JP2968265B1 - Rotary vane steering gear - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To avoid troubles caused by hydraulic tightening, and to secure a minimum operation even if leakage occurs in some sealing materials. SOLUTION: A vane slit 23 having a width corresponding to a root portion 22a of a vane 22 is formed on an outer peripheral surface of a rotor 21 along an axial direction and at a predetermined depth in a radial direction,
The base 22 a is fitted into the slit 23 and the vane 22
Was attached to the rotor 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technology of a ship steering gear, and more particularly to a rotary vane steering gear.

[0002]

2. Description of the Related Art A conventional rotary vane type steering gear is, for example, as shown in FIGS.
And a rotor 2 housed in the interior of the housing 1. A bearing is formed by a boss 1a provided with shafts 2a and 2b of the rotor 2 at the bottom of the housing 1 and an annular cover 3 arranged at an upper opening of the housing 1. It is rotatably held via members 4a and 4b.

The rotor 2 has a tapered through hole 2c in the axial direction, and is fitted and fixed to a rudder shaft (not shown) by hydraulic pressure in the through hole 2c. The rotor 2 has a plurality of vanes 5 at equidistant positions along the circumferential direction of the outer peripheral surface.
Are integrally formed by cutting, and the vanes 5 hold sealing members 5c and 5d that are in sliding contact with the inner surfaces of the housing 1 and the cover 3 in slits 5a and 5b formed in the edges. In other rotary vane type steering machines,
Others form a vane separately from the rotor and fix the vane to the rotor with bolts.

The housing 1 is provided with a plurality of segments 6 fixed at equal intervals along the circumferential direction of the inner peripheral surface with bolts 7, and the vanes 5 of the rotor 2 are located between the segments 6. doing. The segment 6 holds a sealing material 6b that slides on the outer peripheral surface of the rotor 2 in a slit 6a formed in the edge.

[0005] The housing 1 and the cover 3 are each formed with an annular slit 1 formed at a portion facing the end face of the rotor 2.
b, 3a hold ring seal materials 8a, 8b,
The ring seal members 8 a and 8 b are arranged such that the edges thereof overlap the seal member 5 d of the vane 5 and the seal member 6 b of the fixed vane 6.

[0006] Between the housing 1 and the rotor 2, a plurality of oil chambers 9a defined by vanes 5 and segments 6,
9b, 9c, 9d are present, and the oil chamber 9a, the oil chamber 9c, and the oil chamber 9 are symmetrically positioned via the rotation axis of the rotor 2.
b and the oil chamber 9d are balanced holes 10a provided in the rotor 2,
10b, and the rotor 2 has a balance hole 11a communicating between upper and lower end faces.
A lubrication port 11b for filling the bearing member 4b with lubricating oil is provided at a position that can communicate with the balance hole 11a. The housing 1 includes oil chambers 9a, 9b, 9c, 9
Ports 12a, 12b, 12c, and 12d for connecting d to a hydraulic unit (not shown) are provided.

[0007]

When the vane 5 is formed separately and is fixed to the rotor 2 with bolts or the like instead of being integrally formed, the amount of displacement that occurs during hydraulic tightening is different from that of the vane 5. Unlike the rotor 2, the joint between the vane 5 and the rotor 2 and the ring seal materials 8a and 8b may be defective. When the vane 5 is fixed to the rotor 2 with bolts, the width of the vane 5 is reduced. Widened,
In the circumferential direction of the rotor 2, there is a problem that the effective distance in which the vanes 5 and the segments 6 do not interfere with each other becomes short, and the steering angle becomes small. Also, the balance holes 10a, 10
It was difficult to design and work the drilling of b.

To this end, as described above, the vane 5 is integrally formed on the outer peripheral surface of the rotor 2 by cutting, so that the rotor 2 is hydraulically fastened to the rudder shaft (not shown).
This avoids troubles that occur when fitting and fixing the steering wheel, and ensures a large steering angle.

However, when the vane 5 is integrally formed with the rotor 2, cutting the vane 5 is troublesome and time-consuming, resulting in a problem in cost. In addition, when a leak occurs in any of the sealing materials in the vane 5 and the segment 6, not only the oil chamber adjacent through the sealing material but also all the oil chambers 9 through the balance holes 10a and 10b.
a, 9b, 9c, and 9d have the same pressure, and there has been a problem that operation becomes impossible.

The present invention has been made to solve the above-mentioned problems, and can prevent troubles caused by hydraulic tightening while forming a vane separately from a rotor. It is an object of the present invention to provide a rotary vane type steering gear capable of securing a minimum operation even if a leak occurs.

[0011]

According to a first aspect of the present invention, there is provided a rotary vane type steering device which includes a rotor fitted to and mounted on a rudder shaft and a rotor housed therein.
To form a space for oil chamber around rotor
And an annular cover arranged in the upper opening of the housing.
Cover the shafts formed at the upper and lower ends of the rotor.
And the boss at the bottom of the housing
Freely held, equidistant along the circumferential direction of the outer peripheral surface of the rotor
Place a plurality of vanes at spaced positions, and
Multiple segments at equal intervals along the circumference of the
The oil chamber space with vanes and segments.
Rotary vane type steering machine divided into several oil chambers
A slit with a width corresponding to the base of the vane.
Prescribed along the axial direction and radially on the outer peripheral surface of
It is formed to the depth and the root
To the rotor and the slit facing the base of the vane.
Groove on the bottom of the rotor
Is provided.

According to the above-described structure, by fitting the root to the slit of the rotor and mounting the vane, a seal member that slides on the inner surface of the cover or the bottom surface of the housing is disposed at the upper end edge and the lower end edge of the vane. In doing so,
A groove and a sealing material for mounting the sealing material can be provided up to a position inside the outer peripheral edge of the rotor, and the edge is overlapped with the sealing material and formed on the inner surface of the cover and the bottom surface of the housing. The ring seal material disposed in the groove portion can be provided in sliding contact with an end face inside the outer peripheral edge of the rotor.

Therefore, even if the rotor is radially deformed when the rotor is hydraulically fastened to the rudder shaft, the ring seal and the overlapping portion of the ring seal and the seal material are not affected. Further, there is only a small gap between the root of the vane and the side surface of the slit due to the deformation of the rotor, and the leakage of oil at this location can be prevented by a cold-fitting technique or the use of an adhesive.

[0014] Further, a portion more redundant than the allowable thickness required for hydraulically tightening the rotor to the rudder shaft is provided on the outer periphery of the rotor, and a slit is provided in this redundant portion and a vane is attached, so that the rotor is mounted on the rotor. Sufficient strength against hydraulic tightening can be ensured.

In use, when hydraulic oil is supplied to one of the adjacent oil chambers via the vane, the vane receiving the hydraulic pressure moves to the other oil chamber, and the expansion of one oil chamber and the other oil chamber are performed. With the contraction of the oil chamber, the vane and the rotor rotate about the axis to apply torque to the rudder shaft.

At this time, the rotor receives the hydraulic pressure acting on the vane as a compressive force on the side surface of the slit facing the root of the vane. Therefore, it is not necessary to receive the hydraulic pressure acting on the vane by a fixing means such as a bolt that withstands a shearing force corresponding to the hydraulic pressure, and it is not necessary to set a mounting margin for arranging the fixing means such as the bolt on the vane. When using a small bolt, the diameter of the root of the vane can be set smaller than when fixing the bolt, and the vane and the segment interfere in the circumferential direction of the rotor. The effective distance at which they do not conflict with each other increases, and the steering angle increases.

[0017]

[0018] supplies in a state of mounting the vanes to the slit, the recess becomes hole communicating between the upper and lower end faces of the rotor, the lubricating oil in the upper and lower end surfaces of the balance hole and the rotor to equalize the pressure in the upper and lower end surfaces of the rotor Acts as a lubrication hole. Therefore, as before,
It is not necessary to provide the balance hole and the oil supply hole by the drilling operation, and the balance hole and the oil supply hole can be easily secured only by forming the groove-shaped concave portion by the cutting operation.

According to a second aspect of the present invention, there is provided a rotary vane-type steering machine comprising: a rotor fitted to and mounted on a rudder shaft;
To house the oil chamber around the rotor
Ring and an annular cover placed at the top opening of the housing
And a shaft formed at the upper and lower ends of the rotor
Boss on the bottom of the cover and housing.
To be rotatable and along the outer circumferential surface of the rotor in the circumferential direction.
Place multiple vanes at equal intervals
Multiple segments are placed at equal intervals along the circumferential direction of the inner peripheral surface.
And a vane and segment for the oil chamber
Rotary vane-type steering machine that partitions the space into multiple oil chambers
In order to connect each oil chamber to the oil pressure source in the housing
Ports are individually connected to each oil chamber and controlled to the same pressure
Pressure equalizing pipes are provided by communicating between the oil chambers
Provide a normal release valve that opens at normal time, and
A bypass pipe communicating between adjacent oil chambers via
Emergency opening to open in the middle of each bypass pipe in case of emergency
A valve is provided.

According to the above-described configuration, in use, hydraulic oil is supplied to each oil chamber from a hydraulic pressure source through a corresponding port, one of the adjacent oil chambers through the segment is set to a positive pressure, and the other oil chamber is set to a negative pressure. When the oil chamber around the rotor alternates between positive pressure and negative pressure, the vanes receiving the hydraulic pressure in each positive pressure oil chamber move to the adjacent negative pressure oil chamber side, The hydraulic oil in the oil chamber returns to the hydraulic circuit outside the housing through the port, and the vanes and the rotor rotate about the axis to apply torque to the rudder shaft. At this time, the pressure between the oil chambers located at symmetric positions via the rotation axis of the rotor is maintained at an equal pressure through the equalizing pipe.

[0021]

Further, when the leakage of the hydraulic oil occurs between the oil chamber adjacent via one of the segments, by closing the normally open valve of each pressure equalizing pipe communicating with both of the oil chamber, the oil The communication between the oil chamber and the oil chamber that communicates through the equalizing pipe is cut off, and the emergency release valve of the bypass pipe that connects between the leaking oil chambers is opened to communicate between the oil chambers. If hydraulic oil leaks between adjacent oil chambers via any of the vanes, close the normally open valve of each pressure equalizing pipe communicating with both oil chambers, and pass through the oil chamber and the pressure equalizing pipe. Cut off communication with the communicating oil chamber.

By this operation, it is possible to ensure the independence of the oil chambers without any leakage and to operate using these oil chambers.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment is basically the same as that described above with reference to FIGS. 4 and 5, and members performing the same operations are denoted by the same reference numerals and description thereof is omitted, and refer to FIGS. 4 and 5. I do.

1 to 3, the rotary vane type steering machine has a rotor 21 housed in a housing 1 and a boss 1a having shafts 21a and 21b of the rotor 21 provided on the bottom of the housing 1. And a ring-shaped cover 3 disposed at an upper opening of the housing 1, the bearing member 4 a,
It is rotatably held via 4b.

The rotor 21 has a tapered through hole 21c in the axial direction for fitting and fixing to a rudder shaft (not shown) by hydraulic tightening, and is provided at equally spaced positions along the circumferential direction. Are provided with a plurality of vanes 22. Rotor 21
Has a portion that is more redundant than the allowable thickness required for hydraulic tightening on the outer periphery, and a vane slit 23 having a width corresponding to the root portion 22a of the vane 22 is formed on the outer peripheral surface of the redundant portion. The vane 22 is formed in the vane slit 23 at a predetermined depth in the radial direction.
2a is fitted and mounted on the rotor 21.

The vane 22 presses the back surface of the root portion 22a against the bottom surface 23a of the opposing vane slit 23 by being tightened to the rotor 21 by the tightening bolt 24. 2
A groove-like concave portion 25 is provided between the upper and lower end surfaces of one. Since the concave portion 25 functions as a balance hole for balancing the pressure between the upper and lower end surfaces of the rotor 21 and an oil supply hole for supplying lubricating oil at the upper and lower end surfaces of the rotor 21, it is possible to perform easy cutting work without difficult drilling work. The balance hole and the oil supply hole can be secured.

The vanes 22 are provided with horizontal slits 22 at upper and lower edges facing the bottom surface of the housing 1 and the lower surface of the cover 3.
b, 22c. The horizontal slits 22b, 22c hold horizontal sealing members 26a, 26b which are in sliding contact with the bottom surface of the housing 1 and the lower surface of the cover 3, and are provided at the edges facing the inner peripheral surface of the housing 1. It has a vertical slit 22d, and holds a vertical seal member 26c that slides on the inner peripheral surface of the housing 1 in the vertical slit 22d. Ring seal members 8a and 8b arranged in the slits 1b and 3a of the housing 1 and the cover 3 face the upper and lower end surfaces of the rotor 21,
The edges are overlapped on the lateral sealing members 26a, 26b of the vane 22,
Further, the recess 25 is provided with an appropriate width so as not to close the recess 25.

Therefore, by fitting the vane 22 into the vane slit 23, the horizontal sealing members 26a and 26b disposed on the upper end edge and the lower end edge of the vane 22 are provided to a position inside the outer peripheral edge of the rotor 21. The ring seal members 8a and 8b, which are arranged with their edges superposed on the horizontal seal members 26a and 26b,
Slidably comes into contact with the inner end face of the outer peripheral edge of the ring seal member 8a, 8b and the ring seal members 8a, 8b even if the rotor 21 is deformed in the radial direction when the rotor 21 is hydraulically fastened to the rudder shaft. The overlapping portions of the horizontal sealing members 26a and 26b are not affected.

Each of the oil chambers 9a, 9b, 9c, 9d is provided with oil chambers 9a and 9 for controlling the positive pressure and the negative pressure to the same pressure during operation.
c and oil chambers 9b and 9d are equalizing pipes 27a and 27d, respectively.
b, and pressure equalizing pipes 27a and 27b are connected to a port 12a for connection to a hydraulic unit (not shown).
12b, 12c, and 12d, and each equalizing pipe 27a,
In the middle of 7b, there are provided normal opening valves 28a and 28b which are normally opened. Both equalizing tubes 27
a and 27b are communicated via bypass pipes 29a and 29b. Emergency release valves 30a and 30b for opening the plug in an emergency are provided in the middle of each of the bypass pipes 29a and 29b. The oil chambers 9a and 9d and the oil chambers 9b and 9c which are adjacent to each other through the
a, 30b in a state of opening the pressure equalizing pipes 27a, 27
b and the bypass pipes 29a and 29b.

In use, the rotor 21 is mounted on the vane 2
2 is received as a compressive force on the side surface of the vane slit 23 facing the root portion 22 a of the vane 22, so that the tightening bolt 24 is attached to the back surface of the root portion 22 a of the vane 22 and the bottom surface of the vane slit 23. A small-diameter bolt can be used, and the width of the root portion of the vane 22 can be set to be smaller than when the bolt is fixed. In the circumferential direction of 21, the effective distance at which the vanes 22 and the segments 6 do not interfere with each other increases, and the steering angle increases.

Further, between the oil chambers 9a and 9d and the oil chambers 9b and 9c adjacent to each other via any of the segments 6,
If hydraulic oil leaks due to a failure of the sealing member 6b, the normal opening valves 28a, 28 of the pressure equalizing pipes 27a, 27b are used.
b to close the oil chambers 9a and 9c and the oil chambers 9b and 9d communicating with each other through the pressure equalizing pipes 27a and 27b, and to connect the leaking oil chambers 9a and 9d and the oil chambers 9b and 9c. Emergency release valve 30 for pipes 29a, 29b
a, 30b to open the oil chambers 9a and 9d and the oil chamber 9
b and 9c are communicated.

When hydraulic oil leaks between the adjacent oil chambers 9a and 9b and between the oil chambers 9c and 9d via any one of the vanes 22, the normal opening valves 28a and 28b of the equalizing pipes 27a and 27b are opened. It closes and shuts off the communication between the oil chambers 9a and 9c and the oil chambers 9b and 9d that communicate with each other through the pressure equalizing pipes 27a and 27b.

By this operation, it is possible to ensure the independence of the oil chambers without any leakage and to operate using these oil chambers. Further, at the time of inspection, etc., the above-described operation is performed, and the operation thereof is confirmed.
The soundness of a, 9b, 9c, 9d can be confirmed from outside.

[0035]

As described above, according to the present invention, even if the rotor is deformed in the radial direction when the rotor is hydraulically fastened to the rudder shaft, the ring seal and the overlapping portion of the ring seal and the seal material are kept in contact with the rotor. Because it is located inside the outer peripheral edge of, it is not affected. Since the hydraulic pressure acting on the vane is received on the side of the slit facing the root of the vane, it is not necessary to fix the vane with fixing means such as bolts that withstand the shearing force corresponding to this hydraulic pressure, and the width of the root of the vane is eliminated. Can be set smaller than when bolts are fixed, the effective distance in which the vanes and the segments do not interfere with each other in the circumferential direction of the rotor becomes longer, and the steering angle becomes larger. Unlike the related art, it is not necessary to provide a balance hole and an oil supply hole by a drilling operation, and the balance hole and the oil supply hole can be easily secured only by forming a groove-shaped concave portion by a cutting operation.
By operating the valves of the equalizing pipe and the bypass pipe, the independence of the oil chambers is ensured, and each oil chamber can be operated independently, and even if leakage occurs in some sealing materials, minimal operation is possible. Can be secured.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a rotary vane type steering device according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of the rotary vane type steering device according to the embodiment.

FIG. 3 is a cross-sectional view showing a vane mounting structure according to the embodiment.

FIG. 4 is a longitudinal sectional view of a conventional rotary vane type steering machine, showing a cross section of a vane on the left side and a sectional view of a segment on the right side.

FIG. 5 is a plan sectional view of a conventional rotary vane type steering device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 3 Cover 6 Segment 8a, 8b Ring seal material 9a, 9b, 9c, 9d Oil chamber 12a, 12b, 12c, 12d Port 21 Rotor 21a, 21b Shaft 21c Through hole 22 Vane 22a Root 22b, 22c Side slit 22d Vertical slit 23a Bottom surface 23 Vane slit 24 Tightening bolt 25 Concave portion 26a, 26b Horizontal sealing material 26c Vertical sealing material 27a, 27b Equalizing tube 28a, 28b Normally open valve 29a, 29b Bypass tube 30a, 30b Emergency open valve

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-155799 (JP, A) JP-A-2-127801 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B63H 25/30 B63H 25/38

Claims (2)

(57) [Claims] 1. A rotor fitted and mounted on a rudder shaft, and a rotor
To form an oil chamber space around the rotor
Housing and an annular cover placed in the top opening of the housing.
A shaft having a bar and formed at the upper and lower ends of the rotor
To the boss provided at the bottom of the cover and housing.
And hold it rotatably, along the circumferential direction of the outer peripheral surface of the rotor.
Place multiple vanes at equally spaced positions
Multiple segments at equal intervals along the circumferential direction of the inner
For the oil chamber by vanes and segments
Rotary vane steering device that partitions the space into multiple oil chambers
A slit with a width corresponding to the base of the vane outside the rotor.
A predetermined depth along the axial direction on the peripheral surface and in the radial direction
And the base is fitted into this slit to lock the vane.
And the slit facing the base of the vane.
A groove-shaped recess is provided on the bottom surface between the upper and lower end surfaces of the rotor.
Rotary vane steering gear characterized in that digit. 2. A rotor fitted and mounted on a rudder shaft, and a rotor
To form an oil chamber space around the rotor
Housing and an annular cover placed in the top opening of the housing.
A shaft having a bar and formed at the upper and lower ends of the rotor
To the boss provided at the bottom of the cover and housing.
And hold it rotatably, along the circumferential direction of the outer peripheral surface of the rotor.
Place multiple vanes at equally spaced positions
Multiple segments at equal intervals along the circumferential direction of the inner
For the oil chamber by vanes and segments
Rotary vane steering device that partitions the space into multiple oil chambers
, A port in the housing to connect each oil chamber to a hydraulic source
Oil chambers that are individually connected to each oil chamber and controlled to the same pressure
A pressure equalizing pipe is provided by communicating between the pressure equalizing pipes.
A normal release valve to open the plug
Provide bypass pipes that communicate between adjacent oil chambers.
Emergency release valve installed in the middle of the pipe
A rotary vane type steering machine characterized by that.