JPH0158771B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a bearing abnormality detection device that detects an abnormality in a bearing used in a rotating body at an early stage and prevents the spread of an accident in the rotating body due to this abnormality. This is related to the improvement of.

[Conventional technology]

Conventional devices of this type include mounting a temperature measuring element or a pressure measuring element that detects vibrations of the rotating shaft on a bearing that supports the rotating shaft of a rotating body, and detecting the temperature of the bearing or the vibration of the rotating shaft. There are known devices that detect this abnormality. These detection devices are configured to determine that there is an abnormality in the temperature or vibration of the bearing and issue a warning or stop the rotating body when the detected value exceeds a predetermined value. Ta.

Incidentally, as such a detection means, it has conventionally been done to attach a plurality of the above-mentioned temperature measuring elements or pressure measuring elements to each bearing. This is merely a method for determining whether or not the detection means is present, and no consideration is given to the correlation between the detection values of the respective detection means. It is true that multiple detectors have been mounted on a single bearing in the past, but these were simply mounted for measurement, recording, and backup purposes. It was hot.

Therefore, with the conventional means described above, it is not possible to accurately detect abnormalities in locations other than these detection locations.In other words, it is not possible to detect abnormalities in the rotating shaft from a global perspective, which may cause the bearing to seize up. However, it has the disadvantage that it is not possible to detect this abnormality until it burns out or, in the worst case, breaks the rotating body.

On the other hand, the values detected for each bearing are only used for each bearing, so any abnormalities such as the degree of inclination of the rotating shaft inserted between these bearings are not detected at all. I couldn't do it.

[Problem to be solved by the invention]

Conventional bearing abnormality detection devices are configured as described above, and merely determine whether each detection means exceeds a predetermined value, and no consideration is given to the correlation of detected values between each detection means. Therefore, there was a problem in that abnormalities in the rotating shaft could not be detected from a comprehensive perspective, and seizing or burning of the bearing or damage to the rotating body could not necessarily be prevented.

On the other hand, when there are multiple bearings supporting the rotating shaft, the detected values are only used for each of those bearings, so the tilt of the rotating shaft supported between the bearings is The drawback was that it was impossible to detect any abnormalities such as the degree of

The present invention has been made in view of the above points, and an object of the present invention is to provide a bearing abnormality detection device that can detect abnormalities in a rotating body early and reliably.

[Means to solve the problem]

In order to achieve the above-mentioned object, a first aspect of the present invention includes a plurality of detection means installed at equal intervals in the circumferential direction of a bearing member supporting a rotating shaft member to detect physical quantities generated in the bearing member; a converter that receives electrical signals corresponding to each detection value of the detection means and converts them into signals suitable for calculation;
Based on the signal from this converter and the installation position of each of the above-mentioned detection means, the above-mentioned detection values are correlated with each other to calculate an index value to specify, and whether this index value is within a predetermined setting circle area or not. The present invention is characterized in that it includes a calculation alarm section that determines eccentricity abnormality of the rotating shaft member and issues an alarm.

In order to achieve the above-mentioned object, a second aspect of the present invention provides a bearing abnormality detection device for detecting an abnormality due to eccentricity of a rotating shaft member of a rotating body having a plurality of bearing members. A plurality of detection means for detecting physical quantities at a location are provided, and based on these detection values and the mounting position of each of the detection means, an index value specified in relation to each of the detection means values is determined in relation to the plurality of bearing members. The eccentricity abnormality of the rotating shaft member is determined based on the correlation between these index values, and an alarm is issued.

[Effect]

According to the first aspect of the present invention, a plurality of detection means for detecting physical quantities are provided in the bearing member at equal intervals in the circumferential direction, and index values are specified in relation to each other based on the detection values of these detection means. is calculated, and depending on whether or not this index value is within a predetermined setting circle, an eccentricity abnormality of the rotating shaft member is determined and an alarm is issued. It becomes possible to detect

According to the second aspect of the present invention, each bearing member is provided with a plurality of detection means for detecting physical quantities at a plurality of locations, and each of the above-mentioned detections is performed based on the mounting position of these detectors and each of the above-mentioned detection means. An index value specified in relation to the means value is calculated for each of the plurality of bearing members, and an eccentricity abnormality of the rotating shaft member is determined based on the mutual relationship between these index values and an alarm is issued. The degree of inclination of the axis can be detected quickly and reliably from the correlation of the detected values.

〔Example〕

Hereinafter, the first invention of the present application will be described in detail based on the embodiment shown in FIGS. 1 and 2. In the figures, 1 is a bearing member, and 2 is rotatably fitted into the bearing member 1. Shafts 3, 4 and 5 are temperature measuring elements mounted in the bearing member 1 at equal intervals in the circumferential direction and at equal radial dimensions from the axis thereof,
The function is to detect the temperature distribution of the bearing member 1 due to wear heat generated when the shaft 2 is operated. 6
Reference numeral 8 indicates a converter that receives electrical signals corresponding to the temperatures detected by the temperature measuring elements 3, 4, and 5 and converts them into signals suitable for calculation by the calculation alarm section 7. 8 is a shaft core.

The two-dot chain lines indicated by A, B, and C indicate each temperature measuring element 3,
4 and 5, an axis showing the temperature distribution of each detected part;
T ₃ , T ₄ , T ₅ are the temperature measuring element 3 at a certain point in time,
Point 9 is a circle formed by the correlation between points T ₃ , T ₄ and T ₅ , where the detected temperatures of points 4 and 5 are plotted.
O indicates the center of this circle 9. These circles 9 and their centers O are determined by the arithmetic processing of the arithmetic section of the arithmetic alarm section 7. T' ₃ , T' ₄ , T' ₅ are points indicating the detected temperatures of each temperature measuring element 3, 4, 5 at different times, and 10 is a point determined by these points T' ₃ , T' ₄ , T' ₅ . O' indicates the center of this circle 10.

Reference numeral 11 is a planned circular alarm setting circle, and the center of the circle formed by the correlation between the detected temperatures of each temperature measuring element 3, 4, and 5 is this setting circle 11.
When the vehicle deviates outside, the calculation alarm section 7 is configured to issue an alarm.

Therefore, now the points T′ ₃ ,
When the temperatures shown at T' ₄ and T' ₅ are detected and the signals corresponding to the temperatures are input to the calculation alarm unit 7 via the converter 6, the calculation alarm unit 7 detects each of the above points.
Circle 1 specified in relation to T′ ₃ , T′ ₄ , T′ ₅
0 and its center O′, and find its center
Since O' is outside the scheduled alarm setting circle 11, it is determined that a temperature deviation has occurred in the bearing member 1, in other words, an eccentricity abnormality has occurred in the shaft 2, and an alarm is issued. Therefore, the eccentricity abnormality of the shaft 2 due to the temperature deviation of the bearing member 1 is reliably notified by the alarm of the calculation alarm unit 7, so that it becomes possible to know the abnormality of the bearing member 1 and the shaft 2 at an early stage and with certainty. .

Therefore, according to the present invention, it is possible to detect abnormalities in the rotating shaft in a global manner, and therefore it is possible to reliably detect abnormalities in locations other than each detection section.

Next, FIG. 2 shows a device for detecting bearing abnormality by detecting the shaft runout of the shaft 2 fitted into the bearing member 1. The description will be given using the same reference numerals.
In the same figure, numerals 3 and 4 are pressure measuring elements that detect the amount of axial runout of the shaft 2 toward the bearing member 1, and are mounted on the outer circumference of the bearing member 1 at an interval of 90° as shown in the figure. ing. A and B are axes on which the detection values of each detector 3 and 4 are plotted as points P ₃ and P ₄ , P _{3 and} 4 are the composite points of each point P ₃ and P ₄ , and the above two axes A and B are plotted. The connections between the intersection and points P _{3, 4} are represented by vector quantities. This vector quantity is subjected to calculation processing via the converter 6 and calculation alarm section 7 connected to each pressure measuring element 3, 4, and when this vector quantity protrudes outside the alarm setting circle 11, the calculation alarm section 7 detects an abnormality in the bearing. However, in other words, the system is configured so that abnormalities in the shaft 2 are notified.

It is clear that the same effects as in the above embodiment can be achieved in this embodiment as well.

On the other hand, if there are multiple bearings that support the rotating shaft, the degree of inclination of the shaft core inserted between these bearing members can be detected by correlating the detected values between the multiple bearing members. can do.

Hereinafter, this second invention will be explained based on FIG. 3. In the figure, 1A, 1B, and 1C are upper bearing members,
Intermediate bearing member and lower bearing member, 8A, 8B,
8C is the center of each bearing member 1A, 1B, 1C,
OA, OB, OC are, for example, each bearing member 1A, 1B,
The temperature center 12 is determined by arithmetic processing based on the detected value of each temperature measuring element (not shown) of 1C, and the temperature center 12 is formed in relation to each temperature center of the upper bearing member 1A and the intermediate bearing member 1B. With the wiring connection, each bearing member 1
An inclination angle α is formed with the connection of the axes A and 1B. Reference numeral 13 denotes connections formed in relation to each other at the temperature centers of the intermediate bearing member 1B and the lower bearing member 1C, forming an inclination angle β with the axes 8B and 8C.

Therefore, the preset inclination angle corresponding to the set circle in the above embodiment and the inclination angle α,
If the angle of inclination exceeds the set value by comparing the angle of inclination with Not only can it be detected reliably, but also it is possible to detect abnormalities in the unbalanced loads between the bearing members early and reliably.

〔Effect of the invention〕

As described above, according to the first aspect of the present invention, a plurality of detection means are installed at equal intervals in the circumferential direction of a bearing member supporting a rotating shaft member to detect physical quantities generated in the bearing member, and A converter that receives electrical signals corresponding to each detection value of the detection means and converts them into signals suitable for calculation, and a converter that receives the electrical signals corresponding to each detection value of the detection means and converts them into signals suitable for calculation, and a converter that receives the electric signals corresponding to each detection value of the detection means and converts them into signals suitable for calculation. and a calculation alarm section that calculates index values to be specified in relation to each other, and determines eccentricity abnormality of the rotating shaft member based on whether or not the index values are within a predetermined set circle area, and issues an alarm. Since it constitutes a bearing abnormality detection device, it is possible to quickly and reliably discover abnormalities in locations other than each detection location from an overall perspective.

According to the second aspect of the present invention, each bearing member is provided with a plurality of detection means for detecting physical quantities at a plurality of locations, and each of the above-mentioned detections is performed based on these detected values and the mounting position of each of the above-mentioned detection means. An index value specified in relation to the means value is calculated for each of the plurality of bearing members, and an eccentricity abnormality of the rotating shaft member is determined based on the mutual relation of each of these index values, and an alarm is issued. Therefore, it is expected that the degree of inclination of the axis can be detected quickly and reliably from a global perspective by grasping the correlation between the detected values.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an abnormality detection device based on bearing temperature showing an embodiment of the first invention in the present invention, and FIG. 2 is an explanatory diagram of an abnormality detection device due to shaft runout showing another embodiment of the first invention. FIG. 3 is a diagram showing the principle of detecting the inclination of a shaft between a plurality of bearings, showing an embodiment of the second aspect of the present invention. 1: Bearing member, 2: Shaft (rotating shaft member),
3, 4, 5: temperature measuring element, pressure measuring element (detection means),
7: Arithmetic alarm unit (arithmetic processing means), 8: 8A, 8
B, 8C: Axial center, 9, 10: Circle, 11: Alarm setting circle (predetermined circle), O, O', OA, OB,
OC: center of circle, α, β: angle of inclination.

Claims (1)

[Scope of Claims] 1. A plurality of detection means installed at equal intervals in the circumferential direction of a bearing member that supports a rotating shaft member to detect physical quantities generated in the bearing member, and a plurality of detection means corresponding to each detection value of these detection means. a converter that receives the electrical signals and converts them into signals suitable for calculation, and the detected values are determined in relation to each other based on the signal from the converter and the mounting position of each of the detection means. A bearing comprising: a calculation alarm unit that calculates an index value, determines eccentricity abnormality of the rotating shaft member based on whether the index value is within a predetermined set circle area, and issues an alarm. Anomaly detection device. 2 As the above-mentioned detection means, there are three locations inside the bearing member.
The bearing abnormality detection device according to claim 1, characterized in that temperature measuring elements for detecting the temperature distribution of the bearing member are arranged internally at equal intervals and in a symmetrical shape. 3. Claims characterized in that, as the detection means, pressure measuring elements for detecting the amount of shaft runout of the rotating shaft member relative to the bearing member are mounted at two locations on the outer circumference of the bearing member at an interval of 90°. The bearing abnormality detection device according to item 1. 4. In a bearing abnormality detection device that detects an abnormality due to eccentricity of a rotating shaft member of a rotating body having a plurality of bearing members, each of the above-mentioned bearing members is provided with a plurality of detection means for detecting physical quantities at a plurality of locations, and these detected values are Based on the mounting position of each of the above-mentioned detection means, an index value specified in relation to each of the above-mentioned detection means values is calculated for each of the plurality of bearing members, and rotation is determined based on the mutual relationship of each of these index values. A bearing abnormality detection device characterized by determining eccentricity abnormality of a shaft member and issuing an alarm.