Coil press-fitting device and press-fitting method

Abstract

The invention relates to the technical field of transformer coil manufacturing, in particular to a coil press-fitting device and a press-fitting method, the coil press-fitting device comprises coil press-fitting, and a middle column type press-fitting tool comprises base frame welding, upper pressing beam welding and a middle column; the coil press fitting and spring mechanism is arranged between the base frame welding device and the upper pressing beam welding device, the coil press fitting and spring mechanism is clamped, the hydraulic control system is arranged on the top face of the upper pressing beam welding device for press fitting, the middle column is sleeved with the nut nesting device, and the middle column type press fitting tool is fastened. A coil to be pressed is arranged between the two pressing plates for coil pressing, and a pull rod is arranged to fix the pressing plates. The spring mechanism is sleeved on the pull rod on the upper portion of the top face of the top pressing plate and located between the top pressing plate and the upper pressing beam welding device, and the upper pressing beam welding device presses the spring mechanism downwards. According to the scheme, accurate pressure can be applied to the pressed coil according to technological requirements, pressure is continuously applied to the coil in the coil drying process, rebound in the coil assembling process can be effectively prevented, and the short circuit resistance of the coil is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer coil manufacturing, in particular to a coil pressing device and a pressing method. Background Art

[0002] When drying the coil in the coil pressing process, the traditional process is to first remove the wound coil from the winding mold, check for compliance, place insulating pads and end insulation at both ends of the coil, put it in a four-column spiral pressing device, tighten the nut above the screw, press down the top pressure plate, thereby pressing the coil down and applying a pressure that meets the pressure requirements to the coil; however, the coil will shrink during the drying process, and the screw and top pressure plate of the pressing device cannot give the coil enough pressure at this time, and can only rely on the gravity of the top pressure plate, but the gravity is less than the required applied pressure range, which may cause rebound in the coil assembly process, greatly affecting the coil's ability to resist short circuits; in order to solve this problem, manual pressure is often required during the drying process, which is not only time-consuming and labor-intensive, but also inconvenient to operate.

[0003] Therefore, there is an urgent need for a coil pressing device and a pressing method, which can apply precise pressure to the pressed coil according to the process requirements and continuously apply pressure to the coil during the coil drying process, which can effectively prevent rebound during the coil assembly process and improve the coil's anti-short circuit capability. Summary of the invention

[0004] One of the purposes of the present invention is to provide a coil pressing device, which can apply precise pressure to the pressed coil according to the process requirements and continuously apply pressure to the coil during the coil drying process, which can effectively prevent rebound during the coil assembly process and improve the coil's anti-short circuit capability.

[0005] The first basic solution provided by the present invention is a coil press-fitting device, comprising: a hydraulic control system, a center column press-fitting tool, a coil press-fitting device, and a spring mechanism;

[0006] Hydraulic control system, used to output press-fitting pressure;

[0007] The center column press-fitting tool is used to clamp the coil press-fitting and spring mechanism, and press-fit through the hydraulic control system set on the top;

[0008] The center column press fittings include: base frame welding, upper pressure beam welding and center column;

[0009] The hydraulic control system is arranged on the top surface of the upper pressure beam welding assembly, the coil press assembly and the spring mechanism are arranged between the base frame welding assembly and the upper pressure beam welding assembly, the middle column passes through the center of the hydraulic control system, the upper pressure beam welding assembly and the coil press assembly, and is inserted into the base frame welding assembly, and the hydraulic control system is provided with a nut nesting device sleeved on the middle column to fasten the middle column press assembly tooling;

[0010] The coil press-fitting comprises: a press plate; the coil to be press-fitted is arranged between two press plates, and a pull rod passing through the two press plates is arranged to fix the press plates;

[0011] The spring mechanism is sleeved on the pull rod on the upper part of the top surface of the top pressure plate and is located between the top pressure plate and the upper pressure beam welding assembly, and the upper pressure beam welding assembly presses down the spring mechanism.

[0012] Further, the hydraulic control system is also used to control the pressure value, including: a PLC control system and a hydraulic jack;

[0013] The PLC control system is used to obtain the input coil parameters, including: the gear position of the coil, the coil amplitude phase, the width of the pad, the pressure applied to the coil, calculate the output pressure, and automatically control the pressure output by the hydraulic jack when pressing the coil;

[0014] Hydraulic jack, used to balance and distribute the output pressure;

[0015] The hydraulic jack includes a double-acting hollow oil cylinder and a jack top plate, which are used to apply pressure to the coil press.

[0016] Furthermore, the base frame welding and the upper pressure beam welding both use brackets, including: a cross bracket, a triangle bracket or a Pozi bracket.

[0017] Further, the double-acting hollow oil cylinder is vertically arranged between the top plate of the jack and the upper pressure beam welding assembly, and a plurality of double-acting hollow oil cylinders are evenly arranged in an annular shape;

[0018] A first through hole is arranged at the center of the top plate of the jack, a second through hole is arranged at the center of the upper pressure beam welding assembly, a third through hole is arranged at the center of the coil press assembly, and a groove is arranged at the center of the base frame welding assembly. The middle column passes through the first through hole of the top plate of the jack, the second through hole of the upper pressure beam welding assembly, and the second through hole of the coil press assembly, and is inserted into the groove of the base frame welding assembly; a nut nesting device is arranged on the top plate of the jack, which is sleeved on the middle column to tighten the entire middle column press assembly tooling.

[0019] Furthermore, the pressing plate is provided with a plurality of fourth through holes which are evenly and annularly arranged on the pressing plate;

[0020] The pressing plate includes: a bottom pressing plate and a top pressing plate; the bottom pressing plate and the top pressing plate are arranged in parallel, and the pull rods are passed through the two opposite fourth through holes; the third through hole is arranged in the center of the bottom pressing plate and the top pressing plate.

[0021] Furthermore, the spring mechanism comprises: a top plate, a bottom plate and a spring, wherein the upper and lower ends of the spring are connected to the top plate and the bottom plate respectively; wherein the top plate and the bottom plate are both circular plates with a central hole, and the spring is concentrically fixed between the two plates; the pull rod passes through the central hole, and after the spring is compressed and the coil is pressed, it is locked by a locking member;

[0022] The locking member is a second nut, which is threadedly connected to the pull rod and is rotated and pressed downward to lock the spring mechanism between the fastener and the top pressure plate.

[0023] Furthermore, the locking member includes: a second nut; the second nut is threadedly connected to the pull rod, and is rotated and pressed downward to lock the spring mechanism between the second nut and the top pressure plate.

[0024] Furthermore, a fifth through hole is provided on the base frame welding assembly and the upper pressure beam welding assembly at a position corresponding to the fourth through hole, the top of the pull rod passes through the fifth through hole of the upper pressure beam welding assembly, and the bottom passes through the fifth through hole of the base frame welding assembly;

[0025] The locking piece also includes: a steel pipe, which is sleeved on the pull rod and passes through the fifth through hole. A flat washer is arranged on the top of the steel pipe, and a second nut is arranged on the flat washer and is threadedly connected with the pull rod.

[0026] Beneficial effects of this solution: The hydraulic control system of this solution applies pressure to the center column press fitting, which compresses and stores energy the spring mechanism set between the upper pressure beam welding and the coil press fitting; the spring mechanism applies pressure to the coil press fitting pressure plate to press the coil tightly; during the drying process of the coil in the furnace, the coil shrinks and the spring mechanism continues to provide pressure to keep the coil under pressure within the range required by the process.

[0027] The specific use process is as follows: first, assemble the coils for press-fitting, place the coils to be press-fitted on the bottom press plate, place the top press plate on the coils, install the tie rods, and connect the tie rods to the bottom press plate, or first install the tie rods on the bottom press plate, and then place the coils on the bottom press plate, located between several tie rods;

[0028] Then the coil press is installed on the center column press tooling, that is, the coil press is placed on the base frame welding assembly, and the center column passes through the coil press; a spring mechanism is sleeved on the pull rod on the upper part of the top surface of the top pressure plate of the coil press, and then the upper pressure beam welding assembly and the hydraulic jack are installed, and the center column passes through the hydraulic control system, the upper pressure beam welding assembly and the coil press and is inserted into the base frame welding assembly, and the center column press tooling is fastened by a nut nesting device sleeved on the center column;

[0029] Then, the PLC control system controls the output pressure of the hydraulic jack according to the coil parameters, and presses down through the upper pressure beam welding assembly, so that the spring mechanism is compressed and energy is stored; after the coil is compressed, the hydraulic control system and the center column press assembly tooling can be removed or not;

[0030] During the drying process, the coil shrinks. Regardless of whether the hydraulic control system and the center column press tooling are removed, the hydraulic jack cannot fully apply pressure to the coil. At this time, the compressed spring mechanism stretches, pushing the top pressure plate and applying downward pressure to the top pressure plate, thereby continuously applying pressure to the coil to prevent the coil from rebounding and affecting its anti-short circuit capability. And by adjusting and controlling the compression of the spring mechanism, precise pressure can be applied to the press-fitted coil.

[0031] In summary, this solution can apply precise pressure to the pressed coil according to the process requirements, and continuously apply pressure to the coil during the coil drying process, which can effectively prevent rebound during the coil assembly process and improve the coil's ability to resist short circuits. It does not require manual adjustment, is convenient and fast, and has high universality.

[0032] The second object of the present invention is to provide a coil pressing method, which can apply precise pressure to the pressed coil according to the process requirements, and continuously apply pressure to the coil during the coil drying process, which can effectively prevent rebound during the coil assembly process and improve the coil's anti-short circuit capability.

[0033] The present invention provides a second basic solution: a coil press-assembly method, using the above coil press-assembly device, including the following contents:

[0034] The center column type press fitting tool and the hydraulic control system clamp and press the coil press fitting and spring mechanism. After the coil is pressed, the spring mechanism is locked, and the center column type press fitting tool and the hydraulic control system are removed and then dried.

[0035] Beneficial effects of this solution: This solution does not require the configuration of a hydraulic control system, especially a high-temperature resistant hydraulic jack. A set of center column press fittings and a hydraulic control system can press several press coils. Each coil is equipped with a corresponding spring mechanism. After it is pressed, the spring mechanism is locked, and the coil can maintain the pressing effect.

[0036] This solution can apply precise pressure to the press-fitted coil according to the process requirements, and continuously apply pressure to the coil during the coil drying process, which can effectively prevent the coil from rebounding during the assembly process and improve the coil's ability to resist short circuits.

[0037] The third object of the present invention is to provide a coil pressing method, which can apply precise pressure to the pressed coil according to the process requirements, and continuously apply pressure to the coil during the coil drying process, which can effectively prevent rebound during the coil assembly process and improve the coil's anti-short circuit capability.

[0038] The present invention provides a third basic solution: a coil press-assembly method, using the above coil press-assembly device, including the following contents:

[0039] The center column type press fitting and hydraulic control system clamp and press the coil press fitting and spring mechanism, and after the coil is pressed, it is dried.

[0040] The beneficial effects of this scheme: after the coil is pressed and installed, the hydraulic jack does not release pressure. The hydraulic pipe connected to the hydraulic jack is removed, and the center column type press fitting and the hydraulic control system can be directly put into the furnace for drying, and the pull rod and spring mechanism of the coil do not need to be locked.

[0041] This solution can apply precise pressure to the press-fitted coil according to the process requirements, and continuously apply pressure to the coil during the coil drying process, which can effectively prevent the coil from rebounding during the assembly process and improve the coil's ability to resist short circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the structure of a coil pressing device according to an embodiment of the present invention Figure 1 ;

[0043] Figure 2 for Figure 1 Cross-sectional view along MM direction;

[0044] Figure 3 A schematic diagram of the structure of a coil pressing device in an embodiment of the present invention Figure 2 ;

[0045] Figure 4 It is a structural schematic diagram of a spring mechanism in an embodiment of a coil press-fitting device of the present invention;

[0046] Figure 5 It is a structural schematic diagram of a nut nesting device in an embodiment of a coil press-fitting device of the present invention. DETAILED DESCRIPTION

[0047] The following is further described in detail through specific implementation methods:

[0048] The figure marks in the drawings of the specification include: hydraulic jack 1, center column press fitting 2, coil press fitting 3, spring mechanism 4, double-acting hollow cylinder 101, jack top plate 102, base frame welding 201, upper pressure beam welding 202, center column 203, first support column 204, nut nesting device 205, nut nesting shell 2051, half nut 2052, pressure plate 301, coil 302, pull rod 303, pad 304, first nut 305, lug 306, second support column 307, top plate 401, bottom plate 402, spring 403, second nut 404, steel pipe 305, flat washer 306.

[0049] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In the description of this specification, it should be understood that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limitations on the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to the "upper", "lower", "left", or "right" of another element, it can not only be directly connected to the "upper", "lower", "left", or "right" of another element, but can also be indirectly connected to the "upper", "lower", "left", or "right" of another element through an intermediate element.

[0051] Embodiment 1

[0052] The embodiment is basically as shown in the attached Figure 1 As shown: a coil press-fitting device, comprising: a hydraulic control system, a center column press-fitting tool 2, a coil press-fitting 3, and a spring mechanism 4;

[0053] A hydraulic control system, used for outputting the pressing pressure and controlling the pressure value, including: a PLC control system and a hydraulic jack 1;

[0054] The PLC control system is used to obtain the input parameters of the coil 302, including: the gear position of the coil 302, the amplitude phase of the coil 302, the width of the pad 304, the pressure applied to the coil 302, calculate the output pressure, and automatically control the pressure output by the hydraulic jack 1 when the coil 302 is pressed; at the same time, the PLC control system has an overpressure protection function to avoid the coil 302 from being damaged by misoperation;

[0055] Hydraulic jack 1, used for balancing and distributing the output pressure;

[0056] The hydraulic jack 1 includes: a double-acting hollow oil cylinder 101 and a jack top plate 102, which are used to apply pressure to the coil press 3;

[0057] The center column type press fitting 2 is used to clamp the coil press fitting 3 and the spring mechanism 4, and press fitting is performed through the hydraulic jack 1 arranged on the top;

[0058] The center column type press fitting 2 comprises: a base frame welding assembly 201, an upper press beam welding assembly 202 and a center column 203;

[0059] The hydraulic jack 1 is arranged on the top surface of the upper pressure beam welding assembly 202, the coil press assembly 3 and the spring mechanism 4 are arranged between the base frame welding assembly 201 and the upper pressure beam welding assembly 202, the middle column 203 passes through the center of the hydraulic jack 1, the upper pressure beam welding assembly 202 and the coil press assembly 3, and is inserted into the base frame welding assembly 201, and the hydraulic jack 1 is provided with a nut nesting device 205 sleeved on the middle column 203 to fasten the middle column press assembly tool 2;

[0060] The coil press assembly 3 is installed on the base frame welding assembly 201, the upper pressure beam welding assembly 202 is installed on the coil press assembly 3, the hydraulic jack 1 is installed on the upper pressure beam welding assembly 202, and the middle column 203 passes through the center of the hydraulic jack 1, the upper pressure beam welding assembly 202 and the coil press assembly 3 and is inserted into the base frame welding assembly 201;

[0061] Specifically, the base frame welding assembly 201 and the upper pressure beam welding assembly 202 both use brackets, including: a cross bracket, a triangular bracket or a cross bracket. In this embodiment, a cross bracket is used;

[0062] The double-acting hollow oil cylinder 101 is vertically arranged between the jack top plate 102 and the upper pressure beam welding assembly 202, and a plurality of double-acting hollow oil cylinders 101 are evenly arranged in an annular shape;

[0063] A first through hole is arranged at the center of the jack top plate 102, a second through hole is arranged at the center of the upper pressure beam welding assembly 202, a third through hole is arranged at the center of the coil press assembly 3, and a groove is arranged at the center of the base frame welding assembly 201. The middle column 203 passes through the first through hole of the jack top plate 102, the second through hole of the upper pressure beam welding assembly 202, and the second through hole of the coil press assembly 3, which are arranged relatively, and is inserted into the groove of the base frame welding assembly 201; a nut nesting device 205 is arranged on the jack top plate 102, which is sleeved on the middle column 203 to tighten the entire middle column type press assembly tool 2, specifically, to tighten the base frame welding assembly 201, the upper pressure beam welding assembly 202, the double-acting hollow oil cylinder 101 and the jack top plate 102;

[0064] Wherein the nut nesting device 205, such as Figure 5As shown, it includes a nut nesting shell 2051 and a plurality of half nuts 2052; the opening surfaces of the two half nuts 2052 are butted together to form a nut, and the outer circumference of the nut is the same shape as the inner circumference of the nut nesting shell 2051; in this embodiment, the nut is a hexagonal nut, and the nut in other embodiments can also be set as other nuts, such as square nuts, flange nuts, etc.; the nut is placed in the nut nesting shell 2051, and the outer circumference of the nut is in contact with the inner circumference of the nut nesting shell 2051; a mounting through hole is provided at the top of the nut nesting shell 2051, and the diameter of the mounting through hole is larger than the major diameter of the internal thread of the nut, so that the bolt can pass through the nut nesting shell 2051; a plurality of rotating ears 306 are relatively provided on the outer side surface of the nut nesting shell 2051 to facilitate the rotation or removal of the nut nesting shell 2051. In this embodiment, two cylindrical rotating ears 306 are welded to the outer side surface of the nut nesting shell 2051.

[0065] In addition, a first support column 204 is provided on the bottom surface of the base frame welding device 201 to support the middle column type press fitting device 2 to reduce friction with the ground;

[0066] The coil press assembly 3 includes: a press plate 301; a coil 302 to be press assembled is arranged between two press plates 301, and a pull rod 303 passing through the two press plates 301 is arranged to fix the press plates 301;

[0067] Specifically, an insulating pad 304 is placed between the pressing plate 301 and the coil 302, and the coil 302 is placed between the pad 304; a plurality of fourth through holes are provided on the pressing plate 301; specifically, in this embodiment, there are four fourth through holes, which are evenly arranged in an annular shape on the pressing plate 301, and the distance between the two diagonal fourth through holes is greater than the distance between the coils 302 to be pressed;

[0068] The pressing plate 301 includes: a bottom pressing plate 301 and a top pressing plate 301; the bottom pressing plate 301 and the top pressing plate 301 are arranged in parallel, and the pull rods 303 are arranged through the two opposite fourth through holes, such as Figure 2 As shown; the pull rod 303 is detachably connected to the pressure plate 301. In this embodiment, a first nut 305 is provided on the bottom surface of the bottom pressure plate 301 to fix the pull rod 303; a third through hole is provided at the center of the bottom pressure plate 301 and the top pressure plate 301;

[0069] In addition, a plurality of ears 306 are vertically arranged on the top surface of the top pressing plate 301, and lifting holes are arranged on the side surfaces of the ears 306 to facilitate the lifting and movement of the entire device; a second support column 307 is also arranged on the bottom surface of the bottom pressing plate 301 for supporting the coil pressing 3.

[0070] The spring mechanism 4 is sleeved on the pull rod 303 on the upper part of the top surface of the top pressure plate 301 (i.e. the top pressure plate 301), and is located between the top pressure plate 301 and the upper pressure beam welding assembly 202;

[0071] The spring mechanism 4 includes: a top plate 401, a bottom plate 402 and a spring 403. The upper and lower ends of the spring 403 are connected to the top plate 401 and the bottom plate 402 respectively. Figure 4 As shown; the top plate 401 and the bottom plate 402 are both circular plates with a central hole, and the spring 403 is concentrically fixed between the two plates. The spring 403 can be designed as a single-layer, double-layer or triple-layer structure to meet the pressure load requirements of the coil 302; the pull rod 303 can pass through the central hole, and the spring 403 compresses and presses the coil 302, and then is locked by a locking member;

[0072] The locking member is used to lock the spring mechanism 4. In this embodiment, the locking member is a second nut 404. The second nut 404 is threadedly connected to the pull rod 303, and the spring mechanism 4 is locked between the second nut 404 and the top pressure plate 301 by rotating and pressing down.

[0073] A fifth through hole is provided on the base frame welding assembly 201 and the upper pressure beam welding assembly 202 at a position corresponding to the fourth through hole. In this embodiment, the fifth through hole is a flat elliptical hole. The top of the pull rod 303 passes through the fifth through hole of the upper pressure beam welding assembly 202, and the bottom passes through the fifth through hole of the base frame welding assembly 201 without affecting the rotation of the first nut 305 and the second nut 404.

[0074] In order to facilitate the spring 403 to compress and tighten the coil 302, and then lock it through a locking piece, the locking piece also includes a steel pipe 305, the steel pipe 305 is sleeved on the pull rod 303, and the steel pipe 305 passes through the fifth through hole, a flat washer 306 is arranged on the top of the steel pipe 305, and the second nut 404 is arranged on the flat washer 306 and is threadedly connected to the pull rod 303; and the second nut 404 is located on the upper pressure beam welding 202, so there is no need to rotate the second nut 404 to pass through the fifth through hole, which is more convenient for locking the spring mechanism 4.

[0075] In the specific use process, firstly, the coil press 3 is assembled, the coil 302 to be press-assembled is placed on the bottom pressing plate 301, the top pressing plate 301 is placed on the coil 302, the tie rod 303 is installed, and the tie rod 303 is connected to the bottom pressing plate 301, or the tie rod 303 is first installed on the bottom pressing plate 301, and then the coil 302 is placed on the bottom pressing plate 301, located between a plurality of tie rods 303;

[0076] Then, the coil press assembly 3 is installed on the middle column press assembly 2, that is, the coil press assembly 3 is placed on the base frame welding assembly 201, and the middle column 203 passes through the coil press assembly 3; the spring mechanism 4 is sleeved on the pull rod 303 on the upper part of the top surface of the top pressure plate 301 of the coil press assembly 3, and then the upper pressure beam welding assembly 202 and the hydraulic jack 1 are installed, and the middle column 203 passes through the hydraulic control system, the upper pressure beam welding assembly 202 and the coil press assembly 3 and is inserted into the base frame welding assembly 201, and the middle column press assembly 2 is fastened by the nut nesting device 205 sleeved on the middle column 203;

[0077] Then, the PLC control system controls the output pressure of the hydraulic jack 1 according to the parameters of the coil 302, and presses down through the upper pressure beam welding assembly 202, so that the spring mechanism 4 is compressed and stores energy; the general pressure range is 2.5-3.5MPa; the compression amount and elastic coefficient of the spring mechanism 43 are set according to the expansion and contraction amount of the coil 302102 during the drying process;

[0078] During the drying process, the coil 302 contracts, and the hydraulic jack 1 cannot fully apply pressure to the coil press 3. At this time, the compressed spring mechanism 4 extends, pushing the top pressure plate 301, and applying downward pressure to the top pressure plate 301, thereby continuously applying pressure to the coil 302 to prevent the coil 302 from rebounding and affecting its anti-short circuit capability. And by adjusting and controlling the compression of the spring mechanism 4, precise pressure can be applied to the press-fitted coil 302.

[0079] In summary, this solution can apply precise pressure to the pressed coil 302 according to the process requirements, and continuously apply pressure to the coil 302 during the drying process of the coil 302, which can effectively prevent the coil 302 from rebounding during the assembly process and improve the short-circuit resistance of the coil 302. It does not require manual adjustment, is convenient and fast, and has high universality.

[0080] This embodiment also provides a coil press-fitting method, using the above coil press-fitting device 3, including the following contents:

[0081] The center column type press fitting 2 and the hydraulic control system clamp and press the coil press fitting 3 and the spring mechanism 4. After the coil 302 is pressed, the spring mechanism 4 is locked, and the center column type press fitting 2 and the hydraulic control system are removed and then dried.

[0082] The specific steps are as follows: S1, installing a spring mechanism 4 on a coil press 3;

[0083] S2, the middle column type press fitting 2 clamps the coil press fitting 3 and the spring mechanism 4, and performs press fitting through the hydraulic control system arranged on the top;

[0084] S3, after the coil 302 is compressed, the locking member of the spring mechanism 4 locks the spring 403;

[0085] S4, dismantling the center column type press fitting 2 and the hydraulic control system, and drying the pressed coil 302;

[0086] S5. Press-fit the next set of coils 3 and execute S1.

[0087] This solution does not need to be equipped with a hydraulic control system, especially a high temperature resistant hydraulic jack 1. A set of center column press fitting tooling 2 and a hydraulic control system can press several press fitting coils 302. Each coil press fitting 3 is equipped with a corresponding spring mechanism 4. After it is pressed, the spring mechanism 4 is locked, and the coil 302 can maintain the pressing effect.

[0088] This solution can apply precise pressure to the pressed coil 302 according to the process requirements, and continuously apply pressure to the coil 302 during the drying process of the coil 302, which can effectively prevent the coil 302 from rebounding during the assembly process and improve the short circuit resistance of the coil 302.

[0089] Other embodiments also provide a coil pressing method, using the above-mentioned coil pressing device 3, including the following contents: a central column pressing tool 2 and a hydraulic control system clamp and press the coil 3 and the spring mechanism 4, and after the coil 302 is pressed, it is dried.

[0090] The specific steps are as follows: S1, installing a spring mechanism 4 on a coil press 3;

[0091] S2, the middle column type press fitting 2 clamps the coil press fitting 3 and the spring mechanism 4, and performs press fitting through the hydraulic control system arranged on the top;

[0092] S3. After the coil 302 is compacted, the compacted coil 302 is dried.

[0093] After the coil is pressed and assembled 3, the hydraulic jack 1 does not release pressure. The hydraulic pipe connected to the hydraulic jack 1 is removed, and the center column type press-fitting tool 2 and the hydraulic control system can be directly put into the furnace for drying, and the pull rod 303 and the spring mechanism 4 of the coil 302 do not need to be locked.

[0094] This solution can apply precise pressure to the pressed coil 302 according to the process requirements, and continuously apply pressure to the coil 302 during the drying process of the coil 302, which can effectively prevent the coil 302 from rebounding during the assembly process and improve the short circuit resistance of the coil 302.

[0095] Embodiment 2

[0096] This embodiment is basically the same as the above embodiment, except that it further includes: a pressure detection module;

[0097] The pressure detection module is arranged below the spring mechanism 4, and is used to perform pressure detection, generate a pressure value and send it to the controller. Specifically, the pressure detection module uses a pressure sensor, whose sensing end is arranged below the bottom plate 402, to detect the pressure of the spring mechanism 4;

[0098] The PLC control system is also used to determine whether the pressure value is within the preset range. If not, it will issue a pressure adjustment reminder to further ensure that the pressure value is within the preset range and ensure the pressing effect.

[0099] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A coil pressing device, characterized in that: include: Hydraulic control system, center column press fitting, coil press fitting, spring mechanism; Hydraulic control system, used to output press-fitting pressure; The center column press-fitting tool is used to clamp the coil press-fitting and spring mechanism, and press-fit through the hydraulic control system set on the top; The center column press fittings include: base frame welding, upper pressure beam welding and center column; The hydraulic control system is arranged on the top surface of the upper pressure beam welding assembly, the coil press assembly and the spring mechanism are arranged between the base frame welding assembly and the upper pressure beam welding assembly, the middle column passes through the center of the hydraulic control system, the upper pressure beam welding assembly and the coil press assembly, and is inserted into the base frame welding assembly, and the hydraulic control system is provided with a nut nesting device sleeved on the middle column to fasten the middle column press assembly tooling; The coil press-fitting comprises: a press plate; the coil to be press-fitted is arranged between two press plates, and a pull rod passing through the two press plates is arranged to fix the press plates; The spring mechanism is sleeved on the pull rod on the upper part of the top surface of the top pressure plate and is located between the top pressure plate and the upper pressure beam welding assembly, and the upper pressure beam welding assembly presses down the spring mechanism.

2. The coil press-fitting device according to claim 1, characterized in that: The hydraulic control system is also used to control the pressure value, including: a PLC control system and a hydraulic jack; The PLC control system is used to obtain the input coil parameters, including: the gear position of the coil, the coil amplitude phase, the width of the pad, the pressure applied to the coil, calculate the output pressure, and automatically control the pressure output by the hydraulic jack when pressing the coil; Hydraulic jack, used to balance and distribute the output pressure; The hydraulic jack includes a double-acting hollow oil cylinder and a jack top plate, which are used to apply pressure to the coil press.

3. The coil press-fitting device according to claim 1, characterized in that: The base frame welding and the upper pressure beam welding both adopt brackets, including: a cross bracket, a triangle bracket or a Pozi bracket.

4. The coil press-fitting device according to claim 2, characterized in that: The double-acting hollow oil cylinder is vertically arranged between the top plate of the jack and the upper pressure beam welding assembly, and a plurality of double-acting hollow oil cylinders are evenly arranged in an annular shape; A first through hole is arranged at the center of the top plate of the jack, a second through hole is arranged at the center of the upper pressure beam welding assembly, a third through hole is arranged at the center of the coil pressing assembly, and a groove is arranged at the center of the base frame welding assembly. The middle column passes through the first through hole of the relatively arranged top plate of the jack, the second through hole of the upper pressure beam welding assembly, and the second through hole of the coil pressing assembly, and is inserted into the groove of the base frame welding assembly; a nut nesting device is arranged on the top plate of the jack, which is sleeved on the middle column to tighten the entire middle column type pressing tooling.

5. The coil press-fitting device according to claim 1, characterized in that: The pressing plate is provided with a plurality of fourth through holes which are evenly and annularly arranged on the pressing plate; The pressing plate includes: a bottom pressing plate and a top pressing plate; the bottom pressing plate and the top pressing plate are arranged in parallel, and the pull rods are passed through the two opposite fourth through holes; the third through hole is arranged in the center of the bottom pressing plate and the top pressing plate.

6. The coil press-fitting device according to claim 1, characterized in that: The spring mechanism comprises: a top plate, a bottom plate and a spring, wherein the upper and lower ends of the spring are connected to the top plate and the bottom plate respectively; wherein the top plate and the bottom plate are both circular plates with a central hole, and the spring is concentrically fixed between the two plates; the pull rod passes through the central hole, and after the spring is compressed and the coil is pressed, it is locked by a locking member; The locking member is a second nut, which is threadedly connected to the pull rod and is rotated and pressed downward to lock the spring mechanism between the fastener and the top pressure plate.

7. The coil press-fitting device according to claim 6, characterized in that: The locking member includes: a second nut; the second nut is threadedly connected to the pull rod, and is rotated and pressed downward to lock the spring mechanism between the second nut and the top pressure plate.

8. The coil press-fitting device according to claim 7, characterized in that: The base frame welding device and the upper pressure beam welding device are provided with a fifth through hole at a position corresponding to the fourth through hole, the top of the pull rod passes through the fifth through hole of the upper pressure beam welding device, and the bottom passes through the fifth through hole of the base frame welding device; The locking piece also includes: a steel pipe, which is sleeved on the pull rod and passes through the fifth through hole. A flat washer is arranged on the top of the steel pipe, and a second nut is arranged on the flat washer and is threadedly connected with the pull rod.

9. A coil press-fitting method, characterized in that: The coil pressing device as described in any one of claims 1 to 8 includes the following contents: a center column type pressing tool and a hydraulic control system clamp and press the coil pressing and spring mechanism, after the coil is pressed, the spring mechanism is locked, and the center column type pressing tool and the hydraulic control system are removed and then dried.

10. A coil press-fitting method, characterized in that: The coil pressing device according to any one of claims 1 to 8 comprises the following contents: The center column type press fitting and hydraulic control system clamp and press the coil press fitting and spring mechanism, and after the coil is pressed, it is dried.

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