ingiant technology | industry new | May 12.2025
In modern commercial buildings, hotels, airports and other large buildings, revolving doors have long become iconic entrance and exit facilities. It not only improves the beauty and grade of the building, but also effectively isolates the indoor and outdoor airflow, playing a role in energy saving. Behind the stable operation of the revolving door, the revolving door slip ring plays a key role silently. As the core component of the revolving door to achieve power and signal transmission, it is like the "nerve hub" of the revolving door. Once a fault occurs, the automatic sensing, lighting, safety protection and other functions of the revolving door will not work properly. Therefore, a deep understanding of the revolving door slip ring is of great practical significance for both building facility maintenance personnel and practitioners in related industries.
What is a revolving door slip ring?
The revolving door slip ring is an electromechanical component specially designed and manufactured for revolving door equipment. Its core function is to achieve stable transmission of power, control signals and data between the stationary part and the rotating part during the continuous rotation of the revolving door.
From the perspective of structural composition, the revolving door slip ring is mainly composed of a rotor, a stator, a conductive ring, a brush and a housing. The rotor part is connected to the rotating main shaft of the revolving door and rotates with the door body; the stator is fixedly installed on a stationary structure such as a building door frame. The conductive ring is usually made of metal materials with high conductivity, such as copper alloy or precious metal alloy, which are evenly distributed on the rotor to form multiple independent conductive paths. The brush is made of a material with good conductivity and wear resistance and fits tightly on the surface of the conductive ring. When the revolving door rotates, the brush slides on the conductive ring, and through the contact between the two, a stable electrical connection is established, thereby ensuring that the current, control instructions, sensor signals, etc. can be transmitted from the stationary end to the rotating end uninterruptedly, ensuring the normal operation of the revolving door's automatic sensing, lighting system, safety anti-pinch device, access control system and other components.
Compared with other types of electric slip rings, revolving door electric slip rings pay more attention to adapting to the working characteristics of revolving doors. For example, it needs to have a certain degree of vibration and impact resistance to cope with the shaking that may occur during the operation of the door body; in terms of protection performance, it also needs to meet the dust and moisture requirements of the indoor environment to ensure long-term stable operation.
The core technical advantages and specific technical parameters of revolving door slip rings
1. Core technology advantages
a. Stable and reliable transmission performance: The revolving door electric slip ring adopts precise manufacturing technology and high-quality conductive materials, which can ensure stable power and signal transmission during the frequent start and stop and continuous rotation of the revolving door. Even if the door body speed changes, the brush and the conductive ring can still maintain good contact, avoiding problems such as current interruption and signal loss, and ensuring the stable operation of various functions of the revolving door.
b. Long life and low maintenance requirements: Through optimized design and selection of wear-resistant materials, the revolving door electric slip ring has a long service life. Its brush is made of special wear-resistant material, and the surface of the conductive ring is finely processed, which can effectively reduce the friction coefficient between the two and reduce wear. At the same time, the reasonable structural design makes the slip ring evenly stressed during operation, further extending the service life of the components. This greatly reduces the maintenance frequency and maintenance cost of the revolving door, and reduces the door body downtime caused by slip ring failure.
c. Good environmental adaptability: Although most revolving doors are installed indoors, they still face different environmental conditions, such as dust caused by large traffic flow and humidity changes in air-conditioned environments. The outer shell of the revolving door electric slip ring is usually made of materials with a high protection level, which has the characteristics of dustproof and moisture-proof. The protection level can reach IP54 and above, and can adapt to a variety of indoor environments to ensure normal operation in complex usage scenarios.
d. Flexible customization capabilities: Revolving doors of different types and specifications have differences in power requirements, signal transmission types, etc. The revolving door electric slip ring can be customized according to the specific needs of customers. Whether it is the number of channels, rated current, voltage level, or external dimensions, installation method, etc., it can be personalized to meet the special requirements of various revolving doors.
Specific technical parameters
2. Electrical performance parameters
a. Rated voltage: The common rated voltage range is generally 24VDC - 380VAC, which can be selected and customized according to the actual power demand of the revolving door. For example, for a revolving door that only contains a simple control circuit and a lighting system, 24VDC may be used for power supply; while for a revolving door equipped with a high-power drive motor, a higher voltage 380VAC power supply is required.
b. Rated current: Each current is usually between 5A - 50A, and the specific value depends on the power of each component of the revolving door. For revolving doors with a large drive motor power, the rated current of the required electric slip ring is also relatively high to ensure that sufficient power support can be provided.
c. Insulation resistance: Generally, the insulation resistance is required to be ≥1000MΩ (under 500VDC test conditions). Higher insulation resistance can effectively prevent leakage and ensure the safety of equipment and personnel. It also helps to reduce signal crosstalk and ensure the accuracy of signal transmission.
d. Withstand voltage: The withstand voltage between adjacent channels is generally ≥1500VAC (50Hz, 1min). This parameter reflects the ability of the slip ring to withstand voltage, ensuring that electrical breakdown and other faults will not occur under normal operating voltage and possible voltage fluctuations.
3. Mechanical performance parameters
a. Number of channels: 2 - 24 channels or more can be provided according to the functional requirements of the revolving door. For example, an ordinary revolving door may only need 4 - 8 channels for transmitting power, control signals and simple sensor signals; while an intelligent revolving door equipped with a complex access control system and multimedia display equipment may require 16 or more channels to meet the transmission requirements of multiple signals and power.
b. Maximum speed: It can usually meet the speed requirements of 0 - 15rpm for revolving doors. This speed range covers the normal operating speed of most revolving doors, ensuring that the electric slip ring can work stably during the rotation of the door body.
c. Working temperature range: The working temperature is generally between - 20℃ - +60℃, which can adapt to the temperature changes of most indoor environments. Even when the temperature fluctuates greatly in winter heating or summer air conditioning environments, normal operation can be guaranteed.
d. Protection level: The common protection level is IP54, which can effectively prevent dust from entering and withstand water splashes from all directions, meeting the protection requirements of the indoor environment. For revolving doors used in some special places, electric slip rings with higher protection levels can also be provided.
Application scenarios and equipment types of revolving door slip rings
Commercial buildings
Revolving doors are common entrance and exit facilities in large commercial buildings such as shopping malls and shopping centers. These places have a large flow of people and require high operating stability and safety of revolving doors. The revolving door slip ring is responsible for providing power to the drive motor of the door body to ensure that the revolving door can continue to rotate smoothly to welcome and evacuate a large number of customers; at the same time, it transmits the safety anti-pinch sensor signal. When a person or object is detected approaching, it promptly controls the door body to stop rotating or reverse to ensure the safety of personnel; in addition, it also transmits power and signals to the lighting system, advertising display screen and other equipment on the door body to enhance the image and attractiveness of commercial buildings.
Hotels and office buildings
In order to show their high-end image and provide convenient services, high-end hotels and office buildings usually choose revolving doors as the main entrance and exit. In the revolving doors of such places, in addition to realizing the basic power and signal transmission functions, the revolving door slip ring is also combined with the access control system, visitor management system, etc. By transmitting control signals, the authority management of the revolving door is realized, and only authorized personnel can enter; at the same time, with the automatic sensing device of the door body, it provides guests with a more intelligent and convenient entry and exit experience.
Transportation hubs
In transportation hubs such as airports, railway stations, and subway stations, revolving doors need to have higher reliability and safety to cope with the large flow of passengers entering and leaving. The revolving door electric slip ring here undertakes the important task of powering and transmitting signals for multiple systems of the revolving door, including emergency braking system, voice prompt system, surveillance camera, etc. When an emergency occurs, the electric slip ring can quickly and accurately transmit control signals to stop the revolving door quickly and ensure the safe evacuation of passengers; at the same time, ensure the normal operation of the monitoring equipment and monitor the entrance and exit in real time.
Special places
Some special places such as museums, exhibition halls, and high end clubs have unique requirements for the aesthetics and functionality of revolving doors. Revolving door electric slip rings can be customized according to these special needs, such as transmitting different color and brightness control signals for revolving doors with artistic lighting effects to create a unique atmosphere; or transmitting complex control instructions for revolving doors with special safety protection functions to meet the safety management requirements of the venue.
How to choose a high quality electric slip ring for a revolving door?
Clear application requirements
a. Determine electrical parameters: According to the specific configuration and functional requirements of the revolving door, accurately determine the rated voltage, rated current and number of channels of the electric slip ring. Calculate the power and signal transmission requirements of each component of the revolving door (such as drive motor, sensor, lighting equipment, etc.) in detail to ensure that the electrical parameters of the selected electric slip ring can meet the requirements for the normal operation of the door body. For example, if the revolving door is equipped with a high-power DC drive motor and multiple sensors, it is necessary to select an electric slip ring with a larger rated current and a larger number of channels.
b. Consider the use environment: Although revolving doors are generally installed indoors, the environmental conditions in different places are still different. Consider factors such as the size of the flow of people in the place (large flow of people may lead to increased dust), whether it is close to the seaside (salt spray corrosion may occur), and changes in indoor temperature and humidity, and select electric slip rings with corresponding protection performance and environmental adaptability. For example, in buildings near the sea, electric slip rings with anti-salt spray corrosion capabilities should be selected; in places with more dust, products with higher protection levels should be selected.
c. Combined with the characteristics of the door body: Different types of revolving doors (such as two-wing revolving doors, three-wing revolving doors, four-wing revolving doors, etc.) have differences in structure and operation mode, and have different requirements for the installation size and speed adaptability of the electric slip ring. When selecting an electric slip ring, you must fully consider the specific structure and operating parameters of the revolving door to ensure that the electric slip ring can perfectly adapt to the door body and ensure the convenience of installation and operation.
Inspect product quality
a. Check materials and processes: High-quality revolving door electric slip rings usually use high-quality raw materials. The conductive ring generally uses high-purity copper alloys or precious metal alloys to reduce resistance, improve conductivity and wear resistance; the brush uses special carbon graphite materials or precious metal composite materials to ensure good conductivity and long life; the outer shell uses high-strength, corrosion-resistant engineering plastics or metal materials. At the same time, the manufacturing process is also crucial. Precision processing technology can ensure the surface finish of the conductive ring and the contact accuracy between the brush and the conductive ring, thereby improving the performance and stability of the electric slip ring.
b. Evaluate brand and reputation: Give priority to suppliers with good brand reputation and rich production experience in the field of revolving door electric slip rings. Well-known brands are often more stringent in R&D investment, production management and quality control. Their products have been tested by the market for a long time and the quality is more guaranteed. You can understand the reputation of different brands by consulting industry information, online evaluation, consulting peers, etc., and choose brands and products with high user evaluation.
c. Verify certification and test reports: Make sure that the selected revolving door electric slip ring has relevant quality certifications and test reports, such as ISO quality management system certification, CE certification, etc., as well as electrical performance test reports and mechanical performance test reports issued by third-party organizations. These certifications and reports are strong proof that the product quality meets the standards, which can help users judge whether the product is reliable and avoid purchasing substandard products.
Comprehensive consideration of price and service
a. Reasonable budget planning: When choosing a revolving door electric slip ring, price is an important consideration, but price cannot be the only basis for decision-making. Too low a price may mean that there are hidden dangers in product quality, and too high a price may not necessarily bring matching performance improvements. Under the premise of ensuring that the product quality and performance meet the needs, combined with your own budget, you should compare the products of multiple suppliers, comprehensively evaluate the price and performance, and choose the most cost-effective electric slip ring.
b. Pay attention to after-sales service: High-quality after-sales service can solve the worries of users during use. Choose suppliers who can provide timely technical support, product maintenance, and replacement services. For example, when the electric slip ring fails, the supplier can respond quickly and arrange professional technicians to repair or replace it, shortening the downtime of the revolving door and reducing the impact on the normal operation of the venue. At the same time, good after-sales service also includes providing product installation guidance, use training and other services to help users better use and maintain the electric slip ring.
Maintenance and troubleshooting of revolving door electric slip rings
Daily maintenance points
a. Cleaning and maintenance: Regularly clean the revolving door electric slip rings, which is an important measure to keep them in good operating condition. Use a clean soft cloth or dust-free cloth to gently wipe the outer shell of the electric slip ring to remove dust and dirt on the surface; for the contact area between the brush and the conductive ring, you can use special cleaning agents and tools to clean it, remove possible impurities such as carbon powder and metal debris, maintain the smoothness of the contact surface, reduce contact resistance, and ensure stable transmission of power and signals.
b. Check the connection parts: Frequently check the connection cables between the electric slip ring and the various components of the revolving door to ensure that the connection is firm and there is no looseness, damage, oxidation, etc. Loose connections may increase contact resistance, cause heating or even sparks; damaged cables will affect the transmission of power and signals, and even cause safety accidents. When problems are found in the connection parts, the cables should be tightened, repaired or replaced in time to ensure the reliability of the electrical connection.
c. Monitor the operating status: During the operation of the revolving door, pay close attention to the operating status of the electric slip ring. By observing the operation of the revolving door (such as whether there is abnormal pause, unstable speed, etc.), checking the working status of related equipment (such as whether the lighting is normal, whether the safety anti-pinch function is sensitive, etc.), indirectly judge whether the electric slip ring is working normally. You can also use professional testing instruments to regularly measure the electrical parameters of the electric slip ring (such as resistance, voltage, current, etc.), compare them with normal parameters, and promptly discover potential fault hazards.
Common faults and troubleshooting methods
a. Abnormal power transmission: If the revolving door has power shortage, unstable motor operation or stops working, first check whether the connection cable of the electric slip ring is normal, including whether the cable is damaged and whether the joint is loose. If there is no problem with the cable, check the contact between the brush and the conductive ring to see if there is wear, oxidation, carbon deposition, etc. It can be checked and repaired by cleaning the brush and conductive ring, adjusting the brush pressure, and replacing the severely worn brush. If the problem still exists, it may be that the conductive ring inside the electric slip ring is faulty, and further inspection and repair by professionals is required.
b. Signal transmission failure: When the automatic sensing function of the revolving door fails, the safety anti-pinch device is not sensitive, or the access control system cannot work properly, etc., first check whether the signal cable connection is firm and whether it is subject to electromagnetic interference. For signal transmission with shielding requirements, ensure that the shielding layer is well grounded. Then check the signal transmission path inside the electric slip ring to see if there are problems such as open circuit and short circuit. You can use tools such as a multimeter to detect the signal path, find the fault point and repair it. If the signal processing circuit inside the electric slip ring fails, you may need to replace the corresponding circuit board or component.
c. Slip ring overheating: The electric slip ring overheats during operation, which may be caused by current overload, excessive contact resistance or poor heat dissipation. First check whether the operating current of each component of the revolving door exceeds the rated current of the electric slip ring. If the current is normal, check the contact between the brush and the conductive ring to see if there is poor contact or severe local wear. Poor contact will increase the contact resistance, thereby generating too much heat. In addition, check whether the heat dissipation conditions of the electric slip ring are good, such as whether the housing ventilation holes are blocked, whether there are heat dissipation obstacles, etc., and clean the ventilation holes in time to improve the heat dissipation environment.
d. Abnormal noise: The electric slip ring generates abnormal noise during operation, which may be caused by loose mechanical parts, wear or insufficient lubrication. Check whether the fixing screws of the electric slip ring are loose, whether the rotating parts such as bearings are seriously worn, and whether the lubrication is in good condition. According to different reasons, take measures such as tightening screws, replacing worn parts, and adding lubricants to solve them. If the noise still exists, it may be necessary to further check the internal structure of the electric slip ring to find out the specific noise source and repair it.
Industry Trends: Technological Innovation of Revolving Door Electric Slip Rings
Intelligent Development
With the continuous development of the Internet of Things and artificial intelligence technologies, revolving door electric slip rings will also move towards intelligence. In the future, electric slip rings may integrate sensors and smart chips, which can monitor their own operating status in real time, such as temperature, speed, wear degree, contact resistance and other parameters, and transmit these data to the building equipment management system through the network. Through data analysis, early warning of electric slip ring failures can be achieved, maintenance can be arranged in advance, and revolving door shutdown due to slip ring failures can be avoided; at the same time, the operating speed and mode of the revolving door can be intelligently adjusted according to data such as passenger flow, so as to improve traffic efficiency and energy saving effects.
Miniaturization and Integration
In order to adapt to the increasingly compact structural design and higher integration requirements of revolving doors, revolving door electric slip rings will continue to develop in the direction of miniaturization and integration. By adopting new materials and optimizing designs, the volume and weight of electric slip rings can be reduced while ensuring performance, so that they can better adapt to various types of revolving doors. At the same time, more functional modules are integrated into the electric slip ring, such as signal amplification, filtering, A/D conversion, etc., to reduce external connection cables and equipment, improve the integration and reliability of the system, and reduce installation and maintenance costs.
Green environmental protection and energy saving
Under the global trend of advocating green environmental protection and energy conservation and emission reduction, the electric slip ring of the revolving door will also pay more attention to green environmental protection and energy-saving design. On the one hand, the use of environmentally friendly materials to manufacture the electric slip ring can reduce the pollution to the environment during production and use; on the other hand, by optimizing the design and improving the conductivity, the energy loss of the electric slip ring during operation can be reduced, the energy utilization efficiency can be improved, and the energy saving goal of the building can be contributed.
Conclusion: Choose a reliable supplier of electric slip rings for revolving doors
As the key core component of the normal operation of the revolving door, the performance of the revolving door electric slip ring is directly related to the safety, stability and user experience of the revolving door. From basic concepts, core technologies to application scenarios, purchase points, maintenance methods and industry trends, we have a comprehensive and in-depth understanding of the revolving door electric slip ring.
In practical applications, it is very important to choose a reliable supplier of electric slip rings for revolving doors. A reliable supplier can not only provide high-quality products that meet the needs, but also provide strong guarantees in terms of technical support and after-sales service. When choosing a supplier, it is necessary to conduct a comprehensive assessment of its product quality, technical strength, service level, price and other factors through multi-faceted inspections and comparisons, and make wise decisions to ensure the stability of the revolving door.
I hope this article can help you. If you have encountered problems related to revolving door slip rings in actual applications, or want to further explore some technical points in the article, please feel free to communicate with us.
Post time: May-14-2025