JP4130557B2 - Bearing lubrication scraping device for underwater rotating machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bearing lubrication grease lifting device in a rotating machine used underwater such as an underwater electric pump and an aeration / stirring device.
[0002]
[Prior art and its problems]
In rotating machines used underwater, such as submersible electric pumps and aeration / stirring devices, grease is used as a lubricant for bearings, and shielded bearings in which lubricating grease is enclosed in the bearings are also commercially available. However, the amount of grease enclosed is small, and when used, the viscosity of the grease decreases due to the influence of ambient heat, etc., resulting in a fluid state, and the sealing effect of the bearing shield is significantly reduced. The lubricating action will be lost. Therefore, conventionally, as shown in FIG. 5, a system has been adopted in which grease is replenished in a timely manner from the grease nipple 111 using an open type bearing 102. Since it is not desirable to discharge the grease flowing out due to the influence of the heat described above into the water due to environmental problems, a grease reservoir chamber 106 having a certain capacity of storage capacity is provided directly below the open type bearing 102 inside the device. However, not only a manufacturing problem that requires space securing and structural addition for that purpose, but also the grease dropped and accumulated in the grease reservoir chamber 106 must be periodically recovered and removed. In order to remove the accumulated grease, it is necessary to disassemble the equipment by lifting the device to the ground and removing the motor frame 112, the bearing bracket 103, and the like.
[0003]
As another known example, as disclosed in JP-A-8-303472, as a means for preventing the fall of grease, it is proposed to fix a fixing ring formed with a recess that becomes a grease reservoir on the upper surface directly below the bearing. . However, this fixing ring needs to have a watertight structure on the sliding contact surface with the rotating side, which makes the structure complicated and requires high precision assembly and high viscosity of grease. In this state, it is inevitable that the viscosity of the grease decreases due to the heat generated by the motor, the surrounding liquid temperature, or the sliding heat generated by the bearing itself. The collected grease must be collected and removed regularly. In order to collect and remove the grease, as in the case shown in FIG. 5, it is necessary to disassemble the equipment by lifting the equipment to the ground and removing the motor frame, the bearing bracket, and the like.
[0004]
OBJECT OF THE INVENTION
The object of the present invention is to automatically return the lubricating grease filled in a bearing such as a submersible pump to the bearing side due to the influence of heat during operation, etc. Lubricating grease can be utilized, and it is possible to manufacture long-life and stable bearing characteristics, which is simple in structure, can be manufactured at low cost, and has excellent maintainability. It is to provide.
[0005]
[Structure of the invention]
In掻揚device bearing lubrication grease in water rotary machine according to the present invention, by fitted a plurality of rotor between the facing surfaces of the bearing outer ring for fitting engagement in the bearing inner ring and the bearing bracket for fitting engagement to the rotation shaft gap the lower surface of the bearing filled with lubricating grease in part, to retain the space portion of the annular upper surface of the bearing bracket bottom plate of penetrations of the rotating shaft, a circular operation plate which rotates the rotational shaft integrally shaped in the space portion the operation panel outer circumference directly under the bearing is stretched to close at a gap on the space inner circumferential wall, and, together with the Toruro to open from the lower surface of the actuating plate to the upper surface providing a plurality in the entire circumferential direction, rotation A plurality of guide pieces having an inclined surface having an upward slope toward the direction are attached to the above-mentioned through-passage in the entire circumferential direction .
[0006]
[Action]
When the submersible rotating machine is driven, the operation panel also rotates with the rotation of the rotating shaft, and the lubricating grease filled in the bearing is softened by the influence of the surrounding heat and flows downward, and is directly under the bearing. With a plurality of open passages in the circumferential direction from the lower surface to the upper surface of the operating panel rotating together with the rotating shaft while being received on the upper surface of the operating panel that is stretched in a circular shape and preventing downward flow, A plurality of guide pieces attached to the above-mentioned through-passages are returned in an upward direction on the inclined surface having an upward slope toward the rotation direction, and are returned upward.
[0007]
【Example】
The embodiment will be described below with reference to the embodiment shown in FIGS.
[0008]
1 rotary shaft in water rotary machine, 2 denotes a bearing for supporting the rotary shaft 1, a plurality between the facing surfaces of the bearing outer ring 2o for fitting the bearing inner ring 2i and the bearing bracket 3 to fitting engagement to the rotation shaft 1 the trochanter 4 · 4 to transmural instrumentation lubricating grease in the gap portion 5 is filled. Reference numeral 3u denotes a bearing bracket bottom plate through which the rotary shaft 1 is fitted, and an oil seal 13 for preventing leakage of grease is attached to the fitting portion of the rotary shaft 1. 6 is a space held between the upper surface of the bearing bracket bottom plate 3 u and the lower surface of the bearing 1, and 7 is a circular operation fitted to the rotary shaft 1 so as to be positioned immediately below the bearing 2 in the space 6. a board, the operation panel outer 7 peripheral is stretched so as to rotate fixedly to the rotary shaft 1 and integrally shaped by an adjusting washer 8 and tightening the nut 9 to close at a gap on the space inner circumferential wall, and, while arranging a plurality Toruro 7h · · 7h to open from the lower surface of the operation panel 7 to the upper surface in the entire circumferential direction, a guide strip 7t · · 7t having an inclined surface of the upward gradient towards the direction of rotation all A plurality of through passages 7h, 7h are attached in the circumferential direction . Reference numeral 10 denotes a presser cover covered from above the bearing 2, 11 a grease nipple for supplying lubricating grease to the bearing 2, and 12 a motor frame mounted on the bearing bracket 3.
[0009]
When the submersible rotating machine such as the submersible electric pump or the aeration / stirring device is driven, the operation panel 7 is rotated with the rotation of the rotating shaft 1. The lubricating grease filled in the bearing 2 is softened by the influence of the surrounding heat and is received by the upper surface of the operating panel 7 that is circularly stretched directly below the bearing 2 while it is about to flow downward. Along with a plurality of through passages 7h... 7h opened in the entire circumferential direction from the lower surface to the upper surface of the operating panel 7 rotating together with the rotary shaft 1 while preventing downward flow, the slope of the upward gradient in the rotational direction is refunded upward by pumped action of multiple said Toruro 7h · · 7h to attached to the guide strip 7t · · 7t in the entire circumferential direction to the surface. Therefore, the lubricating grease is effectively used for a long time without waste and maintains stable bearing characteristics. The lubricating grease is filled from the upper surface of the bearing 2 through the grease nipple 11, but unlike the conventional case where the lubricating grease continues to flow out during the operation of the submersible rotary machine, the lubricating grease returned upward is reused. In the case of the device of the present invention, it is not necessary to replenish grease for a long period of time.
[0010]
【The invention's effect】
According to the present invention, even if the lubricating grease filled in a bearing such as a submersible pump is softened due to the influence of heat during operation or the like, it is automatically returned to the bearing while being received so as not to flow down. Lubricating grease can be used effectively for a long period of time without waste, maintains long-life and stable bearing characteristics, is simple in structure, can be manufactured at low cost, and has excellent maintainability. A grease scraping device can be constructed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional side view of a main part of a submersible electric pump to which a device of the present invention is applied.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a plan view of an operation panel in the device of the present invention.
4 is a cross-sectional side view taken along the line AA in FIG. 3. FIG.
FIG. 5 is a longitudinal sectional side view of a main part of a conventional submersible electric pump not provided with the device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Bearing 2i Bearing inner ring 2o Bearing outer ring 3 Bearing bracket 3u Bottom plate 4 of bearing bracket 5 Trochanter 5 Cavity 6 Annular space 7 Actuation panel 7h Passage path 7t Guide piece

Claims (1)

The lower surface of the to fit a plurality of rotor between the facing surfaces of the bearing outer ring for fitting engagement in the bearing inner ring and the bearing bracket for fitting engagement to the rotation shaft filled with lubricating grease in the gap portion bearing, transmural axis of rotation An annular space is held on the upper surface of the bottom plate of the bearing bracket that passes therethrough, and a circular operating panel that rotates integrally with the rotary shaft in the space is placed directly under the bearing with a clearance between the outer peripheral edge of the operating panel and the inner peripheral wall of the space. It is stretched to close spaced, and, the Toruro to open from the lower surface of the actuating plate to the upper surface provided with a plurality in the entire circumferential direction, the entire circumferential direction of the guide strip having an inclined surface of the upward gradient towards the direction of rotation A plurality of the above-mentioned through passages are attached to the bearing lubrication grease scraping device in the underwater rotary machine.

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