A prototype control system for compressor compatibility testing

Abstract

This invention discloses a sleeve prototype for compressor compatibility testing, comprising an electronic control device, a drive mechanism, a support base, a pressure rod, a U-shaped groove, and a pair of baffles. The U-shaped groove is laterally positioned on the inner bottom surface of the support base. Several track grooves are provided on the two walls of the U-shaped groove, and several locking slots are provided on the side walls of the support base, each corresponding to a track groove. The pressure rod, a metal mandrel with a diameter not exceeding 10 mm, is positioned directly above the U-shaped groove. The baffles are fixed at both ends to the support base, each baffle positioned above one side wall of the U-shaped groove, forming a gap between them. The electronic control device controls the drive mechanism to drive the pressure rod downwards, pressing down on the sleeve to bend it 180°. This invention automates the sleeve bending process, improving sample preparation efficiency, resulting in samples with good consistency, meeting accuracy requirements, and reducing test result errors caused by sample preparation errors.

Description

Technical Field

[0001] This invention relates to a prototype of a control system for compressor compatibility testing. Background Technology

[0002] A bushing is a tubular insulating material used in compressors, primarily to provide electrical protection for the compressor motor leads and their connection points. It is typically made of materials such as polyester film or polyester filament. The motor leads extend from inside the motor's enameled coil and connect to the terminals to maintain electrical continuity between the terminals and the motor. The bushing wraps around the exposed motor leads, providing insulation to prevent short circuits and other faults, ensuring electrical safety within the compressor housing.

[0003] According to Clause CC of Appendix CC of the compressor safety standard IEC 60335-2-34:2021, internal insulation materials such as bushings in compressors need to undergo compatibility testing to verify their safety performance in actual working scenarios. Before the test, a copper conductor with a diameter approximately equal to the inner diameter of the bushing is inserted into the bushing. The bushing and copper conductor are then bent 180° around a mandrel with a diameter not exceeding 10mm, and then inserted into a designated instrument for an electrical strength test. Currently, in this industry, the preparation of these samples is mostly done manually by bending them. The drawbacks of this method are: low efficiency, high labor costs, and inconsistent sample quality among different operators, which may affect the test results. Summary of the Invention

[0004] The purpose of this invention is to provide a tubular sample preparation machine for compressor compatibility testing that is simple in structure, low in cost, easy to operate, ensures good sample consistency, meets accuracy requirements, and improves sample preparation efficiency.

[0005] The objective of this invention is achieved through the following technical measures: a sleeve prototype for compressor compatibility testing, characterized in that it includes an electronic control device, a drive mechanism, a groove-shaped support base, a pressure rod, a U-shaped groove adapted to the pressure rod, and a pair of baffles for pressing down on both sides of the sleeve during the downward pressing of the pressure rod. The U-shaped groove is arranged laterally on the inner bottom surface of the support base. Several track grooves are provided on the two groove walls of the U-shaped groove, and several locking grooves are provided on the two side walls of the support base. The locking grooves and track grooves are paired to position several sleeves containing copper conductors. The pressure rod is liftable and arranged laterally in the support base. The pressure rod is a metal mandrel with a diameter not exceeding 10 mm and is located directly above the U-shaped groove. The two ends of the baffles are fixed to the two ends of the support base, and each baffle is located above one side wall of the U-shaped groove, forming a gap between them. The electronic control device controls the drive mechanism to drive the pressure rod downward to press down on the part of the sleeve located at the opening of the U-shaped groove, bending it 180° to form a shape.

[0006] This invention automates the process of sleeve bending, reducing labor costs compared to traditional manual sample preparation methods. It can also prepare multiple samples at once, and all samples meet the requirements for samples in Appendix CC of the compressor safety standard IEC 60335-2-34:2021. This improves sample preparation efficiency, enables rapid and automated sample preparation, and the prepared samples have good consistency, meeting accuracy requirements and reducing test result errors caused by sample preparation errors.

[0007] The driving mechanism of the present invention includes a pair of servo motors respectively disposed at both ends of the support base, a pair of lead screws disposed longitudinally, and two pairs of support arms disposed vertically. The servo motors are located on one side of the support base. One end of each lead screw is connected to the power output shaft of the servo motor, and the other end is rotatable and installed in a frame groove on the inner wall of the other side of the support base. The upper ends of the two pairs of support arms are threadedly engaged with the two lead screws respectively, and the lower ends are respectively hinged to both ends of the pressure rod.

[0008] The present invention has pins installed at both ends of the pressure rod, and the lower end of each pair of support arms is hinged to a pin. Guide grooves extending vertically are provided on both ends of the support base, and the pins are slidably installed in the guide grooves.

[0009] The electronic control device of the present invention includes a controller, an upper position sensor for sensing the pressure rod rising to the upper limit position, and a lower position sensor for sensing the pressure rod falling to the lower limit position. The upper position sensor is located on the upper part of the inner wall of the U-shaped groove, and the lower position sensor is located on the bottom of the inner wall of the U-shaped groove. The controller is connected to the upper position sensor, the lower position sensor, and the servo motor respectively.

[0010] The present invention provides a pair of elongated through holes extending vertically on the front end face of the support base. The sleeve tube sample machine includes a push rod and a lifting rod, both of which are U-shaped rods. The lifting rod is located above the push rod, and the U-shaped parts of the two are connected by a spring. The pair of rods of the push rod and the lifting rod extend into the support base through the through holes. The pair of rods of the lifting rod are telescopic, and the ends of the rods are hinged to the outer walls of the two sides of the U-shaped groove. The pair of rods of the push rod are placed on the front end of the top edge of the two sides of the U-shaped groove. A sample collection hole communicating with the outside is provided at the bottom of the rear end face of the support base. The push rod pushes the formed sample lifted by the lifting rod out of the U-shaped groove so that it falls into the sample collection hole for collection.

[0011] The width of the U-shaped groove described in this invention is 16-18 mm.

[0012] The side wall of the U-shaped groove of the present invention is located directly below the corresponding baffle, and the gap is 11±0.5mm.

[0013] Compared with the prior art, the present invention has the following significant effects:

[0014] (1) This invention automates the process of sleeve bending, which reduces labor costs compared to traditional manual sample preparation methods. It can also prepare multiple samples at once, and all the obtained samples meet the requirements for samples in Appendix CC of the compressor safety standard IEC 60335-2-34:2021. This improves sample preparation efficiency, realizes rapid and automated sample preparation, and the prepared samples have good consistency, meet the accuracy requirements, and reduce the error in test results caused by sample preparation errors.

[0015] (2) The present invention adopts a transmission structure of motor, lead screw and support arm to control the up and down movement of pressure rod, and controls the direction of motor rotation through sensor and built-in electronic circuit to realize the automation of bending of sleeve sample.

[0016] (3) The U-shaped groove and the upper and lower position sensors of the present invention can ensure that the bending degree of each sample meets the requirements of the standard during the pressing process of the pressure rod, and that there is good consistency between the samples. During the test, the influence of sample differences on the test results can be reduced, and the reliability of the test results can be improved.

[0017] (4) The present invention uses a push rod to push out the sample and collect it uniformly from below the equipment, which improves the collection efficiency and avoids the risk of the operator being crushed when obtaining the sample.

[0018] (5) This invention has a simple structure, low cost, and strong practicality, making it suitable for widespread promotion and use. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the assembly structure of the U-shaped groove, baffle, push rod and lifting rod of the present invention.

[0022] In the diagram: 1-Slot, 2-Railway groove, 3-U-shaped groove, 4-Pressure rod, 5-Pin, 6-Screw rod, 7-Support arm, 8-Nut, 9-Frame groove, 10-Servo motor, 11-Guide groove, 12-Through hole, 13-Lifting rod, 14-Push rod, 15-Sample collection hole, 16-Upper position sensor, 17-Lower position sensor, 18-Control button, 19-Spring, 20-Support base, 21-Feet, 22-Baffle, 23-Gap, 24-Hinge point. Detailed Implementation

[0023] The present invention will be further described below through specific embodiments, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not depart from the basic idea of ​​the present invention, they are all within the protection scope of the present invention.

[0024] like Figure 1 and Figure 2 The image shows a prototype of a sleeve for compressor compatibility testing according to the present invention. It includes an electrical control device, a drive mechanism, a groove-shaped support base 20, a pressure rod 4, a U-shaped groove 3 adapted to the pressure rod 4, and a pair of baffles 22 for pressing down on both sides of the sleeve during the downward pressing of the pressure rod 4. The support base 20 is rectangular, with legs 21 on its bottom surface. The U-shaped groove 3 is horizontally (X-direction) positioned on the inner bottom surface of the support base 20. The U-shaped groove 3 shapes the sleeve and its internal copper conductor after a 180° bend. Six track grooves 2 are provided on each of the two walls of the U-shaped groove 3, and six retaining slots 1 are provided on each of the two side walls of the support base 20. The retaining slots 1 and track grooves 2 correspond one-to-one, and together they fix the sleeve and internal copper conductor to prevent displacement during bending. The pressure rod 4 is liftable and horizontally positioned within the support base 20. The pressure rod 4 is a metal core rod with a diameter not exceeding 10mm and is located directly above the U-shaped groove 3. The width of the U-shaped groove 3 is 1.6–18 mm. The two ends of the baffle 22 are fixed to the two ends of the support base 20, and each baffle 22 is located directly above one side wall of the U-shaped groove 3, forming a gap 23 between them, which is 11 ± 0.5 mm. The electrical control device controls the drive mechanism to drive the pressure rod 4 downward to press down the sleeve located at the opening of the U-shaped groove, causing it to bend 180° and form the shape.

[0025] In this embodiment, the drive mechanism includes a pair of servo motors 10 respectively disposed at both ends of the support base 20, a pair of lead screws 6 disposed longitudinally (Y direction), and two pairs of support arms 7 disposed vertically (Z direction). The servo motors 10 are located on one side of the support base 20. One end of the lead screw 6 is connected to the power output shaft of the servo motor 10, and the other end is rotatable and installed in the bracket groove 9 on the inner wall of the other side of the support base 20. The bracket groove 9 allows the lead screw 6 to rotate under the action of the servo motor 10 without displacement of position. Each pair of support arms 7 is composed of a pair of rigid materials on the left and right. The upper ends of the two pairs of support arms 7 are threadedly engaged with the two lead screws 6 by nuts 8, and the lower ends are respectively hinged to the pins 5 at both ends of the pressure rod 4. Guide grooves 11 extending vertically are provided on both ends of the support base 20, and the pins 5 are slidably installed in the guide grooves 11.

[0026] A pair of elongated through holes 12 extending vertically are provided on the front end face of the support base 20. The sleeve sample includes a push rod 14 and a lifting rod 13, both of which are U-shaped rods. The push rod 14 is located above the lifting rod 13 and the U-shaped parts of the two are connected by a spring 19. The pair of rods of the push rod 14 and the lifting rod 13 extend into the support base 20 through the through holes 12. The pair of rods of the lifting rod 13 are telescopic (sleeve type) and the ends of the rods are hinged (hinge point 24) on the outer walls of both sides of the U-shaped groove 3. The pair of rods of the push rod 14 are placed on the front end of the top edge of the two side walls of the U-shaped groove and are located in the gap 23. A sample collection hole 15 communicating with the outside is provided at the bottom of the rear end face of the support base 20. The push rod 14 pushes the completed sample lifted by the lifting rod 13 out of the U-shaped groove 3 and causes the sample to fall from the sample collection hole 15 for collection.

[0027] The electronic control device includes a controller, an upper position sensor 16 for sensing the pressure rod 4 rising to the upper limit position, and a lower position sensor 17 for sensing the pressure rod 4 falling to the lower limit position. The upper position sensor 16 is located on the upper part of the inner wall of the U-shaped groove 3, and the lower position sensor 17 is located on the bottom of the inner wall of the U-shaped groove 3. The controller is connected to the upper position sensor 16, the lower position sensor 17, and the servo motor 10 respectively.

[0028] The working process of this invention is as follows:

[0029] The sample to be bent is precisely inserted into the predetermined position between the slot 1 and the track slot 2 of the sample preparation machine to ensure accurate positioning and clamping of the sample. Pressing the control button 18 on the controller (which can control the start, stop, reset, forward and reverse rotation of the servo motor 10) starts the servo motors 10 on both sides of the sample preparation machine. The servo motors 10 drive the lead screw 6 to rotate, and the lead screw 6 drives the nut 8 to move relative to each other along the axis of the lead screw 6. The support arm 7 connected to the nut 8 presses down the pin 5 and the pressure rod 4 connected to it. Under the action of the guide groove 11, the two ends of the pressure rod 4 move downward synchronously. The downward movement of the pressure rod 4 folds the sample in the U-shaped groove into shape by 180°. The pair of baffles 22 press down on both sides of the sample during the downward pressing of the pressure rod 4 to prevent the sample from tilting. When the pressure rod 4 moves to the predetermined position detected by the lower position sensor 17, the servo motor 10 will reverse, driving the pressure rod 4 to rise. The rising action continues until the pressure rod 4 reaches the predetermined position detected by the upper position sensor 16. At this point, the pressure rod 4 stops moving, completing the sample bending operation. Subsequently, the U-shaped part of the lifting rod 13 is lifted from the outside of the sample preparation machine. The rod of the lifting rod 13 lifts the bent sleeve and copper conductor out of the track groove 2 of the U-shaped groove 3, pushing the push rod 14 and the lifting rod 13. The lifting rod 13 retracts, and at the same time, the push rod 14 pushes the sample out to the sample collection hole 15, realizing sample collection.

[0030] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A prototype tubular casing for compressor compatibility testing, characterized in that: It includes an electronic control device, a drive mechanism, a grooved support base, a pressure rod, a U-shaped groove adapted to the pressure rod, and a pair of baffles for pressing down on both sides of the sleeve during the downward pressing of the pressure rod. The U-shaped groove is arranged laterally on the inner bottom surface of the support base. Several track grooves are provided on the two walls of the U-shaped groove, and several locking slots are provided on the two side walls of the support base. The locking slots and track grooves are paired to position several sleeves containing copper conductors. The pressure rod is liftable and laterally arranged within the support base, and the diameter of the pressure rod does not exceed 10mm. The metal mandrel is positioned directly above the U-shaped groove. The two ends of the baffle are fixed to the two ends of the support base, with each baffle positioned above one side of the U-shaped groove wall, forming a gap between them. The electronic control device controls the drive mechanism to drive the pressure rod downwards, pressing the sleeve at the opening of the U-shaped groove to bend it 180°. The drive mechanism includes a pair of servo motors respectively positioned at both ends of the support base, a pair of lead screws arranged longitudinally, and two pairs of support arms arranged vertically. The servo motors are located on one side of the support base. One end of each lead screw is connected to the power output shaft of the servo motor, and the other end is rotatable and installed in a slot on the inner wall of the other side of the support base. The upper ends of the two pairs of support arms are respectively... The two lead screws are threaded together, and their lower ends are respectively hinged to the two ends of the pressure rod. A pair of elongated through holes extending vertically are provided on the front end face of the support base. The sleeve sample machine includes a push rod and a lifting rod, both of which are U-shaped rods. The lifting rod is located above the push rod, and the U-shaped parts of the two are connected by a spring. A pair of rods of the push rod and the lifting rod extend into the support base through the through holes. The pair of rods of the lifting rod are telescopic, and the ends of the rods are hinged to the outer walls of the two sides of the U-shaped groove. The pair of rods of the push rod are placed on the front end of the top edge of the two sides of the U-shaped groove. A sample collection hole communicating with the outside is provided at the bottom of the rear end face of the support base. The push rod pushes the formed sample lifted by the lifting rod out of the U-shaped groove so that it falls into the sample collection hole for collection.

2. The prototype tubing for compressor compatibility testing according to claim 1, characterized in that: Pins are installed at both ends of the pressure rod, and the lower end of each pair of support arms is hinged to a pin. Guide grooves extending vertically are provided on both ends of the support base, and the pins are slidably installed in the guide grooves.

3. The prototype tubing for compressor compatibility testing according to claim 2, characterized in that: The electronic control device includes a controller, an upper position sensor for sensing the pressure bar rising to the upper limit position, and a lower position sensor for sensing the pressure bar falling to the lower limit position. The upper position sensor is located on the upper part of the inner wall of the U-shaped groove, and the lower position sensor is located on the bottom of the inner wall of the U-shaped groove. The controller is connected to the upper position sensor, the lower position sensor, and the servo motor.

4. The prototype tubing for compressor compatibility testing according to claim 3, characterized in that: The width of the U-shaped groove is 16-18 mm.

5. The prototype tubing for compressor compatibility testing according to claim 4, characterized in that: One side wall of the U-shaped groove is located directly below the corresponding baffle, and the gap is 11±0.5mm.

Images