阅读说明：本技术 一种轴承温度监控方法及轴承温度监控系统 (Bearing temperature monitoring method and bearing temperature monitoring system ) 是由 刘建路 屈涛 杨庆 廖俊祥 徐磊 范洪军 于 2021-06-29 设计创作，主要内容包括：本发明属于轴承温度监控技术领域,公开了一种轴承温度监控方法及轴承温度监控系统,轴承温度监控方法通过第一温度监测装置监测轴承温度,通过第二温度监测装置监测轴承回油温度。由于轴承润滑油回油温度变化趋势与轴承温度变化趋势相同,因此可以通过润滑油回油温度变化趋势有效监测轴承温度变化趋势,在第一温度监测装置发生故障无监测数据时,可以通过第二温度监测装置测得的回油温度对轴承温度进行间接监测,如果回油温度不大于设定值,轴承可以继续运行。从而在第一温度监测装置发生故障无监测数据时不需要停机维修,避免了影响生产作业导致经济损失。(The invention belongs to the technical field of bearing temperature monitoring, and discloses a bearing temperature monitoring method and a bearing temperature monitoring system. Because bearing lubricating oil return temperature variation trend is the same with bearing temperature variation trend, consequently can effectively monitor bearing temperature variation trend through lubricating oil return temperature variation trend, when first temperature monitoring device breaks down and does not have the monitoring data, can carry out indirect monitoring to bearing temperature through the return oil temperature that second temperature monitoring device surveyed, if return oil temperature is not more than the setting value, the bearing can continue the operation. Therefore, when the first temperature monitoring device breaks down and does not have monitoring data, the first temperature monitoring device does not need to be stopped for maintenance, and the economic loss caused by the influence on production operation is avoided.)

1. A bearing temperature monitoring method, comprising:

monitoring the temperature of the bearing through a first temperature monitoring device, and monitoring the oil return temperature of the bearing lubricating oil through a second temperature monitoring device;

when the first temperature monitoring device has no monitoring data, if the oil return temperature is not greater than a set value A1, the bearing continues to operate.

2. The bearing temperature monitoring method according to claim 1, wherein the bearing continues to operate if the bearing temperature is not greater than a set point B1 without the second temperature monitoring device monitoring data.

3. The bearing temperature monitoring method according to claim 2, wherein when the monitoring data of the first temperature monitoring device is not changed, if the oil return temperature is changed and is not greater than a set value A1, the bearing continues to operate;

when the monitoring data of the second temperature monitoring device is not changed, if the temperature of the bearing is changed and is not greater than a set value B1, the bearing continues to operate.

4. The bearing temperature monitoring method according to claim 3, wherein the control device is capable of shutting down the bearing by receiving and judging the monitoring data of the first temperature monitoring device and the second temperature monitoring device.

5. The bearing temperature monitoring method according to claim 4, wherein when the oil return temperature is greater than the set value A1, the control device closes the bearing;

and when the bearing temperature is higher than the set value B1, the control device closes the bearing.

6. The bearing temperature monitoring method according to claim 5, wherein the control device controls an alarm device to give an alarm when the bearing temperature is greater than a set value B2, wherein the set value B2 is less than the set value B1;

when the oil return temperature is higher than a set value A2, the control device controls the alarm device to give an alarm, and the set value A2 is lower than the set value A1.

7. The bearing temperature monitoring method according to claim 6, wherein the rate of change of the bearing temperature is monitored by the first temperature monitoring device, and if the bearing temperature is greater than a set value B2 and the rate of change of the bearing temperature is greater than a set value C1, the control device shuts down the bearing;

through the monitoring of second temperature monitoring devices the rate of change of oil return temperature, if oil return temperature is greater than setting A2, just when the rate of change of oil return temperature is greater than setting D1, controlling means closes the bearing.

8. A bearing temperature monitoring system, comprising:

the first temperature monitoring device is arranged on the bearing and used for monitoring the temperature of the bearing;

and the second temperature monitoring device is arranged on a lubricating oil return pipeline of the bearing and is used for monitoring the return oil temperature and the change rate of the return oil temperature.

9. The bearing temperature monitoring system of claim 8, wherein the first temperature monitoring device is capable of monitoring a rate of change of the bearing temperature.

10. The bearing temperature monitoring system according to claim 9, further comprising a control device capable of receiving and determining the monitoring data of the first and second temperature monitoring devices and capable of shutting down the bearing.

Technical Field

The invention relates to the technical field of bearing temperature monitoring, in particular to a bearing temperature monitoring method and a bearing temperature monitoring system.

Background

The bearing temperature monitoring is an important measure for ensuring the safe operation of the bearing, the conventional radial bearing temperature monitoring device of the high-speed multistage centrifugal compressor is arranged in the radial bearing at the outlet end of the radial bearing, when the temperature monitoring device is damaged and fails, the high-speed multistage centrifugal compressor needs to be stopped and maintained, the maintenance period is long, and the economic loss is large.

Therefore, a bearing temperature monitoring method and a bearing temperature monitoring system are needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a bearing temperature monitoring method and a bearing temperature monitoring system, which do not need to be stopped for maintenance when a first temperature monitoring device fails and has no monitoring data, so that economic loss caused by influence on production operation is avoided.

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

a bearing temperature monitoring method, comprising:

monitoring the temperature of the bearing through a first temperature monitoring device, and monitoring the oil return temperature of the bearing lubricating oil through a second temperature monitoring device;

when the first temperature monitoring device has no monitoring data, if the oil return temperature is not greater than a set value A1, the bearing continues to operate.

Preferably, if the bearing temperature is not greater than the set point B1 without the second temperature monitoring device monitoring data, the bearing continues to operate.

Preferably, when the monitoring data of the first temperature monitoring device is not changed, if the oil return temperature is changed and is not greater than a set value A1, the bearing continues to operate;

when the monitoring data of the second temperature monitoring device is not changed, if the temperature of the bearing is changed and is not greater than a set value B1, the bearing continues to operate.

Preferably, the control device receives and judges monitoring data of the first temperature monitoring device and the second temperature monitoring device, and the control device can close the bearing.

Preferably, when the oil return temperature is higher than the set value a1, the control device closes the bearing;

and when the bearing temperature is higher than the set value B1, the control device closes the bearing.

Preferably, when the bearing temperature is higher than a set value B2, the control device controls an alarm device to give an alarm, and the set value B2 is lower than the set value B1;

when the oil return temperature is higher than a set value A2, the control device controls an alarm device to give an alarm, and the set value A2 is lower than the set value A1.

Preferably, the first temperature monitoring device monitors the change rate of the bearing temperature, and the control device closes the bearing if the bearing temperature is greater than a set point B2 and the change rate of the bearing temperature is greater than a set point C1;

through the monitoring of second temperature monitoring devices the rate of change of oil return temperature, if oil return temperature is greater than setting A2, just when the rate of change of oil return temperature is greater than setting D1, controlling means closes the bearing.

A bearing temperature monitoring system comprising:

the first temperature monitoring device is arranged on the bearing and used for monitoring the temperature of the bearing;

and the second temperature monitoring device is arranged on a lubricating oil return pipeline of the bearing and is used for monitoring the return oil temperature and the change rate of the return oil temperature.

Preferably, the first temperature monitoring means is capable of monitoring the rate of change of the bearing temperature.

Preferably, the bearing protection device further comprises a control device, wherein the control device can receive and judge monitoring data of the first temperature monitoring device and the second temperature monitoring device, and can close the bearing.

The invention has the beneficial effects that:

according to the bearing temperature monitoring method provided by the invention, the bearing temperature is monitored by the first temperature monitoring device, and the bearing oil return temperature is monitored by the second temperature monitoring device. Because the change trend of the return oil temperature of the bearing lubricating oil is the same as that of the bearing temperature, the change trend of the temperature of the bearing can be effectively monitored through the change trend of the return oil temperature of the lubricating oil. When the first temperature monitoring device breaks down and does not have monitoring data, the temperature of the bearing can be indirectly monitored through the oil return temperature measured by the second temperature monitoring device, and if the oil return temperature is not greater than a set value, the bearing can continue to operate. Therefore, when the first temperature monitoring device breaks down and does not have monitoring data, the first temperature monitoring device does not need to be stopped for maintenance, and the economic loss caused by the influence on production operation is avoided.

Drawings

FIG. 1 is a flow chart of a bearing temperature monitoring method according to an embodiment of the present invention;

fig. 2 is a flowchart of a bearing temperature monitoring method according to a second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

As shown in fig. 1, the present embodiment provides a bearing temperature monitoring method for temperature monitoring of a radial bearing of a high-speed multistage centrifugal compressor. The bearing temperature monitoring method provided by the embodiment comprises the following steps: monitoring the temperature of the bearing through a first temperature monitoring device, and monitoring the oil return temperature of the bearing lubricating oil through a second temperature monitoring device; when the first temperature monitoring device has no monitoring data, if the oil return temperature is not greater than the set value A1, the bearing continues to operate.

According to the bearing temperature monitoring method provided by the embodiment, the bearing temperature is monitored through the first temperature monitoring device, the bearing oil return temperature is monitored through the second temperature monitoring device, and the bearing temperature change trend can be effectively monitored through the lubricating oil return temperature change trend because the bearing lubricating oil return temperature change trend is the same as the bearing temperature change trend. When the first temperature monitoring device fails and has no monitoring data, the temperature of the bearing can be indirectly monitored through the oil return temperature measured by the second temperature monitoring device, and if the oil return temperature is not greater than a set value A1, the bearing can continue to operate.

Specifically, when the bearing operates, the first temperature monitoring device monitors the temperature of the bearing, the second temperature monitoring device monitors the oil return temperature of the bearing, and when the bearing is closed, the first temperature monitoring device and the second monitoring device are closed.

Example two

As shown in fig. 2, the present embodiment provides a bearing temperature monitoring method, which is based on the first embodiment, and further includes that if the bearing temperature is not greater than the set value B1 when the second temperature monitoring device has no monitoring data, the bearing continues to operate.

According to the temperature monitoring method provided by the embodiment, when one of the first temperature monitoring device and the second temperature monitoring device fails, the temperature of the bearing can be continuously monitored through the other one of the first temperature monitoring device and the second temperature monitoring device, so that when the first temperature monitoring device has no monitoring data, if the oil return temperature is not greater than the set value A1, the bearing can continuously operate, and when the second temperature monitoring device has a failure and no monitoring data, if the temperature of the bearing is not greater than the set value B1, the bearing can also continuously operate.

Optionally, as shown in fig. 2, when the monitoring data of the first temperature monitoring device is not changed, the return oil temperature is changed and is not greater than the set value a1, and the bearing continues to operate; when the monitoring data of the second temperature monitoring device is not changed, if the temperature of the bearing is changed and is not greater than a set value B1, the bearing continues to operate. Therefore, when one of the first temperature monitoring device or the second temperature monitoring device fails to cause the measured data not to change, the temperature of the bearing can be monitored through the other one without immediately stopping for maintenance, and economic loss is avoided.

Alternatively, as shown in fig. 2, when the return oil temperature is greater than the set value a1, the control device closes the bearing; when the bearing temperature is higher than the set value B1, the control device closes the bearing. When the oil return temperature measured by the second temperature monitoring device and the bearing temperature measured by the first temperature monitoring device are higher than a set value, the control device closes the bearing, so that the bearing is prevented from being damaged due to overhigh temperature.

Alternatively, as shown in fig. 2, when the bearing temperature is higher than the set value B2, the control device controls the alarm device to give an alarm, and the set value B2 is smaller than the set value B1; when the return oil temperature is higher than the set value A2, the control device controls the alarm device to give an alarm, and the set value A2 is lower than the set value A1. Thereby carry out early warning to the bearing temperature in advance, let the staff can arrange the problem that the bearing appears and deal with before controlling means closes the bearing, avoid controlling means to close the bearing and influence production operation and produce economic loss.

Alternatively, as shown in fig. 2, the control device may close the bearing when the first temperature monitoring device monitors the change rate of the bearing temperature, the bearing temperature being greater than the set point B2, and the change rate of the bearing temperature being greater than the set point C1; and monitoring the change rate of the oil return temperature through a second temperature monitoring device, wherein when the oil return temperature is greater than a set value A2 and the change rate of the oil return temperature is greater than a set value D1, the control device closes the bearing. When one of the bearing temperature or the oil return temperature exceeds a set value and the change rate is too large, the problem that the safety of equipment is endangered by the bearing is solved, and the control device automatically closes the bearing to ensure the safety of the equipment.

EXAMPLE III

The temperature monitoring device of the radial bearing of the prior high-speed multistage centrifugal compressor adopts two temperature measuring probes embedded in the bearing, wherein one temperature measuring probe is a main temperature measuring probe, and the other temperature measuring probe is a standby temperature measuring probe. The main body equipment of the high-speed multistage centrifugal compressor is used as high-value large equipment and has a long design overhaul period, however, in the actual use of the high-speed multistage centrifugal compressor, the service lives of the main temperature measuring probe and the standby temperature measuring probe are far shorter than the design overhaul period of the main body equipment of the high-speed multistage centrifugal compressor, the main body of the high-speed multistage centrifugal compressor is usually in good condition, and the main temperature measuring probe and the standby temperature measuring probe both fail to cause the fault shutdown of the high-speed multistage centrifugal compressor. And because main probe and reserve probe all bury in the bearing deeply, change main temperature probe and reserve temperature probe and need disintegrate high-speed multistage centrifugal compressor unit, the time of maintenance is long with high costs to seriously influence production operation.

The embodiment provides a bearing temperature monitoring system, which is used for maintaining the problem that the conventional radial bearing main probe and temperature measuring probe of a high-speed multistage centrifugal compressor fail to work to cause equipment failure and shutdown.

The bearing temperature monitoring system provided by the embodiment comprises a first temperature monitoring device and a second temperature monitoring device. The first temperature monitoring device is arranged on the bearing and used for monitoring the temperature of the bearing. The second temperature monitoring device is arranged on a lubricating oil return pipeline of the bearing and used for monitoring the return oil temperature and the change rate of the return oil temperature. The bearing temperature is monitored through the first temperature monitoring device, the bearing oil return temperature is monitored through the second temperature monitoring device, and the bearing temperature change trend can be effectively monitored through the lubricating oil return temperature change trend because the bearing lubricating oil return temperature change trend is the same as the bearing temperature change trend. When the first temperature monitoring device breaks down and does not have monitoring data, the temperature of the bearing can be indirectly monitored through the oil return temperature measured by the second temperature monitoring device, and if the oil return temperature is not greater than a set value, the bearing can continue to operate. And monitoring the change rate of the oil return temperature of the lubricating oil through a second temperature monitoring device, and if the oil return temperature is greater than a set value A2 and the change rate of the oil return temperature is greater than a set value D1, indicating that the bearing has the problem of endangering the equipment safety, and automatically closing the bearing by a control device at the moment so as to ensure the equipment safety.

Specifically, for a high-speed multistage centrifugal compressor which is only provided with a first temperature monitoring device, namely a temperature measuring probe embedded in a bearing, when the high-speed multistage centrifugal compressor is stopped due to failure of the temperature measuring probe, a second temperature monitoring device is additionally arranged on a lubricating oil return pipeline of each radial bearing of the high-speed multistage centrifugal compressor, and the oil return temperature change rate of each radial bearing are monitored through the second temperature monitoring device. The maintenance mode does not need to disassemble the high-speed multistage centrifugal compressor unit, has short maintenance time and low maintenance cost. The second temperature monitoring device is arranged at one end, close to the bearing, of the lubricating oil return pipeline, so that the influence of the change of the external temperature of the bearing on the accuracy of the measuring result of the second temperature monitoring device is avoided.

Example four

The embodiment provides a bearing temperature monitoring system, including first temperature monitoring device and second temperature monitoring device to its mode of setting and effect are the same with in the third embodiment, and the difference of this embodiment with the third embodiment lies in, the second temperature monitoring device in this embodiment can also monitor the rate of change of bearing temperature, the bearing temperature monitoring system that this embodiment provided still includes controlling means, and data transmission that first temperature monitoring device and second temperature monitoring device will measure is to controlling means, and controlling means can close the bearing.

Optionally, the bearing temperature monitoring system provided by this embodiment further includes an alarm device, which is electrically connected to the control device, and the control device can control the alarm device to turn on.

Optionally, the bearing temperature monitoring system provided by this embodiment further includes an alarm shutdown device electrically connected to the alarm device, and the alarm shutdown device is capable of shutting down the alarm device.

The method for monitoring the bearing by using the bearing temperature monitoring system provided in this embodiment is the same as the bearing temperature monitoring method provided in the second embodiment, and details are not repeated here.

When the bearing temperature monitoring system provided in this embodiment is used to monitor the temperature of the bearing, the specific monitoring method is the same as the bearing temperature monitoring method provided in the second embodiment, and details are not repeated here.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.