阅读说明：本技术 一种带有自诊断预防故障发生的压缩机 (Compressor with self-diagnosis fault prevention function ) 是由 李东涛 刘权 于瑞轩 袁耀刚 陈景爱 眭敏 于 2021-10-22 设计创作，主要内容包括：本发明涉及一种用于检测轴承运行状态的传感器,以及设有这种传感器的压缩机、空调器和压缩机轴承监控系统,所述传感器为声发射传感器,所述声发射传感器用于设在所述压缩机壳体的油孔上,以直接与所述压缩机的轴承润滑油接触,所述传感器设有信号接收器和信号发射器,所述信号接收器用于采集润滑油传递的压缩机轴承运行状态信号,所述信号发射器用于将所述信号接收器采集的压缩机轴承运行状态信号发射出去,利用声波在液体中传播的原理,以润滑油为传递介质,信号接收器实时采集润滑油传递的压缩机轴承运行状态信号,信号发射器将所采集的信号发射出去,从而识别一些早期的滑动轴承的失效故障,进行及时的保养维修,避免导致重大损失。(The invention relates to a sensor for detecting the operating state of a bearing carrier, and a compressor, an air conditioner and a compressor bearing monitoring system which are provided with the sensor, wherein the sensor is an acoustic emission sensor which is arranged on an oil hole of a shell of the compressor and is directly contacted with bearing lubricating oil of the compressor, the sensor is provided with a signal receiver and a signal transmitter, the signal receiver is used for collecting compressor bearing operating state signals transmitted by the lubricating oil, the signal transmitter is used for transmitting the compressor bearing operating state signals collected by the signal receiver, the lubricating oil is used as a transmission medium by utilizing the principle that sound waves are transmitted in liquid, the signal receiver collects compressor bearing operating state signals transmitted by the lubricating oil in real time, and the signal transmitter transmits the collected signals, therefore, failure faults of the sliding bearings in early stages are identified, timely maintenance and repair are carried out, and the serious loss is avoided.)

1. A sensor for monitoring compressor bearing failure, characterized by: the sensor is an acoustic emission sensor;

the acoustic emission sensor is arranged on an oil hole of the compressor shell and is directly contacted with bearing lubricating oil of the compressor;

the sensor is equipped with signal receiver and signal transmitter, signal receiver is used for gathering the compressor bearing running state signal of lubricating oil transmission, signal transmitter is used for with the compressor bearing running state signal transmission of signal receiver collection.

2. A sensor for monitoring compressor bearing failure according to claim 1, wherein: the acoustic emission sensor comprises a shell, wherein an external thread is formed on the peripheral surface of the shell, and the acoustic emission sensor is screwed on an oil hole of the compressor shell through the external thread of the shell.

3. A sensor for monitoring compressor bearing failure according to claim 2, wherein: the shell comprises a first shell part and a second shell part, a communicated cavity is formed inside the first shell part and the second shell part, an opening is formed in the bottom of the first shell part of the cavity and used for enabling the acoustic emission sensor to be in contact with bearing lubricating oil of the compressor, the signal receiver and the signal transmitter are arranged in the cavity, the signal receiver is arranged close to the opening side, the signal transmitter is arranged on one side, away from the opening, of the signal receiver, the signal transmitter is provided with two antennas, and the antennas extend into the cavity of the second shell part from the cavity of the first shell part; the external thread is arranged on the outer peripheral surface of the first shell part.

4. A sensor for monitoring compressor bearing failure according to claim 3, wherein: the antenna and the metal shell are abutted together or welded together.

5. A sensor for monitoring compressor bearing failure according to claim 3, wherein: the outer peripheral surface of the second housing portion is prism-shaped.

6. A sensor for monitoring compressor bearing failure according to claim 3, wherein: the compressor is characterized in that a protective film used for protecting the signal receiver is arranged in the first shell portion, the protective film is arranged at an opening of the first shell portion, one side of the protective film is in contact with lubricating oil of an inner bearing of the compressor, and the other side of the protective film is attached to the signal receiver.

7. A sensor for monitoring compressor bearing failure according to claim 3, wherein: the first shell part is internally provided with a back lining for preventing static electricity, and the back lining is attached to the signal emitter.

8. A compressor provided with a sensor according to any one of claims 1 to 7, characterized in that: the compressor comprises a compressor shell, wherein an oil hole is formed in the compressor shell, the oil hole is communicated with oil of an oil hole of an inner bearing of the compressor shell, the sensor is arranged in the oil hole of the compressor shell, and the sensor is in direct contact with lubricating oil of the inner bearing of the compressor shell.

9. The compressor of claim 8, wherein: the inner wall of the oil hole is provided with an internal thread matched with the external thread on the peripheral surface of the sensor, and the sensor is arranged on the oil hole through a thread.

10. The compressor of claim 9, wherein: the compressor is a centrifugal compressor, and the bearing is a sliding bearing.

11. A compressor bearing monitoring system characterized by: the monitoring system comprises a sensor, a receiving module, a storage module and an analysis module;

the sensor is the sensor of any one of claims 1-7;

the storage module is used for storing the standard signal;

the receiving module is used for receiving the bearing running state information transmitted by the sensor in real time;

and the analysis module compares the bearing running state information received by the receiving module in real time with the standard signal to judge the running health condition of the bearing.

12. An air conditioner, characterized in that: the air conditioner comprising a compressor according to any one of claims 8-10 or a monitoring system according to claim 11.

Technical Field

The present invention relates to a sensor for detecting the state of operation of a bearing carrier, and to a compressor, an air conditioner and a compressor bearing monitoring system provided with such a sensor.

Background

The failure reasons of a large compressor, particularly a refrigerating centrifuge unit, belong to the problems of oil circuit blockage or poor oil return and the like for more than 80 percent of the operation of a lubricating oil circuit, so that parts are seriously abraded, wherein the friction of a sliding bearing or the entry of metal foreign matters into a moving part causes the operation failure of the bearing, the time is long, the failure is difficult to find in the early stage, the slight friction at the beginning cannot be judged through the current and the external noise of the operation until the damage is serious, and the failure can not be found unless the operation condition of the bearing is checked after the bearing is disassembled. Such an operation is relatively costly in the manufacturing test phase, and sometimes some bearing wear is found to be scrapped after the test is performed and the unit is disassembled. The invention is especially provided for monitoring the running condition of the sliding bearing, particularly how to judge the health condition of a running unit and how to realize big data analysis.

Disclosure of Invention

In view of the disadvantages of the prior art, the present invention provides a sensor for monitoring a bearing failure of a compressor, and a compressor, a bearing monitoring system of a compressor, and an air conditioner with self-diagnosis for preventing the occurrence of a failure by providing such a sensor. The invention utilizes the principle that sound waves are propagated in liquid, takes lubricating oil as a transmission medium, receives a bearing sound signal in real time through an acoustic emission sensor, wirelessly transmits the signal to an external monitoring system, compares the signal with a standard signal to judge the running health condition of the bearing, thereby realizing remote monitoring, identifying failure faults of some early sliding bearings, carrying out timely maintenance and repair, avoiding causing heavy loss, and solving the problems that the real-time running signal is difficult to acquire when a compressor runs and the mechanical wear fault of the compressor runs is difficult to prevent in advance.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a sensor for monitoring compressor bearing trouble, the sensor is acoustic emission sensor, acoustic emission sensor is used for establishing on the oilhole of compressor housing to direct with the bearing lubricating oil contact of compressor, the sensor is equipped with signal receiver and signal transmitter, signal receiver is used for gathering the compressor bearing running state signal of lubricating oil transmission, signal transmitter be used for with the compressor bearing running state signal transmission of signal receiver collection.

The acoustic emission sensor comprises a shell, wherein an external thread is formed on the outer peripheral surface of the shell, and the acoustic emission sensor is screwed on an oil hole of the compressor shell through the external thread of the shell.

The above scheme is further optional, the housing includes a first housing portion and a second housing portion, a communicated cavity is formed inside the first housing portion and the second housing portion, an opening is formed in the bottom of the first housing portion of the cavity, the opening is used for the acoustic emission sensor to contact with bearing lubricating oil of the compressor, the signal receiver and the signal transmitter are arranged in the cavity, wherein the signal receiver is arranged close to the opening side, the signal transmitter is arranged on one side, away from the opening, of the signal receiver, the signal transmitter is provided with two antennas, and the antennas extend from the cavity of the first housing portion into the cavity of the second housing portion; the external thread is arranged on the outer peripheral surface of the first shell part.

The above solution is further optional, and the antenna and the metal shell are abutted together or welded together.

In a further optional aspect of the foregoing, an outer circumferential surface of the second housing portion is prism-shaped.

Above-mentioned scheme is further optional, be equipped with the protection film that is used for protecting signal receiver in the first casing portion, the protection film sets up the opening part at first casing portion, one side and the compressor inner bearing lubricating oil contact of protection film, the opposite side is laminated with signal receiver mutually.

In a further optional aspect of the foregoing, a backing for preventing static electricity is disposed in the first housing portion, and the backing is attached to the signal emitter.

The invention also relates to a compressor provided with the sensor, which comprises a compressor shell, wherein the compressor shell is provided with an oil hole, the oil hole is in oil communication with the oil hole of the bearing in the compressor shell, the sensor is arranged in the oil hole of the compressor shell, and the sensor is in direct contact with the lubricating oil of the bearing in the compressor shell.

According to the scheme, the inner wall of the oil hole is provided with an internal thread matched with the external thread on the outer peripheral surface of the sensor, and the sensor is arranged on the oil hole through threads.

The invention also relates to a compressor bearing monitoring system, which comprises a sensor, a receiving module, a storage module and an analysis module; the sensor is any one of the sensors; the storage module is used for storing the standard signal; the receiving module is used for receiving the bearing running state information transmitted by the sensor in real time; and the analysis module compares the bearing running state information received by the receiving module in real time with the standard signal to judge the running health condition of the bearing.

The invention also relates to an air conditioner, and the air conditioner compressor or the monitoring system.

Compared with the prior art, the invention provides a sensor for monitoring the fault of a bearing of a compressor, the compressor with the function of self-diagnosis and fault prevention, a bearing monitoring system of the compressor and an air conditioner, which have the following advantages that:

1. according to the sensor for monitoring the faults of the compressor bearing, the acoustic emission sensor is arranged at the oil hole of the shell of the compressor, the sensor can be directly contacted with bearing lubricating oil of the compressor, so that the piezoelectric element is directly contacted with the lubricating oil in the shell, the lubricating oil is used as a transmission medium by utilizing the principle that sound waves are transmitted in liquid, the signal receiver collects the running state signals of the compressor bearing transmitted by the lubricating oil in real time, and the signal transmitter transmits the collected running state signals of the compressor bearing out, so that the real-time running signals of the compressor during running can be collected conveniently, and whether the compressor is abnormal or not can be judged conveniently;

2. according to the sensor for monitoring the fault of the compressor bearing, the outer peripheral surface of the shell is provided with the external thread, so that the sensor can be conveniently arranged on the oil hole of the shell of the compressor, the oil blocking function can be realized on one hand, the sensor can be directly contacted with bearing lubricating oil of the compressor on the other hand, the lubricating oil is used as a transmission medium, and the running state signal of the compressor bearing transmitted by the lubricating oil is collected in real time through the signal receiver;

3. according to the compressor with the function of self-diagnosis fault prevention, the external monitoring system receives and analyzes the bearing running state signal transmitted by the sensor in real time, and the running state signal is compared with the standard signal to judge the running health condition of the bearing, so that remote monitoring is realized, and the mechanical wear fault of the running of the compressor is prevented in advance.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic elevational view of an embodiment of a compressor with self-diagnostic fault prevention according to the present invention;

FIG. 2 is a schematic view of a sensor mounting structure of an embodiment of the compressor with self-diagnosis for preventing the occurrence of a fault according to the present invention;

FIG. 3 is a schematic diagram of a sensor configuration for an embodiment of the compressor with self-diagnostic fault prevention of the present invention;

FIG. 4 is a top view of the sensors of an embodiment of the compressor with self-diagnostic protection against failure occurrence in accordance with the present invention;

fig. 5 is a front cross-sectional view of a sensor of an embodiment of the compressor with self-diagnosis for preventing the occurrence of a fault according to the present invention.

In the figure:

1. a sensor;

11. a housing; 111. an external thread;

12. a signal receiver;

13. a signal transmitter; 131. an antenna;

14. a protective film;

15. a backing;

2. a compressor;

21. a compressor housing;

211. an oil hole;

2111. an internal thread.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-5, a sensor for monitoring a compressor bearing fault includes a sensor 1, which is an acoustic emission sensor, the acoustic emission sensor is disposed on an oil hole of a compressor housing to directly contact with bearing lubricant of a compressor 2, the sensor 1 is provided with a signal receiver 12 and a signal transmitter 13, the signal receiver 12 is used for collecting a compressor bearing operating state signal transmitted by the lubricant, and the signal transmitter 13 is used for transmitting the compressor shaft operating state signal collected by the signal receiver.

The compressor inner bearing is slide bearing, when slide bearing operation, utilize the principle of sound wave propagation in liquid, use lubricating oil as the transmission medium, all signals that appear all can transmit through lubricating oil, signal receiver 12 is direct to contact with compressor 2's bearing lubricating oil, thereby can gather the compressor bearing running state signal of lubricating oil transmission in real time, signal transmitter 13 is gone out with the compressor bearing running state signal transmission of gathering, thereby be convenient for gather the real-time running signal of compressor operation, be convenient for judge whether the compressor is unusual.

The signal emitter 13 is arranged in the sensor, the compressor bearing running state signal collected by the signal receiver 12 is transmitted in a wireless transmission mode, the signal emitter 13 is not arranged, the signal receiver 12 is connected with an external monitoring system through an electrode lead and a BNC connector and is directly connected with a data line, the compressor bearing running state signal collected by the signal receiver 12 is transmitted in a wired transmission mode, the monitoring cost is higher through wired transmission signals, and the signal emitter 13 is preferably used for transmitting the signal in a wireless mode.

Referring to fig. 5, the acoustic emission sensor includes a housing 11, an external thread 111 is formed on an outer circumferential surface of the housing 11, and the acoustic emission sensor is screwed to an oil hole of a compressor housing through the external thread 111 of the housing 11.

The shell 11 comprises a first shell part and a second shell part, a communicated cavity is formed inside the first shell part and the second shell part, an opening is formed in the bottom of the first shell part of the cavity, the opening is used for enabling the acoustic emission sensor to be in contact with bearing lubricating oil of the compressor, the signal receiver and the signal transmitter are arranged in the cavity, the signal receiver 12 is arranged close to the opening side, the signal transmitter 13 is arranged on one side, far away from the opening, of the signal receiver 12, the signal transmitter 13 is provided with two antennas 131, and the antennas 131 extend into the cavity of the second shell part from the cavity of the first shell part; the external thread is arranged on the outer peripheral surface of the first shell part.

The antenna 131 is abutted against or welded to the metal case, thereby facilitating signal transmission.

The outer peripheral surface of the second shell part is prism-shaped, so that the sensor can be conveniently rotated and mounted and dismounted.

A protective shell used for protecting the signal receiver is arranged in the first shell part; or a protective film 14, wherein the protective film 14 is arranged at the opening of the first shell part, one side of the protective film 14 is contacted with the lubricating oil of the bearing in the compressor, and the other side is attached to the signal receiver 12.

The first housing portion is provided with a backing 15 for preventing static electricity, the backing 15 is attached to the signal emitter 13, and a wire connected to the signal emitter 13 and the antenna 131 can penetrate through the backing 15.

The sensor provided by the invention monitors and collects abnormal signals emitted from the sliding bearing of the refrigerating centrifuge in a non-contact mode. Because the compressor is mostly the hermetic compressor under its use scene, the bearing frame is unsettled usually to built-in unable direct monitoring signal. The principle that sound waves are transmitted in liquid is ingeniously utilized, lubricating oil directly contacts with a running bearing, and signals are transmitted by taking the lubricating oil as a transmission medium. The main reason is that the injection of lubricating oil relies on the lubricated oil hole of oilhole and bearing to come the butt joint realization, because the reason of machining, the oilhole has the trompil in centrifuge shell department. The acoustic emission sensor of the present invention can be designed to replace the original plug. Therefore, the receiver of the acoustic emission can be directly contacted with the lubricating oil, and clear signals can be directly transmitted. The outside of a standard acoustic emission sensor is not provided with threads, and the threads are increased and the protective copper shell of the probe is also increased through modification. Therefore, the sensor can not only have the function of a plug, but also can be directly contacted with lubricating oil to realize the receiving and transmitting of signals.

Furthermore, conventional acoustic emission sensors are typically connected directly to a front-end amplifier via a data line, and such sensors may transmit acoustic waves via the data line to a host for direct processing. However, the improved sensor transmits signals to the remote module of the electric cabinet by adding the wireless transmitting module, the module transmits the signals to a monitoring system of a company through a big data platform, and the monitoring system can directly judge whether the operation of the compressor is healthy or not after the monitoring system processes the signals.

Example two

Referring to fig. 1-2, a compressor, preferably a centrifugal compressor, is provided with the above-described sensor. The compressor 2 comprises a compressor shell 21, the compressor shell 21 is provided with an oil hole 211, the oil hole 211 is communicated with oil of an oil hole of a bearing in the compressor shell, the sensor 1 is arranged in the oil hole 211 of the compressor shell, and the sensor 1 is in direct contact with lubricating oil of the bearing in the compressor shell.

The inner wall of the oil hole 211 is provided with internal threads 2111 matched with the external threads 111 on the outer peripheral surface of the sensor 1, and the sensor 1 is arranged on the oil hole 211 through threads.

The working principle is as follows: when in use, the sensor 1 is assembled in the oil hole 211 of the compressor shell 21 through the external thread 11, the signal receiver 12 is directly contacted with lubricating oil of the compressor shell 21, when the compressor 2 works, the sliding bearing operates, and by utilizing the principle that sound waves propagate in liquid, lubricating oil is used as a transmission medium, all the signals are transmitted through the lubricating oil, the signal receiver 12 collects the running state signals of the compressor bearing in real time, and transmits the collected compressor bearing running state signal to an external monitoring system through a signal transmitter 13, the monitoring system receives and stores the compressor bearing running state signal, and compares the compressor bearing running state signal with a standard signal to judge the running health condition of the bearing, therefore, remote monitoring is realized, mechanical abrasion faults of the operation of the compressor are prevented in advance, timely maintenance is carried out, and the serious loss is avoided.

The invention can solve the following problems of the compressor, in particular to a large-scale centrifugal compressor, through the arrangement and the improvement of the acoustic wave sensor:

1. the problem of the collection of the real-time running signal of the centrifugal compressor for refrigeration is solved.

2. The problem of mechanical wear trouble of centrifugal compressor operation for the refrigeration prevent in advance is solved.

3. The problem of real-time diagnosis of the remote operation health condition of the unit after sale is solved.

4. The method provides the basis and standard for troubleshooting the maintenance of the centrifugal compressor for refrigeration.

The invention solves the problem of failure prevention of the sliding bearing caused by friction, improper assembly and long-term operation of the sliding bearing of the centrifugal machine for refrigeration.

EXAMPLE III

The embodiment provides a compressor bearing monitoring system, which comprises a sensor, a receiving module, a storage module and an analysis module;

the sensor is the sensor 1, a signal receiver 12 in the sensor 1 collects compressor bearing running state signals transmitted by lubricating oil, and a signal emitter 13 emits the compressor bearing running state signals collected by the signal receiver 12; the receiving module is used for receiving the bearing running state information transmitted by the sensor 1 in real time; the storage module is used for storing and updating the running state information of the bearing in real time to form a dynamically updated sample database, and the analysis module is used for judging the running health condition of the bearing by combining the running state information of the bearing received by the receiving module in real time and the sample information of the sample database; the storage module is also internally stored with standard signals and various abnormal signals of the operation of the compressor, and the analysis module compares the received signals with the stored signals for analysis, thereby determining whether the operation of the compressor is normal or not and identifying some early failure faults of the sliding bearing.

When the bearing is in operation, all signals that occur are transmitted to the receiver via the lubricant. The receiver transmits the signal to the equipment host for processing, separates out an abnormal signal, and judges the running health condition of the sliding bearing by comparing with a standard signal. The detection module is arranged in the control cabinet, signals are transmitted to a monitoring system of a machine set of a company through the transmitter after the signals are collected, so that monitored data can be continuously transmitted to a big data monitoring platform of the company, failure faults of some early sliding bearings are identified according to processing signals of the acoustic emission instrument, timely maintenance is carried out, and great loss is avoided.

The sound wave signals of the running of the compressor are remotely acquired and then sent to the data platform, and are transmitted back to a monitoring system of a company for data analysis and judgment, so that serious abrasion faults of the unit are prevented. Through the mode, the remote health diagnosis of the large-scale compressor, particularly a refrigeration centrifugal compressor unit is solved, and the unit is prevented from generating serious faults in advance.

It should be noted that: in the manufacturing process, the compressor bearing monitoring system can also directly use the standard acoustic emission sensor instead of the special acoustic emission sensor provided by the invention, arrange the accessory of the oil hole and directly connect the accessory with the data line. And after the detection signal is transmitted to the acoustic emission host, analyzing and processing are carried out to obtain a detection conclusion. However, this method is mainly suitable for manufacturing ring sections, and once the unit is shipped and installed, the monitoring is costly and the unit state cannot be detected in real time.

Example four

The embodiment provides an air conditioner, and the air conditioner includes foretell compressor 2 or foretell monitored control system, through monitored control system to compressor bearing running state real-time supervision, prevents the mechanical wear trouble of compressor operation in advance, carries out timely maintenance, avoids leading to the great loss.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.