JPH0318794Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in a gas supply device for supplying gas from the stationary housing side to the rotating housing side of various rotating equipment.

[Conventional technology]

As an example of this type of supply device, one that is incorporated into an air clutch as shown in FIG. 2 has been known. This air clutch has three components: a stationary housing 1, a portion of which is shown, a rotating shaft 2 rotatably supported by the stationary housing 1, and a rotating housing 3 that rotates separately with respect to the rotating shaft 2. However, the rotating housing 3 is detachably attached to the rotating shaft 2 (removable to the left in the figure). Reference numeral 4 indicates a bearing that prevents the rotating shaft 2 from wobbling. The purpose of this supply device is to smoothly supply gas from the non-rotating, stationary housing 1 side to the rotary housing 3 side, which rotates.

First to third holes are provided on the inner circumference of the shaft hole of the stationary housing 1.
Lip seals (5, 6, 7, so-called oil seals) are arranged at appropriate intervals in the axial direction. The sleeve 10 is in sliding contact with the outer circumferential surface of the sleeve 10 which is airtightly fitted with the sleeve 10 in between. The first and second lip seals indicated by reference numerals 5 and 6 are arranged with their pressure receiving surfaces facing each other, and an annular communication space 11 is formed between the seals 5 and 6. A flow path 12 piped in the stationary housing 1 communicates with this communication space 11 via a valve mechanism 13 that prevents backflow of gas, and from this communication space 11 toward the sleeve 10 and the rotating housing 3, another The flow path 14 extends to reach a supplied portion (not shown), and a supply line supplies gas from a gas supply source (not shown) to the supplied portion through the flow path 12, the communication space 11, and the flow path 14. Set. A chamber 15 formed within the stationary housing 1 is filled with oil;
It reaches the back surface of the second lip seal 6 through a flow path 16 formed in the second lip seal 6, and lubricates the sliding portion of the second lip seal 6. A chamber 17 in contact with the bearing 4 on the inner periphery of the stationary housing 1 is also filled with oil to lubricate the sliding parts of the bearing 4 and the first lip seal 5.
The third lip seal 7 and the fourth lip seal 18 installed between the rotary shaft 2 and the sleeve 10 seal out this oil, respectively.

[Problem that the invention attempts to solve]

The gas supply device having the above configuration includes a stationary housing 1
The flow path 12 on the side and the flow path 14 on the side of the rotary housing 3 are communicated through an annular communication space 11 so that gas can be continuously supplied even when the rotary housing 3 and the sleeve 10 attached thereto are rotated. However, the lip seals 5 and 6 that define the communication space 11 are not inherently very durable, and the sliding parts tend to wear out during operation. It becomes necessary to replace it with a new one, which requires time and effort for maintenance.

In view of the above points, the present invention aims to provide a gas supply device with excellent durability, and is also devised so that its components can be easily incorporated into rotating equipment.

[Means for solving problems]

In order to achieve this object, the gas supply device of the present invention is a stationary rotating equipment, in which a rotating housing that rotates separately from the rotating shaft is removably inserted around the outer periphery of a rotating shaft that is rotatably supported by a stationary housing. In an apparatus for supplying gas from a housing side to a rotating housing side, a first mounting housing carrying two stationary side sliding rings arranged in a radial direction is fitted to the inner periphery of the shaft hole of the stationary housing, A second sliding ring that carries one rotating sliding ring that is in sliding contact with both stationary sliding rings.
The mounting housing is externally inserted onto the rotating shaft, the rotating housing is detachably connected to the second mounting housing, and the rotating housing is introduced between the stationary side sliding rings from a flow path formed in the first mounting housing. The gist of the present invention is to send the gas to the rotary housing side through a flow path formed in the rotary side sliding ring and the second mounting housing.

[Effect]

The gas supply device of the present invention having the above configuration includes two
A gas flow path is passed between the sealed sliding surfaces of both large and small diameters formed by two stationary side sliding rings and one rotating side sliding ring, and due to the excellent sealing performance of mechanical seals. Therefore, gas leakage can be prevented, and at the same time, the excellent durability of the mechanical seal can be effectively utilized. Further, since the stationary side and rotating side sliding rings are respectively attached to the mounting housing to form a so-called cartridge type, the device can be easily incorporated into rotating equipment.

〔Example〕

Next, an embodiment of the present invention will be explained with reference to the drawings.As shown in FIG.
The air clutch has three components: a rotating shaft 2 rotatably supported by the stationary housing 1, and a rotating housing 3 that rotates separately with respect to the rotating shaft 2, from the stationary housing 1 side to the rotating housing 3 side. The gas supply device for supplying gas to is incorporated.

A first mounting housing 45 having an annular shape is removably fitted into the inner periphery of the shaft hole 1a of the stationary housing 1, and an annular boss 45a concentric with the rotating shaft 2 is integrally molded into the first mounting housing 45. A large-diameter stationary sliding ring 19 is engaged with the outer circumferential side of the boss 45a so as to be slidable in the axial direction, and a small-diameter stationary sliding ring 20 is slidably engaged in the axial direction with the inner circumferential side of the boss 45a. engaged. Both stationary side sliding rings 19, 2
0 are each prevented from rotating with respect to the first mounting housing 45 by a knock pin (21, only the large diameter side is shown, the small diameter side is not shown), and a spring (22, only the small diameter side is shown, the large diameter side is not shown). The rotating side sliding ring 2 is common due to the diameter side not shown).
3 and is slidably pressed against it. The rotating side sliding ring 23 is engaged with an annular boss 46a of a second mounting housing 46 that is relatively rotatably inserted around the outer periphery of the rotating shaft 2 via a bearing 47, and the second mounting housing 46 is fitted by a drive pin 24. It revolves around the housing 46. The second mounting housing 46 is configured to be fitted onto the rotating shaft 2 first with the rotating housing 3 located on its outer periphery, and one end is bolted to the rotating housing 3 through a clutch tooth 46b formed on the outer periphery. A clutch 48 with a stopper 49 engaged is provided to follow the rotating housing 3.

First mounting housing 4 on the stationary housing 1 side
A flow path 25 having a piping configuration extending into the boss 45a extends into the boss 45a, and an annular pipe is formed between the stationary side sliding rings 19 and 20 via a valve mechanism 26 for preventing backflow provided at the tip of the boss 45a. It communicates with the communication space 27 of. Both sliding rings 19, 20, mounting housing 45
The communication space 27 defined by the boss 45a and the rotating sliding ring 23 is connected to both sealing sliding surfaces on the inner and outer peripheries and two O-rings 28 and 29 fitted to the inner and outer peripheries of the boss 45a. It is then hermetically sealed. A communication hole 30 communicating with the communication space 27 is formed through the rotating side sliding ring 23, and flow paths 31 and 50 communicating with the communication hole 30 are formed in the second mounting housing 46 and the rotating housing 3. With the above configuration, the flow path 25, the communication space 27, the communication hole 30, and the flow path 3 are connected to the gas supply source (not shown).
A supply line is set to supply gas to the supplied part through 1 and 50. O-rings 51, 52, 53, 5 are provided between the rotating side sliding ring 23 and the second mounting housing 46 and between the second mounting housing 46 and the rotating housing 3 to prevent gas leakage, respectively.
4 is interposed.

Annular grooves 19a and 20a are formed in the sliding surfaces of both stationary side sliding rings 19 and 20, respectively, and the annular groove 1
9a and 20a are filled with a liquid such as oil that lubricates and cools the sliding surfaces. This liquid is supplied from a supply source (not shown) through a circulation channel so as to be maintained at a pressure equal to or higher than that of the gas. That is, the boss 4 is arranged so that the flow path 32 arranged in the first mounting housing 45 does not intersect with the gas supply line.
5a, and communicates with the annular groove 19a of the sliding ring 19 through a flow path 33 formed in the large-diameter stationary sliding ring 19 (outgoing path). The annular groove 19a and the annular groove 20a of the small-diameter stationary side sliding ring 20 are connected to a V-shaped communication hole 34 formed in the sliding surface of the rotating side sliding ring 23.
communicate with each other through. A flow path 35 extending from the annular groove 20a is formed in the small-diameter stationary sliding ring 20, and reaches the supply source via a flow path 36 formed in the boss 45a (return path). The liquid rides on this circulation flow path and is transferred to both annular grooves 19 by a pressure feeding means such as a pump.
a, 20a, and lubricates the sealing sliding surface.
Then, each sliding ring 19, 20, 23 is further cooled. In each of the outward and return paths, the connecting portions between the flow paths 33, 35 on the sliding rings 19, 20 side and the flow paths 32, 36 on the boss 45a side are connected by two O-rings 28, 37, 29 fitted on the boss 45a. , 38 to ensure a secure seal. A chamber 39 on the outer circumferential side of the large-diameter stationary side sliding ring 19 and an inner circumferential side chamber 40 of the small-diameter stationary side sliding ring 20 are filled with a liquid such as oil of a different kind or the same kind as the above-mentioned liquid, Lip seals 41, 42 and packing 43 are attached to seal the liquid.

The gas supply device includes a gas supply source on the stationary housing 1 side, a flow path 25, a communication space 27, and a communication hole 3.
0. Gas is supplied to the supplied part on the rotating housing 4 side through the flow paths 31 and 50, and the two stationary side sliding rings 19 and 20 are brought into sliding contact with one rotating side sliding ring 23. A mechanical seal prevents the gas from leaking. The stationary side sliding rings 19 and 20 have annular grooves 19a and 20a formed on their sliding surfaces.
Since the liquid is circulated and supplied to a and 20a to form a double seal structure, the sealing performance and durability of the mechanical seal can be further improved, and a highly reliable supply can be achieved without requiring much time and effort for maintenance. equipment can be provided. It is also conceivable to add pumping holes 44 as shown in the figure to the rotating sliding ring 23 to enhance the cooling effect.

The supply device is configured such that the stationary side sliding rings 19, 20 are first attached to the first side together with the knock pin 21, spring 22, etc. before being assembled into the air clutch body.
The rotating side sliding ring 23 is assembled together with the packing 43 and the like into the second mounting housing 46 to form a so-called cartridge. When assembling into the air clutch, first remove the rotating housing 3 from the rotating shaft 2 and insert the stationary side cartridge from the left side of the figure onto the rotating shaft 2 together with the bearing 4, and then attach the stationary housing 1 to the air clutch.
Then, the rotary housing 3 is inserted onto the rotary shaft 2 and positioned at a predetermined position, and then the stationary side cartridge is inserted and connected to the rotary housing 3. The cartridge on the stationary side and the rotating housing 3 can be placed first. In this way, the device handles the cartridge separately from the rotating housing 3, which is a large member, thereby improving the ease of assembling it into the air clutch.

[Effect of idea]

As explained above, the gas supply device of the present invention has the following features:
In a device for supplying gas from the stationary housing side to the rotating housing side of a rotating equipment, in which a rotating housing that rotates separately from the rotating shaft is detachably inserted around the outer periphery of a rotating shaft rotatably supported by a stationary housing, A first member carrying two stationary side sliding rings arranged in a radial direction on the inner periphery of the shaft hole of the stationary housing.
A second mounting housing carrying one rotating sliding ring that is in sliding contact with both stationary sliding rings is fitted onto the rotating shaft, and the rotating shaft is fitted onto the second mounting housing. The housings are removably connected, and gas introduced between the stationary side sliding rings from a flow path formed in the first mounting housing is connected to a flow path formed in the rotating side sliding ring and the second mounting housing. The mechanical seal is designed to feed to the rotating housing side through a passageway, and has two sealing sliding surfaces arranged in the radial direction, resulting in a compact structure in the axial direction, and the mechanical seal has excellent sealing performance and durability. Gas can be supplied smoothly over a long period of time by using the gas cartridge, and it also has the characteristics that a cartridge with a mounting housing can be constructed and easily incorporated into the main body of the device.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an air clutch incorporating a gas supply device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part of an air clutch incorporating a conventional gas supply device. 1... Stationary housing, 1a... Shaft hole, 2...
Rotating shaft, 3... Rotating housing, 19, 20...
Stationary side sliding ring, 19a, 20a... annular groove, 21
...Knock pin, 22...Spring, 23...
Rotating side sliding ring, 25, 31, 32, 33, 35,
36,50...channel, 27...communication space, 28,
29, 37, 38, 51, 52, 53, 54...
O-ring, 30, 34...Communication hole, 41, 42...
... Lip seal, 43 ... Packing, 45 ... First mounting housing, 45a, 46a ... Boss,
46...Second mounting housing, 46b...Clutch tooth, 48...Clutch, 49...Stopper.

Claims (1)

[Scope of utility model registration request] In a device for supplying gas from the stationary housing side to the rotating housing side of a rotating equipment, in which a rotating housing that rotates separately from the rotating shaft is detachably inserted around the outer periphery of a rotating shaft rotatably supported by a stationary housing, A first mounting housing carrying two stationary side sliding rings arranged in a radial direction is fitted into the inner periphery of the shaft hole of the stationary housing, and one rotating side is in sliding contact with both stationary side sliding rings. A second mounting housing supporting a sliding ring is inserted onto the rotating shaft, the rotating housing is detachably connected to the second mounting housing, and the flow path formed in the first mounting housing is connected to the stationary side. A gas supply device characterized in that gas introduced between the sliding rings is fed to the rotating housing side through a flow path formed in the rotating sliding ring and the second mounting housing.