JPH082479Y2 - Segment sealing device for blowers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a segment seal device for a blower,
More specifically, the present invention relates to a technique for facilitating attachment / detachment work.

[Prior Art] Conventionally, for example, an overhang type blower as shown in Fig. 6 has been known as a blower for supplying hot air for drying textiles in a drying device. Spindle B with impeller A attached to
And a shaft hole D for inserting a main shaft formed in a casing C accommodating the impeller A is sealed by an annular sealing device E to maintain a predetermined air volume and a static air pressure to reduce the ventilation efficiency. Configured to prevent.

[Problems to be Solved by the Invention] However, in the conventional overhang type blower, the sealing device E is attached from the front side of the casing C, that is, from the front surface of the back wall portion c of the casing C. When removing the seal device E for maintenance, or when replacing the seal material of the seal device E, remove the cap nut F screwed to the suction side cover flange G and the tip of the main shaft B, and then the blade. It is necessary to perform a complicated work of pulling out the vehicle A from the main shaft B, and further, after mounting the sealing device E, it is necessary to mount the impeller A, the cap nut F and the suction side cover flange G again. It has a drawback that it is extremely difficult to attach and detach.

The present invention has been made in view of the above situation,
An object of the present invention is to provide a segment sealing device for a blower, which has an excellent sealing function, but can greatly improve the workability of attachment / detachment during maintenance or the like.

[Means for Solving the Problems] In order to achieve the above object, a segment seal device for a blower according to the present invention has a main shaft to which an impeller is attached at a tip, and a casing in which the impeller is housed. A sealing device for sealing between a main shaft insertion shaft hole and a plurality of annular cases that are loosely fitted to the main shaft in the axial direction, and a plurality of stages of annular spaces are formed in the axial direction. A segment case member formed on the segment case member, a segment seal member disposed in each of the annular spaces of the segment case member and circumferentially divided into a plurality of segments, and fitted onto the main shaft; A first elastic member for annularly coupling and holding the individual divided segment seal members, and a second elastic member for biasing each segment seal member toward the adjacent annular case for sealing. A metal holding member that is arranged on the outer circumference of the segment case portion and is divided into a plurality of pieces in the circumferential direction to fix the segment case portion to the casing in a detachable manner, and the segment seal member is provided from the rear side of the casing. It is detachably attached to the casing.

[Operation] According to the present invention, when a plurality of annular cases are axially adjacent to each other in the axial direction and are sequentially loosely fitted to form a segment case portion, each of the annular spaces formed between the adjacent annular cases is formed. The segment seal members divided into a plurality of parts in the circumferential direction are sequentially arranged so as to be externally fitted to the main shaft, and the first elastic member is externally fitted to each segment seal member to hold the divided single parts of the segment seal members in an annular shape. In addition, the segment seal member that is coupled and held in the annular shape is urged toward the adjacent annular case side by the second elastic member to perform a predetermined seal and prevent the leakage of the air blown from the segment seal device. It is possible. When removing the segment seal device or replacing the segment seal member for maintenance,
After removing the metal holding member from the casing and dividing it in the circumferential direction by the work from the back side of the casing, without the need for complicated work such as removing the suction side member such as the cover flange and the impeller from the main shaft,
By pulling out each annular case of the segment case portion from the main shaft, each segment seal member can be easily taken out, and the attachment / detachment work of the segment seal device can be easily performed.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a vertical side view of the present invention. In the drawing, an impeller 2 is attached to a tip portion 1A (left end portion of the drawing) of a main shaft 1 so as to be rotatable at the same time, and a base portion 1B is the same as the sixth example described in the conventional example. Similar to the main shaft B in the figure, it is rotatably supported by a bearing (not shown) and has a diameter larger than the tip 1A formed between the tip 1A and the base 1B and slightly smaller than that of the base 1B. A metal sleeve 3 is fitted on the intermediate portion 1C, and the metal sleeve 3 is attached to the tip surface of the base portion 1B of the main shaft 1 and the boss portion of the impeller 2.
It is held by the rear end surface of 2A, and a ceramic coating layer 3A is formed on the outer peripheral portion of this sleeve 3.

The segment case portion 4 is outwardly with respect to the sleeve 3, that is, a plurality (for example, three) of metal annular cases 5A that are loosely fitted to the main shaft 1 via the sleeve 3 toward the opposite side of the impeller 2. , 5B, 5C and the annular cover member 5D made of metal are arranged adjacent to each other in the axial direction to form a plurality of annular spaces 6A, 6B, 6C in the axial direction.

FIG. 2A shows an annular case 5A, FIG. 2B shows annular cases 5B and 5C, and FIG. 2C shows an annular cover member 5D, both of which are integrally formed in an annular shape, and each annular case 5A, 5B, 5C is As shown in FIG. 1, it has a partition wall portion 5X extending in the radial direction and a peripheral wall portion 5Y extending axially outward from the outer peripheral edge portion of the partition wall portion 5X in parallel to the main shaft 1, respectively. The inner diameters of the two are the same and are set to be slightly larger than the outer diameter of the sleeve 3.

The outer diameter of the annular case 5A is formed to be larger than that of the other annular cases 5B and 5C, and a flange portion 5A1 extending radially outward from the outer end of the peripheral wall portion 5Y is formed, as shown in FIG. 2A. Thus, the flange portion 5A1 is formed with four through holes 5a to 5d and two stepped through holes 5e and 5f at equal intervals in the circumferential direction, and an annular step is formed at the outer end inside the diameter. The part 5A2 is formed.

The annular case 5B and the annular case 5C are formed to have the same diameter, and the outer diameter of the annular cover member 5D is set to be the same as that of the annular cases 5B and 5C. Then, the outer peripheral corner portion of the inner end portion of the annular case 5B is fitted to the annular step portion 5A2 of the annular case 5A,
The outer end surface of the annular case 5B abuts the inner end surface of the annular case 5C, and the outer end surface of the annular case 5C abuts the inner end surface of the annular cover member 5D, thereby forming a plurality of annular spaces 6A, 6B, 6C.
Is formed.

2A and 2B, the partition walls 5X of the annular cases 5A, 5B, 5C have a plurality of blind through holes P1 to P3 (eg, three) from the back side at equal intervals in the circumferential direction and from the back side. Plural (for example, three) screw holes N1 to N3 are formed with the same displacement angle without interfering with each other.

In the annular spaces 6A, 6B, 6C of a plurality of stages, as shown in FIG. 3, a plurality of segment seal members 7 (for example, two divided) in the circumferential direction are arranged as shown in FIG. These segment seal members 7 are made of carbon,
Plural (eg three) from the front side at equal intervals in the circumferential direction
Blind through holes 7a to 7c (see FIG. 3) are formed, and
A plurality of divided units 7A, 7B are coupled and held in an annular shape by the elastic member 8A, and the second elastic member 8B urges the adjacent annular cases 5B, 5C and the annular cover member 5D to perform sealing. . That is, the first elastic member 8A is made of a garter spring, and is externally fitted to the divided single bodies 7A and 7B that form the segment seal member 7, and these are elastically tightened to be connected and held in an annular shape. The second elastic member 8B is formed of a coil spring, and each annular case 5
A, 5B, 5C are positioned in the blind through holes P1 to P3 of the partition wall portion 5X, through the metal annular plate member 9 formed to the inner diameter dimension equal to the inner diameter dimension of the annular case 5A, 5B, 5C, the segment Sealing is performed by urging the seal member 7 toward the adjacent annular cases 5B and 5C and the annular cover member 5D.

As shown in FIG. 4, the metal annular plate member 9 is integrally formed in an annular shape, and has a plurality of (for example, three) through holes 9a to 9c at equal intervals in the circumferential direction. Has been formed,
As shown in FIG. 1, these through holes 9a-9c are penetrated,
By screwing the bolt 10 into the screw holes N1 to N3, the bolt 10 is attached to the partition wall portion 5X of each annular case 5A, 5B, 5C, and the head portion of the bolt 10 is fitted into the blind through holes 7a to 7c of the segment seal member 7. By making them fit, the annular plate member 9 is made to abut against the inner end surface of the segment seal member 7.

Reference numeral 11 denotes a metal holding member. The holding member 11 is for integrally holding and holding the annular cases 5A to 5C and the annular cover member 5D. As shown in FIG. 5, the holding member 11 is divided into a plurality of pieces (for example, two pieces) in the circumferential direction. And a plurality of (for example, four) through holes 11A to 11D are formed at equal intervals in the circumferential direction, and the upper end is located at the two positions of the upper and lower end portions and at the two axial positions (see FIG. 1). The bolts 12A and 12A are screwed in from the left side on the side of
2B and 12B (however, only one bolt 12B is shown in the drawing) are screwed together to be disassembled and integrally coupled. Then, as shown in FIG. 1, a step portion 11E protruding radially inward is formed on the outer end portion of the metal holding member 11.

The annular case 5A of the segment case portion 4 has two stepped through holes 5e and 5f formed in the flange portion 5A1 thereof.
By screwing the bolts 16 inserted into each of the above into the back wall portion 13A of the casing 13, the peripheral wall portion 5 of the annular case 5A is
Y is fitted and fixed in a shaft hole 13B formed in the casing 13 for inserting a main shaft. Therefore, the segment case portion 4
Means that four bolts are provided in each of the four through holes 5a to 5d formed in the annular case 5A and the four through holes 11A to 11D of the holding member 11 (however, only one bolt is shown in broken lines in FIG. 1). Is inserted into the casing 13 and screwed into the casing 13. Then, the stepped portion 11E of the holding member 11 is engaged with the outer peripheral edge portion of the annular cover member 5D, and the nut 15 is screwed into the bolt 14 and tightened to be mounted.

According to the above construction, the shaft hole 13B for inserting the main shaft formed in the casing 13 accommodating the main shaft 1 and the impeller 2 is reliably sealed by the segment sealing device according to the present invention, and the annular case is provided. 5A to the back wall of casing 13
By joining the sealant to the 13A with the bolt 16 interposed therebetween, it is possible to properly maintain a predetermined air flow rate and static air pressure, and prevent a decrease in air blowing efficiency.

Next, a procedure for attaching and detaching the segment seal device for maintenance and the like will be described.

． From the rear surface side (the right side in FIG. 1) of the casing 13, the nuts 15 screwed into the bolts 14 are loosened, and the holding member 11 is horizontally moved to the right side in FIG.

Next, the bolts 12A, 12B setting the holding member 11
Loosen to divide the holding member 11 into two,
Remove from B, 5C, annular cover member 5D and main shaft 1.

． The annular cover member 5D is slid rightward along the main shaft 1 in FIG. 1, and then the segment seal member 7 is also slid rightward along the main shaft 1.

Next, when the garter spring 8A on which the segment seal member 7 is set is removed, the segment seal member 7 is set to 2
It is divided into two parts and can be removed from the main shaft 1 and the sleeve 3.

． The annular case 5C is slid rightward along the main shaft 1 in FIG. 1, and then the segment seal member 7 is also slid rightward along the main shaft 1.

Next, the segment seal member 7 from which the garter spring 8A on which the segment seal member 7 is set is removed is divided into two units 7A and 7B, and the main shaft 1 and the sleeve 3 can be removed from the main unit 1.

． The ring-shaped case 5B is carried out similarly to the ring-shaped case 5C, and the segment seal member 7 is removed.

When setting a new segment seal member 7 for replacement, the procedure may be performed in the reverse order of the above steps.

The plurality of second elastic members 8B mounted in the blind through holes P1 to P3 in the annular cases 5A, 5B, and 5C are inserted into the through holes 9a to 9c formed in the annular plate member 9 by inserting the bolt 10 into each of them. The second elastic member is configured to be screwed into the screw holes N1 to N3 of the partition wall portion 5X.
8B and the annular plate member 9 are unitized with the annular cases 5A, 5B and 5C.

In this way, the work of removing the segment seal member 7 for maintenance of the segment seal device is
It can be easily performed without removing the impeller 2.
That is, the detaching workability of the segment seal member is significantly improved, and the detaching work can be facilitated.

[Advantage of the Invention] As described above, according to the present invention, a plurality of stages of segment seal members are arranged adjacent to each other in the axial direction between the main shaft and the main shaft insertion shaft hole formed in the casing. In addition to the above, the segment seal members and the adjacent annular case among the plurality of annular cases in the axial direction are also elastically sealed, so that an excellent sealing function can be exerted. Moreover, by removing the metal holding member from the casing and dividing it in the circumferential direction by the operation from the back side of the casing, each segment seal member can be easily removed by pulling out each annular case of the segment case portion from the main shaft. Is possible,
When removing the segment seal device or replacing the segment seal member during maintenance, it is possible to perform work only from the back side of the casing without the need for complicated work such as withdrawing the suction side member such as the cover flange and the impeller from the main shaft. The effect is that the workability of attachment / detachment can be greatly improved.

[Brief description of drawings]

FIG. 1 is an enlarged vertical side view showing an embodiment of the present invention, 2A.
Figures and 2B are rear views of the annular case, FIG. 2C is a front view of the annular cover member, FIG. 3 is a front view of the segment seal member, FIG. 4 is a front view of the annular plate member, and FIG. 5 is a holding member. And FIG. 6 is an explanatory sectional view showing an example of an overhang type blower to which a conventional sealing device is applied. DESCRIPTION OF SYMBOLS 1 ... Main shaft 2 ... Impeller 4 ... Segment case part 5A-5C ... Annular case 5D ... Annular cover member 6A-6C ... Annular space 7 ... Segment seal member 8A ... 1st elastic member 8B ... 2nd elastic member 11 ... Metal Holding member 13 ... Casing 13B ... Shaft hole for main shaft insertion

Claims (1)

[Scope of utility model registration request] 1. A seal device for sealing between a main shaft having an impeller attached to a tip end thereof and a main shaft insertion shaft hole formed in a casing in which the impeller is housed. A plurality of annular cases, which are loosely fitted to the main shaft, are arranged adjacent to each other in the axial direction to form a plurality of stages of annular spaces in the axial direction, and a circumferential direction that is arranged in each of the annular spaces of the segment case section. A segment seal member which is divided into a plurality of parts and which is externally fitted to the main shaft; a first elastic member which is fitted to each segment seal member and which holds the divided single bodies of the segment seal members in an annular shape; A second elastic member that urges and seals the adjacent annular case side is disposed on the outer periphery of the segment case portion, and the segment case portion is divided into a plurality of portions in the circumferential direction. Comprising a metal retaining member removably secured to Sing, said segmented seal member blower for segmented seal apparatus characterized by being removably attached to the casing from the rear side of the casing.