Automatic ventilation device for static characteristic test of linear motor

Abstract

The present application relates to the technical field of motor test device, and specifically relates to an automatic ventilation device for static characteristic test of a linear motor, which comprises a lifting platform, a fan module connected to the lifting platform, a control module and a hoisting module. The fan module comprises a centrifugal fan and a ventilation pipeline connected to the centrifugal fan. A wind volume measuring device is arranged on the ventilation pipeline close to an air outlet. An adjustable air deflector is arranged at the air outlet of the ventilation pipeline. The air deflector is used to adjust the air volume of the air outlet. The hoisting module is used to hoist the whole ventilation device to the side of the primary and secondary of the linear motor. The height of the centrifugal fan is adjusted by the lifting platform so that the height of the air outlet of the ventilation pipeline is the same as that of the secondary. The wind volume is measured by the wind volume measuring device. The wind volume is adjusted by the control cabinet. The automatic ventilation device has high integration, uniform and controllable cooling air volume, and can improve the test efficiency and the accuracy of the test results.

Description

Technical Field

[0001] This invention relates to the field of motor testing equipment technology, and specifically provides an automatic ventilation device for static characteristic testing of linear motors. Background Technology

[0002] During the static characteristic test of a linear motor, the secondary conductor generates a large amount of Joule heat under the action of the excitation current, which will cause the secondary temperature to rise rapidly. The rise in secondary temperature will significantly affect the electromagnetic performance of the motor. Specifically, under the same voltage conditions, as the temperature rises, the current decreases and the thrust decreases accordingly. Therefore, the control accuracy of the secondary temperature directly determines the accuracy and repeatability of the static characteristic test results.

[0003] Currently, the cooling methods used in static characteristic tests of linear motors have the following main technical defects: 1. Lack of active cooling measures: Due to the small air gap between the secondary and primary stages, existing test methods usually do not have a dedicated cooling and ventilation system. They rely solely on shortening the single power-on time to limit the temperature rise. This method cannot fundamentally solve the heat generation problem. Especially under high current or long-term test conditions, the secondary temperature rise is still difficult to suppress effectively.

[0004] 2. Crude cooling method after the test: Some schemes use manual air pipes to blow air to cool the secondary after the test. This method has the following problems: 1) The cooling air volume is uncontrollable and cannot be adjusted according to the actual temperature of the secondary; 2) The cooling is uneven, and the temperature difference between different areas of the secondary is large, which can easily cause local overheating or thermal stress; 3) It is only suitable for cooling after the test and cannot achieve dynamic thermal management during the test.

[0005] 3. Poor adaptability: Existing cooling methods do not take into account the differences in secondary height, air gap size, etc. of different models of linear motors, lack universal adaptability to secondarys of different specifications, and make it difficult to form standardized and repeatable test conditions.

[0006] In summary, the existing technology lacks an automatic ventilation device that can achieve controllable airflow, uniform cooling, and adaptability to different secondary sizes and air gap requirements during and after the static characteristic test of a linear motor, which affects the test efficiency and the accuracy of the test results. Summary of the Invention

[0007] To solve the above problems, the present invention provides an automatic ventilation device for static characteristic testing of linear motors, which can be adapted to secondary motors of different heights and different gaps, and can measure and control the cooling air volume.

[0008] This invention provides an automatic ventilation device for static characteristic testing of a linear motor, comprising a lifting platform and a fan module, a control module, and a hoisting module connected to the lifting platform. The fan module includes a centrifugal fan and a ventilation duct connected to the centrifugal fan. An air volume measuring device is provided on the ventilation duct near the air outlet, and an adjustable air guide plate is provided at the air outlet of the ventilation duct. The air volume at the air outlet is adjusted by the air guide plate. The entire ventilation device is hoisted to the primary and secondary stages of the linear motor by the hoisting module. The height of the centrifugal fan is adjusted by the lifting platform so that the height of the air outlet of the ventilation duct is the same as that of the secondary stage. The air volume is measured by the air volume measuring device, and the air volume is adjusted by the control cabinet.

[0009] Furthermore, the lifting platform includes a base and an upper platform that can be raised and lowered on the base via a lifting assembly; the fan module, hoisting module, and control module are all located on the upper platform.

[0010] Furthermore, the lifting assembly includes a lifting bracket connected between the base and the upper platform, with the upper end of the lifting bracket slidably connected to the lower end of the upper platform and the lower end of the lifting bracket slidably connected to the base.

[0011] Furthermore, a lower sliding groove is provided on the inner end face of the base, and a lower sliding rod is provided at the lower end of the lifting bracket to match the lower sliding groove; an upper sliding groove is provided at the lower side of the upper platform, and an upper sliding rod is provided at the upper end of the lifting bracket to match the upper sliding groove, and the upper end of the lifting bracket is slidably connected to the upper sliding groove through the upper sliding rod.

[0012] Furthermore, the lifting bracket, the lower sliding groove, and the upper sliding groove each include two sets arranged symmetrically; each set of lifting brackets includes two lifting rods arranged in a cross manner, the lifting rods intersecting at the intersection, the lower sliding rod is set on the lower outer wall of the lifting rod, and the upper sliding rod is set on the upper outer wall of the lifting rod.

[0013] Furthermore, in the two sets of lifting brackets, a hinge shaft is connected at the intersection of the lifting rods, and the hinge shaft is set perpendicular to the lower sliding groove and the upper sliding groove.

[0014] Furthermore, the fan module includes a support base located at the upper end of the upper platform, a centrifugal fan supported on the support base and extending to the outside of the upper platform, and a ventilation duct located on the outside of the upper platform.

[0015] Furthermore, the hoisting module includes a lifting ring located at the top of the upper platform; the control module includes a control cabinet located at the top of the upper platform; the control cabinet, lifting ring, and support base are all staggered.

[0016] Furthermore, the control cabinet includes a fan frequency converter, PLC, touch screen, circuit breaker, data acquisition device, Ethernet port, and emergency stop button.

[0017] Furthermore, the air volume measurement device is a differential pressure anemometer. The air volume measurement device measures and outputs the real-time air volume, dynamic pressure data, and static pressure data of the ventilation system in real time based on the cross-sectional parameters of the ventilation duct.

[0018] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. The device in this solution has a compact structure and high integration, making it easy to hoist and install. It can be quickly deployed on different test platforms to meet the flexible use requirements of the test site. The integration and ease of use are significantly improved. At the same time, by setting up a lifting device, this solution can automatically or manually adjust the spatial position of the ventilation mechanism according to the secondary height, so as to achieve effective coverage of secondarys of different sizes, significantly improving the versatility and applicability of the device and achieving secondary height self-adaptation.

[0019] 2. This solution utilizes an air guide plate structure, which can adjust the air outlet angle and effective cross-section of the air outlet according to the actual gap between the secondary and primary stages. This ensures that the cooling airflow is precisely applied to the secondary surface, avoiding airflow loss or ineffective cooling, and achieving differentiated ventilation in the air gap. Furthermore, this device can measure and control the cooling airflow in a closed loop, enabling precise adjustment of the airflow during and after the test. In addition, by optimizing the air duct and air outlet structure, it can ensure uniform distribution of cooling airflow on the secondary surface, avoiding excessive local temperature differences. The airflow in this solution is controllable and uniform.

[0020] 3. This solution can suppress secondary temperature rise in real time during the test and achieve rapid and uniform cooling after the test, which significantly shortens the test cycle and improves the efficiency of static characteristic test. At the same time, after the secondary temperature is effectively controlled, the stability and repeatability of current and thrust data are significantly improved, thereby improving the accuracy and reliability of the test results. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the automatic ventilation device provided in an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the automatic ventilation device provided in an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the lifting platform in an automatic ventilation device provided according to an embodiment of the present invention.

[0022] The attached reference numerals include: 1. Lifting platform; 2. Fan module; 3. Centrifugal fan; 4. Ventilation duct; 5. Air volume measuring device; 6. Air guide plate; 7. Base; 8. Upper platform; 9. Lower sliding groove; 10. Lower sliding rod; 11. Upper sliding rod; 12. Lifting rod; 13. Hinge shaft; 14. Support seat; 15. Lifting ring; 16. Control cabinet; 17. Upper sliding groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the appendix. Figure 1-3 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and do not constitute a limitation thereof.

[0024] An automatic ventilation device for static characteristic testing of a linear motor includes a lifting platform 1 and a fan module 2, a control module, and a hoisting module connected to the lifting platform 1. The fan module 2 includes a centrifugal fan 3 and a ventilation duct 4 connected to the centrifugal fan 3. An air volume measuring device 5 is provided on the ventilation duct 4 near the air outlet. The air volume measuring device 5 is a differential pressure wind speed sensor. The air volume measuring device 5 measures and outputs the real-time air volume, dynamic pressure data, and static pressure data of the ventilation system in real time according to the cross-sectional parameters of the ventilation duct 4. The fan module 2 also includes a support base 14 set on the upper end of the upper platform 8. The centrifugal fan 3 is supported on the support base 14 and extends to the outside of the upper platform 8, and the ventilation duct 4 is located on the outside of the upper platform 8.

[0025] The air outlet of the ventilation duct 4 is equipped with an adjustable air guide plate 6. The air outlet size can be adjusted by the air guide plate 6 to match the linear motors with different gaps. After adjusting the air guide plate 6, the actual size of the air outlet can be measured by measuring the height of the air outlet. Combined with the air volume data collected by the differential pressure anemometer, the average wind speed of the air outlet can be calculated. At the same time, the air guide plate 6 can be designed as a detachable structure according to actual needs, which can be applied to other scenarios. It can be used not only for static characteristic tests of linear motors, but also for the cooling and ventilation needs of other products.

[0026] In this solution, the ventilation device is hoisted to the primary and secondary sides of the linear motor using a hoisting module. The height of the centrifugal fan 3 is adjusted by the lifting platform 1 so that the height of the air outlet of the ventilation duct 4 is the same as that of the secondary side. The air volume is measured by the air volume measuring device 5, and the air volume is adjusted by the control cabinet 16. The closed-loop automatic adjustment of the air volume is achieved by connecting the air volume data with the PLC.

[0027] The lifting platform 1 includes a base 7 and an upper platform 8 that can be raised and lowered on the base 7 via a lifting assembly. The fan module 2, the hoisting module, and the control module are all located on the upper platform 8. The hoisting module includes a lifting ring 15 located at the upper end of the upper platform 8. The lifting ring 15 includes two sets evenly distributed on both sides of the upper platform 8. The control module includes a control cabinet 16 located at the upper end of the upper platform 8. The control cabinet 16 includes a fan frequency converter, PLC, touch screen, circuit breaker, data acquisition device, Ethernet port, and emergency stop button. The control cabinet 16, the lifting ring 15, and the support base 14 are all staggered to form a closed-loop control system with air volume or pressure as the set value. It can automatically adjust the fan frequency according to the set parameters to achieve the linkage closed-loop adjustment of air volume, pressure, and fan speed. At the same time, the lifting platform 1 does not require additional cable adjustment during lifting operations, which facilitates overall hoisting, relocation, and installation.

[0028] The lifting assembly includes a lifting bracket connected between the base 7 and the upper platform 8. The upper end of the lifting bracket is slidably connected to the lower end of the upper platform 8, and the lower end of the lifting bracket is slidably connected to the base 7. A lower sliding groove 9 is provided on the inner end surface of the base 7. A lower sliding rod 10 is provided at the lower end of the lifting bracket and matched with the lower sliding groove 9. An upper sliding groove 17 is provided at the lower end of the side of the upper platform 8. An upper sliding rod 11 is provided at the upper end of the lifting bracket and matched with the upper sliding groove 17. The upper end of the lifting bracket is slidably connected to the upper sliding groove 17 through the upper sliding rod 11.

[0029] The lifting bracket, lower sliding groove 9, and upper sliding groove 17 each include two symmetrically arranged sets. Each set of lifting brackets includes two intersecting lifting rods 12, which intersect at the intersection. The lower sliding rod 10 is located on the lower outer wall of the lifting rod 12, and the upper sliding rod 11 is located on the upper outer wall of the lifting rod 12. In the two sets of lifting brackets, a hinge shaft 13 is connected at the intersection of the lifting rods 12. The hinge shaft 13 is perpendicular to the lower sliding groove 9 and the upper sliding groove 17. In this scheme, the height of the air outlet can be freely adjusted by the lifting platform 1, which can meet the secondary cooling requirements of different secondary linear motors and different tooling during static testing.

[0030] When in use, sliding the lifting rod 12 along the corresponding lower sliding groove 9 and upper sliding groove 17 toward the center can increase the height of the upper platform 8, that is, increase the height of the fan module 2. When sliding the lifting rod 12 along the corresponding lower sliding groove 9 and upper sliding groove 17 toward the outside can decrease the height of the upper platform 8, that is, decrease the height of the fan module 2. The specific operation should be carried out according to the actual needs.

[0031] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0032] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An automatic ventilation device for static characteristic testing of a linear motor, characterized in that, The device includes a lifting platform (1) and a fan module (2), a control module, and a hoisting module connected to the lifting platform (1). The fan module (2) includes a centrifugal fan (3) and a ventilation duct (4) connected to the centrifugal fan (3). An air volume measuring device (5) is provided on the ventilation duct (4) near the air outlet, and an adjustable air guide plate (6) is provided at the air outlet of the ventilation duct (4). The air volume of the air outlet is adjusted by the air guide plate (6). The ventilation device is hoisted to the primary and secondary sides of the linear motor by the hoisting module. The height of the centrifugal fan (3) is adjusted by the lifting platform (1) so that the height of the air outlet of the ventilation duct (4) is the same as that of the secondary side. The air volume is measured by the air volume measuring device (5). The air volume is adjusted by the control cabinet (16).

2. The automatic ventilation device for static characteristic testing of a linear motor according to claim 1, characterized in that, The lifting platform (1) includes a base (7) and an upper platform (8) that can be lifted and lowered on the base (7) by means of a lifting assembly; the fan module (2), the hoisting module and the control module are all located on the upper platform (8).

3. The automatic ventilation device for static characteristic testing of a linear motor according to claim 2, characterized in that, The lifting assembly includes a lifting bracket connected between the base (7) and the upper platform (8), with the upper end of the lifting bracket slidably connected to the lower end of the upper platform (8) and the lower end of the lifting bracket slidably connected to the base (7).

4. The automatic ventilation device for static characteristic testing of a linear motor according to claim 3, characterized in that, The base (7) has a lower sliding groove (9) on its inner end face, and the lower end of the lifting bracket is matched with the lower sliding groove (9) and a lower sliding rod (10) is provided; the lower side of the upper platform (8) has an upper sliding groove (17), and the upper end of the lifting bracket is matched with the upper sliding groove (17) and an upper sliding rod (11) is provided. The upper end of the lifting bracket is slidably connected to the upper sliding groove (17) through the upper sliding rod (11).

5. The automatic ventilation device for static characteristic testing of a linear motor according to claim 4, characterized in that, The lifting bracket, lower sliding groove (9), and upper sliding groove (17) each include two sets symmetrically arranged; each set of lifting brackets includes two lifting rods (12) arranged in a cross manner, the lifting rods (12) intersect at the intersection, the lower sliding rod (10) is set on the lower outer wall of the lifting rod (12), and the upper sliding rod (11) is set on the upper outer wall of the lifting rod (12).

6. The automatic ventilation device for static characteristic testing of a linear motor according to claim 5, characterized in that, In the two sets of lifting brackets, a hinge shaft (13) is connected at the intersection of the lifting rod (12), and the hinge shaft (13) is set perpendicularly to the lower sliding groove (9) and the upper sliding groove (17).

7. The automatic ventilation device for static characteristic testing of a linear motor according to claim 6, characterized in that, The fan module (2) includes a support base (14) set on the upper end of the upper platform (8), a centrifugal fan (3) is supported on the support base (14) and extends to the outside of the upper platform (8), and the ventilation duct (4) is located outside the upper platform (8).

8. The automatic ventilation device for static characteristic testing of a linear motor according to claim 7, characterized in that, The hoisting module includes a lifting ring (15) located at the upper end of the upper platform (8); the control module includes a control cabinet (16) located at the upper end of the upper platform (8); the control cabinet (16), the lifting ring (15), and the support base (14) are all staggered.

9. The automatic ventilation device for static characteristic testing of a linear motor according to claim 8, characterized in that, The control cabinet (16) includes a fan frequency converter, PLC, touch screen, circuit breaker, data acquisition device, Ethernet port, and emergency stop button.

10. The automatic ventilation device for static characteristic testing of a linear motor according to claim 9, characterized in that, The air volume measuring device (5) is a differential pressure wind speed sensor. The air volume measuring device (5) measures and outputs the real-time air volume, dynamic pressure data and static pressure data of the ventilation system in real time according to the cross-sectional parameters of the ventilation duct (4).

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