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A leading provider of comprehensive solutions in rigid-chain technology
The Evo-Tech stage winch is a professional piece of equipment specially customized for stage environments. Its key distinguishing features are: 1) It employs an innovative nylon drum, offering multiple advantages such as quiet operation, wear resistance, shock absorption, and protection of steel cables; 2) The torque arm connection ensures high coaxiality, resulting in smoother operation; 3) Precise drum machining eliminates the need for anti-derailment rods; 4) The overall design fully takes into account the stringent requirements of closely spaced stage trusses, space optimization, and low noise levels.
The stage environment places special demands on noise control, vibration reduction, and wire-rope protection. Nylon drums do not aim to replace the strength of metal; rather, while meeting the stage’s load requirements, they leverage their self-lubricating properties to reduce wire-rope wear, absorb shock and dampen noise, and offer lightweight advantages that help alleviate structural loads. We have selected high-strength engineering nylon, whose physical and mechanical properties have undergone rigorous testing, fully satisfying the operational demands of stage hoists and delivering comprehensive benefits unmatched by metal drums.
Yes, the shock-absorbing and damping properties of nylon material make Evo-Tech products exceptionally effective in noise control. Compared to conventional steel drum winches, Evo-Tech nylon drum winches can reduce noise levels by 8 to 15 decibels during operation—particularly during startup, braking, and high-speed running phases. The reduction varies depending on the model, load, and operating conditions. This effect is especially significant in stage environments that are sensitive to noise, as it can markedly improve the acoustic environment of the stage.
The specialized nylon material we’ve chosen boasts excellent wear resistance and self-lubricating properties, and its wear on steel wire ropes is significantly lower than that of metal. Under normal operating and maintenance conditions, its service life can rival that of the hoist’s main structural components, typically lasting 8 to 10 years or even longer. The specific service life depends on factors such as usage frequency, load magnitude, maintenance practices, and working environment.
The torque arm connection design ensures that the height concentricity between the winch’s driving shaft (the reducer’s output shaft) and the driven shaft (the drum shaft) as well as the roundness of the driving shaft are maintained. This means: 1) smoother transmission, reducing additional torque and vibration; 2) lower noise levels; 3) reduced wear on components, thereby extending the service life of the equipment; 4) improved overall operational accuracy and reliability, ultimately guaranteeing smooth and precise lifting and lowering of stage rigging.
This is made possible by Evo-Tech’s sophisticated drum-machining technology. Through precision machining, we ensure high consistency in the diameter of the wire-rope grooves on the drum as well as perfect concentricity at both ends of the drum. As a result, the wire rope remains securely within the groove throughout the winding process, effectively preventing it from slipping out of the groove. At the same time, we’ve installed a slack-rope detection conductive plate that can promptly detect any slack rope or overlapping issues caused by other special factors and trigger protective mechanisms accordingly. Thus, there’s no need for an anti-disengagement rod—this not only simplifies the structure but also guarantees safety.
The conductive plate for slack rope detection is typically installed at an appropriate position along the steel wire rope and operates by either making contact with the rope or sensing changes in its tension. When the steel wire rope experiences abnormal slackness for some reason, irregular winding on the drum, or even a slight tendency to come off the groove—resulting in sudden changes in tension—the state of the conductive plate will change (e.g., contact breaking or closing), thereby generating an electrical signal sent to the control system. This triggers an immediate alarm or activates the shutdown protection mechanism, preventing the accident from escalating.
Yes, this is an optimized design tailored to the dense arrangement of stage rigging bars. Its advantages include: 1) Shortening the wire-rope path and reducing unnecessary bends; 2) Optimizing the angle of the wire rope on the drum and leveraging the characteristics of nylon drums to further minimize wear and the risk of the rope slipping off the drum; 3) Improving space utilization, enabling compact placement of multiple hoists and accommodating the complex spatial environment of the stage grid.
Evo-Tech winches strictly adhere to industry standards for stage machinery. By precisely designing the drum’s length, diameter, and rope groove dimensions, we ensure that the steel wire rope is wound in a regular, single-layer fashion on the drum. This not only complies with safety regulations but also helps ensure even stress distribution across the steel wire rope, extending its service life and facilitating the effective operation of safety devices such as slack-rope detection systems.
Evo-Tech winches have been designed with full consideration of braking impact. The shock-absorbing properties of the nylon drum effectively absorb and cushion part of the impact energy generated during braking. At the same time, when paired with high-performance braking systems—such as electromagnetic brakes or hydraulic brakes—and equipped with rational control strategies (like soft braking), the braking impact force can be kept within a very small range, significantly reducing the dynamic load effects on the overhead structural foundation of the stage and ensuring the safety of the stage structure.
For long lifting rods that require multiple steel wire ropes to be suspended together, a Evo-Tech winch with a drum of sufficient length is typically equipped. The drum is machined with independent rope grooves corresponding to the number of steel wire ropes (or equipped with a specialized rope-arranging mechanism). Each steel wire rope is wound independently in its designated position on the drum and driven by the same winch, thereby enabling synchronized and smooth lifting and lowering of the single lifting rod.
The maintenance and upkeep of Evo-Tech winches are relatively straightforward. Daily attention should be paid to the following: 1) Regularly inspect the wire rope for wear, broken wires, and lubrication conditions, and perform lubrication and replacement according to specifications; 2) Check the sensitivity and operational status of the slack-rope detection conductive plate; 3) Keep the drum surface clean and avoid scratching the nylon surface with sharp, hard objects; 4) Regularly check the tightness of all connection points and the performance of the braking system.
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Headquarters:
Hebei Evo-Tech Machinery Manufacturing Co., Ltd.
Address:
No. 1 Evo-Tech Avenue, Yuanshi Economic Development Zone, Shijiazhuang City, Hebei Province
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