Slip ring is responsible for connecting and conveying the rotating bodyenergyAndsignalThe electrical components of.According to the transmission medium, the slip ring is divided intoElectric slip ringFluid slip ring and smooth ring can also be commonly referred to as "rotary connection" or "rotary connection".The slip ring is usually installed at the rotating center of the equipment, which is mainly composed of rotating and stationary parts.The rotating part connects the rotating structure of the equipment and rotates with it, called“rotor”The energy source of the stationary part connecting the fixed structure of the equipment is called“stator”。
Slip ring, also known as rotary electrical interface, electricalRotary jointIt can be used in any electrical system that transmits power and data signals from a fixed structure to a rotating structure when unrestricted continuous rotation is required.
Figure 1
Using the sliding orrolling contact 、Electrostatic couplingorelectromagnetic coupling , onAntenna pedestalA device that transmits electrical signals and energy between rotating parts and stationary parts.There are driving elements, measuring elements and control elements on the rotating parts, which must be transmitted control signals and supplied with power from the machine room.This requires various slip ring components to transmit signals and energy.yes , we haveradarMore than 100 lines need to be connected by rotation.The slip ring assembly can be divided into low-frequency slip ring, intermediate frequency slip ring and high-frequency rotating hinge according to the frequency of the transmission signal.Slip rings usually refer to the first two.The electrical performance indicators of slip ring components are: insulation resistance, contact resistance, dielectric strength and crosstalk.For intermediate frequency slip ring, shielding, impedance matching, noise voltage, etc. should be considered because of high frequency.In the structural design, it is necessary to ensure reliable contact and continuous connection of all lines.Therefore, it is required that the materials used for the brush have good conductivity, appropriate pressure on the slip ring, small eccentricity and shaking of the slip ring, good wear resistance, small friction torque and easy maintenance.
Low-frequency slip ring
Figure 2
A slip ring component that uses sliding contact to transmit low-frequency signals and energy.Common slip rings are cylindrical slip rings anddifferentialThere are two kinds of slip rings.The conductive ring of cylindrical slip ring is divided into flat ring and V-ring.The conductive ring is usually made of copper, brass, silver and gold.The brushes include palladium, gold alloy or gold plated wire brushes and copper graphite composite brushes.If there are many slip rings, the cylindrical slip ring is composed of two sets of brushes and a differential adapter plate (Figure 1), but its axial size is large. The use of differential slip rings can significantly reduce the axial size, volume and weight.The differential slip ring is composed of upper and lower groups of brushes and a differential adapter plate.The upper brush rotates with the antenna azimuth, and the lower brush is fixed. There are two sets of contact pieces on the differential adapter plate. The corresponding contact pieces are connected by wires, and the speed is 1/2 of the azimuth speed by using the differential mechanism.When the antenna rotates, the current flowing into each brush passes through one or two contact sheet circuits on the differential rotary table and flows out from the corresponding upper brush to ensure that the circuit between the fixed part and the rotating part is always connected.The worn powder of sliding contact slip ring may cause short circuit between rings.Therefore, it shall be structurally easy to clean, usually using a combined structure for on-site maintenance or replacement of components.
Intermediate frequency slip ring
Figure 3
Slip ring assembly used to transmit radar IF (tens of megahertz) signals and energy.This slip ring has high frequency and needs shielding.Ordinary slip rings can also be used to transmit signals below 12 MHz.One looped central conductor and one outer layer of looped cable asShield ring(Figure 2).Transmission of signals above 12 MHz usually uses shielded slip rings with coaxial lines.The cross section of the slip ring is groove shaped, which is essentially a rectangular coaxial conductor.There is also a capacitive intermediate frequency slip ring (Figure 3). The central conductor is annular and is supported in the shielding layer with an insulating pad. There is a gap between the rotating part and the fixed part, which does not contact each other. The intermediate frequency signal is coupled through capacitance.In case of limited rotation range of antenna, cable winding device can be used instead of slip ring.
background
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In modern times, in the high-end field of industrial equipment, there are many requirements for multiple relative movements such as revolution and rotation.That is, while the mechanical equipment rotates 360 ° continuously, the rotating body also needs multiple movements.Movement requires energy, such as electric energy, fluid pressure energy, etc.Sometimes, it is also necessary to control the signal source, such as optical fiber signal, high-frequency signal, etc.It is necessary to transmit functional power supplyweak currentSignal, optical signal, air pressure, water pressure, oil pressure and other different energy media to ensure that the electrical appliances can move freely when rotatingelectromechanical equipment, must use a rotary communication device.
Slip ring introduction
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The slip ring as a whole relies on the elastic lapping principle, rolling lapping principle, or sealing principle, as well as the ingenious design of movement structure and sealing structure, precise parts manufacturing and matching, and reasonable material selection to form a stable and reliable rotary communication system.As long as the slip ring is attached to the infinitely rotating equipment, it can provide power to the rotating body, so that the rotating body can carry out other movements or detect the working condition under the rotating state while rotating infinitely.
Traditional electric slip ring
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Slip ring
Also known as“Collector ring”Or "slip ring".There are mature design technologies and mature manufacturing plants in China decades ago, which mainly transmit large current and adoptCarbon brushClose to the copper ring technology.Disadvantages: It is limited to transmitting large current, and a large amount of carbon alloy powder is generated due to friction, which requires regular cleaning or replacement of carbon brush.Because modern precision electronics and precisionElectromechanical productsThe rapid development and precision ofElectric slip ringemerge as the times require.It was originally dedicated to aviation, aerospace and other ultra high-end fields. Now, it has been widely used for civil precision electronic and electrical equipment.Some series have been made intoGEAccessories.
Electric slip ring is the most widely used in all slip ring series, also known asbrush、Carbon brush、Collector ring、Collector ring、Slip ringThe rotary electrical joint is specially used to transmit power supply and signal power supply during unrestricted continuous rotation.The stator and rotor parts lead out wires respectively to connect the power supply and terminal appliance of fixed structure and rotating structure, and rotate accordingly.According to the difference of its overall structure, it is divided into solid round slip ring (dig a hole in the rotating body to install the slip ring), hollow round slip ring (install the slip ring on the rotating shaft), and separation slip ringFlat disc slip ring、Mercury slip ring, special slip rings, etc.
purpose
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Slip rings are mostly used in high-end industrial electrical equipment or precision electronic equipment with multi-function, high-performance, high-precision, and multiple continuous rotating movements, such as aerospace equipmentradarCommunication equipment, medical equipment, automatic processing equipment, smelting equipment, mining equipment, cable equipment, amusement equipment, display equipment, intelligent camera, chemistryreaction kettle, crystal furnace, wire rodStrander、windmill、Mechanical arm, robottbm , revolving door, measuring instrument, model airplane, special automobile, special ship, etc.Slip rings provide reliable energy and signal transmission scheme for these electromechanical devices to realize complex movement.It can also be said that the slip ring is the symbol of advanced intelligent sports equipment.
Slip ring
The slip ring can also be made into various special shapes according to the use conditions, and can be used as a hybrid transmission power supply, light source, fluid pressure source, or matched with other electrical components, such as: special special shape, super large shape, integrated gearSprocket, pulley, plug, power source mixed with light source, power source mixed with pressure fluid, equipped with optical, electrical, acoustic, temperature sensorsOptical transceiver, pressure gauge, pneumatic components, etc., to form a multi-functional electrical component assembly to meet the special requirements of space saving and simplified design structure.
Slip Ring
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Conductive slip ring belongs to the application category of electric contact sliding connection. It is also called collector ring, or rotary joint, rotary electrical interface, slip ring, collector ring, return ring, coil, commutator, adapter. It is a precision transmission device that realizes the image, data signal and power transmission of two relative rotating mechanisms.It is particularly suitable for applications where unlimited continuous rotation is required and power or data transmission is required from a fixed position to a rotating position.
It consists of elastic material - brush, sliding contact surface material-Conductive ringInsulating material, bonding material, combined supportPrecision bearingDust cover and others
Slip ring (20 pieces)
Auxiliary parts, etc.
BrushPrecious metal alloyThe material is in symmetrical double contact with the conductive ring groove in the form of "II", and transmits signals and currents by means of the elastic pressure of the brush and the sliding contact of the conductive ring groove.
preciseSlip Ring It is a high-tech product and has been used in the cutting-edge military field for a long time. It is a key component of various precision turntables, centrifuges and inertial navigation equipment.
With the continuous development of China's economy, more and more people are involved in the use of such products in the civil field for industrial automatic system control.In advanced developed countries abroad, such products have gradually transformed from military products to civil products. In recent years, they have achieved standardized and batch production, and are widely used in security, factory automation, power, finance, instrumentation, aviation, military, transportation, construction and other electromechanical equipment.
Electric slip ring
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Electric slip ring: As its name implies, the slip ring used for conducting electricity is the most widely used in all slip ring series, also known as collector ring, collector ring, slip ring, rotary joint and rotary electrical joint, and it is specially used to transmit power and signal power supply during unrestricted continuous rotation.The stator and rotor parts lead out wires respectively to connect the power supply and terminal appliance of fixed structure and rotating structure, and rotate accordingly.According to the different overall structures, it can be divided into solid round slip rings (dig a hole in the rotating body to install the slip rings), hollow round slip rings (install the slip rings on the rotating shaft), and separation slip rings, flat disk slip rings, mercury slip rings, special slip rings, etc.
Electric slip ring (1 piece)
Electric slip ring: it is an electrical part that is responsible for connecting and transmitting energy and signals for the rotating body.According to the transmission medium, the slip ring is divided into electric slip ring, fluid slip ring and smooth ring.It can also be popularly referred to as "rotary connection" or "rotary connection".The slip ring is usually installed at the rotating center of the equipment, which is mainly composed of rotating and stationary parts.The rotating part connects the rotating structure of the equipment and rotates with it, which is called "rotor", while the stationary part connects the energy source of the fixed structure of the equipment, which is called "stator".The slip ring as a whole relies on the elastic lapping principle, rolling lapping principle, or sealing principle, as well as the ingenious design of movement structure and sealing structure, precise parts manufacturing and matching, and reasonable material selection to form a stable and reliable rotary communication system.As long as the slip ring is attached to the infinitely rotating equipment, it can provide power to the rotating body, so that the rotating body can carry out other movements or detect the working condition under the rotating state while rotating infinitely.
Brush slip ring
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Qu's current collectorSolve the historical problems of wire winding machine brushes and slip rings
The Best Solution to the Brush Slip Ring Problem of High Voltage and High Power Winding Motor
Founder: Qu Weiqian (China)
Nature: new theory of motor speed regulation with independent intellectual property rights in China
Keywords: winding machine 3-year maintenance free brush slip ring jitter collector speed regulation industrial energy-saving energy-saving energy-saving motor speed regulation internal feedback speed regulation chopper internal feedback chopper control
Although the wound type asynchronous motor has obvious advantages in starting and speed regulation, it has fatal defects such as slip rings and brushes. This is a long-standing problem that has plagued the wound type asynchronous motor since the history of asynchronous motor. If it cannot be properly solved, it will not only affect the starting and speed regulation control of the electric motor, but also affect the operation of the motor,The harm to production is conceivable.Because of this fatal defect, the winding asynchronous machine has been greatly limited in application, which devalues its advantages. It has not been applied in many occasions where it should be used, and its utilization rate is far lower than that of the squirrel cage asynchronous machine.
Qu's current collector is a high-tech product that Qu Weiqian led his Baoding North Speed Regulation Company to invent, develop and produce the current collecting device specially used to solve the problems of traditional motors - slip rings and brushes, which have a large amount of maintenance and affect the production of users.Solved the fatal defect of the 200 year old traditional winding motor collector[1]。
