沈阳市劳动人事争议仲裁机构新设法援工作站

The motor shaft is a core component in various rotating machinery that enables energy conversion and power transmission, and the performance of the motor shaft directly affects the operating efficiency, stability, and service life of the equipment. As a key hub connecting the motor and driven components, the motor shaft not only undertakes the core mission of converting electrical energy into mechanical energy but also needs to maintain the dynamic balance between the rotor and the transmission system during high-speed operation (with rotational speeds exceeding 20,000 rpm in some scenarios). It is indeed the "power core" that ensures the efficient operation of the entire equipment.  

The value of the motor shaft is reflected in multiple key roles:  

First, as a "bridge" for power transmission, the motor shaft accurately transmits the torque generated by the motor to executive components such as gears and pulleys, realizing the efficient conversion of electrical energy to mechanical motion. The transmission efficiency of the motor shaft directly affects the energy consumption level of the system;  

Second, as a "framework" for structural support, the motor shaft provides rigid fixation for core components such as rotor laminations and bearings, ensuring that rotating parts maintain concentricity during high-speed operation and avoiding vibration and noise caused by imbalance;  

Third, as a "benchmark" for system coordination, the alignment accuracy of the motor shaft's axis is crucial for reducing component wear—angular deviation will cause additional loads on bearings, parallel offset will intensify coupling stress, and composite misalignment is even a common cause of premature equipment failure.  

The material selection for the motor shaft needs to find a precise balance between strength, toughness, weather resistance, and cost, with different materials corresponding to different application scenarios:  

- Carbon steel, represented by SAE 1045, with moderate tensile strength (up to 700MPa) and good toughness, has become the first choice for general-purpose motor shaft applications. Its excellent machinability can meet the manufacturing needs of complex geometric structures, and the difference between hot-rolled and cold-rolled processes can also flexibly adapt to cost and precision requirements;  

- Stainless steel (such as type 316) forms a self-repairing oxide layer through the alloy ratio of elements like chromium and molybdenum, demonstrating excellent corrosion resistance in highly corrosive environments such as salt spray and chemical industries. It can also maintain stable performance within a wide temperature range of -200°C to 870°C, making it an ideal choice for motor shafts in extreme environments;  

- Alloy steel (such as 4140) enhances performance by adding elements like chromium and molybdenum, with tensile strength reaching 930-1080MPa. Combined with heat treatment processes such as quenching and tempering, the surface hardness of the motor shaft can be increased to HRC 58-62, specially designed for heavy-duty industrial scenarios with high torque and high cyclic stress.  

In addition, heat treatment technology is a key means to improve the performance of the motor shaft: induction hardening can form a 2-6mm hardened layer on the surface of the motor shaft, balancing surface wear resistance and core toughness; nitriding process, through the diffusion of nitrogen atoms at low temperatures, improves fatigue strength without changing the overall size, providing longer service life guarantee for precision motor shafts.  

In terms of structural design, hollow motor shafts are widely used in large motors—not only reducing inertial load through weight reduction but also integrating cooling systems through their internal channels to solve the heat dissipation problem during high-speed operation; solid motor shafts, on the other hand, adapt to the compact needs of small and medium-power equipment with higher rigidity.  

In terms of maintenance, the focus should be on fault prevention: using laser alignment tools to ensure precise alignment of the motor shaft system, reducing component loss caused by deviations; regularly inspecting and using high-quality lubricants to reduce friction and wear; adopting coating protection or corrosion-resistant materials for the motor shaft in corrosive environments; avoiding vibration and component damage caused by imbalance through dynamic balancing technology. These measures can effectively avoid problems such as misalignment, wear, and fatigue fracture of the motor shaft, significantly extending the service life of the equipment.  

As an enterprise specializing in the research, development, and production of motor shafts, Sinomore deeply understands the personalized needs of motor shafts in different scenarios. We can customize a full range of motor shaft products from carbon steel to special alloys according to customers' load parameters, environmental characteristics, and structural requirements, covering diverse needs such as solid/hollow structures and surface hardening treatments. Whether for general industrial scenarios or extreme environment applications, we can provide reliable motor shaft solutions with precise material adaptation and precision manufacturing. We look forward to cooperating with partners from all walks of life to create efficient and stable equipment operation value together.

Tags: Motor Shaft, hollow shaft motor, 775 dc motor dual shaft