JP2001039382A - Intermediate shaft centering device for marine engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the lifetime of a bearing by preventing ueven working of an intermediate shaft on a bearing. SOLUTION: In order to adjust the inclination of an intermediate shaft between a diesel engine and a propeller driving shaft, a bearing elevation driving device 21 for supporting an engine-outside bearing for the intermediate shaft freely to be elevated and an intermediate shaft centering control device 41 for driving this bearing elevation driving device 21 are provided. This intermediate shaft centering control device 41 is provided with an engine temperature height computing unit 51 for computing quantity of a change of the relative height of an engine-inside bearing in relation to a stern tube bearing on the basis of the data of engine-inside temperature, engine-outside temperature, height of the intermediate shaft and thermal expansion and a load height computing unit 61 for computing quantity of a change of the relative height of the engine side bearing in relation to the stern tube bearing on the basis of the data of bow side draft depth, stern side draft depth, distance of the intermediate shaft, and the rigidity in the bow and stern direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate shaft aligning device for adjusting an intermediate shaft connecting a propulsion engine and a propulsion propeller of a ship.

[0002]

2. Description of the Related Art In a diesel engine of a ship, an intermediate shaft connecting a diesel engine and a propelling propeller sometimes causes trouble in a bearing of the intermediate shaft due to a change in various conditions. For this reason, at the time of installation, a bearing having a metal thickness different from the standard thickness was previously mounted based on empirical values.

[0003]

However, the height of the bearing in the engine depends on conditions such as the cold state at the time of installation and the hot state at the time of operation, load loading and changes in the waterline, and rigidity of the hull. The height of the bearing outside the engine changes, which causes the intermediate shaft to hit the bearing halfway, thus shortening the bearing life.Simply changing the metal thickness does not provide a fundamental improvement However, the bearing life could not be sufficiently extended.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an intermediate shaft aligning device for a marine engine which can solve the above-mentioned problems and can prevent one-side contact and extend the service life of the intermediate shaft.

[0005]

According to a first aspect of the present invention, there is provided a vehicle comprising: a propulsion drive shaft supported by a stern tube bearing and an output shaft of a propulsion engine mounted on a rear part of a hull. An intermediate shaft aligning device for a marine engine, which is connected to an internal bearing in the propulsion engine and supported by an external bearing outside the propulsion engine, for adjusting a tilt of the intermediate shaft, A bearing elevating drive device that supports the bearing so as to be able to move up and down, and an intermediate shaft alignment control device that drives the bearing elevating drive device are provided. An engine temperature state height calculation unit that calculates the amount of change in the relative height of the internal bearing with respect to the stern tube bearing from the external temperature, the intermediate shaft height data, and the thermal expansion data of the intermediate shaft. A height change that outputs the adjusted height of the external bearing based on the It is provided with a an amount command unit.

According to the above configuration, the height of the bearing in the engine is calculated by the engine temperature state height calculating section based on the temperature inside the propulsion engine, the temperature outside the engine, the height of the intermediate shaft, and the thermal expansion data. As a result, the vertical position of the external bearing of the intermediate shaft is accurately adjusted in response to the thermal deformation of the internal bearing of the engine due to the temperature rise of the engine, because the vertical drive of the external bearing is driven by driving the bearing lifting drive. Thus, the intermediate shaft can be prevented from hitting against the external bearing.

According to a second aspect of the present invention, there is provided an internal bearing of a propulsion engine which is connected between an output shaft of a propulsion engine mounted on a rear portion of a hull and a propeller drive shaft supported on a stern tube bearing. An intermediate shaft alignment device for a marine engine that adjusts the inclination of an intermediate shaft supported by an external engine bearing outside the propulsion engine, and a bearing lifting drive device that supports the external engine bearing of the intermediate shaft so as to be able to move up and down. An intermediate shaft centering control device that drives the bearing lifting drive device, the intermediate shaft centering control device includes a bow side draft depth measurement value, a stern side draft depth measurement value, intermediate shaft distance data, A load-load height calculating unit for calculating a change in relative height of the engine bearing with respect to the stern tube bearing from the stiffness data in the bow-stern direction of the hull; and an adjustment height of the external engine bearing based on the calculated value. Height change command section that outputs the height It is.

According to the above construction, the height of the internal bearing of the engine is calculated by the load height calculating section based on the draft depth on the bow side and the stern side, the intermediate shaft distance, and the rigidity of the hull. Drive to adjust the vertical position,
The vertical position of the external bearing of the intermediate shaft can be accurately controlled in response to the deformation of the hull due to the load of the load, and the intermediate shaft can be prevented from hitting against the external bearing.

Further, according to a third aspect of the present invention, there is provided an engine bearing connected between an output shaft of a propulsion engine mounted on a rear portion of a hull and a propeller drive shaft supported on a stern tube bearing. An intermediate shaft alignment device for a marine engine that adjusts the inclination of an intermediate shaft supported by an external engine bearing outside the propulsion engine, and a bearing lifting drive device that supports the external engine bearing of the intermediate shaft so as to be able to move up and down. An intermediate shaft centering control device that drives the bearing lifting drive device, the intermediate shaft centering control device includes a bow side draft depth measurement value, a stern side draft depth measurement value, intermediate shaft distance data, A load height calculator that calculates the change in the relative height of the engine bearing with respect to the stern tube bearing from the stiffness data in the bow-stern direction of the hull, a measured value of the draft depth on the bow side and a draft depth on the stern side. Measurements, intermediate axis distance data, and hull bow-stern A load-load height calculating unit for calculating the amount of change in the relative height of the engine-side bearing with respect to the stern tube bearing from the rigidity data of the stern tube bearing, and a height for outputting the adjusted height of the out-of-engine bearing based on these calculated values. And a change amount command unit.

According to the above configuration, the height of the internal bearing of the engine is calculated by the engine temperature state height calculating section based on the internal temperature of the propulsion engine, the external temperature, the height data of the intermediate shaft, and the thermal expansion data of the intermediate shaft. The load height calculation unit calculates the height of the internal bearings based on the draft depth on the bow and stern sides, the intermediate shaft distance, and the rigidity of the hull. Since the adjustment is made, it can respond to the thermal deformation of the internal bearing of the engine due to the temperature rise of the engine and the deformation of the hull due to the load of the load, and the position of the external bearing of the intermediate shaft can be controlled accurately. It is possible to prevent the outer bearing from hitting one side.

Further, the invention according to claim 4 is connected between the output shaft of the propulsion engine mounted on the rear part of the hull and the propeller drive shaft supported by the stern tube bearing, and is provided within the engine in the propulsion engine. An intermediate shaft aligning device for a marine engine for adjusting the inclination of an intermediate shaft supported by a bearing and an external engine bearing outside a propulsion engine, wherein the bearing elevating drive device movably supports the external engine bearing of the intermediate shaft. An engine-side shaft displacement sensor and an engine-outside shaft displacement sensor for measuring the height of the intermediate shaft between the engine-inside bearing and an engine-side intermediate shaft bearing; and the engine-side shaft displacement sensor and the engine-outside shaft displacement sensor And an intermediate shaft alignment control device that drives the bearing lifting / lowering drive device based on the output value.

According to the above construction, the vertical displacement of the intermediate shaft is measured directly between the engine side and the outside of the engine, and the bearing elevating drive unit is controlled by the intermediate shaft centering control device based on these measured values, and Since the vertical position of the outer bearing can be adjusted, the position of the outer bearing can be accurately adjusted according to the actual inclination of the intermediate shaft, and the intermediate shaft can be prevented from hitting against the outer bearing of the engine. .

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of an intermediate shaft aligning device for a marine engine according to the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, a diesel engine (propulsion engine) 2 is installed at a rear portion of the hull 1, and an internal flange (an engine) of a flywheel 4 provided at an end of a crank journal (output shaft) 3. The front end of the intermediate shaft 6 is connected to the output shaft 5. The intermediate shaft 6 is supported by an internal bearing 7 inside the engine 2 and supported by a plurality of external bearings 8A outside the engine 2. And the intermediate shaft 6
A propeller drive shaft 10 supported by the stern bearing 8B and the stern tube bearing 11 is connected via an engine outer flange 9 to the propeller drive shaft 10, and a propeller 12 for propulsion is attached to the rear end of the propeller drive shaft 10.

As shown in FIG. 3, this intermediate shaft centering device has a displacement δ ≒ 0 generated between the inner engine bearing 7 and the outer engine bearing 8A caused by a rise in temperature or deformation of the hull due to a load when the engine is driven. By eliminating .1-0.2 mm,
This is to prevent the intermediate shaft 6 from hitting and being damaged.
As shown in FIGS. 4 and 5, a bearing lifting drive device 2 that supports the external engine bearing 8A so as to be able to move up and down is provided on the external engine bearing 8A.
1 is provided. In this bearing lifting drive device 21, lifting rods 23 are erected on the mounting surfaces 20 on both sides of the intermediate shaft 6 via support blocks 22, respectively, and the linear motion guide member 33 provided on the bearing case 24 of the bearing 8 </ b> A is raised and lowered. Each is guided by a rod 23 so as to be able to move up and down. An elevating screw shaft 26 is rotatably erected on a lower mounting surface 20 of the bearing case 24 via a thrust bearing 25, and a female screw member 28 connected to a linear motion guide member 33 via a support member 27 is provided. It is fitted to the lifting screw shaft 26. A passive gear 29 is attached to a lower portion of the elevating screw shaft 26, and a pinion 31 that is rotationally driven by an elevating drive motor (bearing elevating drive device) 30 is provided in mesh with the passive gear 29. Reference numeral 32 denotes a bearing height detector for detecting the bearing height of the external bearing 8A.

Accordingly, the lifting screw shaft 2 is driven by the lifting drive motor 30 via the pinion 31 and the passive gear 29.
6 and the bearing case 24 via the female screw member 28.
Can be driven up and down to finely adjust the vertical position of the external bearing 8A. As shown in FIG. 6, the intermediate shaft alignment control device 41 that drives and controls the lifting drive motor 30 copes with deformation and displacement of the intermediate shaft 6 and the bearings 7, 8A due to heat when the diesel engine 2 is operated. In order to perform this operation, an engine temperature height calculating unit 51 is provided, and the deformation of the hull 1 due to the load loaded on the hull 1 and the bearings 7 and 8A are provided.
A load height calculating unit 61 is provided to deal with the displacement of.

That is, the engine temperature state height calculating section 51 measures the engine temperature Te by the engine thermometer 52 and is disposed outside the engine 2 in the vicinity of the intermediate shaft 6 or at a portion having a temperature equivalent thereto. The outside engine temperature To is measured by the outside engine temperature gauge 53, and a predetermined coefficient of thermal expansion c of the intermediate shaft 6 is set.
(/ ° C.) and the height H (mm) from the installation surface 20 of the engine 2 to the crank journal 3, a change in the relative height of the internal bearing 7 with respect to the stern tube bearing 11 when the engine 2 is in a warm state. The amount: Δh ₁ is calculated.

[0017]

(Equation 1) In addition, the load height calculating unit 61 calculates a measured value of the draft depth of the bow 1a measured by the bow-side draft depth detector 62:
Df, the measured value of the draft depth of the stern portion 1b measured by the stern side draft depth detector 63: Da, and the distance: L between the internal bearing 7 and the external bearing 8A of the intermediate shaft 6: L Variation in relative height of inner bearing 7 with respect to stern tube bearing 11: Δ
It is intended for calculating the h _2.

[0018]

(Equation 2) xi: distance from the stern of the intermediate bearing E: longitudinal sectional Factor I: geometrical moment of inertia G: cross section coefficient Aw: cross-sectional area of the hull M (x _i): bending moment _{M (x i) = M (} x i, Df , Da) in addition intermediate shaft alignment controller 41, the adder and the calculated value Δh1 institutional Yutakatai height calculation unit 51 by 42, calculated value Delta] h ₂ and the addition by the load load height calculation unit 61 (Δh ₃ =
Δh ₁ + Δh ₂ ). Further, the change amount is output from the height change amount command unit 43 to the drive unit output unit 44 based on the added value Δh ₃ , and a control signal is output from the drive unit output unit 44 to the lifting drive motor 30. Further, the elevation drive motor 30 is driven by this control signal, and the external bearing 8A
Is centered, the detection signal of the bearing height detector 32 is fed back to the subtractor 45, and is controlled so as to be an accurate control amount.

According to the first embodiment, the change amount Δh ₁ (in the stern tube bearing 1) of the in-engine bearing 7 when the diesel engine 2 is in a hot state during operation of the diesel engine 2 is controlled by the intermediate shaft alignment control device 41.
1) and the change amount Δh ₂ of the internal bearing 7 with respect to the load due to the load (the relative amount with respect to the stern tube bearing 11), and add them.
1 is driven and controlled, so that the outer engine bearing 8A corresponds to the displacement of the inner and outer engine bearings 7 and 8A due to the hull structural characteristics such as hull rigidity and thermal expansion by the hull design.
Of the intermediate shaft 6 against the external bearing 8A can be prevented, and damage can be prevented beforehand. Note that, instead of the screw shaft type bearing lifting / lowering drive device 21, a jack type bearing lifting / lowering drive device 64 may be used as shown in FIG.

FIG. 8 shows a second embodiment of the intermediate shaft centering device, and the same members as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted. In this embodiment, for example, the hull 1 is employed in the hull 1 which has extremely high rigidity due to its design structure and has very little deformation due to the load of the load. And its input system is deleted, and the engine temperature height calculation unit 51 and its input / output system are constituted.

According to the second embodiment, it is possible to prevent the external bearing 8A of the intermediate shaft 6 from hitting one side of the intermediate shaft 6 due to the displacement of the internal bearing 7 due to the heat of the diesel engine 2. The bearing 8A can be prevented from being damaged.

FIG. 9 shows a third embodiment of the intermediate shaft centering device, and the same members as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted. This embodiment is adopted for a hull in which the relative displacement between the internal bearing 7 and the external bearing 8A due to heat of the diesel engine 2 is extremely small due to the design of the hull and the like. Reference numeral 81 denotes a configuration in which the engine temperature state height calculation section 51 and its input system are deleted, and the load / load height calculation section 61 and its input / output system are included. According to the third embodiment, the hull 1 is deformed due to the load on the hull 1 and the load due to the draft position of the bow and stern, so that the engine bearing 7 of the intermediate shaft 6 becomes the stern tube bearing 11. The vertical position of the outer engine bearing 8A based on the relative change of the inner bearing 7 with respect to the stern tube bearing 11 calculated based on the hull stiffness and the draft depth of the bow and stern. Since the adjustment is performed by the bearing lifting / lowering drive device 21, it is possible to prevent the intermediate shaft 6 from hitting the external bearing 8A, and to prevent the external bearing 8A from being damaged.

FIG. 10 shows a fourth embodiment, in which the vertical change of the external bearing 8A is controlled by actually measuring the intermediate shaft 6. As shown in FIG. That is, the intermediate shaft 6 is located between the internal bearing 7 and the external bearing 8A of the intermediate shaft 6 at a position near the internal bearing 7.
Non-contact type internal displacement sensor 92 for measuring the height He of the engine is installed at a fixed height from the mounting surface 20, and the non-contact type for measuring the height Ho of the intermediate shaft 6 at a position near the external bearing 8A. An outside-engine displacement sensor 93 is installed at a fixed height from the installation surface 20. Then, based on the detection values of the engine-side displacement sensor 92 and the outside-engine displacement sensor 93, the centering control device 9 adjusts the displacement (Δh = He−Ho) to 0.
1 controls the drive of the elevation drive motor 30. As a result, the height of the external engine bearing 8A is adjusted, and the intermediate shaft 6 is prevented from hitting against the external engine bearing 8A.

According to the fourth embodiment, since the displacement data of the intermediate shaft 6 can be reliably obtained by actual measurement even without the data of the hull 1, accurate centering can be performed. Further, the data of the intermediate shaft control device 91 is recorded on the diagnostic recording device 94 and used for the advance diagnosis for obtaining the characteristic data for the alignment of the intermediate shaft 6 by the intermediate shaft alignment control device 91. This makes it possible to select an appropriate intermediate shaft alignment device from the first to third embodiments and use it in combination therewith.

[0025]

As described above, according to the first aspect of the present invention, the engine temperature state height calculation unit calculates the temperature inside the propulsion engine, the temperature outside the engine, the height of the intermediate shaft, and the thermal expansion data. Calculates the height of the internal bearings of the engine, thereby driving the bearing lifting drive to adjust the vertical position of the external bearings. It is possible to accurately control the vertical position of the shaft outside the engine bearing, and to prevent the intermediate shaft from hitting the outside engine bearing.

According to the second aspect of the present invention, the height of the bearing in the engine is calculated by the load height calculating unit based on the draft depth on the bow side and the stern side, the intermediate shaft distance and the rigidity of the hull. The vertical position is adjusted by driving the bearing elevating drive device, so that the position of the external bearing of the intermediate shaft can be accurately controlled in response to the hull deformation due to the load of the load. Can be prevented.

According to the third aspect of the present invention, the internal temperature of the propulsion engine, the external temperature of the engine, the height data of the intermediate shaft, and the thermal expansion data of the intermediate shaft are used by the engine temperature state height calculation unit to calculate the bearing temperature in the engine. And the load height calculation unit calculates the height of the internal bearings based on the draft depth on the bow and stern sides, the intermediate shaft distance, and the rigidity of the hull, and drives the bearing lifting drive The position of the outer bearing of the intermediate shaft can be accurately controlled in response to the thermal deformation of the internal bearing of the engine due to the temperature rise of the engine and the deformation of the hull due to the load of the load. Thus, it is possible to prevent the intermediate shaft from colliding with the external bearing.

Further, according to the fourth aspect of the present invention,
The vertical displacement of the intermediate shaft is measured directly between the engine side and the outside of the engine, and based on these measured values, the bearing vertical drive is controlled by the intermediate shaft alignment control device to adjust the vertical position of the external bearing. Therefore, the position of the external bearing can be accurately adjusted in accordance with the actual inclination of the intermediate shaft, and the intermediate shaft can be prevented from hitting against the external bearing.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first embodiment of an intermediate shaft centering device according to the present invention and showing a hull.

FIG. 2 is a layout view showing an intermediate shaft of the intermediate shaft alignment device.

FIG. 3 is an explanatory diagram showing an inclination of an intermediate shaft of the intermediate shaft alignment device.

FIG. 4 is a front cross-sectional view showing an external-engine bearing and a bearing lifting / lowering drive device of the intermediate shaft centering device.

FIG. 5 is a side view showing the external bearing and the bearing lifting drive.

FIG. 6 is a configuration diagram showing an intermediate shaft alignment control device of the intermediate shaft alignment device.

FIG. 7 is a front view showing a modified example of the bearing lifting drive device of the intermediate shaft centering device.

FIG. 8 shows a second embodiment of the intermediate shaft alignment device according to the present invention, and is a configuration diagram of the intermediate shaft alignment control device.

FIG. 9 shows a third embodiment of the intermediate shaft alignment device according to the present invention, and is a configuration diagram of the intermediate shaft alignment control device.

FIG. 10 is a configuration diagram showing a fourth embodiment of the intermediate shaft centering device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Diesel engine 3 Crank journal 6 Intermediate shaft 7 In-engine bearing 8A Out-engine bearing 10 Propeller drive shaft 11 Stern tube bearing 20 Installation surface 21, 64 Bearing elevating drive device 32 Bearing height detector 41, 71, 81, 91 Intermediate shaft alignment control device 51 Engine temperature height calculation unit 52 In-engine thermometer 53 Outside engine thermometer 61 Load-load height calculation unit 62 Bow-side draft depth detector 63 Stern-side draft depth detector

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Rishi Ashida 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (72) Inventor Tadashi Kawasaki 1 Minami-Kohoku, Suminoe-ku, Osaka-shi, Osaka No.7-89, Hitachi Zosen Corporation

Claims (4)

[Claims] An internal bearing in a propulsion engine and an external engine bearing outside a propulsion engine are connected between an output shaft of a propulsion engine mounted on a rear part of a hull and a propeller drive shaft supported on a stern tube bearing. An intermediate shaft aligning device for a marine engine that adjusts the inclination of the intermediate shaft supported by the above, comprising: a bearing elevating drive device that supports the external bearing of the intermediate shaft so as to be able to move up and down; and driving the bearing elevating drive device. An intermediate shaft centering control device, which includes a propulsion engine temperature, an outside engine temperature near the intermediate shaft, intermediate shaft height data, and intermediate shaft thermal expansion data. An engine temperature height calculating unit for calculating a change amount of the relative height of the internal bearing with respect to the tube bearing; and a height change command unit for outputting an adjustment height of the external engine bearing based on the calculated value. An intermediate shaft alignment device for a marine engine, comprising: 2. A propulsion engine mounted at the rear of the hull, which is connected between an output shaft of the propulsion engine and a propeller drive shaft supported by a stern tube bearing, and which has an internal engine bearing inside the propulsion engine and an external engine outside the propulsion engine. An intermediate shaft aligning device for a marine engine that adjusts the inclination of an intermediate shaft supported by a bearing, comprising: a bearing elevating drive device that supports an external engine bearing of the intermediate shaft so as to be able to move up and down; and a bearing elevating drive device. An intermediate shaft centering control device to be driven, the intermediate shaft centering control device includes: a measured value of a draft depth on a bow side, a measured value of a draft depth on a stern side, intermediate shaft distance data, and a bow of a hull;
A load-load height calculating unit that calculates a change in the relative height of the internal bearing with respect to the stern tube bearing from the stern stiffness data; and outputs the adjusted height of the external engine bearing based on the calculated value. An intermediate shaft aligning device for a marine engine, comprising a height change command unit. 3. A propulsion engine mounted at the rear of the hull, connected between an output shaft of the propulsion engine and a propeller drive shaft supported by a stern tube bearing, and having an internal engine bearing within the propulsion engine and an external engine outside the propulsion engine. An intermediate shaft aligning device for a marine engine that adjusts the inclination of an intermediate shaft supported by a bearing, comprising: a bearing elevating drive device that supports an external engine bearing of the intermediate shaft so as to be able to move up and down; and a bearing elevating drive device. An intermediate shaft centering control device to be driven, the intermediate shaft centering control device includes: a measured value of a draft depth on a bow side, a measured value of a draft depth on a stern side, intermediate shaft distance data, and a bow of a hull;
A load height calculator that calculates the change in the relative height of the engine bearing with respect to the stern tube bearing from the stiffness data in the stern direction, and the measured values of the draft depth at the bow and the measured values of the draft depth at the stern From the axial distance data and the rigidity data of the hull in the bow-stern direction,
A load-load height calculating unit that calculates a change amount of the relative height of the engine-side bearing with respect to the stern tube bearing; and a height change amount command unit that outputs an adjustment height of the outer engine bearing based on the calculated values. An intermediate shaft alignment device for a marine engine, comprising: 4. A propulsion engine mounted at the rear of the hull, connected between an output shaft of the propulsion engine and a propeller drive shaft supported by a stern tube bearing, and having an internal engine bearing within the propulsion engine and an external engine outside the propulsion engine. An intermediate shaft aligning device for a marine engine that adjusts a tilt of an intermediate shaft supported by a bearing, a bearing elevating drive device that supports an external bearing of the intermediate shaft so as to be able to move up and down, the internal bearing and the engine. An engine-side shaft displacement sensor and an engine-side shaft displacement sensor that measure the height of the intermediate shaft between the outer-side shaft bearing and an outer shaft-displacement sensor based on the output values of the engine-side shaft displacement sensor and the engine-side shaft displacement sensor. An intermediate axis alignment device for a marine engine, comprising: an intermediate axis alignment control device that drives a driving device.