JP5557693B2 - Rudder shaft fixing device of rotary vane type steering machine - Google Patents

Description

  The present invention relates to a rudder shaft fixing device of a rotary vane type steering machine.

  A conventional rotary vane type steering machine has a housing 1 and a rotor 2 housed therein, for example, as shown in FIGS. The rotor 2 is supported by a boss 1a provided at the bottom of the housing 1 at the lower shaft 2a, and the annular top cover 3 is mounted at the upper opening of the housing 1 by a top cover mounting bolt 3d. It is supported by.

  That is, the top cover 3 is formed with a plurality of mounting bolt holes 3 e penetrating in the vertical direction, and the top opening of the housing 1 is formed with a plurality of top cover mounting bolt screw holes 1 h. The top cover 3 is attached to the upper opening of the housing 1 by inserting a plurality of top cover attachment bolts 3d into the attachment bolt holes 3e and screwing into the top cover attachment bolt screw holes 1h.

  A radial bearing 4a and a thrust bearing 4b are inserted between the boss portion 1a and the lower shaft portion 2a, and a radial bearing 4c is inserted between the top cover 3 and the upper shaft portion 2b. The rotor 2 is rotatably held inside the housing 1 fixed to the hull with a load applied in the radial direction and the axial direction.

  The rotor 2 has an internal through-hole 2c into which the shaft head 5a of the rudder shaft 5 is inserted, and a plurality of vanes 2d are projected at equal intervals along the circumferential direction of the outer peripheral surface. The housing 1 is provided with the same number of segments 1b as the vanes 2d protruding at equal intervals along the circumferential direction of the inner peripheral surface.

  Each vane 2d of the rotor 2 holds an upper horizontal seal 2f in sliding contact with the back surface of the top cover 3 in an upper horizontal slit 2e formed in the upper end surface, and in a lower horizontal slit 2g formed in the lower end surface. A lower horizontal seal 2h that is in sliding contact with the inner bottom surface of the housing 1 is held, and a vertical seal 2j that is in sliding contact with the inner peripheral surface of the housing 1 is held in a vertical slit 2i formed on the distal end surface in the radial direction.

In addition, the segment 1b of the housing 1 holds a vertical seal 1d that is in sliding contact with the outer peripheral surface of the rotor 2 in a vertical slit 1c formed on the distal end surface in the radial direction.
The top cover 3 holds an annular upper ring seal 3b having an integral structure in an upper ring slit 3a formed at a portion facing the upper end surface 2k of the rotor 2. The housing 1 holds an integrally formed annular lower ring seal 1f in a lower ring slit 1e formed at a portion facing the lower end surface 21 of the rotor 2. The ring seal surface 3c of the upper ring seal 3b is in sliding contact with the upper end surface 2k of the rotor 2 in the circumferential direction, and the ring seal surface 1g of the lower ring seal 1f is in sliding contact with the lower end surface 2l of the rotor 2 in the circumferential direction. It is carried out.

Each of the seals 2f, 2h, 2j, 1d, 3b and 1f is made of an elastic material.
In the rotor 1, the upper and lower horizontal seals 2f and 2h are in sliding contact with the back surface of the top cover 3 and the inner bottom surface of the housing 1, respectively, and the vertical seal 2j is slidably in contact with the inner peripheral surface of the housing 1 in the housing 1. The vertical seal 1d of the segment 1b is in sliding contact with the outer peripheral surface of the rotor 2, and the upper end surface 2k of the rotor 2 is in sliding contact with the ring seal surface 3c of the upper ring seal 3b mounted on the top cover 3 in the circumferential direction. The lower end surface 2l of the rotor 2 rotates in a state of sliding contact with the ring seal surface 1g of the lower ring seal 1f mounted on the inner bottom surface of the housing 1 in the circumferential direction. Thereby, a plurality of hydraulic oil chambers 6a, 6b, 6c, 6d in which oil tightness is ensured are formed between the vane 2d and the segment 1b.

  These hydraulic oil chambers 6a to 6d are provided with hydraulic oil chambers 6a and 6c that form a counter electrode of the first group that rotates the rotor 2 in the left and right directions by the supplied pressure oil, and a second group of counter electrodes that rotate in the left and right directions. The hydraulic oil chambers 6b and 6d are formed into two groups.

  Each of the seals 2f, 2h, 2j, 1d, 3b, and 1f includes a seal from each of the hydraulic oil chambers (6a, 6c or 6b, 6d) having a higher pressure among the hydraulic oil chambers 6a to 6d. Necessary sealing surface pressure is given to each other surface by guiding hydraulic oil to the back surface.

  The rotor 2 is secured to the head 5a of the rudder shaft 5 by a known so-called hydraulic fitting. That is, as shown in FIG. 12, a plurality of annular oil grooves 5c communicating with each other are formed in the shaft head 5a of the rudder shaft 5, and the hydraulic nut 7 is screwed into the screw portion 5b on the upper portion of the shaft head 5a. Are combined. The hydraulic nut 7 incorporates a hydraulic piston (not shown) that pushes the top surface 2 m of the upper shaft portion 2 b of the rotor 2 through the seat surface 7 a of the hydraulic nut 7. High pressure oil is applied to the oil groove 5c from the hydraulic source for hydraulic fitting to increase the diameter of the internal through hole 2c of the rotor 2, and at the same time, the rudder shaft 5 is moved to the rotor 2 by the hydraulic piston of the hydraulic nut 7 by the increased diameter. Is pushed into the internal through hole 2c. When the predetermined amount of pushing is finished, the oil pressure in the oil groove 5c is released. As a result, a reduced diameter stress is generated in the internal through hole 2 c of the rotor 2, and the shaft head 5 a of the rudder shaft 5 is fitted.

The top surface 2m of the upper shaft portion 2b of the rotor 2 is provided with a lifting bolt screw hole 2n for lifting the rotor 2 in the assembly / opening operation of the steering gear.
The rotary vane type steering machine as described above is described in, for example, Patent Document 1 below.

  The conventional rotary vane type steering machine having the above-described configuration requires a very small installation area and a small weight as compared with other types of steering machines. (Refer to Patent Document 2 below).

  In that case, the port side rotary vane type steering machine and the starboard side rotary vane type steering machine are arranged symmetrically with respect to the longitudinal center line of the hull, including the internal components such as the rotor 2. Has been.

  One of the major features of a ship with two sets of rudder and steering gear is that even if one of the left and right rudders and steering gear becomes unusable, the ship continues to operate with only the other rudder and steering gear. It is possible to increase safety.

JP 2009-162290 A JP 2003-26096 A

  However, in the configuration in which the left and right sets of the rudder and the rotary vane type steering machine are provided as described above, for example, when any one of the left and right rotary vane type steering machines is broken, the hydraulic oil chamber 6a Since the oil tightness of ˜6d is lost, one rotary vane type steering machine not only becomes unusable but also cannot support an external force acting on one rudder. For this reason, one rudder is freely moved by external force, and there is a problem that it is difficult to continue the operation of the ship with only the other healthy (normal) rudder and the other rotary vane steering gear. It was.

  The present invention provides a rotary vane type steering machine capable of fixing the rudder shaft of the unusable rotary vane type steering machine at a neutral position of the rudder when the rotary vane type steering machine becomes unusable. An object is to provide a rudder shaft fixing device.

In order to achieve the above object, the first invention includes a rotor fitted and mounted on a rudder shaft, a housing that houses the rotor and forms a space for an oil chamber around the rotor, and an upper opening of the housing. An annular top cover,
The top cover is attached to the upper opening of the housing by inserting a plurality of top cover mounting bolts through the top cover and screwing into a plurality of screw holes for the top cover mounting bolts formed in the housing.
A hydraulic nut for fitting and mounting the rudder shaft to the rotor is screwed onto the head of the rudder shaft so that its seating surface faces the upper end surface of the rotor,
A plurality of vanes are arranged at equally spaced positions along the circumferential direction of the outer peripheral surface of the rotor,
Arrange the same number of segments as the vanes at equal intervals along the circumferential direction of the inner peripheral surface of the housing,
The oil chamber space is divided into a plurality of hydraulic oil chambers by vanes and segments,
The rotor has a lower shaft portion supported by a bottom portion of the housing via a bearing, and an upper shaft portion supported by the top cover via a bearing and is rotatable.
A rudder shaft fixing device for fixing a rudder shaft of a rotary vane type steering machine provided on a top surface of an upper shaft portion of a rotor with a screw hole for a lifting bolt for lifting a rotor during assembly and opening,
It consists of an annular plate that is detachable between the top surface of the upper shaft portion of the rotor and the seat surface of the hydraulic nut, and an eye plate that is provided on the outer peripheral side surface of the annular plate and protrudes radially outward.
By inserting the first fixing bolt through the annular plate and screwing it into the lifting bolt screw hole with the hydraulic nut threaded portion formed at the head of the rudder shaft passing through the annular plate, The ring plate can be fixed to the top surface of the upper shaft portion of the rotor,
The eye plate is provided with a rotation operation hole for rotating the rudder axle in a free state and a fixing hole for fixing the eye plate to the top cover,
The rudder axle can be fixed by inserting the second fixing bolt into the fixing hole of the eye plate and screwing it into the screw hole for the top cover mounting bolt.

  According to this, for example, when one of the seals provided in the rotary vane type steering machine breaks and the steering machine becomes unusable, and the rudder falls into a free state without being fixed against external force, Remove the hydraulic nut from the screw nut screw section at the head of the rudder shaft, and remove the top cover mounting bolt at a predetermined location from the top cover mounting bolt screw holes from the top cover mounting bolts that attach the top cover to the housing. Remove and fit the annular plate of the rudder shaft fixing device to the screw portion for the hydraulic nut. Then, the first fixing bolt is inserted into the annular plate and screwed into the lifting bolt screw hole, and the annular plate is fixed to the top surface of the upper shaft portion of the rotor. Thereby, the rudder shaft fixing device is attached to the rotor.

  Next, a wire or the like is hung on the eye plate rotation operation hole, the wire is pulled to rotate the rudder shaft fixing device together with the rotor, and the position of the eye plate fixing hole is set to the top cover at the above-mentioned removed position. Align with the position of the screw hole for the top cover mounting bolt at a predetermined location corresponding to the mounting bolt. Thereafter, the second fixing bolt is inserted into the fixing hole of the eye plate and screwed into the screw hole for the top cover mounting bolt at the predetermined position. Thereby, since an eye plate is fixed to a top cover and a rotor is fixed to a top cover by a rudder shaft fixing device, a rudder shaft (namely, rudder) can be fixed to a predetermined position.

In the rudder shaft fixing device according to the second aspect of the present invention, the plurality of hydraulic oil chambers are rotated in the left and right other directions with respect to the hydraulic oil chamber forming the counter electrode of the first group that rotates the rotor in the left and right directions by the supplied pressure oil. It consists of two groups with hydraulic oil chambers that make up two groups of opposite electrodes,
In order to form an oil tightness in each hydraulic oil chamber, each vane of the rotor has upper and lower surfaces on the top end in the radial direction so as to be in sliding contact with the back surface of the top cover and the inner peripheral surface and inner bottom surface of the housing. Vertical seals and upper and lower horizontal seals are provided on both end faces,
A vertical seal is provided on the distal end surface in the radial direction so that the housing segment is in sliding contact with the outer peripheral surface of the rotor.
An annular upper ring seal is provided on the back surface of the top cover so as to be in sliding contact with the upper end surface of the rotor.
A rudder shaft of a rotary vane type steering machine provided with an annular lower ring seal is fixed to the inner bottom surface of the housing so as to be in sliding contact with the lower end surface of the rotor.

In the rudder shaft fixing device according to the third aspect of the invention, the rotary vane type steering machine and the rudder shaft are provided in two sets symmetrically on the left and right side of the hull having two rudder,
The rudder shaft is fixed so that the rudder in a free state is maintained at the neutral position of the rudder.

  According to this, for example, one seal of one rotary vane type steering machine is broken and one rotary vane type steering machine becomes unusable, and one side rudder is not fixed to external force. When the vehicle falls into a free state, the rudder shaft fixing device can be used to fix the rudder shaft of one rotary vane type steering machine (that is, one rudder) to the neutral position of the rudder. Therefore, even if one rotary vane type steering machine becomes unusable, by operating the other rudder using the other rotary vane type steering machine functioning normally (sound), Ship operation can be continued and safety is improved.

  Similarly, when the other rotary vane type steering machine becomes unusable, the steering axis of the other rotary vane type steering machine can be fixed to the neutral position of the rudder using the rudder axis fixing device. Therefore, even if the other rotary vane steerer becomes unusable, it is possible to operate a ship by operating one rudder using one functioning rotary vane steerer. Can continue.

The rudder shaft fixing device according to the fourth aspect of the present invention is used for the circular plate, the first mounting alignment mark when used for the port side rotary vane type steering machine, and the starboard side rotary vane type steering machine. A second mounting alignment mark is provided,
By positioning the first mounting alignment mark with the rudder direction display mark provided on the port side rudder shaft, it is positioned with respect to the port side rudder shaft,
The second mounting alignment mark is aligned with the rudder direction display mark provided on the starboard side rudder shaft, thereby positioning with respect to the starboard side rudder shaft.

  According to this, both the rotary vane type steering machine on the starboard side or the rotary vane type steering machine on the starboard side, using the same rudder shaft fixing device, each rotary vane type rudder The steering shaft of the taker can be fixed at the neutral position of the rudder.

  As described above, according to the first invention, when the rotary vane type steering machine becomes unusable and the rudder falls into a free state with respect to external force without being fixed, the rudder shaft fixing device is used to The rudder shaft (that is, rudder) of the unusable rotary vane type steering machine can be fixed at a predetermined position (for example, neutral position of the rudder).

  Further, according to the third invention, when one of the rotary vane type steering machines becomes unusable and one of the rudders falls into a free state with respect to an external force without being fixed, the rudder shaft fixing device is used. The rudder shaft (that is, one rudder) of the one rotary vane type steering machine can be fixed at the neutral position of the rudder. Therefore, even if one rotary vane steerer becomes unusable, it is possible to operate the ship by operating the other rudder using the other functioning rotary vane steerer. Can continue, and the safety will be higher.

It is a top view of the stern provided with the two rotary vane type steering machines in embodiment of this invention, Comprising: The state which mounted | wore the one rotary vane type steering machine with the rudder axis | shaft fixing device is shown. It is a top view when a rudder axis fixing device is attached to one (starboard side) rotary vane type steering machine. It is a perspective view which shows the assembly | attachment procedure of a rudder shaft fixing device equally. It is a perspective view which shows the assembly | attachment point of a rudder shaft fixing device. It is a perspective view which shows the positioning point of a rudder shaft fixing device. FIG. 3 is a perspective view when the rudder shaft fixing device is mounted on a rotary vane type steering machine. FIG. 3 is a longitudinal sectional view when the rudder shaft fixing device is mounted on a rotary vane type steering machine. FIG. 6 is a plan view when the rudder shaft fixing device is positioned on one (starboard side) rotary vane type steering machine. FIG. 6 is a plan view when the rudder shaft fixing device is positioned on the other (port side) rotary vane type steering machine. It is a top view of a rudder axis fixing device same as the above. It is the perspective view which displayed some cross sections of the conventional rotary vane type steering machine. It is a longitudinal cross-sectional view of a rotary vane type steering machine, and is a view along arrow aa in FIG. It is a horizontal sectional view of a rotary vane type steering machine.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
In addition, about the member which performs the basically same function as the conventional thing previously demonstrated in FIGS. 11-13, the same number is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 1, the hull 20 has two rudder shafts 5 on the left and right, two left rudder 21P and right rudder 21S provided on the rudder shaft 5, and the respective rudder shafts 5 rotated. Two port rotary vane type steering machines 22P and starboard rotary vane type steering machines 22S that perform steering are provided. Both rotary vane type steering machines 22P and 22S have basically the same configuration as the conventional one explained in FIGS.

  As shown in FIG. 2, two screw holes 2n for lifting bolts are provided on the center line in the radial direction of the vane 2d so as to lift the rotor 2 in a balanced manner. The two are provided in a symmetric manner on a straight line orthogonal to the two. As shown in FIGS. 3 and 5, the top cover 3 is provided with an air vent plug 30.

  As shown in FIGS. 2, 4, and 10, reference numeral 11 denotes a rudder shaft fixing device that can fix the rudder shaft 5 of each rotary vane type steering device 22P, 22S, and each rotary vane type steering device 22P. , 22S can be used in common. Hereinafter, the configuration of the rudder shaft fixing device 11 will be described.

  The rudder shaft fixing device 11 is a detachable annular plate between the top surface 2m of the upper shaft portion 2b of the rotor 2 of each rotary vane type steering machine 22P, 22S and the seat surface 7a (back surface) of the hydraulic nut 7. 11a and two (a plurality of) eye plates 11b provided on the outer peripheral side surface of the annular plate 11a and projecting radially outward.

  As shown in FIGS. 4 and 5, the annular plate 11 a is externally fitted to the screw portion 5 b for the hydraulic nut 7 of the shaft head 5 a of the rudder shaft 5 and is attached to the top surface 2 m of the upper shaft portion 2 b of the rotor 2. The plurality of rotor lifting bolt screw holes 2n can be used to fix the plurality of first fixing bolts 11d. For this reason, the annular plate 11a is provided with a plurality of first fixing holes 11c having the same pitch circle and pitch as the rotor lifting bolt screw holes 2n. The first fixing bolt 11d has the same screw size as the rotor lifting bolt screw hole 2n. As shown in FIG. 5, when the rudder shaft fixing device 11 is mounted on the rotor 2, the screw portion 5b of the shaft head 5a of the rudder shaft 5 penetrates the annular plate 11a from the bottom to the top.

  As shown in FIGS. 2 and 4 to 7, the back surface of the eye plate 11 b is from the top surface of the top cover mounting bolt 3 d in a state where the annular plate 11 a is disposed on the top surface 2 m of the upper shaft portion 2 b of the rotor 2. Is also at the top. Further, at the tip of each eye plate 11b, a rotation for rotating the rudder shaft 5 of the rudder 21P, 21S in the free state, that is, the rotor 2, to the neutral position (predetermined position) of the rudder 21P, 21S by the rudder shaft fixing device 11. An operation hole 11e is provided. Further, each eye plate 11b is provided with two second fixing holes 11f for fixing the eye plate 11b to the top cover 3. These second fixing holes 11f match the pitch circle and pitch of the top cover mounting bolt 3d for mounting the top cover 3 to the housing 1.

  As shown in FIGS. 4, 6, and 7, the second fixing bolt 11g having the same screw size as that of the top cover mounting bolt 3d is connected to the second fixing hole 11f of the eye plate 11b and the top cover. 3 through a plurality of mounting bolt holes 3e at a predetermined location, and a top cover mounting bolt screw hole 1h at a predetermined location among the plurality of top cover mounting bolt screw holes 1h of the housing 1. The eye plate 11b can be connected and fixed to the top cover 3 by screwing into the top cover 3. At this time, as shown in FIG. 4, a collar 11h is interposed between the second fixing hole 11f and the second fixing bolt 11g.

  As shown in FIGS. 2, 4, and 8, a rudder direction display mark F is displayed on the top surfaces of the rudder shafts 5, and a port side mounting alignment mark is displayed on the annular plate 11 a of the rudder shaft fixing device 11. P (an example of a first mounting alignment mark) and starboard side mounting alignment mark S (an example of a second mounting alignment mark) are displayed.

  As shown in FIGS. 8 and 9, the rudder direction display mark F is a mark indicating the bow direction at the neutral position of each of the rudder 21P and 21S, and the center lines 24P and 24S in the front-rear direction of the rudder 21P and 21S. It consists of a straight line parallel to. Both mounting alignment marks P, S are radial straight lines centered on the axis of the rudder shaft 5, and the port rotary vane type steering machine 22P and the starboard rotary vane type steering machine 22S are arranged in the longitudinal direction of the hull. In view of the fact that it is installed symmetrically with respect to the direction center line 23, as shown in FIG. 9, when the rudder shaft fixing device 11 is attached to the port rotary vane type steering gear 22P, the port side installation alignment The connection fixing position is determined by the mark P, and when the rudder shaft fixing device 11 is attached to the starboard rotary vane type steering machine 22S as shown in FIG. 8, the connection fixing position is set by the starboard side alignment mark S. It is determined.

  As shown in FIG. 10, the port-side mounting alignment mark P is on a straight line 26p passing through the axis of the rudder shaft 5 and the port-side second fixing hole 11f. Further, the starboard side alignment mark S is on a straight line 26s passing through the axis of the rudder shaft 5 and the starboard side second fixing hole 11f.

  As shown in FIG. 8, the rudder shaft fixing device 11 is positioned with respect to the starboard side rudder shaft 5 by aligning the staring side mounting alignment mark S with the rudder direction display mark F of the starboard side rudder shaft 5. The Further, as shown in FIG. 9, the rudder shaft fixing device 11 is set on the port side rudder shaft 5 by aligning the port side alignment mark P with the rudder direction display mark F of the port side rudder shaft 5. Positioned.

  Further, among the plurality of top cover mounting bolts 3d, the top cover mounting bolt 3d positioned on a straight line (straight lines 24P and 24S in FIG. 1) parallel to the longitudinal center line 23 of the hull is used as the top cover at the foremost end. The mounting bolt 3df and the top cover mounting bolt 3da at the end are described. Further, the top cover mounting bolt 3d located on the port side of the top cover mounting bolt 3df at the foremost end is referred to as a top cover mounting bolt 3dfp, and the top located on the starboard side of the top cover mounting bolt 3df at the foremost end. The cover mounting bolt 3d is referred to as a top cover mounting bolt 3dfs. Further, the top cover mounting bolt 3d located on the port side of the top cover mounting bolt 3da at the end is referred to as a top cover mounting bolt 3dap, and the top positioned on the starboard side of the top cover mounting bolt 3da at the end. The cover mounting bolt 3d is referred to as a top cover mounting bolt 3das.

Hereinafter, the operation of the above configuration will be described.
For example, one of the left and right rotary vane type steering machines, for example, the starboard side rotary vane type steering machine 22S, is broken and becomes unusable. In this case, as shown in FIG. 1, the starboard rudder 21S can be fixed by attaching the rudder shaft fixing device 11 to the starboard side rotary vane type steering machine 22S.

A method for fixing the rudder shaft 5 (for example, starboard rudder 21S) of the rotary vane type steering machine 22S on the starboard side using the rudder shaft fixing device 11 as described above will be described below.
As shown in FIG. 3, the hydraulic nut 7 of the starboard side rotary vane type steering machine 22 </ b> S that has become inoperable is removed from the screw portion 5 b of the shaft head 5 a of the rudder shaft 5. Next, among the top cover mounting bolts 3d, the top cover mounting bolt 3df at the foremost end (predetermined location), the top cover mounting bolt 3dfp located next to the port side (predetermined location), and the rearmost end (predetermined location) The four top cover mounting bolts 3da and the top cover mounting bolt 3das located next to the starboard side (predetermined location) are removed from the mounting bolt screw holes 1h.

  After that, as shown in FIG. 4, the annular plate 11a of the rudder shaft fixing device 11 is externally fitted to the screw portion 5b of the shaft head 5a, and as shown in FIG. The annular plate 11a is rotated so that the alignment mark S is on the same straight line. At this time, the first fixing hole 11 c of the annular plate 11 a coincides with the lifting bolt screw hole 2 n on the top surface 2 m of the upper shaft portion 2 b of the rotor 2. Then, as shown in FIGS. 4, 5, and 7, the first fixing bolt 11d is inserted into the first fixing hole 11c and screwed into the lifting bolt screw hole 2n, and the annular plate 11a is connected to the rotor. 2 is fixed to the top surface 2m of the upper shaft portion 2b. Accordingly, the rudder shaft fixing device 11 is attached to the rotor 2 in a state where the screw portion 5b for the hydraulic nut 7 penetrates the annular plate 11a.

As shown in FIG. 8, the rudder shaft fixing device 11 is positioned with respect to the starboard side rudder shaft 5 by aligning the starboard side alignment mark S with the rudder direction display mark F.
Next, as shown by the solid line in FIG. 5, the wire 25 is hung on the rotation operation hole 11e of both eye plates 11b, and the wire 25 is pulled using a chain block or the like to pull the rudder shaft fixing device 11 (that is, the rotor 2 and starboard). 5) and the position of each of the second fixing holes 11f of both eye plates 11b as shown in the phantom line of FIG. 5 and FIG. The positions (predetermined locations) corresponding to 3df, 3dfp, 3da, and 3das are matched with the upper positions of the top cover mounting bolt screw holes 1h.

  Thereafter, as shown in FIGS. 4, 6, and 7, the second fixing bolt 11g is connected to the second fixing hole 11f of the eye plate 11b and the four top cover mounting bolts 3df, The top cover mounting bolt screw holes 1h are screwed into portions (predetermined portions) corresponding to 3dfp, 3da, 3das. Thereafter, the hydraulic nut 7 is tightened into the screw portion 5 b of the shaft head 5 a of the rudder shaft 5. As a result, both eye plates 11b are fixed to the top cover 3, and the rotor 2 of the starboard side rotary vane steering device 22S is fixed to the top cover 3 by the rudder shaft fixing device 11, and as shown in FIG. The rudder shaft 5 is fixed, and the starboard rudder 21S is fixed at the neutral position.

  When the second fixing bolt 11g is inserted into the second fixing hole 11f of the eye plate 11b, as shown in FIGS. 4 and 7, the second fixing bolt 11g and the second fixing hole 11f A collar 11h is interposed between the two.

  Therefore, even if, for example, the starboard side rotary vane steering 22S becomes unusable, the starboard rudder 21S is fixed at the neutral position by using the rudder shaft fixing device 11 as described above. By operating the port rudder 21P using the port side rotary vane type steering device 22P functioning in a healthy state, the operation of the ship can be continued and the safety is improved.

  Also, when the port side rotary vane steering 22P becomes unusable and the port rudder 21P is not fixed and falls into a free state with respect to external force, the same rudder shaft fixing device 11 as described above is used. The port rudder 21P can be fixed at the neutral position.

  In this case, the port side rotary vane type steering machine 22P and the starboard side rotary vane type steering machine 22S share the same rudder shaft fixing device 11, but the port side rotary vane type steering machine 22P and starboard side In view of the fact that the rotary vane type steering machine 22S is disposed symmetrically with respect to the longitudinal center line 23 of the hull, including its internal structure, the rudder shaft fixing device 11 is as follows. Apply.

  That is, after removing the hydraulic nut 7 of the port side rotary vane type steering machine 22P, which has become inoperable, from the screw portion 5b of the head 5a of the rudder shaft 5, the top end (predetermined) of the top cover mounting bolt 3d 3) top cover mounting bolt 3df and the top cover mounting bolt 3dfs located next to the starboard side (predetermined location), and the top cover mounting bolt 3da at the rear end (predetermined location) and the port side thereof (predetermined location). Four top cover mounting bolts 3dap are removed from the mounting bolt screw holes 1h.

  Thereafter, as shown in FIG. 9, the annular plate 11a of the rudder shaft fixing device 11 is externally fitted to the screw portion 5b of the shaft head 5a, and the rudder direction display mark F and the port side mounting alignment mark P are identical. The annular plate 11a is turned so that it is on the line. At this time, the first fixing hole 11c of the annular plate 11a coincides with the lifting bolt screw hole 2n on the top surface 2m of the upper shaft portion 2b of the rotor 2, and the first fixing bolt 11d is fixed to the first fixing bolt 11d. The rudder shaft fixing device 11 is attached to the rotor 2 by being inserted into the hole 11c, screwed into the lifting bolt screw hole 2n, and fixing the annular plate 11a to the top surface 2m of the upper shaft portion 2b of the rotor 2. It is done.

The rudder shaft fixing device 11 is positioned with respect to the port side rudder shaft 5 by aligning the port side mounting alignment mark P with the rudder direction display mark F.
Next, the wire 25 is hung on the rotation operation hole 11e of both eye plates 11b, and the rudder shaft fixing device 11 (that is, the rotor 2 and the port rudder 21P) is rotated by pulling the wire 25 using a chain block or the like. The position of each second fixing hole 11f of the eye plate 11b is set for each top cover mounting bolt at a location (predetermined location) corresponding to the four removed top cover mounting bolts 3df, 3dfs, 3da, 3dap. Align with the upper position of the screw hole 1h.

  Thereafter, the second fixing bolt 11g is inserted into the second fixing hole 11f of the eye plate 11b, and the removed four top cover mounting bolts 3df, 3dfs, 3da, 3dap through the collar 11h. Are screwed into the screw holes 1h for the top cover mounting bolts at locations corresponding to (predetermined locations). Thereafter, the hydraulic nut 7 is tightened into the screw portion 5 b of the shaft head 5 a of the rudder shaft 5. Thereby, both eye plates 11b are fixed to the top cover 3, and the rotor 2 of the rotary vane type steering machine 22P on the port side is fixed to the top cover 3 by the rudder shaft fixing device 11, and as shown in FIG. The rudder shaft 5 is fixed, and the port rudder 21P is fixed at the neutral position.

  Therefore, by operating the starboard rudder 21S using the starboard side rotary vane type steering device 22S that is functioning normally, the operation of the ship can be continued, and the safety is improved.

  In the above embodiment, the hull 20 is provided with two rotary vane type steering machines 22P and 22S, and the steering axis 5 of one rotary vane type steering machine that has become unusable is used as the steering axis fixing device 11. Although an example of fixing is shown, when one rotary vane type steering machine is provided in the hull 20 and this rotary vane type steering machine becomes unusable, the rudder may be in a free state with respect to external force. In order to avoid danger, the rudder shaft 5 (that is, the rudder) of this rotary vane type steering machine can be used for fixing with the rudder shaft fixing device 11.

1 Housing 1b Segment 1d Vertical seal 1f Lower ring seal 1h Top cover mounting bolt screw hole 2 Rotor 2a Lower shaft 2b Upper shaft 2d Vane 2f Upper horizontal seal 2h Lower horizontal seal 2j Vertical seal 2m Upper shaft top surface 2n Lifting Bolt screw hole 3 Top cover 3b Top ring seal 3d, 3df, 3dfp, 3dfs, 3da, 3dap, 3das Top cover mounting bolt 4a Radial bearing 4b Thrust bearing 4c Radial bearing 5 Rudder shaft 5a Shaft head 5b Threaded portions 6a, 6b 6c, 6d Hydraulic oil chamber 7 Hydraulic nut 7a Seat surface 11 Rudder shaft fixing device 11a Ring plate 11b Eye plate 11d First fixing bolt 11e Rotation hole 11f Second fixing hole 11g Second fixing bolt 20 Hull 21P, 21S Rudder 22P, 22S Rotary bay Shikikajito machine F steering direction display mark P port side of the mounting alignment mark (first mounting alignment mark)
S Starboard side alignment mark (second alignment mark)

Claims (4)

A rotor fitted and mounted on the rudder shaft, a housing that houses the rotor and forms a space for the oil chamber around the rotor, and an annular top cover that is disposed in the upper opening of the housing;
The top cover is attached to the upper opening of the housing by inserting a plurality of top cover mounting bolts through the top cover and screwing into a plurality of screw holes for the top cover mounting bolts formed in the housing.
A hydraulic nut for fitting and mounting the rudder shaft to the rotor is screwed onto the head of the rudder shaft so that its seating surface faces the upper end surface of the rotor,
A plurality of vanes are arranged at equally spaced positions along the circumferential direction of the outer peripheral surface of the rotor,
Arrange the same number of segments as the vanes at equal intervals along the circumferential direction of the inner peripheral surface of the housing,
The oil chamber space is divided into a plurality of hydraulic oil chambers by vanes and segments,
The rotor has a lower shaft portion supported by a bottom portion of the housing via a bearing, and an upper shaft portion supported by the top cover via a bearing and is rotatable.
A rudder shaft fixing device for fixing a rudder shaft of a rotary vane type steering machine provided on a top surface of an upper shaft portion of a rotor with a screw hole for a lifting bolt for lifting a rotor during assembly and opening,
It consists of an annular plate that is detachable between the top surface of the upper shaft portion of the rotor and the seat surface of the hydraulic nut, and an eye plate that is provided on the outer peripheral side surface of the annular plate and protrudes radially outward.
By inserting the first fixing bolt through the annular plate and screwing it into the lifting bolt screw hole with the hydraulic nut threaded portion formed at the head of the rudder shaft passing through the annular plate, The ring plate can be fixed to the top surface of the upper shaft portion of the rotor,
The eye plate is provided with a rotation operation hole for rotating the rudder shaft in a free state and a fixing hole for fixing the eye plate to the top cover.
A rotary vane type steering system characterized in that a rudder shaft can be fixed by inserting a second fixing bolt into a fixing hole of an eye plate and screwing it into a screw hole for a top cover mounting bolt. Rudder shaft fixing device. The plurality of hydraulic oil chambers include a hydraulic oil chamber that forms a counter electrode of a first group that rotates the rotor in one left and right direction by the supplied pressure oil, and a hydraulic oil chamber that forms a counter electrode of a second group that rotates the other left and right direction. It consists of two groups
In order to form an oil tightness in each hydraulic oil chamber, each vane of the rotor has upper and lower surfaces on the top end in the radial direction so as to be in sliding contact with the back surface of the top cover and the inner peripheral surface and inner bottom surface of the housing. Vertical seals and upper and lower horizontal seals are provided on both end faces,
A vertical seal is provided on the distal end surface in the radial direction so that the housing segment is in sliding contact with the outer peripheral surface of the rotor.
An annular upper ring seal is provided on the back surface of the top cover so as to be in sliding contact with the upper end surface of the rotor.
The rudder shaft of a rotary vane type steering machine provided with an annular lower ring seal is fixed to the inner bottom surface of the housing so as to be in sliding contact with the lower end surface of the rotor. The rudder shaft fixing device of the described rotary vane type steering machine. The rotary vane type steering and the rudder shaft are provided in two pairs symmetrically on the left and right side of the hull with two rudder.
The rudder shaft fixing device for a rotary vane type steering machine according to claim 1 or 2, wherein the rudder shaft is fixed so that the rudder in a free state is maintained at a neutral position of the rudder. A first mounting alignment mark for use on a port side rotary vane steering gear and a second mounting alignment mark for use on a starboard side rotary vane steering gear Is provided,
By positioning the first mounting alignment mark with the rudder direction display mark provided on the port side rudder shaft, it is positioned with respect to the port side rudder shaft,
4. The positioning according to claim 1, wherein the second mounting alignment mark is positioned with respect to the starboard side rudder shaft by matching the rudder direction display mark provided on the starboard side rudder shaft. The rudder axis | shaft fixing device of the rotary vane type steering machine of any one of Claims.

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