CN115681337A

CN115681337A - Active lubrication roller bearing device actuated by piezoelectric drive

Info

Publication number: CN115681337A
Application number: CN202211344244.2A
Authority: CN
Inventors: 王卓; 李锴; 陈硕; 陈维山; 刘军考
Original assignee: Harbin Haoxing Technology Co ltd
Current assignee: Harbin Haoxing Technology Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-02-03

Abstract

The invention discloses a piezoelectric-driven actuated active lubrication roller bearing device, which comprises a bearing inner ring, a bearing outer ring, a rolling body and a piezoelectric vibrator, wherein the bearing outer ring is sleeved on the outer side of the bearing inner ring, an inner ring thread fixing hole is formed in the bearing inner ring, an outer ring thread fixing hole is formed in the bearing outer ring, a roller path is arranged in the middle between the bearing inner ring and the bearing outer ring, the cross section of the roller path is quadrilateral, the rolling body is arranged in the roller path, a micro-spraying cavity is arranged on the upper side of the roller path of the bearing outer ring, the piezoelectric vibrator is horizontally arranged in the middle of the micro-spraying cavity, a through hole and an oil injection hole are formed in the upper side of the micro-spraying cavity, an oil guide channel is arranged on one side of the bottom of the micro-spraying cavity, and the oil guide channel is communicated with one side of the upper side of the roller path. According to the active lubrication roller bearing device actuated by piezoelectric driving, the active oil supply device is designed to be embedded, and the lubrication device is embedded in the bearing structure, so that the structure is compact, and the occupied space is small.

Description

Active lubrication roller bearing device actuated by piezoelectric drive

Technical Field

The invention relates to the technical field of bearings, in particular to an active lubrication roller bearing device actuated by piezoelectric drive.

Background

The bearing is lubricated mainly by external manual oil supply lubrication, passive oil supply lubrication, active oil supply lubrication and the like. However, the external manual oil supply lubrication needs to be assembled and disassembled during operation, and because the oil supply is difficult to be timely and accurate due to manual reasons, the efficiency is low, and the operation is inconvenient. The passive oil supply lubricating device has a simple structure and mature technology, but the defects of untimely lubrication, poor controllability and the like are difficult to avoid. The active oil supply lubricating device improves the defects of manual oil supply lubrication and passive oil supply lubrication to a certain extent, and improves the precision, speed and controllability of oil supply, but the active oil supply lubricating device in the prior art is mostly designed to be an external type separated from a bearing structure, and has the defects of large occupied space and insufficient structural compactness.

Disclosure of Invention

The invention aims to provide a piezoelectric driving actuated active lubrication roller bearing device, wherein an active oil supply device is designed to be embedded, and a lubrication device is embedded in a bearing structure, so that the structure is compact and the occupied space is small.

In order to achieve the purpose, the invention provides a piezoelectric-driven-actuated active lubrication roller bearing device which comprises a bearing inner ring, a bearing outer ring, a rolling body and a piezoelectric vibrator, wherein the bearing outer ring is sleeved on the outer side of the bearing inner ring, an inner ring thread fixing hole is formed in the bearing inner ring, an outer ring thread fixing hole is formed in the bearing outer ring, a roller path is arranged in the middle between the bearing inner ring and the bearing outer ring, the cross section of the roller path is quadrilateral, the rolling body is arranged in the roller path, a micro-spraying cavity is arranged on the upper side of the roller path of the bearing outer ring, the piezoelectric vibrator is horizontally arranged in the middle of the micro-spraying cavity, a through hole and an oil filling hole are formed in the upper side of the micro-spraying cavity, an oil guide channel is arranged on one side of the bottom of the micro-spraying cavity, and the oil guide channel is communicated with one side of the upper side of the roller path.

Preferably, the piezoelectric vibrator comprises a piezoelectric ceramic piece and a metal sheet, the metal sheet is horizontally arranged in the micro-spray cavity, and the piezoelectric ceramic piece is fixedly connected to the upper side of the metal sheet.

Preferably, the piezoelectric ceramic plate, the metal plate and the micro-spraying cavity are all of an annular structure or a fan-shaped structure.

More preferably, the piezoelectric ceramic plate and the metal plate are surrounded by a plurality of sectorial sectors.

Preferably, an electric wire connected to the piezoelectric vibrator electrode is provided in the through hole.

Preferably, the oil guide channel is conical or cylindrical.

Therefore, compared with other active lubricating devices, the active lubricating roller bearing device actuated by piezoelectric driving has the advantages that the oil supply device is designed to be embedded, the lubricating device is embedded in the bearing structure, the structure is compact, the occupied space is small, the device does not need to be assembled and disassembled during lubrication, the active lubricating bearing device actuated by piezoelectric driving drives the piezoelectric vibrator to vibrate, the purpose of spraying liquid drops to a bearing rolling body from a micro-spray cavity is achieved, the active lubricating function of the bearing is realized, the oil supply is timely, the efficiency is high, and the operation is convenient and simple.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic view of an embodiment of a piezo-electrically actuated actively lubricated roller bearing assembly of the present invention;

FIG. 2 is an enlarged view of a portion of a piezoelectric actuated actively lubricated roller bearing assembly of the present invention after installation of the bearing and shaft bore;

FIG. 3 is a schematic diagram of a micro-spray chamber of a piezo-electrically actuated actively lubricated roller bearing device of the present invention;

fig. 4 is a schematic diagram of the operating principle of a piezoelectric vibrator of a piezoelectric-driven-actuated actively-lubricated roller bearing device according to the present invention.

Reference numerals are as follows:

1. a bearing inner race; 2. a bearing outer race; 3. a rolling body; 4. a piezoelectric vibrator; 401. a piezoelectric ceramic plate; 402. a metal sheet; 5. an inner ring thread fixing hole; 6. an outer ring thread fixing hole; 7. a raceway; 8. a micro-spraying cavity; 9. an oil guide channel; 10. a through hole; 11. an oil filler hole; 12. an external drive circuit; 13. an oil storage device.

Detailed Description

The technical scheme of the invention is further explained by the attached drawings and the embodiment.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Examples

Referring to fig. 1 to 4, as shown in the drawings, the present invention provides a piezoelectric-driven active lubrication roller bearing device, which includes a bearing inner ring 1, a bearing outer ring 2, a rolling element 3, and a piezoelectric vibrator 4, wherein the bearing outer ring 2 is sleeved outside the bearing inner ring 1, the bearing inner ring 1 is provided with an inner ring thread fixing hole 5, the bearing outer ring 2 is provided with an outer ring thread fixing hole 6, and the bearing inner ring 1 is detachably linked with a shaft and an inner ring pressing plate through the inner ring thread fixing hole 5 to fix the bearing inner ring 1. The bearing outer ring 2 is detachably connected with the bearing seat through the outer ring thread fixing hole 6, and the fixation of the bearing outer ring 2 is guaranteed.

A raceway 7 is arranged in the middle between the bearing inner ring 1 and the bearing outer ring 2, the cross section of the raceway 7 is quadrilateral, the rolling body 3 is arranged in the raceway 7, a micro-spray cavity 8 is arranged on the upper side of the raceway 7 of the bearing outer ring 2, and the micro-spray cavity 8 is filled with lubricating oil. The piezoelectric vibrator 4 is horizontally arranged in the micro-spraying cavity 8, the piezoelectric vibrator 4 comprises a piezoelectric ceramic piece 401 and a metal sheet 402, the metal sheet 402 is horizontally arranged in the micro-spraying cavity 8, the piezoelectric ceramic piece 401 is fixedly connected to the upper side of the metal sheet 402, and the piezoelectric ceramic piece 401 is fixedly connected with the metal sheet 402 through a bonding agent. The piezoelectric ceramic piece 401, the metal sheet 402 and the micro-spray cavity 8 are all of an annular structure or a fan-shaped structure, and the piezoelectric ceramic piece 401 and the metal sheet 402 can also be formed by surrounding a plurality of fans and are arranged in the micro-spray cavity 8. After being electrified, the piezoelectric ceramic plate 401 generates bending vibration under the periodic excitation of an external circuit, forms pulsating sound pressure in the micro-spray cavity 8, and extrudes lubricating oil in the micro-spray cavity 8.

One side of the bottom of the micro-spraying cavity 8 is provided with a plurality of oil guide channels 9, the oil guide channels 9 are communicated with one side of the upper side of the roller path 7, the oil guide channels 9 are conical or cylindrical, and extruded lubricating oil is sprayed onto the rolling elements 3 in the roller path 7 through the oil guide channels 9, so that the self-lubricating function of the bearing is realized. The oil-guiding channel 9 can be provided either on the raceway 7 or in the bearing-side region close to the raceway 7.

Spout the upside of cavity 8 a little and be provided with logical line hole 10, lead to being provided with the electric wire with 4 electrode connection of piezoelectric vibrator in the line hole 10, electric wire and outside drive circuit 12 UNICOM, drive circuit can controlled voltage amplitude and pulse frequency, both steerable lubricating oil's spraying performance to control the liquid droplet size and the speed of spraying lubricating oil.

Spout the upside of cavity 8 a little and still be provided with oil filler point 11, oil filler point 11 is provided with a plurality ofly, and a plurality of oil filler points 11 are direct to be connected with external oil storage device 13, come to spout the cavity 8 fuel feeding a little, install epaxially. After the lubricating oil in the micro-spraying cavity 8 is sprayed and reduced through the oil guide channel 9, the lubricating oil in the oil storage device 13 immediately enters the micro-spraying cavity 8 through the oil injection hole 11 for supplement, and the condition that the lubricating oil in the micro-spraying cavity 8 is used up is avoided.

The specific work engineering is as follows: when the bearing needs to be lubricated, the driving circuit is started, the driving circuit controls the voltage amplitude and the pulse frequency, so that the piezoelectric ceramic piece is driven to vibrate, the metal sheet is driven to vibrate by the piezoelectric ceramic piece, the metal sheet vibrates in the micro-spraying cavity, lubricating oil in the micro-spraying cavity is extruded, the extruded lubricating oil is sprayed onto a rolling body in the roller path through the oil guide channel, and the self-lubricating function of the bearing is achieved.

Therefore, the piezoelectric driving actuated active lubrication roller bearing device adopting the structure has the advantages that the integral oil supply device and the bearing structure are arranged into an integral structure, the oil supply device is arranged in the bearing structure, the structure is compact, the occupied space is small, the device does not need to be assembled and disassembled during lubrication, the oil supply is timely, the efficiency is high, and the operation is convenient and simple.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the disclosed embodiments without departing from the spirit and scope of the present invention.

Claims

1. A piezoelectrically actuated actively lubricated roller bearing device, characterized by: including bearing inner race, rolling element and piezoelectric vibrator, the bearing inner race cover is established the outside of bearing inner race, be provided with inner circle thread fastening hole on the bearing inner race, be provided with outer lane thread fastening hole on the bearing outer race, the bearing inner race with middle part between the bearing inner race is provided with the raceway, the cross section of raceway is the quadrangle, the rolling element sets up in the raceway, the bearing inner race is located the upside of raceway is provided with spouts the cavity a little, piezoelectric vibrator level sets up spout the middle part of cavity a little, the upside of spouting the cavity a little is provided with through-wire hole and oil filler point, spout bottom one side of cavity a little and be provided with leads oil channel, lead oil channel with the upside of raceway communicates with each other on one side.

2. A piezo-electrically actuated actively lubricated roller bearing device according to claim 1, wherein: the piezoelectric vibrator comprises a piezoelectric ceramic piece and a metal sheet, the metal sheet is horizontally arranged in the micro-spraying cavity, and the piezoelectric ceramic piece is fixedly connected to the upper side of the metal sheet.

3. A piezo-electrically actuated actively lubricated roller bearing device according to claim 2, wherein: the piezoelectric ceramic piece, the metal sheet and the micro-spraying cavity are all of an annular structure or a fan-shaped structure.

4. A piezo-electrically actuated actively lubricated roller bearing device according to claim 1 wherein: and the wire hole is internally provided with an electric wire connected with the piezoelectric vibrator electrode.

5. A piezo-electrically actuated actively lubricated roller bearing device according to claim 1, wherein: the oil guide channel is conical or cylindrical.