Performance detection device for ultra-low-speed variable frequency motor

Abstract

The utility model relates to a performance detection device for an ultra-low-speed variable frequency motor, which comprises a bottom plate, a plurality of upright posts fixedly connected on the bottom plate, a frame beam fixedly connected at the upper ends of the upright posts, a test platform fixedly connected on the frame beam, a lifting bracket arranged on the right side of the test platform and comprising a lifting plate, and four guide posts fixedly connected at four corners of the lifting plate, the upper ends of the guide columns penetrate through the test platform and are fixedly connected with two groups of hinged support plates respectively, a transmission shaft is inserted between the hinged support plates, two ends of the transmission shaft are connected to the hinged support plates through bearings respectively, the left end of the transmission shaft extends out of the hinged support plates and is fixedly connected with couplings, and the right end of the transmission shaft extends out of the hinged support plates and is fixedly connected with a driving gear; a lead screw nut is inserted and fixed in the middle of the lifting plate, a lead screw is screwed in the lead screw nut, the upper end of the lead screw is pivoted in a bearing seat, and the bearing seat is fixedly connected to the test platform. The device can be used for testing the stability of the ultra-low speed motor in a long-time operation condition, and can also be used for testing the stability of the ultra-low speed motor in a loading condition.

Description

Technical Field

[0001] This utility model relates to the technical field of motor performance testing, and more specifically to a performance testing device for an ultra-low speed variable frequency motor. Background Technology

[0002] Ultra-low speed motors are a special type of electric motor with a rated speed typically below 1000 rpm. Their main characteristic is extremely low operating speed, usually within tens of revolutions per minute. They possess the following features: high efficiency and energy saving, low speed, minimal energy loss during operation, and high energy utilization; smooth operation: low vibration and low noise, suitable for applications requiring high stability; robust structure: using high-strength, wear-resistant materials, capable of withstanding harsh environments. Currently, in addition to conventional motor performance testing, such as electrical performance testing (insulation, withstand voltage, and efficiency) and mechanical performance testing (vibration, noise, and torque), ultra-low speed motors primarily require stability testing. This necessitates testing their stability during long-term low-speed operation, thus requiring the design of a stability testing device suitable for ultra-low speed motors. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a performance testing device for ultra-low speed variable frequency motors. This device can test the stability of ultra-low speed motors under long-term operation and can also perform stability tests of ultra-low speed motors under load.

[0004] A performance testing device for an ultra-low speed variable frequency motor includes a base plate with several columns fixedly attached to it. A horizontal rectangular frame beam is fixedly attached to the upper end of each column, and a horizontal test platform is fixedly attached to the frame beam. A vertical lifting bracket is provided on the right side of the test platform. The lifting bracket includes a rectangular lifting plate located below the frame beam. Four vertical guide columns are fixedly attached to the four corners of the lifting plate. Two sets of longitudinal hinged support plates are fixedly attached to the upper ends of the guide columns through the test platform. A transverse transmission shaft is inserted between the hinged support plates. Both ends of the transmission shaft are connected to the hinged support plates via bearings. A coupling is fixedly attached to the left end of the transmission shaft through a hinged support plate sleeve, and a drive gear is fixedly attached to the right end of the transmission shaft through a hinged support plate sleeve. A lead screw nut is inserted and fixedly connected to the middle of the lifting plate, and a lead screw is screwed into the lead screw nut. The upper end of the lead screw is pivotally connected to a bearing seat, which is fixedly attached to the test platform.

[0005] A circular speed measuring disk is formed on the drive shaft between the hinged support plates. The outer ring of the speed measuring disk is formed with marking holes. A speed sensor is inserted and fixed on the hinged support plate, which is opposite to the marking holes on the speed measuring disk.

[0006] Preferably, a loading assembly is fixedly connected to the hinged support plate on the rear side of the drive gear. The loading assembly includes a T-shaped fixed support, which includes a transverse connecting column. The connecting column is fixed to the hinged support plate, and a limit stop is formed at its right end. A transverse screw is formed on the right end face of the limit stop, and a slot is formed in the middle of the screw. A driven gear is connected to the screw via a bearing. A set of springs and two sets of limit pads are inserted into the screw on the right side of the driven gear. The springs are clamped between the two sets of limit pads. A stop strip is formed in the middle of the limit pad and is inserted into the slot of the screw. The driven gear meshes with the drive gear and is elastically clamped between the limit pads and the limit stop. A loading nut is screwed to the right side of the screw and presses against the limit pad.

[0007] Preferably, wear-resistant pads are inserted into the screws on both sides of the driven gear, and the wear-resistant pads are respectively clamped between the driven gear and the limiting plate and between the driven gear and the limiting pad.

[0008] Preferably, the distance from the marking hole on the drive shaft to the center of the drive shaft is equal to the distance from the speed sensor to the center of the drive shaft.

[0009] Preferably, the lower end of the lead screw is provided with a gap between it and the base plate and is formed with a regular hexagonal limiting head.

[0010] Preferably, the left side of the test platform is formed with several longitudinal mounting slots.

[0011] The beneficial effects of this utility model are as follows:

[0012] This device can test the stability of ultra-low speed motors under long-term operation, and can also perform stability tests on ultra-low speed motors under load. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the formal structure of this utility model;

[0015] Figure 3 This is a top view of the structure of this utility model.

[0016] In the diagram: 1. Base plate; 2. Column; 3. Frame beam; 4. Test platform; 5. Lifting bracket; 6. Speed ​​sensor; 7. Drive shaft; 8. Drive gear; 9. Loading assembly; 10. Coupling; 11. Lead screw nut; 12. Lead screw; 13. Bearing housing. Detailed Implementation

[0017] Example: See Figures 1 to 3As shown, a performance testing device for an ultra-low speed variable frequency motor includes a base plate 1, on which several columns 2 are fixedly connected. A horizontal rectangular frame beam 3 is fixedly connected to the upper end of each column 2. A horizontal test platform 4 is fixedly connected to the frame beam 3. A vertical lifting support 5 is provided on the right side of the test platform 4. The lifting support 5 includes a rectangular lifting plate 53 located below the frame beam 3. Four vertical guide columns 51 are fixedly connected to the four corners of the lifting plate 53. The upper ends of the guide columns 51 pass through the test platform 4 and are respectively fixedly connected to two sets of longitudinal hinges. A transverse drive shaft 7 is inserted between the connecting plate 52 and the hinged plate 52. The two ends of the drive shaft 7 are respectively connected to the hinged plate 52 through bearings. The left end of the drive shaft 7 extends out of the hinged plate 52 and is fixedly connected to the coupling 10 through the insert sleeve. The right end extends out of the hinged plate 52 and is fixedly connected to the drive gear 8 through the insert sleeve. A lead screw nut 11 is inserted and fixed in the middle of the lifting plate 53. A lead screw 12 is screwed into the lead screw nut 11. The upper end of the lead screw 12 is pivotally connected in the bearing seat 13. The bearing seat 13 is fixed on the test platform 4.

[0018] A circular speed measuring disk 71 is formed on the transmission shaft 7 between the hinged support plates 52. The outer ring of the speed measuring disk 71 is formed with a marking hole 72. A speed sensor 6 is inserted and fixed on the hinged support plate 52, which is opposite to the marking hole 72 on the speed measuring disk 71.

[0019] A loading assembly 9 is fixedly connected to the hinged support plate 52 on the rear side of the driving gear 8. The loading assembly 9 includes a T-shaped fixed support 91, which includes a transverse connecting post 911. The connecting post 911 is fixed to the hinged support plate 52, and a limit stop plate 912 is formed at its right end. A transverse screw 913 is formed on the right end face of the limit stop plate 912. A slot 914 is formed in the middle of the screw 913. A driven gear 92 is connected to the screw 913 through a bearing. A set of springs 93 and two sets of limiting pads 94 are inserted into the screw 913 on the right side of the driven gear 92. The springs 93 are clamped between the two sets of limiting pads 94. A stop strip is formed in the middle of plate 94, and the stop strip is inserted into the slot 914 of screw 913; the driven gear 92 meshes with the driving gear 8 and is elastically clamped between the limiting pad 94 and the limiting stop plate 912; a loading nut 95 is screwed to the right side of screw 913, and the loading nut 95 presses against the limiting pad 94. By tightening the loading nut 95, the spring 93 can be compressed. After the spring 93 is compressed, it can increase the pressure on the end face of the driven gear 92, thereby increasing the friction and increasing the damping effect, which is equivalent to loading the transmission shaft 7, thereby detecting the stable operation of the ultra-low speed motor under loading conditions.

[0020] Wear-resistant pads 96 are respectively inserted into the screws 913 on both sides of the driven gear 92. The wear-resistant pads 96 are respectively clamped between the driven gear 92 and the limiting plate 912 and between the driven gear 92 and the limiting pad 94. The wear-resistant pads 96 can reduce wear.

[0021] The center distance from the marking hole 72 on the drive shaft 7 to the center distance from the speed sensor 6 to the center distance from the drive shaft 7 is equal to that from the speed sensor 6 to the center distance from the drive shaft 7.

[0022] The lower end of the lead screw 12 is provided with a gap and a hexagonal limiting head 121 is formed therein. The limiting head 121 is connected by a wrench to realize the rotation of the lead screw 12, thereby adjusting the height of the transmission shaft 7.

[0023] The left side of the test platform 4 has several longitudinal mounting slots 41, which are used to insert bolts of the bolt assembly. The ultra-low speed motor is fixed to the test platform 4 by the bolt assembly.

[0024] Working principle: This structure is a performance testing device for ultra-low speed variable frequency motors. It mainly uses coupling 10 to fix the rotating shaft and transmission shaft 7 of the ultra-low speed variable frequency motor. The ultra-low speed variable frequency motor is fixed on the left side of the test platform 4. When the ultra-low speed variable frequency motor is running, it drives the speed measuring disk 71 to rotate. The speed measuring sensor 6 detects the long-term operation of the speed measuring disk 71 to determine its operational stability.

[0025] Meanwhile, the height of the drive shaft 7 can be adjusted for ultra-low speed variable frequency motors of different sizes to adapt to the height of the ultra-low speed variable frequency motor shaft.

[0026] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A performance testing device for an ultra-low speed variable frequency motor, comprising a base plate (1), several columns (2) fixedly connected to the base plate (1), a horizontal rectangular frame beam (3) fixedly connected to the upper end of the columns (2), a horizontal test platform (4) fixedly connected to the frame beam (3), and a vertical lifting bracket (5) provided on the right side of the test platform (4), characterized in that: The lifting support (5) includes a rectangular lifting plate (53) set on the lower side of the frame beam (3). Four vertical guide columns (51) are fixed at the four corners of the lifting plate (53). The upper ends of the guide columns (51) pass through the test platform (4) and are fixed to two sets of longitudinal hinged support plates (52). A transverse transmission shaft (7) is inserted between the hinged support plates (52). The two ends of the transmission shaft (7) are connected to the hinged support plates (52) through bearings. The left end of the transmission shaft (7) extends out of the hinged support plate (52) and is fixed to the coupling (10). The right end extends out of the hinged support plate (52) and is fixed to the drive gear (8). A screw nut (11) is inserted and fixed in the middle of the lifting plate (53). A screw (12) is screwed into the screw nut (11). The upper end of the screw (12) is pivotally connected in the bearing seat (13). The bearing seat (13) is fixed on the test platform (4). A circular speed measuring disk (71) is formed on the transmission shaft (7) between the hinged support plates (52). A marking hole (72) is formed on the outer ring of the speed measuring disk (71). A speed sensor (6) is inserted and fixed on the hinged support plate (52) and is opposite to the marking hole (72) on the speed measuring disk (71).

2. The performance testing device for an ultra-low speed variable frequency motor according to claim 1, characterized in that: A loading assembly (9) is fixedly connected to the hinged support plate (52) on the rear side of the drive gear (8). The loading assembly (9) includes a T-shaped fixed support (91), which includes a transverse connecting column (911). The connecting column (911) is fixedly connected to the hinged support plate (52), and a limit stop plate (912) is formed at its right end. A transverse screw (913) is formed on the right end face of the limit stop plate (912). A slot (914) is formed in the middle of the screw (913). A driven gear (92) is connected to the screw (913) through a bearing. A set of springs (93) and two sets of limiting pads (94) are inserted on the right screw (913). The springs (93) are clamped between the two sets of limiting pads (94). A stop strip is formed in the middle of the limiting pad (94). The stop strip is inserted into the slot (914) of the screw (913). The driven gear (92) meshes with the driving gear (8) and is elastically clamped between the limiting pad (94) and the limiting stop plate (912). A loading nut (95) is screwed to the right side of the screw (913). The loading nut (95) presses against the limiting pad (94).

3. The performance testing device for an ultra-low speed variable frequency motor according to claim 2, characterized in that: Wear-resistant pads (96) are respectively inserted on the screws (913) on both sides of the driven gear (92). The wear-resistant pads (96) are respectively clamped between the driven gear (92) and the limiting plate (912) and between the driven gear (92) and the limiting pad (94).

4. The performance testing device for an ultra-low speed variable frequency motor according to claim 1, characterized in that: The center distance from the marking hole (72) on the drive shaft (7) to the center distance from the speed sensor (6) to the center distance from the drive shaft (7) is equal to that from the speed sensor (6) to the center distance from the drive shaft (7).

5. The performance testing device for an ultra-low speed variable frequency motor according to claim 1, characterized in that: The lower end of the lead screw (12) is provided with a gap between it and the base plate (1) and is formed with a regular hexagonal limiting head (121).

6. The performance testing device for an ultra-low speed variable frequency motor according to claim 1, characterized in that: The left side of the test platform (4) has several longitudinal mounting slots (41).

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