JPS62244791A - Propulsive device - Google Patents

Abstract

PURPOSE:To enable the sailing to be continuously performed even in an emergency, by providing a power cutoff means between input and distribution output ends of a power distributing means, which distributively transmits power to a double contrarotating shaft, further forming at least one of the propellers to be driven in a variable pitch. CONSTITUTION:A power distributing means 10 distributively transmits input power respectively to an outer rotary shaft 4 of a double contrarotating shaft 3 and its inner rotary shaft 6, and between an input end 10c and distribution output ends 10a, 10b of said means 10, a power cutoff means 19 is provided to cut transmission of the power to either rotary shaft. In this way, secured seizure of a bearing 5 is generated, and even if the rotary shafts come to be unable to contrarotate to each other, the transmission of the power is continued by driving the other rotary shaft to be rotated. Further, of the pair of propellers 1, 2, which are constituted mutually in a reverse pitch generating propulsive force in the same direction being mutually reversed when the double contrarotating shaft 3 is normally driven, the propeller 1, if it provides a variable pitch mechanism 23, changes a pitch when the inner and outer rotary shafts are rotated in the same direction in an emergency, and propulsive force can be generated by the propellers 1, 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a propulsion lA system, and in particular has a pair of thrusters configured with opposite pitches, and a counter-rotating shaft is connected to the thrusters. It is driven by a propulsion mill that transmits power from the engine.

[Prior Art] Conventionally, aircraft such as helicopters, pumps, etc. are known to have counter-rotating blades, counter-rotating impellers, etc., and even in large ships etc., propulsion efficiency has been improved. There are concerns about installing counter-rotating propellers to improve energy efficiency and save energy.

As shown in Fig. 8, the propulsion device consists of counter-rotating propellers, and consists of a pair of fixed-pitch screw propulsion units installed coaxially at the stern a, stacked in series along the axial direction, and configured with mutually opposite pitches. Thrust is generated by rotating the cylinders and c in opposite directions.

In this case, a counter-rotating axis d is employed to drive these propulsors s, c coaxially and in opposite directions. This counter-rotating shaft d is constructed by inserting an inner rotating shaft f, which drives the other propeller, into a hollow outer rotating shaft e, which drives one propeller C, and transmits the power of the main engine 9. By transmitting in opposite directions to the respective rotation axes e and f via gear trains, etc.
The pair of thrusters A and C can be rotated at approximately the same rotational speed. A bearing i is interposed between the outer rotating shaft e and the inner rotating shaft f in order to ensure smooth reversal.

[Problems to be Solved by the Invention] By the way, by utilizing such counter-rotating axis d, a pair of fixed-pitch propulsors S, c, which are configured with opposite pitches to each other, can be constructed.
In a propulsion device that generates thrust by coaxially driving and rotating in opposite directions, a bearing i interposed between an outer rotating shaft e of a counter-rotating shaft d and an inner rotating shaft `` There was a risk that these two shafts e and f would become stuck due to seizure, etc. If bearing i were stuck in this way, the rotational axes e and f, which are opposite to each other, would restrict the rotation of the other. After that, the propeller is rotated by the contra-rotating axis d.

There was a problem in that the power could not be transmitted to C, making it impossible to continue sailing.

Here, in order to fix the bearing i in this way, the counter-rotating axis d
In an emergency, when it becomes impossible to reverse the rotating axes e and f, and power transmission through the counter-rotating shaft d becomes difficult, for example, the gear train that distributes power to the rotating axes e and f can be removed from the power transmission mechanism. It is conceivable that by doing so, it is possible to ensure that a small amount of power is transmitted to one of the rotating shafts and to continue sailing.

However, even in this case, due to the bearing i with the rotating shaft C1 fixed between them, the other rotating shaft 0 rotates in the same direction with respect to one rotating shaft f that is rotationally driven, and the following occurs. cause problems. That is, the pair of propellers A and C have opposite pitches and fixed pitches, and are designed to generate thrust in the same direction by being driven to rotate in opposite directions.

Therefore, even if power transmission could be ensured, there was a problem in that if these propellers b9C rotated in the same direction, they would cancel each other out and no thrust could be generated. As a result, even though power transmission from engine Q could be secured, propulsion was not possible, and in the end it was not possible to escape from the critical situation.

In consideration of the above-mentioned problems, it is desired to devise a propulsion system that is highly reliable as a whole and that allows continuous navigation even in emergency situations.

The present invention has been devised to effectively solve the above-mentioned problems.

Means for Solving Problem F] The present invention provides a counter-rotating shaft in which an inner rotating shaft is inserted through a bearing into a hollow outer rotating shaft and transmits power coaxially while being reversed to each other; an auxiliary distribution means whose distribution output end is connected to the outer rotation shaft and the inner rotation shaft of the reversing shaft, and an engine is connected to the input end, and which distributes and transmits the engine power to these rotation shafts; and a power distribution f-stage. A power cutting means installed between the input end and the distribution output end for cutting off the power transmission to either one of these rotating shafts, and a coaxial and a pair of propulsors which are arranged one on top of the other along the axial direction and have opposite pitches to each other, and at least one of which has a variable pitch mechanism.

[Function] To describe the function of the present invention, between the input end and the distribution output end of the power distribution means that distributes and transmits the input power to the outer rotation shaft and the inner rotation shaft of the counter-rotating shaft. By cutting off the power transmission to one of the rotating shafts using the power cutting means, even if the bearings become stuck and the rotating shafts cannot be reversed, the power transmission can be continued by driving the other rotating shaft to rotate. Among a pair of propulsors, which are constructed with opposite pitches and are reversed to generate thrust in the same direction when the counter-rotating shaft is normal,
By making at least one of the propellers variable pitch, when the outer rotation axis and the inner rotation axis of the emergency special contra-rotating shaft are rotated in the same direction, the pitch is changed and the pair of propellers are moved together. As the pitches are in the same direction, thrust can be generated in the same direction by rotating in the same direction.

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

As shown in FIG. 1, a pair of screw propulsors 1.2 configured with opposite pitches are installed coaxially and in series in series along the axial direction, and these propellers 1.2 are connected to each other. By reversing the direction, it is possible to propel with high propulsion efficiency. A counter-rotating shaft 3 is connected to these propulsors 1 and 2 in order to coaxially drive them to rotate in opposite directions. The counter-rotating shaft 3 is constructed by inserting an inner rotating shaft 6 through a bearing 5 into a hollow outer rotating shaft 4, and drives these propellers 1.2 by coaxially transmitting power while being reversed with respect to each other. It is supposed to be done. Here, the outer rotating shaft 4 is rotatably supported by a housing 7 fixed to the hull via a thrust bearing 8 and a radial bearing 9. Further, the inner rotating shaft 6 is connected to the stern propeller 1, and the outer rotating shaft 4 is coupled to the bow propeller 2.

Between the counter-rotating unit @3 that transmits power in this way and the power generating machine 11Q (not shown), there is an external rotating unit
4 and the inner rotating shaft 6 respectively, the distribution output ends 10a, 10
b are connected, and a power distribution means 1o is installed for distributing and transmitting the power input from the input end 10c to these rotating shafts 4 and 6 in reverse rotation. Specifically, as shown in FIG. 2, this power distribution means 10 includes a flange coupling 12 connected to an intermediate shaft 11 for transmitting engine power from the engine, and an M star supported within the housing 7. It is composed of a gear device 13 and a gear coupling 14 that connects these planetary gears W113 and the flange coupling 12. The flange coupling 12 is detachably fitted into and attached to the inner rotating ring 6 of the counter-rotating shaft 3. On the other hand, the planetary gear device 13 has a general configuration, and includes an annular sun gear 16 that is fitted and attached to a sleeve body 15 surrounding the inner rotating shaft 6, and a housing 7 that supports it so that it can rotate freely on its axis while its revolution is restricted. The M star gear 17 is meshed with the sun gear 16, and the annular internal gear 18 is meshed with the planetary gear 17.

A gear portion 4a formed on the outer rotating shaft 4 is meshed with this internal gear 18. Further, the gear coupling 14 is formed in an annular shape and meshes with gear portions 12a and 15a formed on the seven-lunge coupling 12 and the sleeve body 15, respectively, to connect them. 11 [11 Power is input to the 7-lunge coupling 12 via the intermediate shaft 11, and part of the power is directly transmitted from the 7-lunge coupling 12 to the inner rotating shaft 6, and the rest is transmitted to the gear coupling 14. is transmitted to the i-star gear unit 13 via
The rotation direction is reversed by the TI star gear system ra13 and the internal gear 1
8 to the outer rotating shaft 4, and 7
The lunge coupling 12 is the input end 1 of the power distribution means 1o.
In addition to forming 0c, this 7 lunge coupling 12
and an internal gear 18 constitute distribution output ends 10b, 10a to the inner rotating shaft 6 and outer rotating shaft 4, respectively.

A power disconnection mechanism is provided between the internal gear 18, which is one of the distribution output ends 10a, and the flange coupling 12, which is the input end 10c, of the power distribution means 10 configured in this way to cut off the power transmission to the outer rotating shaft 4. Means 19 are provided. In this embodiment, the power cutting means 19 is attached to the housing 7.
The li! extends from the inside to the outside and is supported so as to be swingable, and one end is engaged with the four engaging portions 14a formed on the gear coupling 14! It is composed of a moving lever 20. By swinging this swing lever 20,
The gear coupling 14 is moved to detachably fit between the flange coupling 12 and the sleeve body 15, and the flange coupling 12 and the sleeve body 15 are separated to cut off power transmission to the outer rotating shaft 4. It looks like this.

With this configuration, the bearing 5 is fixed and the rotating shaft 4.6
Even in the case where the mutual rotation becomes impossible and power transmission cannot be performed, the power cutting means 19 cuts off the power transmission to the outer rotating shaft 4, so that the outer rotating shaft 4 is free to rotate, and the engine power can be maintained. Transmission can be continued from the flange coupling 12 to the inner rotating shaft 6. Therefore, the propulsion device 1 can be driven with N M .

Note that the swing lever 20 is operated with the engine stopped.

Incidentally, the pair of propellers 1.2 are configured as reverse bidges, and these propellers 1.2 are configured to generate thrust in the same direction by being reversed with respect to each other. On the other hand, in the above-mentioned power transmission mechanism, when the power cutting means 19 is activated to cut off the power transmission to the outer rotating shaft 4 and transmitting power only to the inner rotating shaft 6, the bearing 5 is fixed to the outer rotating shaft 4. The thrusters 1.2 rotate in the same direction as the inner rotating shaft 6, and the propellers 1.2 cannot generate thrust by interacting with each other due to the rotation in the same direction.

Therefore, in order to generate thrust even when the thrusters 1 and 2 are rotationally driven in the same direction, at least one of the pair of thrusters 1 and 2 is equipped with a variable pitch mechanism, and the aJ force cutting means is equipped with a variable pitch mechanism. When the power is cut off at step 19, the variable pitch mechanism is activated so that the pitch can be changed so that forward thrust can be generated even if the propeller 1.2 is rotated in the same direction.

In this embodiment, as shown in FIG. 1, since the variable pitch mechanism 23 has a simple structure, the inner rotation @
The stern side propulsion i81 is connected to the stern side propulsion i81. If necessary, it may be installed in the bow propeller 2 or both propellers 1.2.

As shown in the figure, the variable pitch mechanism 23 has a general configuration, and mainly consists of a cross latch attached to the male end of the blade 25.
A ped 40, a yoke 26 provided in the thruster boss 24 and reciprocating while engaging with the crosshead 40 to rotate the first crosshead 40, and a yoke formed through the inner rotating shaft 6 along its axial direction. An oil passage 27 for supplying and discharging hydraulic oil for reciprocating VJ 26, and a V supply/discharge port 28 formed in the flange coupling 12 and communicating the oil passage 27 to the outside of the shaft.
It consists of

When the engine is stopped, hydraulic oil is supplied and discharged from the supply/discharge port 28 of the flange coupling 12 to the yoke 26 via the oil passage 27, thereby causing the yoke 26 to reciprocate and rotate the crosshead 40 to rotate the blade. 25 pitches can be changed.

With this configuration, even if the outer rotating shaft 4 rotates in the same direction with respect to the inner rotating shaft 6 due to the fixation of the bearing 5,
By changing the pitch, the pair of thrusters 1 and 2 can be rotated in the same direction to generate thrust in the same direction, with pitches in the same direction.

Furthermore, installing the variable bidge mechanism 23 in at least one of the pair of propulsors '1.2 in this manner has the following advantages. In other words, when designing blades, it is preferable to consider the water flow component that is dragged by the hull and flows forward l\\ with respect to the water flow flowing from the rear of the ship to the propulsion unit, but this water flow is uneven, the distribution is not uniform, and unknown Because there are many factors involved, it is not always possible to optimally design a blade.

If at least one of the pair of propulsors 1 and 2 is provided with a variable pitch mechanism 23, the operating conditions can be made as good as possible by changing the bits of the blades, and as described above. This function can be used not only in an emergency due to a stuck bearing, but also during normal navigation, improving propulsion performance. This means that
This is effective in that it is possible to optimize the propulsion state by pitch: lIl, especially when the design of the blade is difficult.

In particular, in this embodiment, since the variable pitch mechanism 23 is configured to be operated by hydraulic pressure, there is no backlash compared to a gear configuration, and the pitch can be changed smoothly. .

Furthermore, since the hydraulic oil is directly supplied to and discharged from the propeller boss 24, the main components of the variable pitch mechanism 23 can be installed only within the boss 24, and the structure is simple and can be adopted at low cost.

3 and 4 show other configuration examples of the variable pitch mechanism 23.

In the one shown in FIG. 3, the yoke 26 is operated from the intermediate shaft 11 side via a rod 32.

The variable pitch mechanism 23 includes a cylinder chamber 30 formed by interposing two sleeves between the intermediate shaft 11 and the flange coupling 12, and a cylinder chamber 30 provided inside the cylinder v30 so as to be movable back and forth along the axial direction. The piston 31 is inserted into the inner rotating shaft 6 so as to be able to reciprocate along its axial direction, and one end is connected to the piston 31 and the other end is connected to the yoke 26, and the IC rod 32 and the sleeve 29 are connected to each other. It is comprised of a pair of supply and discharge ports 28 that are formed through the cylinder chamber 30 and supply and discharge hydraulic oil to and from the cylinder chamber 30. By supplying and discharging Ald+ into the cylinder chamber 30, the rod 32 can be moved forward and the pitch can be changed.

The one shown in FIG. 4 is composed of gears. This includes a first bevel gear 33 provided at the base end of the blade 25 and a second bevel gear 33 that is meshed with the first bevel gear 33.
a bevel gear 34, and a sleeve-shaped gear box 35 interposed between the intermediate shaft "11" and the flange coupling "12".
a gear 36 provided therein; and a rotating rod that is rotatably inserted into the inner rotating shaft 6 along its axial direction and has one end connected to the gear 36 and the other end connected to the second bevel gear 34. 37, and three binions which have an operation rotating shaft 38 extending outside the gear box 35 and are meshed with the gear 36. By rotating the three binions, the bevel gears 33 and 34 are connected via the rotating rod 37.
The pitch can be changed by rotating the V.

Even in these cases, the same effects as in the above embodiment can be obtained.

Further, FIG. 5 and FIG. 7 show other configuration examples regarding the power transmission mechanism.

The one shown in FIG. 5 has the gear coupling 14 abolished. A sleeve body 15 is slidably spline-fitted and provided between the sun gear 16 and the flange coupling 12, and the sleeve body 15 is slidably moved by a swing lever 20 to be separated from the sun gear 16. The structure is such that power transmission is cut off.

What is not shown in FIG.
Internal gear 1
8 is separated from the gear portion 4a of the outer rotary shaft 4 to cut off power transmission. In this embodiment, the flange coupling 12 and the sleeve body 15 are integrally joined.

The one shown in FIG. 7 eliminates the gear coupling 14 and has a structure between the flange coupling 12 and the sleeve body 15.
The ring body 22 which can be divided into two in the radial direction is cut by a power cutting means 19.
These are arranged so that they are collinear with each other with bolts or the like. When cutting off power transmission, remove the bolts etc. and remove the ring body 22 from between the flange coupling 12 and the sleeve body 15, creating a clearance between the flange coupling 12 and the sleeve body 15, and removing them. It is possible to disconnect the power transmission and cut off the power transmission.

Even in these cases, the same effects as in the above embodiment can be achieved.

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

Between the input end and the distribution output end of the power distribution means for distributing and transmitting power to the counter-rotating shaft, there is provided a power cutting means for cutting off power transmission to either the outer rotating shaft or the inner rotating shaft. Due to the installation number, even if the rotating shafts cannot be reversed due to stuck bearings, power can continue to be transmitted through one of the rotating shafts. Of a pair of thrusters that are configured with opposite pitches and generate thrust in the same direction by being reversed to each other when the counter-rotating shaft is normal, at least one of the thrusters has a variable pitch. When the outer rotation axis and the inner rotation axis of the are rotated in the same direction, it is possible to change the pitch so that the pair of thrusters are both rotated in the same direction and generate thrust in the same direction. This enables continuous navigation even in emergency situations and improves the reliability of the propulsion system.

[Brief explanation of drawings]

Fig. 1 is a side view showing a preferred embodiment of the present invention, Fig. 2 is an enlarged 1ull IIyi side view of the main part showing the power transmission mechanism, and Figs. 3 and 4 are other configurations of the variable pitch mechanism. FIGS. 5 to 7 are side sectional views showing other configuration examples of the power transmission mechanism, and FIG. 8 is a schematic side sectional view showing a conventional example. In the figure, 1.2 is a screw propulsion device illustrated as a propulsion device,
3 is a counter-rotating shaft, 4 is an outer rotating shaft, 5 is a bearing, 6 is an inner rotating shaft, 10 is a power distribution means, 10a and 10b are distribution output ends thereof, 10c is an input end thereof, 19 is a power cutting means,
23 is a variable pitch mechanism. Patent Applicant: Ishikawajima-Harima Heavy Industries Co., Ltd. Representative Patent Attorney: Nobuo Kinuya Figure 1: 19: to t) Nakomachi Morning Attack

Claims (1)

[Claims] An inner rotating shaft is inserted into the hollow outer rotating shaft via a bearing, and a counter-rotating shaft that transmits power coaxially while being reversed to each other, and a counter-rotating shaft that transmits power coaxially while being reversed to each other, and A power distribution means is provided between the input end and the distribution output end of the power distribution means, to which the distribution output end is connected and the engine is connected to the input end, and the power distribution means distributes and transmits the engine power to these rotating shafts. A power cutting means for cutting off power transmission to either one of the rotating shafts, and a power cutting means provided on each of the outer rotating shaft and the inner rotating shaft of the counter-rotating shaft, coaxially and overlapping each other along the axial direction; A propulsion device comprising a pair of propulsion devices configured with opposite pitches and at least one of which has a variable pitch mechanism.