Description

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Quarter-turn Electric Actuator

product-314-351

Product Features

★This product can accept a variety of input signals Such as 0-10mA, 0-20mA, 4-20mA, 0-5V, 1-5V, 0-10v, etc., which are convenient for connection with computers and regulating instruments.

★Feedback detection element A high-performance conductive plastic potentiometer with 1/250 decomposition capability is used to improve the control accuracy of the actuator.

★With servo function Automatic, manual, soft manual and hard manual control can be realized without additional servo amplifier.

★ Equipped with an external setter. The setter can be wired or wireless, and it is convenient to set and adjust the parameters of the actuator without changing any wiring. Such as: adjustment of stroke range, selection of input signal, conversion of forward and reverse action, zero point of position feedback, correction of full range, setting of upper and lower limits, etc., and alarm function can also be added.

★With a switch input (passive contact signal) As external hand, automatic switching.

★With multi-channel switching value contact output (high and low level adjustable) They are power-off alarm, over-torque alarm, maximum upper limit alarm, maximum lower limit alarm, manual and automatic state switching contact output, and input signal disconnection alarm.

★When the off signal is input, it can be fully opened, fully closed, maintained or set to any value between 0-100% by the user.

★The upper and lower limit switches are used in the hardware, so that the actuator has double protection.

★With soft manual function, it is more convenient for maintenance and debugging.

★The input signal and the position feedback output signal adopt the measure of photoelectric isolation, which is convenient to connect with the upper computer such as the computer.

★The drive motor adopts a high-horsepower AC reversible motor, which has the characteristics of high power and low noise.

★The system has the function of automatically powering off within 6 seconds when there is foreign matter in the valve or motor failure causes over-torque.

★According to the needs of users, this actuator can also add PID calculation function. Its input signal can be the above signal, which can be selected arbitrarily by the user.

★The output shaft of the linear actuator is equipped with a compression spring to ensure the closing force of the valve. The compression spring cooperates with the software limit switch and the hardware limit switch to ensure the tight closing of the valve.

★A torque switch can be attached to the quarter-turn actuator to realize overload protection. *This function can be set arbitrarily by the user within the full stroke range.

product-303-320

SKJ Series Intelligent Quarter-turn

Model	Output torque N.m	Action time S/90°	Maximum rotation angle	Power KW	Power supply
SKJA-02	20	25	90°	0.025	220V AC
SKJA-05	50	25		0.025
SKJB-10	100	34		0.04
SKJB-20	200	34		0.04
SKJC-30	300	42		0.06	220V AC 380V AC
SKJC-50	500	42		0.09
SKJC-60	600	48		0.09
SKJC-80	800	63		0.12
SKJD-100	1000	30		0.20
SKJD-160	1600	42		0.20
SKJD-250	2500	60		0.25
SKJD-400	4000	100		0.25
SKJD-600	6000	80		0.37
SKJD-800	8000	200		0.80
SKJD-1000	10000	250		1.00
SKJD-1200	12000	250		1.50
SKJD-1800	18000	280		2.00
SKJD-2500	25000	280		2.20

Product Structure

Ordinary Quarter-turn Electric Actuator

product-720-290

Main technical parameters of normal actuator

Name	Technical parameters
Input signal	Modulating type ：0-10mA、4-20mA；On-off type：trigger type dry contact signal, button type dry contact signal
Input resistance	250Ω
Valve position output signal	Optional (0-10mA, 4-20mA, 0-10v, 1-5v, etc.)
Resolution	Above 0.5%
Load capacity	4-20mA时≤750Ω；0-10mA时≤1KΩ
Input, output signal	Electrical isolation
Sensitivity	±(0.5-5%)F.S
Repeatability	±1%，±2.5%
Basic error	±1%，±2.5%
Adjustment range	Zero point 0-50%, full range 50-100%
Travel range	SKZ series 10-250mm choose arbitrarily；SKJ series 0-90° choose arbitrarily
Output force (moment)	SKZ series 1600-40000N；SKJ series 20-25000N.m
Alarm Output	Various options
Full travel time	SKZ series 7-250S； SKJ series 25-280S/90°
Action mode	Use the setter to set to realize positive and negative actions
Motor	AC reversible motor
Power consumption	40-350W
Power supply	220V/380V AC±10% 50Hz±2%
Installation method
Working environment	Temperature：-25~+70℃；Humidity：＜85% no corrosive gas
Allow vibration	Below 1.5G (if there is a special vibration environment, it can be customized according to user requirements)
Wiring port size	M20X1.5
Protection level	IP65、IP67

product-329-354

Working Principle

SKZ, SKJ series intelligent electronic electric actuators use 220V single-phase or 380V three-phase AC as the driving power, and they accept analog signals from computers, regulators or manipulators to work. The electronic control unit is a position locator made by a single-chip microcomputer, which itself has a servo function.

The SKZ series drives the drive belt to the passive pulley through the rotation of the reversible motor. The passive pulley and the output shaft are connected with trapezoidal threads. The rotation of the passive pulley makes the output shaft move upward or downward by the anti-rotation pin. Through the gear transmission of the feedback mechanism to the precision potentiometer.

The SKJ series drives the driving pulley through the rotation of the reversible motor, and the synchronous belt is transmitted to the passive pulley, and then converted into a 90° or other angle rotation of the output shaft through the worm and worm gear. Use the feedback shaft fixed on the upper part of the output shaft to detect the output, and transmit it to the precision potentiometer through the spur gear. The precision potentiometer adopts a conductive plastic potentiometer with a return spring.

In the SKZ series, the feedback part is equipped with an additional spring to make the rack move freely up and down, and offset the gap between the gears. In the SKJ series, due to the function of the return spring , so the backlash of the spur gear is canceled out. Potentiometers allow gapless contact.

The rotation of the precision potentiometer is fed back to the position locator as an opening signal. As a result, the position locator compares the opening signal with the control signal from the upper computer, and then sends a rotation command to the motor to make the difference between the two signals The deviation is reduced, and when the deviation is removed, the positioner commands the motor to stop at that position. The settings of stroke zero and full stroke are determined by software, and mechanical limit switches are used for secondary protection of the actuator. Therefore, the setting of the mechanical limit switch is required to be within the normal travel range. Adjustment of the mechanical limit switch: SKZ series adjust the position of the micro switch, see (Figure 3).

SKJ series ordinary type and explosion-proof type adjust the position of the limit plate angle, see (Figure 4)

product-312-345

Adjustment of Intelligent Position Locator

(1) Main features

1. Using single-chip microcomputer and peripheral components, all functions and parameters can be set by hand-held setting device or wireless setting device, and the adjustment becomes very simple and accurate;

2. Electrical isolation between input signal and valve position output signal;

3. Use the setter to easily set the upper and lower limits of the actuator;

4. Using the setter, it is convenient to realize the positive and negative effects of the actuator (it is set to positive action when leaving the factory);

5. By changing the connection method of ① and terminals on the terminal board of the locator (A), it is convenient to select the output "hold" (①, ② terminals are not short-circuited) and the output is the preset value ( ①, 2 terminals short circuit);

6. When the input signal is disconnected, the output 'preset' value can be set in advance using the setter within the range of 0-100%;

7. It is very simple and accurate to use the setter to adjust the zero point and full range of the valve position output, and it can be done once, and the installation of the valve position feedback potentiometer does not need to be precise;

8. When there is foreign matter in the valve that causes over-torque (the valve position signal does not change), the position locator will automatically turn off the power of the servo motor after 8 seconds. (2) Connection method

1. Connect correctly according to the wiring diagram on the intelligent position locator;

2. Open the cover plate of the wiring port of the setting device at the bottom of the actuator, and insert the data cable plug of the handheld setting device into the USB socket in the wiring port of the setting device (support hot plugging), (if equipped with remote control setting There is no need to perform the second step, just align the remote setter with the random setter at the bottom of the actuator and operate within 1 meter);

3. After confirming that the wiring is correct, turn on the 220V power supply. After a few seconds, the digits on the upper row display the pinyin abbreviation of "Tianyi", and the digits on the hand-held setting device are displayed as scanning, and enter the communication waiting state.

product-361-322