A sensor preamplifier assembly with thermal isolation

Abstract

The utility model discloses a sensor preprocessor assembly with heat insulation function, it includes sensor preprocessor body, fibre heat insulating spare and mounting piece, sensor preprocessor body is cylindrical structure, fibre heat insulating spare is fibre structure, and fibre heat insulating spare is around the outer surface of sensor preprocessor body, to form the cylindrical heat insulation sleeve for the heat insulation of sensor preprocessor body at the outer surface of sensor preprocessor body, and the inner diameter of cylindrical heat insulation sleeve is not less than the outer diameter of sensor preprocessor body, mounting piece is sleeved in the periphery of cylindrical heat insulation sleeve, and mounting piece is used for detachably mounting cylindrical heat insulation sleeve on support. The sensor preprocessor assembly with heat insulation function through setting fibre heat insulating spare outside sensor preprocessor body, when sensor preprocessor body is in high temperature environment, the conduction of isolated radiation, guarantees the detection accuracy of sensor preprocessor, and improves the service life of sensor preprocessor.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic levitation bearing technology, and in particular relates to a sensor preamplifier assembly with heat insulation function. Background Technology

[0002] With the development of high-power, high-speed motors and the ever-increasing demand, bearings, as key support components of high-speed precision rotors, directly affect the motor's operational stability and lifespan. Magnetic levitation bearings, due to their significant characteristics such as non-contact operation, low noise, active controllability, and high power density, have gained widespread application in the industrial field. However, monitoring the displacement of ultra-high-speed rotors during operation has become a crucial challenge. To ensure stable rotor operation, advanced equipment such as eddy current sensors is typically used for real-time online monitoring of the shaft in high-temperature environments. This monitoring covers multiple key parameters, including shaft vibration, displacement, and rotational speed, to promptly identify and resolve potential problems. Among these monitoring devices, the sensor preamplifier is crucial. As the signal processing unit of the sensor, the preamplifier contains numerous precision electronic components responsible for the initial processing and analysis of the signals collected by the sensor. It amplifies weak sensor signals, performs detection and filtering to improve detection accuracy, enabling subsequent monitoring systems to accurately interpret these signals and achieve precise monitoring of the rotor's operating status.

[0003] However, sensor preamplifiers are usually mounted near the equipment via brackets and are exposed to high-temperature environments for a long time. This leads to a decrease in the measurement accuracy of the preamplifier under high-temperature heat radiation and heat conduction: the parameters of the electronic components inside the preamplifier drift due to temperature, resulting in output signal distortion. Long-term high-temperature operation accelerates the aging of electronic components and may even cause permanent damage, affecting the service life of the preamplifier. Utility Model Content

[0004] The purpose of this invention is to provide a sensor preamplifier assembly with heat insulation function to solve the problem that conventional sensor preamplifiers in the prior art are exposed to high temperature environment for a long time, resulting in a decrease in measurement accuracy.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A sensor preamplifier assembly with thermal insulation function includes a sensor preamplifier body, a fiber thermal insulation component, and a mounting component, wherein:

[0007] The sensor preamplifier body is a cylindrical structure, and the fiber heat insulation component is a fiber structure. The fiber heat insulation component is wound around the outer surface of the sensor preamplifier body to form a cylindrical heat insulation sleeve for heat insulation of the sensor preamplifier body on the outer surface of the sensor preamplifier body. The inner diameter of the cylindrical heat insulation sleeve is not less than the outer diameter of the sensor preamplifier body.

[0008] The mounting element is fitted around the cylindrical heat insulation sleeve, and the mounting element is configured to detachably mount the cylindrical heat insulation sleeve onto the support.

[0009] Furthermore, the fiber insulation component is made of basalt fiber material.

[0010] Furthermore, the cylindrical heat insulation sleeve includes a first heat insulation sleeve wound around the outer circular surface of the sensor preamplifier body and a second heat insulation sleeve wound around one end of the sensor preamplifier body along the axial direction. The middle part of the second heat insulation sleeve and the middle part of the other end of the cylindrical heat insulation sleeve are provided with clearance holes. The inner diameter of the clearance hole is smaller than the outer diameter of the sensor preamplifier body. The lead wire of the sensor preamplifier body located in the first heat insulation sleeve is led out through the clearance hole.

[0011] Furthermore, the mounting component includes at least one clamp, each clamp having a mounting hole, and the support having at least one threaded hole, each threaded hole corresponding to one mounting hole. The shank of the bolt passes through the mounting hole and is tightened into the corresponding threaded hole, so that the head of the bolt presses against the clamp, thereby installing the cylindrical heat insulation sleeve on the support.

[0012] Furthermore, there are two clamps, and the two clamps are spaced apart by a preset length.

[0013] Furthermore, each of the clamps is made of stainless steel.

[0014] Compared with existing technologies, the advantages of the sensor preamplifier assembly with heat insulation function are as follows:

[0015] 1) By setting a fiber heat insulation component on the outside of the sensor preamplifier body, the fiber heat insulation component is wrapped around the outer surface of the sensor preamplifier body, forming a cylindrical heat insulation sleeve for heat insulation of the sensor preamplifier body on the outer surface of the sensor preamplifier body. The mounting component is sleeved on the outer periphery of the cylindrical heat insulation sleeve to detachably install the cylindrical heat insulation sleeve on the support. When the sensor preamplifier body is in a high temperature environment, the conduction of radiation is isolated, ensuring the detection accuracy of the sensor preamplifier and improving the service life of the sensor preamplifier.

[0016] 2) By setting the fiber insulation component as basalt fiber material, it not only has good heat insulation effect, but also corrosion resistance, low mechanical strength and low cost, making it very suitable for use as heat insulation material for sensor preamplifiers in applications such as magnetic bearings in marine vessels. Attached Figure Description

[0017] To more clearly illustrate and understand the technical solutions in the embodiments of this utility model, the accompanying drawings used in the background technology and embodiment description of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the sensor preamplifier assembly with heat insulation function provided in this embodiment of the utility model;

[0019] Figure 2 This is a top view schematic diagram of a sensor preamplifier assembly with heat insulation function provided in an embodiment of the present utility model;

[0020] Figure 3 This is a side view schematic diagram of a sensor preamplifier assembly with heat insulation function provided in an embodiment of the present utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of a sensor preamplifier assembly with heat insulation function provided in an embodiment of this utility model. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] To facilitate understanding of this utility model, a more complete description of it will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Please see Figures 1 to 4 As shown, in this embodiment, a sensor preamplifier assembly with heat insulation function includes a sensor preamplifier body 10, a fiber heat insulation element 20, and a mounting element 30, wherein: the sensor preamplifier body 10 has a cylindrical structure, the fiber heat insulation element 20 has a fiber structure, the fiber heat insulation element 20 is wound around the outer surface of the sensor preamplifier body 10 to form a cylindrical heat insulation sleeve for heat insulation of the sensor preamplifier body 10 on the outer surface of the sensor preamplifier body 10, and the inner diameter of the cylindrical heat insulation sleeve is not less than the outer diameter of the sensor preamplifier body 10; the mounting element 30 is sleeved on the periphery of the cylindrical heat insulation sleeve, and the mounting element 30 is configured to detachably install the cylindrical heat insulation sleeve on the support.

[0025] It should be noted that the sensor preamplifier body 10 is the component to be protected in this application. Taking a motor as an example, most sensor preamplifier bodies 10 are placed in the sensor compartment outside the motor, while some specific motors need to be placed inside the casing, which will cause the operating temperature of the sensor preamplifier body 10 to rise. The exterior is usually made of metal material, and the interior contains electronic components and potting materials, etc. Its function is to provide the necessary working conditions for the sensor probe and to convert and condition the weak and raw physical signals detected by the probe into standard, stable, reliable electrical signals that are easy to be identified and used by subsequent systems.

[0026] As can be seen, by providing a fiber heat insulation element 20 on the outside of the sensor preamplifier body 10, the fiber heat insulation element 20 is wrapped around the outer surface of the sensor preamplifier body 10, forming a cylindrical heat insulation sleeve for heat insulation of the sensor preamplifier body 10 on the outer surface of the sensor preamplifier body 10. The mounting part 30 is sleeved on the outer periphery of the cylindrical heat insulation sleeve to detachably install the cylindrical heat insulation sleeve on the support. When the sensor preamplifier body 10 is in a high temperature environment, the conduction of radiation is isolated, ensuring the detection accuracy of the sensor preamplifier and improving the service life of the sensor preamplifier.

[0027] In one implementation, the fiber insulation component 20 is made of basalt fiber material.

[0028] It should be noted that efficient heat insulation reduces the risk of high-temperature damage to the displacement sensor. Current heat insulation designs mostly target the sensor itself, neglecting the sensor preamplifier. In high-temperature or corrosive applications, the preamplifier can be affected, leading to component damage or inaccurate readings, thus impacting sensor measurement accuracy. The heat insulation design presented in this paper better protects the sensor preamplifier, preventing abnormally high temperatures during operation that could affect accuracy or even burn out components. Existing heat insulation materials include stainless steel, ceramics, and aerogel. While stainless steel can withstand temperatures up to 800℃+, its high thermal conductivity results in poor insulation. Ceramic materials offer insulation up to 1500℃+, providing good insulation but are brittle and easily broken. Aerogel, while not the best current insulation material, is expensive to manufacture and very fragile.

[0029] Existing thermal insulation designs often use materials with low thermal conductivity, such as stainless steel. However, their insulation effect is limited. When the surface temperature of the equipment rises abnormally (e.g., exceeding 300°C or even 400°C), the heat ultimately transferred to the sensor preamplifier body 10 installation location via heat conduction may still exceed its tolerance limit (typically 120°C). This design uses a fibrous thermal insulation sleeve made of basalt, with a continuous operating temperature range of -260°C to +700°C and an instantaneous operating temperature as high as 1000°C. It has extremely low thermal conductivity and is a thermal insulator. Compared to other thermal insulation materials, the basalt thermal insulation sleeve can achieve the same or even better insulation effect with a thinner and lighter structure, solving the problem of limited installation space. Furthermore, its inherent insulation and corrosion resistance make it more suitable for applications such as ships and marine environments where magnetic bearings are used.

[0030] Basalt fiber material is similar to yarn and can be directly wound onto the preamplifier, greatly reducing the difficulty of processing and actual installation. At the same time, it can fit the sensor preamplifier very well and has excellent heat insulation effect.

[0031] Specifically, compared with other insulation materials, basalt fiber insulation sleeves can achieve the same or even better insulation effect with a thinner and lighter structure, solving the problem of limited installation space. At the same time, it has natural insulation and corrosion resistance, making it more suitable for places such as ships and oceans where magnetic bearings are suitable.

[0032] It is evident that by setting the fiber insulation component 20 as basalt fiber material, it not only has good heat insulation effect, but also has corrosion resistance, low mechanical strength and low cost, making it very suitable for use as a heat insulation material for sensor preamplifiers in applications such as magnetic bearings in marine vessels.

[0033] In one embodiment, the cylindrical heat insulation sleeve includes a first heat insulation sleeve 21 wrapped around the outer circular surface of the sensor preamplifier body 10 and a second heat insulation sleeve 22 wrapped around one end of the sensor preamplifier body 10 along the axial direction. The middle part of the second heat insulation sleeve 22 and the middle part of the other end of the cylindrical heat insulation sleeve are provided with a clearance hole 23. The inner diameter of the clearance hole 23 is smaller than the outer diameter of the sensor preamplifier body 10. The lead wire of the sensor preamplifier body 10 located in the first heat insulation sleeve 21 is led out through the clearance hole 23.

[0034] As can be seen, by setting the clearance hole 23, it is easy for the lead wire of the sensor preamplifier body 10 to be led out of the sensor preamplifier body, and the structural layout is reasonable.

[0035] In one embodiment, the mounting component 30 includes at least one clamp 31, each clamp 31 having a mounting hole 310, and the support having at least one threaded hole, each threaded hole corresponding to a mounting hole 310. The shank of the bolt passes through the mounting hole 310 and is tightened into the corresponding threaded hole, so that the head of the bolt presses against the clamp 31, thereby installing the cylindrical heat insulation sleeve on the support.

[0036] As can be seen, the cylindrical heat insulation sleeve is detachably installed on the support by the cooperation of bolts and clamps 31.

[0037] In one implementation, two clamps 31 are provided, with a preset length interval between the two clamps 31.

[0038] Specifically, the two clamps 31 are positioned at one-fifth and four-fifths of the outer circular surface of the sensor preamplifier body 10, and are fixed to the magnetic bearing support by bolts.

[0039] In one implementation, each clamp 31 is made of stainless steel.

[0040] When assembling the aforementioned sensor preamplifier assembly with heat insulation function: the fiber heat insulation element 20 is wound around the outer surface of the sensor preamplifier body 10, and a cylindrical heat insulation sleeve for heat insulation of the sensor preamplifier body 10 is formed on the outer surface of the sensor preamplifier body 10. The first heat insulation sleeve 21 is wound around the outer circular surface of the sensor preamplifier body 10, and the second heat insulation sleeve 22 is wound around one end of the sensor preamplifier body 10 along the axial direction.

[0041] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above examples. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sensor preamplifier assembly with heat insulation function, characterized in that, The sensor preamplifier assembly with heat insulation function includes a sensor preamplifier body, a fiber heat insulation component, and a mounting component, wherein: The sensor preamplifier body is a cylindrical structure, and the fiber heat insulation component is a fiber structure. The fiber heat insulation component is wound around the outer surface of the sensor preamplifier body to form a cylindrical heat insulation sleeve for heat insulation of the sensor preamplifier body on the outer surface of the sensor preamplifier body. The inner diameter of the cylindrical heat insulation sleeve is not less than the outer diameter of the sensor preamplifier body. The mounting element is fitted around the cylindrical heat insulation sleeve, and the mounting element is configured to detachably mount the cylindrical heat insulation sleeve onto the support.

2. The sensor preamplifier assembly with heat insulation function according to claim 1, characterized in that, The fiber insulation component is made of basalt fiber material.

3. The sensor preamplifier assembly with heat insulation function according to claim 1, characterized in that, The cylindrical heat insulation sleeve includes a first heat insulation sleeve wound around the outer circular surface of the sensor preamplifier body and a second heat insulation sleeve wound around one end of the sensor preamplifier body along the axial direction. The middle part of the second heat insulation sleeve and the middle part of the other end of the cylindrical heat insulation sleeve are provided with clearance holes. The inner diameter of the clearance hole is smaller than the outer diameter of the sensor preamplifier body. The lead wire of the sensor preamplifier body located in the first heat insulation sleeve is led out through the clearance hole.

4. The sensor preamplifier assembly with heat insulation function according to claim 1, characterized in that, The mounting component includes at least one clamp, each clamp having a mounting hole. The support has at least one threaded hole, each threaded hole corresponding to one mounting hole. The shank of the bolt passes through the mounting hole and is tightened into the corresponding threaded hole, so that the head of the bolt presses against the clamp, thereby installing the cylindrical heat insulation sleeve on the support.

5. The sensor preamplifier assembly with heat insulation function according to claim 4, characterized in that, There are two clamps, and the two clamps are spaced apart by a preset length.

6. The sensor preamplifier assembly with heat insulation function according to claim 4, characterized in that, Each of the clamps is made of stainless steel.

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