JPH10278000A - Rotary joint, nozzle device using it, and multiple nozzle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost in manufacturing and installing a device by providing a rotary shaft which pivotably supports a block body in a pierced condition at each end of a shaft part and is provided with a flow passage, and a pair of floating sheets to seal the space between a hydrostatic chamber and the rotary shaft. SOLUTION: A block body 1 is provided with a through hole 2 which is provided horizontal from a forward surface 1a toward a rear surface 1b, a water feed port 3 and a horizontal water feed passage 3a, and a longitudinal water feed passage 3b. A rotary shaft 16 is supported by ball bearings 13a, 13b, and mounted on the through hole in the block body 1. A rotor sheet 19 is fixed to the rotary shaft 16 in an attachable/detachable manner. A seal ring 21 on the rotary side is respectively fixed to each end of the rotor sheet 19. A communication passage 22 is installed from the center of the outer circumferential surface of the rotor to a flow passage 17 in an orthogonal and piercing manner. A seal part 23 seals the space between the rotor sheet 19 and the rotary shaft 16 on each side of the communication passage 22. A floating sheet 25 is arranged on each side of the color sheet 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary joint used under high speed rotation and high pressure, a nozzle device provided with the same and suitable for deburring and cleaning in a deep hole drilled in a work. More particularly, the present invention relates to a rotary joint suitable for miniaturization under the above-mentioned conditions, a nozzle device using the same and suitable for deburring and cleaning of deep holes having a small hole pitch, and a multiple nozzle device.

[0002]

2. Description of the Related Art For example, when a nozzle inserted into a deep hole is rotated at a high speed and a water jet is jetted from a nozzle tip to perform deburring or cleaning (for example, 500 to 15000).
rpm, 300 to 1000 kgf / cm ² ), it is necessary to provide a sealing structure for sealing the space between the fixed part and the rotating part with high precision in the high-pressure water supply path.

As a seal structure having such performance, a rotary joint having a mechanical seal capable of sealing with high precision, having durability such as high temperature resistance and high compression resistance, can be applied. . FIG. 5 shows the conventional rotary joint. In the figure, 50 is a casing of the rotary joint, 51 is a seal hole also serving as a supply path of high-pressure water in the casing 50, 52 is a floating sheet, and 53 is one end side. The seal hole 5
A shaft portion slidably inserted into 1, a passage 54 penetrating the axis of the shaft portion 53, a seal ring 55 fixed to the other end side of the shaft portion 53, and a seal ring 56. The flow path 57 is disposed so as to face the floating sheet 52 and is axially centered.
And 58, a seal ring fixed to the end face of the rotary tube shaft 56.

A coil spring 59 is disposed around the seal hole 51 in the casing 50 and urges the floating sheet 52 toward the rotary tube shaft 56. A coil spring 60 is similarly disposed around the seal hole 51 and is floating. A rod for stopping the rotation of the seat 52,
Is a flange portion for locking the floating sheet 52 to the rod 60 outside the shaft portion and receiving the urging force of the coil spring 59;
Is a through hole into which a.

[0005]

However, the conventional rotary joint has the following problems. 1. Flange part 61 in floating seat 52
Is required to be larger than the diameter of the shaft portion 53 by two outer diameters of the coil spring 59 (or two through holes). This means that even when the rotary joint is downsized, an extra outer diameter corresponding to the size is included. 2. The floating seat 52 has a structure in which the rotary pipe shaft 56 is pressed to only one side by the high pressure of the fluid acting on the back side of the shaft portion 53 and the urging force of the coil spring 59, and therefore, supports the rotary pipe shaft 56. Since a rolling bearing having a large capacity to withstand a considerable thrust load while maintaining high-speed rotation must be selected, the outer diameter of the rolling bearing increases, and the outer diameter of the housing increases. 3. When the rotary joint is used and a nozzle is connected to the rotary tube shaft 56 to provide a nozzle device, the coil spring 59 (or the through hole 62) cannot be reduced in size by being arranged outside the shaft portion 53. 4. When a multiple nozzle device in which a plurality of the nozzle devices are connected is provided, an extra space is disposed between the nozzles due to the arrangement of the coil spring 59 (or the through hole 62) outside the shaft portion. Depending on the deep hole pitch of the workpiece, the area that can be deburred and cleaned is narrowed, and an extra installation area is required. 5. Further, since the high-pressure fluid is supplied from the back side in the axial direction of the floating sheet, in the case of the multiple nozzle device, the high-pressure fluid is required only for the number of floating sheets, that is, for each of the nozzles. Therefore, the apparatus becomes complicated. 6. In the case of the multiple nozzles, the number of casings and pipes corresponding to the number of nozzles and their processing are required, which causes an increase in cost.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and has as its object to be suitable for miniaturization under the conditions of high speed rotation and high pressure. It is to provide a rotary joint. In addition, the present invention uses the rotary joint to provide a work, for example, a burr in a deep hole drilled in a light metal work by jetting a high-pressure water jet to be suitable for deburring or cleaning. Provided are a nozzle device provided and a multiple nozzle device which is suitable for deburring and cleaning of a deep hole having a small hole pitch, and is provided so as to be able to reduce the cost at the time of manufacturing and installing the device. It is in.

[0007]

According to a first aspect of the present invention, there is provided a rotary joint according to the present invention, wherein a hydraulic chamber is provided inside the rotary joint, and the hydraulic chamber is provided between the outside and a supply path of high-pressure water. A rotor body having a seal ring fixed to both ends of the rotor part, and both ends of the shaft part penetrating the block body with the rotor sheet housed in the hydraulic chamber. A rotary shaft having a flow path from the outer peripheral surface of the rotor portion to one end of the shaft; and a seal ring fixed to an end surface of the cylindrical portion, the seal ring being opposed to the seal ring of the rotor sheet, respectively. When the portion is mounted on the rotary shaft, the groove provided on the outer peripheral surface of the cylindrical portion is locked on the fixed side, and the cylindrical portion is positioned on the rotor seat side by a coil spring inserted along the outer peripheral surface of the rotary shaft. And configured to include a; and a pair of floating sheets for sealing between the rotary shaft and the hydraulic chamber by being biased toward.

According to a second aspect of the present invention, in the rotary joint according to the first aspect, the rotor portion is detachably fixed to the shaft portion.

According to a third aspect of the present invention, there is provided a nozzle device comprising a rotary joint according to the first or second aspect and a nozzle having an orifice at a tip, and the nozzle is connected to a rotary shaft of the rotary joint. Configuration.

According to a fourth aspect of the present invention, there is provided a multiple nozzle apparatus, comprising a plurality of the nozzle apparatuses according to the third aspect, wherein each of the rotary joint blocks is integrally provided, and a supply path of high-pressure water is integrally provided. It was configured to be communicated with.

In the multiple nozzle device according to a fifth aspect, in the multiple nozzle device according to the fourth aspect, the other end of the rotary shaft is connected to a common driving means.

[0012]

FIG. 1 is a longitudinal sectional view showing a multiple nozzle device A according to a first embodiment of the present invention, FIG. 2 is a transverse sectional view showing a multiple nozzle device A according to the first embodiment, and FIG. It is explanatory drawing which shows the use condition of. In the drawing, reference numeral 1 denotes a rectangular metal block body, a through hole 2 provided horizontally from the front surface 1a to the rear surface 1b, a water supply port 3 provided in a side surface 1c of the block body 1, and this water supply port. 3 has a horizontal water supply channel 3a provided from the side 3d to the other side surface 1d side, and a vertical water supply channel 3b communicating from the horizontal water supply channel 3a to the through hole 2 respectively. In the present embodiment, as shown in FIG. 2, two through holes 2 are provided close to each other to form a double nozzle device.

Reference numeral 4 denotes a floating sheet holding guide, which will be described later. The guide 4 has a diameter substantially the same as that of the through hole 2 and is inserted into the through hole 2 from the front and rear surfaces 1a and 1b of the block body 1. A tubular portion 6 forming a hydraulic chamber 5 between the portions, and an oval-shaped flange portion 7 provided at the rear end of the tubular portion 6 and fixed to the front and rear surfaces 1a and 1b of the block body by bolts 30, respectively. And formed. 7a is a drain hole provided in the flange portion 7. The distal end of the tubular portion 6 is provided with a protruding portion 4a formed by cutting out a portion facing the outer peripheral portion of the distal end. Also,
The inner diameter portion 6a of the holding guide 4 has the flange portion 7
A set hole 8 is opened at the side. Reference numeral 9 denotes a ring-shaped spring seat inserted into the set hole 8 on the side closer to the hydraulic pressure chamber 5, and reference numeral 10 denotes a coil spring which is inserted coaxially with the set hole 8 and next to the spring seat. The outer peripheral surface of the tubular portion 6 is provided with a seal portion 11 composed of an O-ring and a backup ring for sealing between the tubular portion 6 and the through hole 2.

Reference numeral 12 denotes a bearing flange.
It has the same oval flange portion 12a as the holding guide 4 and is fitted to the back side of each of the holding guides 4 and 4, and is fixed to the block body 1 together with the holding guide 4 by the bolt 30. 13a and 13b are ball bearings set respectively, 14 is an oil seal, and 15 is a bearing retainer provided only on the rear surface side of the block body 1. Then, by fastening the bearing flange 12 with the bolt 30, the coil spring 10 presses the spring seat 9 toward the hydraulic pressure chamber 5 side. Although FIG. 2 shows the bolts 30 arranged in a horizontal row for explanation,
By arranging a pair of bolts above and below the through hole 2, that is, in the vertical direction, the distance between the through holes 2 is made as close as possible.

Reference numeral 16 denotes the ball bearings 13a, 13
b is a tubular rotary shaft mounted on the through hole of the block body 1 and is positioned at the front end by a stepped portion having a large diameter, and the rear end is provided with a shaft stopper 16 a in the bearing retainer 15. Fixed. Reference numeral 17 denotes a flow path opened on the distal end side, and reference numeral 18 denotes an oil seal disposed at both ends of the rotating shaft 16 for preventing water from entering and protecting the bearing. A rotor seat 19 disposed in the hydraulic chamber 5 is detachably fixed to the rotating shaft 16. Reference numeral 20 denotes a tubular rotor, 21 denotes a rotary side seal ring fixed to both ends of the rotor 19, 22 denotes a communication passage provided perpendicularly from the center of the outer peripheral surface of the rotor to the flow path 17, and 23 denotes a communication path. A seal portion for sealing between the rotor 19 and the rotating shaft 16 on both sides of the communication passage 22, and 24 are set screws for the rotor.

At the rear end of the rotating shaft 16, although not shown, each is connected to a common gear case via an Oldham coupling, and gears connected to the Oldham coupling are arranged in the gear case. 2
The gears are provided so as to be interlocked with one drive source by meshing a drive pinion with the gears.

Reference numeral 25 denotes a floating seat, which is arranged on both sides of the rotor seat 19. Reference numeral 26 denotes a cylindrical portion thereof, which is formed by a small diameter portion 26a and a large diameter portion 26b, and a fixed side seal ring 27 is fixed to an end surface of the large diameter portion 26b. The pressure receiving area is formed such that the pressure receiving area on the back side of the large diameter portion 26b is larger than the pressure receiving area on the seal ring side in a state in which the pressure receiving area 21 is in contact therewith. Reference numeral 29 denotes a seal portion disposed between the small diameter portion 26a and the tubular portion 6. Then, the rotary shaft 1 is held in a state where the small diameter portion 26a is in contact with the spring seat 9.
6, the fixed-side seal ring 27 comes into surface contact with the rotary-side seal ring 21 to form a mechanical seal portion. In the outer peripheral portion of the large-diameter portion 26b, when the floating sheet 25 is inserted into the rotating shaft 16 to form a seal portion, a groove that is engaged with a protruding portion 4a provided at the distal end of the tubular portion of the holding guide 4. 28 are provided in the axial direction. Code 1 (Block) to Code 28
(The groove) constitutes the rotary joint B.

Reference numeral 40 denotes a tubular nozzle tip, and an orifice 41 is provided at a tip thereof in a direction perpendicular to the axis. A nozzle joint 42 is appropriately added to the nozzle tip 40 in accordance with the depth of a deep hole of a work (not shown) or the position of a burr, and then connected to the tip of the rotary shaft 16 to form a multiple connection. The nozzle device A is formed.

Next, the operation will be described. First, the floating sheet 25 is given an initial pressure by pressing the end of the small diameter portion 26a by the coil spring 10, and the rotor sheet 1
9 is brought into contact with the pressing force as appropriate. During deburring and cleaning, as shown in FIGS. 1 to 3, high-pressure water is supplied from a water supply port 3 so that the high-pressure water is supplied to the horizontal water supply passage 3.
a, it flows into the hydraulic chamber 5 via the vertical water supply passage 3b. Since the hydraulic chamber 5 is sealed by the seal portions 11 and 29 of the holding guide 4, when the high-pressure water is filled in the hydraulic chamber 5, the floating sheet 25 receives the pressure of the high-pressure water, and the two seal rings 21. , 27 are brought into strong contact with each other, and high-pressure water flows into the flow path 17 of the rotary shaft 16 from the communication path 22 (indicated by an arrow, but an arrow a indicates drain). Then, by rotating the rotary shaft 16 at high speed by the driving source, the water jet injected from the orifice 41 at the tip of the nozzle tip 40 inserted into the deep hole of the work is rotated at high speed, and deburring in the deep hole can be performed. In this case, the floating sheet 25 is provided with the groove 2 of the large diameter portion 26b.
8 is locked to the protruding portion 4a of the tubular portion 6 which is the fixed side, rotation is prevented, and the relationship between the rotating side and the fixed side of the seal portion can be maintained.

As described above, in the multiple nozzle device A of the present embodiment, a rotary joint is employed for the rotating portion of the nozzle, and the seal portion of the rotary joint is provided with a flow passage of the rotating shaft. Rotor sheet 19 having a communication passage 22 for supplying high-pressure water to the rotor sheet 19;
Since a mechanical seal including a pair of floating sheets 25 that seal both sides of the nozzle with respect to the fixed side is employed, the nozzle can be used for deburring and cleaning under conditions of high speed rotation and high pressure. Further, since the coil spring 10 for increasing the size of the rotary joint is inserted along the outer peripheral surface of the rotating shaft 16, a large flange for contacting the coil spring 10 is not required. And the projecting portion 4a are formed through the through-hole 2 for forming the hydraulic chamber.
The rotary joint part B is reduced in size by providing
As a result, the multiple nozzle device A could be downsized.
Further, since a pair of floating seats 25 are used and press the rotor seat 19 from both sides on the axis, the load in the thrust direction of the rotating shaft 16 is very small, and therefore the ball bearings 13a, 13b supporting the rotating shaft 16 are provided.
Can be set to a smaller capacity, that is, a smaller outer diameter, and accordingly, the size can be reduced. In addition, the rotor seat portion 19 can be attached to and detached from the rotating shaft 16, so that the seal ring 21 can be easily replaced, and a general commercially available tube material for the rotating shaft itself can be used to reduce costs. Can be planned. Further, since the high-pressure fluid can be supplied to all the nozzle devices simply by supplying the high-pressure fluid from one side to one location, the piping portion is simplified. Therefore, in the case of the multiple nozzle device A, the number of casings and pipes corresponding to the number of nozzles, the processing thereof, and the like are reduced, and the cost during manufacturing and installation can be reduced.

Next, a second embodiment will be described with reference to FIG. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 4 shows a main part of the nozzle device according to the second embodiment. In the drawing, reference numeral 45 denotes a rotor seat portion, 46 denotes a rotating shaft portion, and
5 and the rotating shaft 46 are integrally formed. In this case, there is no need to drill a hole for inserting the rotating shaft in the rotor seat portion or drill a screw hole for fixing, and there is an advantage that assembly can be performed easily.

Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to this embodiment, and there are design changes and the like without departing from the gist of the invention. This is also included in the present invention.

For example, a description has been given of an example in which one block body is provided with two nozzle units.
Many such as a series may be provided. Also, three or more sets of drive motors may be linked by adding a belt drive unit or the like.

Although the block body 1 is formed in a rectangular shape, it may be formed in a cylindrical shape. In this case, there is an advantage that it can be easily integrated into another device.

The configuration of the nozzle tip 40 forming the nozzle device, for example, the orifice 41 can be set in various ways such as perpendicular to the axis, the direction of the axis, and the direction of inclination with respect to the axis.

[0026]

As described above, in the rotary joint according to the first aspect of the present invention, the seal portion has a communication passage for supplying high-pressure water to the flow path of the rotary shaft. And a pair of floating sheets for sealing both sides of the rotor sheet to the fixed side, so that the rotor sheet can be used under conditions of high speed rotation and high pressure. In addition, since a coil spring for increasing the size of the rotary joint is inserted along the outer peripheral surface of the rotating shaft, a large flange for abutting the coil spring is not required. The rotary joint can be arranged in the through hole, and the rotary joint can be reduced in size. In addition, since a pair of floating seats is used and presses the rotor seat from both on the shaft center, the load in the thrust direction of the rotating shaft becomes very small, so that the bearing supporting the rotating shaft has a small capacity, that is, an external bearing. Since a small diameter can be set, an effect such as a reduction in size can be obtained.

In the rotary joint according to the second aspect of the present invention, the rotor seat is detachable from the rotary shaft because of the above configuration, so that the seal ring fixed to the rotary seat can be easily replaced. As the tube material itself, a commercially available product can be used, and effects such as cost reduction can be obtained.

[0028] In the nozzle device according to the third aspect of the present invention, since the above configuration is adopted, the seal portion of the rotary joint portion has a communication passage for supplying high-pressure water to the flow path of the rotating shaft, and the rotor sheet; A mechanical seal structure composed of a pair of floating sheets that seals both sides of the sheet to the fixed side can be used for deburring and cleaning under conditions of high speed rotation and high pressure. Also, since a coil spring for increasing the size of the rotary joint is inserted along the outer peripheral surface of the rotating shaft, a large flange for abutting the coil spring is not required. Since the nozzle device is formed and arranged in the through hole for forming the hydraulic pressure chamber, the size of the nozzle device can be reduced. In addition, since a pair of floating seats is used and presses the rotor seat from both on the shaft center, the load in the thrust direction of the rotating shaft becomes very small, so that the bearing supporting the rotating shaft has a small capacity, that is, an external bearing. Since a small diameter can be set, an effect such as a reduction in size can be obtained.

In the multiple nozzle device according to the fourth aspect of the present invention, since the above-described configuration is adopted, in addition to the above-described effects, even when the pitch of the deep holes for deburring and cleaning is small, it can be performed simultaneously. Further, the high-pressure fluid can be supplied to all the nozzle devices simply by supplying the high-pressure fluid to one location from one side of the block body, so that the piping portion can be simplified. The number of casings and pipes corresponding to the number of nozzles, the processing thereof, and the like are reduced, and effects such as reduction in manufacturing and installation costs can be obtained.

In the multiple nozzle device according to the fifth aspect of the present invention, the pitch between the nozzles can be reduced because of the above-mentioned configuration. is there. Therefore, effects such as simplification of the driving portion can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a multiple nozzle device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating the multiple nozzle device according to the first embodiment.

FIG. 3 is an explanatory diagram illustrating a use state of the multiple nozzle device according to the first embodiment.

FIG. 4 is an explanatory diagram illustrating a main part of a nozzle device according to a second embodiment.

FIG. 5 is an explanatory view showing a main part of a conventional rotary joint.

[Explanation of symbols]

 Reference Signs List A Multiple nozzle device B Rotary joint 1 Block body 2 Through hole 3 Water supply port 3a Horizontal water supply path 3b Vertical water supply path 4a Projection (stop of floating seat) 5 Hydraulic chamber 10 Coil spring 13a Ball bearing 13b Ball bearing 16 Rotation Shaft 17 Rotary shaft flow path 19 Rotor seat 20 Rotor 21 Rotary side seal ring 22 Rotor seat portion communication path 25 Floating sheet 27 Fixed side seal ring 28 Groove (rotation of floating sheet) 40 Tubular nozzle tip

Claims (5)

[Claims] 1. A block body having a hydraulic chamber therein and having the hydraulic chamber communicated with the outside by a supply path of high-pressure water; and a rotor sheet having a seal ring fixed to both ends of a rotor portion and the rotor. A rotating shaft having both ends of the shaft portion pivotally supported with the sheet penetrated through the block body in a state where the sheet is accommodated in the hydraulic chamber, and having a flow path from the outer peripheral surface of the rotor portion to one end of the shaft; A seal ring is fixed to an end surface, and when the seal ring is opposed to the seal ring of the rotor sheet and the cylindrical portion is mounted on the rotating shaft, a groove provided on the outer peripheral surface of the cylindrical portion is engaged with the fixed side. A pair of floating members that are stopped and sealed between the hydraulic chamber and the rotating shaft by the cylindrical portion being urged toward the rotor seat by a coil spring inserted along the outer peripheral surface of the rotating shaft. Sheet and A rotary joint comprising: 2. The rotary joint according to claim 1, wherein said rotor portion is detachably fixed to said shaft portion. 3. A nozzle device comprising: the rotary joint according to claim 1; and a nozzle having an orifice at a tip, and the nozzle is connected to a rotation shaft of the rotary joint. 4. A multi-unit comprising a plurality of nozzle devices according to claim 3, wherein a block body of the rotary joint is provided integrally with each other, and a supply path of high-pressure water is connected integrally. Nozzle device. 5. The multiple nozzle device according to claim 4, wherein the other end of the rotating shaft is connected to a common drive unit.