JP2009250344A - Rotary tool for guiding oil seal lower half part, and assembling and disassembling method of oil seal lower half part using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To assemble/disassemble an oil seal lower half part by stable work with simplifying and facilitating a suspension balance of inhibiting the oil seal lower half part from tilting. <P>SOLUTION: The rotary tool for supporting the oil seal lower half part 10 includes a threaded rod 11 inserted and screwed to the threaded hole for suspending a seal casing formed in the seal casing for the oil seal lower half part of a two-split oil seal, an arm-shaped first plate 12 fixed to the threaded rod at a proper position by a pair of nuts 13 after inserting the rod into a through-hole at one end, a flange nut 14 screwed to the other end side of the threaded rod 11 to restrict the axial movement of a hung rotation assisting rope, an arm-shaped second plate 16 having one end rotatably mounted to the other end side of the first plate 12, and a guide rod 20 fixed to the other end side of the second plate parallelly to the threaded rod 11, and having a contact element 19 at the chip part getting into contact with the sidewall of a bearing seat in a bearing bracket. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotary tool for an oil seal lower half guide used when assembling and disassembling a two-part oil seal lower half provided on the rotary shaft end side in a bearing bracket in a bearing device of a rotating electrical machine, and the tool. The present invention relates to a method for assembling and disassembling the lower half of the used oil seal.

  BACKGROUND ART A bearing device that supports a rotating shaft of a rotating electrical machine such as a hydrogen-cooled turbine generator is provided with an oil seal in which a seal member is housed in a seal casing on the rotating shaft end side in the bearing bracket.

  In such a bearing device, if the sealing effect is lost due to deterioration of the oil seal, oil and hydrogen gas for cooling in the machine leak from the gap with the rotating shaft, so the oil seal is disassembled and a new oil seal is installed. It needs to be replaced and reassembled.

  By the way, as a conventional method for assembling and disassembling the lower half of the oil seal divided into two, it has been carried out as follows.

  FIG. 4 is a schematic diagram for explaining a conventional method of assembling and disassembling an oil seal. Here, after disassembling and removing the lower half of the two-part oil seal, a new oil seal is shown. The case of installing the lower half will be described. That is, when attaching the seal casing lower half 2b containing the seal member to the rotary shaft 1 supported by a support base (not shown) as shown in FIG. 4, the seal casing lower half 2b is lifted by a wire (not shown). The oil seal rotary tool 4 attached to one end of the seal casing lower half 2b rotates the seal casing lower half 2b in the circumferential direction along the surface of the rotary shaft 1 to attach the oil seal lower half 2 Had gone.

  However, when the seal casing lower half 2b is rotated in the circumferential direction along the surface of the rotary shaft 1, if the suspension balance is poor, the oil seal lower half 2 is tilted with respect to the rotary shaft 1, and this tilt angle is increased. If it becomes remarkably large, as shown in FIG. 5, the inner peripheral surface of the seal member 2a or the lower half 2b of the seal casing and the surface of the rotary shaft 1 may be damaged.

  Therefore, as shown in FIG. 4, a plurality of square members 3 are inserted into the gap between the bearing seat 5 in the interior of the bearing bracket (not shown) and the lower half of the seal casing 2b so that the lower half 2b of the oil seal casing is connected to the rotary shaft 1. The suspension was balanced while being pressed so as not to tilt.

  The method for disassembling the lower half of the oil seal is almost the same as the assembly method described above, and the description thereof is omitted here.

Incidentally, as an oil seal assembling method, there is a method for an oil seal for assembling a protective can and an oil seal main body having a lip portion slidably contacting an axial end surface of the protective can. (For example, Patent Document 1) does not target an oil seal of a bearing device that supports a rotating shaft of a rotating electrical machine.
Japanese Patent Application No. 9-079385

  However, in such a conventional method for assembling and disassembling the lower half of the oil seal, when the lower half 2 of the oil seal is attached to the rotary shaft 1, the lower half 2b of the seal casing in the bearing bracket chamber and the bearing seat 5 Since a plurality of square bars 3 must be inserted into the gap to suspend the oil seal so that the lower half 2 of the oil seal does not tilt with respect to the rotation axis, it takes a lot of labor and time, and the workability is poor. There is.

  The present invention has been made to solve the above problems, and it is possible to easily and easily achieve a suspension balance so that the lower half of the oil seal does not tilt with respect to the rotation shaft without using square members, It is an object of the present invention to provide an oil seal lower half guide rotating tool capable of performing stable work and a method for assembling and disassembling the oil seal lower half using this tool.

  In order to achieve the above object, the oil seal lower half guide rotating tool is configured as follows, and the oil seal lower half is assembled and disassembled by the following method using this tool.

  The invention corresponding to claim 1 is a tool used when assembling and disassembling a lower half part of a two-part oil seal provided on a rotating shaft end side in a bearing bracket in a bearing device of a rotating electrical machine, A screw rod that is screwed into a screw hole for hanging the seal casing in the half seal casing, and a first through a through hole in one end of the screw rod that is inserted into the screw rod and fixed in place by a pair of nuts. A plate, a nut with a flange for restraining the axial movement of the auxiliary rope to be screwed and hung on the other end of the screw rod, and one end pivoting on the other end of the first plate A second plate attached to the second plate, and fixed to the other end side of the second plate in parallel with the screw rod; Constituting the lower half supporting the rotary tool oil seal and a guide rod having a tactile make contacts.

  According to a second aspect of the present invention, when the oil seal lower half support rotary tool according to claim 1 is used to assemble the two-part oil seal lower half in the bearing device of the rotating electrical machine, the oil seal lower half support is provided. Screw the screw part on one end side of the screw rod in the rotary tool into the screw hole for hanging the seal casing in the oil seal casing in the lower half of the oil seal. A first step of temporarily placing the lower half of the seal, and a second step of attaching an oil seal rotating tool to one end of the lower half of the oil seal disposed along the peripheral surface of the rotation shaft by the first step. And loosening the pair of nuts of the oil seal lower half supporting rotary tool to move the first plate to an appropriate position on the screw rod, The bearing is rotated at an appropriate angle, and a contact provided at the tip of the guide bar is pressed against the side wall of the bearing seat in the bearing bracket and brought into contact therewith, and the nut is tightened at this position to tighten the first plate and the second plate. A third step of fixing the plate and a rotation auxiliary rope on the inside of a nut with a flange screwed on the other end side of the screw rod in the lower half support rotary tool, and always lifting upward. And the oil seal rotary tool rotates the seal casing along the surface of the rotary shaft so that the oil seal lower half support rotary tool has a tip of the guide rod. The contact is moved while making contact with the side wall of the bearing seat as a guide. Comprising a fifth step of assembling the seal lower half.

  According to a third aspect of the invention, when the oil seal in the bearing device of the rotating electrical machine is disassembled using the oil seal lower half supporting rotary tool of the invention corresponding to the first aspect, the circumference of the rotary shaft in the bearing bracket is disassembled. A screw part on one end side of a screw rod in the oil seal lower half supporting rotary tool is screwed into a screw hole for hanging the seal casing in the oil seal casing in the lower half part of the oil seal attached on the surface. A second step of attaching an oil seal rotating tool to one end portion of the lower half portion of the oil seal disposed along the peripheral surface of the rotating shaft by the first step, and the lower half portion of the oil seal The pair of nuts of the support rotary tool are loosened to move the first plate to an appropriate position on the screw rod, and the second plate is rotated by an appropriate angle. A third step of fixing the first plate and the second plate by pressing the contact member at the tip of the guide rod against the side wall of the bearing seat in the bearing bracket and bringing the contact into contact therewith. And a fourth step in which a rotation auxiliary rope is hung inside the flanged nut screwed on the other end side of the threaded rod in the lower half supporting rotary tool and is always lifted upward. , By rotating the seal casing along the surface of the rotation shaft by the oil seal rotating tool, the contact member having the tip of the guide rod of the oil seal lower half support rotating tool has a side wall of the bearing seat. The lower half of the oil seal is disassembled while keeping the balance by keeping the balance in contact with the guide. Consisting of a step.

  According to the present invention, it is possible to easily and easily suspend the oil seal so that the lower half of the oil seal does not incline with respect to the rotation shaft without using a square member, and stable work can be performed.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing an oil seal lower half guide rotary tool used during assembly and disassembly of an oil seal.

  An oil seal lower half support rotary tool 10 shown in FIG. 1 has a screw rod 11 having an appropriate length, and an arm-shaped first plate 12 provided by inserting a through hole in one end of the screw rod 11. A pair of nuts 13 for fixing the first plate 12 to appropriate positions of the screw rod 11 from both sides thereof, a flanged nut 14 screwed into the other end portion of the screw rod 11, and a first plate An arm-shaped second plate 16 having one end pivotably attached to the other end of 12 by a bolt 15, and a screw rod by a bolt 17 and a nut 18 on the other end of the second plate 16. 11 and a guide bar 20 having a contact 19 made of, for example, Teflon (registered trademark) at the tip.

  Next, a method for assembling and disassembling the oil seal using the oil seal lower half-turn tool 10 having the above structure will be described with reference to FIGS. 2 and 3. Here, after disassembling and removing the oil seal, a new oil The case where a seal is attached will be described.

  FIG. 2 is a schematic diagram for explaining an oil seal assembling method.

  First, the threaded portion on one end of the screw rod 11 in the oil seal lower half supporting rotary tool 10 is screwed into the screw hole for hanging the seal casing in the oil seal casing 2b of the oil seal lower half, and this state is attached. As shown in FIG. 3, the lower half 2 of the oil seal is temporarily placed on the peripheral surface of the rotating shaft 1 in the bearing bracket 21.

  Further, an oil seal rotary tool 4 disposed along the peripheral surface of the rotary shaft 1 is attached to one end of the oil seal lower half 2.

  Next, in the oil seal lower half support rotary tool 10, the pair of nuts 13 are loosened to move the first plate 12 to an appropriate position on the screw rod 11, and the second plate 16 is appropriately moved around the bolt 15. The contact 19 provided at the tip of the guide bar 20 is pressed against and brought into contact with the side wall 23 of the bearing seat 22 in the bearing bracket 21 as shown in FIG. 3, and the nut 13 is tightened at this position. The first plate 12 and the second plate 16 are fixed.

  Further, the rotation auxiliary rope 24 is hung on the inner side of the flanged nut 14 screwed to the other end side of the screw rod 11 in the seal lower half supporting rotary tool 10 so as to always be lifted upward.

  When the seal casing 2b is rotated in the circumferential direction along the surface of the rotary shaft 1 by the oil seal rotary tool 4 attached to one end of the seal casing 2b in such a state, the oil seal lower half support rotary tool 10 is rotated. The contact 19 provided at the distal end of the guide rod 20 moves while being in contact with the side wall 23 of the bearing seat 22 in conjunction with the rotation of the seal casing 2b.

  At this time, since the screw rod 11 in the seal lower half support rotary tool 10 acts so as to be always lifted upward by the rotation auxiliary rope 24, the oil seal 2 is always tilted with respect to the rotation shaft 1. A stable state is maintained in parallel.

  Therefore, since the tilt of the oil seal 2 with respect to the rotary shaft 1 can be prevented by using the oil seal lower half support rotary tool 10, the suspension balance can be easily and easily achieved, and the seal member 2a and the seal A stable assembly operation can be performed without damaging the inner peripheral surface of the casing 2b and the surface of the rotary shaft 1.

  In the above description, the method for assembling the lower half of the oil seal has been described. However, when disassembling the lower half of the oil seal, the work procedure substantially similar to that of the assembling method using the above-described lower seal half supporting rotary tool 10 is used. By removing the oil seal with, stable disassembly work can be performed.

The block diagram which shows the rotary tool for oil seal lower half guides which shows the 1st Embodiment of this invention. The external view for demonstrating the assembly method of an oil seal lower half part using the rotary tool for oil seal lower half guides of the embodiment. Sectional drawing which shows the state which pressed and contacted the contactor which has the tip part of the guide rod of the rotary tool for oil seal lower half guides similarly to the side wall of the bearing seat in a bearing bracket. The schematic diagram for demonstrating the installation and removal work condition of the conventional oil seal lower half part. The figure which shows the state in which the oil seal inclined in the same operation | work.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Rotary shaft, 2 ... Oil seal lower half, 2a ... Seal member, 2b ... Oil seal casing lower half, 4 ... Oil seal rotary tool, 10 ... Oil seal lower half support rotary tool, 11 ... Screw rod, DESCRIPTION OF SYMBOLS 12 ... 1st plate, 13, 18 ... Nut, 14 ... Nut with flange, 15, 17 ... Bolt, 16 ... 2nd plate, 19 ... Contact, 20 ... Guide rod, 21 ... Bearing bracket, 22 ... Bearing Seat, 23 ... Side wall, 24 ... Rotation auxiliary rope

Claims (3)

A tool used when assembling and disassembling the lower half of the two-part oil seal provided on the rotating shaft end side in the bearing bracket in the bearing device of the rotating electrical machine,
A screw rod that is screwed into a screw hole for hanging the seal casing in the seal casing in the lower half of the oil seal; and
A first plate that is inserted into the threaded rod through a through-hole at one end and fixed at a suitable position by a pair of nuts;
A flanged nut that restrains the axial movement of the auxiliary rotation rope that is screwed and hung on the other end side of the screw rod;
A second plate having one end rotatably attached to the other end of the first plate;
An oil seal lower half support comprising a guide rod fixed to the other end portion of the second plate in parallel with the screw rod and having a contact at its distal end contacting the side wall of the bearing seat in the bearing bracket. Rotary tool. When assembling a two-part oil seal lower half in a bearing device of a rotating electrical machine using the oil seal lower half support rotary tool according to claim 1,
In the oil seal lower half support rotary tool, the screw portion on one end side of the screw rod is screwed into the screw hole for hanging the seal casing in the oil seal casing in the lower half of the oil seal, and the rotation shaft in the bearing bracket is inserted. A first step of temporarily placing the lower half of the oil seal on the circumferential surface;
A second step of attaching the oil seal rotating tool to one end of the lower half of the oil seal disposed along the circumferential surface of the rotating shaft by the first step;
The pair of nuts of the oil seal lower half supporting rotary tool are loosened to move the first plate to an appropriate position on the screw rod, and the second plate is rotated at an appropriate angle, and the guide rod A third step of pressing and contacting the contact at the tip of the bearing against the side wall of the bearing seat in the bearing bracket and fastening the nut at this position to fix the first plate and the second plate;
A fourth step in which a rotation auxiliary rope is hung on the inside of a flanged nut screwed into the other end side of the screw rod in the seal lower half supporting rotary tool, and the fourth step is always lifted upward;
By rotating the seal casing along the surface of the rotating shaft by the oil seal rotating tool, the contact member having the tip of the guide rod of the oil seal lower half supporting rotating tool is attached to the side wall of the bearing seat. An oil seal assembling method in a bearing device of a rotating electrical machine, comprising a fifth step of assembling the lower half of the oil seal while being moved in contact with the guide and always being lifted upward by the rotation auxiliary rope and balanced. When disassembling the two-part oil seal lower half in the bearing device of the rotating electrical machine using the oil seal lower half support rotary tool according to claim 1,
An oil seal lower half supporting rotary tool has a screw hole for hanging a seal casing on a screw hole for hanging a seal casing in an oil seal casing of a lower half of an oil seal attached on a peripheral surface of a rotating shaft in the bearing bracket. A first step of screwing a screw part;
A second step of attaching the oil seal rotating tool to one end of the lower half of the oil seal disposed along the peripheral surface of the rotating shaft by the first step;
The pair of nuts of the oil seal lower half supporting rotary tool are loosened to move the first plate to an appropriate position on the screw rod, and the second plate is rotated at an appropriate angle, and the guide rod A third step of pressing and contacting the contact at the tip of the bearing against the side wall of the bearing seat in the bearing bracket and fastening the nut at this position to fix the first plate and the second plate;
A fourth step in which a rotation auxiliary rope is hung inside the flanged nut screwed on the other end side of the screw rod in the lower half supporting rotary tool and is always lifted upward;
By rotating the seal casing along the surface of the rotating shaft by the oil seal rotating tool, the contact member having the tip of the guide rod of the oil seal lower half supporting rotating tool is attached to the side wall of the bearing seat. An oil seal disassembling method for a bearing device of a rotating electrical machine, comprising a fifth step of disassembling the lower half of the oil seal while being brought into contact with the guide and being always lifted and balanced by the auxiliary rotation rope.

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