JPS5825165Y2 - A device that temporarily supports the shaft in a hermetically sealed manner. - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a device for temporarily supporting a shaft in a sealed manner.

U.S. Pat. No. 2,911,290 discloses a means for removing and replacing a shaft sealing device, referred to as a mechanical seal, by necessarily moving the shaft in a relatively axial direction; The shaft extends within the container and/or is associated with a device that drives the shaft.

However, such measures require much more work space or headroom and require a more complete procedure and arrangement of each part.

The main purpose of the present invention is to eliminate the shortcomings, deficiencies, inefficiencies, shortcomings and problems of conventional means associated with shaft-related work, e.g. the replacement of shaft sealing devices which necessarily operate in a fluid enclosure under pressure. It's about doing.

Another object of the present invention is to provide a new, improved and efficient apparatus for temporarily sealingly supporting a shaft extending into a fluid under pressure while activating a seal for the shaft.

According to the present invention, there is provided a device for temporarily and sealingly supporting a rotatable shaft having one end extending into a fluid and having a shaft sealing device at the other end, the device comprising: a pair of fixing members fixed to the shaft portion between the shaft sealing device and spaced apart from each other in the axial direction; A pair of temporary sealing support members that move in the axial direction to tightly contact the related fixing members and temporarily sealingly support the shaft, and a drive device that reciprocates these temporary sealing support members are fixed to the other end side of the shaft. Provided is a device for temporarily sealingly supporting a shaft, comprising a sealing ring provided on the fixing member and sealing a contact surface between the fixing member and the associated temporarily sealing support member. .

Other objects, features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments taken in conjunction with the accompanying drawings.

However, various changes and modifications may be made without departing from the spirit and scope of the novel concepts disclosed herein.

By way of example, FIG. 1 depicts a shaft 10 operatively supported by a first support device.

The first support device includes a drive shaft 11 forming part of an actuator system which may include a motor, engine or the like.

Element 12, such as the motor, is depicted carrying a drive shaft 11 and mounted within a hollow frame part 13.

The frame part 13 is flanged and removably fixed to a tubular concentric frame member 15, for example by bolts 14.

The frame member 15 has a mounting flange 17 at the end opposite the end facing the bolt 14 for engaging a barrier 18, for example a wall, confining a fluid 19, for example an industrially valuable liquid.

Barrier 18 is part of a container or storage tank, agitator or housing or the like.

On the other hand, the barrier 18 may also be part of the hull or propeller shaft housing of a ship or the like.

In any case, the attachment is such that the flange 1T is removably attached to the barrier wall 18, for example by bolts 20, with a centering boss projection 21 integrally coupled to the adjacent end of the frame member 15 extending concentrically to the opening 22 in the wall 18. Fixed.

For example, a sealing device such as a gasket 23 is provided on the flange 17.
and the wall 18.

The working end portion of the shaft 10 extends in free clearance through the opening 24 of the centering boss 21.

Boss 21 provides closure for opening 22 except for opening 24 .

The working end portion of the shaft 10 carries at its inner end any suitable working device, such as an agitator or propeller 25, for example.

In order to seal the shaft 10 against fluid leakage, a shaft sealing device 27 is provided, preferably in the form of a so-called mechanical seal.

In one desired form, the shaft seal 27 includes a seal ring 28 carried on a collar 29.

Collar 29 is secured to shaft 10 adjacent one end of shaft 10 which is operatively supported by drive shaft 11, for example by one or more setscrews 30.

A sealing ring 31 prevents fluid leakage between the shaft 10 and the sealing collar 29.

Dynamic sealing is achieved by mounting sealing ring 28 by axially biasing it toward or against opposing axially facing surfaces of ring 32 carried by flange 33.

The attachment is such that the flange 33 is integrally connected to and projects outwardly from the boss 21 in spaced relation concentrically with respect to the aperture 24 and thus with respect to the axis 10, for example by screws. It is fixed by 34.

Sealing rings 37 and 38 seal ring 32 and flange member 33 against fluid leakage from within housing 35.

Sealing ring 28 slidably engages retaining ring 32 to dynamically seal shaft 10 against fluid leakage past housing 35.

In order to be able to carry out replacement operations on the shaft sealing device 27 in order to replace the shaft sealing ring 28 when it wears out, the shaft 10 is removed between the shaft sealing device 27 and the operation of the shaft 10 or the end of the propeller. and to enable the shaft 10 to be uncoupled in separate relation to the drive shaft 11 to free the normally coupled end of the shaft 10 for removal and replacement of the shaft seal 27. A device is provided for temporarily supporting the shaft 10 in a sealed manner against fluid leakage.

To this end, a shaft coupling assembly 39 operatively connects adjacent ends of shafts 10 and 11 in axially spaced relationship.

The two complementary halves 40 of the shaft coupling 39 are connected to the shaft sealing device 2.
More than 7 axially outward end portions of the shaft 10 are received and secured in connected relationship by longitudinally extending transverse flanges 41 which are fastened together by bolts 42.

Longitudinal key 43 maintains a co-rotating relationship of shaft coupling 39 to shaft 10, and annular key 44 maintains shaft 10 and shaft joint 39 in relative axial alignment.

The shaft coupling structure has a transverse annular attachment flange structure 45 at its end adjacent the drive shaft 11 .

This structure 45 is removably fixed, for example by bolts 47, to a transverse annular flange 48 which rotates with the drive shaft 11 and is preferably integrally connected to its end.

When it is desired to remove the shaft coupling 39, the bolts 42 and 47 and the shaft coupling half 4 separated from the shaft 10 are removed.
This is easily accomplished by removing the shafts 10 and 11 to create a substantial separation gap relationship between the ends of the shafts 10 and 11.

The temporary sealing support device, which includes means for temporarily sealingly supporting the shaft 10, is configured to be normally inactive and is provided around the intermediate portion of the shaft 10 between the working end of the shaft 10 and the shaft sealing device 27. It is located.

According to one desired arrangement, this temporary sealing support device 4
9 includes wedge ring members 50 and 51 constituting a pair of relatively longitudinally reciprocatable temporary sealing support members.

These members 50 and 51 are constructed of complementary shoulder collars which constitute a fixed member slidably supported within a preferably cylindrical tubular housing 35 and fixed to the shaft 10 in axially spaced relation to each other. 52 and 53 can be selectively brought into close contact.

In the arrangement shown in FIGS. 1 and 3, the wedge Il songs 0 and 51 are such that these rings have collars 52 and 5.
3 and an axle-sealing support position (FIG. 3) in which the rings are engaged with collars 52 and 53.

For this purpose, the collars 52 and 53 are fixedly fastened to the shaft 10 in a suitably spaced relation to each other, for example by means of a set screw 54.

In the inoperative state of these wedge rings and collars,
The wedge-like engageable angled annular surfaces 55 and 57 of the wedge ring 50 and collar 52 are in separate relationship as shown in FIG.

Similarly, complementary beveled annular wedge surfaces 58 and 59 of wedge ring 51 and collar 53 are in a spaced apart relationship.

The shaft 10 is thus allowed to rotate freely by being driven by the drive shaft 11 which provides support for the shaft via the shaft coupling 39, and the shaft sealing device 27 is free to rotate beyond the shaft 10. It operates dynamically to prevent fluid 19 from leaking.

By activating the device 49 for temporarily sealing the shaft 10, the shaft 10 is supported without the shaft coupling 39, as shown in FIG.
The sealing device 27 can be moved over the free end of the shaft 10 either for initial assembly and installation of the sealing device 27 with respect to 0 or for removal and replacement of the shaft sealing device 27.

To this end, wedge rings 50 and 51 are moved separately and relatively axially into axial support and sealing engagement with collars 52 and 53.

Thereby, the shaft 10 is firmly supported and sealed against fluid leakage without having to move the shaft 10 axially from its working position.

To ensure temporary sealing of the temporarily supported shaft, ring 6
A sealing device in the form of 0 is connected to the wedge ring 50 and the housing 35.
The sealing ring 61 seals the seam between the cylindrical surface of the
seals the removable sliding seam between rings 50 and 51, sealing ring 62 seals the seam between wedge ring 51 and the cylindrical surface of housing 35, and sealing ring 63 seals the removable sliding seam between rings 50 and 51. A separable sliding joint between the wedge ring 51 and the sealing ring 64 seals the joint between the collar ring 53 and the shaft 10.

As a result, fluid leakage beyond the shaft 10 is substantially prevented when the temporary seal support device 49 is activated.

The substantially axially spaced engagement of the wedge rings 50 and 51 to the shaft 10 via the collars 52 and 53 ensures a sufficiently stable support of the shaft 10 for tilting or axial positioning. .

The temporary sealing support device 49 is thereby advantageous in practice for a horizontal or vertical working arrangement of the shaft 10 or for any suitable angular position of the shaft between horizontal and vertical.

The device 49 can be driven in any suitable manner, for example mechanically or hydraulically or pneumatically.

- by way of example, the luff coupinion drive is connected to the first and third
Depicted in the figure.

The drive includes a pair of preferably identical diametrically opposed cooperating actuators 65 for stable, smooth and efficient operation.

These actuators 65 are operated by means of a suitable drive device comprising a handle 61 having an arm 68 shaped like a pot crane and movable through a suitable opening 69 on one side of the nozzling 35. It is operatively connected to wedge rings 50 and 51 which are adapted to be selectively actuated.

Each actuator 65 includes a suitable housing assembly 70 secured to the outside of the housing 35, for example by bolts 71.

The assembly 70 provides a longitudinal guideway for a pair of spaced apart and slidably mounted actuator rack members 72 (FIG. 2) that engage pinions 73.

The pinion 73 is keyed to a shaft 74 rotatably supported on a fixed axis by an associated housing 70, to which an arm 68 is fixed for rotation of the shaft 74 and thus the pinion 73.

The connection between the wedge rings 50, 51 and each one of the rack members 72 is made by a connecting pin 75 extending through a respective clearance slit 77 in the wall of the housing 35.

In the inoperative state of the temporary seal support device 49, the rack members 72 are in a generally sideways aligned orientation as shown in solid lines in FIG. 2, and the arms 68 are in the position shown in phantom lines.

To drive the device 49, the drive handle 67 is moved clockwise as seen in FIG. 2 to drive the pinion 73, so that the arm 68 is substantially in the dotted position and the actuator rack member 72 is The dotted position and wedge rings 50 and 51 are now in the shaft sealing and supporting relationship shown in FIG.

Thus, by simply manipulating the handle 67, the temporary sealing support device 49 can be easily and quickly activated and deactivated without moving the shaft 10 axially.

Preferably, a wedge ring 50 as shown in FIG.
' and 51' may have their adjacent ends continuous instead of stepped and overlapping as shown in FIG.
At the same time, a sealing ring device 78 seals the seam between such adjacent end of the wedge ring and the inner cylindrical wall surface of the housing 35.

The other configurations are substantially the same as shown in FIGS. 1-3.

Another form of device for temporarily sealingly supporting a shaft is depicted in FIG.

In this form, instead of the mechanical drive of the temporary shaft seal support as shown in FIGS.
9, but is provided in a device 49' which is actuated and deactivated by pneumatic or hydraulic pressure.

For this purpose, the shaft 10' is normally freely threaded through a tubular housing part 35' which is integrally connected to a frame 15' with an annular closure 2 for engaging a barrier such as a tank, vessel or ship equipment. In a spaced relationship, the first
It extends as shown in the figure.

The temporary sealing support device 49' is such that the shaft 10' is connected to the shaft sealing device 27.
10' is adapted to be driven to sealingly support this shaft 10' when released from the shaft 10'.

The shaft seal 27' is similar to that shown in FIGS. 1 and 3.

The first and third
In the manner detailed in connection with the figures, the shaft 10' is connected to the shaft sealing device 2.
1'.

In order to provide the pressure fluid drive of the device 49', the bolt 3
An annular, angular flange member 33' secured to the end of the housing 35' by the housing 35'
The housing 35' includes an annular centering boss 80 abutting the preferably cylindrical radially inner surface 24' of the housing 35'.
It has been deformed so that it extends from the end of the .

Also, the sealing ring 38' is connected to the member 33' and the housing 35'.
’ is sealed.

Even with such an arrangement, the axial front surface of the boss 80 provides one end closure for the fluid pressure working chamber area, and the other end closure for this area is provided by, for example, a screw 8
3 by a boss 81 extending into the cylinder 24' from an annular flange member 82 secured to the barrier closure member 21'.

The seam between adjacent ends of flange 82 and housing 35' is sealed by sealing ring 84.

A radially and outwardly elongated piston portion 85 of wedge ring 87 is housed within the cylindrical area between bosses 80 and 81 .

Wedge ring 87 is slidably supported within cylindrical inner diameter surface 88 of flange member 82 for reciprocating movement.

Wedge member 87 has an inclined wedge surface 89 at its end portion remote from piston enlargement 85 .

This surface 89 is supportably engageable with a complementary annular ramp surface 90 of a collar 91 secured to the shaft 10', for example by a set screw 92.

In the part of the cylindrical section on the side of the boss 80, an annular, radially and outwardly extending piston enlargement 93 of the reciprocatable wedge ring 94 is slidably engaged in the cylindrical surface 24'. There is.

A reduced diameter portion of wedge ring 94 is slidably engaged with a complementary cylindrical surface 95 of flange 33'.

The angled wedge and sealing surface 97 of the wedge ring 94
It can be attached to the complimentary graded layer surface 98 of the collar 99.

The collar 99 may include, for example, one or more setscrews 99
a and carries a sealing ring 100.

Wedge ring 94 engages with collar ring 99 in the same manner as the relationship between wedge ring 51 and shoulder collar ring 53 in FIG.
It will be clear that the has an axially extending cylindrical support bearing surface in addition to the inclined wedge bearing surface.

A sealing ring 101 seals the seam between shoulder collar 99 and shaft 10', and a sealing ring 102 seals the seam between flange 33' and housing 35'.

To facilitate fluid pressure 1 actuation of wedge rings 87 and 94, housing 35 has an axially opening blind end tubular cylindrical groove 103 for piston head portion 85 of wedge ring 87 and a cylindrical groove 103 for wedge ring 94. Opposed, axially open, squared annular cylindrical grooves 104 for the piston head portion 93 are provided, with the interposition of a solid abutment portion 105 separating these cylindrical grooves 103 and 104. of sufficient radial dimension such that

Suitable fluid-tight rings 107 seal the seams between the radially outer surfaces of the piston heads 85 and 93 and the cylindrical surface 24' of the housing 35', and two sealing devices 108 seal the joints between these piston heads 85 and 93, respectively. Rad and Groove 10
3 and the engaged radially inner surfaces of 104 are sealed.

To drive device 49', positive force fluid is communicated at its outer end via control valve 110 to a pressure fluid supply conduit 112 led from any suitable pressure source (not shown). It is adapted to be fed through a generally radial passage hole 109 located in the center.

to drive wedge rings 87 and 94 into their temporary sealed support position with respect to shoulder collars 91 and 99;
Passage hole 109 communicates at its inner end with a transverse hole 113 that opens through the blind ends of holes 103 and 104 to expose adjacent ends of piston heads 85 and 93 to pressure fluid forces.

During the drive of the wedge rings 87 and 94 by the pressure fluid,
The pressure fluid in the cylindrical area of the working chamber between the piston heads 85 and 93 and the bosses 81 and 80 flows through the control valve 110
A passage hole 114 communicating with the drain pipe 117 via
and discharged through 115.

When it is desired to release wedge rings 87 and 94 to deactivate device 49', valve 110 is actuated to connect passage hole 109 to drain line 117 and to connect passage holes 114 and 115 to pressure fluid. Supply pipeline 112
connected to.

It will, of course, be understood that the order of activation and deactivation of device 49' will substantially follow the order detailed with respect to device 49 of FIGS. 1 and 3.

Although the present invention has been described above in detail with reference to specific examples, the present invention is not limited to these specific embodiments, and it goes without saying that many changes and modifications can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal sectional view showing the shaft equipment embodying the features of the present invention, Fig. 2 is an enlarged sectional view taken substantially along the line ■-■ in Fig. 1, and Fig. 3 is A partially sectional view in the longitudinal direction similar to FIG. 1 showing a relationship different from that in FIG. 1 of the parts of the structure of the shaft equipment shown in FIG. 1, and FIG. FIG. 5 is a partial longitudinal sectional view showing in detail a slightly modified example of the device, and FIG. 10...axis, 11...drive shaft, 13.
...Frame, 14...Bolt, 15.
...Frame, 17...Flange, 18
... Barrier wall, 20 ... Bolt, 21
...Boss, 22...Opening, 23...
... Gas get, 25 ... Propeller, 27.
...Shaft sealing support device, 28...Sealing ring, 29...Brim, 30...Set screw, 32...Ring, 33. ...Flange, 35...Housing, 37, 38...
・Sealing ring, 39...Shaft coupling, 40...
...Half body, 41...Flange, 42...
...Bolt, 43,44...Key, 45...
...Surface, 47...Bolt, 48...
Flange, 49...Shaft sealing support device, 50,5
1... Wedge ring, 52, 53... Brim, 54... Set screw, 55, 57, 58, 5
9...Surface, 60°61.62,63.64・
... Sealing ring, 65 ... Actuator, 67 ... Handle, 68 ... Arm, 69 ... Opening, 70 ...・Housing, 71... Bolt, 72... Rack, 73... Pinion, 74... Shaft, 7
5...Pin, 77...Slot, 78
... Sealing ring, 80, 81 ... Boss, 82 ... Flange, 83 ... Screw,
84... Sealing ring, 85... Piston head, 87... Wedge ring, 8B, 89
, 90...Surface, 91...Brim, 92
...Set screw, 93...Piston head, 94...Wedge ring, 95, 97, 98
...Surface, 99...Brim, 99a...
...Set screw, 100.101,102...
・Sealing ring, 103゜104...Groove, 109
...hole, 110 ... control valve, 112.
...Pressure, fluid supply pipeline, 113,114°115
...hole, 11T...drain pipe.

Claims (1)

[Scope of utility model registration request] A device for temporarily sealingly supporting a rotatable shaft having one end extending into a fluid and having a shaft sealing device on the other end, the device comprising: A pair of fixing members fixed to the shaft portions between them at intervals in the axial direction; a pair of temporary sealing support members that are in close contact with the related fixing members and temporarily sealingly support the shaft; a drive device that reciprocates these temporary sealing support members; and a drive device provided on the fixing member fixed to the other end of the shaft. and a sealing ring for sealing a contact surface between the fixing member and the associated temporary sealing support member.