JPH086716Y2 - Lubricating oil idle pump for speed reducer / reverse gear for ships - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) In the present invention, an output large gear, which is on the propeller shaft side of the clutch and which idles with the propeller shaft during idling, is arranged in the reduction / reverse gear case. The present invention relates to an idling pump for a marine speed reducer / reverse gear, which includes a baffle plate that covers a lower half portion of the large gear.

(Prior Art) When a ship is towed, when it sails by inertia, when it sails, or when a ship equipped with two engines and two propeller shafts has one engine and one propeller. When navigating only by axis, etc.,
With the engine stopped and the clutch disengaged,
As a result, the propeller shaft is idling. During such idling, the lubricating oil pump equipped with the reduction / reverse gear is stopped, so that the portion of the reduction / reverse gear that idles together with the propeller shaft may be seized.

Therefore, there is a conventional one in which a free-running pump interlocking with the free-running part is attached to the reduction / reverse gear case, and the free-running pump is used to supply the lubricating oil to the lubrication location during free-running. It is disclosed in Kaisha 61-70271 or Japanese Patent Publication No. 2-20479.

In Japanese Patent Laid-Open No. 61-70271, an idle pump is provided above the shaft center of an output large gear, and an external gear is provided separately on the side of the large gear, and a drive gear of the idle pump is meshed with this external gear.

In Japanese Patent Publication No. 20479/1990, similarly, an idle pump is provided above the shaft center of the output large gear, and the drive gear of the idle pump is driven from the output large gear via the forward gear and the intermediate gear.

(Problems to be solved by the invention) When the idling pump is arranged above the shaft center of the large gear, the head (lift) of the idling pump with respect to the oil level in the case becomes large. Therefore, when installing the idling pump,
Since it is necessary to fill the pump and suction pipes with oil in advance, the installation work is troublesome. Moreover, the large head (lift) reduces pump efficiency.

Further, since the idling pump is provided at a position higher than the oil level, the lubricating oil in the case cannot be used directly for lubrication of the idling pump, and the bearing for the drive part in the idling pump or the pump drive shaft is used. Special piping to parts is required.

(Technical Means for Solving the Problems) In order to solve the above problems, the present invention provides a large output gear in a reduction / reversing machine case, which is on the propeller shaft side of a clutch and idles together with a propeller shaft during idling. In the marine reduction and reversing machine, in which the lower half portion of the large gear is covered with a baffle plate, a lubricating oil idle pump different from the machine-equipped lubricating oil pump is installed below the large gear's shaft core and At least a part of the rotary pump is fixed to the above case at a height that allows it to enter the oil surface of the reduction / reverse gear case, an internal gear is provided inside the rim of the large gear, and it is fixed to the pump drive shaft of the idle pump. The pump driving gear is projected into the baffle plate and meshes with the internal gear of the large gear in the baffle plate.

(Operation) When the propeller shaft is rotating by the engine, the machine-equipped lubricating oil pump is operating, which supplies the lubricating oil to each lubrication point in the reduction / reverse gear.

When the propeller shaft is idling due to towing etc., the engine lubrication oil pump is stopped due to engine stop, but the idling pump is operated by the internal gear of the output large gear, which causes Supply lubrication oil to the idle position.

(Embodiment) FIG. 3 shows an example of a two-machine two-shaft ship equipped with a speed reducer / reverse gear according to the present invention. Inside the hull 1, a pair of left and right engines 2 and 3 are mounted. The output-side flywheel of 3 has a reduction / reverse gear 8 through elastic joints 6 and 7,
9 are interlockingly connected, and output shaft 1 of reduction / reverse gears 8 and 9
Propeller shafts 12 and 13 are linked to 0 and 11, respectively. The reduction / reverse gears 8 and 9 are provided with machined lubricating oil pumps 4 and 5, respectively. The right engine is an engine that rotates right when viewed from the rear of the hull, and the left engine is an engine that rotates right when viewed from the rear of the hull. Also the right propeller shaft 13
Rotates to the right and the left propeller shaft 12 rotates to the left, whereby the hull 1 advances. Reversible lubricating oil idle pumps 14 and 15 are attached to the speed reduction / reverse gears 8 and 9 separately from the machined lubricating oil pumps 4 and 5, respectively.

The two deceleration reversing machines 8 and 9 have the same structure except that the right and left sides are opposite to each other. Therefore, the structure of the right deceleration reversing machine 9 will be described with reference to FIGS. 4 and 5. In FIG. 4, the reduction / reverse gear case is composed of a lower case 16, an upper case 17 and a case lid 18.
The inside is an oil sump, and oil is accumulated up to the height of the oil level L, and an upper open semicircular box-shaped baffle plate 20 that covers the lower half portion of the output gear 35 is detachably fixed. The baffle plate 20 has one or more oil holes formed therein so that the same oil level as the oil level L in the case can be maintained in the baffle plate 20.

The input shaft 21 on the front side is provided coaxially with the output shaft 11 on the rear side, and an input gear 23 is integrally provided. A pair of forward shafts 24 are arranged above the left and right sides of the input shaft 21, and a reverse shaft 26 is arranged almost directly above the input shaft 21, and are rotatably supported by the upper case 17. A forward gear 27 is fixed to the forward shaft 24, and a reverse gear 29 is fixed to the reverse shaft 26.
Always meshes with the input gear 23, and the reverse gear 29 meshes with the forward gear 27. The reverse gear 29 does not mesh with the input gear 23.

In FIG. 5, a forward pinion 31 is rotatably fitted to the rear portion of the forward shaft 24 via a brain bush 30.
The forward pinion 31 is intermittently connected to the forward shaft 24 by a forward clutch 37. A reverse pinion 33 is rotatably fitted to the rear part of the reverse shaft 26 via a brain bush 32,
The reverse pinion 33 is intermittently connected to the reverse shaft 26 via a reverse clutch 39.

The forward pinion 31 and the reverse pinion 33 always mesh with the output large gear 35, the output large gear 35 is fixed to the output shaft 11, and the lower half portion thereof is the baffle plate 20 as described above.
It is housed inside and the lower end is immersed in lubricating oil.

FIG. 1 is an enlarged vertical cross-sectional view of the lubricating oil idle pump 15 (I-I cross-sectional view of FIG. 4). The idle pump 15 has a cylindrical bearing case on the front surface of the idle shaft 15 having a pump shaft core O2 and a coaxial core. 47 are integrally connected, and a pair of front and rear bearings 48, 49 are provided in the bearing case 47.
Is fixed, and the pump drive shaft 43 is supported on the inner circumferences of both bearings 48, 49. The rear end of the pump drive shaft 43 is an Oldham joint
A pump drive gear 44 is fixed to the front end of the pump drive shaft 43 by interlockingly connecting to the pump shaft in the idle pump via 51.

The idle pump 15 is located below the shaft center O1 of the output large gear 35, and is arranged such that at least the pump shaft center O2 portion (generally the head portion) is below the oil level, and the lower case 16 It is fixed to the rear of the car. The bearing case 47 fits into the mounting hole 57 of the lower case 16 via the O-ring 55 and projects into the lower case 16, and further, the baffle plate rear wall
It penetrates through the insertion hole 58 of 20a and protrudes into the baffle plate 20, so that the drive gear 44 is moved to the baffle plate 20.
It is located inside and part of it is immersed in the oil surface. The bearings 48 and 49 are also immersed in the oil surface.

On the other hand, an internal gear (ring gear) 45 is press-fitted and fixed to the inner peripheral surface of the rim 36 of the output large gear 35, and the pump drive gear 44 meshes with the internal gear 45.

An annular seal 50 having a V-shaped cross section is fixed to the outer peripheral surface of the front end portion of the bearing case 47, and the front end edge of the seal 50 abuts on the rear wall 20a of the baffle plate and performs the sealing function of the mounting hole 58 portion. .

At the lower end of the lower case 16, a suction pump suction pipe 54 is connected via a strainer 59, and the suction pipe 54 is connected to an oil inlet 60 in the lower half of the rotation pump 15 as shown in FIG. Connected. A check valve 56 is connected to the oil discharge port 61 in the upper half of the idle pump 15, and the check valve 56, which is not shown, prevents the backflow from the lubricating oil pump with the engine when the engine is operating and when the engine is stopped. The operation of supplying the lubricating oil from the idle pump to each of the idle lubricating points such as the bushes 30 and 32 shown in FIG. 5 will be described. When traveling forward, both forward clutches 37 of the speed reducer / reverse gear 15 shown in FIG. 5 are turned on, and the lubricating oil reverse clutch 39 is turned off. Power from engine 3 is input shaft 2
From 1, input gear 23, forward gear 27, forward clutch 3
7, transmitted to both forward pinion 31, output large gear 35 and output shaft 11, the right propeller shaft 13 in FIG. 3 rotates to the right. Similarly, the left propeller shaft 12 rotates counterclockwise by operating the left reduction / reverse gear 14 by operating the clutch.

Lubricating oil pumps 4 and 5 and idle pumps 14 and 15 at this time
Rotate together, and the lubricating oils from the machine-equipped lubricating oil pumps 4 and 5 lubricate each lubrication point.

When going in reverse, both forward clutch 37 are turned off, and reverse clutch 39 is turned on. Power from engine 3 is input shaft
From 21, to the input gear 23, the reverse gear 29, the reverse clutch 39, the reverse pinion 33, the output large gear 35 and the output shaft 11,
The propeller shaft 13 rotates counterclockwise. Left deceleration reverse gear 14 in Fig. 3
Similarly, the reverse rotation is performed and the left propeller shaft 12 rotates right.

At this time, the lubrication oil pumps 4 and 5 lubricate each part in the same manner as when the vehicle is moving forward.

When navigating with only one axis, for example, when the right engine 3 in FIG. 3 is stopped and navigating only with the left engine 2 and the left propeller shaft 12, each clutch 37 of the right reduction gear reverser 15 in FIG. Since 39 is switched to OFF, the right propeller shaft 13 idles, which causes the output shaft 11, the output gear 35, both forward pinions 31 and reverse pinion 33 to idle.

At this time, the right side machine-equipped lubricating oil pump 5 (Fig. 3) is stopped, but since the output large gear 35 in Fig. 4 is idling, the internal gear 45 causes the pump drive gear 44 and the pump drive shaft to rotate. 43
The idle pump 15 of FIG. 5 is driven via the. As a result, the bushes 30, 32, etc., are lubricated at their free rotation points.

(Another embodiment) The illustrated embodiment is an example applied to a two-shaft type ship equipped with two engines and two propeller shafts.
It can also be applied to a single-axis ship.

(Effects of the Invention) As described above, according to the present invention, even when the propeller shaft 13 is in the idling state, the lubricating oil idling pump 15 can supply the lubricating oil to each lubrication point to prevent seizure. In addition, it has the following effects.

(1) Position the lubricating oil idling pump 15 below the shaft center O1 of the output large gear 35 and at such a height that at least a part of the idling pump 15 can enter the oil level in the case. Since the difference between the oil level and the head of the idling pump 15 is eliminated or becomes extremely small, it is not necessary to fill the pump and suction pipes with oil when the idling pump is assembled, and the installation work is simple. .

(2) Since the lubricating oil idling pump 15 is positioned at a height such that at least a part of the lubricating oil idling pump 15 can generally fit within the oil surface, the bearing 48 for the drive unit and the pump drive shaft in the idling pump 15, 49 and the like are constantly lubricated by the oil in the oil sump to prevent seizure of the idling pump, and the lubrication pipes for the bearings 48 and 49 are not required.

(3) Since the head difference (lifting height) between the oil level and the idle pump 15 is almost eliminated, oil can be efficiently sucked in and discharged even with a small pump.

(4) Since the internal gear 45 is provided inside the rim 36 of the large gear 35 and the pump drive gear 44 is meshed with this, the large gear 35
It is possible to effectively use the space on the inner periphery of the and to achieve compactness.

(5) Since the pump drive gear 44 meshes with the large gear 35 in the baffle plate 20, it is possible to prevent the generation of bubbles in the oil sump, which affects the oil suction of other pumps from the case. Absent.

[Brief description of drawings]

Fig. 1 is a partial vertical sectional view of a speed reducer / reverser for a ship to which the present invention is applied, Fig. 2 is a view taken along arrow II of Fig. 1, Fig. 3 is a schematic plan view of a ship, and Fig. 4 is a vertical cross section of the speed reducer / reverser. FIG. 5 is a development view of the VV cross section of FIG. 2, 3 ... engine,
8, 9 ... Decelerator / reverse gear, 12, 13 ... Propeller shaft, 14, 15
...... Lubricating oil idle pump, 16, 17 ...... Lower case, Upper case (reduction gear reverser case), 20 …… Baffle plate,
35 …… output gear, 36 …… rim, 37 …… forward clutch,
39 …… reverse clutch, 43 …… pump drive shaft, 44 …… pump drive gear, 45 …… internal gear, 47 …… bearing case

Claims (1)

[Scope of utility model registration request] 1. A deceleration / reverse gear case is provided with an output large gear that is closer to a propeller shaft than a clutch and that rotates with a propeller shaft when idling, and a lower half portion of the large gear is covered with a baffle plate. In a marine reduction / reversing machine, install a lubricating oil idling pump, which is separate from the lubricating oil pump with a machine, below the axis of the large gear and at least a part of the idling pump is inside the oil surface of the decelerating / reversing machine case. It is fixed to the above case at a height that can be entered, an internal gear is provided inside the rim of the large gear, and the pump drive gear fixed to the pump drive shaft of the idle pump is projected into the baffle plate to A lubricating oil idle pump for a speed reducer / reverser for ships, characterized by meshing with the internal gear of a large gear.