JPH0852622A - Attaching and detaching device for shaft end part-shrinkage fitted flange - Google Patents

Abstract

PURPOSE:To particularly efficiently and quickly heat a flange in an attaching and detaching device for a flange shrinkage-fitted to the shaft end part of the main shaft of a of a ship. CONSTITUTION:As the heating means of a flange 2 to be shrinkage-fitted to a shaft end part 1, a high frequency heating coil 10 installed to the outer circumference of the flange 2 and a high frequency power source 11 connected to the coil 10 are provided, so that the flange 2 can be quickly heated by the high frequency heating coil 10 to sufficiently extend the thermal expansion difference with the shaft end part 1. Thus, support bars 6, 6' as the driving means of the flange 2, and flange driving jigs such as hydraulic jack 7 and a pressure receiving plate 8 can be reduced in size and weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft coupling for a ship main shaft or the like, and more particularly to a device for attaching and detaching a flange that is shrink-fitted to a shaft end.

[0002]

2. Description of the Related Art A conventional shaft end portion shrink-fitting flange detaching device is shown in FIG. 4, and a gas burner 12 is used as a heating means for heating a flange 2 which is shrink-fitted to the shaft end portion 1. Was used. That is, when removing the flange 2 that is shrink-fitted to the shaft end portion 1, the outer peripheral surface of the flange 2 is heated by the gas burner 12 in advance to thermally expand the flange 2 and then the flange 2. 2, a pull-out bolt 6 as a support rod projecting from
The hydraulic jack 7 sandwiched between the pressure receiving plate 8 and the end surface of the shaft end portion 1 at the tip portion of 6 ′ is extended by the hydraulic oil from the hydraulic pump 9 so that the shaft end portion 1 is separated from the flange 2 It is performed to pull it out and to escape.

Reference numerals 3 and 3'in FIG. 4 indicate keys, and reference numerals 6a, 6b, 6'a and 6'b indicate nuts. In addition to the case of removing the flange as described above, also when the flange 2 is attached to the shaft end portion 1 by shrink fitting, the heating means by the gas burner 12 has been conventionally used.

[0004]

By the way, in the flange attaching / detaching means using the gas burner 12 described above, the flange 2
It takes a lot of time to heat, and the number of steps is increased. Further, if it takes too long to heat the flange 2, when the flange 2 is removed from the shaft end 1, the temperature of the shaft end 1 also rises and expands due to heat conduction. The relative expansion of the inner diameter of 2 is not sufficiently performed, a large pressing force is required to pull out the flange 2, the capacity of the hydraulic jack 7 and the hydraulic pump 9 is increased, and the bolts 6, 6'and the pressure receiving plate 8 are increased. There is a problem in that the size of must be increased.

Further, when the gas burner as described above is used for heating the flange which is shrink-fitted to the shaft end portion of the main shaft of the ship, the work space is deteriorated because the shaft chamber in the ship is narrow.
It may lead to oxygen deficiency and gas poisoning.

The present invention is intended to solve such a problem, and enables the flange to be heated efficiently and rapidly so that the difference in thermal expansion from the shaft end can be sufficiently increased. It is an object of the present invention to provide a shaft end portion shrink fitting flange attachment / detachment device capable of easily attaching and detaching the flange.

[0007]

In order to achieve the above-mentioned object, a shaft end shrink-fitting flange attaching / detaching device of the present invention includes a heating means for heating a flange shrink-fitted to the shaft end and the same heating. A high-frequency heating coil mounted on the outer circumference of the flange, and a high-frequency electric power supplied to the coil, the flange heating means driving the flange heated by the means in the axial direction with respect to the shaft end portion. It is characterized in that it is configured with a high frequency power source.

Further, in the shaft end portion shrink-fitting flange attaching / detaching device of the present invention, the flange driving means is engaged with a plurality of support rods whose one end is retained by the flange and the other end of the support rod. And a hydraulic jack sandwiched between the pressure receiving plate and the end surface of the shaft end portion.

Further, in the shaft end portion shrink-fitting flange attaching / detaching device of the present invention, the flange driving means engages with the support rod whose one end is locked to the end face of the shaft end portion and the other end portion of the support rod. It is characterized by comprising a pressure receiving plate to be stopped and a plurality of hydraulic jacks sandwiched between the pressure receiving plate and the end face of the flange.

[0010]

In the above-described shaft end portion shrink-fitting flange detaching device of the present invention, the high-frequency heating coil mounted on the outer periphery of the shaft end portion is used as the heating means for the flange to be shrink-fitted to the shaft end portion. Since high-frequency power is supplied from the high-frequency power source, it is possible to heat the flange rapidly and sufficiently expand the difference in thermal expansion from the shaft end portion. The operation for driving is easily performed.

The flange driving means includes a plurality of support rods, one end of which is locked to the flange, a pressure receiving plate which is locked to the other end of the supporting rod, the pressure receiving plate, and the pressure receiving plate. In the case of a hydraulic jack sandwiched between the end surface of the shaft end and the hydraulic jack, the extension of the hydraulic jack causes the flange to be pulled out from the shaft end so as to be removed.

Further, the flange drive means has a support rod whose one end is locked to the end face of the shaft end, a pressure receiving plate which is locked to the other end of the support rod, and the same pressure receiving plate. And a plurality of hydraulic jacks sandwiched between the flange and the end surface of the flange, by the extension of the hydraulic jack,
The flange is pressed against the outer periphery of the shaft end to be mounted.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a shaft end shrink fitting flange detaching device as a first embodiment of the present invention, and FIG. 2 is the device of FIG. FIG. 3 is a side view of a shaft end portion shrink fitting flange detaching device as a second embodiment of the present invention.

First, the first embodiment of the present invention will be described. As shown in FIGS. 1 and 2, the outer peripheral surface of the flange 2 is mounted as a heating means for heating the flange 2 shrink-fitted to the shaft end 1. High frequency heating coil 10 and the same coil 10
And a high frequency power supply 11 capable of supplying high frequency power to The frequency of the high-frequency power source 11 may be several KHz, but if the flange 2 is small, it may be better to use 10 to 30 KHz.

Further, nuts 6a, 6'a inserted into the through holes formed in the flange 2 serve as flange driving means for axially driving the heated flange 2 with respect to the shaft end portion 1.
The pull-out bolts 6 and 6'as a plurality of support rods whose one end is locked to the flange 2 and the other ends of the bolts 6 and 6'to be locked by nuts 6b and 6'b. In addition to the pressure receiving plate 8 supported by
A hydraulic jack 7 is provided which is sandwiched between the hydraulic jack 7 and the end surface of the shaft end portion 1, and a hydraulic pump 9 is connected to the hydraulic jack 7. It should be noted that reference numerals 3 and 3'in FIGS. 1 and 2 denote keys interposed between the shaft end portion 1 and the flange 2.

In the shaft end shrink-fitting flange detaching device of this embodiment described above, the high-frequency heating coil 10 mounted on the outer periphery of the flange 2 is used as a heating means for the flange 2 shrink-fitted to the shaft end 1. Since high frequency power is supplied to the coil 10 from the high frequency power supply 11, it is possible to rapidly heat the flange 2 and sufficiently increase the difference in thermal expansion from the shaft end 1.

Therefore, by the extension of the hydraulic jack 7, the action of pulling the flange 2 away from the shaft end portion 1 can be easily and accurately performed. In addition, compared with the case of using the heating means by the conventional gas burner,
In the case of the present embodiment employing the high frequency heating coil 10, the working environment is not deteriorated, and there is no fear of causing oxygen deficiency or gas poisoning.

The second embodiment of the present invention shown in FIG. 3 shows a case where the flange 2 is attached to the shaft end portion 1 by shrink fitting, and the flange driving means has one end portion on the end surface of the shaft end portion 1. In addition to the push-in bolt 5 as a support rod locked by being screwed in, and the pressure receiving plate 8 locked by the nut 5a at the other end of the bolt 5, the pressure receiving plate 8 and the flange are also provided. 2 and a plurality of hydraulic jacks 7 and 7 ', and hydraulic pumps 9 and 9'connected to the respective jacks 7 and 7'.

The heating means for the flange 2 comprises a high-frequency heating coil 10 mounted on the outer circumference of the flange 2 and a high-frequency power source 11 capable of supplying high-frequency power to the coil 10, as in the first embodiment. It is configured. Also in the case of the second embodiment, when the flange 2 is heated, high frequency power is supplied from the high frequency power supply 11 to the high frequency heating coil 10 mounted on the outer periphery of the flange 2, so that the flange 2 is rapidly heated, It is possible to sufficiently increase the difference in thermal expansion from the shaft end portion, and the action of mounting the flange 2 by pushing it into the outer periphery of the shaft end portion 1 easily and accurately by expanding the hydraulic jacks 7 and 7 '. To be done.

Further, in comparison with the case of using the conventional heating means using a gas burner, the present embodiment employing the high frequency heating coil 10 has an advantage that the working environment can be kept extremely good. In addition, reference numeral 4 in FIG. 3 indicates a clip,
This prevents the flange 2 from falling off.

[0021]

As described above in detail, according to the shaft end portion shrink-fitting flange attaching / detaching device of the present invention, the following effects can be obtained. (1) A high-frequency heating coil mounted on the outer circumference of the flange is used as a heating means for the flange that is shrink-fitted to the shaft end, and high-frequency power is supplied to the coil from the high-frequency power source. It is possible to sufficiently increase the difference in thermal expansion from the shaft end by heating to a small amount, which requires less driving force for pulling out and pushing in the flange, and makes the flange detachment jig smaller and lighter. Therefore, the man-hours are reduced and the workability is improved. (2) Since the outer circumference of the flange is rapidly heated by the high-frequency heating coil, the work time for removing and attaching the flange can be significantly shortened as compared with the conventional means using a gas burner. (3) The flange driving means includes a plurality of support rods having one end locked to the flange, a pressure receiving plate locked to the other end of the support rod, the pressure receiving plate and the shaft end. In the case of a hydraulic jack that is sandwiched between the end surface of the shaft and the end surface of the shaft, the flange can be pulled out from the shaft end by the extension of the hydraulic jack, and the flange can be easily removed. (4) The flange drive means includes a support rod having one end locked to the end surface of the shaft end, a pressure receiving plate locked to the other end of the support rod, the pressure receiving plate, and the pressure receiving plate. When it is composed of a plurality of hydraulic jacks sandwiched between the flange and the end surface, the flange can be easily attached by pushing the flange into the outer periphery of the shaft end by the extension of the hydraulic jack. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing a shaft end portion shrink fitting flange attaching / detaching device according to a first embodiment of the present invention.

2 is a perspective view of the device of FIG. 1. FIG.

FIG. 3 is a side view showing a shaft end shrink-fitting flange detaching device as a second embodiment of the present invention.

FIG. 4 is a perspective view showing a conventional shaft end shrink-fitting flange attaching / detaching means.

[Explanation of symbols]

 1 Shaft end 2 Flange 3, 3'key 4 Clipper 5 Pushing bolt (supporting rod) 5a Nut 6,6 'Pulling bolt (supporting rod) 7, 7'Hydraulic jack 8 Pressure receiving plate 9, 9'Hydraulic pressure Pump 10 High frequency heating coil 11 High frequency power supply

Continuation of the front page (72) Inventor Takijiro Shimamoto 5-717-1 Fukahori-cho, Nagasaki City Nagahishi Engineering Co., Ltd.

Claims (3)

[Claims] 1. A heating means for heating a flange shrink-fitted to a shaft end portion, and a flange driving means for driving the flange heated by the heating means axially with respect to the shaft end portion. A shaft end shrink-fitting flange detaching device, characterized in that the heating means comprises a high-frequency heating coil mounted on the outer periphery of the flange, and a high-frequency power source capable of supplying high-frequency power to the coil. 2. The shaft end shrink-fitting flange attaching / detaching device according to claim 1, wherein the flange drive means includes a plurality of support rods having one end locked to the flange, and the other end of the support rod. Shaft end portion shrink-fitting flange attaching / detaching device, characterized in that the shaft end portion is fitted with a pressure receiving plate and a hydraulic jack sandwiched between the pressure receiving plate and the end surface of the shaft end portion. . 3. The shaft end shrink-fitting flange attaching / detaching device according to claim 1, wherein the flange drive means has a support rod whose one end is locked to an end face of the shaft end, and a support rod other than the support rod. A shaft end portion shrink-fitting flange, characterized in that the shaft end portion is fitted with a pressure receiving plate and a plurality of hydraulic jacks sandwiched between the pressure receiving plate and the end surface of the flange. Desorption device.