Dry gas seal operation state detection system

Abstract

The utility model discloses a dry gas seal operation state detection system, which comprises an integrated sensor assembly, a signal collector and a central processor, and is characterized in that the integrated sensor assembly comprises a pressure sensor, a temperature sensor and an acoustic emission sensor; the output end of the pressure sensor and the output end of the temperature sensor are both in communication connection with the signal collector, the output end of the acoustic emission sensor is connected with a signal amplifier, the output end of the signal amplifier is connected with the signal collector, and the signal collector is connected with the central processing unit. By timely monitoring different sealing operation parameters and intelligently diagnosing the real sealing operation state, whether the sealing pair is in contact wear or not can be judged, and the service life of the sealing pair can be predicted.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a dry gas sealing operation state detection system. Background Art

[0002] Dry gas seals are widely used in the rotating equipment transportation industry. Dry gas seals are usually integrated container double-end faces, consisting of two sets of sealing pairs with dynamic pressure grooves engraved on the end faces. After the pressurized sealing gas is passed between the two sets of sealing pairs, the sealing gas enters between the sealing end faces. Driven by the rotating dynamic pressure grooves on the end faces of the sealing pairs, the sealing gas generates dynamic pressure, causing the sealing end faces to open microscopic channels, allowing the sealing pairs to operate non-contact. At the same time, the pressurized sealing gas flows to one side of the medium in the microscopic channels, playing the role of isolating the medium, thereby achieving "zero leakage" of the medium. In this process, the non-contact operating dry gas seal pair only generates a small torque and has a long service life.

[0003] However, the actual application of dry gas seals is not as perfect as the design theory. During actual installation and use, the shape and position tolerances, dimensional tolerances, assembly errors, equipment vibrations, defects in the materials used in the seals themselves, etc., will cause the seals to not perform as well as the theoretical design values ​​during use. There will be phenomena such as seal contact wear outside the design range, excessive leakage, and reduced service life, which will cause unpredictable losses to users.

[0004] In the market, the sealing gas pressure is usually monitored. When the sealing leakage exceeds the standard, the central control will judge the sealing status according to the monitored pressure signal and the set pressure alarm value. However, the change in pressure does not completely represent that the sealing leakage exceeds the standard. When the pressure source pressure changes or the sealing gas pipeline is abnormal, many factors may cause the sealing gas pressure to change. Whether the seal can continue to be used still needs to be determined on site by professional technicians. Disassembling a seal that can still be used after being judged as invalid or judging a seal that cannot be used as being usable will cause losses. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing monitoring of dry gas seals still requires on-site judgment by technicians, and the seals that can still be used are judged to be invalid and then disassembled, or the seals that cannot be used are judged to be usable, which will cause losses. The purpose is to provide a dry gas seal operation status detection system.

[0006] The utility model is realized by the following technical solutions:

[0007] A dry gas seal operation status detection system includes an integrated sensor component, a signal collector and a central processing unit. The integrated sensor component includes a pressure sensor, a temperature sensor and an acoustic emission sensor. The output ends of the pressure sensor and the temperature sensor are both communicatively connected to the signal collector. The output end of the acoustic emission sensor is connected to a signal amplifier. The output end of the signal amplifier is connected to the signal collector. The signal collector is connected to the central processing unit.

[0008] As a possible design, the integrated sensor assembly further includes a shell, in which the pressure sensor, the temperature sensor and the acoustic emission sensor are arranged, and detection ends of the pressure sensor, the temperature sensor and the acoustic emission sensor extend out of the shell.

[0009] As a possible design, a first nut is provided in the middle of the housing.

[0010] As a possible design, a second nut is provided at one end of the housing away from the detection end.

[0011] As a possible design, both the first nut and the second nut are threadedly connected to the housing.

[0012] As a possible design, the shell is formed by connecting a first cylinder and a second cylinder.

[0013] As a possible design, the first cylinder and the second cylinder are threadedly connected.

[0014] As a possible design, an external thread is provided on the outer surface of the first cylinder.

[0015] As a possible design, both the first nut and the second nut are hexagonal nuts.

[0016] As a possible design, the connecting end of the first cylinder and the second cylinder is tapered.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] By timely monitoring different seal operating parameters and being able to intelligently diagnose the actual operating status of the seal, it is possible to determine whether the seal pair is in contact with wear and also to predict the remaining service life of the seal pair. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0020] Figure 1It is a schematic diagram of a dry gas seal operation status detection system in an embodiment of the utility model;

[0021] Figure 2 It is a conventional schematic diagram of a container-type double-end dry gas seal in an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the assembly of a containerized double-end dry gas seal and a dry gas seal operation status detection system in an embodiment of the utility model.

[0023] Marks and corresponding parts names in the attached drawings:

[0024] 1-integrated sensor assembly, 2-signal line, 3-signal amplifier, 4-signal collector, 5-central processing unit; 6-assembled double-end dry gas seal, 601-end cover, 602-first O-ring, 603-medium side friction pair, 604-sleeve, 605-second O-ring, 606-third O-ring, 607-pressure cover, 608-atmosphere side friction pair, 609-setting screw, 610-drive ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Because the existing dry gas seals still rely on technicians to judge whether there is a leak. Human judgment is related to the professional level of the technicians. Therefore, misjudgment may occur. A seal that can still be used is judged to be failed and disassembled, or a seal that cannot be used is judged to be usable, both of which will cause losses.

[0031] In response to the above problems, Figure 1 As shown, the utility model discloses a dry gas seal operation status detection system, including an integrated sensor assembly 1, a signal collector 4 and a central processing unit 5. The integrated sensor assembly 1 includes a pressure sensor, a temperature sensor and an acoustic emission sensor (not shown in the figure). The output ends of the pressure sensor and the temperature sensor are both communicatively connected to the signal collector 4. The output end of the acoustic emission sensor is connected to a signal amplifier 3. The output end of the signal amplifier 3 is connected to the signal collector 4. The signal collector 4 is connected to the central processing unit 5. It should be noted that the central processing unit 5 should be understood to contain a signal processing program and an output program that meet the requirements of the utility model. In addition to the processing program, the central processing unit 5 may also include a display device, such as a display screen. It should be noted that the program running in the central processing unit 5 is a prior art or can be obtained by transformation through conventional means.

[0032] Specifically, the connection among the integrated sensor component 1 , the signal collector 4 and the central processor 5 can realize mutual transmission of signals through the signal line 2 .

[0033] The integrated sensor assembly 1 can monitor the sealing gas pressure and temperature in the double-end dry gas seal and the acoustic wave signal generated during the sealing operation. The dedicated intelligent diagnostic chip arranged in the signal collector 4 can convert the collected signals into visual data and transmit them to the central processor 5. It can intelligently diagnose the sealing operation status, determine whether the sealing pair is in contact with wear, and predict the remaining service life of the sealing pair.

[0034] When the dry gas seal operation status detection system disclosed by the utility model is actually applied, a corresponding sensor connection hole needs to be opened on the corresponding dry gas seal setting, and the bottom of the sensor connection hole must be connected to the sealing area. Then the integrated sensor assembly 1 is inserted into the sensor connection hole, and the detection end of the sensor connection hole is inserted into the sealing area, thereby realizing effective monitoring of temperature, pressure and sound waves.

[0035] like Figure 1 As shown, the pressure signal and temperature signal from the pressure sensor and the temperature sensor are transmitted to the signal collector 4 through the signal line 2. The sound wave signal from the acoustic emission sensor is transmitted to the signal amplifier 3 through the signal line 2. The signal amplifier 3 amplifies the received sound wave signal for easier identification, filters the received useless sound wave signal, and transmits the processed sound wave signal to the signal collector 4.

[0036] like Figure 1 As shown, the signal collector 4 integrates and processes the collected batch signals and imports them into the central processing unit 5 set in the central control computer. The central processing unit 5 will judge and diagnose the sealing operation status according to the received timely data, and visualize the timely data and diagnosis results and display them in a prominent position on the display screen.

[0037] When there is no abnormality in the internal parts of the seal, the sealing gas source pressure is normal and the equipment is operating normally, the various waves generated inside the seal are smooth and continuous, the electrical signals transmitted by the acoustic emission sensor and the visual data generated by the terminal are also stable. When abnormal contact and friction occur between the sealing parts, the abnormal fluctuations generated will be very obvious on the computer terminal after amplification.

[0038] When there is no abnormality in the internal parts of the seal, the sealing gas source pressure is normal and the equipment operates normally, the consumption of sealing gas is stable and continuous, and the sealing gas pressure will also be stable and continuous; when the sealing gas source pressure fluctuates, the seal is damaged, or the sealing gas connecting pipeline has an abnormality, the monitored sealer pressure will fluctuate.

[0039] When there is no abnormality in the internal parts of the seal, the sealing gas source pressure is normal and the equipment is operating normally, the temperature of the sealing gas will be stable and continuous. When abnormal contact friction occurs in the internal parts of the seal or the ambient temperature changes sharply, the monitored temperature will fluctuate.

[0040] The database of the central processor 5 stores test data packets, and forms an intelligent diagnostic data module with all the data generated during the operation of the dry gas seal. For example, there are separate data models for damage to a single part inside the seal, contact friction of the seal end face, loss of elasticity of a seal spring, sudden increase or decrease in the seal gas pressure, sudden increase or decrease in the ambient temperature of the equipment, and continuous vibration of the environment in which the equipment is located. After data modeling, these data models can be imported into the database as standard judgment modules after multiple repetitive tests and successful verification with a success rate of more than 99%.

[0041] In actual application, the central processor 5 will perform big data comparison diagnosis with the data modules in the database based on the received pressure, temperature and sound wave signals, and display the comparison results in a concise and clear manner.

[0042] In summary, the dry gas seal operation status detection system disclosed in the utility model is provided with pressure monitoring, temperature monitoring and sound wave monitoring, and timely monitors the operating status of the seal through multiple parameters. The central processor 5 will perform comparative analysis based on the timely signals received, intelligently diagnose the actual operating status of the seal, and notify the user based on the comprehensive judgment results.

[0043] Example

[0044] When the dry gas seal operation status detection system disclosed in the utility model is specifically applied, the dry gas seal used is a container-type double-end dry gas seal 6, and its structure is the existing structure. Figure 2 As shown, the set screw 609 arranged on the driving ring 610 fixes the sleeve 604 of the double-end dry gas seal on the rotating shaft, and the second O-ring 605 can prevent the medium from leaking from the sleeve 604 and the rotating shaft; the cylindrical head screw connects and fixes the end cover 601 and the pressure cover 607 on the equipment cavity, the first O-ring 602 can prevent the medium from leaking from the end cover 601 and the equipment cavity, and the third O-ring 606 can prevent the sealing cavity from leaking from the end cover 601 and the pressure cover 607; the medium side friction pair 603 is arranged near the medium side in the container-type double-end dry gas seal 6, and the atmosphere side friction pair 608 is arranged near the atmosphere side in the container-type double-end dry gas seal 6. The end faces of the medium side friction pair 603 and the atmosphere side friction pair 608 are engraved with microscopic dynamic pressure grooves. When the sealing gas is passed into the seal and it is running, dynamic pressure can be generated, so that the medium side friction pair 603 and the atmosphere side friction pair 608 are both non-contact operation.

[0045] The schematic diagram of the assembly and use of the containerized double-end dry gas seal 6 and the dry gas seal operation status detection system is as follows Figure 3 shown.

[0046] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A dry gas seal operation status detection system, characterized in that: It includes an integrated sensor component, a signal collector and a central processing unit. The integrated sensor component includes a pressure sensor, a temperature sensor and an acoustic emission sensor. The output ends of the pressure sensor and the temperature sensor are both communicatively connected to the signal collector. The output end of the acoustic emission sensor is connected to a signal amplifier. The output end of the signal amplifier is connected to the signal collector. The signal collector is connected to the central processing unit.

2. The dry gas seal operation status detection system according to claim 1, characterized in that: The integrated sensor assembly further comprises a shell, in which the pressure sensor, the temperature sensor and the acoustic emission sensor are arranged, and detection ends of the pressure sensor, the temperature sensor and the acoustic emission sensor extend out of the shell.

3. The dry gas seal operation status detection system according to claim 2, characterized in that: A first nut is arranged in the middle of the shell.

4. The dry gas seal operation status detection system according to claim 3, characterized in that: A second nut is disposed at one end of the housing away from the detection end.

5. The dry gas seal operation status detection system according to claim 4, characterized in that: The first nut and the second nut are both threadedly connected to the housing.

6. The dry gas seal operation status detection system according to claim 2, characterized in that: The shell is formed by connecting a first cylinder and a second cylinder.

7. The dry gas seal operation status detection system according to claim 6, characterized in that: The first cylinder is threadedly connected with the second cylinder.

8. The dry gas seal operation status detection system according to claim 6, characterized in that: An external thread is arranged on the outer surface of the first cylinder.

9. The dry gas seal operation status detection system according to claim 4, characterized in that: The first nut and the second nut are both hexagonal nuts.

10. The dry gas seal operation status detection system according to claim 6, characterized in that: The connecting ends of the first cylinder and the second cylinder are tapered.

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