JPH02142923A - Shaft coupling having aligning regulating means - Google Patents

Abstract

PURPOSE: To provide a shaft coupling ensuring alignment of shaft centers by jointing a pair of opposed shafts by means of a vertically split cylindrical coupling with one shaft fixed while the other mounted with its shaft center tiltable. CONSTITUTION: A coupling 25 connecting two shafts 11, 16 together is axially divided into a pair of semicircular arc half bodies 29, 30 and stuck by a blot 31. Both two shafts are key-locked by means of a key 32. In the vicinity of the lower end of the shaft 16, a ring type groove is cut and fixed to the coupling 25 by means of a ring piece 33. The shaft 11 is fixed by means of a shaft extension part 36 and a threaded part 37, between which a washer 38 is arranged. The hole inside the coupling 25 is expanded in the intermediate part so as to be formed into a chamber 43, while its lower part holds the shaft 11 and the shaft extension part 36 via its short part, so that the extension part 36 can change alignment wile using it as a fulcrum. In this way, the washer 38 is held in the coupling 25 by means of a screw 40 after alignment, so that a shaft coupling ensuring alignment between the shaft centers can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a joint for rigidly interconnecting the shafts of rotating machines in axial alignment, and more particularly to The present invention relates to a coupling including means for adjusting the axial alignment of a pair of axially aligned shafts.

[Conventional technology]

Two general types of joints are used to interconnect the shafts of rotating machines. One type is called a "flexible joint." When using flexible joints.

Each machine part is provided with a bearing support arrangement that supports its axis of rotation 'ftm independently and completely without the need for additional support from outside the machine. The shafts of such machinery are interconnected by flexible joints that absorb any misalignment of the shafts. Designers of such machines attempt to position the machine by aligning the axes of each axis, but the machinery may not align accurately axially or may move after installation and become misaligned. I admit that there is. Such misalignment is handled by flexible joints that allow the machine to operate even if =b is not perfectly axially aligned.

The second type of joint is referred to as a "fixed joint." Bearing supports of interconnected mechanical parts where the bearing support device for one of several mechanical devices is unsuitable to fully and independently support the shaft of such mechanical device on its own Fixed joints are usually used when the situation is compatible with the equipment. When using a fixed joint, the two parts of one machine are connected.

The parts are joined together by means such as a common support arrangement which secures them in a fixed relation to each other, and the shafts are interconnected by means of fixed joints with the intention that they are well aligned. , each axis is not necessarily perfectly aligned, and the axes of each axis are aligned, 81! Much effort is often expended to ensure that such axis alignment is maintained during use of the machinery. Alignment errors associated with fixed bearings become more likely to occur as the distance between the interconnected mechanical devices increases. FIELD OF THE INVENTION The present invention relates to a fixed joint.

[Problem to be solved by the invention]

One object of the present invention is a coupling for aligning and rigidly interconnecting the rotating shafts of a mechanical device into one, which adjusts the alignment of such shafts when necessary, and It is an object of the present invention to provide a joint having means for fixing each shaft in the last adjusted relative position so that the shafts do not move off center during operation.

Another object of the invention is to enable the end portion of one shaft to pivot within the joint to the end of the shaft to a pivoted position relative to the joint and to the other shaft secured within the joint. It is an object of the present invention to provide a fixed shaft coupling including a number of adjustment members spaced around the end portion of one shaft for movement.

[Means to solve the problem]

According to the present invention, there is provided a joint for interconnecting a pair of axially aligned tongues for transmitting torque from one shaft to the other, and for connecting adjacent ends of both shafts. an elongated cylindrical feature including an axial bore therein extending over a length configured to receive substantially coincident axes, and transmitting torque through the cylindrical feature of the coupling between the pair of shafts; means for keying an end of each shaft to the joint; and means for locking one of the pair of shafts over a relatively short distance along the length of the joint at a point remote from the end of the shaft; fulcrum means for gripping the hole in said cylindrical body.

spaced apart from said fulcrum means and substantially larger than the end of said one shaft so that said one shaft can tilt along its length about said fulcrum means of said joint; tilting the axis of the shaft to a position oblique to the axis of the cylindrical body of the joint, and changing the relative axial alignment between the two shafts with respect to the joint; , within the cylindrical body of the coupling and engaged with the end of the one shaft to adjust the one shaft to be fixed in a changed axis alignment position. A shaft joint is provided comprising means for forcing the end into said position oblique to the axis of the cylindrical body of said joint.

〔Example〕

The pump 1 shown in the drawings is a centrifugal pump, which is referred to in the industry as a vertical row pump.

The pump 1 typically comprises a casing 6 with an inlet and an outlet 8 adapted to be connected to spaced ends of a conduit (not shown) supporting the pump 1. The pump 1 is conventional and includes a centrifugal impeller 9 rotating in a pump chamber 10 connected to an inlet lower and an outlet 8 . The pump impeller 9 is mounted at the lower end of a shaft 11 extending vertically upward from the impeller 9 and supported in a bushing 12 and a seal 13 mounted within the pump casing 6.

The pump 1 is driven by a drive device such as an electric motor 15 mounted with a shaft 16 extending vertically downwardly in line with the pump shaft 11 . It should be appreciated that the drive means may be another type of five-wheel drive, such as a steam turbine, and that the invention is not driven by any particular type of drive means. The electric motor 15 has shaft 1
Surround 6.

An end plate 17 is attached to a support frame 20 placed between the pump 1 and the electric motor 15. In the support frame 20.

Several vertical legs 2 extending between the head ring 22 and the bottom width 25
There is 1. The bottom width 25 of the support frame 20 rests on and is bolted to the casing 6 of the pump l, and the head @
22 is bolted to the end plate 17 of the motorized Jfi 15 and is intended to thereby hold the two shafts 11 and 16 in alignment in a single rigid motorized! 13, Support frame 2
0 and pump l are integrated.

The two fiIll and 16 are interconnected by a joint 2 which is an embodiment of the present invention. Fitting 25 has an elongated cylindrical shape (also represented by two arms) with a hole 26 extending between an upper end 27 and a lower end 28.

The fitting 25 is axially divided into a pair of two semicircular halves 50, each half being at each end of the fitting when installed;
They are held together by a port 1 extending between the halves 29 and 30 as shown in FIG. two halves 29 and 5
0 is clamped together around the ends of the pump and motor shafts 11 and 16 to transfer the driving torque from the motor 15 to the pump 1.
The two shafts are interconnected together to transmit the information.

Both shafts 11 and 16 are keyed to the joint 25 by a key 32 in the usual manner. The motor shaft 16 has an annular groove near its lower end that fits into a corresponding internal annular groove in the joint 25 that axially fixes the shaft 16 therein. One of the ring segments 35 is secured in place in the joint 25 by a screw 311 that follows a hole in the joint half 50 and screws into the corresponding ring segment 33.

The shaft extension 36 is secured by a threaded portion 57 of the long section 6 which is received in a corresponding threaded hole in the end of the shaft 11. A washer 38 is mounted between the shaft extension 6 and the shaft 11 and a threaded portion 57 of the shaft extension 6 extends through the washer 38. The washer 38 is larger than the shaft 11 and is received in an internal groove formed in the joint 25, so that the ring segment 5 and the shaft 16 of the pump are secured axially in the joint 25 in the same way as the washer 38 is larger than the shaft 11 and is received in an internal groove formed in the joint 25. 11 is axially fixed in a joint 25. The upper end or outer end of the shaft extension part 56 is the shaft extension part 36
A wrench-engaging flat is formed so that a wrench can be used to screw the shaft 11 into place on the end of the shaft 11. The washer 38 is held in place by a screw IIO that extends through a hole in the fitting half 30 and threads around the periphery of the washer 58.

The bore 26 of the coupling 25 is enlarged in the middle of its length so as to form a chamber II5 receiving the shaft extension 36. The majority of the shaft extension 36 is placed within the chamber 11, and the shaft is spaced from the wall of the chamber 1i5 so that it can be moved laterally.

The remainder of the shaft 11 and the shaft extension 36 are held by the joint 2 over a relatively small length of the joint 25 so that the shaft 11
and the small part of the joint 25 holding the shaft length 36, when the upper end of the shaft extension 36 is moved laterally within the chamber 1i3, the shaft 11
and serves as a fulcrum on which the shaft extension 36 can pivot. By moving the shaft extension 56 in the chamber l13, the alignment of the shaft 11 with respect to the joint 25 can be changed.

After the adjustment is completed, move the shaft extension 56 within the chamber 115! 111 Means are provided for fixing the foreman section 5G in place. As shown in FIG. 4, four headless adjusting screws l111, similar to set screws, are arranged in the wall of the joint 25 at an angle of 9♂ with respect to each other around the axial length 56. screw in 1
It is. Each screw 1111 has an outer end configured to be engaged by a rotating tool, such as an Allen wrench, and an inner end provided with a pad 115 that engages the outside of the shaft extension 6. Since each pad 115 is υ larger than the threaded portion of the screw 1lII, it must be inserted into the threaded hole of the joint 25 from inside the joint 25 before the screw 111 is installed around the shafts 11 and 16. By making the pad 115 larger than the threaded hole, the screw 111 is in use.

Prevents screws from accidentally slipping back out of threaded holes in the event that the screw becomes loose, which is not expected to occur and may occur under unusual and unexpected circumstances.

The screw 1111 is used to adjust the relative position of the shaft extension 36 and the shaft 11 connected thereto in the chamber II3.

After installing the joint 25 on the shaft, use the shaft 1 to align the shaft.
1 t! It should be seen that adjustments can be made to 1B16. Note that the screw ll11 serves to fix the shaft 11 in a position relative to the coupling 25 during the subsequent operation of the pump 1 and the electric motor 15.

The screws 31+ are used to hold the fitting half 50 in place on the shaft 16 during assembly of the fitting, and the screws 40 are used to hold the fitting half 50 in place on the shaft 16 while assembling the fitting.
0 is held on the shaft 11 during assembly. What do the screws 511 and 110 do during assembly and disassembly of the fitting 25? It only works, but stays in place during operation of the fitting.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a centrifugal pump installed in a pipeline, with the driven shaft extending vertically upwards, and the motor mounted above the pump being supported above the pump body. The drive shaft of the pump extends vertically downward in line with the axis of the pump shaft, and Figure 2 shows a section cut away to show details of the connection between the joint and the shaft. FIG. 5 is a cross-sectional view taken along line -5 in FIG. 2; FIG. 4 is a cross-sectional view taken along line 4--4 in FIG. FIG. 11.16--shaft, 25--one joint, one cylindrical body. 26--hole, 6-uniaxial extension, 57--threaded portion, III--thread, 115--pad.

Claims (1)

[Claims] 1. A joint for interconnecting a pair of axially aligned shafts to transmit torque from one shaft to the other, wherein adjacent ends of both shafts an elongated cylindrical feature including an axial bore therein extending over a length configured to substantially axially receive a torque between said pair of shafts through said cylindrical feature of said joint; means for keying an end of each shaft for transmitting a signal, the means being on said joint and keying one of said pair of shafts over a relatively short distance along the length of said shaft at a point remote from said end; fulcrum means for firmly gripping the cylindrical body, the hole in the cylindrical body being spaced from the fulcrum means and substantially larger than the end of the one shaft, such that the one shaft is the fulcrum of the joint. means can be tilted along a length about the means, such that the axis of said one axis can be tilted in a position oblique to the axis of the cylindrical body of the fitting, and said one axis relative to the fitting; within the cylindrical body of the coupling for adjusting the relative axial alignment between the two shafts and fixing one shaft in the changed axial alignment position; A shaft coupling comprising means for engaging an end of the shaft of the shaft and forcing said end of said one shaft into said position inclined relative to the axis of the cylindrical body of said joint. 2. The cylindrical body of the joint is divided into a pair of semi-circular halves along the axis, and the pair of halves are aligned around respective portions of a pair of axially aligned axes. The shaft joint according to claim 1, further comprising a fixing means for tightening the shaft joint. 3. the cylindrical shape of the coupling at a location spaced about said one shaft, said means for engaging said one shaft end and forcing said one shaft end into an axially adjusted position; 3. A shaft coupling according to claim 2, further characterized in that it includes several screws screwed into the shaft and having means at their ends for engaging said one shaft. 4. further characterized in that the means on the end of the screw are larger than the threaded hole receiving the screw, thereby preventing the screw from fully backing out of the threaded hole during operation of the coupling. The shaft joint according to claim 2. 5. Further characterized in that the one shaft includes a shaft extension removably attached to one end thereof and extending into the enlarged portion of the hole, and an adjustment screw engages the shaft extension. The shaft joint according to claim 4.