JP2516770Y2 - Peripheral type lubricator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a peripheral type oil supply device capable of supplying oil to an oil passage along a central axis of a rotary shaft and a bearing device supporting the rotary shaft, in particular, The present invention relates to a peripheral surface type oil supply device for a rotating shaft, which is suitable as an oil supply device for an inner shaft bearing of a rotating shaft and an oil supply device for an intermediate bearing device of the rotating shaft in a shaft system of a contra-rotating propeller of a ship.

[Conventional technology]

2. Description of the Related Art Conventionally, as a peripheral surface type oil supply device for an inner shaft bearing of a rotary shaft, there is one as shown in FIGS.

That is, the rotary shaft 22 'is provided with an oil passage 19' along the central axis thereof and an oil supply hole 20 'radially branched from the oil passage, and the lower housing is provided around the rotary shaft 22'. A half-split housing A'consisting of 1'and upper housing 2'is provided.

The lower housing 1'and the upper housing 2'are firmly assembled by the reamer bolt 10 ', the jack bolt 11' and the mounting bolt 12 'at the axial center position.

The housing A'has a pair of bearing metals 3'as two rows of bearing members capable of relatively sliding along the outer peripheral surface of the rotary shaft 22 ', and each bearing metal 3'has a half-split structure. The roundness is secured.

An oil chamber 23 'is formed between the pair of bearing metals 3', and the oil chamber 23 'communicates with the oil supply hole 20' of the rotary shaft 22 '. The oil supply to the oil chamber 23 'is performed through the oil supply port 16' formed in the housing A '.

In the housing A ', a leak oil chamber 24' into which lubricating oil leaked from the bearing metal 3'can be introduced is formed on each outer side of the pair of bearing metal 3 ', and outside the leak oil chamber 24'. A baffle plate 6'protruding inside the housing A'and a check ring 5'protruding from the outer peripheral surface of the rotating shaft 22 'are provided as a sealing mechanism B'disposed between the rotating shaft 22'. The check ring 5'is arranged so as to be close to the side cover 4'of the housing A '. The side cover 4'is attached to the housing A'through bolts 13 '.

The housing A'is provided with an oil drain port 17 'for draining oil from the oil leak chamber 24', and also with an auxiliary oil drain port 18 '.

The lower housing 1'of the housing A'has a main body side holder 7'attached to the lowermost central portion thereof by means of mounting bolts 14 '.
Support side holder 8'fixed to 1'with mounting bolts 15 '
And a pin 9'to prevent the housing A'from moving in the axial direction.

On the other hand, the housing A'allows vertical movement so as to follow the vibration and inclination of the rotary shaft 22 '. As a means for this, a hole for inserting the pin 9'is formed as an elongated hole. A rubber plate may be interposed between the holders 7'and 8 '.

The lubricating oil supplied to the oil chamber 23 'through the oil supply port 16' is
The oil is supplied to the oil passage 19 'from the rotary shaft 22' through oil supply holes 20 'provided radially.

The housing A'has a floating structure that holds the rotating shaft 22 ', so that the gap between the bearing metal 3'is stable and the housing A'can follow the vibration and inclination of the rotating shaft 22'. Therefore, the amount of leaked oil is extremely small.

Further, there is an intermediate bearing for a rotating shaft as a propulsion shaft of a ship as shown in FIGS.

That is, the intermediate bearing includes the intermediate shaft 01, the lower casing 02,
The upper casing 03, the check ring 04, the split bearing bearing back 05, and the bearing metal 06 are formed. Lubricating oil 07 is introduced into the annular space 09 from the oil supply port 08 by forced lubrication, and the oil passage hole 010 communicating therewith is formed. Through the recess 011 of the bearing metal 06,
After lubricating the gap between the intermediate shaft 01 and the bearing metal 06, the check ring 04 at both ends seals the oil and the oil is discharged from the oil outlet 013 of the lower casing 02 into a lubricating oil tank (not shown). .

[Problems to be solved by the device]

By the way, when equipping both the peripheral type oil supply device and the intermediate bearing on the rotary shaft that connects the drive side and the load side, the equipment space must be considerably widened, which makes the arrangement difficult and makes the production and installation. The cost required for this is also high.

Especially in a marine counter-rotating propeller shaft system, the rotary shaft is branched at the stern side of the output end of the main engine into an inner shaft system and a hollow outer shaft system that encloses it, so that the center hole of the inner shaft is filled with oil. Must be equipped with both an oil supply device and an intermediate bearing to support the weight of the shaft system (accessories such as elastic joints and the self-weight of the shaft), in which case a large installation space is required. Depending on the situation, there is a problem that the main engine must be moved to the bow side to secure the space.

The present invention is intended to solve such a problem, and the peripheral surface type oil supply mechanism for supplying oil to the center hole for oil supply along the central axis and the (intermediate) bearing are formed by separate members. Together with these, they are integrated into a single unit, and oil can be supplied to the intermediate bearing by the peripheral surface type oil supply device, so that the installation space is reduced and the manufacturing and installation costs are reduced. An object is to provide a peripheral type oil supply device.

[Means for solving the problem]

In order to achieve the above-mentioned object, the peripheral type oil supply device of the present invention has a rotary shaft having a central hole for oil supply along a central axis and an oil supply hole radially branched from the central hole, and an outer side of the rotary shaft. A pair of bearing metals that are relatively slidable along the outer peripheral surface of the rotary shaft, and a casing that is disposed so as to form an annular auxiliary oil supply chamber inside. A floating ring having an oil supply chamber formed between the two and communicating with the oil supply hole is disposed in a floating manner in the annular auxiliary oil supply chamber, and the casing is composed of an upper casing and a lower casing. The lower casing is formed with an oil supply port communicating with the annular auxiliary oil supply chamber, the floating ring is formed with an oil passage communicating with the oil supply chamber and the outside of the floating ring, and the upper casing Bearing casings with semi-cracked lower ends and installation parts at the lower ends are joined to both ends of the housing and the lower casing, and bearing metal for rotating and holding the rotary shaft is attached to the inner peripheral surface of each bearing casing. The bearing casing closes both ends of the auxiliary oil supply chamber.

[Action]

In the above-mentioned peripheral surface type oil supply device of the present invention, the peripheral surface type oil supply mechanism for supplying oil from the outer peripheral surface of the rotary shaft to the central hole and the bearing for supporting the weight of the rotary shaft are formed by separate members, and Since both members are combined and integrally formed, the installation space can be significantly reduced.

Further, the bearing casing not only closes both ends of the casing of the oil supply device but also supports the weight of the rotating shaft, and the floating ring is restrained by the bearing casings at both ends, so that the vibration of the rotating shaft is suppressed. Lubricate the center hole while following the inclination.

〔Example〕

A peripheral type oil supply device as one embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view thereof, FIG. 2 is a sectional view taken along arrows AA and BB of FIG. FIG. 3 is a sectional view taken along the line CC of FIG.

The peripheral surface type oil supply device of this embodiment also has a configuration similar to that of the conventional example described above, and has a center hole 2 for oil supply along the central axis and an oil supply hole 3 radially branched from the center hole 2. Oil is supplied to the center hole 2 of the rotary shaft 1 as an inner shaft bearing, and is provided with an upper casing 4 and a lower casing 5 which are divided into two at a horizontal position of the shaft core and are joined by bolts 11.

An annular auxiliary oil supply chamber 8 is formed inside both casings 4 and 5, and a floating 9 is arranged in a floating manner in the auxiliary oil supply chamber. The floating ring 9 is connected by bolts 10 by half cracking, the bearing metal 6 is provided on the inner peripheral surface facing the rotating shaft 1, and the oil supply chamber 13 is provided at the position facing the oil supply hole 3 in the circumferential direction. To be The auxiliary oil supply chamber 8 communicates with the oil supply chamber 13 through oil passage holes 7 provided in the floating ring 9. On the other hand, the lower casing 5 is formed with a fuel filler port 18 communicating with the auxiliary fuel filler chamber 8,
Communicates with the piping 19 on board. Then, the upper casing 4, the lower casing 5, the auxiliary oil supply chamber 8, the floating ring 9 and the bearing metal 6, the oil supply chamber 13, and the oil passage hole 7
To form a peripheral lubrication mechanism.

Both ends of both casings 4 and 5 are closed by half-split bearing casings 20 and 21 that are firmly connected by bolts 12 to make the auxiliary oil supply chamber 8 oil-tight. Bearing casing
Bearing metals 23 are provided on the inner peripheral surfaces of 20, 21 to form an intermediate bearing. The installation portion formed at the lower end of the lower bearing casing 21 is attached to a hull (not shown) by bolts 22.

A knock pin 25 and an O-ring 24 are provided inside the bearing casings 20 and 21, and the knock pin 25 acts to prevent the floating ring 9 from being swung around by the rotational force of the rotary shaft 1, and the O-ring 24 is By contacting the end surface of the floating ring 9, the auxiliary oil supply chamber 8 acts to maintain the oil tightness.

A cover 15 is attached to the outer side of the bearing casings 20 and 21 with a bolt 14, and the lubricating oil leaked from the gap between the rotating shaft 1 and the bearing metal 23 is recovered by the action of the oil drainer 16 mounted on the rotating shaft 1. Guided to the oil drain port 17.

With the above configuration, the lubricating oil a supplied from the pipe 19
Is supplied to the center hole 2 of the rotary shaft 1 through the following path.

Piping 19 → Refueling port 18 → Auxiliary refueling chamber 8 → Oil passage hole 7 → Refueling chamber
13 → lubrication hole 3 → center hole 2 At this time, part of the lubricating oil a leaks to the cover 15 while lubricating the minute gap between the outer peripheral surface of the rotating shaft 1 and each bearing metal 6, 23, and the oil drain port Guided to 17.

 Here, the relationship of the amount of lubricating oil is: oil supply b to the center hole 2 + leakage oil c = oil supply a.

Since the amount of the leaked oil c increases as the pressure of the lubricating oil a increases, the leaked oil c can be reduced by further reducing the gap between the bearing metal 16 part of the floating ring 9 or lengthening the bearing metal 6 part. Can be reduced.

What is important here is that in this embodiment, the peripheral oil supply mechanism and the intermediate bearing are composed of separate members.

That is, the floating ring 9 constituting the peripheral surface type oil supply mechanism does not function to support the weight of the rotating shaft 1, but is arranged so as to float in the auxiliary oil supply chamber 8 as the name implies. Therefore, the load of the rotary shaft 1 does not act on the bearing metal 6, and the rotary shaft 1 and the bearing metal 6 are always concentric.

Therefore, the floating ring 9 can always follow the fluctuation (inclination) of the rotating shaft 1, and the load of the rotating shaft 1 can be kept at the bearing casings 20, 21 at both ends of the floating ring 9.
The bearing clearance (the clearance between the bearing metal 6 and the rotary shaft 1) related to the leakage of oil supply is always kept constant. Therefore, the amount of oil leaking through the bearing metal 6 can be suppressed to a preset amount, and there is an advantage that the oil supply efficiency is increased.

Although the bearing metal 23 of the bearing casings 20 and 21 supports the weight of the rotating shaft 1, as a modified example for further improving the lubrication of the bearing metal 23 portion, a circumferential oil sump is provided near the center of the bearing metal 23. It is conceivable that the oil is directly supplied to the oil sump from the outside of the bearing casings 20 and 21 by providing. In this case, the oil leaked from the oil sump toward the floating ring 9 is provided with an oil drain hole in the bearing casings 20 and 21 on the inner peripheral side of the O-ring 24, and the cover 15 is directly provided with the oil leaked from the bearing metal b. Oil can be drained by adopting a configuration that leads to.

[Effect of device]

As described above in detail, the peripheral type oil supply device of the present invention provides the following effects and advantages.

(1) A peripheral surface type oil supply mechanism that uses the outer peripheral surface of the rotating shaft to supply oil to the center hole of the rotating shaft and a (intermediate) bearing that supports the weight of the rotating shaft are formed by separate members, respectively, and Since these are connected to form an integral structure, the entire mounting space can be greatly reduced while the peripheral surface type oil supply mechanism has only the oil supply function.

As a result, manufacturing and installation costs can be significantly reduced.

(2) The floating ring forming the peripheral type oil supply mechanism is disposed so as to float in the auxiliary oil supply chamber, and the load of the rotating shaft does not act on the bearing metal. Therefore, this bearing metal always follows the fluctuation of the rotating shaft and is always kept concentric with the rotating shaft, so that the gap between the bearing metal and the rotating shaft is preset to a size that can obtain a predetermined amount of leakage oil. Therefore, it is possible to prevent the amount of oil leakage from unnecessarily increasing and improve the oil supply efficiency.

(3) Since the bearing casing also serves as a sealing member at both ends of the auxiliary oil supply chamber, it is possible to reduce the number of parts and the number of assembling steps.

(4) It is particularly effective when applied to a counter-rotating propeller ship or a variable pitch propeller ship that requires lubrication in the center hole of the rotating shaft and the drive shaft system is strict in terms of space, but other large types It is also suitable as an oil supply device such as a rolling mill.

[Brief description of drawings]

1 to 3 show a peripheral type oil supply device as an embodiment of the present invention. FIG. 1 is a side sectional view thereof, and FIG. 2 is a view taken along arrows AA and BB of FIG. Sectional view, FIG. 3 is C of FIG.
FIG. 4 is a sectional view taken along the line C, and FIGS. 4 to 7 show a conventional example. FIG. 4 is a side sectional view of the peripheral surface type oil supply device, and FIG. A sectional view, FIG. 6 is a side sectional view of a conventional intermediate bearing, and FIG. 7 is a sectional view taken along the line VII-VII in FIG. 1 …… Rotary axis, 2 …… Center hole, 3 …… Oiling hole, 4,5 ……
Casing, 6,23 ... Bearing metal, 7 ... Oil passage hole, 8 ...
… Auxiliary oil supply chamber, 9 …… Floating ring, 13 …… Oil supply chamber, 18 …… Oil supply port, 19 …… Pipes (on board), 20,21…
... Bearing casing, a ... Lubricating oil.

Claims (1)

(57) [Scope of utility model registration request] 1. A rotary shaft having a central hole for oil supply along a central axis and an oil supply hole radially diverging from the central hole, and an annular auxiliary oil supply chamber which is arranged outside the rotary shaft and is internally provided. A pair of bearing metals that are slidable relative to each other along the outer peripheral surface of the rotary shaft and are formed between the bearing metal and communicate with the oil supply hole. A floating ring having a refueling chamber is disposed in a floating manner in the annular auxiliary refueling chamber, the casing is composed of an upper casing and a lower casing, and the lower casing communicates with the annular auxiliary refueling chamber. A port is formed, an oil passage is formed in the floating ring to connect the oil supply chamber and the outside of the floating ring, and a half hole is formed at both ends of the upper casing and the lower casing. A bearing casing having an installation portion is connected to the lower end portion in the shape of a groove, bearing metal for attaching the rotary shaft to rotation is attached to the inner peripheral surface of each bearing casing, and the bearing casing is used to support the auxiliary oil supply chamber. A peripheral surface type oil supply device characterized in that both ends are closed.