JP2005233340A - Data transmitting unit for driving shaft, lid for grease supplying hole of bearing cup, and driving shaft monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately monitor the progressing rate of defects based on the data detected by a sensor in a driving shaft, etc. in rolling facilities. <P>SOLUTION: In the driving shaft connected with a cross joint 11, data transmitting units 1 to 4, which are connected to sensors 151 to 154 for detecting defects of the driving shaft and have a radio system type wireless substrate (a data transmitting section) for transmitting the detected data from the sensors, are mounted on the lid 14 attached to a hole 131b which is formed on a bearing cup 13 to supply grease. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drive shaft data transmission unit that transmits data related to a drive shaft such as a rolling facility, a bearing cup grease injection lid that can transmit the data, and a drive shaft monitoring system that monitors the drive shaft.

For example, a drive shaft of a rolling mill for steel is connected between a rolling roller and a drive motor, and plays a role of transmitting the rotational force of the drive motor to the rolling roller. A cross shaft joint is provided in the middle of the drive shaft. In the rolling equipment, the steel material is rolled in a state where the movement of the rolling roller is allowed by the joint. However, during rolling of steel, a large load due to impact or the like is applied to the cross joint, so that it is difficult to avoid damage due to long-term use. Therefore, it is necessary to monitor the progress of damage and replace the cross shaft joint as soon as possible. More specifically, the cross shaft joint is provided with a bearing cup for each of the four trunnions of the cross shaft, and a drive shaft portion and a driven shaft respectively disposed on the drive motor side and the rolling roller side of the drive shaft. The joint is assembled to the drive shaft by connecting each end of the part to two different bearing cups. However, the load applied to the trunnion and each bearing cup from the rolling roller side during steel rolling is extremely large, and the trunnion surface was easily peeled off depending on the usage time. In addition, the degree of surface peeling sometimes differs between the four trunnions. Therefore, in rolling equipment, the cross shaft joint is periodically removed from the drive shaft, and the trunnion and bearing cup are separated to completely disassemble the cross shaft joint, thereby reducing the degree of surface peeling at each trunnion. It was required to visually check and replace the cross joint etc. as necessary, and this periodic inspection work required a lot of labor and time.
On the other hand, a system provided with a temperature sensor that detects the temperature at the cross joint and a transmitter that wirelessly transmits the sensor output is proposed as a conventional system, for example, as described in Patent Document 1 below. .

Japanese Patent Laid-Open No. 2001-304975 (pages 3 to 4, FIG. 3)

By the way, the conventional system monitors the temperature at the cross joint used for the drive shaft connecting between the pair of differential devices provided in the vehicle. In this system, the temperature sensor and the transmitter are connected. The included unit was attached to the center of the cross shaft of the cross shaft joint.
However, in a rolling facility or the like, the cross shaft of the cross shaft joint is covered in the axial direction by the four bearing cups, and the end portions of the drive shaft and the driven shaft are substantially at the center of the cross shaft. The cross shafts are connected so as to be in close contact with each other, and are incorporated in the drive shaft without being exposed to the outside. For this reason, it was difficult to attach a transmitter or the like to the cross shaft as in the conventional system. In addition, although it is conceivable to attach a transmitter or the like to each shaft portion of the drive shaft, in the configuration in which the two drive shafts are arranged close to each other as in the above-described rolling equipment, their mounting space is attached to the drive shaft shaft portion. It was difficult to secure. For this reason, in such rolling equipment, the drive shaft cannot be monitored by sensor output.
Therefore, an object of the present invention is to provide a new technical means that can accurately monitor the progress of damage based on the detection data of a sensor even in a drive shaft of a rolling facility.

The drive shaft data transmission unit of the present invention is a data transmission unit attached to the drive shaft,
The drive shaft includes a cruciform joint having a bearing cup, and a wireless data transmission unit connected to a sensor for detecting damage to the drive shaft and transmitting detection data from the sensor includes the bearing. It is characterized by being attached to a cup.

  In the drive shaft data transmission unit configured as described above, a data transmission unit that transmits detection data from the sensor is attached to the bearing cup. This makes it possible to attach the data transmission unit etc. unlike the conventional example, even when the cross shaft of the cross shaft joint is incorporated into the drive shaft with almost no external exposure, such as in rolling equipment. The drive shaft can be accurately monitored using the sensor detection data from the transmitter.

In the drive shaft data transmission unit, it is preferable that the data transmission unit is disposed in a grease injection hole formed in the bearing cup.
In this case, the data transmission unit can be attached to the cup without providing a recess or the like in the bearing cup.

Further, the bearing cup grease injection hole lid of the present invention is a lid attached to a grease injection hole formed in a bearing cup of the cross shaft joint in a drive shaft provided with a cross shaft joint,
A data transmission unit comprising a battery power source and a wireless data transmission unit connected to a sensor for detecting damage to the drive shaft and transmitting detection data from the sensor is mounted. To do.

  The lid for the bearing cup grease injection hole configured as described above has a battery power source and a data transmission unit, and a wireless unit capable of transmitting data from the sensor is mounted on the lid. The wireless unit can be attached to a grease injection hole formed in the cross joint of the shaft. Therefore, it is possible to monitor the drive shaft whose progress of damage cannot be monitored, and the periodic inspection work can be omitted.

The drive shaft monitoring system of the present invention is a system for monitoring a drive shaft that is used in rolling equipment and has a cross shaft joint,
A sensor for detecting damage of the cross shaft of the cross shaft joint is provided, and a data transmission unit including a wireless data transmission unit connected to the sensor and transmitting detection data from the sensor is provided as the cross It is attached to the bearing cup of a shaft coupling.

  In the drive shaft monitoring system configured as described above, the detection data of the sensor can be acquired from the data transmission unit attached to the bearing cup, so that the progress degree of damage to the drive shaft can be easily detected. It is possible to perform maintenance work of the drive shaft including replacement work of the cross shaft joint at an appropriate time without carrying out periodic inspection work on the drive shaft, thus simplifying this work easily. Can be planned. In addition, since the sensor is provided on the cross shaft, it is possible to monitor the progress of the damage of the drive shaft with high accuracy and obtain a more accurate diagnosis result.

  According to the present invention, the data transmission unit that wirelessly transmits the detection data from the sensor for detecting damage to the drive shaft can be attached to the drive shaft of the rolling equipment. It is possible to accurately monitor the degree of progress of damage to the drive shaft, and it is possible to appropriately perform diagnosis of the drive shaft and maintenance work based on the diagnosis result.

Hereinafter, preferred embodiments of a data transmission unit for a drive shaft, a lid for a bearing cup grease injection hole, and a drive shaft monitoring system according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a drive shaft used in rolling equipment of a steel manufacturer, and FIG. 2 is a view of a main part of a cross joint from the axial direction of the drive shaft (including a partial cross section). . In the figure, a cross joint 11 is used in the vicinity of both ends of the drive shaft 10, and a drive motor (not shown) is provided on one end side and the other end side of the drive shaft 10 with the joint 11 interposed therebetween. Steel rolling rollers are connected to each other. That is, in addition to the intermediate shaft portion (first shaft portion) 10a disposed between the two cross joints 11, the drive shaft 10 includes a drive shaft portion (second shaft) connected to the motor and the roller side, respectively. (Shaft portion) 10b and driven shaft portion (third shaft portion) 10c are provided, and the intermediate shaft portion 10a and the drive shaft portion 10b are connected by one cross shaft joint 11, and the other cross shaft joint 11 is connected. The intermediate shaft portion 10a and the driven shaft portion 10c are coupled (see FIG. 1). Further, in the rolling equipment, two drive shafts 10 are arranged in parallel to each other, and a cast product subjected to a rolling process by passing a slab or the like between the two rollers connected to each drive shaft 10 is used. It is configured to manufacture. In the rolling process, each cross joint 11 transmits the rotational force of the drive motor to the rolling roller in a state where the connected drive shaft 10 is allowed to tilt from the axial direction. Furthermore, in this rolling equipment, the operation state of each drive shaft 10 is monitored by the drive shaft monitoring system using the data transmission unit of the present invention, and the degree of progress of damage associated with the operation time is determined. Yes.

  The cross shaft joint 11 includes a cross shaft 12 and four bearing cups 13, and the four trunnions of the cross shaft 12 so that the bearing cup 13 covers a portion around the cross shaft 12 in the axial direction. It is attached to 12a. Each bearing cup 13 includes a cup portion 131 and a plurality of rollers 132 that are held inside and are in rolling contact with the trunnion 12a. The inner peripheral surface of the cup portion 131 and the outer peripheral surface of the trunnion 12a are respectively provided. Outer ring track and inner ring track. Further, the pair of upper and lower bearing cups 13 in FIG. 2 are arranged on the shaft part (for example, the drive shaft part 10b) of the drive shaft 10 on one side in the axial direction when viewed from the cross joint 11, and the pair of left and right bearing cups 13 are shafts. It is connected to a shaft portion (for example, the intermediate shaft portion 10a) of the drive shaft 10 on the other side in the direction. Specifically, a flange portion formed at an end portion of a corresponding shaft portion of the drive shaft 10 via a bolt screwed into a bolt hole 131 a provided on both the left and right end portions of the cup portion 131 includes the cup portion 131. In the state where the central part of the left and right sides of the cross shaft 12 is almost in close contact with the end of the shaft part, and the cross shaft 12 is incorporated in the drive shaft 10 with almost no exposure to the outside. The shaft is connected.

At the center in the circumferential direction of the cup portion 131, a hole 131b for injecting grease is formed. This hole 131b is used to sequentially discharge the turning oil supplied to the inside in the manufacturing process of the bearing cup 13, more specifically, in the turning process of turning the inside of the cup part 131 into a desired shape. It is provided during the casting process prior to the turning process, and can be appropriately replenished with grease for lubricating the rolling contact portion between the trunnion outer peripheral surface of the roller 132 and the inner peripheral surface of the cup portion.
The hole 131b is removably attached with a lid 14 for a bearing cup grease injection hole to which the data transmission unit is detachably mounted, and the grease leaks to the outside from the rolling contact portion. Is designed to prevent More specifically, the lid 14 has, for example, a flat bottom bowl-shaped attachment portion 14a that is in close contact with the inner peripheral surface of the hole 131b formed in a step shape and substantially seals the hole 131b, and a trunnion from the bottom. And a round bar-like support portion 14b extending in the axial direction of 12a. The support portion 14b is inserted into a hole 12b formed coaxially with the hole 131a and around the central axis of the trunnion 12a, and the bearing cup 13 is inclined with respect to the cross shaft 12 by a predetermined angle or more. Is preventing. Further, for example, an eddy current displacement sensor 151 is attached near the tip of the inserted support portion 14b so as to face the wall surface of the hole 12b.

The data transmission unit 1 that performs wireless data transmission is mounted inside the mounting portion 14a of the lid 14. The transmission unit 1 is connected to the displacement sensor 151 by a cable 16 that passes through a groove provided in or on the surface of the lid 14. The displacement sensor 151 is attached to a predetermined reference position and detects a change in the distance of the hole 12b from the wall surface, thereby increasing the trunnion 12a and the bearing according to the degree of damage such as surface peeling occurring on the trunnion 12a. A displacement signal indicating a relative displacement (positional deviation) from the cup 13 is output to the transmission unit 1.
Similarly, for the other three trunnions 12a, a lid 14 (not shown), displacement sensors 152, 153, 154, and data transmission units 2, 3, 4 are provided, for a total of four units 1-4. The displacement signal data can be transmitted from each.

  Further, as shown in FIG. 3, the data transmission unit 1 is connected to the displacement sensor 151 and inputs the displacement signal, and is also fixed to the bottom of the mounting portion 14a by a fixing means such as a bolt (not shown). A substrate 31, a wireless substrate 32 disposed above the sensor substrate 31, and a battery power source 33 disposed above the wireless substrate 32 are provided. In the data transmission unit 1, the boards 31 and 32 and the power source 33 are sequentially connected by connectors that can be separated from each other. The unit 1 is inserted into the screw hole 14c. (Not shown) is housed inside the lid 14 mounted in the hole 131b. That is, the sensor board 31 and the wireless board 32 are connected to the mating connectors 31c and 32c provided to electrically connect the boards 31 and 32, and the wireless board 32 and the battery power source 33 are The mating connectors 32d and 33a provided to each other are connected to each other so that the board 32 and the power source 33 are electrically connected. In FIG. 3, the support portion 14b is not shown for simplification of the drawing. Each of the substrates 31 and 32 is coated with a mold resin, and is configured so that adverse effects due to grease, moisture, and the like are not generated as much as possible on the electronic components such as the circuits of the substrates 31 and 32.

The sensor board 31 appropriately distributes and supplies the direct current from the two AA batteries 33a included in the battery power source 33 and the sensor circuit 31a having a preamplifier function for amplifying the displacement signal from the displacement sensor 151 to each part of the unit. The power supply circuit 31b is provided.
The wireless board 32 includes a transmission circuit 32a configured using, for example, a DSP, and a memory 32b that holds data such as programs used in the transmission circuit 32a and the sensor circuit 31a. The wireless board 32 constitutes a data transmission unit that wirelessly transmits the detection data of the displacement sensor 151. The transmission circuit 32a includes an A / D conversion function for generating displacement signal data by subjecting the displacement signal from the sensor circuit 31a to analog / digital conversion, an oscillation function for oscillating a transmission wave (carrier wave) of a predetermined frequency, and this carrier wave. Is provided with a modulation function for carrying displacement signal data. Further, an antenna 34 disposed near the opening end of the lid 14 above the battery power source 33 is connected to the transmission circuit 32a, and this antenna 34 transmits a transmission wave including a serial data string of the displacement signal data. Call outside. In addition to this description, the antenna 34 may be arranged along the outer surface of the bearing cup 13.

  Similarly to the data transmission unit 1, the other data transmission units 2 to 4 have a substrate and a power source that are divided and arranged in three upper and lower stages, and transmit detection data from the corresponding displacement sensors 152 to 154. It has become. Further, the data transmission units 1 to 4 and the displacement sensors 151 to 154 are included in the drive shaft monitoring system, and each transmission unit 1 to 4 has a continuous integer ID number 0 as an identifier. , 1, 2 and 3 are transmitted, and the transmission circuit 32a of each of the units 1 to 4 transmits a transmission wave including, for example, an ID number assigned to the header portion when transmitting sensor detection data. Is configured to do. And each transmission unit 1-4 and the displacement sensors 151-154 can be specified in a drive-axis monitoring system. In addition, by assigning different ID numbers to the transmission units 1 to 4 in this way, even if the sensor connected to the unit is changed, the trouble of changing the ID number of the unit can be omitted. Further, in each of the transmission units 1 to 4, as described above, the sensor board 31, the wireless board 32, and the battery power source 33 to which different functions are given are connected to each other through the corresponding fitting connectors. For example, even when the sensor is changed, the new sensor detection data can be transmitted by changing only the sensor substrate.

  As shown in FIG. 4, the drive shaft monitoring system S includes displacement sensors 151 to 154 (FIG. 2), data transmission units 1 to 4 to which corresponding sensors 151 to 154 are connected, and each of these transmission units 1. The receiver 5 which receives the transmission wave from -4 is provided. The receiver 5 is connected to a panel computer 7 disposed in the rolling facility via a communication line 6a compliant with, for example, RS232C. Further, a personal computer (hereinafter abbreviated as “PC”) 8 installed in a monitoring room away from the rolling equipment is connected to the panel computer 7 via a LAN using, for example, a 10Base-T line. The PC 8 is configured to be connectable to an information processing terminal 21 such as a manufacturer of the cruciform joint 11 or a maintenance company thereof via a communication network 20 such as the Internet. In the drive shaft monitoring system S, the data transmission units 1 to 4 are attached to the four cross shaft joints 11 assembled to the two drive shafts 10, and the panel computer 7 and the PC 8 are connected to the system. The transmission data from all the transmission units included in S is discriminated based on the ID number, and the drive shaft 10 can be monitored in units of the cross joint 11.

The panel computer 7 has, as its computer function, a discrimination / diagnosis function for the degree of damage (progression degree) in the corresponding trunnion 12a (drive shaft 10) based on the detection data from the displacement sensors 151-154, Information management functions necessary for maintenance work of the components of the system S, such as the remaining capacity management of the battery capacity at the battery power supply 33 of each data transmission unit 1 to 4, and the waveform of each detection data and the change in the degree of progress, etc. A monitoring function for displaying predetermined history information on a display is provided by software.
Further, in addition to the above-described computer functions of the panel computer 7, the PC 8 stores input detection data and data such as damage diagnosis results based on the data, or stores the stored data in another information processing terminal 21. A server function that works as a Web server that provides the service is provided.

  In the present embodiment configured as described above, since the data transmission units 1 to 4 including the battery power source 33 and the wireless substrate 32 are attached to the bearing cup 13, the cross of the cross joint 11 is rolled like a rolling facility. Even when the shaft 12 is incorporated into the drive shaft 10 with almost no exposure to the outside, the detection data of the displacement sensors 151 to 154 can be transmitted, and the degree of progress of damage to the drive shaft 10 based on these detection data Can be accurately monitored. Therefore, the damage diagnosis of the drive shaft 10 can be performed with high accuracy, and maintenance work based on the high-precision diagnosis results can be performed without performing the conventional periodic inspection work and the disassembly work of the cross shaft joint 11 and the like. It can be done properly at the right time.

In this embodiment, since the data transmission units 1 to 4 to which the displacement sensors 151 to 154 are connected are attached to the lid 14, the sensor and its transmission data are transmitted to the existing drive shaft. The unit can be easily installed, the degree of progress of damage to the drive shaft can be monitored, and periodic inspection work and the like can be omitted. Furthermore, since the wireless unit connected to the sensor is detachably attached to the lid 14 that can be attached to and detached from the bearing cup 13, the replacement work of these sensor and unit can be easily performed.
Furthermore, in this embodiment, the displacement sensors 151 to 154 detect the degree of progress of damage (the degree of peeling that has occurred on the surface) in each of the four trunnions 12a of the cross shaft 12, so that the damage for each trunnion 12a is detected. It is possible to accurately grasp, and it is possible to perform repair work (re-polishing) or the like corresponding to the degree of damage for each trunnion 12a.

  In the above description, the case where the data transmission unit is disposed inside the grease injection hole has been described. However, the present invention is connected to a sensor for detecting damage to the drive shaft, and the detection data from the sensor is used. Any wireless transmission data transmission unit may be attached to the bearing cup. If the operation of the drive shaft is not hindered, the data transmission unit may be attached outside the bearing cup. Further, for example, a concave portion or the like may be provided on the surface of the bearing cup, and the data transmission unit may be disposed inside the cup. However, as described above, the case where the data transmission unit is arranged inside the grease injection hole formed in the bearing cup is preferable because the unit can be attached easily and at low cost.

Further, in the above description, the case where the attachment portion of the lid is opened has been described. However, a configuration that protects the data transmission portion attached to the lid by providing a sealing member that seals the opening portion of the lid. But you can. However, when such a sealing member is made of metal, it is preferable to pull out the antenna to the outside.
In the above description, the case where the battery power source using two AA batteries is disposed above the wireless substrate and provided in the grease injection hole is described. For example, a button battery may be attached to a battery holder provided on the sensor substrate, or a lead storage battery constituting a power supply unit common to the four data transmission units may be installed on the cross shaft. However, as described above, the case where the battery power source is arranged on the opening side of the hole is preferable because the battery replacement operation can be easily performed.

  In the above description, the case of using one displacement sensor directly connected to one data transmission unit has been described. However, the present invention is not limited to this, and the installation of the data transmission unit and the sensor is not limited thereto. The number or sensor type (form) is not limited to the above. That is, the sensor only needs to detect a physical quantity that changes due to damage to the drive shaft (surface peeling at the trunnion). For example, a vibration sensor is disposed opposite to the center of the cross shaft and It may be configured to detect vibration. Further, detection data such as force, temperature, or iron powder concentration in grease that increases in accordance with the above-described peeling may be acquired. Further, a plurality of sensors may be connected to one data transmission unit, and the detection data may be transmitted for each sensor from this unit.

  In the above description, the case where the drive shaft monitoring system using the data transmission unit for transmitting the sensor detection data to the outside is described, but the present invention is not limited to this, and the receiver Instead of using a transceiver capable of transmitting an instruction signal from a panel computer or the like, a system capable of bidirectional wireless communication in which the transmission circuit of the wireless board is provided with a reception function for receiving a transmission wave from the transceiver It can also be applied to.

It is a perspective view which shows the drive shaft used for the rolling equipment of a steel maker. It is the figure which looked at the principal part of the cross shaft coupling from the axial direction of the drive shaft (including a partial cross section). It is a figure which shows the principal part structural example of the data transmission unit which concerns on one Embodiment of this invention, and the cover for bearing cup grease injection holes. It is a block diagram which shows the structural example of the drive-axis monitoring system which concerns on one Embodiment of this invention.

Explanation of symbols

1-4 Data Transmitting Unit 10 Drive Shaft 11 Cross Shaft Joint 12 Cross Shaft 12a Trunnion 13 Bearing Cup 131b Grease Filling Hole 14 (Bearing Cup Grease Filling Hole) Cover 32 Wireless Substrate (Data Transmitter)
33 Battery power supply 151-154 Displacement sensor S Drive axis monitoring system

Claims (4)

A data transmission unit attached to the drive shaft,
The drive shaft includes a cross joint having a bearing cup,
A drive-shaft data transmission characterized in that a wireless-type data transmitter connected to a sensor for detecting damage to the drive shaft and transmitting detection data from the sensor is attached to the bearing cup. unit.   2. The drive shaft data transmission unit according to claim 1, wherein the data transmission unit is disposed in a grease injection hole formed in the bearing cup. 3. In a drive shaft provided with a cross shaft joint, a lid attached to a hole for grease injection formed in a bearing cup of the cross shaft joint,
A data transmission unit comprising a battery power source and a wireless data transmission unit connected to a sensor for detecting damage to the drive shaft and transmitting detection data from the sensor is mounted. Bearing cup grease injection hole lid. A system for monitoring a drive shaft which is used in a rolling facility and has a cross shaft joint,
While providing a sensor for detecting damage of the cross shaft of the cross shaft joint,
A drive shaft monitoring system, wherein a data transmission unit including a wireless data transmission unit connected to the sensor and transmitting detection data from the sensor is attached to a bearing cup of the cross joint.

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