A steel plate structure servo, permanent magnet, three-phase asynchronous motor

Abstract

The utility model discloses a kind of steel plate structure servo, permanent magnet, three-phase asynchronous motor, including motor base, front end cover, rear end cover, stator, rotor and heat dissipation fan blade, motor base includes steel plate cylinder, the outer wall of steel plate cylinder is connected with several groups of aluminum heat sink one and aluminum heat sink two arranged along the circumferential direction by heat-conducting adhesive, the outside of aluminum heat sink one is equipped with outer baffle and forms heat dissipation passage one, the outside of aluminum heat sink two is equipped with angle baffle and forms heat dissipation passage two;Front end cover and rear end cover are fixedly connected to the front and rear ends of steel plate cylinder respectively;Stator is coaxially fixed to the inside of steel plate cylinder;Roter is rotatably connected between front end cover and rear end cover;Heat dissipation fan blade is coaxially connected to the end of rotor, heat dissipation fan blade is used to produce forced air flow when motor operates, cooling air is transported to heat dissipation passage one and heat dissipation passage two, to enhance convective heat dissipation effect.The motor of this structure has good heat dissipation, high mechanical strength and lightweight advantage.

Description

Technical Field

[0001] This utility model relates to the technical field of electric motors, specifically to a steel plate structure servo, permanent magnet, three-phase asynchronous motor. Background Technology

[0002] With the rapid development of industrial automation, intelligent manufacturing, and new energy technologies, servo motors, permanent magnet synchronous motors, and three-phase asynchronous motors, as core power devices, are widely used in CNC machine tools, robots, rail transportation, wind power equipment, and other fields. Under high power density and long-term continuous operation conditions, a large amount of heat is generated inside the motor due to copper and iron losses. If heat cannot be dissipated effectively in time, it will lead to excessive winding temperature rise, 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.

[0006] Therefore, there is an urgent need for a new type of motor frame structure that is lightweight, has efficient heat dissipation, high strength, low cost, and is easy to maintain, in order to improve the overall performance and engineering applicability of the motor. Utility Model Content

[0007] The purpose of this invention is to provide a steel plate structure servo permanent magnet three-phase asynchronous motor to solve the above-mentioned defects caused by the prior art.

[0008] A steel plate structure servo, permanent magnet, three-phase asynchronous motor includes a motor frame, a front cover, a rear cover, a stator, a rotor, and cooling fan blades. The motor base includes a steel plate cylinder. Several groups of aluminum heat sinks are bonded to the outer wall of the steel plate cylinder by thermally conductive adhesive. Each group of aluminum heat sinks is provided with an outer protective plate. The aluminum heat sinks and the outer protective plate together form a heat dissipation channel for air cooling. Aluminum heat sinks are bonded to the steel plate cylinder between two adjacent groups of aluminum heat sinks by thermally conductive adhesive. Each aluminum heat sink is provided with a corner guard. The aluminum heat sinks and the corner guard together form a heat dissipation channel for air cooling. The front end cover and the rear end cover are respectively fixedly connected to the front and rear ends of the steel plate cylinder. The edge of the steel plate cylinder is provided with several ventilation grooves that are connected to the heat dissipation channel one, and ventilation holes that are connected to the heat dissipation channel two are provided between two adjacent ventilation grooves. 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 blades are coaxially connected to the end of the rotor. The cooling fan blades are used to generate forced airflow when the motor is running, and deliver cooling air to the first and second cooling channels to enhance the convective cooling effect.

[0009] Preferably, a number of steel plate ribs are evenly distributed along the circumference on the outer wall of the steel plate cylinder, and a number of buckles are fixedly connected to both sides of the steel plate ribs. Each set of aluminum heat dissipation plates is fixed to the steel plate ribs by buckles, and the aluminum heat dissipation plates are connected to each other by a number of elastic buckles.

[0010] Preferably, the steel plate cylinder has a pair of steel reinforcing plates arranged parallel to each other on both sides of each group of aluminum heat sinks. The steel reinforcing plates have a connecting groove on the side near the steel plate cylinder. The outer protective plate is fixedly connected between the pair of parallel steel reinforcing plates. The corner protective plate is fixedly connected between a pair of adjacent steel reinforcing plates. The front end cover and the rear end cover are respectively screwed to the front and rear ends of all the steel reinforcing plates.

[0011] Preferably, a protective cover is fixedly connected to the outer side of the rear end cover.

[0012] Preferably, a motor junction box is fixedly installed on the top of the upper outer protective plate.

[0013] Preferably, a lifting ring seat is fixedly connected between two adjacent steel reinforcing plates, and a lifting ring is threaded onto the lifting ring seat.

[0014] Preferably, a base plate is screwed to the lower side of the two steel reinforcing plates below, and a reinforcing rib is fixedly connected between the base plate on the same side and the two adjacent steel reinforcing plates.

[0015] 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 aluminum heat sink through thermally conductive adhesive. It is designed with dual-type heat dissipation channels and combined with forced ventilation by the cooling fan blades, which significantly improves the convective heat transfer efficiency and effectively reduces the temperature rise of the motor during operation.

[0016] 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 ribs and reinforcing ribs further improves the overall structural stability, making it suitable for harsh working conditions such as high vibration and heavy load.

[0017] 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.

[0018] 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.

[0019] 5. Strong process adaptability: The aluminum heat sink is fixed by clips and elastic 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.

[0020] In summary, this utility model provides a novel motor structure that integrates lightweight, high strength, efficient heat dissipation, low cost, and high reliability, making it particularly suitable for modern industrial motor applications that have dual requirements for performance and cost. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall assembly of this utility model.

[0022] Figure 2 This is a schematic diagram of the overall explosion structure of this utility model.

[0023] Figure 3This is a three-dimensional structural diagram of the motor base.

[0024] Figure 4 This is a schematic diagram of the overall structure of the motor base, viewed from the front.

[0025] Figure 5 This is a schematic diagram of the overall frame structure of the motor base.

[0026] Figure 6 This is a schematic diagram of the assembly of aluminum heat sink one and aluminum heat sink two.

[0027] Figure 7 This is a schematic diagram of the elastic clip that connects two aluminum heat sink plates.

[0028] Figure 8 This is a three-dimensional structural diagram of the rear cover.

[0029] Figure 9 A schematic diagram of the overall assembly of another similar electric motor.

[0030] Figure 10 for Figure 9 A schematic diagram of the overall front view of the motor frame of the electric motor.

[0031] Figure 11 for Figure 9 A schematic diagram of the overall frame structure of the motor base of the electric motor.

[0032] in: 10-Motor base; 101-Steel plate cylinder; 102-Steel plate reinforcing strip; 103-Steel reinforcing plate; 103a-Connecting groove; 104-Aluminum heat sink plate one; 105-Snap fastener; 106-Aluminum heat sink plate two; 107-Snap fastener clip; 108-Outer protective plate; 109-Corner guard plate; 110-Motor junction box; 111-Lifting eye seat; 112-Lifting eye; 113-Base plate; 114-Reinforcing rib; 20-Front end cap; 30 - Rear end cap; 30a - Vent groove; 30b - Vent hole; 40-Stator; 50-rotor; 60- Cooling fan blades; 70 - Heat sink. Detailed Implementation

[0033] 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.

[0034] like Figures 1 to 8As shown, a steel plate structure servo, permanent magnet, three-phase asynchronous motor includes a motor frame 10, a front cover 20, a rear cover 30, a stator 40, a rotor 50, and cooling fan blades 60. The motor base 10 includes a steel plate cylinder 101. Several sets of aluminum heat sinks 104 arranged circumferentially are bonded to the outer wall of the steel plate cylinder 101 by thermally conductive adhesive. Each set of aluminum heat sinks 104 is provided with an outer protective plate 108. The aluminum heat sinks 104 and the outer protective plate 108 together form a heat dissipation channel 1 for air cooling. Aluminum heat sinks 106 are bonded between two adjacent sets of aluminum heat sinks 104 by thermally conductive adhesive. Each aluminum heat sink 106 is provided with a corner guard 109 on its outer side. The aluminum heat sinks 106 and the corner guard 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 edge of the steel plate cylinder 101 is provided with a number of ventilation grooves 30a that are connected to the heat dissipation channel one, and ventilation holes 30b that are connected to the heat dissipation channel two are provided between two adjacent ventilation grooves 30a. 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 blade 60 is coaxially connected to the end of the rotor 50. The cooling fan blade 24 is used to generate forced airflow when the motor is running, and deliver cooling air to the first and second cooling channels to enhance the convective cooling effect.

[0035] In this embodiment, a plurality of steel plate ribs 102 are evenly distributed circumferentially on the outer wall of the steel plate cylinder 101. A plurality of clips 105 are fixedly connected to both sides of each steel plate rib 102. Each set of aluminum heat sink 104 is secured to the steel plate rib 102 by the clips 105. The aluminum heat sink 104 and the aluminum heat sink 106 are connected by a plurality of elastic clips 107. These steel plate ribs 102 can improve the structural strength of the motor base 10, forming an integral load-bearing structure. The clips 105 and clips 107 tightly hold the aluminum heat sink 104 and the aluminum heat sink 106 to the outer wall of the steel plate cylinder 101.

[0036] In this embodiment, the steel plate cylinder 101 has a pair of parallel steel reinforcing plates 103 arranged on both sides of each group of aluminum heat sink plates 104. Each steel reinforcing plate 103 has a connecting groove 103a on the side closest to the steel plate cylinder 101. The outer protective plate 108 is fixedly connected between the pair of parallel steel reinforcing plates 103, and the corner protective plate 109 is fixedly connected between a pair of adjacent steel reinforcing plates 103. The front end cover 20 and the rear end cover 30 are respectively screwed to the front and rear ends of all the steel reinforcing plates 103. These steel reinforcing plates 103 can improve the structural strength of the motor base 10, forming an integral load-bearing structure.

[0037] In this embodiment, a protective cover 70 is fixedly connected to the outer side of the rear end cover 30. This is used to protect the heat dissipation fan blades 60 and the rear connecting components, preventing the entry of external foreign objects.

[0038] In this embodiment, a motor junction box 110 is fixedly installed on the top of the upper outer protective plate 108. It is used to connect three-phase power supply and control signal lines, facilitating wiring and maintenance.

[0039] In this embodiment, a lifting ring seat 111 is fixedly connected between two adjacent steel reinforcing plates 103, and a lifting ring 112 is threaded onto the lifting ring seat 111. This is used for the overall lifting and transportation of the motor.

[0040] In this embodiment, a base plate 113 is screwed to the lower side of the two lower steel stiffening plates 103, and a reinforcing rib 114 is fixedly connected between the base plate 113 on the same side and the two adjacent steel stiffening plates 103. This is for the safe and reliable installation of the motor.

[0041] The working principle of a steel plate structure servo, permanent magnet, three-phase asynchronous motor: When the motor is running, the rotor 50 rotates under the action of electromagnetic torque, driving the cooling fan blades 60 installed at its end to rotate synchronously. When the cooling fan blades 60 rotate, they generate negative pressure, drawing in external cooling air from the rear end of the motor to form a forced ventilation airflow.

[0042] Cooling air first flows through the evenly distributed ventilation slots 30a and ventilation holes 30b along the edge of the rear cover 30, into the first heat dissipation channel formed by the aluminum heat sink 104 and the outer protective plate 108, and the second heat dissipation channel formed by the aluminum heat sink 106 and the 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.

[0043] During this process, the cooling air comes into full contact with the aluminum heat sink 104 and the aluminum heat sink 106, which are tightly bonded to the heated steel cylinder 101 via 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.

[0044] 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. It also boasts advantages such as high structural strength, convenient installation and maintenance, and reliable operation, making it particularly suitable for servo, permanent magnet, and three-phase asynchronous motor applications under high power density and continuous operation conditions.

[0045] 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. A steel plate structure servo, permanent magnet, three-phase asynchronous motor, comprising a motor frame (10), a front end cover (20), a rear end cover (30), a stator (40), a rotor (50), and cooling fan blades (60), characterized in that: The motor base (10) includes a steel plate cylinder (101). Several sets of aluminum heat sinks (104) arranged circumferentially are bonded to the outer wall of the steel plate cylinder (101) by thermally conductive adhesive. Each set of aluminum heat sinks (104) is provided with an outer protective plate (108). The aluminum heat sinks (104) and the outer protective plate (108) together form a heat dissipation channel for air cooling. The steel plate cylinder (101) is bonded with aluminum heat sinks (106) between two adjacent sets of aluminum heat sinks (104) by thermally conductive adhesive. Each aluminum heat sink (106) is provided with a corner guard (109) on its outer side. The aluminum heat sinks (106) and the corner guard (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 edge of the steel plate cylinder (101) is provided with a number of ventilation grooves (30a) that are connected to the heat dissipation channel one, and ventilation holes (30b) that are connected to the heat dissipation channel two are provided between two adjacent ventilation grooves (30a). 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 blades (60) are coaxially connected to the end of the rotor (50). The cooling fan blades (60) are used to generate forced airflow when the motor is running, and deliver cooling air to the first and second cooling channels to enhance the convective heat dissipation effect.

2. The steel plate structure servo, permanent magnet, three-phase asynchronous 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. Several buckles (105) are fixedly connected to both sides of the steel plate ribs (102). Each group of aluminum heat sinks (104) is fixed to the steel plate ribs (102) by buckles (105). The aluminum heat sinks (104) and the aluminum heat sinks (106) are connected by several elastic buckles (107).

3. A steel plate structure servo, permanent magnet, three-phase asynchronous motor according to claim 2, characterized in that, The steel plate cylinder (101) has a pair of steel reinforcing plates (103) arranged parallel to each other on both sides of each group of aluminum heat sinks (104). The steel reinforcing plates (103) have a connecting groove (103a) on the side near the steel plate cylinder (101). The outer protective plate (108) is fixedly connected between the pair of parallel steel reinforcing plates (103). The corner protective plate (109) is fixedly connected between a pair of adjacent steel reinforcing plates (103). The front end cover (20) and the rear end cover (30) are respectively screwed to the front and rear ends of all the steel reinforcing plates (103).

4. A steel plate structure servo, permanent magnet, three-phase asynchronous motor according to claim 1, characterized in that, A protective cover (70) is fixedly connected to the outside of the rear end cover (30).

5. A steel plate structure servo, permanent magnet, three-phase asynchronous motor according to claim 1, characterized in that, A motor junction box (110) is fixedly installed on the top of the upper outer protective plate (108).

6. A steel plate structure servo, permanent magnet, three-phase asynchronous motor according to claim 4, characterized in that, A lifting ring seat (111) is fixedly connected between two adjacent steel reinforcing plates (103), and a lifting ring (112) is threaded onto the lifting ring seat (111).

7. A steel plate structure servo, permanent magnet, three-phase asynchronous motor according to claim 4, characterized in that, A base plate (113) is screwed to the lower side of the two steel stiffening plates (103), and a reinforcing rib (114) is fixedly connected between the base plate (113) on the same side and the two adjacent steel stiffening plates (103).

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