Tachometer with full symbol indication, auto range, data hold, controllable automatic shutdown, laser emission sampling function, sample rate adjustable, etc., can be used to measure speed and count. Different types of instruments are required for different applications to reduce the tachometer usage error. The following small series will introduce you to the category of tachometer:
Tachometer with full symbol indication, auto range, data hold, controllable automatic shutdown, laser emission sampling function, sample rate adjustable, etc., can be used to measure speed and count. Different types of instruments are required for different applications to reduce the tachometer usage error. The following small series will introduce you to the category of tachometer:
1, centrifugal tachometer
The balance between centrifugal force and tension is used to indicate the rotational speed. Centrifugal tachometer is the most traditional speed measurement tool. It is a mechanical tachometer that uses the principle of centrifugal force. The measurement accuracy is generally 1~2, and it is generally installed on site. An excellent centrifugal tachometer is not only accurate and intuitive, but also has the advantages of reliability and durability. But the structure is more complicated.
2, magnetic tachometer
Using a rotating magnetic field, a rotational force is generated on the metal cap, and the rotational speed is indicated by the balance of the rotational force and the balance of the balance. The magnetic tachometer is a model for the successful use of magnetic force. It is a mechanical tachometer that uses the principle of magnetic force; it is generally installed on site, and can be installed at a short distance with a flexible shaft. The magnetic speed is more commonly used in motorcycles and automobiles and other mechanical equipment due to its simple structure. The flexible shaft is easily damaged when installed in a different place.
3, electromotive force tachometer
It consists of a small alternator, cable, motor and magnetic meter. The small alternator generates alternating current, and the alternating current is transmitted through the cable to drive the small alternating current motor. The speed of the small alternating current motor is consistent with the rotational speed of the shaft to be measured. The magnetic speed head is coaxially connected with the small AC motor. The speed indicated by the magnetic meter is naturally the speed of the shaft to be measured. The electric speed is very convenient to install in different places and has good anti-vibration performance. It is widely used in diesel engines and marine equipment.
4, magnetoelectric tachometer
Magnetic sensor and ammeter are very convenient to install in different places.
5, flash tachometer
Use the principle of visual persistence. In addition to detecting the rotational speed (reciprocating speed), the flash tachometer can also observe the static image of the reciprocating object, which is an indispensable observation tool for understanding the working state of the mechanical equipment.
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Label: Category of tachometer
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Sectional Door Accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
Detail introduction for above main accessories
1.Motor and controller:
The garage door operator is designed for residential overhead sectional and tilt doors.
The operator memorizes the limit positions and unique braking system that slows the unit down at the end of its travel.
Rolling code remote control with max. 20 pcs hand transmitters.
The operator is equipped with a manual release lever which allows manual operation of the door in case of power failure.
The controller has a security LOCK function which prevents operation of the door from transmitter.
2.spring break device:
Sectional doors are hinged and they bend in the tracks as the door opens and closes. Many of these doors are counterbalanced with extension springs, also designated "stretch springs," and they have seven characteristics. The length is the measurement of all the coils pressed together. This, along with the inside diameter of the coils and wire size - the thickness of the wire from which the springs are made - determine the stretch, the distance the spring is extended - normally half the door height, and pull, the force the spring pulls when stretched its normal length. The type of ends determine how the ends of the spring are mounted. The initial tension is the percentage of pull needed to separate the coils. This is determined by the pitch with which the springs are wound. On sectional garage door springs this is normally 15 percent. For example a 100 pound pull spring requires 15 pounds of weight to separate the coils; when a door is open the two springs will support 15 pounds of door weight without any stretch.
Most extension springs are made of oil tempered wire. These are normally coated or painted. Some springs are made of galvanized wire.
3.able break device:
cable break device ,door hardware
adjustable bottom bracket .
the raw material hot plate
zinc plated
safety device
adjustable bottom bracket
the raw material hot plate
zinc plating
spring safety device ,2" and 3" safety device
once the cable is broken ,this devoice can keep the hurt away from the door falling
4.aluminum alloy rope pulley
Equipment: CNC stamping/punching machine, CNC bending machine, CNC cutting
machine, 5~250 tons punching machines, welding machine, polish machines...
Processed material: stainless steel: copper, carbon steel
Surface treatment: Hot galvanized, polishing
Making process:Stamping, deep drawing,bending, punching, laser cutting,threading,
welding, tapping, riveting, grinding
5.air bag system
It is a safety device. When the door is down to hit something, it will up automatically.
Operation pressure:<3mbar
Battery:CR2032*2
Battery lifetime>1 year
Emission frequency: 315MHZ
Emission power:<10mW
Receiver power source:12V
6.duplex enhanced guide wheel bracket
Determining the right type of sectional door roller for your garage door tracks can be a little confusing, especially when you do not know what you need to look for in a garage door roller. To simplify things, there are two primary things you need to be aware of. First are the actual dimensions of the roller, and second is purpose that you will be using the door for. You can read below about measuring your roller and choosing the right quality of material for your door.
Other Door Accessories,Electronic Door Accessories,Automatic Door Accessories,High Speed Door Radar Detector
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.pvchighspeeddoor.com