Crown block inner control box structure with heat dissipation and dust prevention performance

Abstract

The invention discloses a crown block inner control box structure with heat dissipation and dust prevention performance. A core part is a radiator matched with a space shape. According to the structure, an innovative solution is provided for solving the problems of heat management failure, dust permeation and forced heat dissipation energy consumption of the crown block under the high-temperature and high-dust working conditions. The control box adopts a totally-closed aluminum alloy shell, the surface of the control box is free of holes, and the IP6X protection grade is realized by combining a red copper sealing plate with the thickness of 1.0-2.0 mm and a polyurethane seam sealing glue process; the layered layout technology is adopted inside, the main control board is arranged in a central low-heat area, the power amplifier board and the battery are distributed on the side of a high-heat area, and heat partition management is achieved through the carbon fiber reinforced aluminum-based composite radiator. The power amplifier board radiator adopts a single-side wave-shaped fin design, the wave crest axis of the fin is horizontally aligned with the advancing direction of the crown block, and natural heat dissipation is achieved in cooperation with airflow generated at the running speed of 5-6 meters per second. The structure has the advantages of high thermal management efficiency, excellent dustproof performance, high electromagnetic compatibility and zero additional energy consumption.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of overhead crane rail transportation equipment, specifically to an overhead crane control box structure used in high-temperature and high-dust working conditions, especially a collaborative heat dissipation and dust prevention system of an asymmetric fin radiator and a composite sealing structure. Background Art

[0002] The current wafer transport crane control box structure has the following defects:

[0003] 1. Thermal management failure: Traditional heat dissipation solutions use a front-mounted topology for the amplifier module, resulting in a millimeter-level microscopic air gap between the heating element and the heat sink, with a contact thermal resistance of 0.8-1.2°C·cm. 2 / W; the matching radiators mostly adopt a bilaterally symmetrical fin design, which generates 20-30% wake turbulent kinetic energy loss in the horizontal airflow field, resulting in a heat dissipation efficiency attenuation rate of more than 18%.

[0004] 2. Dust penetration risk: The existing sealing solution relies on a single-layer rubber gasket. Under 2-5Hz vibration conditions, the dust protection level degrades from the initial IP54 to IP42 in just 2000 hours. The layered layout of the control box does not consider the dust settling path, resulting in metal dust with a particle size greater than 5μm invading the circuit board through the gaps between the radiator fins (0.5-1.2mm), causing the signal-to-noise ratio to drop below 65dB.

[0005] 3. Dilemma of forced heat dissipation: Traditional control box heat dissipation improves heat dissipation efficiency by adding axial fans, but this results in additional power consumption of 18-25W (accounting for 10% of the total system power consumption) and induces local turbulence of 1.2-2.5m / s, destroying the natural convection thermal boundary layer. The related heat dissipation design also requires a continuous power supply, which is contrary to the energy-saving design concept of the overhead crane.

[0006] Therefore, it is necessary to propose a new control box structure with high heat dissipation efficiency, good dustproof performance, and natural air cooling to solve the various problems of the current control box in the overhead crane. Summary of the Invention

[0007] The present invention aims to address the shortcomings of the prior art by proposing a control box structure within an overhead crane that exhibits heat dissipation and dustproof properties. This innovative solution addresses the issues of thermal management failure, dust penetration, and energy consumption caused by forced heat dissipation in overhead cranes operating under high-temperature and high-dust conditions.

[0008] The technical solution to achieve the purpose of the present invention is:

[0009] A crane internal control box with heat dissipation and dustproof performance is characterized in that it comprises a crane housing (1) and a crane control box (2); the crane housing (1) is provided with a wireless power supply coil mounting hole (11) and a power control board (12); the crane control box (2) has a radial outer shell formed by the inner hollow portion of the crane housing (1), and is composed of a control box sealing plate (21), a power amplifier board radiator (22), a power amplifier board (23), a power supply radiator (24), a main control board (25) and a battery (26).

[0010] Furthermore, in the overhead crane control box (2), the power amplifier board (23) is provided with a power module (231) for carrying a heating element of the overhead crane control box (2), and the power module (231) is fixed to the back side of the power amplifier board (23) by a welding process; a layer of thermal conductive silicone grease with a thickness of one millimeter is first applied to the heat dissipation surface of the power module (231), and then bolted to the threaded hole (221) of the power amplifier board radiator through the power module pressing hole (232) to form a heat conductive contact interface.

[0011] Furthermore, the power amplifier board radiator (22) has an outer contour adapted to the internal hollow structure of the overhead traveling vehicle housing (1), presenting a three-dimensional configuration with an isosceles trapezoidal cross section and tightly fitting with the overhead traveling vehicle housing (1) and the surface of the power module (231); the radiator fins (241) are provided with a single-sided wavy surface; a power amplifier board radiator threaded hole (221) is reserved on the substrate of the power amplifier board radiator (22), and the power amplifier board radiator (22) is made of a carbon fiber reinforced aluminum-based composite material.

[0012] Furthermore, the power radiator (24) has an outer contour adapted to the internal hollow structure of the overhead traveling vehicle housing (1), presenting a three-dimensional configuration with a right-angled trapezoidal cross section, and is tightly fitted to the overhead traveling vehicle housing (1) and the surface of the battery (26); the radiator fins (241) are provided with a single-sided wavy surface; an array of wire access holes (242) is provided on the plane of the substrate of the power radiator (24), and the material of the power radiator (24) is selected from carbon fiber reinforced aluminum-based composite materials.

[0013] Furthermore, the control box sealing plate (21) is made of a 1.0mm to 2.0mm copper thin plate component, which is fixed to both radial sides of the overhead travelling vehicle housing (1) through threaded connection, and is sealed using a sealing adhesive bonding process.

[0014] Furthermore, the power amplifier board (23), main control board (25), and battery (26) are all closely arranged in layers and placed in different areas according to the amount of heat generated.

[0015] Compared with the prior art, the present invention adopts the above technical solution and has the following beneficial effects:

[0016] (1) Improved thermal management efficiency: The surface temperature difference of the power module is reduced to within 5°C, and the annual heat dissipation efficiency attenuation rate is less than 3%.

[0017] (2) Enhanced dustproof reliability: After a 4-hour vibration test, the IP6X protection level is still maintained, which is basically completely dustproof.

[0018] (3) Zero additional energy consumption: Fully utilize the 2-5m / s natural airflow generated by the operation of the overhead crane, saving more than 10% energy compared to the forced cooling solution.

[0019] (4) Electromagnetic compatibility optimization: Carbon fiber composite materials make the overall magnetization intensity of the control box less than 5×10 -5 T. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall schematic diagram of an overhead crane with a heat dissipation and dustproof performance of an internal control box structure of an overhead crane proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the overhead travelling crane control box structure in the patent of this invention;

[0022] Figure 3 This is a schematic diagram of the radiator fitting parts in the patent of this invention;

[0023] Figure 4 This is a schematic diagram of the front and back of the power amplifier module in the patent of this invention;

[0024] Figure 5 This is a schematic diagram of a single-sided corrugated fin of a radiator in the present invention;

[0025] Figure 6 This is a schematic diagram of the power radiator substrate in the patent of this invention;

[0026] Figure 7 This is a schematic diagram of the radiator substrate of the power amplifier board in the patent of this invention;

[0027] In the figure: 1. Overhead crane housing; 11. Wireless power supply coil mounting hole; 12. Power control board; 2. Overhead crane control box; 21. Control box sealing plate; 22. Power amplifier board radiator; 23. Power amplifier board; 24. Power supply radiator; 25. Main control board; 26. Battery; 221. Power amplifier board radiator threaded hole; 231. Power module; 232. Power module pressing hole; 241. Radiator fin; 242. Wire access hole. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with 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 making creative efforts are within the scope of protection of the present invention.

[0029] A control box inside an overhead crane with heat dissipation and dustproof performance, such as Figure 1 As shown; the crane shell is provided with a wireless power supply coil mounting hole and a power control board, as shown Figure 2 As shown; the power control board performs full-wave rectification and wireless charging voltage stabilization on the current obtained by the electromagnetic resonance wireless power supply coil, and transmits it to the battery storage through the wire access hole; the radial shell of the overhead crane control box is composed of the inner hollow surface of the overhead crane shell, which is made of 6061-T6 aluminum alloy and the surface is anodized to form a hole-free sealed interface; the control box integrates a multi-layer structure, including a control box sealing plate, an amplifier board radiator, an amplifier board, a power radiator, a main control board and a battery, and the various components are arranged in layers to achieve a reasonable equipment layout.

[0030] The power amplifier board in the crane control box is equipped with a power module that carries the main heating components of the crane control box, such as Figure 3 As shown in the figure, the power module is fixed to the back side of the power amplifier board through the reflow soldering process; the heat dissipation surface of the power module is coated with Kraft K-5211 thermal grease (thickness 1.0mm, thermal conductivity 3.5W / mK) to improve thermal conductivity; at the same time, the power module pressing hole and the power amplifier board heat sink threaded hole are connected by a torque wrench (preset value 2.5N·m) with an internal hexagonal M3 stud, as shown in the figure. Figure 4 As shown, a thermal conductive interface with a contact pressure ≥ 0.8 MPa is formed, which greatly improves the thermal conductivity.

[0031] The outer contour of the power amplifier board heat sink is adapted to the internal upper hollow structure of the overhead crane shell, forming a three-dimensional configuration of isosceles trapezoidal cross section, and forming an interference fit with the shell and the power module surface with a gap of 0.1-0.3mm (matching surface roughness Ra≤1.6μm); the heat sink fin adopts a single-side wavy design, such as Figure 5 As shown, the crest axis is arranged horizontally with the direction of travel of the overhead crane, which not only improves the rigidity of thin-walled parts but also increases the heat dissipation area; the power amplifier board radiator base plate is reserved with M3 threaded holes, such as Figure 7 As shown, the holes are arranged in a staggered manner according to the specific positions of the power amplifier modules; the power amplifier board radiator material is made of carbon fiber reinforced aluminum-based composite material, which ensures lightweight and anti-magnetic properties.

[0032] The outer contour of the power radiator is adapted to the hollow structure on both sides of the inner part of the overhead crane shell, forming a three-dimensional configuration with a right-angled trapezoidal cross-section, and forming an interference fit with the shell and the battery surface (clearance ≤ 0.5mm). This fit mode realizes a tight connection without bolts through elastic deformation, reduces thermal resistance, and improves heat dissipation efficiency; the radiator fin adopts a single-sided wavy design, and its continuous undulating structure can enhance the airflow disturbance effect, and improves the heat dissipation efficiency by 30% compared with traditional straight fins; the power radiator substrate plane is provided with an array of wire access holes, such as Figure 6 As shown, the hole chamfer is 0.3×45°, and the chamfering treatment effectively eliminates the hidden dangers of burrs and ensures that the insulation layer of the wire is not damaged during connection; the power radiator material is made of carbon fiber reinforced aluminum matrix composite material, which has both high thermal conductivity of 220W / m·K and high thermal conductivity of 1.8g / cm 3 Lightweight characteristics.

[0033] The control box sealing plate is made of 1.0mm-2.0mm annealed copper sheet to ensure its lightweight and anti-magnetic properties; a torque wrench is used to fix the M4 fine-thread connection on both radial sides of the overhead crane shell to ensure uniform distribution of pre-tightening force; and polyurethane sealant is used to seal the seams.

[0034] The power amplifier board, main control board and battery are densely layered using copper columns and copper-aluminum composite heat dissipation substrates to improve the space utilization of the control box; the main control board is divided into a low heat generation area and placed in the central part of the control box, and the battery and power amplifier board are divided into a high heat generation area and placed on the radiator side, so that the heat zones are reasonably distributed and the heat dissipation of the control box is improved.

[0035] The working principle of the present invention is: the built-in electromagnetic resonance coil in the track transmits electrical energy, the control box receives energy through the wireless power supply coil, and the energy is transmitted to the battery for storage after rectification and voltage stabilization by the internal power control board. After the overhead crane is started, the battery supplies power to the core components such as the power amplifier board and the main control board. The fully enclosed aluminum alloy box adopts a hole-free design, combined with a copper sealing plate and a sealing glue process to effectively isolate the intrusion of external dust. When the overhead crane runs at a speed of 5-6 meters per second, the natural airflow generated by the movement continuously flows through the wavy fin surface of the power amplifier board radiator, and uses aerodynamic principles to achieve fanless heat dissipation, and the operating temperature of electronic components is controlled within a safe threshold. The entire system ensures the long-term and stable operation of the overhead crane in a dusty environment through the synergistic effect of structural sealing and dynamic heat dissipation.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An overhead travelling crane control box with heat dissipation and dustproof performance, characterized by: The invention comprises a crane housing (1) and a crane control box (2); the crane housing (1) is provided with a wireless power supply coil mounting hole (11) and a power control board (12); the radial shell of the crane control box (2) is formed by the inner hollow portion of the crane housing (1), and is composed of a control box sealing plate (21), a power amplifier board radiator (22), a power amplifier board (23), a power supply radiator (24), a main control board (25) and a battery (26).

2. The overhead travelling vehicle interior control box with heat dissipation and dustproof performance according to claim 1, characterized in that: In the overhead crane control box (2), the power amplifier board (23) is provided with a power module (231) for carrying a heating element of the overhead crane control box (2), and the power module (231) is fixed to the back side of the power amplifier board (23) by a welding process; a heat dissipation surface of the power module (231) is first coated with a layer of thermal conductive silicone grease of one millimeter thin, and is bolted to the threaded hole (221) of the power amplifier board radiator through the power module pressing hole (232) to form a heat conductive contact interface.

3. The overhead travelling vehicle interior control box with heat dissipation and dustproof performance according to claim 1, characterized in that: The power amplifier board radiator (22) has an outer contour adapted to the internal hollow structure of the overhead traveling vehicle housing (1), presenting a three-dimensional configuration with an isosceles trapezoidal cross section and tightly fitting with the overhead traveling vehicle housing (1) and the surface of the power module (231); the radiator fins (241) are provided with a single-sided wavy curved surface; a power amplifier board radiator threaded hole (221) is reserved on the substrate of the power amplifier board radiator (22), and the power amplifier board radiator (22) is made of a carbon fiber reinforced aluminum-based composite material.

4. The overhead travelling vehicle interior control box with heat dissipation and dustproof performance according to claim 1, characterized in that: The power radiator (24) has an outer contour adapted to the internal hollow structure of the overhead traveling vehicle housing (1), presenting a three-dimensional configuration with a right-angled trapezoidal cross section, and is tightly fitted to the overhead traveling vehicle housing (1) and the surface of the battery (26); the radiator fins (241) are provided with a single-sided wavy surface; an array of wire access holes (242) is provided on the plane of the substrate of the power radiator (24), and the material of the power radiator (24) is selected from carbon fiber reinforced aluminum-based composite materials.

5. The overhead travelling vehicle interior control box with heat dissipation and dustproof performance according to claim 1, characterized in that: The control box sealing plate (21) is a 1.0mm to 2.0mm copper thin plate component, fixed to both radial sides of the overhead travelling vehicle housing (1) through threaded connection, and sealed using a sealing adhesive bonding process.

6. The overhead travelling vehicle interior control box with heat dissipation and dustproof performance according to claim 1, characterized in that: The power amplifier board (23), main control board (25), and battery (26) are all closely arranged in layers and placed in different areas according to the heat generation.

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