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The end motor cover of the train traction motor is used to close the motor and support the rotor. A cooling air inlet is provided on the upper part of the end cover of the non-transmission end, and a plurality of large holes are provided on the end cover of the transmission end as an air outlet. The rotor core is made up of silicon steel sheets with good magnetic conductivity, and there are 46 grooves in the outer circumference. There are ventilation holes on the core to dissipate heat and reduce mass. Both ends of the rotor core are equipped with pressure rings. The traction motor is mechanically fixed together through the threaded holes on the front and rear end covers and the bracket with the lifting spring. Profiles connect the spring brackets to form a rectangular lifting structure. When the motor is installed, the overall tilt to the driving end is 1.5°. The mechanical connection of the motor to the vehicle is achieved by means of a bracket with elastic suspension. Motion is transmitted to the wheel sets of the train via an appropriate cardan shaft and gearbox. The traction motor is mechanically connected to the cardan shaft by a safety device that protects the cardan shaft and gearbox from over-torque in the event of a short circuit between the two-phase coils of the traction motor. In the efficient operation of the traction motor, the end cover is a key support component, and its performance is directly related to the reliability of the motor, life and environmental adaptability.

As a simple protective motor cover, but in fact it takes multiple missions:
structural support, as the connection of shell and rotor hub motor end cover, needs to carry the rotor high-speed rotation of the centrifugal force and vibration load;
Centro di gestione termica: by optimizing the heat dissipation design, build end cover from the internal winding to the path of thermal conductivity of the external environment;
Sealing barrier: in complex condition, such as rail, electric cars, the end cover can resist the invasion of the moisture, dust and chemical corrosive medium; Electromagnetic compatibility interfaces: end cover part of the design should be integrated electromagnetic shielding layer, suppress the high-frequency harmonic disturbance to the surrounding equipment.
Mechanical properties of the fatigue strength: to satisfy the 10 ^ 7 times zero flaw under circulating load requirements (refer to the IEC 60034 standard); Dynamic deformation control: under the rated speed, the end cover flange surface axial pulse quantity usually 0.05 mm or less; Impact toughness: – 40 ℃ low-temperature impact energy (KV2) or greater 27 j (for frigid application scenario).
The thermal efficiency of heat transfer: aluminum alloy plate thermal conductivity should be 150 con/(mK) o superiore, with forced air cooling when the temperature control is within 55 K; Thermal expansion coefficients of thermal expansion match: motor cover and frame difference to 1.5 * 10 ^ – 6 / ℃ or less and avoid the structure stress of high-temperature conditions.
The environmental adaptability of salt fog resistance: coastal environment application by 480 h neutral salt spray test (ISO 9227); Seal level: IP67 protection standards can withstand under 1 m water depth soak 30 minuti; Fretting wear resistance: the bearing chamber surface after nitriding treatment, microhardness to achieve HV650 above. Grade three, motor cover hardcore process control parameters of ductile cast iron QT500-7: graphite spheroidization rate is 90% o superiore, pearlite content control in 30-50%; Low-pressure casting process: vacuum degree of the cavity 5 kph or less, to ensure that key parts without shrinkage cavity defects; Aging treatment: 300 ℃ x 6 h to stress annealing, 50 mph or less residual stress. Dynamic stiffness matching parameters of the bearing chamber: the radial stiffness of 5 x 10 ^ 8 or higher n/m, the axial rigidity of 3 x 10 ^ 8 n/m or higher; Modal frequency to avoid: first-order natural frequency to avoid the wheel-rail excitation frequencies (120-180 hz); Thermal deformation compensation: design expansion gap 0.15 0.3 mm (thermal gradient calculation according to the line).
Service monitoring data of the vibration intensity: the use of bearing vibration velocity RMS 2.8 mm/s or less (ISO 10816-3); Temperature threshold: winding end temperature alarm value set to 105 k corresponding insulation class (200); Seal life: fluorine rubber seal replacement cycle 800000 km or more (the equivalent of three-phase).
| Material process control | Ferro duttile QT500-7 | graphite spheroidization rate ≥90%, pearlite content control at 30-50% |
| Low pressure casting process | cavity vacuum ≤5kPa, to ensure that there is no shrinkage hole defect in key parts | |
| Aging treatment | 300℃×6h stress relief annealing, residual stress ≤50MPa | |
| Mechanical performance | Resistenza alla fatica | to meet the requirements of zero cracks under 10^7 cycle loads (refer to IEC 60034 standard) |
| Dynamic deformation control | under the rated speed, the axial runout of the end cover flange surface is usually ≤0.05mm | |
| Impact toughness | -40℃ Low temperature impact work (KV2) ≥27J (for cold zone application scenarios) |
Polisacco+scatola di cartone+caso/pallet di legno, secondo la richiesta del cliente

Profilo Aziendale
Luoyang Fonyo Heavy Industries Co., Ltd. è stata fondata nel 1998, copre un'area di 72.600㎡, con più di 300 dipendenti, 32 tecnici, compreso 5 ingegneri senior, 11 ingegneri assistenti, E 16 tecnici. È stato classificato come Centro tecnologico di ingegneria di Luoyang, Luoyang Tecnologia R&Centro D, e impresa alta tecnologia nazionale per molte volte.
La nostra capacità produttiva è 30,000 tonnellate all'anno. Attualmente, produciamo principalmente acciaio fuso, ghisa (ferro grigio, ferro duttile, ecc.), lavorazione del prodotto finito e assemblaggio di componenti. I prodotti sono stati esportati in Russia, gli Stati Uniti, Germania, Argentina, Giappone, Francia, Sudafrica,Italia e altri paesi.
Domande frequenti
Q1: Sei un produttore o una società commerciale?
UN:Siamo un produttore. La nostra azienda è stata fondata nel 1998, con quasi 30 anni nel settore della fusione, una superficie totale di 72.600㎡, con un'area edificabile di 51.000㎡.
Q2. Quali sono i vostri prodotti principali??
UN: Ci concentriamo principalmente sulla fusione di acciaio, fusione di ferro, lavorazione del prodotto finito, e produzione di assemblaggi di componenti.
Q3: Con quanta precisione puoi produrre parti di fusione?
UN: Abbiamo la capacità di produrre parti di fusione con diversi processi di fusione. La produzione è rigorosamente conforme alla norma ISO 9001, ISO 14001 e ISO45001,EN15085, IRIS.
Q4. Puoi produrre secondo i campioni?
SÌ, possiamo produrre dai vostri campioni o disegni tecnici. Possiamo costruire disegni per te anche dopo aver ricevuto i tuoi campioni.
Q5: Come si effettua il controllo qualità prima della consegna??
UN: Il controllo di qualità è un fattore molto importante per garantire la qualità delle parti in fusione di acciaio. Seguiamo 3 tempi di ispezione durante l’intero processo produttivo. E forniremo un rapporto sui test dei materiali, rapporto di collaudo dimensionale, e rapporto sui test delle proprietà meccaniche ai nostri clienti prima della consegna.
Se sei interessato a qualche prodotto, non esitate a contattarci.
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