JPH01237292A - Device for supporting power transmission device - Google Patents

Abstract

PURPOSE:To remove the chattering zone in a working rotation zone and enlarge the continuously operating range of the working rotation zone by forming the supporting device of a power transmission device which can accurately restrict an opposite moment generated in a planetary gear device at the time of power transmission. CONSTITUTION:An input shift 6 is connected to a propeller shaft 7 through a planetary gear device 8 and a thrust bearing block 9 is installed midway on the input shaft 6. The planetary gear device 8 is to deceleratingly transmit the power of an output source 1 to a propeller 4, being rotatably supported on a ship bottom 10 via a bearing 11. Brackets 22 for installing cylinders are extended from both sides of the housing 13 of the planetary gear device and positioned in the recessed portions 231 of frames 23. Each pair of upper and lower hydraulic rams 24-27 are formed on each of the frames 23, while forming each pair of right and left hydraulic rams 24, 27 and hydraulic ram 25, 26 being mutually crossingly paired in a closed circuit. An oil pressure force is transmitted to oil pressure pipes for connecting each ram in such a way that the loads applied to the right and left hydraulic rams are always balanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a support device for a power transmission device, and particularly to a planetary gear that decelerates and transmits power when transmitting power from an output source to a propulsion device. The present invention relates to a support device for a power transmission device that is capable of regulating a reaction moment generated in a planetary gear device during power transmission using a reaction force generated by hydraulic pressure in a power transmission device supported by a power transmission device.

[Prior Art] Generally, in a ship, a propulsion device 3 is used as shown in FIG.
The power for driving the propeller 4 is transmitted from the engine 2, which is the output source 1, to the propulsion shaft system 5 including a gear system.
The signal is transmitted to the propulsion unit 3 via.

In such a propulsion shaft system 5 including the gear device 8,
As shown in Fig. 6, the rotation range A (referred to as the chattering range) where the torsional vibration torque B is larger than the average torque C of the shaft.
occurs during the operating rotation range.

In this chattering region, a tooth-beating phenomenon occurs in the gear, which is unfavorable for the f& vehicle.

Therefore, continuous use of the shaft system for power transmission in this chattering region is unavoidably prohibited.

Normally, in order to avoid the above-mentioned tooth striking phenomenon, a highly elastic joint is used between the gear and the main engine, the chattering range is moved to a low rotation range that does not pose a problem in use, and the torsional vibration torque is attenuated by damping of the joint. ing.

[Problem to be solved by the invention] However, high elastic joints for high output and low speed rotation are extremely expensive and bulky, and accordingly, the bearings of the output shaft and input shaft on the engine side are also large. Become something.

The present invention was devised in view of these problems in the prior art and to solve them. It is an object of the present invention to provide a support device for a power transmission device that is inexpensive and equipped with a means that does not take up a large amount of space and can accurately regulate the reaction moment generated in the power transmission device.

[Means for Solving the Problems] In order to achieve the above object, the present invention is provided in a propulsion shaft system that connects an output source and a propulsion device, and is separated from a fixed system such as a double bottom of a ship's hull. a planetary gear device for decelerating and transmitting power from a power source to a propulsion device; a pedestal that stands up from the fixed system with the planetary gear device in between; It has a bracket extending from the gear device toward the pedestal, and engages a hydraulic ram from the tip of the bracket vertically facing the pedestal, and the upper and lower hydraulic rams of one pedestal are connected to the other hydraulic ram. The system includes a planetary gear device supporting means in which the upper and lower hydraulic rams of the mount are alternately connected by hydraulic piping, and a pressure adjusting means provided in the hydraulic piping of the supporting means.

[Function] A planetary gear system in which the upper and lower hydraulic rams of the left and right mounts are alternately connected by hydraulic piping! The support means uses hydraulic pressure to cancel out the reaction moment of the planetary gear system that occurs in the operating rotation range, and when the rotation speed of the propulsion shaft system approaches the rotation speed in the chattering range within the operating rotation range, the pressure is adjusted. The means is actuated to move the resonance point of the chattering range to the unused rotation range, thereby widening the range of continuous operation within the used rotation range.

[Example] A preferred embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 2 shows an outline of a support device for a marine power transmission device.

As shown in the figure, an engine 2 serving as an output source 1 and a propulsion device 3
The propellers 4 are connected to each other via a propulsion shaft system 5.

The propulsion shaft system 5 mainly includes an input shaft 6 located on its input side and a propeller shaft 7 located on its output side.

The input shaft 6 and propeller shaft 7 are linked by a planetary gear device 8, and a thrust bearing block 9 is interposed in the middle of the input shaft 6.

The planetary gear device 8 reduces the power of the output source 1 and propels the propeller 4.
1, and is rotatably supported via a bearing 11 at 1° of the bottom of the ship.

3 and 4 show an embodiment of the planetary gear system 8,
Housing 1 housing gear 12 in both embodiments
3 is supported by the ship bottom 10 via a bearing 11, but the mounting position of the internal gear 14 and the pivot position of the planetary gear 15 are different.

That is, in FIG. 3, the internal gear 14 is fixed to the outer periphery of the flange 16 of the propeller shaft 7, and the internal gear 14 is fixed to the outer circumference of the flange 16 of the propeller shaft 7, and
is fixed to the side wall of the housing 13, whereas in FIG. There is.

In either embodiment, the housing 13 is rotatably supported by the propeller shaft 7 via a bearing 18, and has boss portions 19 surrounding the propeller shaft 7 at both ends of the housing 13 and the input shaft 6. Seals 21 are provided on the end faces of the boss portions 20, respectively.

As shown in FIG. 5, cylinder mounting brackets 22 extend from both sides of the housing 13, and these brackets 22 are raised from the bottom 10 of the fixed system so as to sandwich the housing 13 between them. I am facing 231.

Then, from the tip of each bracket 22, the recess 23
Hydraulic rams 24, 25 and 26.
27 is engaged.

The upper and lower hydraulic rams 24 and 25 of one of these pedestals 23 are as follows:
As shown in FIG. 1, the upper and lower hydraulic rams 26 and 27 of the other pedestal 23 are alternately connected to each other by hydraulic pipes 28 and 29.

That is, a pair of upper and lower hydraulic rams 24.
25, 26, and 27 are formed, and a pair of left and right hydraulic rams 2 are crossed by a closed circuit to form a pair with each other.
4.27 and hydraulic rams 25°26 are formed. Therefore, hydraulic pressure is always transmitted to each hydraulic pipe 28, 29 so that the loads applied to the left and right hydraulic rams 24, 27 and 25, 26 are balanced.

Specifically, one of the hydraulic pipes 28 connects the cylinders 242, 272 corresponding to the head sides of the pistons 241° 271 of the alternate hydraulic rams 24, 27, and the other two hydraulic pipes similarly connect the pistons 251. The head-side cylinders 252 and 262 of the cylinder 261 are connected, and each hydraulic pipe 28 and 29 is connected to a high-pressure oil supply line through a switching valve 30 with a check valve that operates in response to forward and reverse rotation of the housing 13. 31, and each hydraulic pipe 2
Auxiliary cylinders 33 serving as pressure regulating means are connected to the cylinders 8 and 29 through electromagnetic valves 32, respectively.

On the other hand, a low pressure oil supply line 35 is connected to the skirt side of the piston 241, 251, 261, 271 of each cylinder 242, 252, 262, 272 via a flow rate adjustment valve 34 with a deceleration check valve. ing.

Further, the low pressure oil supply line 35 system and the high pressure oil supply line 31 system are connected through a check valve 36, and are also connected through a safety valve 37 and a flow rate adjustment valve 38. ing.

Next, the operation of the present invention will be described.

In the housing torque support hydraulic circuit shown in Fig. 1,
When the solenoid valve 32 is “closed”, the housing 13 is closed to the cylinder 2.
It is supported by a spring constant K (determined from the compressibility of the oil) of 4 to 27. This spring constant can be determined by selecting the dimensions of the cylinders 24-27.
The supporting force can be selected to be equivalent to that obtained when fixing with installation bolts (not shown).

On the other hand, the torsional vibration model of this shaft system without a high elastic joint is, as shown in Fig. 7, a gear 121 connected to the main engine 2 by a shaft with a torsion spring constant of 1, and a shaft with a torsion spring constant of 2. gear 12 connected to propeller 4 at
The gear 123 is supported by adding an auxiliary cylinder 33 to the ram cylinders 24 to 27 with a spring constant and an auxiliary cylinder 33 with a spring constant. As shown in FIG. 8, gears 121 and 122 connected to the torsion spring constants + and 2 are arranged so as to directly mesh with each other, and a gear 123 of the housing 13 is placed on the side thereof. A planetary system of a system in which gears 123 are meshed and arranged in series, and the gear 123 is supported by adding an auxiliary cylinder 33 with a spring constant to the ram cylinders 24 to 27 with a spring constant as described above.
It can be displayed in any type.

When the solenoid valve 32 is "closed", its shaft system is rotated within the operating rotation range (for example, the operating rotation speed of the engine from 40 to 1), as shown in FIG.
00), which often causes a chattering region A indicated by diagonal lines in FIG. can. By selecting the spring constant k in the auxiliary cylinder 33 to an appropriate value, the spring constant of the torsional vibration system becomes 10K, and from the resonance point No. ) can be changed to the resonance point no. Further, by appropriately setting the flow rate regulating valve 34', it is possible to generate an appropriate braking force.

As a result, the chattering region A within the usable rotation range can be removed and the continuous operation range of the usable rotation range can be expanded.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are achieved.

(2) It is possible to provide a support device for a power transmission device that is inexpensive and includes a pressure adjustment means that does not take up much space and that accurately excludes the chattering region from the usable rotation range.

■ By providing a pressure pA adjustment means in the hydraulic piping that is the support means for the planetary gear system, the pressure adjustment means can be operated in the chattering region where the vibration torque of the vibration system exceeds the average torque of the shaft system in the operating rotation range. By doing so, the peak of vibration torque can be moved to an inconvenient rotation range. In addition, the flow rate adjustment valve generates an appropriate braking force and suppresses the amplitude.

(2) Therefore, by operating the pressure regulating means, the range in which continuous use is prohibited can be excluded from the engine operating range, and the maneuverability of the ship can be improved.

[Brief explanation of the drawing]

Fig. 1 is a hydraulic circuit diagram of a hydraulic control device incorporated in a support device of a power transmission device of the present invention, Fig. 2 is an overall schematic side view showing the power transmission device according to the present invention, and Fig. 3 is the same power transmission device as above. FIG. 4 is an enlarged side view of a modified embodiment of the planetary gear device in FIG. 3, FIG. 5 is a sectional view taken along the line v-V in FIG. A graph showing the relationship between rotational speed and vibration torque, FIG. 7 is a star type torsional vibration model diagram of the shaft system, and FIG. 8 is a planetary type torsional vibration model diagram of the shaft system. In the figure, 1 is an output source, 3 is a propulsion device, 5 is a propulsion shaft system, 8 is a planetary gear system, 10 is a bottom (fixed system), 22 is a bracket, 23 is a frame, 24 to 27 are hydraulic rams, 28. 29 is a hydraulic pipe, and 33 is an auxiliary cylinder (pressure adjustment means). Patent applicant Haru Ishikawajima@Heavy Industries Co., Ltd. Representative patent attorney Nobuo Kinuya z1 Figure
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Claims (1)

[Claims] 1. A planetary gear device that is installed in a propulsion shaft system that connects the output source and the propulsion device, is separated from a fixed system such as a double bottom of the ship, and is used to decelerate and transmit power from the output source to the propulsion device; The device has a pedestal that stands up from the fixed system so as to sandwich the planetary gear device therebetween, and a pedestal that is provided on the planetary gear device, and a bracket that extends from the planetary gear device toward the pedestal. A planetary gear device in which hydraulic rams are engaged with the pedestal from the tip thereof facing each other vertically, and the upper and lower hydraulic rams of one pedestal and the upper and lower hydraulic rams of the other pedestal are alternately connected by hydraulic piping. A support device for a power transmission device, comprising a support means and a pressure adjustment means provided in a hydraulic piping of the support means.