JPH0716156Y2 - Oil lubricated bearing device for rotating machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an oil-lubricated bearing device for a rotating machine, and more particularly to adjustment of the amount of lubricating oil fed to the bearing.

[Conventional technology]

2 and 3 relate to an oil-lubricated bearing device for a rotary machine. In the drawings, (1) is a bearing, two of which are arranged vertically.
(2a) is an upright shaft main body, and a push (2b) into which a bearing (1) is fitted is fixed to the shaft main body (2a) at the outer peripheral portion of the shaft main body (2a). Is configured. Shaft (2) is bearing (1)
It is rotatably supported by. (3) is a bearing (1)
Cup-shaped brackets for holding
Is a lubricating oil that is stored inside the bracket (3) and lubricates the bearing (1).
In a), generally about 1/2 is always immersed in lubricating oil (4). (3a) is a housing part which is integrally fixed to the bottom part (3b) of the bracket (3) and stands from the bottom part (3b). The housing (3a) holds the bearing (1) by fitting the outer diameter portion of the bearing (1). Further, at a lower position of the housing part (3a), a plurality of screw holes (5) through which the lubricating oil (4) flows in order to circulate the lubricating oil (4) accumulated in the bracket (3) to the bearing (1). Is provided. Reference numeral (6) is an adjusting bolt for adjusting the amount of oil, and an oil circulating hole (6a) penetrating in the axial direction is provided in the central portion of the adjusting bolt (6). The adjusting bolt (6) is screwed into the screw hole (5) and attached to the housing portion (3a). Reference numeral (7) is a partition member formed in a tubular shape for preventing the lubricating oil (4) in the bracket (3) from leaking to the outside, and one end thereof is fixed to the bracket (3). Reference numeral (8) is an O-ring provided to prevent the lubricating oil (4) in the bracket (3) from seeping outside. (9) is inserted into the bush (2b) and the bearing (1)
The collar (10) is a nut for preventing the bearing (1) from falling through the collar (9), and the bush (2)
It is fastened by being screwed onto b). Reference numeral (11) is a holding plate for fixing the bearing (1), which is screwed and fixed to the housing portion (3a).

Next, the operation will be described.

In the bearing (1) that supports the shaft (2), the lubricating oil (4) accumulated in the bracket (3) is provided on the bracket (3) as indicated by the arrow in the figure by the rotation of the bearing (1). Lubrication is performed by passing through several screw holes (5) and lubricating the inside of the bearing (1) and returning to the bracket (3) again.

Lubrication of the bearing (1) is carried out in Japanese Utility Model Publication No. Sho 49-131433, No. 3
As described and disclosed on page 1, lines 1 to 7, since the lubricating oil (4) is immersed in about 1/2 of the bearing (lower part) (1a), the rotation of the bearing (1a) As a result, the lubricating oil (4) moves upward due to the centrifugal force due to the rotation and revolution of the balls that are rolling elements, and the upper bearing (1b) is lubricated.

If the degree of immersion of the lubricating oil (4) in the bearing (1) increases, the rotational resistance of the bearing (1) increases and the temperature of the bearing portion rises. On the other hand, if the amount is too small, the lubricating oil (4) will run short on the bearing (1), causing seizure.

The amount of this oil varies depending on the number of rotations of the bearing (1) and the structure of the lubricating oil path, so the actual machine test is performed and the size of the hole differs in the screw hole (5) provided in the bracket (3). The amount of oil was adjusted by replacing several adjusting bolts (6).

[Problems to be solved by the invention]

Since the conventional oil-lubricated bearing device for a rotary machine is configured as described above, the rotary machine must be disassembled at the time of adjustment and must be reassembled after the adjustment.

In addition, there is a problem that it is necessary to disassemble and reassemble several times to adjust the optimum amount of oil.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain an oil-lubricated bearing device for a rotating machine, which can adjust an optimum amount of oil from the outside of the rotating machine.

[Means for solving problems]

An oil-lubricated bearing device for a rotary machine according to the present invention includes a bearing for supporting a shaft of a vertical rotary machine, and the oil-lubricated bearing device for a rotary machine, which lubricates the bearing with lubricating oil, stores the lubricating oil therein. And a bracket that stands upright from the bottom of the bracket to fit the outer diameter portion of the bearing to hold the bearing, partition the interior of the bracket into first and second oil tanks, and An oil amount adjustment capable of adjusting the amount of lubricating oil supplied between the first and second oil tanks from the outside of the bracket by engaging with the housing portion having an opening communicating with the second oil tank. And means.

[Action]

In the oil lubrication bearing device for a rotary machine according to the present invention, the oil adjusting means mounted on the bracket is inserted into and engaged with the opening of the housing to change the area of the opening.

[Example of device]

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, (1), (2), (4), (7) to (11) are the same as those of the conventional device. (23) is a substantially cup-shaped bracket for holding the bearing (1), and a lubricating oil (4) for lubricating the bearing (1) is stored inside.

(23a) is a housing part fixed integrally to the bottom part (23b) of the bracket (23) and provided upright from the bottom part (23b). The housing part (23a) separates the oil tank from the first oil tank (28), A second oil tank (29) is formed. Further, the bracket (23) is provided at the lower position of the housing (23a).
A plurality of openings (25) through which the lubricating oil (4) flows are provided in order to circulate the lubricating oil (4) accumulated in the bearing (1). (26) is an oil adjusting bolt as an oil amount adjusting means for adjusting the lubricating oil (4) in the oil tank from the outside. The adjusting bolt (26) has a rod-shaped part (26a) with a sharp tip.
And a screw part (26b) for fixing the adjustment bolt (26) to the bracket (23) by screwing, and the adjustment bolt (2
A groove (26C) for inserting a screwdriver, which is used for screwdriver to screw 6) to the bracket (23), is provided. The thickness of the rod portion (26a) is the same as that of the bracket (2
It is configured to be inserted and engaged with the opening (25) through which the lubricating oil provided in 3) flows. (27) is an O-ring provided to prevent the lubricating oil (24) inside the rotating machine from seeping outside.

In the oil-lubricated bearing device for a rotating machine configured as described above,
The rotation of the bearing (1) that supports the shaft (2) passes through the opening (25) provided in the bracket (23) as shown by the arrow in the figure to lubricate the inside of the bearing (1) and re-install the bracket (23). Lubrication is carried out by returning to).
By rotating the oil adjusting bolt (26) attached to the bracket (23) with this amount of oil, the rod portion (26a) of the oil adjusting bolt (26) is inserted into the opening (25) provided in the bracket (23). ) Is inserted and the area of the opening (25) is varied to adjust the oil amount appropriately.

[Effect of device]

As described above, according to this invention, the oil tank in the bracket is partitioned into the first and second oil tanks by the housing portion provided upright from the bottom of the bracket, and the opening for communicating the first and second oil tanks. Since the oil amount adjusting means is engaged with and the lubricating oil supply amount between the first and second oil tanks can be adjusted from the outside of the bracket, the oil amount can be adjusted from the outside of the rotating machine. Oil amount can be adjusted without disassembling, adjusting and reassembling the rotating machine.

[Brief description of drawings]

1 is a half sectional view showing an oil lubricated bearing device for a rotary machine according to an embodiment of the present invention, FIGS. 2 and 3 are related to a conventional oil lubricated bearing device for a rotary machine, and FIG. 2 is a rotary machine. FIG. 3 is a half sectional view showing the oil lubricated bearing device of FIG. 3, and FIG. 3 is a detailed view of the head of the adjusting bolt. In the figure, (1) is a bearing, (2) is a shaft, and (4)
Is a lubricating oil, (23) is a bracket, (23a) is a housing part, (26) is an oil amount adjusting means, (28) is a first oil tank, (2)
9) is the second oil tank.

Claims (1)

[Scope of utility model registration request] 1. An oil-lubricated bearing device for a rotating machine, comprising a bearing for supporting a shaft of a vertical rotating machine, wherein the bearing is lubricated with lubricating oil, and a bracket for accommodating the lubricating oil therein and a bottom portion of the bracket. Is further erected to fit the outer diameter portion of the bearing to hold the bearing, partition the inside of the bracket into first and second oil tanks, and
A housing part having an opening communicating with the second oil tank, and an oil amount that engages with the opening to adjust the lubricating oil supply amount between the first and second oil tanks from the outside of the bracket. An oil-lubricated bearing device for a rotating machine, comprising: adjusting means.