JP2552460B2 - Water absorption device for ship propulsion - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a water absorbing device for a ship propulsion device, and more particularly to a water absorbing device for a ship propulsion device that can reliably prevent a water intake port from being blocked by suspended matter.

[Prior art]

In a conventional propulsion device such as an outboard motor or an inboard motor, a propulsion casing is attached to the lower side of the engine, a water pump is disposed in the propulsion casing, and water intake ports are provided on both sides of the propulsion casing. External water is introduced into the water pump in the casing from the water intake through the water intake passage, and the external water discharged from the water pump is supplied to a cooled part such as an engine to cool the engine. Equipped with a device (eg,
JP-A-59-20794), the propulsion casing is provided with recesses around the water intakes on both outer sides thereof, and the water inlet cover is constituted by a plate body having a plurality of water introduction holes. Is a plate body bent into a letter-letter shape, an opening corresponding to the water intake is provided in the vertical portion of the letter-letter shape of the protector, and a large number of water passage holes are provided in the inclined portion of the letter-letter of the protector. The vertical portion of the letter L and the water inlet cover are overlapped, the overlapped portion is fitted in the recess, the protector and the water inlet cover are fixed to the propulsion casing, and the inclined portion of the letter L of the protector is the water inlet. The water that flows along the outer periphery of the casing is arranged so that it projects outward from the outer surface of the propulsion casing on the upstream side of the cover and is inclined toward the downstream side. Even if algae that bend along the outer surface of the casing and move along the outer surface of the casing are caught by the casing, the algae are deflected outward by the protector, and the water inlet holes of the water inlet cover are blocked by the algae. It is possible to prevent the occurrence of engine overheating, seizure, etc. due to insufficient intake of cooling water.

[Problems to be Solved by the Invention]

Since the propulsion casing, the water inlet cover, and the protector are each composed of a separate member, the above-described conventional marine vessel propulsion machine has drawbacks that the number of parts is increased, the assembly is troublesome, and the manufacturing cost is increased. In addition, the L-shaped inclined portion of the protector is arranged so as to project outward from the outer surface of the propulsion casing on the upstream side of the water inlet cover and be inclined toward the downstream side. Even if there is a hole, when the ship is sailing, the resistance of the plate-shaped protector increases the running resistance, hinders the high-speed running of the ship, and wastes energy. is there. The problem to be solved by the present invention is to provide a water absorbing device for a ship propulsion machine which does not have the above-mentioned drawbacks of conventional ship propulsion machines. In other words, the structure is simple, the production is easy, and the suspended matter is It is possible to reliably prevent the blockage of the water intake due to
Another object of the present invention is to provide a water absorbing device for a ship propulsion device that does not hinder high-speed traveling of a ship.

[Means for Solving the Problems]

The present invention provides, as means for solving the above problems,
The following configuration is adopted. According to the configuration of the present invention, the engine is provided on the upper side of the propulsion casing, the propeller shaft is provided in the lower part of the submerged portion of the propulsion casing in the front-rear direction, the propeller is attached to the propeller shaft, and the propeller shaft is provided by the engine. It is driven, a water pump is installed in the propulsion casing, a plurality of water intakes are provided on the side surface of the submerged part of the blade shape of the propulsion casing, and outside water is introduced from the water intake through the water intake path into the water pump. In the marine vessel propulsion machine, in which the external water introduced into the engine and discharged from the water pump is sent to the cooled part of the engine, and the engine is cooled, a plurality of water is projected from the side surface of the propulsion casing to the side surface of the submerged portion of the propulsion casing. Ridges are provided, each ridge extends in the front-rear direction on the side surface of the propulsion casing, and the water intake is provided between the upper ridge and the lower ridge. The watercraft propulsion device is formed in the portion of the guide, and a side surface of the propulsion casing, an upper protruding portion and a lower protruding portion form a water conduit for guiding outside water to the water intake. In the water absorption device. In addition, in the embodiment described later, the ridge portion is formed continuously along the entire outer circumference of the propulsion casing along the basic outline forming the blade cross-sectional shape of the propulsion casing. It may not be formed continuously.

[Work]

In the water absorbing device for a ship propulsion device of the present invention, a plurality of ridges are provided on the side surface of the submerged portion of the propulsion casing so as to project from the side surface of the propulsion casing. A water inlet is opened in the part of the propulsion casing between the upper and lower ridges, and the side surface of the propulsion casing, the upper ridge and the lower ridge allow outside water Since a water conduit for guiding the water to the water intake is formed, the presence of the ridges above and below each water intake prevents suspended matter from flowing in contact with the side surface of the propulsion casing. The side surface of the casing, the upper ridge portion and the lower ridge portion always form a water conduit, so that the water intake port formed on the side surface of the propulsion casing is not blocked by floating matter. In addition, a plurality of ridges are provided on the side of the submerged portion of the propulsion casing so as to project from the side of the propulsion casing.Each ridge extends in the front-back direction of the side of the propulsion casing, and the water intake port is located on the upper side. It is opened in the part of the propulsion casing between the ridge and the lower ridge, and the direction of each ridge is approximately the same as the direction of water flow when the vessel is running. Can be avoided.

【Example】

The embodiment is shown in FIGS. 1 to 5 and is an example in which the present invention is applied to a water absorbing device for an outboard motor. The outboard motor 10 can be attached to the hull via a mounting bracket 11. A mounting bracket 11 is fixed to the front side of the upper portion of the propulsion casing 12, and an engine 13 is attached to the upper side of the propulsion casing 12. The submerged portion of the propulsion casing 12 is provided with a basic outer shape line 12A whose cross-sectional shape is a blade cross-sectional shape. The engine 13 has a drive shaft 14,
A propeller shaft 17 is driven via a forward / reverse switching gear device 15 and a propeller shaft 16. The propeller shaft 16 is a propulsion casing 12
Is disposed in the lower part of the submerged portion in the front-rear direction, and the propeller 17 is attached to the rear portion of the propeller shaft 16. The propulsion casing 12 is attached to the hull so as to be tiltable around a tilt shaft 18 provided on the mounting bracket 11, and has either a tilt-down position shown by a solid line in FIG. 1 or a tilt-up position shown by a chain line. The position can be set. A water pump 19 is arranged inside the propulsion casing 12,
This water pump 19 has an upper housing as shown in FIG.
20, a lower housing 21, and a partition plate 22 interposed between the upper and lower housings, and is inserted into the inner peripheral portion of the upper housing 20.
23 is fitted and the partition plate 22 and the insert 23 form an impeller chamber 24 around the drive shaft 14, and the impeller 25 fixed to the drive shaft 14 is accommodated in the impeller chamber 24. The lower housing 21 of the water pump 19 includes a water suction port 26 and a water discharge port 27 that communicate with the impeller chamber 24. The water inlet 26 is
Propulsion casing 12 through tubular water suction channel 28B and water suction channel 28A
Multiple water intake openings on both left and right sides of the submerged area
Communicates with 29. Further, the spout 27 is provided on the upper housing 20.
To a water jacket 30 of the engine 13 via a water discharge pipe 27A that communicates with the water discharge hole. The water pump 19 is driven by the drive shaft 14 associated with the operation of the engine 13.
Driven by the rotation of, the external water taken in from a large number of water intake 29 is pumped to the water jacket 30 of the engine 13,
Add the function of cooling the engine 13. A plurality of portions of the propulsion casing 12 of the outboard motor 10 having a blade cross-section slightly above the portion where the propeller shaft 16 is disposed are provided in the vertical direction at intervals behind the both side portions (see FIG. 1). There are 4 water intakes 29 on each side. Protrusions 31 are formed on the upper and lower sides of each water intake port 29 so as to project from the side surface of the propulsion casing 12. Each ridge 31
Is extending in the front-back direction on the side surface of the propulsion casing 12,
It is formed continuously along the entire circumference of the propulsion casing 12 along a basic outer shape line 12A that forms the blade cross-sectional shape of the propulsion casing 12. Therefore, the side surface of the propulsion casing 12, the upper protruding portion 31 and the lower protruding portion 31 form a water conduit 100 for guiding outside water to the water intake 29. The outboard motor 10 of the embodiment has the following operational effects. A plurality of ridges 31 are provided on the side surface of the submerged portion of the propulsion casing 12 so as to project from the side surface of the propulsion casing.
Each ridge portion 31 extends in the front-rear direction on the side surface of the propulsion casing 12, and the water intake port 29 is opened in the portion of the propulsion casing 12 between the upper ridge portion 31 and the lower ridge portion 31, Since the direction of the ridges 31 and the direction of water flow at the time of traveling of the ship are substantially the same, it is possible to avoid an increase in running resistance due to the ridges 31 and to enable high-speed running of the ship. Since the protrusions 31 projecting from the side surface of the propulsion casing 12 are located above and below the water intake port 29, the presence of the protrusions 31 prevents suspended matter from flowing in contact with the side surface of the propulsion casing 12. The side surface of the propulsion casing 12, the upper protrusion portion 31 and the lower protrusion portion 31 always form a water conduit 100 for guiding water to the water intake 29, and a plurality of water intakes opened on the side surface of the propulsion casing 12. The entrance 29 is not blocked by floating material. Since the ridge portion 31 is continuously formed from the front portion of the propulsion casing 12 to the rear portion through the upper side or the lower side of the water intake 29 on the side surface thereof, the surface of the propulsion casing 12 and the upper ridge portion are formed.
The lower surface of 31 and the upper surface of the lower protruding portion 31 form a water conduit 100, and the external water flowing into this water conduit 100 can flow smoothly to the water intake 29 without interruption. . A plurality of ridges 31 are provided on the side surface of the propulsion casing 12 so as to project from the side surface of the propulsion casing. Each of the ridges 31 extends in the front-rear direction of the side surface of the propulsion casing. Since it is only necessary to provide the water intake port 29 in the part of the propulsion casing 12 between the line part 31, the structure of the propulsion casing for taking in external water is simplified, and no separate part for taking in external water is required. This makes it easier to manufacture. In addition, the outboard motor 10 is, as shown in FIG. 1 and FIG.
A screen 32 is provided at an intermediate portion of the water suction passage 28A, and the screen 32 has a tongue portion 34 having a hole 33, as shown in FIG.
An engaging base portion 35 and a pair of engaging claw portions 36 which are U-shaped and can be elastically displaced. Screen 32
As shown in FIG. 3, the mounting portion 37 provided on the propulsion casing 12 can be detached from the side surface of the propulsion casing 12 with the pair of engaging claw portions 36 contracted and deformed. . The screen 32 in the mounted state is fixed to the mounting portion 37 by the engaging base portion 35 and the engaging claw portion 36. As a result, despite the fact that the water intake ports 29 are opened on both side surfaces of the propulsion casing 12, it is possible to capture dust in the outside water with the single screen 32, and without providing mounting means such as bolts. , Screen 32 can be installed. In the outboard motor 10, as shown in FIG. 5, the water intake port 26 provided in the lower housing 21 of the water pump is formed in the front portion of the lower housing corresponding to the front of the drive shaft 14, and the propulsion casing 12 is provided. When tilted up (in the state shown by the chain double-dashed line in FIG. 1), the water in the impeller chamber 24 is drained to the side of the water suction passage 28B without staying. Therefore, when the propulsion casing 12 is stored in a tilted-up state, metal members such as the partition plate 22 and the insert 23 are corroded by accumulated water, and the impeller 25 is damaged during restart due to freezing of accumulated water. It is possible to prevent the inconvenience. When the propulsion casing 12 is tilted up, the outboard motor 10 has a water intake port 2 without water remaining inside the water intake passage 28B.
An appropriate slope is provided in the middle of the water intake channel 28B so that the water is drained from 9.

【The invention's effect】

The water absorbing device for a marine vessel propulsion device of the present invention has the following effects (a) to (d) by including the configuration described in the claims. (A) A plurality of protrusions are provided on the side surface of the submerged portion of the propulsion casing so as to protrude from the side surface of the propulsion casing.
Each ridge extends in the front-back direction on the side surface of the propulsion casing, and a water intake is provided in the portion of the propulsion casing between the upper ridge and the lower ridge, and Since the direction substantially coincides with the flow direction of water when the vessel is traveling, it is possible to avoid an increase in traveling resistance due to the ridges, and it is possible to travel at high speed. (B) The side of the propulsion casing, the upper ridges, and the lower ridges form a water conduit for guiding the external water to the water intake. It can be flowed smoothly without interruption. (C) Since the ridges protruding from the side surface of the propulsion casing are located above and below the water intake, the presence of these ridges prevents suspended matter from flowing in contact with the side surface of the propulsion casing. , The side surface of the propulsion casing, the part surrounded by the upper ridges and the lower ridges, the water conduit that always leads water to the water intake, It is not blocked by suspended matter. (D) A plurality of ridges are provided on the side surface of the propulsion casing so as to project from the side surface of the propulsion casing, and each ridge extends in the front-rear direction on the side surface of the propulsion casing. Since it is only necessary to provide a water intake port in the part of the propulsion casing between the part and the section, the structure of the propulsion casing for taking in external water is simplified, and a separate part for external water intake like the prior art is provided. It becomes unnecessary and the production becomes easy.

[Brief description of drawings]

1 is a side view of the outboard motor of the embodiment, FIG. 2 is a plan view of the one shown in FIG. 1 taken along the line II-II, and FIG. 3 is a main part of the one shown in FIG. FIG. 4 is a plan view showing a cross section taken along line III-III, FIG. 4 is a side view showing a part of the screen in a cross section, and FIG. 5 is a side view showing a main part of the screen shown in FIG. Is. 10 ... Outboard motor, 12 ... Propulsion casing, 14 ... Drive shaft 18 ... Tilt shaft, 19 ... Water pump, 20 ... Upper housing 21 ... Lower housing, 26 ... Water inlet, 28A, 28B …… Water intake 29 …… Water intake, 31 …… Projection, 32 …… Screen 100 …… Headrace

Claims (1)

(57) [Claims] 1. An engine is provided on an upper side of a propulsion casing, a propeller shaft is provided in a lower portion of a portion of the propulsion casing submerged in water, a propeller is attached to the propeller shaft, and the propeller shaft is driven by the engine. A water pump is installed inside the propulsion casing, and multiple water intakes are provided on the side surface of the submerged portion of the blade cross-sectional shape of the propulsion casing, and outside water enters the water pump from the water intake through the water intake passage. In the marine vessel propulsion system, in which the external water introduced and discharged from the water pump is sent to the cooled part of the engine, and the engine is cooled, a plurality of submerged parts of the propulsion casing are projected on the side surface of the submerged part of the propulsion casing. A ridge portion is provided, each ridge portion extends in the front-rear direction on the side surface of the propulsion casing, and the water intake port of the propulsion casing is located between the upper ridge portion and the lower ridge portion. Water absorption of a ship propulsion device, characterized in that a water conduit for guiding outside water to the water intake is formed by the side surface of the propulsion casing, the upper protrusion and the lower protrusion. apparatus.