JPH10325419A - Elastic shaft coupling of rotary shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate any assembly/disassembly by providing the plural steps of elastic shaft couplings parallelly in a rotation axis direction and connecting the driven side disc of each step with the drive side disc of next step, drive side disc of a first step with the output end of a drive machine and the driven side disc of a final step with the input end of a driven machine attachably/ detachably. SOLUTION: A first step drive side disc 13 and auxiliary disc 14 are fastened to a flywheel 11 attachably/detachably by plural tightening bolts 16 and a first step driven side disc 21 is held between the discs 13, 14 by a bolt 15. A second step drive side disc 23 and second step auxiliary disc 24 are also fastened to the disc 21 attachably/detachably and the second driven side disc 31 is held and the disk 31 is fastened attachably/detachably to an input shaft 30 through a connection shaft 32. In the first and second step spring mechanisms 200, 201, a silicon oil along with respective two rows are stored in the empty places 60, 65 partitioned and formed by plural pieces on respective discs and an attenuation operation is generated. The assembly, installation and disassembly can be performed simply by above tandem structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic shaft coupling used for a shaft coupling between an engine and a propeller shaft system, a shaft coupling between an engine and a generator or an engine and a reciprocating compressor in a ship.

[0002]

2. Description of the Related Art An engine-propeller shaft drive system in a ship, and a power transmission system for driving a generator and a reciprocating compressor by the engine, are provided with a shaft coupling portion in order to suppress torsional vibration of the shaft system due to the excitation force from the engine. An elastic shaft coupling having a vibration damping function is used.

FIG. 4 is a schematic structural view showing a propeller drive system of a ship in which a propeller is driven by an engine.
In the figure, 100 is an engine, 105 is a propeller, and the power of the engine 100 is transmitted through a shaft coupling 101, a propeller intermediate shaft 103 and a propeller shaft 104.
05 and drives it.

In the marine propeller drive system as described above, the lengths of the propeller intermediate shaft 103 and the propeller shaft 104 between the engine 100 and the propeller 105 are increased to reduce the natural frequency of the propeller drive shaft system. The occurrence of system resonance is avoided. In addition to the above-described means for making the propeller shaft system a long axis, many means for reducing the torsional vibration and impact by adopting an elastic shaft joint as the shaft joint 101 have been proposed.

FIGS. 5 and 6 show a technique provided in Japanese Patent Publication No. 59-43647 of the shaft coupling 101 in such a marine propeller drive system. FIG. 5 is a sectional view taken along an elastic rotation axis. FIG. 6 is an enlarged view taken along the line ZZ in FIG. 5.

In FIG. 5, reference numeral 010 denotes an output shaft of a driving machine (engine) such as a crankshaft of the engine 100;
Is a drive side disk fixed to the output shaft 010 via a key 012, and 020 is a propeller intermediate shaft 103 shown in FIG.
Reference numeral 021 denotes a driven disk fixed to the input shaft 020 via a key 038, and 014 denotes an auxiliary disk fixed to the driving disk 011 by bolts 015.

In FIG. 6, reference numeral 031 denotes a coil spring, one end of which is supported by a drive-side spring receiver 032 and the other end of which is supported by a driven-side spring receiver 033. The back surface of the drive-side spring receiver 032 is in contact with the support surface 041 of the drive-side disk 011 and the auxiliary disk 014, and the back surface of the driven-side spring support 033 is in contact with the support surface 042 of the driven-side disk 021. And the coil spring 031,
A spring mechanism composed of the drive-side spring receiver 032 and the driven-side spring receiver 033 has a plurality of cavities 040 formed at equal intervals along the outer circumference of the drive-side disk 011, the driven-side disk 21 and the auxiliary disk 014. Housed within.

During operation of the conventional marine propeller drive system equipped with the elastic shaft coupling, the rotational force (power) from the engine 100 is subjected to torsional vibration, impact, etc., at the shaft coupling 101, and then to the propeller intermediate shaft. 103 and propeller shaft 1
The signal is transmitted to the propeller 105 via the drive unit 04 and is driven.

Here, torsional vibration is generated by the excitation force from the engine 100, and this torsional vibration causes the engine 10
When the drive side disk 011 directly connected to the output shaft 010 is displaced in the direction of the arrow Y in FIG.
The flexure of 1 absorbs the displacement caused by the vibration. As a result, vibration and impact from the drive side directly connected to the engine 100 are reduced by the elastic shaft coupling provided with the coil spring 031.

[0010]

As described above, in a marine propeller drive system, the engine 100 and the propeller 10
5 and a propeller shaft system (propeller intermediate shaft 103,
The axial length of the propeller shaft 104) tends to be extremely long in order to reduce the natural frequency so as to avoid resonance with the engine excitation force. Elongation of the propeller shaft system as described above causes a reduction in the loading capacity of the ship. Therefore, in order to address such a problem, an elastic shaft coupling as shown in FIGS. 5 and 6 is adopted. Means have been proposed for suppressing an increase in the length of the axis and reducing the torsional vibration of the shaft system.

However, in such a conventional elastic shaft coupling, since the amount of deflection of the coil spring 031 is restricted by the strength, the range of the used spring constant is restricted, and it is particularly difficult to reduce the spring constant. Therefore, it is difficult to obtain a sufficient vibration suppression effect corresponding to a wide range of torsional vibration. Further, when attaching such a conventional elastic shaft coupling, the drive side disk 011 is attached to the output shaft 010 by the key 012.
It is necessary to fix the driven disk 021 via the input shaft 020 via the key 038 before mounting the vibration damping member of the shaft coupling, which increases the man-hour for assembly and increases the cost. There is a problem.

In view of the above-mentioned problems in the prior art, the present invention expands the range of usable spring constants of a spring mechanism for vibration damping, enables a wide range of damping of torsional vibration, and assembles, disassembles, and controls an engine and the like. An object of the present invention is to provide an elastic coupling of a rotating shaft that can be easily attached to and removed from a machine.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned technical problems, the present invention provides a method in which a plurality of vacant spaces are formed along a circumferential direction of both disks by forming a partition by a driving disk and a driven disk. A spring-type elastic shaft coupling configured to house a spring mechanism having a spring that expands and contracts by a relative displacement in the circumferential direction of the drive-side disk and the driven-side disk and a spring receiver that supports both ends of the spring is rotated. A plurality of (a plurality of stages) are juxtaposed in the axial direction of the shaft, and the driven disk at each stage and the drive disk at the next stage are detachably connected to each other to form a tandem-type connection mode. Is detachably connected to the output end of a driving machine such as an engine, and the driven disk at the last stage is detachably connected to the input end of the driven machine rotating shaft such as a propeller shaft or a rotating shaft of a generator. It was proposed the elastic coupling of the rotating shaft, wherein.

According to this invention, the rotational force accompanying the torsional vibration from the driving machine such as the engine is attenuated by the first-stage spring mechanism, and then the second and subsequent stages are connected by the tandem structure. And is transmitted to the driven machine.

In the power transmission process, in the present invention, a plurality of (multi-stage) tandem structures are connected to a plurality of (multi-stage) tandem spring-type elastic joints each including a drive-side disk and a driven-side disk incorporating a spring mechanism. The restriction on the strength of the spring in each stage can be expanded, and a spring characteristic with a low spring constant can be obtained, whereby the resonance point of torsional vibration can be sufficiently moved out of the use range, and this can be avoided. Therefore, a combination of springs can be selected in a wide range, and a wide range of torsional vibration can be attenuated. Further, since the spring supports of the spring mechanisms of each stage also have a bearing function, the above-described low spring constant can be achieved with a simple tandem structure.

Furthermore, a tandem spring-type elastic shaft coupling can be assembled for each unit at an arbitrary place, and can be mounted on driven shafts such as a shaft of a driving machine such as an engine, a shaft of a generator, and a propeller shaft. It is easy to assemble and mount, and the number of assembling and mounting steps is reduced. Further, in addition to the above-mentioned invention, the present invention also includes that a viscous fluid such as silicone oil is sealed in each of the cavities.

According to this invention, the torsional vibration can be further reduced by the vibration damping effect of the viscous friction of the viscous fluid such as silicon oil, and it is particularly useful for suppressing the transient resonance response when the engine is started and stopped. Has an effect. More preferably, two springs are provided in parallel in each of the cavities.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. It's just

The present invention relates to an improvement of the shaft coupling 101 shown in FIG. 4. FIG. 1 is a sectional view taken along the axis of the shaft coupling of the propeller shaft drive system of a ship shown in FIG. 4, and FIG. Of B
FIG. 3 is an enlarged view of a spring mechanism as viewed in a direction indicated by an arrow B. FIG.

1 and 2, reference numeral 10 denotes an output shaft such as an engine crankshaft, and 30 denotes an intermediate propeller shaft 103.
An input shaft 11 (see FIG. 4) is a flyhole fastened to the output shaft 10 by bolts 12. Reference numeral 13 denotes a first-stage drive disk, and reference numeral 14 denotes a first-stage auxiliary disk. The first-stage drive disk 13 and the auxiliary disk 14 are provided with a plurality of tightening bolts 16 arranged at equal intervals along the circumferential direction.
Thus, it is detachably fastened to the fly hole 11. Reference numeral 21 denotes a first stage driven side disk,
Reference numeral 1 is sandwiched between the first-stage drive side disk 13 and the first-stage auxiliary disk 14 by bolts 15 arranged at equal intervals in the circumferential direction.

Reference numeral 23 denotes a second-stage drive disk, and 24 denotes a second-stage auxiliary disk. The second-stage drive disk 23 and the second-stage auxiliary disk 24 are arranged at equal intervals along the circumferential direction. After being assembled by the plurality of tightening bolts 25, the inner peripheral end thereof is removably fastened to the first stage driven side disk 21 by the plurality of tightening bolts 26. 3
Reference numeral 1 denotes a second-stage driven disk, which is detachably fastened to the connecting shaft 32 by bolts 27 arranged at equal intervals in the inner circumferential direction. The rear end flange portion of the connection shaft 32 is provided with bolts 34 arranged at equal intervals in the circumferential direction via a spacer 33.
And, it is detachably fastened to the input shaft 30 of the propeller intermediate shaft 103 by a reamer bolt 39 for positioning.

1 to 3, reference numeral 200 denotes a first-stage spring mechanism, and 201 denotes a second-stage spring mechanism. The first-stage and second-stage spring mechanisms 200 and 201 correspond to FIG.
As shown in FIG.
23, the first and second stage auxiliary disks 14 and 24 and the first and second stage driven disks 21 and 31 are formed in a plurality of cavities 60 and 65 each having an oval cross section and formed at equal intervals in the circumferential direction. It is stored. First and second stage spring mechanism 2
As shown in FIG. 1, 00 and 201 are provided in two rows in the cavities 60 and 65, respectively.

In FIG. 3 showing the details of the first-stage and second-stage spring mechanisms, FIG.
Is constituted by first-stage coil springs 41a and 41b, a first-stage drive-side spring receiver 42 supporting both ends of the coil springs 41a and 41b, and a first-stage driven-side spring receiver 43. Further, the second-stage spring mechanism 201 includes second-stage coil springs 51a and 51b,
It is constituted by the second and second stage driven side spring supports 53.

The first-stage coil springs 41a and 41b of the first-stage spring mechanism 200 and the second-stage coil springs 51a and 51b of the second-stage spring mechanism 201
b are arranged in parallel as described above (see FIG. 1). Also, the first-stage coil springs 41a and 41b
Is supported by a first-stage drive-side spring receiver 42, and the other end is supported by a first-stage driven-side spring receiver 43. One ends of the second-stage coil springs 51a and 51b are supported by a second-stage drive-side spring support 52, and the other ends are supported by a second-stage driven-side spring support 53.

The arc-shaped rear surface 42a of the first-stage drive-side spring receiver 42 is provided with a first-stage arc-shaped support surface 45 provided on the first-stage drive-side disk 13 and the first-stage auxiliary disk 14.
And the arc-shaped rear surface 43a of the first-stage driven-side spring receiver 43
Abuts against an arc-shaped support surface 46 formed on the first driven side disk 21.

The arc-shaped back surface 52a of the second-stage drive-side spring receiver 52 abuts on a second-stage arc-shaped support surface 55 provided on the second-stage drive-side disk 23 and the second-stage auxiliary disk 24, The arc-shaped back surface 53a of the second-stage driven-side spring support 53 is formed by an arc-shaped support surface 5 provided on the second-stage driven-side disk 31.
6 abuts.

The first and second stage spring mechanisms 20
The voids 60 and 65 in which 0 and 201 are stored are filled with silicone oil 70. The silicone oil 70
Are also guided to the gaps 61 and 66 between the first and second stage drive side disks 13 and 23 and the first and second stage auxiliary disks 14 and 24 and the first and second stage driven side disks 21 and 31,
Due to the relative amplitude caused by the vibration of the disk, damping action is caused on the side surfaces and circumferential surfaces of the gaps 61 and 66.

Reference numerals 36, 37, and 38 denote the first-stage voids 60, respectively.
An O-ring 87 for sealing and sealing the silicone oil in the gap 61; a cover 87 for locking the O-rings 37 and 38 to the side surface of the first-stage auxiliary disk 14;
85 is a bolt for fastening the cover 87. Also, 4
Reference numerals 6, 47, and 48 denote O-rings for sealing and sealing the silicone oil in the second-stage voids 65 and the gaps 66. Reference numeral 97 denotes a side surface of the second-stage auxiliary disk 24 for the O-rings 47 and 48. A cover 86 for locking the cover 97 is a bolt for fastening the cover 97.

Reference numerals 35a and 35b denote side seals for preventing silicon oil from leaking in the circumferential direction in the first space 60 and the gap 61, and 45a and 45b indicate side seals 65 and the gap in the second space 65. 66 is a side seal for preventing the silicone oil in 66 from leaking in the circumferential direction. As shown in FIG. 1, the covers 87 and 97 cover the first and second cavities 60 and 65, and by removing them, the silicone oil 70 in the vacancies 60 and 65 is injected or removed. Can be discharged.

When the elastic coupling having such a configuration is used, the first-stage drive-side disc 13 of the first-stage spring mechanism 200 is displaced, for example, in the direction of the arrow X in FIG. 3 due to the driving torque and the torsional vibration torque from the engine 100. At this time, the first-stage drive-side spring receiver 42 is pushed forward via the disk support surface 45 to be driven-side spring receiver 43.
And the first-stage coil spring 41
a and 41b are compressed. The vibration is applied to the first-stage coil springs 41a and 41a of the first-stage spring mechanism 200.
1b, the space 60 and the gap 61
It is further attenuated by the viscous friction of the silicone oil 70 enclosed therein.

The torsional vibration torque, the amplitude of which has been attenuated by the above-described vibration damping action of the first-stage spring mechanism 200 and the silicon oil 70, is applied to the first-stage driven disk 2
The power is transmitted from the first to the second stage drive side disk 23. Then, the same damping action as in the first stage is performed by the second stage spring mechanism 201 and the silicon oil 70 in the cavity 65 and the gap 66 from the vibration torque second stage drive side disk 23, and the connecting shaft 32 is moved. Then, it is transmitted to the input shaft 30 of the propeller intermediate shaft.

The torsional vibration from the engine 100 is sufficiently attenuated by the vibration damping effect of the cooperative operation of the coil springs 41a, 41b, 51a, 51b and the silicone oil 70 in the first and second stages. It is transmitted to the propeller shaft system.

When assembling the tandem-structured elastic coupling constructed as described above, first, the first-stage drive disk 13 and the first-stage auxiliary disk 14 are set at an arbitrary place such as a factory.
And the first-stage driven-side disc 21 having the side seals 35a and 35b incorporated therein and the O-ring 36,
In this state, the first-stage drive disk 13 and the first-stage auxiliary disk 14 are tightened by bolts 15. After assembling the first-stage drive-side disc 13 and the first-stage driven-side disc 21, the first-stage spring mechanism 200 is housed in the space 60 having an oval cross section, and then the silicone oil 70 is injected. After the silicone oil 70 is injected, a cover 8 for sealing is used.
7 is fastened to the first-stage auxiliary disc 14 with the bolts 85 while the O-rings 37 and 38 are fitted. Thereby, the assembly of the first-stage spring-type elastic joint is completed.

Next, the second-stage drive disk 23 is fastened to the first-stage spring-type elastic joint by bolts 26, and then the second-stage driven disk 31 having the side seals 45a and 45b incorporated therein is replaced with the second-stage drive disk. 23 and the second-stage auxiliary disc 24 are inserted and attached. Further, a second-stage spring mechanism 2 is provided in the second-stage space 65 having an oval cross section.
After storing 01, silicone oil 70 is injected. After the silicone oil 70 is injected, the sealing cover 97 is attached to the second auxiliary disk 2 with the O-rings 47 and 48 fitted.
4 is tightened with a bolt 86. Next, the connecting shaft 32 is attached to the second-stage driven-side disk 31 with the bolt 27, and the assembly of the tandem-structured spring-type elastic shaft coupling is completed.

When the tandem-structure spring-type elastic coupling is mounted on the engine 100 side, the first-stage drive-side disc is attached to the flywheel 11 fastened to the output end 10 of the engine which is coaxially mounted at a predetermined interval. 1
The third and first-stage auxiliary discs 14 are fastened and fastened by bolts 16, the spacer 33 is sandwiched between the input shafts 30 of the propeller intermediate shaft 103, the bolts 34 and the reamer bolts 39 for positioning are loosened, and the spacers 33 are removed. The elastic shaft coupling is removed without moving the propeller intermediate shaft 103 in the axial direction.

As described above, the elastic shaft coupling according to the embodiment of the present invention includes the insides of the cavities 60, 65 accommodating the spring mechanisms 200, 201, and the driving side disks 13, 2.
3 and the auxiliary disks 14, 24 and the driven disk 2
By forming a spring type elastic joint in which a silicone oil 70 is sealed in a gap between the first and second stages and a tandem structure in which two or more stages of the first and second stages are provided, the strength of the springs 41a, 41b, 51a and 51b is reduced. The constraint can be expanded, and a characteristic with a low spring constant can be obtained. This makes it possible to sufficiently avoid the torsional vibration resonance point of the shaft system out of the use range.

The spring mechanisms 200, 201
Silicone oil 70 in the vacancies 60, 65 containing
Can be damped by viscous friction of the silicone oil, and the passage response at the resonance point when the engine is started and stopped can be suppressed. The first-stage and second-stage spring mechanisms 200 and 201 include a drive-side spring receiver 42,
Since the bearing 52 and the passive-side spring bearings 43 and 53 have a structure that also serves as a bearing, the spring constant can be reduced with a simple tandem structure.

Further, such a tandem spring-type elastic shaft coupling is previously assembled at an arbitrary place, and is fastened to the output shaft 10 of a driving machine such as the engine 100 with the bolts 12, and the second-stage driven side disk 31 is provided. Can be fastened to the input shaft 30 of the rotating shaft on the driven side such as the propeller intermediate shaft 103 by the bolts 34 and 39, so that assembly and attachment to the engine (drive machine) can be easily performed.

[0039]

As described above, according to the present invention, a plurality of (multi-stage) tandem spring type elastic shaft couplings comprising a driving disk, a driven disk, and a driven disk incorporating a spring mechanism are connected. Therefore, the restriction on the strength of the spring at each stage can be expanded, and the spring characteristics with a low spring constant can be obtained, whereby the resonance point of torsional vibration can be sufficiently moved out of the use range to avoid this. Can be. Therefore, a wide range of spring combinations can be selected, and a wide range of torsional vibration attenuation can be achieved.

Also, since the tandem spring-type elastic coupling can be assembled independently for each unit and attached to a driving machine and a driven machine, assembly and installation are easy, the number of steps is reduced, and low-cost elasticity is achieved. A shaft coupling is obtained.
Further, according to the second aspect, the vibration damping effect of viscous friction of a viscous fluid such as silicon oil causes
It is possible to further reduce torsional vibration, and it is particularly effective in suppressing a transient resonance response when the engine is started and stopped.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an elastic shaft coupling according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view taken along the line BB of FIG.

FIG. 3 is an enlarged structural view of a spring mechanism in the embodiment.

FIG. 4 is a side view showing a propeller shaft system for a ship.

FIG. 5 is a longitudinal sectional view of a conventional elastic shaft coupling.

6 is a view taken in the direction of arrows ZZ in FIG. 5;

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 output shaft 11 fly hole 13 first-stage drive disk 14 first-stage auxiliary disk 21 first-stage driven disk 23 second-stage drive disk 24 second-stage auxiliary disk 30 input shaft 31 second-stage driven disk 32 connecting shaft 41a , 41b First-stage coil springs 51a, 51b Second-stage coil springs 42 First-stage drive-side spring receivers 52 Second-stage drive-side spring receivers 43 First-stage driven-side spring receivers 53 Second-stage driven-side spring receivers 60 65 Empty space (second stage) 100 Engine 101 Shaft coupling (elastic shaft coupling) 103 Propeller intermediate shaft 200 First stage spring mechanism 201 Second stage spring mechanism

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Fumio Iwata Inventor 5-3 Akunouracho, Nagasaki-shi West Japan Ryoju Kosan Co., Ltd.

Claims (3)

[Claims] 1. A drive system according to claim 1, wherein said drive disk and said driven disk are separated from each other in a plurality of cavities formed in a circumferential direction of said disks. A plurality of (multiple stages) spring-type elastic shaft joints each configured to house a spring mechanism having a spring that expands and contracts by a spring and a spring receiver that supports both ends of the spring are arranged in the axial direction of rotation. The driven disk and the next drive disk are detachably connected to each other to form a tandem structure, and the first drive disk is detachably connected to the output end of a drive machine such as an engine. An elastic shaft coupling for a rotating shaft, wherein a driven disk of the step is detachably connected to an input end of a driven machine rotating shaft such as a propeller shaft or a rotating shaft of a generator. 2. The elastic joint of a rotary shaft according to claim 1, wherein a viscous fluid such as silicone oil is sealed in each of said cavities. 3. The elastic joint of a rotary shaft according to claim 1, wherein two of said spring mechanisms are provided in parallel in each of said cavities.