CN113029564B - Hot-rolled strip steel roller way bearing state diagnosis device and method - Google Patents

Abstract

The invention relates to a device and a method for diagnosing the state of a hot-rolled strip steel roller way bearing, belonging to the field of metallurgical equipment detection. In the diagnosis device, a rubber tube is inserted in a heat conduction shell in the middle, a closed cavity is formed between the outer side surface of the rubber tube and the inner wall surface of the heat conduction shell in a matching way, and paraffin is filled in the closed cavity; the transparent cover is buckled at the top of the rubber pipe and buckled with the heat conduction shell, inserting holes for inserting the push rod are correspondingly formed in the transparent cover and the rubber pipe, and the push rod penetrates through the transparent cover and extends into the rubber pipe. This scheme utilization paraffin has very big coefficient of expansion near its melting point temperature to paraffin is as expanded material, and through gathering the bearing and generating heat or the abnormal operating temperature that external environment caused at end of becoming invalid, the drive push rod in time discovers the problem through visualing before the trouble takes place, can in time arrange the overhaul of equipments by make full use of sporadic downtime, greatly reduced the dead trouble of roll table card that the bearing became invalid and caused.

Description

Hot-rolled strip steel roller bearing state diagnosis device and diagnosis method

Technical Field

The invention belongs to the field of metallurgical equipment detection, and particularly relates to a device and a method for diagnosing the condition of a roller bearing of hot-rolled strip steel.

Background

A large number of rolling bearings can be used in transportation equipment in the steel production process, the bearings of special equipment are mostly monitored in the mode of installing vibration sensors, but the problems of complex circuits and high cost caused by the fact that vibration sensors are all installed due to the fact that roller bearings are large in number and wide in distribution are not practical. Therefore, the bearing state is not monitored at present, and the roller bearing is usually blocked after failure, and is temporarily stopped for processing after the motor current is increased and gives an alarm.

Through research and analysis on the failure process of the rolling bearing, the following results are found: the temperature near the bearing is a key and comprehensive index, no matter the temperature is due to cooling water, lubrication or friction heating caused by bearing failure, when the temperature near the bearing is high, the roller bearing can be failed and blocked, and the normal production rhythm is greatly influenced.

Disclosure of Invention

In view of the above, the present invention provides a device and a method for diagnosing a condition of a roller bearing of a hot-rolled strip steel, which can find an abnormal condition of the roller bearing in time and avoid an influence on production.

In order to achieve the purpose, the invention provides the following technical scheme:

a hot-rolled strip steel roller way bearing state diagnostic device comprises a heat-conducting shell, a rubber tube, a transparent cover and a push rod; the rubber tube is inserted in the heat conduction shell in the middle, the outer side surface of the rubber tube is matched with the inner wall surface of the heat conduction shell to form a closed cavity, and paraffin is filled in the closed cavity; the transparent cover is buckled at the top of the rubber tube and buckled with the heat conducting shell, inserting holes for inserting the push rod are correspondingly formed in the transparent cover and the rubber tube, and the push rod penetrates through the transparent cover and extends into the rubber tube.

Further, the device also comprises an indicating rod and a mounting shell; the heat conduction casing sets firmly on the installation shell, is equipped with the pilot lever through the swivel nut on the installation shell, and this pilot lever corresponds the top department that sets up at the push rod, and this pilot lever can stretch out the swivel nut under the promotion of push rod.

And the device further comprises a reset mechanism which is a tension spring, the top of the push rod is provided with a connecting sleeve A, one end of the tension spring is hooked on the connecting sleeve A, and the other end of the tension spring is correspondingly hooked on the mounting shell.

Further, the device also comprises a resetting mechanism, wherein the resetting mechanism comprises a connecting sleeve A, a connecting sleeve B, a spring and a connecting sleeve C; the connecting sleeve A is arranged at the top of the push rod, the connecting sleeve B is arranged below the connecting sleeve A, the connecting sleeve C and the connecting sleeve B are oppositely arranged, the lower end of the connecting sleeve C is fixedly arranged on the mounting shell, the connecting sleeve C and the connecting sleeve B are matched to form a cavity, and the spring is arranged in the cavity.

Furthermore, the installation shell mainly comprises a base plate and a gland, wherein the base plate is arranged on the outer side of the connecting sleeve C and is buckled with the connecting sleeve C, and the gland is covered on the base plate and is connected with the base plate through a connecting piece; the heat conduction shell is fixedly arranged on the seam allowance positioned on the inner side of the connecting sleeve C.

Furthermore, the extrusion end of the push rod is of a conical structure.

Further, the heat conduction shell is of a tubular structure with one closed end.

Furthermore, a color ring and scales are arranged on the indicating rod.

The diagnosis method based on the hot-rolled strip steel roller way bearing state diagnosis device specifically comprises the following steps:

s1, mounting a diagnosis device on the side surface of a bearing seat, wherein during mounting, a heat conduction shell and paraffin and a rubber tube in the heat conduction shell are close to a bearing area and used for monitoring the temperature of an outer ring of the bearing seat;

s2, when the temperature of a bearing working area exceeds the working temperature of the bearing in an abnormal condition, heat is transferred to paraffin through the heat conduction shell, the paraffin expands when heated to extrude the rubber tube, the rubber tube pushes the push rod out of the heat conduction shell for a certain distance, and the extended push rod pushes the indicating rod;

s3, cooling the bearing seat to room temperature after stopping, restoring the push rod to the original position under the action of the spring, and stopping the indicating rod at the fault indicating position;

and S4, manually pressing the indicating rod back to a normal state after the fault is eliminated, and monitoring the bearing again.

Further, the diagnosis device is horizontally installed, and the central axes of the push rod and the indicating rod are positioned on the horizontal central plane of the bearing.

The working principle is as follows: this scheme utilization paraffin has very big expansion coefficient near its melting point temperature to paraffin is as the expanding material through gathering the bearing and generating heat or the abnormal operating temperature that external environment caused at the end of becoming invalid, and drive front end indicator is through the timely discovery problem of visualing before the trouble takes place, can make full use of sporadic downtime in time arrange the overhaul of the equipments, greatly reduced the dead trouble of roll table card that the bearing became invalid and caused.

The invention has the beneficial effects that:

the temperature near the bearing outer ring is collected by the aid of the characteristic that the thermal expansion coefficient of paraffin is large, when the temperature of the bearing outer ring is higher than the safe working temperature, a signal can be given by means of structural deformation, equipment inspection personnel can find the abnormal state in time conveniently, and further sporadic shutdown time is utilized for timely processing.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of the construction of a diagnostic device;

FIG. 2 is a schematic structural diagram of a diagnostic device in a fault state of a roller bearing;

FIG. 3 is a schematic structural diagram of the diagnosis device after the roller bearing is cooled in a fault state;

FIG. 4 is a schematic structural view of a temperature detecting and resetting mechanism;

fig. 5 is a schematic view of the mounting of the diagnostic device on the bearing housing.

Reference numerals:

the device comprises a heat-conducting shell-1, a rubber tube-2, a transparent cover-3, a push rod-4, paraffin-5, an indication rod-6, an installation shell-7, a threaded sleeve-8, a connecting sleeve A-9, a connecting sleeve B-10, a spring-11, a connecting sleeve C-12, a bearing seat-13 and a bearing-14; a base plate-701 and a gland-702; spigot-1201.

Detailed Description

The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and the specific meaning of the terms described above will be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1 to 4, a hot-rolled strip steel roller bearing state diagnostic device is shown, which includes a heat-conducting casing 1, a rubber tube 2, a transparent cover 3 and a push rod 4; the rubber tube 2 is inserted in the heat conduction shell 1 in the middle, and a closed cavity is formed between the outer side surface of the rubber tube 2 and the inner wall surface of the heat conduction shell 1 in a matching way, and paraffin 5 is filled in the closed cavity; the transparent cover 3 is buckled at the top of the rubber tube 2 and buckled with the heat conducting shell 1, inserting holes for inserting the push rod 4 are correspondingly formed in the transparent cover 3 and the rubber tube 2, and the push rod 4 penetrates through the transparent cover and then extends into the rubber tube 2.

Specifically, a heat conduction shell 1 and a transparent cover 3 in the device are connected together through a spigot, paraffin 5 is filled between a rubber tube 2 and the heat conduction shell 1, and a push rod 4 is arranged at a core part of the rubber tube 2. When the device is arranged on the side surface of the roller way bearing seat through the connecting piece and is close to the bearing outer ring area (a counter bore can be formed in the side surface of the roller way bearing seat to enable the device to be embedded into the roller way bearing seat), when the paraffin 5 expands when being heated to extrude the rubber tube 2, the rubber tube starts to extrude the push rod 4, the push rod moves upwards, and the high-temperature abnormal condition of the temperature near the bearing is displayed. The heat and the external environment that this scheme utilization paraffin gathered bearing failure final stage cause abnormal operating temperature, then turn into the motion of push rod 4 with the deformation of paraffin expend with heat and contract with cold, the visual inspection of being convenient for.

On the basis of the scheme, an indication rod 6 and a mounting shell 7 can be further added; namely, the heat conduction shell 1 is fixedly arranged on the installation shell 7, the installation shell 7 is arranged on the side surface of the roller way bearing seat through a connecting piece, and the heat conduction shell (and the rubber tube 2, the transparent cover 3 and the push rod 4 in the heat conduction shell) is still embedded in the counter bore on the side surface of the roller way bearing seat. The mounting shell 7 is provided with an indicating rod 6 through a threaded sleeve 8, the indicating rod 6 is inserted into the threaded sleeve 8 and correspondingly arranged at the top (also referred to as "extending end") of the push rod 4, and the indicating rod 6 can extend out of the threaded sleeve 8 under the pushing of the push rod 4. The instruction pole 6 and the push rod 4 that add are the segmentation structure of mutually supporting, and push rod 4 releases instruction pole 6, makes things convenient for equipment inspection personnel to observe, even if not discover in time, shuts down the back bearing frame temperature cooling to room temperature, and push rod 4 appears retracting, because instruction pole 6 adopts the segmentation structure with push rod 4, and instruction pole 6 still stops in the trouble indication position, has guaranteed the reliability of monitoring. After the fault is removed, the indicating rod 6 can be manually pressed back to the normal state, and the bearing is monitored again.

As a further improvement of the above scheme, the device further comprises a resetting mechanism, wherein the resetting mechanism comprises a connecting sleeve A9, a connecting sleeve B10, a spring 11 and a connecting sleeve C12; the connecting sleeve A9 is arranged at the top of the push rod 4, the connecting sleeve B10 is arranged below the connecting sleeve A9, the connecting sleeve C12 is arranged opposite to the connecting sleeve B10, the lower end of the connecting sleeve C12 is fixedly arranged on the mounting shell 7, the connecting sleeve C12 is matched with the connecting sleeve B10 to form a cavity, and the spring 11 is arranged in the cavity.

Specifically, a round hole is formed in the connecting sleeve A9 in the scheme, the round hole penetrates through the end of the push rod 4 and presses against the boss of the end of the push rod 4, the spigot 1201 below the connecting sleeve C12 presses against the boss below the heat-conducting shell 1, and the connecting sleeve a, the connecting sleeve B, the connecting sleeve C and the spring press the push rod 4 into the rubber tube 2 together to form a temperature detection action and reset mechanism, as shown in fig. 4. When the paraffin 5 expands due to heat to extrude the rubber tube 2, the rubber tube 2 extrudes the push rod 4 again, the push rod 4 moves upwards, and meanwhile, the connecting sleeve A9 and the connecting sleeve A9 are pushed to drive the connecting sleeve B10 to move upwards and compress the length of the spring 11. When the temperature near the heat-conducting shell 1 is reduced, the volume of the paraffin 5 is reduced, the connecting sleeve B10 is pushed under the action of the restoring force of the spring, the connecting sleeve B10 drives the connecting sleeve A9, and the push rod 4 is pressed back into the rubber tube.

The installation shell 7 in this scheme mainly comprises a base plate 701 and a gland 702, wherein the base plate 701 is arranged outside the connecting sleeve C12 and is buckled with the connecting sleeve C12, and the gland 702 is covered on the base plate 701 and is connected with the base plate 701 through a connecting piece. Correspondingly, the heat conducting shell 1 is fixedly arranged on the seam allowance 1201 at the inner side of the connecting sleeve C12, which is a structural design matched with the resetting mechanism.

It should be noted that the return mechanism has a variant. The specific scheme is as follows: the connecting sleeve A9 penetrates through the end of the push rod 4 and is pressed against a boss of the end of the push rod 4, one end of the tension spring is hooked on the lower end face of the connecting sleeve A, and the other end of the tension spring is correspondingly hooked on the mounting shell 7 (located below the connecting sleeve A) (equivalent to the base plate 701).

Preferably, the extruding end of the push rod 4 is of a conical structure to facilitate the extrusion of the push rod.

In this scheme, heat conduction casing 1 is the tubular structure that one end is sealed, the other end has the tang.

Preferably, the indication rod 6 is provided with a color ring and scales. Through coating colour ring and scale on indicator lever 6, can judge the removal length of indicator lever with the help of colour and scale, convenient observation. The screw sleeve 8 is in threaded connection with the gland 702, and the front end of the indicating rod 6 can be adjusted to be flush with the front end of the screw sleeve 8 by rotating the adjusting screw sleeve 8. A certain friction force exists between the screw sleeve 8 and the indicating rod 6, and the indicating rod 6 can be kept relatively still by the friction force.

Referring to fig. 5, the diagnostic method based on the hot-rolled strip steel roller way bearing state diagnostic device specifically includes the following steps:

s1, mounting a diagnostic device on the side surface of a bearing seat 13, wherein during mounting, a heat conduction shell 1, paraffin 5 and a rubber tube 2 in the heat conduction shell are close to a bearing area and used for monitoring the temperature of an outer ring of the bearing seat 13;

s2, when the temperature of a bearing working area exceeds the working temperature (about 95 ℃) of the bearing in an abnormal condition, heat is transmitted to paraffin 5 through the heat conduction shell 1, the paraffin 5 expands when heated to extrude the rubber tube 2, the rubber tube 2 pushes the push rod 4 out of the heat conduction shell 1 for a certain distance, and the extended push rod 4 pushes the indicating rod 6;

s3, cooling the bearing seat 13 to room temperature after stopping, restoring the push rod 4 to the original position under the action of the spring 11, and stopping the indicating rod 6 at the fault indicating position;

and S4, manually pressing the indicating rod 6 back to a normal state after the fault is eliminated, and monitoring the bearing again.

The diagnosis method utilizes the characteristics of expansion with heat and contraction with cold and large volume change of paraffin, the diagnosis device (the gland 702 and the base plate 701) is arranged on the side surface of the roller way bearing seat 13 in the area close to the outer ring of the bearing 14 through bolts, and the heat conduction shell 1 is embedded into the counter bore of the bearing seat 13. The abnormal working temperature caused by temperature rise at the end of the failure of the bearing 14 or the external environment is collected by means of paraffin characteristics, the temperature rise near the bearing is converted into the displacement of the push rod, and therefore the temperature of the bearing is detected macroscopically.

Preferably, the diagnosis device is horizontally installed, and the horizontal installation refers to that the central axes of the push rod 4 and the indicating rod 6 in the diagnosis device are in a horizontal state after installation. To ensure that the diagnostic device is as close/as possible to the bearing, it is preferred that the diagnostic device is mounted centrally so that the centre axis of the push rod 4 is located on the horizontal centre plane of the bearing.

When bearing seat temperature is abnormal, namely a bearing is in a 'fault state' or the bearing is to have a 'temperature causing bearing fault':

the heat heats the paraffin through the heat conduction shell, the paraffin expands in volume, when the temperature reaches about 95 ℃, the paraffin expands to the maximum value, the stroke of the push rod reaches about 10mm at the maximum, and the push rod pushes the front end indicating rod to move so as to give a warning signal. The indicating rod and the push rod are independent parts, and the indicating rod only records the highest temperature state of the bearing seat close to the bearing area.

When the fault is eliminated:

the temperature reduces, and the paraffin volume reduces in the heat conduction casing, and the push rod is pressed back to in the rubber tube by the spring, needs the manual work to push back the indicator rod and withstands the push rod, can rotate the adjustment swivel nut according to actual conditions simultaneously to the indicator rod and flush with the swivel nut front end.

The scheme can warn the fault of the bearing in advance and discover the abnormal working state of the bearing in time so as to arrange a maintenance window in advance or arrange equipment maintenance in time by utilizing sporadic downtime, thereby greatly reducing the roller way blocking fault caused by bearing failure.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (5)

1. A hot-rolled strip steel roller way bearing state diagnostic device comprises a heat conduction shell, a rubber tube, a transparent cover and a push rod; the rubber tube is inserted in the heat conduction shell in the middle, the outer side surface of the rubber tube is matched with the inner wall surface of the heat conduction shell to form a closed cavity, and paraffin is filled in the closed cavity; the transparent cover is buckled at the top of the rubber pipe and buckled with the heat conducting shell, inserting holes for inserting the push rod are correspondingly formed in the transparent cover and the rubber pipe, and the push rod penetrates through the transparent cover and extends into the rubber pipe; the method is characterized in that: the device also comprises an indicating rod and a mounting shell; the heat conduction shell is fixedly arranged on the installation shell, an indication rod is arranged on the installation shell through a threaded sleeve, the indication rod is correspondingly arranged at the top of the push rod, and the indication rod can extend out of the threaded sleeve under the pushing of the push rod;

the reset mechanism comprises a connecting sleeve A, a connecting sleeve B, a spring and a connecting sleeve C; the connecting sleeve A is arranged at the top of the push rod, the connecting sleeve B is arranged below the connecting sleeve A, the connecting sleeve C and the connecting sleeve B are oppositely arranged, the lower end of the connecting sleeve C is fixedly arranged on the mounting shell, the connecting sleeve C and the connecting sleeve B are matched to form a cavity, and the spring is arranged in the cavity;

the installation shell consists of a base plate and a gland, wherein the base plate is arranged on the outer side of the connecting sleeve C and is buckled with the connecting sleeve C, and the gland cover is buckled on the base plate and is connected with the base plate through a connecting piece; the heat conduction shell is fixedly arranged on the seam allowance positioned on the inner side of the connecting sleeve C.

2. The hot-rolled strip steel roller way bearing state diagnostic device according to claim 1, characterized in that: the extrusion end of the push rod is of a conical structure.

3. The hot-rolled strip steel roller way bearing condition diagnosis device according to claim 1 or 2, characterized in that: the heat conduction shell is a tubular structure with one closed end.

4. The hot-rolled strip steel roller way bearing state diagnosis device according to claim 1, characterized in that: the indicating rod is provided with a color ring and scales.

5. The diagnostic method of the hot-rolled strip steel roller way bearing state diagnostic device based on claim 1 is characterized by comprising the following steps:

s1, horizontally installing a diagnosis device on the side surface of a bearing seat, wherein during installation, the central axes of a push rod and an indication rod are positioned on the horizontal central plane of a bearing, and a heat conduction shell and paraffin and a rubber tube in the heat conduction shell are close to a bearing area and are used for monitoring the temperature of an outer ring of the bearing seat;

s2, when the temperature of a bearing working area exceeds the working temperature of the bearing in an abnormal condition, heat is transferred to paraffin through the heat conduction shell, the paraffin expands when heated to extrude a rubber tube, the rubber tube pushes the push rod out of the heat conduction shell for a certain distance, and the extended push rod pushes the indicating rod;

s3, cooling the bearing seat to room temperature after stopping, restoring the push rod to the original position under the action of the spring, and stopping the indicating rod at the fault indicating position;

and S4, manually pressing the indicating rod back to a normal state after the fault is eliminated, and monitoring the bearing again.

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