Impeller rotating speed sensor installation centering device and impeller rotating speed sensor installation method

Abstract

The invention relates to the technical field of wind power generation, and discloses an impeller rotating speed sensor installation centering device and an impeller rotating speed sensor installation method, and the device comprises a cambered surface substrate, a positioning piece and a sensor limiting part. The inner cambered surface of the cambered-surface substrate is matched with the curved surface of the rotating speed hole flange; the positioning piece is arranged on the back of the substrate and used for fixing the device to a flange plate; the sensor limiting part is arranged on the front surface of the substrate and is used for circumferentially limiting the sensor, so that the detection center line is aligned with the center line of the rotating speed hole; the thickness of the cambered surface substrate is configured to form a preset sensing gap between the end face of the sensor and the surface of the rotating speed hole. During installation, the device is firstly fixed through the positioning piece, then the sensor is placed in the limiting part and abuts against the front face of the base plate, and finally the sensor is fixed and the device is taken down. According to the invention, the centering function and the distance fixing function are integrated, through physical reference transfer and limiting, rapid, accurate and standardized installation of the sensor is realized, and the installation efficiency, precision and consistency are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a rotor speed sensor installation and alignment device and a rotor speed sensor installation method. Background Technology

[0002] In wind power generation, rotor speed is a key parameter for monitoring the unit's operating status, achieving precise control, and diagnosing faults. The rotor speed sensor (usually a proximity switch) needs to be precisely installed near the rotating parts of the unit, with its detection end face aligned directly with the speed measuring hole (or "speed aperture") on the rotor disk, maintaining a very precise air gap (typically 2-3 mm). The accuracy of this gap, as well as the alignment precision between the sensor's neutral line and the center line of the speed measuring hole, directly determines the stability and strength of the signal acquisition. Improper installation can easily lead to weak or intermittent sensor output signals, causing false "speed comparison" faults in the unit, resulting in unplanned shutdowns and severely impacting power generation efficiency and operational safety.

[0003] Currently, the installation and debugging of this sensor mainly rely on manual visual inspection and manual adjustment methods. Technicians rely entirely on visual observation to try to align the sensor's "neutral line" with the center line of the "rotation hole" on the rotating disk. At the same time, they use feeler gauges or rely on experience to manually adjust the sensor position to control the gap between its end face and the surface of the rotating disk.

[0004] This method has significant drawbacks: First, the installation accuracy depends entirely on the individual experience and skill level of the technicians, and the results vary greatly among different personnel, making standardization impossible and resulting in poor consistency; second, to meet the requirements, repeated disassembly, adjustment, and measurement are required, which is a cumbersome and time-consuming process with low installation efficiency. Summary of the Invention

[0005] This invention provides an impeller speed sensor installation and alignment device and an impeller speed sensor installation method to solve the above-mentioned problems.

[0006] In a first aspect, the present invention provides an impeller speed sensor mounting and alignment device, comprising: Curved base plate; the curvature of its inner curved surface matches the curvature of the flange of the rotation hole; A positioning element is disposed on the back side of the curved substrate; the positioning element is configured to fix the curved substrate to the curved surface of the flange; A sensor limiting part is disposed on the front side of the arc-shaped substrate; the sensor limiting part is configured to limit the impeller speed sensor in the circumferential direction so that the detection centerline of the impeller speed sensor is aligned with the centerline of the speed hole. The thickness of the arc-shaped substrate is configured to form a preset sensing gap between the end face of the impeller speed sensor and the surface of the speed hole.

[0007] In use, the operator first secures the device to the appropriate position on the flange using the positioning components. Then, simply place the impeller speed sensor into the sensor limiting part, ensuring its end face naturally rests against the front of the curved substrate, and then directly tighten the sensor's mounting bolts. During this process, sensor alignment (ensuring this through the limiting part) and gap setting (ensuring this through the substrate thickness) are completed synchronously and automatically, requiring no additional measurement or adjustment, greatly improving installation accuracy, consistency, and efficiency.

[0008] In one alternative embodiment, the positioning element has at least two positioning supports, which are adapted to be inserted into the rotational speed hole.

[0009] In one alternative embodiment, the positioning element includes a fixed support and a movable support; The fixed support is fixedly connected to the back side of the curved substrate; The impeller speed sensor mounting and centering device also includes a limiting through groove formed on the arc-shaped base plate, and the movable support column is movably inserted into the limiting through groove.

[0010] During installation, the operator first inserts the fixed support into one rotation hole, allowing the device to rotate slightly around that point. Then, by moving the movable support in the limiting slot, it is aligned and inserted into the other rotation hole. This "one fixed, one movable" design effectively accommodates and compensates for minor spacing errors or installation tolerances that may exist between the two rotation holes on different units. Once both supports are inserted into their corresponding holes, the device is securely and precisely locked to the flange. Compared to a rigid design using two fixed-spacing supports, the flexible adjustment capability provided by this embodiment significantly improves the versatility and fault tolerance of the tooling, ensuring equally reliable positioning on different equipment.

[0011] In one optional embodiment, the limiting groove is an arc-shaped groove, the central arc of which coincides with the central arc of the arc-shaped substrate.

[0012] The central arc of this arc-shaped groove coincides with the central arc of the curved substrate. This design ensures that the trajectory of the movable support axis strictly follows the central symmetry line of the curved substrate as it slides along the arc-shaped groove to accommodate different rotational speed hole spacings. This means that no matter where the movable support slides within the groove, the reference line determined by the axis of the fixed support and the axis of the movable support will always pass through or be parallel to the core reference plane of the substrate. This design fundamentally guarantees that the accuracy and consistency of its positioning reference will not deviate during the necessary positional adjustments made to accommodate installation tolerances, thereby elevating installation precision to a higher level.

[0013] In one optional embodiment, the line connecting the axes of the fixed support and the movable support intersects the upper and lower center arcs of the curved substrate.

[0014] Both the fixed and movable support columns have their own central axes. Regardless of the position of the movable support column within the limiting slot, the virtual straight line connecting the axes of the fixed and movable support columns intersects the upper and lower central arcs of the curved base plate in space. This ensures that the accuracy and consistency of the positioning references for the fixed and movable support columns will not deviate in any way.

[0015] In one alternative embodiment, the diameter of the positioning strut is configured to form a transition fit or interference fit with the rotational speed hole.

[0016] In one alternative implementation, the positioning element is a magnetic element.

[0017] The magnetic chuck is fixedly mounted on the back of the curved substrate. The magnetic chuck can be one or more powerful permanent magnets (such as neodymium iron boron magnets) or an electromagnetic chuck. They are arranged on the back of the substrate to ensure that the generated attraction force is sufficient to overcome the weight of the device and sensor, and to maintain stable position under slight external interference. During installation, the operator simply needs to place the inner curved surface of the curved substrate close to the steel curved surface of the target flange; the magnetic chuck will automatically generate a strong magnetic force, quickly and firmly attaching the entire device to the designated position on the flange.

[0018] In one optional embodiment, the sensor limiting part is an arc-shaped limiting wall protruding from the front side of the arc-shaped substrate.

[0019] The arc-shaped limiting wall is a section or continuous arc-shaped wall structure integrally formed or fixedly connected to the front of the arc-shaped substrate. The arc-shaped direction of the limiting wall is coordinated with the curvature of the arc-shaped substrate, and its inner wall surface forms a guide surface for accommodating and constraining the impeller speed sensor.

[0020] During installation, the impeller speed sensor is placed on the front of the curved substrate, with the side of its cylindrical housing in contact with the inner wall of the curved limiting wall. Due to the curved constraint of the limiting wall, the sensor's rotational freedom in the circumferential direction is effectively restricted. When the sensor housing is in close contact with the inner wall of the limiting wall, its detection centerline is forcibly guided to a specific direction determined by the geometry of the curved limiting wall. This direction is consistent with the device reference direction established by the positioning element and aligned with the centerline of the speed hole, thus achieving precise centering of the sensor. The curved limiting wall structure provides stable and reliable lateral support and guidance for the sensor. Compared to simple point or block-shaped limiting, this continuous linear contact constraint is more effective and accurate.

[0021] In one optional embodiment, the thickness of the curved substrate is 2mm-3mm.

[0022] In one alternative embodiment, the curved substrate consists of a standard thickness substrate and at least one adjustment shim detachably attached to its back side.

[0023] The curved substrate achieving a predetermined thickness is a modular structure. It includes a standard thickness substrate and at least one adjusting shim. The standard thickness substrate serves as the main body, and its thickness can be a base value (e.g., 2 mm). The adjusting shim is detachably attached to the back of the standard thickness substrate by means of screws, clips, or magnetic adsorption. The adjusting shim has a precise thickness, and the operator can change the effective total thickness of the entire device (i.e., the sum of the standard substrate thickness and the shim thickness) by adding, removing, or replacing adjusting shims of different thicknesses.

[0024] Secondly, the present invention also provides a method for installing an impeller speed sensor, comprising the following steps: Insert the positioning support in the impeller speed sensor installation centering device into the corresponding speed hole, so that the inner arc surface of the arc substrate fits against the flange. Place the impeller speed sensor into the sensor limiting part and make its end face abut against the front side of the arc-shaped substrate; While maintaining the sensor's position, it is fixedly installed; Remove the mounting and centering device from the rotation hole. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an impeller speed sensor mounting and centering device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an impeller speed sensor installation and alignment device according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. Curved substrate; 2. Sensor limiting part; 3. Impeller speed sensor; 4. Fix the support pillars; 5. Activity pillars; 6. Limiting through groove. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In wind power generation, rotor speed is a key parameter for monitoring the unit's operating status, achieving precise control, and diagnosing faults. The rotor speed sensor (usually a proximity switch) needs to be precisely installed near the rotating parts of the unit, with its detection end face aligned directly with the speed measuring hole (or "speed aperture") on the rotor disk, maintaining a very precise air gap (typically 2-3 mm). The accuracy of this gap, as well as the alignment precision between the sensor's neutral line and the center line of the speed measuring hole, directly determines the stability and strength of the signal acquisition. Improper installation can easily lead to weak or intermittent sensor output signals, causing false "speed comparison" faults in the unit, resulting in unplanned shutdowns and severely impacting power generation efficiency and operational safety.

[0030] Currently, the installation and debugging of this sensor mainly rely on manual visual inspection and manual adjustment methods. Technicians rely entirely on visual observation to try to align the sensor's "neutral line" with the center line of the "rotation hole" on the rotating disk. At the same time, they use feeler gauges or rely on experience to manually adjust the sensor position to control the gap between its end face and the surface of the rotating disk.

[0031] This method has significant drawbacks: First, the installation accuracy depends entirely on the individual experience and skill level of the technicians, and the results vary greatly among different personnel, making standardization impossible and resulting in poor consistency; second, to meet the requirements, repeated disassembly, adjustment, and measurement are required, which is a cumbersome and time-consuming process with low installation efficiency.

[0032] The following is combined with Figures 1 to 2 The following describes embodiments of the present invention.

[0033] According to an embodiment of the present invention, in one aspect, an impeller speed sensor mounting and alignment device is provided, including an arc-shaped base plate 1, a positioning member, and a sensor limiting part 2. The curvature of the inner arc surface of the arc-shaped base plate 1 matches the curvature of the flange of the speed hole; the positioning member is disposed on the back side of the arc-shaped base plate 1; the positioning member is configured to fix the arc-shaped base plate 1 on the curved surface of the flange; the sensor limiting part 2 is disposed on the front side of the arc-shaped base plate 1; the sensor limiting part 2 is configured to limit the circumferential direction of the impeller speed sensor 3 so that the detection centerline of the impeller speed sensor 3 is aligned with the centerline of the speed hole; wherein, the thickness of the arc-shaped base plate 1 is configured to form a preset sensing gap between the end face of the impeller speed sensor 3 and the surface of the speed hole.

[0034] This embodiment provides an impeller speed sensor installation and alignment device, the core of which is to integrate positioning and limiting functions through an arc-shaped base plate 1 with a specific thickness, so as to realize the rapid and accurate installation of the impeller speed sensor 3.

[0035] The curved base plate 1 serves as the carrier and distance setting component of the device, and its structural design is as follows: The base plate is curved to fit the outer flange of the wind turbine generator's speed hole. The radius of curvature of its inner curved surface is precisely calculated to match the curvature of the target flange surface, ensuring a tight and stable fit during installation. The thickness of the curved base plate 1 is determined based on the optimal sensing performance required by the impeller speed sensor 3. When the sensor is installed close to the front of the curved base plate 1, this thickness can be directly and accurately converted into a preset sensing gap between the sensor's detection end face and the surface of the speed hole on the rotating component, thus eliminating the tedious step of separately measuring and adjusting the gap during installation.

[0036] The positioning element is located on the back side of the curved base plate 1 (i.e., the side facing the flange). The main function of the positioning element is to quickly, temporarily, and accurately fix the entire device in a predetermined position on the flange. In one implementation of this embodiment, the positioning element can be one or more components capable of engaging with existing structures on the flange (such as bolt holes, process holes, or dedicated positioning holes). Through insertion, snap-fit, or adsorption, it maintains a defined relative position between the inner curved surface of the curved base plate 1 and the curved surface of the flange, thereby establishing a reliable physical reference for subsequent sensor installation.

[0037] The sensor limiting part 2 is disposed on the front side of the curved base plate 1 (i.e., the side facing the sensor away from the flange). This limiting part is configured to constrain and limit the impeller speed sensor 3 in its circumferential direction (i.e., the direction of rotation around the sensor's own axis) when the impeller speed sensor 3 is placed there. Its limiting effect forces the sensor's detection centerline (i.e., the central symmetry line of the sensor's sensing area) to be aligned with a reference line determined by the device positioning that coincides with the centerline of the speed aperture, thereby achieving precise alignment between the sensor and the speed aperture.

[0038] In use, the operator first secures the device to the appropriate position on the flange using the positioning components. Then, simply place the impeller speed sensor 3 into the sensor limiting part 2, ensuring its end face naturally abuts against the front of the curved substrate 1, and then directly tighten the sensor's mounting bolts. During this process, sensor alignment (ensuring this alignment) and gap setting (ensuring this gap setting) are completed synchronously and automatically, requiring no additional measurement or adjustment, greatly improving installation accuracy, consistency, and efficiency.

[0039] In one embodiment, the positioning element has at least two positioning pillars, which are adapted to be inserted into the rotational speed hole.

[0040] In this embodiment, the positioning element disposed on the back of the curved base plate 1 specifically includes at least two positioning supports. These positioning supports are designed and arranged to be directly and securely inserted into the existing rotation holes on the rotating component flange of the wind turbine generator. The positioning supports are typically cylindrical pin structures with diameters matching the diameter of the rotation holes, and can employ transition fits or interference fits to ensure that the device remains fixed in position after insertion while facilitating installation and disassembly. By simultaneously inserting two or more positioning supports into the corresponding rotation holes, all degrees of freedom (including translation and rotation) of the curved base plate 1 on the flange surface are fully constrained, thereby achieving precise positioning and reliable fixation of the device on the flange. This positioning method directly utilizes the high-precision existing structure (rotation holes) on the equipment body as an installation reference, transforming the abstract "centering reference line" into a tangible physical entity (i.e., a reference surface determined by the centers of the two supports), which is the key to achieving high-precision "reference transfer" in this invention.

[0041] In one embodiment, the positioning element includes a fixed support column 4 and a movable support column 5; the fixed support column 4 is fixedly connected to the back side of the curved substrate 1; the impeller speed sensor mounting and centering device also includes a limiting through groove 6 opened on the curved substrate 1, and the movable support column 5 is movably inserted into the limiting through groove.

[0042] The fixed support 4 is fixedly connected (e.g., by welding, threaded connection, or integral molding with the substrate) to the back of the curved substrate 1. This support serves as the primary reference for the device, and during installation, it is first inserted into a selected rotation hole, providing an initial, reliable fixing point and rotation fulcrum for the device. A limiting slot 6 is formed on the curved substrate 1. This slot penetrates the substrate, and its length direction generally follows the curvature of the substrate. The movable support 5 serves as an adjustable secondary reference, passing through the limiting slot 6 and capable of sliding or moving along the length direction of the slot. The movable support 5 and the slot are typically clearance-fitted to ensure smooth sliding.

[0043] During installation, the operator first inserts the fixed support 4 into one rotation hole, allowing the device to rotate slightly around that point. Then, by moving the movable support 5 within the limiting slot 6, it is aligned and inserted into the other rotation hole. This "one fixed, one movable" design effectively accommodates and compensates for minor spacing errors or installation tolerances that may exist between the two rotation holes on different units. Once both supports are inserted into their corresponding holes, the device is securely and precisely locked onto the flange. Compared to a rigid design using two fixed-spacing supports, the flexible adjustment capability provided by this embodiment significantly improves the versatility and fault tolerance of the tooling, ensuring equally reliable positioning on different equipment.

[0044] In one embodiment, the limiting groove is an arc-shaped groove, the central arc of which coincides with the central arc of the arc-shaped substrate 1.

[0045] The central arc of this arc-shaped groove coincides with the central arc of the arc-shaped substrate 1. This design ensures that the trajectory of the movable support 5's axis strictly follows the central symmetry line of the arc-shaped substrate 1 as it slides along the arc-shaped groove to accommodate different rotational speed hole spacings. This means that no matter where the movable support 5 slides within the groove, the reference line determined by the axis of the fixed support 4 and the axis of the movable support 5 will always pass through or be parallel to the core reference surface of the substrate. This design fundamentally guarantees that the accuracy and consistency of its positioning reference will not deviate during the necessary positional adjustments made to accommodate installation tolerances, thereby raising the installation accuracy to a higher level.

[0046] In one embodiment, the line connecting the axes of the fixed support 4 and the movable support 5 intersects the upper and lower center arcs of the curved substrate 1.

[0047] Both the fixed support column 4 and the movable support column 5 have a central axis. Regardless of the position of the movable support column 5 within the limiting slot 6, the virtual straight line connecting the axis of the fixed support column 4 and the axis of the movable support column 5 intersects the upper and lower central arc lines of the curved base plate 1 in space. This ensures that the accuracy and consistency of the positioning references of the fixed support column and the movable support column 5 will not deviate in any way.

[0048] In one embodiment, the diameter of the positioning strut is configured to form a transition fit or interference fit with the rotational speed hole.

[0049] Whether it's a transition fit or an interference fit, this precise dimensional configuration ensures that the positioning support can immediately establish a defined, reliable, and repeatable mechanical connection after being inserted into the rotational speed hole. It replaces the unreliable fixing methods of traditional approaches that rely on bolt pre-tightening or manual support, fundamentally eliminating the possibility of accidental movement or offset of the device during installation. This provides a crucial and stable foundation for the high-precision alignment and spacing of subsequent sensors.

[0050] In one embodiment, the positioning element is a magnetic element.

[0051] Magnetic chucks are fixedly mounted on the back of the curved substrate 1. The magnetic chucks can be one or more powerful permanent magnets (such as neodymium iron boron magnets) or an electromagnetic chuck. They are arranged on the back of the substrate to ensure that the generated attraction force is sufficient to overcome the weight of the device and sensor, and to maintain a stable position under slight external interference. During installation, the operator simply needs to place the inner curved surface of the curved substrate 1 close to the steel curved surface of the target flange, and the magnetic chucks will automatically generate a strong magnetic force, quickly and firmly attaching the entire device to the designated position on the flange.

[0052] This magnetic positioning solution offers significant installation convenience. First, it eliminates the need to locate or align specific physical holes (such as rotation holes); simply placing the device near the approximate area allows for magnetic attachment, reducing the requirements for installation space and visibility of reference holes. Second, the operation is extremely fast, with instant attachment, greatly shortening installation preparation time. Finally, it provides a contactless and wear-free fixing method, preventing scratches or mechanical stress on the equipment body (such as flange surfaces or hole walls), making it particularly suitable for applications requiring avoidance of damage to precision components or frequent disassembly / reassembly.

[0053] In one embodiment, the sensor limiting part 2 is an arc-shaped limiting wall protruding from the front of the arc-shaped substrate 1.

[0054] The arc-shaped limiting wall is a section or continuous arc-shaped wall structure integrally formed or fixedly connected to the front of the arc-shaped base plate 1. The arc-shaped direction of the limiting wall is coordinated with the curvature of the arc-shaped base plate 1, and its inner wall surface forms a guide surface for accommodating and constraining the impeller speed sensor 3.

[0055] During installation, the impeller speed sensor 3 is placed on the front of the curved base plate 1, with the side of its cylindrical housing in contact with the inner wall of the curved limiting wall. Due to the curved constraint of the limiting wall, the sensor's rotational freedom in the circumferential direction is effectively restricted. When the sensor housing is in close contact with the inner wall of the limiting wall, its own detection centerline is forcibly guided to a specific direction determined by the geometry of the curved limiting wall. This direction is consistent with the device reference direction established by the positioning element and aligned with the centerline of the speed hole, thus achieving precise centering of the sensor. The curved limiting wall structure provides stable and reliable lateral support and guidance for the sensor. Compared to simple point or block-shaped limiting, this continuous linear contact constraint is more effective and accurate.

[0056] In one embodiment, the thickness of the curved substrate 1 is 2mm-3mm. The curved substrate 1 consists of a standard thickness substrate and at least one adjustment shim detachably connected to its back side.

[0057] In this embodiment, the curved substrate 1 is manufactured with a precise fixed thickness. This thickness is specifically designed to be between 2 mm and 3 mm. Preferably, the thickness is 2.5 mm; this thickness range is an engineered preset sensing gap that ensures the impeller speed sensor 3 obtains the optimal detection signal. When using this fixed-thickness substrate, the gap between the sensor's mounted end face and the speed hole surface will be automatically and steplessly set within this optimal range without any adjustment, achieving a high degree of standardization and consistency in installation.

[0058] Furthermore, in this embodiment, the curved substrate 1 achieving the predetermined thickness is a modular structure. It includes a standard thickness substrate and at least one adjusting shim. The standard thickness substrate serves as the main body, and its thickness can be a base value (e.g., 2 mm). The adjusting shim is detachably connected to the back of the standard thickness substrate by means of screws, clips, or magnetic adsorption. The adjusting shim has a precise thickness, and the operator can change the effective total thickness of the entire device (i.e., the sum of the standard substrate thickness and the shim thickness) by adding, removing, or replacing adjusting shims of different thicknesses.

[0059] According to an embodiment of the present invention, another aspect provides a method for installing an impeller speed sensor 3, comprising the following steps: Insert the positioning support in the impeller speed sensor installation centering device into the corresponding speed hole so that the inner arc surface of the arc base plate 1 is attached to the flange. Place the impeller speed sensor 3 into the sensor limiting part 2 and make its end face abut against the front of the curved substrate 1; Securely install the sensor while maintaining its position; Remove the centering device from the rotation hole.

[0060] This embodiment provides a standardized installation method for installing the alignment device using any of the foregoing embodiments. This method transforms the traditional complex process, which relies on experience and repeated debugging, into a series of simple, reliable, and repeatable steps.

[0061] Preparation: Ensure the wind turbine is in the locked position. Clean the speed hole area on the sensor mounting base and rotating component flange.

[0062] Step 1: Position and fix the centering device: The handheld impeller speed sensor is installed and aligned by aligning the positioning part on its back with the corresponding structure on the flange, so that the entire device is stably fixed in the preset installation reference position.

[0063] If using a positioning support type device: Hold the tool and insert the fixing positioning support of the tool into a speed hole that is close to the sensor base from the inner ring surface of the speed hole flange, so that the tool contacts the speed hole flange. Rotate the tool clockwise. When the pin hole of the arc plate 1 is aligned with the speed hole, insert the pin-type positioning support to make the tool fit tightly with the speed hole flange.

[0064] If a magnetic device is used: place the back of the device close to the steel curved surface of the flange, and the magnetic component will automatically adhere, so that the inner curved surface of the curved base plate 1 is tightly fixed.

[0065] Step 2: Place and position the sensor: Place the impeller speed sensor 3 to be installed into the sensor limiting part 2 of the fixed device. Guided by the limiting part (such as an arc-shaped limiting wall), gently push the sensor in until its detection end face is completely and flat against the front surface of the arc-shaped base plate 1. At this moment, the detection centerline of the sensor has been automatically and precisely aligned with the centerline of the speed hole by the limiting part, and the sensing gap between its end face and the surface of the speed hole has been precisely set by the thickness of the arc-shaped base plate 1.

[0066] Step 3: Fix the sensor: While keeping the sensor position absolutely unchanged, use tools to tighten the sensor's mounting bolts to the specified torque, firmly fixing it to the unit base. Due to the limiting and supporting properties of the tooling, this fixing process will not cause any displacement of the sensor.

[0067] Step 4: Disassemble the centering device: After the sensor is fixed in place, remove the mounting and alignment device from the flange in the reverse order of installation.

[0068] For positioning support type devices: After the sensor is fixed, pull out the pin-type positioning support, rotate the fixture counterclockwise until the fixture and the sensor part do not overlap in the vertical direction, then gently pull out the fixture in the vertical direction to complete the sensor centering process.

[0069] For magnetic devices: overcome the magnetic force and move the device horizontally away.

[0070] At this point, the precise installation of the impeller speed sensor 3 is completed in one go, without any subsequent adjustments.

[0071] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A device for aligning and mounting an impeller speed sensor, characterized in that, include: Arc-shaped substrate (1); its inner arc curvature matches the curvature of the flange of the rotation hole; A positioning element is disposed on the back side of the arc-shaped base plate (1); the positioning element is configured to fix the arc-shaped base plate (1) to the curved surface of the flange; A sensor limiting part (2) is provided on the front side of the arc-shaped substrate (1); the sensor limiting part (2) is configured to limit the impeller speed sensor (3) in the circumferential direction so that the detection center line of the impeller speed sensor (3) is aligned with the center line of the speed hole. The thickness of the arc-shaped substrate (1) is configured to form a preset sensing gap between the end face of the impeller speed sensor (3) and the surface of the speed hole.

2. The impeller speed sensor mounting and alignment device according to claim 1, characterized in that, The positioning element has at least two positioning supports, which are adapted to be inserted into the rotation speed hole.

3. The impeller speed sensor mounting and alignment device according to claim 2, characterized in that, The positioning component includes a fixed support column (4) and a movable support column (5); The fixed support (4) is fixedly connected to the back side of the arc-shaped base plate (1); The impeller speed sensor mounting and centering device also includes a limiting through groove (6) opened on the arc-shaped base plate (1), and the movable support (5) is movably inserted into the limiting through groove.

4. The impeller speed sensor mounting and alignment device according to claim 3, characterized in that, The limiting groove is an arc-shaped groove, and its central arc coincides with the central arc of the arc-shaped substrate (1).

5. The impeller speed sensor mounting and alignment device according to claim 3, characterized in that, The line connecting the axes of the fixed support (4) and the movable support (5) intersects the upper and lower center arcs of the arc-shaped base plate (1).

6. The impeller speed sensor mounting and alignment device according to any one of claims 2-5, characterized in that, The diameter of the positioning support is configured to form a transition fit or an interference fit with the rotation speed hole.

7. The impeller speed sensor mounting and alignment device according to claim 1, characterized in that, The positioning element is a magnetic element.

8. The impeller speed sensor mounting and alignment device according to claim 1, characterized in that, The sensor limiting part (2) is an arc-shaped limiting wall that protrudes from the front of the arc-shaped substrate (1).

9. The impeller speed sensor mounting and alignment device according to claim 1, characterized in that, The thickness of the arc-shaped substrate (1) is 2mm-3mm.

10. The impeller speed sensor mounting and alignment device according to claim 9, characterized in that, The curved substrate (1) consists of a standard thickness substrate and at least one adjustment shim detachably connected to its back side.

11. A method for installing an impeller speed sensor, characterized in that, Includes the following steps: Insert the positioning support in the impeller speed sensor installation centering device into the corresponding speed hole so that the inner arc surface of the arc base plate (1) fits against the flange. Place the impeller speed sensor (3) into the sensor limiting part (2) and make its end face abut against the front of the arc-shaped substrate (1); Securely install the sensor while maintaining its position; Remove the mounting and centering device from the rotation hole.

Images