts.

Claims (4)

1, the cylindrical outer casing of turbo machine, there is a pressure cover its end, there is a flange ring to be enclosed within the outer rim of pressure cover, feature of the present invention is, fill the hole (11) for assembling of one end of pressure cover (7) at cylindrical outer casing (1), there is inwardly protruded sawtooth (12), the diameter of pressure cover (7) matches with the internal diameter that shell sawtooth (12) forms, on pressure cover, there is the sawtooth (14) of outwardly convex, sawtooth (12, 14) layout in a circumferential direction and their Assurance of Size pressure cover (7) can be put in cylindrical outer casing (1), and flange ring (21) is the radial and axial elastomer seal (20) by intermediary, for example flexible round section joint ring or metal system (C) shape ring, and be fixed on the end face of cylindrical outer casing (1).

2, according to the cylindrical housing of claim 1, it is characterized in that, on the sawtooth of at least some pressure covers, be drilled with axial hole.

3, according to the cylindrical housing of claim 2, it is characterized in that, utilize the bolt (16) through the hole (15) on the sawtooth (14) of pressure cover, make pressure cover (7) and the stator (5,6) of machine form a drawer type assembly, be beneficial to assembling.

4, according to the cylindrical housing of claim 1, it is characterized in that, at least on some shell sawtooth, be drilled with axial hole.

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