A high-voltage motor vibration measurement adapter
By designing a single three-section adapter, the problems of production process stagnation and bearing cover damage caused by traditional installation methods in high-voltage motor vibration monitoring were solved. This achieved compatibility and connection stability of sensors of different specifications, and reduced maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ELECTRIC GRP SHANGHAI ELECTRIC MASCH CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-03
AI Technical Summary
In existing high-voltage motor vibration monitoring, the traditional installation method requires waiting for the vibration sensor model to be determined before drilling can be carried out, which leads to production process stagnation. Frequent drilling damages the integrity of the bearing cover. Traditional adapters are heavy and inconvenient to disassemble and assemble, increasing maintenance costs.
Design a single three-section adapter, including a connecting section, a retraction section, and an adapter section. It features an annular retraction groove and multiple blind holes, and is made of aerospace aluminum alloy. By machining the connecting section holes once, it can adapt to sensors of different specifications. Combined with a conical washer, it can achieve fine-tuning of the angle, disperse thread stress, and avoid structural fatigue.
It achieves compatibility with vibration sensors of different specifications, avoids production process stagnation and repeated processing of bearing covers, reduces maintenance costs, and improves the stability of the connection and the adaptability of the sensor.
Smart Images
Figure CN224459502U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric motor monitoring technology, specifically a high-voltage electric motor vibration measurement adapter. Background Technology
[0002] In high-voltage motor vibration monitoring, vibration sensors are crucial for acquiring motor vibration data and ensuring stable and safe motor operation. Vibration sensors need to be installed on the outer cover of the motor bearing to collect vibration data. Currently, the conventional installation method is to machine a corresponding threaded blind hole on the bearing outer cover based on the selected vibration sensor's interface thread specification, such as M6, M8, or M10, and then directly screw the vibration sensor into this hole. This method has the following drawbacks:
[0003] 1. The drilling of the bearing cover can only be carried out after the vibration sensor model is determined, which causes the production process to stop and prolongs the motor manufacturing cycle.
[0004] 2. When replacing vibration sensors with different interface specifications, it is necessary to repeatedly drill holes in the bearing cover. Frequent processing damages the integrity of the bearing cover, reduces its structural strength, and affects the reliability of motor operation.
[0005] 3. Traditional steel adapters are heavy, inconvenient to disassemble and assemble, and repeated disassembly and assembly can easily lead to stripped threads or loosening, increasing maintenance costs. Utility Model Content
[0006] To address the shortcomings of existing technologies, this utility model provides a high-voltage motor vibration measurement adapter, which solves the problems mentioned in the background.
[0007] This utility model provides the following technical solution: a high-voltage motor vibration measurement adapter, comprising: a single three-section structure adapter installed in the vibration measurement hole of the bearing outer cover;
[0008] The adapter includes a connecting section, a retracting section, and an adapter section that are coaxially integrally formed in sequence.
[0009] The retraction section is located between the connecting section and the adapter section. The end face of the connecting section, the outer peripheral surface of the retraction section, and the end face of the adapter section together form an annular retraction groove.
[0010] The adapter section has three blind holes on its end face. The centers of the three blind holes are located on the same circumference with the axis of the adapter section as the center, and the angle between the line connecting the center of two adjacent blind holes and the axis of the adapter section is 120°. The nominal diameter and pitch combination of the three blind holes are 6mm×1.5mm, 8mm×1.5mm and 10mm×1.5mm, respectively, and the depth of the three blind holes is 15mm.
[0011] Preferably, the connecting section is provided with an external thread with a nominal diameter of 10mm and a pitch of 1.5mm, the end face of the connecting section is provided with a chamfer of 1.2×45°, and the length of the connecting section is 15mm.
[0012] Preferably, the blind hole opening of the adapter section is provided with a chamfer of 0.8×45°, and the bottom of the blind hole is provided with a 120° conical countersunk hole.
[0013] Preferably, the end face of the connecting section is the assembly reference surface, the external thread of the connecting section is screwed into the vibration measuring hole of the bearing outer cover, and the end face of the connecting section is flush with the end face of the bearing outer cover, so that the screwing depth error of the external thread of the connecting section is ≤0.5mm.
[0014] Preferably, it also includes a detachable 5° conical washer, and the conical washer is installed between the retracting section and the bearing cover.
[0015] Preferably, the adapter is made of aerospace aluminum alloy, and its surface is treated with a corrosion-resistant coating.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. This high-voltage motor vibration measurement adapter, by setting a connecting section, a retraction section, an adapter section, an annular retraction groove, and blind holes, and three blind holes evenly distributed on the end face of the adapter section, achieves compatibility with three vibration sensor interfaces with a single adapter, which can adapt to different specifications of vibration sensor models, avoid production process stagnation and extend the motor manufacturing cycle. At the same time, the connecting section connects to the bearing cover, and only the vibration measurement hole for installing the connecting section needs to be pre-machined on the bearing cover, avoiding repeated machining of the bearing cover, preventing damage to the integrity of the bearing cover and reduction of structural strength. The assembly datum that makes the end face of the connecting section flush with the end face of the bearing cover eliminates the deviation of the thread screwing depth and solves the risk of thread stripping and loosening caused by frequent disassembly and assembly.
[0018] 2. This high-voltage motor vibration measurement adapter uses an annular relief groove formed by the end face of the connecting section, the outer circumference of the relief section, and the end face of the adapter section to disperse the thread assembly stress and solve the structural fatigue problem caused by repeated disassembly and assembly. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the bearing outer cover structure;
[0020] Figure 2 This is a schematic diagram of the vibration measurement hole structure;
[0021] Figure 3 This is a schematic diagram of the structure at the blind hole location of this utility model;
[0022] Figure 4 This is a side sectional view of the present invention.
[0023] In the diagram: 1. Bearing cover; 2. Vibration measuring hole; 31. Connecting section; 32. Retraction section; 33. Adaptor section; 34. Annular retraction groove; 4. Blind hole. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 3-4 A high-voltage motor vibration measurement adapter includes: a single three-section structure adapter installed in the vibration measurement hole 2 of the bearing outer cover 1. The adapter includes a connecting section 31, a retraction section 32, and an adapter section 33, which are coaxially integrally formed in sequence. The retraction section 32 is located between the connecting section 31 and the adapter section 33. The end face of the connecting section 31, the outer peripheral surface of the retraction section 32, and the end face of the adapter section 33 together form an annular retraction groove 34. Three blind holes 4 are provided on the end face of the adapter section 33. The centers of the three blind holes 4 are located on the same circumference with the axis of the adapter section 33 as the center, and the angle between the line connecting the center of two adjacent blind holes 4 and the axis of the adapter section 33 is 120°. The nominal diameter and pitch combination of the three blind holes 4 are 6mm×1.5mm, 8mm×1.5mm, and 10mm×1.5mm, respectively. The depth of the three blind holes 4 is 15mm.
[0026] like Figure 4 As shown, the connecting section 31 is provided with an external thread with a nominal diameter of 10mm and a pitch of 1.5mm. The end face of the connecting section 31 is provided with a chamfer of 1.2×45°. The length of the connecting section 31 is 15mm.
[0027] The blind hole 4 of the adapter section 33 has a chamfer of 0.8×45° at the opening and a 120° conical countersunk hole at the bottom.
[0028] The end face of the connecting section 31 is the assembly reference surface. The external thread of the connecting section 31 is screwed into the vibration measuring hole 2 of the bearing outer cover 1. The end face of the connecting section 31 is flush with the end face of the bearing outer cover 1, so that the screwing depth error of the external thread of the connecting section 31 is ≤0.5mm.
[0029] It also includes a removable 5° conical washer, which is installed between the retracting section 32 and the bearing outer cover 1.
[0030] The adapter is made of aerospace-grade aluminum alloy, and its surface is treated with a corrosion-resistant coating.
[0031] Please see Figure 1-2 A uniform M10×1.5 vibration measurement hole 2 is pre-machined on the outer cover 1 of the bearing, and the depth of the vibration measurement hole 2 is 15mm;
[0032] Please see Figure 3-4 The adapter 3 is a single-unit three-section structure. The connecting section 31 has an external thread of M10×1.5-15mm. The end face of the connecting section 31 has a chamfer of 1.2×45° to facilitate screwing into the vibration measuring hole 2 of the bearing outer cover 1. The length of the connecting section 31 is 15mm, which matches the depth of the vibration measuring hole 2 of 15mm to ensure vibration resistance and prevent loosening. The connecting section 31 and the adapter section 33 are connected by the retraction section 32. The end face of the connecting section 31, the outer peripheral surface of the retraction section 32, and the end face of the adapter section 33 together form an annular retraction groove 34. The function of the annular retraction groove 34 is to clean the root, release stress, and position the assembly, specifically for root cleaning. During turning, burrs are removed from the thread end of connecting section 31 to ensure thread integrity. Stress relief is achieved by dispersing the connection stress between connecting section 31 and adapter section 33 through a groove structure, improving overall fatigue resistance. Assembly positioning is achieved by using the end face of connecting section 31 of the annular relief groove 34 as the assembly reference surface. The external thread of connecting section 31 is screwed into the vibration measuring hole 2 of bearing outer cover 1, with the end face of connecting section 31 flush with the end face of bearing outer cover 1. This ensures that the screwing depth error of the external thread of connecting section 31 is ≤0.5mm, facilitating batch assembly. The machining is completed in one turn, ensuring that the coaxiality of connecting section 31 and adapter section 33 is ≤0.02mm, avoiding issues caused by misalignment. Additional vibration caused by the heart; the adapter section 33 is the connection part of the vibration sensor, which adopts a multi-interface integrated design. Three blind holes 4 are evenly distributed at 120° on the same circumference: M6×1.5, 15mm deep, M8×1.5, 15mm deep, and M10×1.5, 15mm deep. The centers of the three blind holes 4 are located on the same circumference with the axis of the adapter section 33 as the center, and the angle between the line connecting the center of two adjacent blind holes 4 and the axis of the adapter section 33 is 120°. The 120° even distribution design can ensure that the force on each interface is uniform and avoid mutual interference during the installation of vibration sensors. The opening of the blind hole 4 is chamfered at 0.8×45°, and the bottom of the hole is tapered at 120°. The countersunk hole is used to remove chips and avoid poor thread fit caused by iron filings. The connecting section 31 is screwed into the vibration measuring hole 2 drilled in the bearing outer cover 1. The corresponding thread hole of the matching section 33 is selected according to the specifications of the vibration sensor and screwed in directly. If the vibration sensor cable route needs to be adjusted, a 5° conical washer can be installed between the retracting section 32 and the bearing cover. The ±5° angle can be finely adjusted by rotating the adapter 3 to avoid stress on the cable. The adapter 3 is made of aviation aluminum alloy and the surface of the adapter 3 is treated with corrosion resistant coating. The specific model selected is LY12-CZ aluminum round bar with a diameter of 32mm, which is significantly lighter than the traditional 35# steel.
[0033] The connector is threaded to the vibration measuring hole 2 via the connecting section 31, ensuring a secure connection with the bearing cover 1 and preventing loosening or detachment during motor operation. This achieves a universal connection with the bearing cover 1. The blind hole 4 on the adapter end is customized to the diameter of different vibration sensor connectors to ensure precise matching and depth fit, providing a tight and reliable connection. The adapter end is a key component for achieving universality, featuring diverse designs to accommodate various vibration sensor connector sizes. The adapter specifications are determined based on the vibration sensor connector size. LY12-adapter section 33Z aluminum round bar is selected as the base material. This material boasts high strength, excellent machinability, and dimensional stability, meeting the requirements of complex operating conditions and resisting long-term motor vibration loads without deformation or breakage. After machining, the adapter is coated with Dacromet coating, which is corrosion-resistant. With excellent performance in terms of stability, weather resistance, and chemical resistance, it can effectively resist the corrosion of the adapter by harsh environments such as humidity and acid and alkali, extending its service life. First, screw the connecting end of the vibration measurement adapter into the threaded hole of the bearing outer cover 1, and then insert the vibration sensor connector into the corresponding interface of the adapter end. After installation, the vibration measurement adapter can be used with the vibration sensor to perform relevant vibration measurement work. The three blind holes 4 evenly distributed on the end face of the adapter section 33 enable a single adapter 3 to be compatible with three types of vibration sensor interfaces, which can adapt to different specifications of vibration sensor models, avoiding production process stagnation and extending the motor manufacturing cycle. At the same time, the bearing outer cover 1 is connected through the connecting section 31. Only the vibration measurement hole 2 for installing the connecting section 31 needs to be pre-machined on the bearing outer cover 1, avoiding repeated machining of the bearing outer cover 1, preventing damage to the integrity of the bearing outer cover 1 and reduction of structural strength. The assembly datum of the end face of the connecting section 31 being flush with the end face of the bearing outer cover 1 eliminates the deviation of the thread screwing depth and solves the risk of thread stripping and loosening caused by frequent disassembly and assembly.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high voltage motor vibration measuring adapter, comprising: include: A single three-section structure adapter installed in the vibration measuring hole (2) of the bearing outer cover (1); The adapter includes a connecting section (31), a retracting section (32), and an adapter section (33) that are coaxially integrally formed in sequence; The retraction section (32) is located between the connecting section (31) and the adapter section (33). The end face of the connecting section (31), the outer peripheral surface of the retraction section (32) and the end face of the adapter section (33) together form an annular retraction groove (34). The adapter section (33) has three blind holes (4) on its end face. The centers of the three blind holes (4) are located on the same circumference with the axis of the adapter section (33) as the center. The angle between the line connecting the center of two adjacent blind holes (4) and the axis of the adapter section (33) is 120°. The nominal diameter and pitch combination of the three blind holes (4) are 6mm×1.5mm, 8mm×1.5mm and 10mm×1.5mm respectively. The depth of the three blind holes (4) is 15mm.
2. A high voltage motor vibration measuring adapter according to claim 1, characterized in that The connecting section (31) is provided with an external thread with a nominal diameter of 10 mm and a pitch of 1.5 mm. The end face of the connecting section (31) is provided with a chamfer of 1.2 × 45°. The length of the connecting section (31) is 15 mm.
3. The high-voltage motor vibration measurement adapter according to claim 1, characterized in that, The blind hole (4) of the adapter section (33) has a chamfer of 0.8×45° at the opening and a 120° conical countersunk hole at the bottom of the blind hole (4).
4. A high voltage motor vibration measuring adapter according to claim 1, characterized in that, The end face of the connecting section (31) is the assembly reference surface. The external thread of the connecting section (31) is screwed into the vibration measuring hole (2) of the bearing outer cover (1). The end face of the connecting section (31) is flush with the end face of the bearing outer cover (1), so that the screwing depth error of the external thread of the connecting section (31) is ≤0.5mm.
5. A high voltage motor vibration measuring adapter according to claim 1, wherein It also includes a removable 5° conical washer, which is installed between the retracting section (32) and the bearing cover (1).
6. A high voltage motor vibration measuring adapter according to claim 1, characterized in that The adapter is made of aerospace-grade aluminum alloy, and its surface is treated with a corrosion-resistant coating.