An eddy current sensor online cleaning device

Abstract

The utility model discloses an online dirt cleaning device for an eddy current sensor, comprising: a carbon brush lead-out line, a dirt cleaning carbon brush, a coiled spring, an insulating shell, a connecting bolt, and a bracket; a buckle position is arranged on one side of the insulating shell, and the coiled spring has a buckle, which is fixed to one side of the insulating shell through the buckle and the buckle position; the dirt cleaning carbon brush is placed inside the insulating shell; the carbon brush lead-out line is arranged on a side where the dirt cleaning carbon brush contacts the coiled spring of the coiled spring; the other side of the insulating shell opposite to the side where the coiled spring is fixed is fixed to the bracket; the utility model can clean the measuring surface without stopping the operation of the equipment; the coiled spring and the dirt cleaning carbon brush can be in close contact with the cleaned surface at all times through the cooperation of the coiled spring and the dirt cleaning carbon brush; the dirt cleaning carbon brush will not cause wear to the rotor, will not pollute the rotor, and will not generate electric sparks; when the cleaning device is seriously worn, it can be replaced online; and the cleaning device does not form an electrical path with the rotating equipment.

Description

Technical Field

[0001] The utility model relates to the field of pollution cleaning, in particular to an online pollution cleaning device for an eddy current sensor. Background Art

[0002] The measurement of shaft vibration is in demand in the aviation, petroleum, mining and other industries. Eddy current sensors have the advantages of good long-term working reliability, high sensitivity, strong anti-interference ability, non-contact measurement, fast response speed, and convenience for remote measurement. They can measure the distance between the measured metal conductor and the probe surface statically and dynamically, non-contactly, with high linearity and high resolution. It is currently the most widely used method for displacement and shaft vibration measurement. It is widely used in the industrial field for displacement and shaft vibration measurement of rotating equipment (such as fans, steam turbines, engines, etc.). However, because most of the measured surfaces are exposed to the outside, they are prone to rust after long-term operation, and the measured surfaces are easily contaminated by oil, dust, etc., which interferes with the measurement. At present, rotating equipment mostly uses eddy current sensors to measure shaft vibration data as interlocking protection. The measurement distortion caused by the contamination of the measured surface leads to the misoperation of the equipment interlocking from time to time, resulting in unnecessary equipment downtime losses.

[0003] The existing technology uses eddy current sensors fixed on the cover of rotating equipment. The sensor is centered on the rotor of the rotating equipment and the measurement interval is adjusted. However, the measured surface is prone to adsorb dust and rust, which cannot be handled during operation, resulting in distortion of shaft system data measurement. As the operating time increases, attachments accumulate on the shaft of the rotating equipment. If not handled in time, it will seriously interfere with the measurement of shaft system vibration data. In severe cases, it will cause corresponding interlocking protection actions, causing abnormal tripping and shutdown of the unit.

[0004] The utility model provides an online dirt cleaning device for an eddy current sensor, which is in close contact with a cleaned surface at all times without stopping the operation of the equipment, so as to clean the measuring surface. Utility Model Content

[0005] The utility model provides an eddy current sensor online cleaning device to solve one of the problems raised in the above background technology:

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An eddy current sensor online cleaning device comprises: a carbon brush lead wire, a cleaning carbon brush, a rolled spring sheet, an insulating shell, a connecting bolt, and a bracket;

[0008] A buckle position is provided on one side of the insulating shell, the coiled spring has a buckle, and the coiled spring is fixed to one side of the insulating shell through the buckle and the buckle position on the insulating shell;

[0009] The cleaning carbon brush is placed inside the insulating housing;

[0010] The carbon brush lead wire is arranged on the side where the cleaning carbon brush contacts the coil spring of the coiled spring sheet;

[0011] The other side surface of the insulating shell opposite to the side surface fixing the rolled spring piece is fixed to the bracket.

[0012] Furthermore: the insulating shell is a hollow quadrangular prism.

[0013] Furthermore: the height of the cleaning carbon brush is higher than the height of the insulating shell, and the difference is 3cm~4cm.

[0014] Furthermore: the other side of the insulating housing where the coiled spring is not fixed is provided with screw holes corresponding to the above-mentioned connecting bolts one by one.

[0015] Furthermore: the bracket includes a base and a mounting plate, and the mounting plate is mounted on the base.

[0016] Furthermore: screw holes corresponding to the connecting bolts are arranged on the mounting plate.

[0017] Furthermore: the insulating shell is made of high temperature resistant silicone rubber.

[0018] Furthermore: the support is made of aluminum silicate fiber.

[0019] The beneficial effects of the utility model are:

[0020] 1: The measuring surface can be cleaned without stopping the equipment;

[0021] 2: The combination of the rolled spring and the cleaning carbon brush can keep close contact with the surface to be cleaned at all times;

[0022] 3: The material used to clean the measuring surface will not cause wear and contamination to the rotor, and will not generate electric sparks due to long-term and rapid friction;

[0023] 4: When the cleaning device is severely worn, it can be replaced online; and the cleaning device is not connected to the rotating equipment to form an electrical path. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a three-dimensional stereogram of the utility model;

[0026] Figure 2 It is a cross-sectional schematic diagram of the utility model before the cleaning carbon brush is installed;

[0027] Figure 3This is a cross-sectional schematic diagram of the utility model after the cleaning carbon brush is installed;

[0028] Figure 4 It is a three-dimensional schematic diagram of the utility model when working.

[0029] In the figure: 101, carbon lead wire; 102, cleaning carbon brush; 103, rolled spring; 104, insulating shell; 105, connecting bolt; 106, bracket; 201, rotor of the rotating equipment under test; 202, eddy current sensor; 203, cleaning area formed by the carbon brush and the rotor. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] The present invention is limited only by the claims and their full scope and equivalents. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be an installed 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figure 1In an embodiment of the utility model, an online cleaning device for an eddy current sensor includes a carbon lead wire 101, a cleaning carbon brush 102, a rolled spring 103, an insulating shell 104, a connecting bolt 105, and a bracket 106.

[0035] Specifically: since the cleaning device cannot form an electrical path with the device under test, and most of the devices under test are outdoor circulating fans, steam turbines, and motors with serious heat generation such as generators, the insulating shell 104 is made of high-temperature resistant silicone rubber; the insulating shell 104 is designed as a hollow quadrangular prism with regular openings at both ends to facilitate the placement and replacement of the cleaning carbon brush 102; a buckle position is set on one side of the insulating shell 104, and the coiled spring 103 has a buckle, which is fixed to one side of the insulating shell 104 through the buckle and the buckle position; the cleaning carbon brush 102 is placed on the insulating shell Inside 104, the height of the cleaning carbon brush 102 is higher than the height of the insulating shell 104, with a difference of 3cm~4cm, ensuring that a part of the cleaning carbon brush 102 can be extended to clean the device under test; the carbon brush lead wire 101 is set on the side where the cleaning carbon brush 102 contacts the coil spring 103; also considering the requirements of the working environment and the detection process, the bracket 106 is made of aluminum silicate fiber; the bracket 106 consists of a base and a mounting plate, and the mounting plate is mounted on the base; the mounting plate is provided with screw holes of the same number and one-to-one correspondence with the connecting bolts 105; please refer to Figure 2-Figure 3 The other side of the insulating housing 104 that is not fixed with the coiled spring 103 is fixed to the bracket 106 through the connecting bolt 105; this constitutes the online cleaning device of the eddy current sensor as a whole.

[0036] See also Figure 4 The working principle of the utility model is specifically as follows:

[0037] The rotor 201 of the rotating equipment to be tested is started, and the eddy current sensor begins to detect, the detection area of ​​the eddy current sensor is determined, and an eddy current sensor online cleaning device is installed at the corresponding position. The cleaning interval is the cleaning interval 203 formed by the carbon brush and the rotor, and the cleaning interval is the detection area of ​​the eddy current sensor. When installing or replacing the cleaning brush 102, it is only necessary to move the rolled spring 103 and then place the cleaning brush 102, without stopping the motor for operation.

[0038] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. An eddy current sensor online cleaning device, characterized in that: include: Carbon brush lead wire (101), cleaning carbon brush (102), rolled spring sheet (103), insulating housing (104), connecting bolt (105), bracket (106); A buckle position is provided on one side of the insulating shell (104); the rolled spring sheet (103) has a buckle; the rolled spring sheet (103) is fixed to one side of the insulating shell (104) via the buckle and the buckle position on the insulating shell (104); The cleaning carbon brush (102) is placed inside the insulating housing (104); The carbon brush lead wire (101) is arranged on a side where the cleaning carbon brush (102) contacts the coil spring of the coiled spring sheet (103); The other side surface of the insulating housing (104) opposite to the side surface on which the rolled spring sheet (103) is fixed is fixed to a bracket (106).

2. The eddy current sensor online cleaning device according to claim 1 is characterized in that: The insulating shell (104) is a hollow quadrangular prism.

3. The online cleaning device for eddy current sensor according to claim 1 is characterized in that: The height of the cleaning carbon brush (102) is higher than the height of the insulating housing (104), with the difference being 3 cm to 4 cm.

4. The eddy current sensor online cleaning device according to claim 1, characterized in that: The other side of the insulating housing (104) where the coiled spring (103) is not fixed is provided with screw holes corresponding to the above-mentioned connecting bolts (105) one by one.

5. The online cleaning device for eddy current sensor according to claim 1, characterized in that: The bracket (106) comprises a base and a mounting plate, wherein the mounting plate is mounted on the base.

6. The eddy current sensor online cleaning device according to claim 5, characterized in that: The mounting plate is provided with screw holes corresponding one to one with the connecting bolts (105).

7. The eddy current sensor online cleaning device according to claim 1, characterized in that: The insulating shell (104) is made of high temperature resistant silicone rubber.

8. The eddy current sensor online cleaning device according to claim 1, characterized in that: The support (106) is made of aluminum silicate fiber.

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