Air-cooled heat-dissipating steel plate structure motor

Abstract

The utility model discloses a kind of air-cooled heat-dissipating steel plate structure motor, including motor base, front end cover, rear end cover, stator, rotor, heat-dissipating fan and protective cover, motor base includes steel plate cylinder, the outer wall of steel plate cylinder is pasted and touches several groups arc heat-dissipating plate one and arc heat-dissipating plate two, the outside of arc heat-dissipating plate one is equipped with arc outer baffle and forms heat-dissipating passage one, the outside of arc heat-dissipating plate is equipped with arc angle baffle and forms heat-dissipating passage two;Front end cover and rear end cover are connected to the front and rear ends of steel plate cylinder respectively, and air gap is provided between rear end cover and protective cover;Stator is coaxially fixed to the inside of steel plate cylinder;Rotor is rotatably connected between front end cover and rear end cover;Heat-dissipating fan is coaxially connected to the end of rotor, and heat-dissipating fan blade is used to generate forced air flow when motor operates, and cooling air is transported to heat-dissipating passage one and two, to enhance convective heat-dissipating effect.The motor in the application has good heat dissipation, high mechanical strength and lightweight advantages.

Description

Technical Field

[0001] This utility model relates to the technical field of electric motors, and specifically to an air-cooled steel plate structure electric motor. Background Technology

[0002] Under high power density and long-term continuous operation conditions, a large amount of heat is generated inside the motor due to copper loss and iron loss. If the heat cannot be dissipated in a timely and effective manner, it will lead to excessive temperature rise of the windings, accelerated insulation aging, decreased magnetic performance, and even equipment failure, seriously affecting the efficiency, reliability and service life of the motor.

[0003] Currently, most small and medium-sized motors use air cooling, whose heat dissipation capacity mainly relies on the heat sink fins on the frame surface and external forced ventilation. However, traditional motor frames are generally made of cast iron or aluminum alloy, which has many technical drawbacks: 1. Cast iron base: It is heavy and bulky, and the manufacturing process is energy-intensive and polluting, which does not conform to the development trend of green manufacturing. Castings are prone to internal defects such as loose structure, porosity, and slag inclusions. Moreover, they are prone to cracking due to thermal stress concentration in low-temperature environments, which affects structural safety and service life.

[0004] 2. Aluminum alloy base: (1) High cost: Aluminum alloy is a non-ferrous metal, and the raw materials are expensive; (2) Insufficient mechanical properties: For example, the tensile strength and stiffness of 6063 aluminum alloy are significantly lower than those of ordinary structural steel, and it has a tendency to creep, making it difficult to meet the structural stability requirements under high precision, high vibration or heavy load conditions; (3) Poor corrosion resistance: The surface oxide layer is easily damaged, and the heat dissipation fins are easily bumped and deformed during transportation and use; (4) Limitations in heat dissipation design: If there is a ventilation channel structure, more materials are used, the weight is large, and the cost is high; if there is no ventilation channel structure, the heat dissipation efficiency is low.

[0005] In addition, traditional air-cooled structures generally suffer from problems such as unreasonable heat dissipation channel design, chaotic airflow organization, and local overheating, resulting in low overall heat dissipation efficiency. Utility Model Content

[0006] The purpose of this invention is to provide an air-cooled steel plate structure electric motor to solve the above-mentioned defects caused by the prior art.

[0007] An air-cooled steel plate structure electric motor includes a motor frame, a front cover, a rear cover, a stator, a rotor, a cooling fan, and a protective cover. The motor base includes a steel plate cylinder. Several sets of arc-shaped heat dissipation plates are bonded to the outer wall of the steel plate cylinder by thermally conductive adhesive. Each set of arc-shaped heat dissipation plates is provided with an arc-shaped outer protective plate on its outer side. The arc-shaped heat dissipation plates and the arc-shaped outer protective plates together form a heat dissipation channel for air cooling. Between two adjacent sets of arc-shaped heat dissipation plates, a set of arc-shaped heat dissipation plates is bonded to the steel plate cylinder by thermally conductive adhesive. Each set of arc-shaped heat dissipation plates is provided with an arc-shaped corner protective plate on its outer side. The arc-shaped heat dissipation plates and the arc-shaped corner protective plates together form a heat dissipation channel for air cooling. The front end cover and the rear end cover are fixedly connected to the front and rear ends of the steel plate cylinder, respectively. The protective cover is coaxially connected to the outside of the rear end cover, and an annular ventilation gap is provided between the protective cover and the rear end cover. The stator is coaxially fixed to the inner side of the steel plate cylinder; The rotor is rotatably connected between the front cover and the rear cover via bearings. The cooling fan is coaxially connected to the end of the rotor. The cooling fan is used to generate forced airflow when the motor is running, and delivers cooling air to the first and second cooling channels through the ventilation gap to enhance the convective cooling effect.

[0008] Preferably, a number of steel plate ribs are evenly distributed along the circumference on the outer wall of the steel plate cylinder. Each set of arc-shaped heat dissipation plates is fixed to both sides of the steel plate ribs by spring clips. The arc-shaped heat dissipation plates are fixed between two adjacent sets of arc-shaped heat dissipation plates by spring clips.

[0009] Preferably, the steel plate cylinder has a pair of steel plate stiffeners arranged parallel to each other on both sides of each set of arc-shaped heat dissipation plates. The steel plate stiffeners have a connecting groove on the side of the steel plate cylinder closest to the steel plate cylinder. The arc-shaped outer protective plate is fixedly connected between the pair of parallel steel plate stiffeners, and the arc-shaped corner protective plate is fixedly connected between a pair of adjacent steel plate stiffeners.

[0010] Preferably, each pair of adjacent steel plate reinforcing plates has a connecting block one and a connecting block two fixedly connected to both ends, the front end cap screw is connected to all connecting blocks one, and the rear end cap screw is connected to all connecting blocks two.

[0011] Preferably, a nameplate holder and a motor junction box are fixedly connected to the top of the upper arc-shaped outer protective plate.

[0012] Preferably, a lifting ring seat is fixedly connected to the middle of the two pairs of steel plate stiffeners above, and a lifting ring is threaded onto the lifting ring seat.

[0013] Preferably, a base plate is screwed to the lower side of the two steel plate stiffeners below, and a reinforcing rib is fixedly connected between the base plate on the same side and the two adjacent steel plate stiffeners.

[0014] Compared with the prior art, the present invention has the following advantages: 1. High-efficiency composite heat dissipation, low temperature rise: The steel-aluminum composite structure is adopted, and the heat of the motor is quickly transferred from the steel plate cylinder to the arc-shaped heat sink through thermally conductive adhesive. It is designed with dual-type heat dissipation channels and combined with the forced ventilation of the cooling fan, which significantly improves the convective heat transfer efficiency and effectively reduces the temperature rise of the motor during operation.

[0015] 2. Lightweight structure with high strength: The main body of the base adopts a welded steel plate structure, which reduces the weight by nearly 50% compared with the traditional cast iron base, while having higher tensile strength, rigidity and impact resistance. The design of steel plate ribs, steel plate stiffeners and reinforcing ribs further improves the overall structural stability, making it suitable for harsh working conditions such as high vibration and heavy load.

[0016] 3. Low manufacturing cost, environmentally friendly and energy-saving: Steel plate structures enable modular, mass, and digital production, with fewer processing steps, less cutting, and lower energy consumption, which aligns with the concept of green manufacturing. Compared to aluminum alloy bases, raw material costs are significantly reduced, resulting in substantial overall economic benefits.

[0017] 4. High reliability and long lifespan: Steel has better resistance to low-temperature cracking than cast iron, avoiding the risk of the base cracking in cold environments; the polymer thermally conductive adhesive is elastic after curing, which can absorb thermal expansion and contraction stress and mechanical vibration, playing a shock-absorbing and buffering role, protecting the heat dissipation fins, and extending service life.

[0018] 5. Strong process adaptability: The arc-shaped heat sink is fixed by spring clips, making it easy to install, replace, and maintain; the overall structure avoids defects such as porosity and shrinkage caused by the casting process, resulting in high quality consistency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly of this utility model.

[0020] Figure 2 This is a schematic diagram of the overall explosion structure of this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the motor base.

[0022] Figure 4 This is a schematic diagram of the overall structure of the motor base, viewed from the front.

[0023] Figure 5 This is a schematic diagram of the overall frame structure of the motor base.

[0024] Figure 6 This is a schematic diagram of the assembly of arc-shaped heat sink one and arc-shaped heat sink two.

[0025] in: 10-Motor base; 101-Steel plate cylinder; 102-Steel plate reinforcing bar; 103-Steel plate reinforcing plate; 103a-Connecting groove; 104-Arc-shaped heat dissipation plate one; 105-Spring clip one; 106-Arc-shaped heat dissipation plate two; 107-Spring clip two; 108-Arc-shaped outer protective plate; 109-Arc-shaped corner protective plate; 110-Connecting block one; 111-Connecting block two; 112-Nameplate holder; 113-Motor junction box; 114-Lifting eye seat; 115-Lifting eye; 116-Base plate; 117-Reinforcing rib; 20-Front end cap; 30- Rear end cover; 40-Stator; 50-rotor; 60-Cooling fan; 70 - Protective shield. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figures 1 to 6 As shown, an air-cooled steel plate structure electric motor includes a motor frame 10, a front end cover 20, a rear end cover 30, a stator 40, a rotor 50, a cooling fan 60, and a protective cover 70. The motor base 10 includes a steel plate cylinder 101. Several sets of arc-shaped heat dissipation plates 104 arranged circumferentially are bonded to the outer wall of the steel plate cylinder 101 by thermally conductive adhesive. Each set of arc-shaped heat dissipation plates 104 is provided with an arc-shaped outer protective plate 108 on its outer side. The arc-shaped heat dissipation plates 104 and the arc-shaped outer protective plate 108 together form a heat dissipation channel 1 for air cooling. A set of arc-shaped heat dissipation plates 106 is bonded to the steel plate cylinder 101 between two adjacent sets of arc-shaped heat dissipation plates 104 by thermally conductive adhesive. Each set of arc-shaped heat dissipation plates 106 is provided with an arc-shaped corner protective plate 109 on its outer side. The arc-shaped heat dissipation plates 106 and the arc-shaped corner protective plate 109 together form a heat dissipation channel 2 for air cooling. The front end cover 20 and the rear end cover 30 are respectively fixedly connected to the front and rear ends of the steel plate cylinder 101. The protective cover 70 is coaxially connected to the outside of the rear end cover 30, and an annular ventilation gap is provided between the protective cover 70 and the rear end cover 30. The stator 40 is coaxially fixed to the inner side of the steel plate cylinder 101; The rotor 50 is rotatably connected between the front end cover 20 and the rear end cover 30 via bearings; The cooling fan 60 is coaxially connected to the end of the rotor 50. The cooling fan 60 is used to generate forced airflow when the motor is running, and delivers cooling air to the first and second heat dissipation channels through the ventilation gap to enhance the convective heat dissipation effect.

[0028] In this embodiment, a plurality of steel plate ribs 102 are evenly distributed circumferentially on the outer wall of the steel plate cylinder 101. Each set of arc-shaped heat dissipation plates 104 is fixed to both sides of the steel plate rib 102 by spring clips 105. The arc-shaped heat dissipation plates 106 are fixed between two adjacent sets of arc-shaped heat dissipation plates 104 by spring clips 107. The arc-shaped heat dissipation plates 104 are continuously pressed against the outer wall of the steel plate cylinder 101 by spring clips 105, and the arc-shaped heat dissipation plates 106 are continuously pressed against the outer wall of the steel plate cylinder 101 by spring clips 107.

[0029] In this embodiment, the steel plate cylinder 101 has a pair of parallel steel plate reinforcing plates 103 arranged on both sides of each set of arc-shaped heat dissipation plates 104. Each steel plate reinforcing plate 103 has a connecting groove 103a on the side closest to the steel plate cylinder 101. The arc-shaped outer protective plate 108 is fixedly connected between the pair of parallel steel plate reinforcing plates 103, and the arc-shaped corner protective plate 109 is fixedly connected between a pair of adjacent steel plate reinforcing plates 103. The arc-shaped heat dissipation plates 104 and 108 together form a heat dissipation channel one for air cooling; the arc-shaped heat dissipation plates 106 and 109 together form a heat dissipation channel two for air cooling.

[0030] In this embodiment, each pair of adjacent steel plate reinforcing ribs 103 is fixedly connected to two ends by connecting block one 110 and connecting block two 111, respectively. The front end cover 20 is screwed to all connecting blocks one 110, and the rear end cover 30 is screwed to all connecting blocks two 111. The front end cover 20 and the rear end cover 30 are screwed to the front and rear ends of the overall frame of the motor base, respectively.

[0031] In this embodiment, a nameplate holder 112 and a motor junction box 110 are fixedly connected to the top of the upper arc-shaped outer protective plate 108. The nameplate holder 112 is used for installing the motor nameplate; the motor junction box 110 is used to connect the three-phase power supply and control signal lines, which facilitates wiring and maintenance.

[0032] In this embodiment, a lifting ring seat 114 is fixedly connected to the middle of the two pairs of steel plate stiffeners 103 above, and a lifting ring 115 is threaded onto the lifting ring seat 114. The lifting ring 115 is used for the overall lifting and transportation of the motor.

[0033] In this embodiment, a base plate 113 is screwed to the lower side of the two lower steel plate stiffeners 103, and a reinforcing rib 114 is fixedly connected between the base plate 113 on the same side and the two adjacent steel plate stiffeners 103. The base plate 113 is used for the safe and reliable installation of the motor.

[0034] The working principle of an air-cooled steel plate structure electric motor: When the motor is running, the rotor 50 rotates under the action of electromagnetic torque, driving the cooling fan 60 installed at its end to rotate synchronously. When the cooling fan 60 rotates, it generates negative pressure, drawing in external cooling air from the rear end of the motor to form a forced ventilation airflow.

[0035] Cooling air first flows through the ventilation gap between the rear cover 30 and the protective cover 70 into the first heat dissipation channel formed by the arc-shaped heat dissipation plate 104 and the arc-shaped outer protective plate 108, and the second heat dissipation channel formed by the arc-shaped heat dissipation plate 106 and the arc-shaped corner protective plate 109. The airflow flows out from the front end along the heat dissipation channels, completing the directional flow from back to front, forming a complete air circulation path.

[0036] During this process, the cooling air comes into full contact with the arc-shaped heat sink 104 and the arc-shaped heat sink 106, while the arc-shaped heat sinks are tightly bonded to the heated steel cylinder 101 through thermally conductive adhesive, efficiently conducting heat generated inside the motor, such as the stator core and windings. Through convective heat transfer, the heat is carried away by the high-speed flowing cooling air, significantly improving the overall heat dissipation efficiency of the motor and effectively reducing the operating temperature rise.

[0037] In summary, this motor achieves excellent heat dissipation performance through its efficient air-cooled structure design, multi-channel forced ventilation, and integrated heat conduction and heat dissipation layout.

[0038] Therefore, the above-disclosed embodiments are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. An air-cooled steel plate structure electric motor, comprising a motor frame (10), a front end cover (20), a rear end cover (30), a stator (40), a rotor (50), a cooling fan (60), and a protective cover (70), characterized in that: The motor base (10) includes a steel plate cylinder (101). Several sets of arc-shaped heat dissipation plates (104) arranged circumferentially are bonded to the outer wall of the steel plate cylinder (101) by thermally conductive adhesive. Each set of arc-shaped heat dissipation plates (104) is provided with an arc-shaped outer guard plate (108) on its outer side. The arc-shaped heat dissipation plates (104) and the arc-shaped outer guard plate (108) together form a heat dissipation channel for air cooling. Between two adjacent sets of arc-shaped heat dissipation plates (104), a set of arc-shaped heat dissipation plates (106) is bonded to the steel plate cylinder (101) by thermally conductive adhesive. Each set of arc-shaped heat dissipation plates (106) is provided with an arc-shaped corner guard plate (109) on its outer side. The arc-shaped heat dissipation plates (106) and the arc-shaped corner guard plate (109) together form a heat dissipation channel for air cooling. The front end cover (20) and the rear end cover (30) are respectively fixedly connected to the front and rear ends of the steel plate cylinder (101). The protective cover (70) is coaxially connected to the outside of the rear end cover (30), and an annular ventilation gap is provided between the protective cover (70) and the rear end cover (30). The stator (40) is coaxially fixed to the inner side of the steel plate cylinder (101); The rotor (50) is rotatably connected between the front end cover (20) and the rear end cover (30) via bearings; The cooling fan (60) is coaxially connected to the end of the rotor (50). The cooling fan (60) is used to generate forced airflow when the motor is running, and delivers cooling air to the first and second heat dissipation channels through the ventilation gap to enhance the convective heat dissipation effect.

2. The air-cooled heat dissipation steel plate structure electric motor according to claim 1, characterized in that, The outer wall of the steel plate cylinder (101) is evenly distributed with several steel plate ribs (102) along the circumference. Each set of arc-shaped heat dissipation plate one (104) is fixed to both sides of the steel plate rib (102) by spring clip one (105). The arc-shaped heat dissipation plate two (106) is fixed between two adjacent sets of arc-shaped heat dissipation plates one (104) by spring clip two (107).

3. The air-cooled heat dissipation steel plate structure electric motor according to claim 1, characterized in that, The steel plate cylinder (101) has a pair of steel plate reinforcing plates (103) arranged parallel to each other on both sides of each set of arc-shaped heat dissipation plates (104). The steel plate reinforcing plates (103) are provided with a connecting groove (103a) on the side of the steel plate cylinder (101). The arc-shaped outer protective plate (108) is fixedly connected between a pair of parallel steel plate reinforcing plates (103). The arc-shaped corner protective plate (109) is fixedly connected between a pair of adjacent steel plate reinforcing plates (103).

4. The air-cooled heat dissipation steel plate structure electric motor according to claim 3, characterized in that, Each pair of adjacent steel plate reinforcing plates (103) is fixedly connected to two ends of connecting block one (110) and connecting block two (111). The front end cover (20) is screwed onto all connecting blocks one (110), and the rear end cover (30) is screwed onto all connecting blocks two (111).

5. The air-cooled heat dissipation steel plate structure electric motor according to claim 1, characterized in that, A nameplate holder (112) and a motor junction box (110) are fixedly connected to the top of the upper arc-shaped outer protective plate (108).

6. The air-cooled heat dissipation steel plate structure electric motor according to claim 3, characterized in that, A lifting ring seat (114) is fixedly connected to the middle of the two pairs of steel plate stiffeners (103) above, and a lifting ring (115) is threaded onto the lifting ring seat (114).

7. The air-cooled heat dissipation steel plate structure electric motor according to claim 3, characterized in that, A base plate (113) is screwed to the lower side of the two steel plate stiffeners (103), and a reinforcing rib (114) is fixedly connected between the base plate (113) on the same side and the two adjacent steel plate stiffeners (103).

Images