Eddy current monitoring system for desorption gas compressor

Abstract

The utility model relates to the technical field of compressor eddy current monitoring, and discloses a desorption gas compressor eddy current monitoring system which comprises a test board, a caliper support and a sensor support are arranged on the left side and the right side of the top of the test board respectively, a clamping groove is formed in the center of the top of the caliper support, and a caliper is installed in the clamping groove. One end, close to the sensor support, of the caliper is connected with a steel sheet, a through hole is formed in the center of the top of the sensor support, an eddy current sensor is connected in the through hole, and the center of the steel sheet right faces the eddy current sensor. The eddy current sensor is detached from the compressor and then installed on the sensor support, a caliper is used for measurement, the calibration precision of the eddy current sensor is high, various types of sensor probes can be calibrated, and the steel sheet is used for simulating a coupler.

Description

Technical Field

[0001] This utility model relates to the field of compressor eddy current monitoring technology, specifically to an eddy current monitoring system for an analytical gas compressor. Background Technology

[0002] Shaft system monitoring instruments are commonly used in the petrochemical industry. They consist of sensor probes, extension cables, preamplifiers, signal lines, and monitoring systems. Different sensor probes are used to detect displacement, vibration, and speed values ​​of the equipment. Eddy current sensor probes are commonly used in large transmission equipment such as compressors, steam turbines, and dry presses to continuously monitor the safe operation of the equipment, ensuring its safe operation and reducing abnormal shutdowns and other malfunctions. When the bearing parameters of the equipment exceed or fall below set values, an alarm signal is issued on the system. If the exceedance is significant, an interlock shutdown will be initiated to ensure the safe, stable, and long-term operation of the equipment.

[0003] The quality of the eddy current sensor probe directly affects the entire detection system. When the unit equipment is shut down due to a fault, the eddy current sensor probe needs to be verified and checked. Since there is no external monitoring system, the eddy current sensor probe is usually not disassembled during the inspection. It is necessary for staff to lean into the unit to adjust the probe position, and then another staff member to observe and record the voltage value to judge the quality of the probe. This work is inefficient and the unit is dirty and oily with a pungent smell. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an eddy current monitoring system for an analytical gas compressor.

[0005] To achieve the above objectives, the technical solution of this utility model is: an eddy current monitoring system for an analytical gas compressor, comprising a test bench, wherein a caliper bracket and a sensor bracket are respectively provided on the left and right sides of the top of the test bench, a slot is provided at the top center of the caliper bracket, a caliper is installed in the slot, a steel plate is connected to one end of the caliper near the sensor bracket, a through hole is provided at the top center of the sensor bracket, an eddy current sensor is connected in the through hole, and the center of the steel plate is directly opposite the eddy current sensor.

[0006] Furthermore, it also includes a monitoring controller, a preamplifier, and a multimeter, with the extension cable of the eddy current sensor connected to the preamplifier, and the preamplifier connected to the monitoring controller and the multimeter respectively via signal lines.

[0007] Furthermore, the caliper includes a main scale and a secondary scale, the secondary scale being slidably fitted onto the outer wall of the main scale, and the secondary scale passing through a groove.

[0008] Furthermore, the top of the caliper bracket is threaded with a first fixing screw, which extends into the caliper groove and abuts against the auxiliary scale.

[0009] Furthermore, a second fixing screw is threaded onto the auxiliary scale, the second fixing screw passing through the auxiliary scale and abutting against the main scale.

[0010] Furthermore, a fixing ring is fitted onto the outer wall of the eddy current sensor, and the fixing ring is threadedly connected to the sensor bracket.

[0011] Furthermore, adjusting nuts are provided at the four corners of the bottom of the test platform.

[0012] The beneficial effects of this utility model are:

[0013] (1) After removing the eddy current sensor from the compressor, install it on the sensor bracket of this utility model and measure it with calipers. The eddy current sensor has high calibration accuracy and can also calibrate various types of sensor probes. The steel sheet is used to simulate the coupling.

[0014] (2) The present invention verifies the parameters of the eddy current sensor, including vibration probe, displacement probe, speed probe, etc.

[0015] (3) If the test platform is not level, the level of the test platform can be adjusted by fine-tuning the adjusting nut under the test platform, so as to measure the probe more accurately.

[0016] (4) This utility model can be tested away from the production site and can be moved to the required location to ensure personnel safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation structure of an eddy current sensor in a desorption gas compressor in the prior art;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model;

[0019] Figure 3 This is a partially enlarged structural schematic diagram of the present invention;

[0020] Figure 4 This is a screenshot of the linear monitoring controller for testing this utility model. A represents non-linearity and is considered non-compliant, while B represents linearity and is considered compliant.

[0021] In the diagram: 1. Compressor; 11. Coupling; 12. Motor; 2. Eddy current sensor; 21. Extension cable; 22. Preamplifier; 23. Monitoring controller; 24. Multimeter; 25. Signal line; 3. Test bench; 31. Sensor bracket; 32. Fixing ring; 33. Caliper bracket; 34. First fixing screw; 35. Caliper; 351. Main scale; 352. Secondary scale; 353. Second fixing screw; 36. Steel sheet; 37. Adjusting nut. Detailed Implementation

[0022] Example:

[0023] like Figure 2 and Figure 3 As shown, an eddy current monitoring system for an analytical gas compressor includes a test bench 3, a monitoring controller 23, a preamplifier 22, and a multimeter 24. The test bench 3 has a caliper bracket 33 and a sensor bracket 31 on its top left and right sides, respectively. The caliper bracket 33 has a slot at its top center, in which a caliper 35 is installed. A steel plate 36 is connected to one end of the caliper 35 near the sensor bracket 31. The sensor bracket 31 has a through hole at its top center, in which an eddy current sensor 2 is connected. The center of the steel plate 36 is directly opposite the eddy current sensor 2.

[0024] The extension cable 21 of the eddy current sensor 2 is connected to the preamplifier 22, and the preamplifier 22 is connected to the monitoring controller 23 and the multimeter 24 respectively via the signal line 25.

[0025] The caliper 35 includes a main scale 351 and a secondary scale 352. The secondary scale 352 is slidably fitted onto the outer wall of the main scale 351 and passes through a groove. A first fixing screw 34 is threadedly connected to the top of the caliper bracket 33. The first fixing screw 34 extends into the groove and abuts against the secondary scale 352. A second fixing screw 353 is threadedly connected to the secondary scale 352. The second fixing screw 353 passes through the secondary scale 352 and abuts against the main scale 351.

[0026] In this preferred embodiment, the outer wall of the eddy current sensor 2 is fitted with a fixing ring 32, and the fixing ring 32 is threadedly connected to the sensor bracket 31.

[0027] In this preferred embodiment, adjusting nuts 37 are provided at the four corners of the bottom of the test bench 3.

[0028] The calibration method for eddy current sensors is as follows:

[0029] 1) such as Figure 1 As shown, the eddy current sensor 2 is removed from the compressor 1, and the extension cable 21 on the eddy current sensor 2 is connected to the input terminal of the preamplifier 22. The output terminal is connected to the monitoring controller 23 and the multimeter 24 respectively using the signal line 25.

[0030] 2) Adjust the caliper 35 on the test bench 3, tighten the auxiliary scale 352 with the first fixing screw 34, insert the eddy current sensor 2 into the through hole of the sensor bracket 31, so that the gap between the steel plate 36 and the eddy current sensor 2 is about 2mm. The steel plate 36 is used to simulate the coupling. Observe the output of the voltmeter display ±0.2V, and tighten the eddy current sensor 2 with the fixing ring 32.

[0031] 3) Adjust the current scale of caliper 35 by 2mm, decreasing the gap by 0.25mm each time, until a gap of 0.75mm is reached. Record the output voltage at each point (if the gap exceeds 2mm or is 0mm, it indicates that the eddy current sensor 2 is damaged, cannot be displayed in the monitoring controller 23, and the trend cannot be recorded). Observe the fluctuation of each voltage value. No large voltage fluctuation indicates that the eddy current sensor 2 is qualified and the trend can be queried in the monitoring controller 23. Figure 4 The curve style of B in the middle is qualified and can be installed and used. Figure 4 The curve style of A in the middle is unqualified.

[0032] 4) If the test platform 3 is not level, the level of the test platform 3 can be adjusted by fine-tuning the adjusting nut 37 under the test platform 3, so as to measure the eddy current sensor 2 more accurately.

[0033] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

[0034] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. An eddy current monitoring system for an analytical gas compressor, characterized in that: The test platform includes a caliper bracket and a sensor bracket on the top left and right sides, respectively. The caliper bracket has a slot at the top center, in which a caliper is installed. A steel plate is connected to the end of the caliper near the sensor bracket. The sensor bracket has a through hole at the top center, in which an eddy current sensor is connected. The center of the steel plate is directly opposite the eddy current sensor.

2. The eddy current monitoring system for the desorption gas compressor according to claim 1, characterized in that: It also includes a monitoring controller, a preamplifier, and a multimeter. The extension cable of the eddy current sensor is connected to the preamplifier, and the preamplifier is connected to the monitoring controller and the multimeter via signal lines.

3. The eddy current monitoring system for the desorbed gas compressor according to claim 1, characterized in that: The caliper includes a main scale and a secondary scale, the secondary scale being slidably fitted onto the outer wall of the main scale, and the secondary scale passing through a groove.

4. The eddy current monitoring system for the desorbed gas compressor according to claim 3, characterized in that: The top of the caliper bracket is threaded with a first fixing screw, which extends into the caliper groove and abuts against the auxiliary scale.

5. The eddy current monitoring system for the desorption gas compressor according to claim 4, characterized in that: The secondary scale is threaded with a second fixing screw, which passes through the secondary scale and abuts against the main scale.

6. The eddy current monitoring system for the desorbed gas compressor according to claim 4, characterized in that: The outer wall of the eddy current sensor is fitted with a fixing ring, and the fixing ring is threadedly connected to the sensor bracket.

7. The eddy current monitoring system for the desorbed gas compressor according to claim 4, characterized in that: Adjusting nuts are provided at the four corners of the bottom of the test bench.

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