JPH072395Y2 - Idling propeller device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a free-running propeller device, and more particularly, to a free-running propeller that generates auxiliary thrust by being rotationally driven by a wake of a screw propeller. Regarding the device.

[Prior Art] Generally, as a device that contributes to the improvement of propulsion efficiency of a ship,
An idle propeller device provided behind a propulsion device is known.

As shown in FIG. 8, a conventional idler propeller device 1 of this type is shown in FIG.
Is attached to the screw propulsion device 3 provided at the stern of the hull 2 coaxially behind it. The idler propeller device 1 has a blade 5 having a diameter slightly larger than that of the blade 4 of the screw propeller 3, the blade surface located in the wake F is formed in a turbine blade shape, and The tip blade surface radially outward of the blade surface is formed with a normal propeller pitch. That is, the entire turbine blade-shaped portion receives the wake F and is rotationally driven, and an auxiliary thrust force is generated at the tip portion thereof.

Further, a ladder 6 positioned so as to face the wake F is provided behind the idler propeller device 1 and is rotatably supported by a ladder horn 7 suspended from the hull 2. That is,
By changing the rotation angle, the traveling direction of the hull 2 is appropriately controlled.

As shown in FIG. 9, the stub shaft 8 forming the shaft portion of the idling propeller device 1 is fastened to the rear end 10 of the boss portion 9 of the propulsion device 3 by a mounting bolt 11 extending in the axial direction. At the same time, a boss portion 12 that integrally supports the blade 5 of the idler propeller device 1 is rotatably supported via a bearing member 13.

A lubricating space 14 is defined between the stub shaft 8 and the boss portion 12 for accommodating the bearing member 13 and allowing lubricating oil to flow therethrough. At the rear end 15 of the boss portion 12, the lubrication space 14
An end cover 16 for sealing the is attached by a bolt 17. A lubricating oil supply pipe 18 extended into the stub shaft 8 is communicated with the lubricating space 14 through the inside of a propeller shaft (not shown) and the propeller boss portion 9, and the lubricating oil supply pipe 18 Lubricating oil is supplied to the bearing member 13 via the.

[Problems to be Solved by the Invention] By the way, the conventional idler propeller device 1 is not provided with means for checking the rotational state of the blade 5. Therefore, there is a problem that it is not possible to accurately grasp whether or not the idling propeller device 1 is operating normally.

This is because the stub shaft 8 itself which supports the blade 5 is rotating together with the propulsion device 3, and there is no suitable non-rotating body in the vicinity of the blade 5 so that a rotation detector or the like can be provided. It was due to circumstances.

Even if some kind of non-rotating body is provided and the rotation detector is attached, the surroundings of the idler propeller device 1 is seawater, and since it is not easy to replace it once attached, sufficient durability is required. To be done. However, making the rotation detector and its wiring completely seawater resistant was expected to be very difficult.

On the other hand, the present applicant has previously proposed a structure in which the idling propeller device 1 is supported by the ladder horn 7. (Japanese Patent Application Sho 62-155
No. 414). This configuration eliminates the weight support of the idler propeller on the propeller shaft system, prevents entrainment between the idler propeller and the propeller shaft system, and prevents the idler propeller from having the same wake direction and mounting direction. Prevention of dropout,
The simplification of the structure by the equipment of the lubricating oil supply system to the rudder horn was achieved, and the installation structure of the idling propeller was improved as a whole.

However, in this proposal, the means for detecting the rotation of the blade is not referred to, and the above problem has not been solved.

Therefore, in view of the above circumstances, the present invention was devised to newly provide an idling propeller device capable of detecting rotation.

[Means for Solving the Problems] The present invention provides a free-running propeller device in which a ladder horn provided at the rear of a propulsion device is provided with a shaft projecting forward, and a free-moving propeller is rotatably supported by the shaft. , A lubricating space filled with lubricating oil that is forcibly circulated by an oil hole provided in the shaft is formed between the boss of the idler propeller and the shaft, and the boss or the boss rotates integrally. The object to be detected is attached to the inner wall of the member, and the shaft body is provided with a plurality of rotation detectors which expose only the sensing part in the lubricating space and are close to the object to be detected.

[Operation] With the above configuration, the idler propeller is located behind the propulsion device and rotates around the shaft body by the subsequent flow to generate an auxiliary propulsion force. Since the rotation detector is provided on the shaft body that is a fixed system, it detects a non-detecting body that rotates together with the idler propeller to detect whether the idler propeller is rotating or not. Detect whether is correct. The function of the sensing portion of the rotation detector is maintained by being exposed only to the circulating lubricating oil while appropriately performing quality control.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 and FIG. 2 show one embodiment of the idling propeller device according to the present invention. The same components as those of the conventional one are designated by the same reference numerals, and the description thereof will be omitted.

This idle propeller device 21 includes a lathe horn 7 and a rotation axis A
A stub shaft 22 that is a shaft body that projects forward along the blade 5 and a boss portion 12 that are idler propellers are rotatably supported. The stub shaft 22 is internally provided with a rotation detector 23 for detecting the rotation state of the blade 5. In addition, in this embodiment, the ladder horn 7 and the stub shaft 22 are connected by a flange structure, and are vertically held by the front end 24 of the ladder horn 7 and the rear end 25 of the stub shaft 22, respectively. Flange members 26, 27 are provided,
These are fastened by a through bolt 28 and a nut 29.

A front end portion 30 of the stub shaft 8 is provided with a detector storage chamber 31 formed by recessing the front end surface thereof, and is located so as to face the end cover 32 attached to the boss portion 12. The rotation detector 23 is accommodated in the detector accommodating chamber 31 and is held in close proximity to a metal plate (magnetic material) 33 which is an object to be detected attached to the inner wall of the end cover 32. The detector housing chamber 31 is connected to a cable guide hole 34 that axially penetrates the stub shaft 8 and a cable guide pipe 36 provided in a hollow chamber 35 formed at the front end 24 of the ladder horn 7. The cable 38 connected to the rotation indicator 37 provided on the hull 2 is conducted.

As shown in FIGS. 3 and 4, the rotation detector 23 is formed as a magnetic pickup that senses passage of the metal plate 33, and in the present embodiment, a circle centered on the rotation axis A. Three units are provided on the track B. A plurality (eight) of metal plates 33 facing them are also arranged along the track B. Then, the rotation detector 23 has a detector storage chamber 31.
Each of them is mounted by being screwed into a mounting seat 39 formed so as to cover the pickup seat 40, and a pickup portion 40 as a sensing portion thereof is projected to the outside of the mounting seat 39 and fixed by a nut 41. Therefore, the mounting seat 39 isolates the main body of the rotation detector 23 and the cable 38 from the lubricating oil filling the lubricating space 14.

Further, the screw portion 42 of the rotation detector 23 is provided with an oil resistant sealing material (not shown), and the mounting seat 39 and the stub shaft 8 are provided.
And are bolted to each other via a packing material 43 so as to maintain oil tightness.

In addition, as shown in FIG. 2, the hollow chamber 35 has a lubricating space.
An oil injection pipe 44 and an oil discharge pipe (not shown) communicating with 14 are provided, and like the cable guide pipe 36, are supported by a cover plate 45 provided on the rear side of the hollow chamber 35. Oil injection pipe 44
Is connected to an oil injection hole 46 formed in the stub shaft 8,
By forming an oil circulation path through the bearing member 13 provided in the lubrication space 14, the lubricating oil is supplied to the bearing member 13. Further, a magnet-equipped oil stiffness machine 48 is provided in the middle of an oil delivery path 47 connecting the oil injection pipe 44 and an oil delivery means (not shown), and the abrasion powder of the bearing member 13 is mixed into the lubricating oil to rotate. The detector 23 is prevented from adhering to it.

Further, in the hollow chamber 35, an oil supply pipe 49 is provided in parallel with the pipes 36, 44, and the lubricating oil is supplied to the sealing device 50 for sealing the rear end side of the boss portion 12. .

Next, the operation of this embodiment will be described.

The blade 5 and the boss portion 12 are rotationally driven by the wake F of the propulsion device 3 to generate auxiliary thrust. Also, by being supported by the ladder horn 7 via the stub shaft 22,
The weight support for the propeller shaft system that drives the propulsion device 3 is eliminated, and rotation with the propeller shaft system is prevented.

The metal plate 33 fixed to the end cover 32 rotates and moves in synchronization with the blade 5. The rotation detector 23 detects this movement as a passage at the mounting position and transmits the signal to the rotation indicator 37 via the cable 38 to detect the rotation speed (rotation speed). Further, since the plurality of rotation detectors 23 are provided, the rotation direction is confirmed from the order of detection of them.

As described above, since the rotation detector 23 is provided on the stub shaft 22 formed as a non-rotating body to detect the rotational movement of the metal plate 33 provided on the end cover 32 which is a rotating body, the blade 5 is normally operated. It can be detected whether or not it is rotationally driven.
That is, the idling propeller device 21 can accurately grasp the operating condition with a simple configuration.

Since the rotation detector 23 is provided so that only the pickup section 40 is exposed from the stub shaft 22, the detector main body and the cable 38 do not come into contact with seawater or lubricating oil, and there is no problem regarding durability. . Further, the stub shaft 22 need only be provided with the cable guide hole 34 and the detector storage chamber 31,
Due to its structure, the influence on the strength is minimized.

Although three rotation detectors 23 are provided, the number of rotations and the rotation direction can be detected with at least two rotation detectors, and the other one is used as a spare.

Further, in the present embodiment, since the ladder horn 7 and the stub shaft 22 are connected by the flange structure, the mounting can be made firmer than the conventional one.

That is, in the conventional mounting structure, as shown in FIG. 5, a female screw is bored in the rear end 10 of the boss portion 9 of the propulsion device 3, and the mounting bolt 11 is screwed into the female screw. Therefore, once the female screw is damaged, it cannot be repaired, and there is a problem that the entire propulsion device 3, which is a main component, must be replaced. Further, the effective length of the mounting bolt 11 can be set substantially only to the thickness of the flange portion of the stub shaft 8 joined to the surface of the rear end 10. Therefore, it was insufficient to function as a stretch bolt. In other words, the mounting bolt 11 has a problem that it cannot generate a predetermined axial force enough to support the idling propeller device that is subjected to a large external force in the axial direction.

In this embodiment, the effective shaft length as the extension bolt of the through bolt 28 can be set to a length corresponding to the member thickness of the flange members 26, 27, and the ratio of the shaft length and the shaft diameter can be increased. By doing so, it became possible to exert sufficient tightening force (axial force) as a stretch bolt. That is, since it is not necessary to form a female screw on the propulsion device 3 or the ladder horn 7, the shortage of tightening force is resolved, and replacement of the main member in the case of damage becomes unnecessary. Further, the through bolts 28 and the nuts 29 are made of a material having a large yield strength, so that the fastening force and the durability can be further improved.

In the above embodiment, the metal plate 33 provided on the end cover 32 is shown as the object to be detected, but any structure may be used as long as it rotates integrally with the blade 5 side.

For example, as shown in FIGS. 5 to 7, tooth portions 61 are recessed on the inner surface of the sealing device 50, and this is detected by a rotation detector 62 provided at the peripheral end portion of the stub shaft 22. Alternatively, a metal plate 64 may be provided on the inner wall 63 of the boss portion 12 and a rotation detector 65 adjacent thereto may be provided. Even in this case, the rotation detectors 62 and 65 are appropriately oil-tightly sealed so that the main body and the cord 38 do not come into contact with the lubricating oil.

In the above embodiments, the rotation of the idling propeller is detected magnetically, but the rotation may be detected by an optical sensor and a reflector.

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

A plurality of rotation detectors in which a lubricating space is formed between the shaft body that rotatably supports the idler propeller and the boss portion, and the detected object mounted on the boss side is exposed only in the sensing portion in the lubricating space. Since it can be detected with, the presence or absence of rotation of the idling propeller and the direction of rotation can be accurately grasped, and the sensing unit is not likely to be contaminated with adherents, etc., and can be a highly reliable and durable device. it can.

[Brief description of drawings]

FIG. 1 is a side view showing an idler propeller device according to the present invention, FIG. 2 is an enlarged sectional view of a II portion of FIG. 1, FIG. 3 is an enlarged view of a III portion of FIG. 2, and FIG. Front view, FIG. 5 is a side view showing another embodiment of the present invention, and FIG. 6 is VI-V in FIG.
Fig. 7 is a sectional view taken along the line I, Fig. 7 is a sectional view taken along the line VII-VII in Fig. 5, and Fig. 8 is a side view showing a conventional idler propeller device.
FIG. 9 is a partially cutaway side view showing the main part thereof. In the figure, 3 is a propeller, 5 is a blade of an idler propeller, 7 is a rudder horn, 12 is a boss of the idler propeller, 14 is a lubrication space, 22 is a stub shaft as a shaft, 23 is a rotation detector, and 32 is An end cover that is a member that rotates and moves integrally with the boss portion, 33 is a metal plate that is a detected object, 40 is a pickup portion that is a sensing portion, and 46 is a
Is an oil injection hole which is one of the oil holes.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 64-1690 (JP, A) Actually developed 62-96575 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A free-running propeller device comprising a rudder horn provided on the rear side of a propulsion device, provided with a shaft body projecting forward, and having the shaft body rotatably supporting the free-running propeller. Between the shaft portion and the shaft body, a lubricating space filled with lubricating oil that is forcedly circulated by an oil hole provided in the shaft body is formed, and the inner wall of the boss portion or a member that rotates integrally with the boss portion is formed. An object to be detected is attached to the shaft, and a plurality of rotation detectors are provided on the shaft body so as to expose only the sensing part in the lubrication space and are close to the object to be detected.