JPH0228272Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a circumferential oil supply device, and in particular, the invention is designed to supply lubricating oil or hydraulic oil from the outer periphery of a rotating shaft having a hollow structure to the hollow part thereof. This invention relates to a circumferential oil supply device.

[Prior art]

In general, as devices for supplying oil to the hollow portion of a rotating shaft having a hollow structure, there are a rotary type shaft end type oiling device having a mechanical seal mechanism and a peripheral surface type oiling device using a mechanical seal type.

[Problem that the invention attempts to solve]

However, the former has a complex structure and
It can only be applied to rotating shafts with exposed shaft end faces, and the latter requires an extremely complex structure to be able to sufficiently follow vibrations or displacements in the axial and radial directions of the rotating shaft. It had problems such as getting tired.

This invention solves the problems of the conventional ones as mentioned above, has a simple structure, can be applied to rotating shafts where the shaft end face is not exposed, and has sufficient resistance against vibration and displacement of the rotating shaft. It is an object of the present invention to provide a circumferential type oil supply device that can reliably supply oil according to the following conditions.

[Means for solving problems]

This idea aims to achieve the above objectives.
A case member having an annular recess on the inner peripheral surface is disposed on the outer periphery of a rotating shaft having a hollow structure, and a floating ring member having a sliding material on the inner peripheral surface on the outer periphery of the rotating shaft in the annular recess. is disposed so as to be unrotatable integrally with the rotating shaft and movable in the radial direction, with its outer peripheral surface being spaced apart from the bottom surface of the annular recess, and disposed on both end surfaces of the float ring member. The inside of the annular recess is sealed by a seal ring member, and an oil supply chamber is formed in the float ring member to communicate with the inside of the annular recess and supply oil to the hollow portion of the rotating shaft.

[Effect]

By adopting the above-mentioned means, the floating ring member allows vibration or displacement in the axial direction of the rotating shaft, and the case member allows vibration or displacement in the radial direction of the rotating shaft within the annular recess. The vibration or displacement of the floating ring member is allowed, and as a result, the vibration or displacement of the rotating shaft in the axial direction and the radial direction can be sufficiently followed.

〔Example〕

Embodiments of this invention shown in the drawings will be described below.

FIG. 1 and FIG. 2 show an embodiment of the circumferential type oil supply device according to this invention, and this circumferential type oil supply device has a rotating shaft 1 having a hollow structure, that is, a rotary shaft 1 having a hollow structure in the axial direction. The case member 3 is disposed around the outer periphery of a rotating shaft 1 in which a hollow portion 2 is formed along.

The case member 3 includes an upper casing 5 and a lower casing 6 that are fixed together with bolts 4,
It is comprised of retainers 8, 8 which are integrally fixed to both ends of the upper casing 5 and lower casing 6 with bolts 7, and is adapted to be fixed with bolts 9 to an appropriate mounting base (not shown).

The case member 3 is formed with an oil supply hole 11 to which a pipe 10 extending from an oil pump or an oil tank (not shown) is connected, and the upper casing 5, the lower casing 6, and retainers 8, 8 are formed on the inner peripheral surface. An annular recess 12 is formed surrounded by.

Inside this annular recess 12, a sliding material 13 made of a material with excellent lubricity such as white metal, resin, or carbon is pasted on the inner peripheral surface, and
A float ring member 14 is disposed between the sliding member 13 and the rotating shaft 1, and is fitted into the rotating shaft 1 with a small annular gap. The halves are fixed together to form an annular configuration.

The float ring member 14 is connected to the retainers 8, 8
It is held so as not to rotate by a dowel pin 16 attached to the retainer 8, and both end faces are sealed by an O-ring 17 attached to the retainers 8, 8, thereby sealing the inside of the annular recess 12. An annular preliminary oil supply chamber 18 is formed between the casings 5 and 6 and the float ring member 14,
When the rotating shaft 1 vibrates or displaces in the radial direction, the float ring member 14 can freely vibrate or displace in the radial direction together with the rotating shaft 1 within the annular recess 12.

Further, the float ring member 14 has an annular recessed groove-shaped oil supply chamber 19 formed on its inner circumferential surface approximately in the center between both ends, and a plurality of communication channels that communicate the oil supply chamber 19 with the preliminary oil supply chamber 18. Since the hole 20 is bored and the width of the oil supply chamber 19 in the axial direction is larger than the diameter of the oil hole 21 formed in the rotating shaft 1, the rotating shaft 1 does not vibrate or displace in the axial direction. In this case, the oil that enters the minute gap between the sliding member 13 of the float ring member 14 and the rotating shaft 1 from the oil supply chamber 19 becomes a lubricating oil, causing the rotating shaft 1 to freely vibrate or move in the axial direction. Moreover, the oil supply chamber 19 is always in communication with the oil hole 21 regardless of vibration or displacement of the rotary shaft 1 in the axial direction.

Further, a buttful plate 22, a cover 23, and an oil drain 24 are fixed to the outer ends of the retainers 8, 8 with bolts 25, respectively, so that the sliding member 13 of the float ring member 14 and the rotating shaft 1 are connected to each other. The oil leaking from the minute gap is removed by the Batsuful Plate 22.
The oil collected in the oil sump 26 and recovered from the recovery hole 27 by the oil sump 26 is collected from the recovery hole 27 formed in the cover 23. After being collected through the bureau, it is put back into use.

Next, the operation of the above will be explained.

First, oil sent through the pipe 10 from an oil pump or an oil tank (not shown) is sent to the oil supply hole 11.
is introduced into the preliminary oil supply chamber 18, and then through the communication hole 2.
0 into the oil supply chamber 19, and this oil supply chamber 1
The oil is supplied to the hollow portion 2 of the rotary shaft 1 from the oil hole 21 from the oil hole 21 .

If the rotary shaft 1 vibrates or is displaced in the axial direction during operation, the oil that has entered the minute gap between the sliding member 13 of the float ring member 14 and the rotary shaft 1 from the oil supply chamber 19 is lubricating oil. As a result, the rotating shaft 1 can be freely vibrated or displaced in the axial direction, and the width of the oil supply chamber 19 in the axial direction is larger than the diameter of the oil hole 21 formed in the rotating shaft 1. Regardless of vibration or displacement in the axial direction of the rotating shaft 1, the oil supply chamber 19 always communicates with the oil hole 21 and continues to supply oil to the hollow portion 2 of the rotating shaft 1.

Additionally, if the rotating shaft 1 vibrates or is displaced in the radial direction during operation, the floating ring member 14
is freely vibrated or displaced in the radial direction together with the rotating shaft 1 within the annular recess 12.

Therefore, even if the rotary shaft 1 vibrates or is displaced in the axial and radial directions during operation, the circumferential oil supply device sufficiently follows the vibration and reliably supplies oil to the hollow portion 2. I will continue.

In the above embodiment, the casing is divided into two upper and lower parts, an upper casing 5 and a lower casing 6, and the float ring member 14
Although the configuration is shown in which the structure is divided into upper and lower parts, the structure is not limited to this, and, for example, the structure may be constructed in one piece, and the pressure of the oil supplied to the oil supply hole 11 through the pipe 10 is high. In some cases, the amount of oil leakage increases in proportion to the pressure.
Sliding material 13 of float ring member 14 and rotating shaft 1
The amount of oil leakage can be reduced by further narrowing the minute gap between the two or widening the width of the sliding member 13, and the pressure of the oil supplied to the oil supply hole 11 is low. Of course, in such a case, the width of the sliding member 13 may be made narrower.

[Effect of idea]

As described above, this device includes a case member having an annular recess on the inner peripheral surface around the outer periphery of the rotating shaft having a hollow structure, and the outer peripheral surface of the case member having an annular recess on the inner peripheral surface of the rotating shaft within the annular recess. unable to rotate integrally with the rotating shaft while being separated from the bottom surface of the annular recess;
and sealing the inside of the annular recess with seal ring members disposed so as to be displaceable in the radial direction and disposed on both end surfaces of the float ring member; By forming a refueling chamber that communicates with the interior and supplies oil to the hollow part of the rotating shaft, the structure is simple and can be applied to rotating shafts where the shaft end surface is not exposed. It follows axial and radial vibrations or displacements well and reliably supplies oil to the hollow part of the rotating shaft, so that it can be used, for example, on the inner or outer shaft of a counter-rotating propeller system for ships. Suitable for supplying (discharging) lubricating oil to variable pitch propeller devices, supplying (discharging) hydraulic oil to variable pitch propeller devices, etc., and has excellent effects such as being suitable for supplying oil to various large rolling mills, etc. for land use. It has the following.

[Brief explanation of the drawing]

The drawings show an embodiment of the circumferential oil supply device according to this invention, in which Fig. 1 is a longitudinal sectional view, the left half of Fig. 2 is taken along line A-A in Fig. 1, and the right half is taken along the line A-A of Fig. 1. FIG. 3 is a cross-sectional view taken along line B-B. 1... Rotating shaft, 2... Hollow part, 3... Case member, 4, 7, 9, 15, 25... Bolt, 5...
Upper casing, 6...Lower casing, 8...
Retainer, 10... Piping, 11... Oil supply hole, 12
... Annular recess, 13 ... Sliding material, 14 ... Float ring member, 16 ... Knock pin, 17 ... O
Ring, 18... Reserve oil supply chamber, 19... Oil supply chamber,
20...Communication hole, 21...Oil hole, 22...Bassful plate, 23...Cover, 24...Oil drainer,
26... Oil sump, 27, 28... Collection hole.

Claims (1)

[Scope of utility model registration request] A case member having an annular recess on the inner peripheral surface is disposed on the outer periphery of a rotating shaft having a hollow structure, and a floating ring member having a sliding material on the inner peripheral surface on the outer periphery of the rotating shaft in the annular recess. is disposed so as to be unrotatable integrally with the rotating shaft and movable in the radial direction, with its outer peripheral surface being spaced apart from the bottom surface of the annular recess, and disposed on both end surfaces of the float ring member. The inside of the annular recess is sealed by a seal ring member, and a refueling chamber is formed in the float ring member to communicate with the inside of the annular recess and supply oil to the hollow part of the rotating shaft. Peripheral oil supply device.