CN113909859A - Flexible direct current converter valve power unit crimping equipment and crimping method - Google Patents
Flexible direct current converter valve power unit crimping equipment and crimping method Download PDFInfo
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- CN113909859A CN113909859A CN202111234554.4A CN202111234554A CN113909859A CN 113909859 A CN113909859 A CN 113909859A CN 202111234554 A CN202111234554 A CN 202111234554A CN 113909859 A CN113909859 A CN 113909859A
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- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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Abstract
A flexible direct current converter valve power unit crimping device and a crimping method are provided, wherein the crimping device comprises a cabinet and an oil press; the cabinet comprises a PLC control cabinet, and a display operation platform is arranged above the PLC control cabinet; the oil press comprises a base, the top of the base is connected with the bottom of the machine body, and a supporting seat assembly and a pressure head assembly are respectively arranged at two ends of the top of the machine body; the support seat assembly and the pressure head assembly in the oil press are controlled by the PLC control cabinet, and the IGBT compression joint component and the thyristor compression joint component are precisely compressed at one time, so that the problems of IGBT damage, poor compression joint quality and low compression joint efficiency caused by multiple compression joints are solved; in addition, the hydraulic oil cylinder is controlled to crimp the full-bridge power unit and the half-power unit of the flexible-straight converter valve through the PLC control cabinet, and the consistency of a crimping process and crimping data have traceability; has the advantages of convenient operation, high accuracy, safety, reliability, practicality and high efficiency.
Description
Technical Field
The invention belongs to the technical field of flexible direct current transmission, and particularly relates to flexible direct current converter valve power unit crimping equipment and a crimping method.
Background
Due to controllability, flexibility and stability, the flexible direct current transmission has a wide prospect in distributed power generation, isolated island and urban expansion power supply, is a development direction of long-distance and large-capacity direct current transmission in the future, and development of high-reliability converter valves and valve control equipment is the most core technology.
With the development of power electronic technology, an Insulated Gate Bipolar Transistor (IGBT) device, which is a core of a converter valve power cell, is developed to a higher voltage and a higher current level. The conventional welding type IGBT module adopts single-sided heat dissipation, so that the power exertion of a device is limited, and the defects of series-parallel connection, poor salt spray resistance, vibration impact resistance, poor thermal fatigue performance and the like are not easy to gradually quit the field of flexible direct-current power transmission. The novel flat plate full-compression joint type high-power IGBT (compression joint type IGBT for short) device not only thoroughly solves the problems of easy generation of cavities in a welding process, thermal fatigue of welding materials and low single-side heat dissipation efficiency, but also eliminates thermal resistance generated by various parts, reduces the volume and the weight, greatly improves the working efficiency and the reliability of the IGBT, is very suitable for the requirements of high power, high voltage and high reliability of the converter valve device of the current flexible direct current transmission system, and is widely applied to the flexible direct current transmission system. With the maturity of the flexible direct current transmission technology, a bypass thyristor is often added to an output loop of the IGBT crimping assembly to improve the reliability of the flexible direct current converter valve. The shapes of the IGBT and the thyristor are different, and the pressing force values meeting the use are different, so that the use requirements of the IGBT and the thyristor are ensured by adopting an independent pressing mechanism, and the converter valve power unit pressing connection assembly is generally defined as an IGBT pressing connection assembly and a thyristor pressing connection assembly respectively. Due to the limitation of space factors and the complex electrical connection and heat dissipation requirements between the IGBT and the thyristor, the two crimping assemblies often need to share the water-cooled radiator and the connecting copper bar, so that the problems that the crimping of the IGBT and the thyristor is difficult, the crimping quality is poor, the crimping efficiency is low, and the IGBT is easily damaged by multiple times of crimping are solved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide flexible-straight converter valve power unit crimping equipment and a crimping method, which meet the requirement of one-time accurate crimping of an IGBT crimping component and a thyristor crimping component through flexible-straight converter valve power unit crimping complete equipment, and avoid the problems of IGBT damage, poor crimping quality and low crimping efficiency caused by multiple crimping.
In order to achieve the purpose, the invention adopts the following technical scheme:
the flexible direct current converter valve power unit crimping equipment comprises a cabinet 100 and an oil press 200; the cabinet 100 comprises a PLC control cabinet 101, and a display operation platform 102 is arranged above the PLC control cabinet 101; the oil press 200 comprises a base 201, the top of the base 201 is connected with the bottom of a machine body 202, and a support seat assembly 203 and a pressure head assembly 204 are respectively arranged at two ends of the top of the machine body 202; the support seat assembly (203) and the pressure head assembly (204) in the oil press (200) are controlled by the PLC control cabinet (101), and the IGBT compression joint assembly (500) and the thyristor compression joint assembly (600) are subjected to one-time compression joint; and a PLC control cabinet (101) is used for controlling the hydraulic oil cylinder to crimp the full-bridge power unit and the half-power unit of the flexible direct current converter valve.
The support seat assembly 203 comprises a support oil cylinder 2034, the cylinder end of the support oil cylinder 2034 is connected with the top of the machine body 202, the piston end of the support oil cylinder 2034 is connected with the bottom end of a support beam 2033, the front end of the support beam 2033 is respectively connected with the connecting ends of a common bearing head 2031 and a compensation bearing head 2032, and the free end of the compensation bearing head 2032 is provided with a compensator 2037; the two sides of the supporting oil cylinder 2034 are respectively provided with a limiting oil cylinder 2036, the end of the limiting oil cylinder 2036 is connected with the top of the body 202, the end of the piston of the limiting oil cylinder 2036 is connected with one end of a limiting arm 2035, and the other end of the limiting arm 2035 is in an extending state and is abutted against the supporting beam 2033 to support the supporting beam 2033.
The fuselage 202 is the shape of a saddle that both ends are high, and the centre is low, and fuselage 202 top both ends are connected with the bottom of supporting seat assembly 203 and pressure head assembly 204 can be dismantled through the bolt respectively, between the bottom of supporting seat assembly 203 and pressure head assembly 204 and fuselage 202 top both ends, still are equipped with card key 2049.
The compensation bearing head 2032 is configured with different compensators 2037 as required to match the compression connection of the half-bridge power unit and the full-bridge power unit of the soft-direct converter valve.
And displacement sensors are respectively arranged at the piston end of the supporting oil cylinder 2034, the piston end of the limiting oil cylinder 2036, and the piston ends of the driving oil cylinder I2041 and the driving oil cylinder II 2042.
An air switch, a relay and a PLC controller are integrated in the PLC control cabinet 101, wherein the air switch is used for power control of the whole control cabinet, and the power output end of the air switch is connected with the 24VDC power input end of the PLC controller through the relay; the signal input end of the PLC controller is respectively connected with the piston end of the supporting oil cylinder 2034, the piston end of the limiting oil cylinder 2036, the signal output ends of displacement sensors on the piston ends of the driving oil cylinder I2041 and the driving oil cylinder II 2042, and the signal output ends of the pressure sensor I2043 and the pressure sensor II 2044, the signal output end of the PLC controller is respectively connected with the signal input ends of a display screen and a buzzer on the display operation table 102, and the signal output end of the PLC controller controls the telescopic motion of the oil cylinders through the piston end of the supporting oil cylinder 2034, the piston end of the limiting oil cylinder 2036, the servo controllers of the driving oil cylinder I2041 and the driving oil cylinder II 2042.
A crimping method of flexible direct current converter valve power unit crimping equipment specifically comprises the following steps:
stp 1: presetting a pressure gear within the maximum pressing force range of the oil press 200 through a PLC controller according to needs, and setting a single-cylinder working mode or a multi-cylinder working mode and related parameters according to crimping needs; according to the half-bridge unit or the full-bridge power unit of the flexible-direct converter valve, a corresponding compensator 2037 is installed on the compensation bearing head 2032; accurately stacking, clamping and positioning each device of the IGBT crimping assembly 500 and the thyristor crimping assembly 600 on the crimping assembly line 300 through the positioning device 400 on the assembly line 300, and conveying the devices to a crimping station along with the crimping assembly line 300;
stp 2: turning on a power supply, selecting a corresponding pressure gear within a preset pressure gear of Stp1, starting the supporting oil cylinder 2034, extending a piston end of the supporting oil cylinder 2034, extending the common bearing head 2031, the compensation bearing head 2032 and the supporting beam 2033 along with the supporting oil cylinder 2034, transmitting a displacement signal to a PLC (programmable logic controller) by a displacement sensor of the supporting oil cylinder 2034, starting the limit oil cylinder 2036 after the PLC monitors that the supporting oil cylinder 2034 extends to a mechanical supporting position, driving the limit arm 2035 to rotate and extend, and transmitting the displacement signal to the PLC by the displacement sensor of the limit oil cylinder 2036;
stp 3: when the PLC monitors that the limit oil cylinder 2036 extends out of the mechanical support position, an active oil cylinder I2041 and an active oil cylinder II 2042 of the oil press 200 are selected to be started simultaneously or independently as required, the active oil cylinder I2041 and the active oil cylinder II 2042 drive a four-claw pressure head 2045 and a flat plate pressure head 2046 to move towards the crimping component respectively at the speed of 5-8mm/S, when the system monitors that the four-claw pressure head 2045, the flat plate pressure head 2046, the IGBT crimping component 500 and the thyristor crimping component 600 reach a preset distance through displacement sensors on the active oil cylinder I2041 and the active oil cylinder II 2042, the feed speed of the active oil cylinder I2041 and the active oil cylinder II 2042 is reduced, the IGBT crimping component 500 and the thyristor crimping component 600 are continuously pressed at the speed of 2-3mm/S until the compression value reaches a preset value, a sounder sends out an audible and visual indication, and the oil press 200 enters a pressure maintaining state, an operator tightens the locking nuts on the IGBT crimping assembly 500 and the thyristor crimping assembly 600 respectively;
step 4: after the oil press 200 enters a pressure maintaining state, the system automatically monitors the compression force values of the driving oil cylinder I2041 and the driving oil cylinder II 2042, controls the starting and stopping of the driving oil cylinder I2041 and the driving oil cylinder II 2042 through an oil cylinder servo controller, and performs pressure compensation on the compression force values, so that hydraulic oil internal seepage caused by poor sealing or aging of sealing of a hydraulic circuit is prevented, and compression force value deviation is prevented;
step 5: after the locking nuts on the IGBT crimping component 500 and the thyristor crimping component 600 are tightened, the driving oil cylinder I2041 and the driving oil cylinder II 2042 are withdrawn, and similarly, the driving oil cylinder I2041 and the driving oil cylinder II 2042 firstly slowly leave the IGBT crimping component 500 and the thyristor crimping component 600 at the speed of 2-3mm/S to a preset distance and then quickly retract to the initial position at the speed of 5-8 mm/S;
step 6: finally, the supporting oil cylinder 2034 drives the common bearing head 2031, the compensation bearing head 2032 and the supporting beam 2033 to retreat to the initial position; after the support cylinder 2034 is retracted to the proper position, the limit cylinder 2036 is started and retracted to drive the limit arm 2035 to rotate to the initial position, and the crimping process is finished.
Compared with the prior art, the invention has the beneficial effects that:
before crimping, the IGBT crimping component 500 and the thyristor crimping component 600 which are clamped are positioned, stacked and placed to enter a crimping station (between the supporting seat assembly 203 and the pressure head assembly 204) along with a crimping production line, and the flexible direct converter valve power unit crimping equipment meets the requirement of one-time accurate crimping of the IGBT crimping component and the thyristor crimping component, so that the problems of IGBT damage, poor crimping quality and low crimping efficiency caused by multiple times of crimping are solved; in addition, a PLC control cabinet is used for controlling a hydraulic system (oil cylinder) to crimp the full-bridge power unit and the half-power unit of the flexible-straight converter valve, and the consistency of the crimping process and crimping data have traceability.
The invention has the advantages of convenient operation, high accuracy, safety, reliability, practicality and high efficiency.
Drawings
FIG. 1 is a schematic diagram of a control cabinet 101 according to the present invention; wherein: FIG. 1(a) is a side view of a control cabinet 101; fig. 1(b) is a front view of the control cabinet 101.
Fig. 2 is a front view of the hydraulic press 200 according to the present invention.
Fig. 3 is a side view of the structure of the hydraulic press 200 according to the present invention.
Fig. 4 is a top view of the hydraulic press 200 according to the present invention.
FIG. 5 is a schematic view of the support seat assembly 203 in a non-operating state.
Fig. 6 is a schematic structural diagram of the locking key 2049 according to the present invention.
Fig. 7 is a schematic diagram of a flexible direct current converter valve power unit assembly crimping in an embodiment of the invention.
In the figure: 100. a cabinet; 101. a PLC control cabinet; 102. a display console; 200. an oil press; 201. a machine base; 202. a body; 203. a support seat assembly; 2031. a common bearing head; 2032. compensating the bearing head; 2033. a support beam; 2034. a support cylinder; 2035. a limiting arm; 2036. a limiting oil cylinder; 2037. a compensator; 204. a ram assembly; 2041. an active oil cylinder I; 2042. an active oil cylinder II; 2043. a pressure sensor I; 2044. a pressure sensor II; 2045. a four-jaw press head; 2046. a flat plate pressure head; 2047. a guide bar; 2048. a sliding sleeve fixing seat; 2049. a card key; 300. a crimping assembly line; 400. a positioning device; 500. an IGBT crimping component; 501. a metal tie rod; 502. a nut; 600. the thyristor is connected to the component.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 3, a flexible direct converter valve power unit crimping apparatus includes a cabinet 100 and an oil press 200; the cabinet 100 comprises a PLC control cabinet 101, and a display operation platform 102 is arranged above the PLC control cabinet 101; the oil press 200 comprises a base 201, the top of the base 201 is connected with the bottom of a machine body 202, and a support seat assembly 203 and a pressure head assembly 204 are respectively arranged at two ends of the top of the machine body 202; the support seat assembly (203) and the pressure head assembly (204) in the oil press (200) are controlled by the PLC control cabinet (101), and the IGBT compression joint assembly (500) and the thyristor compression joint assembly (600) are subjected to one-time compression joint; and a PLC control cabinet (101) is used for controlling the hydraulic oil cylinder to crimp the full-bridge power unit and the half-power unit of the flexible direct current converter valve.
Referring to fig. 4 to 7, the support seat assembly 203 includes a support cylinder 2034, a cylinder end of the support cylinder 2034 is connected to a top of the body 202, a piston end of the support cylinder 2034 is connected to a bottom end of the support beam 2033, a front end of the support beam 2033 is connected to a connecting end of the common bearing head 2031 and the compensation bearing head 2032, and a compensator 2037 is disposed at a free end of the compensation bearing head 2032; the two sides of the supporting oil cylinder 2034 are respectively provided with a limiting oil cylinder 2036, the end of the limiting oil cylinder 2036 is connected with the top of the body 202, the end of the piston of the limiting oil cylinder 2036 is connected with one end of a limiting arm 2035, and the other end of the limiting arm 2035 is in an extending state and is abutted against the supporting beam 2033 to support the supporting beam 2033.
The pressure head assembly 204 comprises an active oil cylinder I2041 and an active oil cylinder II 2042, the cylinder ends of the active oil cylinder I2041 and the active oil cylinder II 2042 are connected with the top of the machine body 202, the front end of the piston end of the active oil cylinder I2041 is sequentially connected with a pressure sensor I2043 and a four-jaw pressure head 2045, the front end of the piston end of the active oil cylinder II 2042 is sequentially connected with a pressure sensor II 2044 and a flat-plate pressure head 2046, the rear end of the four-jaw pressure head 2045 and the rear end of the flat-plate pressure head 2046 are respectively provided with a sliding sleeve fixing seat 2048, the bottom end of the sliding sleeve fixing seat 2048 is fixed at the top of the machine body 202, a telescopic guide rod 2047 penetrates through the sliding sleeve fixing seat 2048, and the two telescopic guide rods 2047 are respectively and correspondingly connected between the cylinder body of the active oil cylinder I2041 and the four-jaw pressure head 2045 and between the cylinder body of the active oil cylinder II 2042 and the flat-plate pressure head 2046 and move back and forth in the corresponding sliding sleeve fixing seat 2048 along with the expansion of the active oil cylinder I2041 and the active oil cylinder II 2042; the guide rod 2047 is used for preventing the four-jaw ram 2045 and the flat ram 2046 from rotating in the process of stretching or pressing along with the master cylinder I2041 and the master cylinder II 2042.
Referring to fig. 2, the body 202 is in a saddle shape with two high ends and a low middle, two ends of the top of the body 202 are detachably connected with the bottoms of the support seat assembly 203 and the pressure head assembly 204 through bolts, and a clamping key 2049 is further arranged between the bottoms of the support seat assembly 203 and the pressure head assembly 204 and two ends of the top of the body 202, so that the support seat assembly 203 and the pressure head assembly 204 are prevented from sliding relative to each other with the clamping key 2049 in the process of applying force to the oil cylinder by the oil press 200, and the pressing precision of the pressing connection is prevented from being affected.
The compensation force bearing head 2032 can be provided with different compensators 2037 to match the compression joint of the half-bridge power unit and the full-bridge power unit of the flexible-direct converter valve.
And displacement sensors are respectively arranged at the piston end of the supporting oil cylinder 2034, the piston end of the limiting oil cylinder 2036, and the piston ends of the driving oil cylinder I2041 and the driving oil cylinder II 2042.
An air switch, a relay and a PLC controller are integrated in the PLC control cabinet 101, wherein the air switch is used for power control of the whole control cabinet, and the power output end of the air switch is connected with the 24VDC power input end of the PLC controller through the relay; the signal input end of the PLC controller is respectively connected with the piston end of the supporting oil cylinder 2034, the piston end of the limiting oil cylinder 2036, the signal output ends of displacement sensors on the piston ends of the driving oil cylinder I2041 and the driving oil cylinder II 2042, and the signal output ends of the pressure sensor I2043 and the pressure sensor II 2044, the signal output end of the PLC controller is respectively connected with the signal input ends of a display screen and a buzzer on the display operation table 102, and the signal output end of the PLC controller controls the telescopic motion of the oil cylinders through the piston end of the supporting oil cylinder 2034, the piston end of the limiting oil cylinder 2036, the servo controllers of the driving oil cylinder I2041 and the driving oil cylinder II 2042.
The bottom of the cabinet 100 is provided with casters, so that the cabinet 100 can be placed around the oil press 200 according to the use requirement.
A crimping method of flexible direct current converter valve power unit crimping equipment specifically comprises the following steps:
stp 1: presetting a pressure gear within the maximum pressing force range of the oil press 200 through a PLC controller according to needs, and setting a single-cylinder working mode or a multi-cylinder working mode and related parameters according to crimping needs; according to the half-bridge unit or the full-bridge power unit of the flexible-direct converter valve, a corresponding compensator 2037 is installed on the compensation bearing head 2032; accurately stacking, clamping and positioning each device of the IGBT crimping assembly 500 and the thyristor crimping assembly 600 on the crimping assembly line 300 through the positioning device 400 on the assembly line 300, and conveying the devices to a crimping station along with the crimping assembly line 300;
stp 2: turning on a power supply, selecting a corresponding pressure gear within a preset pressure gear of Stp1, starting the supporting oil cylinder 2034, extending a piston end of the supporting oil cylinder 2034, extending the common bearing head 2031, the compensation bearing head 2032 and the supporting beam 2033 along with the supporting oil cylinder 2034, transmitting a displacement signal to a PLC (programmable logic controller) by a displacement sensor of the supporting oil cylinder 2034, starting the limit oil cylinder 2036 after the PLC monitors that the supporting oil cylinder 2034 extends to a mechanical supporting position, driving the limit arm 2035 to rotate and extend, and transmitting the displacement signal to the PLC by the displacement sensor of the limit oil cylinder 2036;
stp 3: when the PLC monitors that the limit oil cylinder 2036 extends out of the mechanical support position, an active oil cylinder I2041 and an active oil cylinder II 2042 of the oil press 200 are selected to be started simultaneously or independently as required, the active oil cylinder I2041 and the active oil cylinder II 2042 drive a four-claw pressure head 2045 and a flat plate pressure head 2046 to move towards the crimping component respectively at the speed of 5-8mm/S, when the system monitors that the four-claw pressure head 2045, the flat plate pressure head 2046, the IGBT crimping component 500 and the thyristor crimping component 600 reach a preset distance through displacement sensors on the active oil cylinder I2041 and the active oil cylinder II 2042, the feed speed of the active oil cylinder I2041 and the active oil cylinder II 2042 is reduced, the IGBT crimping component 500 and the thyristor crimping component 600 are continuously pressed at the speed of 2-3mm/S until the compression value reaches a preset value, a sounder sends out an audible and visual indication, and the oil press 200 enters a pressure maintaining state, an operator tightens the locking nuts on the IGBT crimping assembly 500 and the thyristor crimping assembly 600 respectively; because the length of the IGBT crimping component 500 is relatively long, two persons are needed to cooperate to tighten the nut 502 arranged at the other end of the metal pull rod 501 in the IGBT crimping component 500 in the past, and after the screw head of the metal pull rod 501 is compressed by the four-claw pressing head 2045, the nut 502 at the other end of the metal pull rod 501 can be tightened by only one manpower, so that the manpower is greatly saved;
step 4: after the oil press 200 enters a pressure maintaining state, the system automatically monitors the compression force values of the driving oil cylinder I2041 and the driving oil cylinder II 2042, controls the starting and stopping of the driving oil cylinder I2041 and the driving oil cylinder II 2042 through an oil cylinder servo controller, and performs pressure compensation on the compression force values, so that hydraulic oil internal seepage caused by poor sealing or aging of sealing of a hydraulic circuit is prevented, and compression force value deviation is prevented;
step 5: after the locking nuts on the IGBT crimping component 500 and the thyristor crimping component 600 are tightened, the driving oil cylinder I2041 and the driving oil cylinder II 2042 are withdrawn, and similarly, the driving oil cylinder I2041 and the driving oil cylinder II 2042 firstly slowly leave the IGBT crimping component 500 and the thyristor crimping component 600 at the speed of 2-3mm/S to a preset distance and then quickly retract to the initial position at the speed of 5-8 mm/S; by adjusting the feeding and withdrawing speeds of the driving oil cylinder I2041 and the driving oil cylinder II 2042 at different stages, the impact on the crimping component caused by the contact or the separation of the four-claw pressure head 2045 and the flat plate pressure head 2046 with or from the crimping component is reduced, and the crimping efficiency is improved under the condition of ensuring stable and ordered crimping;
step 6: finally, the supporting oil cylinder 2034 drives the common bearing head 2031, the compensation bearing head 2032 and the supporting beam 2033 to retreat to the initial position; after the support cylinder 2034 is retracted to the proper position, the limit cylinder 2036 is started and retracted to drive the limit arm 2035 to rotate to the initial position, and the crimping process is finished.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Claims (8)
1. The flexible direct current converter valve power unit crimping equipment comprises a cabinet (100) and an oil press (200); the method is characterized in that: the cabinet (100) comprises a PLC control cabinet (101), and a display operation table (102) is arranged above the PLC control cabinet (101); the oil press (200) comprises a base (201), the top of the base (201) is connected with the bottom of a machine body (202), and a supporting seat assembly (203) and a pressure head assembly (204) are respectively arranged at two ends of the top of the machine body (202); the support seat assembly (203) and the pressure head assembly (204) in the oil press (200) are controlled by the PLC control cabinet (101), and the IGBT compression joint assembly (500) and the thyristor compression joint assembly (600) are subjected to one-time compression joint; the PLC control cabinet (101) is used for controlling the hydraulic oil cylinder to carry out compression joint on the full-bridge power unit and the half-power unit of the flexible direct current converter valve.
2. The compliant converter valve power cell crimping apparatus of claim 1, wherein: the supporting seat assembly (203) comprises a supporting oil cylinder (2034), the cylinder end of the supporting oil cylinder (2034) is connected with the top of the machine body (202), the piston end of the supporting oil cylinder (2034) is connected with the bottom end of a supporting beam (2033), the front end of the supporting beam (2033) is respectively connected with the connecting ends of a common bearing head (2031) and a compensation bearing head (2032), and a compensator (2037) is arranged at the free end of the compensation bearing head (2032); two sides of the supporting oil cylinder (2034) are respectively provided with a limiting oil cylinder (2036), the cylinder body end of the limiting oil cylinder (2036) is connected with the top of the machine body (202), the piston end of the limiting oil cylinder (2036) is connected with one end of a limiting arm (2035), and the other end of the limiting arm (2035) is abutted against the supporting beam (2033) in an extending state to support the supporting beam (2033).
3. The compliant converter valve power cell crimping apparatus of claim 1, wherein: the pressure head assembly (204) comprises an active oil cylinder I (2041) and an active oil cylinder II (2042), the cylinder body ends of the active oil cylinder I (2041) and the active oil cylinder II (2042) are connected with the top of the machine body (202), the front end of the piston end of the active oil cylinder I (2041) is sequentially connected with a pressure sensor I (2043) and a four-jaw pressure head (2045), the front end of the piston end of the active oil cylinder II (2042) is sequentially connected with a pressure sensor II (2044) and a flat pressure head (2046), the rear end of the four-jaw pressure head (2045) and the rear end of the flat pressure head (2046) are respectively provided with a sliding sleeve fixing seat (2048), the bottom end of the sliding sleeve fixing seat (2048) is fixed on the top of the machine body (202), a telescopic guide rod (2047) penetrates through the sliding sleeve fixing seat (2048), the two telescopic guide rods (2047) are respectively and correspondingly connected between the cylinder body of the active oil cylinder I (2041) and the four-jaw pressure head (2045), and the cylinder body of the active oil cylinder II (2042) and the flat pressure head (2046), and along with the extension and retraction of the driving oil cylinder I (2041) and the driving oil cylinder II (2042), the sliding sleeve moves back and forth in the corresponding sliding sleeve fixing seat (2048).
4. The compliant converter valve power cell crimping apparatus of claim 1, wherein: fuselage (202) are both ends height, and the saddle shape that the centre is low, and fuselage (202) top both ends are connected through the bottom of bolt and supporting seat assembly (203) and pressure head assembly (204) can be dismantled respectively, between the bottom of supporting seat assembly (203) and pressure head assembly (204) and fuselage (202) top both ends, still are equipped with card key (2049).
5. A compliant converter valve power cell crimp connection apparatus as claimed in claim 2 wherein: the compensation bearing head (2032) is provided with different compensators (2037) according to the needs to match the compression joint of the half-bridge power unit and the full-bridge power unit of the flexible-direct converter valve.
6. A compliant converter valve power cell crimp connection apparatus as claimed in claim 2 wherein: and displacement sensors are respectively arranged at the piston end of the supporting oil cylinder (2034), the piston end of the limiting oil cylinder (2036), and the piston ends of the driving oil cylinder I (2041) and the driving oil cylinder II (2042).
7. The compliant converter valve power cell crimping apparatus of claim 1, wherein: an air switch, a relay and a PLC controller are integrated in the PLC control cabinet (101), wherein the air switch is used for power control of the whole control cabinet, and the power output end of the air switch is connected with the 24VDC power input end of the PLC controller through the relay; the signal input end of the PLC controller is respectively connected with the piston end of a supporting oil cylinder (2034), the piston end of a limiting oil cylinder (2036), the signal output ends of displacement sensors on the piston ends of an active oil cylinder I (2041) and an active oil cylinder II (2042), and the signal output ends of a pressure sensor I (2043) and a pressure sensor II (2044), the signal output end of the PLC controller is respectively connected with the display screen on a display operation table (102) and the signal input end of a buzzer, and the signal output end of the PLC controller also controls the telescopic motion of the oil cylinders through the piston end of the supporting oil cylinder (2034), the piston end of the limiting oil cylinder (2036), the servo controllers of the active oil cylinder I (2041) and the active oil cylinder II (2042).
8. The flexible direct current converter valve power unit crimping equipment based on any one of claims 1 to 7 is characterized in that: the method specifically comprises the following steps:
stp 1: presetting a pressure gear within the maximum pressing force range of the oil press (200) through a PLC (programmable logic controller) as required, and setting a single-cylinder working mode or a multi-cylinder working mode and related parameters as required by compression; according to the flexible direct current converter valve half-bridge unit or full-bridge power unit, a corresponding compensator (2037) is installed on a compensation bearing head (2032); accurately stacking and clamping each device of the IGBT crimping assembly (500) and the thyristor crimping assembly (600) on the crimping assembly line (300) through a positioning device (400) on the assembly line (300), and conveying the devices to a crimping station along with the crimping assembly line (300);
stp 2: the method comprises the steps that a power supply is turned on, a corresponding pressure gear is selected in a preset pressure gear of Stp1, a supporting oil cylinder (2034) is started, a piston end of the supporting oil cylinder extends out, a common bearing head (2031), a compensation bearing head (2032) and a supporting beam (2033) extend out along with the supporting oil cylinder (2034), a displacement sensor of the supporting oil cylinder (2034) transmits a displacement signal to a PLC (programmable logic controller), after the PLC monitors that the supporting oil cylinder (2034) extends out to a mechanical supporting position, a limiting oil cylinder (2036) is started to drive a limiting arm (2035) to extend out in a rotating mode, and the displacement sensor of the limiting oil cylinder (2036) transmits the displacement signal to the PLC;
stp 3: when a PLC controller monitors that a limit oil cylinder (2036) extends to a mechanical support position, an active oil cylinder I (2041) and an active oil cylinder II (2042) of an oil press (200) are selected to be started simultaneously or independently as required, the active oil cylinder I (2041) and the active oil cylinder II (2042) drive a four-jaw pressure head (2045) and a flat pressure head (2046) to move towards a crimping component respectively at the speed of 5-8mm/S, when a system monitors that the four-jaw pressure head (2045), the flat pressure head (2046), an IGBT crimping component (500) and a thyristor crimping component (600) to a preset distance through displacement sensors on the active oil cylinder I (2041) and the active oil cylinder II (2042), the feeding speeds of the active oil cylinder I (2041) and the active oil cylinder II (2042) are reduced, and the pressure is continuously applied to the IGBT crimping component (500) and the thyristor crimping component (600) at the speed of 2-3mm/S, until the compaction force value reaches a preset value, the audible and visual indicator is sent by the audible indicator, the oil press (200) enters a pressure maintaining state, and an operator respectively tightens the locking nuts on the IGBT compression joint assembly (500) and the thyristor compression joint assembly (600);
step 4: after the oil press (200) enters a pressure maintaining state, the system automatically monitors the compression force values of the driving oil cylinder I (2041) and the driving oil cylinder II (2042), controls the starting and stopping of the driving oil cylinder I (2041) and the driving oil cylinder II (2042) through an oil cylinder servo controller, performs pressure compensation on the compression force values, and prevents hydraulic oil from leaking inwards to generate compression force value deviation due to poor sealing or aging sealing of a hydraulic circuit;
step 5: after tightening of locking nuts on the IGBT crimping component (500) and the thyristor crimping component (600), withdrawing the driving oil cylinder I (2041) and the driving oil cylinder II (2042), in a similar way, slowly leaving the IGBT crimping component (500) and the thyristor crimping component (600) to a preset distance at the speed of 2-3mm/S by the driving oil cylinder I (2041) and the driving oil cylinder II (2042), and then quickly retracting to an initial position at the speed of 5-8 mm/S;
step 6: finally, the supporting oil cylinder (2034) drives the common bearing head (2031), the compensation bearing head (2032) and the supporting beam (2033) to return to the initial position; when the supporting oil cylinder (2034) is retracted to the right position, the limiting oil cylinder (2036) is started and retracted to drive the limiting arm (2035) to rotate to the initial position, and the crimping process is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111234554.4A CN113909859A (en) | 2021-10-22 | 2021-10-22 | Flexible direct current converter valve power unit crimping equipment and crimping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111234554.4A CN113909859A (en) | 2021-10-22 | 2021-10-22 | Flexible direct current converter valve power unit crimping equipment and crimping method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113909859A true CN113909859A (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111234554.4A Pending CN113909859A (en) | 2021-10-22 | 2021-10-22 | Flexible direct current converter valve power unit crimping equipment and crimping method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113909859A (en) |
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2021
- 2021-10-22 CN CN202111234554.4A patent/CN113909859A/en active Pending
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