A high-efficiency, high-power, high-voltage frequency conversion integrated machine

Abstract

The present invention belongs to the technical field of high-voltage variable-frequency motors, and specifically relates to an efficient and high-power high-voltage variable-frequency integrated machine, which comprises a high-voltage frequency converter, a motor housing and a motor, wherein the motor is arranged inside the motor housing, the high-voltage frequency converter is fixedly installed on one side of the motor housing, a through hole is opened on the rear side of the motor housing, and a heat dissipation cavity is fixedly provided on the inner wall of the through hole, and a heat dissipation net is threadedly connected to the rear side of the heat dissipation cavity; a high-power heat dissipation mechanism is arranged inside the heat dissipation cavity, and the high-power heat dissipation mechanism comprises four slide rails, a mounting rod, an electric motor and fan blades; the four slide rails are fixedly installed on the inner wall of the heat dissipation cavity, the mounting rod is slidably connected to the four slide rails, and the electric motor is fixedly installed in the middle of the mounting rod. The device solves the problem that the current high-voltage variable-frequency integrated motor is damaged due to excessive internal temperature of the motor due to long-term high-power operation and poor heat dissipation performance during use.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-voltage variable-frequency motors, and in particular relates to a high-efficiency, high-power, high-voltage variable-frequency integrated machine. Background Art

[0002] At present, the high-voltage motors and frequency converters used in power plants are integrated into one unit, which can save space relatively. However, this integrated high-voltage frequency converter motor is subject to structural and functional defects, and has poor reliability during use. During the long-term operation of the high-voltage frequency converter motor, the heat dissipation effect of the box is poor, which can easily cause the temperature of the motor itself to rise too quickly and the frequency converter operation to fail. This phenomenon has become a problem that needs to be solved urgently by people in this field. Summary of the invention

[0003] The purpose of the present invention is to provide a high-efficiency, high-power, high-voltage frequency conversion integrated machine to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: an efficient, high-power, high-voltage frequency conversion integrated machine, comprising a high-voltage frequency converter, a motor housing and a motor, the motor being arranged inside the motor housing, the high-voltage frequency converter being fixedly installed on one side of the motor housing, a through hole being opened on the rear side of the motor housing, and a heat dissipation cavity being fixedly provided on the inner wall of the through hole, a heat dissipation net being threadedly connected to the rear side of the heat dissipation cavity; a high-power heat dissipation mechanism is arranged inside the heat dissipation cavity, the high-power heat dissipation mechanism comprises four slide rails, a mounting rod, an electric motor and fan blades; the four slide rails are fixedly installed on the inner wall of the heat dissipation cavity, the mounting rod is slidably connected to the four slide rails, the electric motor is fixedly installed in the middle of the mounting rod, and the fan blades are fixedly connected to the output end of the electric motor.

[0005] Preferably, the fan blade includes a connecting disk, four placement blocks, four centrifugal rods, two arc disks and two spheres; the connecting disk is fixedly installed on one side of the fan blade, the four placement blocks are evenly distributed and fixed around the connecting disk, the outer ends of the four placement blocks are all provided with grooves, and the four centrifugal rods are respectively connected to the inner wall axes of the grooves of the four placement blocks; the two arc disks are both axially connected to the inner wall of the heat dissipation cavity and are arranged opposite to each other, the two spheres are respectively fixedly installed in the middle of the two arc disks and are in contact with the outer ends of the centrifugal rods, and the outer ends of the four centrifugal rods are all arc-shaped.

[0006] Preferably, the electric motor is connected to the motor wire and is internally provided with a high-power heat dissipation system; the high-power heat dissipation system includes a speed judgment module and a speed execution module, the speed judgment module is electrically connected to the motor, the speed execution module is electrically connected to the speed judgment module, the speed judgment module is used to judge the speed of the motor, and the speed execution module is used to control the speed of the electric motor according to the speed of the motor.

[0007] Preferably, the operation steps of the high-power heat dissipation system include: step S1, the motor runs at high power, and the high-power heat dissipation system runs synchronously; step S2, judging the speed of the motor through the speed judgment module, and controlling the speed of the electric motor according to the speed of the motor, thereby adjusting the heat dissipation power; step S3, under the action of centrifugal force, the arc disk rotates around the axis, and the size of the heat dissipation port is adjusted according to the motor speed; step S4, the motor stops running, and the high-power heat dissipation system stops running.

[0008] Preferably, in step S2, Where, V is the speed of the electric motor, V max is the maximum speed of the electric motor, V 电 is the motor speed, V 电max is the maximum speed of the motor.

[0009] Preferably, in step S3, Among them, R is the opening size between the two arc disks, r max It is the maximum opening between two arc disks.

[0010] Preferably, the arc disk includes an arc rod, a hydraulic chamber, a hydraulic plate, and an elastic telescopic rod; the hydraulic chamber is fixedly mounted on the inner wall of the heat dissipation chamber, the hydraulic plate is slidably connected to the inner wall of the hydraulic chamber, and is fixedly connected to the surface of the arc disk through the arc rod, and the elastic telescopic rod is fixedly mounted between the mounting rod and the motor; the elastic telescopic rod is connected to the outer end of the hydraulic chamber with an inlet pipe and a discharge pipe, a pressure valve is arranged in the inlet pipe, an electric control valve is arranged in the discharge pipe, the electric control valve is electrically connected to the motor, and the opening and closing of the motor corresponds to the closing and opening of the electric control valve.

[0011] Preferably, a striking rod is fixed on the surface of the connecting disk, and a striking ball is installed on the outer end bearing of the striking rod.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention adopts a high-power heat dissipation system and a high-power heat dissipation mechanism, which realizes automatic and rapid heat dissipation, and enables the four centrifugal rods to generate centrifugal force, and the four centrifugal rods are thrown away by axially expanding outward, and the four centrifugal rods are in contact with the sphere of the arc disk, and push the arc disk to rotate around the axis, and the two arc disks are opened to increase the air flow channel, thereby enhancing heat dissipation, and the two arc disks can be closed later to block dust from entering the motor, thereby playing a role in efficiently protecting the motor;

[0013] When the arc disk opening is larger, the elastic telescopic rod is extended, thereby driving the mounting rod to slide along the inner walls of the four slide rails, and the fan blades are driven by the electric motor to move, and the fan blades drive the connecting disk to move and drive the centrifugal rod to move, thereby expanding the arc disk to the greatest extent, thereby maximizing the opening of the arc disk. At this time, the operating power of the motor is maximized, thereby maximizing heat dissipation and fully protecting the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the installation position of the heat dissipation cavity and the heat dissipation net of the present invention;

[0017] Figure 3 It is a schematic diagram of the front structure of the heat dissipation cavity of the present invention;

[0018] Figure 4 It is a schematic diagram of the rear structure of the heat dissipation cavity of the present invention;

[0019] Figure 5 It is a schematic diagram of the relative positions of the centrifugal rod and the arc disk of the present invention;

[0020] Figure 6 It is a schematic diagram of the pipeline connection mode between the hydraulic chamber and the elastic telescopic rod of the present invention;

[0021] In the figure: 1. motor housing; 2. high-voltage inverter; 3. heat dissipation chamber; 4. heat dissipation net; 5. slide rail; 6. mounting rod; 7. electric motor; 8. fan blade; 81. connecting plate; 811. impact rod; 812. impact ball; 82. placement block; 821. centrifugal rod; 83. arc disk; 831. sphere; 832. arc rod; 833. hydraulic chamber; 834. hydraulic plate; 835. elastic telescopic rod. DETAILED DESCRIPTION

[0022] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-6The present invention provides a technical solution: an efficient, high-power, high-voltage frequency conversion integrated machine, comprising a high-voltage frequency converter 2, a motor housing 1, and a motor, wherein the motor is arranged inside the motor housing 1, the high-voltage frequency converter 2 is fixedly installed on one side of the motor housing 1, a through hole is opened on the rear side of the motor housing 1, and a heat dissipation cavity 3 is fixed on the inner wall of the through hole, and a heat dissipation net 4 is threadedly connected to the rear side of the heat dissipation cavity 3;

[0024] A high-power heat dissipation mechanism is arranged inside the heat dissipation cavity 3, and the high-power heat dissipation mechanism includes four slide rails 5, a mounting rod 6, an electric motor 7, and fan blades 8;

[0025] The four slide rails 5 are fixedly mounted on the inner wall of the heat dissipation cavity 3, the mounting rod 6 is slidably connected in the four slide rails 5, the electric motor 7 is fixedly mounted in the middle of the mounting rod 6, and the fan blade 8 is fixedly connected to the output end of the electric motor 7;

[0026] The motor is running, and the high-voltage inverter 2 is used to realize efficient and high-power operation of the motor, and integrated installation is realized to save space. At this time, the temperature of the motor housing 1 rises due to the high-power operation of the motor, and the high-power heat dissipation mechanism is operated, and the electric motor 7 is started, driving the fan blades 8 to rotate at a high speed, and the temperature in the motor housing 1 is transmitted from the heat dissipation network 4 through the airflow, so as to quickly dissipate heat and have a good heat dissipation effect. The high-power running motor through heat dissipation can avoid the internal temperature being too high to damage the motor, thereby playing a role in protecting the high-power running motor.

[0027] The fan blade 8 includes a connecting disk 81, four placement blocks 82, four centrifugal rods 821, two arc disks 83 and two spheres 831;

[0028] The connecting plate 81 is fixedly mounted on one side of the fan blade 8, and four placement blocks 82 are evenly distributed and fixed around the connecting plate 81. The outer ends of the four placement blocks 82 are all provided with grooves, and the four centrifugal rods 821 are respectively connected to the inner wall axes of the grooves of the four placement blocks 82;

[0029] The two arc disks 83 are both axially connected to the inner wall of the heat dissipation cavity 3 and are arranged opposite to each other. The two spheres 831 are respectively fixedly installed in the middle of the two arc disks 83 and are in contact with the outer ends of the centrifugal rods 821. The outer ends of the four centrifugal rods 821 are all arc-shaped.

[0030] When the fan blades 8 rotate at high speed, the connecting disk 81 is driven to rotate at high speed, so that the four centrifugal rods 821 generate centrifugal force, and the four centrifugal rods 821 are thrown away by axially expanding outward. The four centrifugal rods 821 contact the sphere 831 of the arc disk 83 and push the arc disk 83 to rotate around the axis. The two arc disks 83 are opened to increase the air flow channel, thereby enhancing heat dissipation, and the two arc disks 83 can be closed subsequently to prevent dust from entering the motor, thereby playing a role in efficiently protecting the motor.

[0031] The electric motor 7 is connected to the motor wire and is provided with a high-power heat dissipation system inside;

[0032] The high-power heat dissipation system includes a speed judgment module and a speed execution module. The speed judgment module is electrically connected to the motor, and the speed execution module is electrically connected to the speed judgment module. The speed judgment module is used to judge the speed of the motor, and the speed execution module is used to control the speed of the electric motor 7 according to the speed of the motor.

[0033] The operation steps of the high-power cooling system include:

[0034] Step S1, the motor runs at high power, and the high-power cooling system runs synchronously;

[0035] Step S2, judging the speed of the motor through the speed judging module, and controlling the speed of the electric motor 7 according to the speed of the motor, thereby adjusting the heat dissipation power;

[0036] Step S3: Under the action of centrifugal force, the arc disk 83 rotates around the axis, and the size of the heat dissipation port is adjusted according to the motor speed;

[0037] Step S4: the motor stops running, and the high-power cooling system stops running.

[0038] In step S2, Wherein, V is the speed of the electric motor 7, V max is the maximum speed of the electric motor 7, v 电 is the motor speed, v 电max is the maximum speed of the motor;

[0039] The higher the motor operating power, the faster the speed, and the higher the speed of the electric motor 7, which increases the heat dissipation efficiency on the one hand, and reduces energy consumption when the motor operating power is low on the other hand, while also ensuring heat dissipation.

[0040] In step S3, Among them, r is the opening size between the two arc disks 83, r max is the maximum opening between the two arc disks 83;

[0041] The higher the motor operating power, the higher the temperature generated inside. At this time, the opening size between the arc disks 83 is increased, so that the heat dissipation efficiency can be further improved. When the temperature is low, it can not only ensure heat dissipation but also relatively reduce the entry of dust, thereby blocking the dust. When the motor is completely turned off, the arc disks 83 remain parallel, which can block dust from entering the motor to the greatest extent and protect the motor.

[0042] The arc disk 83 includes an arc rod 832, a hydraulic chamber 833, a hydraulic plate 834, and an elastic telescopic rod 835;

[0043] The hydraulic chamber 833 is fixedly mounted on the inner wall of the heat dissipation chamber 3, the hydraulic plate 834 is slidably connected to the inner wall of the hydraulic chamber 833, and is fixedly connected to the surface of the arc plate 83 through the arc rod 832, and the elastic telescopic rod 835 is fixedly mounted between the mounting rod 6 and the motor;

[0044] The elastic telescopic rod 835 is connected to the outer end of the hydraulic chamber 833 with a liquid inlet pipe and a liquid discharge pipe. A pressure valve is provided in the liquid inlet pipe, and an electric control valve is provided in the liquid discharge pipe. The electric control valve is electrically connected to the motor, and the opening and closing of the motor corresponds to the closing and opening of the electric control valve.

[0045] During the rotation of the arc disk 83 around the axis, the arc rod 832 drives the hydraulic plate 834 to slide along the inner wall of the hydraulic cavity 833. mid When R mid The normal opening size between the two arc disks 83 is the size of the opening. At this time, the hydraulic pressure in the liquid inlet pipe reaches the bearing limit of the pressure valve, so that the pressure valve opens, and the liquid quickly enters the elastic telescopic rod 835 through the liquid inlet pipe, causing it to stretch, thereby driving the mounting rod 6 to slide along the inner wall of the four slide rails 5, and the fan blades 8 are driven by the electric motor 7 to move, and the fan blades 8 drive the connecting disk 81 to move and drive the centrifugal rod 821 to move, thereby expanding the arc disk 83 to the maximum extent, so that R=R max , thereby maximally opening the arc disk 83. At this time, the operating power of the motor is maximized, thereby maximizing the heat dissipation and fully protecting the motor. After the motor stops running, the electric control valve opens, and the elastic force generated by the elastic telescopic rod 835 discharges the liquid into the hydraulic chamber 833 through the drain pipe, thereby resetting the arc disk 83 and closing the two arc disks 83 to reduce dust from entering the motor. After the motor is started again, the electric control valve is closed again.

[0046] A striking rod 811 is fixed on the surface of the connecting plate 81, and a striking ball 812 is installed on the outer end bearing of the striking rod 811;

[0047] Through the above steps, the connecting plate 81 moves, driving the impact rod 811 to move, and the impact rod 811 drives the impact ball 812 to impact the inner surface of the heat dissipation net 4, thereby shaking off the dust on the net to prevent the dust from blocking the heat dissipation net 4 and affecting the heat dissipation effect. The impact ball 812 connected by the bearing can make the impact ball 812 rotate after contacting the inner surface of the heat dissipation net 4, thereby reducing the wear of the structure and increasing the service life of the structure.

[0048] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-efficiency, high-power, high-voltage frequency conversion integrated machine, comprising a high-voltage frequency converter (2), a motor housing (1) and a motor, characterized in that: The motor is arranged inside the motor housing (1), the high-voltage frequency converter (2) is fixedly mounted on one side of the motor housing (1), a through hole is provided on the rear side of the motor housing (1), a heat dissipation cavity (3) is fixed on the inner wall of the through hole, and a heat dissipation net (4) is threadedly connected to the rear side of the heat dissipation cavity (3); A high-power heat dissipation mechanism is arranged inside the heat dissipation cavity (3), and the high-power heat dissipation mechanism comprises four slide rails (5), a mounting rod (6), an electric motor (7), and fan blades (8); The four slide rails (5) are all fixedly mounted on the inner wall of the heat dissipation cavity (3); the mounting rod (6) is slidably connected to the four slide rails (5); the electric motor (7) is fixedly mounted in the middle of the mounting rod (6); the fan blade (8) is fixedly connected to the output end of the electric motor (7); the fan blade (8) comprises a connecting disk (81), four placement blocks (82), four centrifugal rods (821), two arc disks (83) and two spheres (831); The connecting plate (81) is fixedly mounted on one side of the fan blade (8), and the four placement blocks (82) are evenly distributed and fixed around the connecting plate (81). The outer ends of the four placement blocks (82) are all provided with grooves, and the four centrifugal rods (821) are respectively connected to the inner wall axes of the grooves of the four placement blocks (82); The two arc disks (83) are both axially connected to the inner wall of the heat dissipation cavity (3) and are arranged opposite to each other. The two spheres (831) are respectively fixedly installed in the middle of the two arc disks (83) and are in contact with the outer ends of the centrifugal rods (821). The outer ends of the four centrifugal rods (821) are all arc-shaped.

2. The high-efficiency, high-power, high-voltage frequency conversion integrated machine according to claim 1, characterized in that: The electric motor (7) is connected to the motor wire and is internally provided with a high-power heat dissipation system; The high-power heat dissipation system comprises a speed determination module and a speed execution module, wherein the speed determination module is electrically connected to the motor, and the speed execution module is electrically connected to the speed determination module, wherein the speed determination module is used to determine the speed of the motor, and the speed execution module is used to control the speed of the electric motor (7) according to the speed of the motor.

3. The high-efficiency, high-power, high-voltage frequency conversion integrated machine according to claim 2, characterized in that: The operation steps of the high-power heat dissipation system include: Step S1, the motor runs at high power, and the high-power cooling system runs synchronously; Step S2, determining the speed of the motor through the speed determination module, and controlling the speed of the electric motor (7) according to the speed of the motor, thereby adjusting the heat dissipation power; Step S3: under the action of centrifugal force, the arc disk (83) rotates around the axis, and the size of the heat dissipation opening is adjusted according to the motor speed; Step S4: the motor stops running, and the high-power cooling system stops running.

4. The high-efficiency, high-power, high-voltage frequency conversion integrated machine according to claim 3, characterized in that: In the step S2, ,in, is the rotation speed of the electric motor (7), is the maximum speed of the electric motor (7), is the motor speed, is the maximum speed of the motor.

5. The high-efficiency, high-power, high-voltage frequency conversion integrated machine according to claim 4, characterized in that: In the step S3, ,in, is the size of the opening between the two arc disks (83), It is the maximum opening between the two arc disks (83).

6. The high-efficiency, high-power, high-voltage frequency conversion integrated machine according to claim 5, characterized in that: The arc disk (83) comprises an arc rod (832), a hydraulic chamber (833), a hydraulic plate (834), and an elastic telescopic rod (835); The hydraulic chamber (833) is fixedly mounted on the inner wall of the heat dissipation chamber (3); the hydraulic plate (834) is slidably connected to the inner wall of the hydraulic chamber (833) and is fixedly connected to the surface of the arc plate (83) via the arc rod (832); and the elastic telescopic rod (835) is fixedly mounted between the mounting rod (6) and the motor; The elastic telescopic rod (835) and the outer end of the hydraulic chamber (833) are connected to a liquid inlet pipe and a liquid discharge pipe, a pressure valve is arranged in the liquid inlet pipe, an electric control valve is arranged in the liquid discharge pipe, the electric control valve is electrically connected to the motor, and the opening and closing of the motor corresponds to the closing and opening of the electric control valve.

7. The high-efficiency, high-power, high-voltage frequency conversion integrated machine according to claim 6, characterized in that: A striking rod (811) is fixed to the surface of the connecting disk (81), and a striking ball (812) is mounted on the outer end bearing of the striking rod (811).

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