阅读说明：本技术 一种卧螺机扭矩检测装置及其控制方法 (Horizontal screw machine torque detection device and control method thereof ) 是由 杨超 高建生 王存林 卢仁伟 朱兆帅 陈鑫 于 2021-09-14 设计创作，主要内容包括：本发明提出的一种卧螺机扭矩检测装置,包括机座,所述机座的两个长横梁之间安装有差速器,所述差速器的输入轴通过过盈配合与扭矩臂固定连接,所述扭矩臂与输入轴的连接处还设有用于传递螺旋输送器扭矩的平键；所述机座的外侧短横梁上具有用于安装杠杆臂的安装位,杠杆臂通过销轴固定于安装位上,且所述杠杆臂可绕销轴进行旋转；所述杠杆臂上安装有扭矩传感器,所述扭矩传感器由扭矩传感器头部和扭矩传感器杆部组成,扭矩传感器杆部包括一对用于传输扭矩的数据线。本发明能够对单电机卧螺机的螺旋推料器的扭矩进行实时检测及监控,并根据扭矩大小对进料泵和卧螺机进行自动控制,防止扭矩过大损坏差速器并造成卧螺机堵料及损坏。(The invention provides a torque detection device of a horizontal screw machine, which comprises a machine base, wherein a differential mechanism is arranged between two long cross beams of the machine base, an input shaft of the differential mechanism is fixedly connected with a torque arm through interference fit, and a flat key for transmitting the torque of a screw conveyor is further arranged at the joint of the torque arm and the input shaft; the short cross beam on the outer side of the base is provided with an installation position for installing a lever arm, the lever arm is fixed on the installation position through a pin shaft, and the lever arm can rotate around the pin shaft; the lever arm is provided with a torque sensor, the torque sensor comprises a torque sensor head and a torque sensor rod, and the torque sensor rod comprises a pair of data wires for transmitting torque. The device can detect and monitor the torque of the spiral material pusher of the single-motor horizontal screw machine in real time, and automatically control the feeding pump and the horizontal screw machine according to the torque, so that the differential mechanism is prevented from being damaged by overlarge torque, and the horizontal screw machine is prevented from being blocked and damaged.)

1. The utility model provides a spiral shell machine torque detection device crouches which characterized in that: the device comprises a base, wherein a differential mechanism is arranged between two long cross beams of the base, an input shaft of the differential mechanism is fixedly connected with a torque arm through interference fit, and a flat key for transmitting the torque of a screw conveyor is further arranged at the joint of the torque arm and the input shaft; the short cross beam on the outer side of the base is provided with an installation position for installing a lever arm, the lever arm is fixed on the installation position through a pin shaft, and the lever arm can rotate around the pin shaft; install torque sensor on the lever arm, torque sensor comprises torque sensor head and torque sensor pole portion, and the two all is cylindrically, it has the sensor that is used for the induction contact force to inlay in the torque sensor head, and torque sensor pole portion includes a pair of data line that is used for transmitting the moment of torsion.

2. The decanter torque detecting device of claim 1, wherein: the lever arm is composed of a lever arm body and a connecting part formed by extending upwards along one end of the lever arm body, the lever arm body is rectangular, a mounting hole for fixing a pin shaft is formed in one end, close to the connecting part, of the lever arm body, and a groove for fixing a limiting device is formed in the lower side of the lever arm body; the connecting part is trapezoidal, the lower bottom edge of the trapezoid is fixedly connected with one end of the lever arm body into a whole, and the upper bottom edge of the trapezoid is connected with an annular part used for accommodating the rod part of the torque sensor.

3. The decanter torque detecting device of claim 2, wherein: the limiting device is a pin, and the number of the limiting devices is at least one.

4. The complete horizontal screw machine torque detection device according to claim 3, characterized in that: the two pins are respectively arranged at two ends of the lower side of the lever arm body, and limit is carried out on the lever arm in two directions, so that the lever arm is kept at a fixed position and does not rotate.

5. The complete horizontal screw machine torque detection device according to claim 3, characterized in that: the pin is welded on a supporting block fixed on the base, the supporting block is of a cuboid structure and is welded on the side face of the short beam on the outer side of the base.

6. The decanter torque detecting device of claim 1, wherein: the structure of the torque sensor head is flat cylinder, one end of the torque sensor head is provided with a round counter bore, a sensor used for sensing contact force is embedded in the round counter bore, the structure of the torque sensor rod is long cylinder, the torque sensor rod is welded with the torque sensor head, and the diameter of the torque sensor head is larger than that of the torque sensor rod.

7. The decanter torque detecting device of claim 1, wherein: the structure of torque arm is the centrosymmetric structure of approximate cuboid shape, and half and the minor face on the long limit of torque arm are 90 contained angles, and half is 105 contained angles with the minor face, two hypotenuses parallel arrangement, and the hypotenuse is 105 with the minor face contained angle, and torque arm center is a round hole and opens there is the keyway.

8. The decanter torque detecting device of claim 5, wherein: and a control box for monitoring the torque sensor is further fixed on the side edge of the supporting block, and a data line penetrates through the control box and is connected with the torque sensor through the data line.

9. A control method of a horizontal screw machine torque detection device according to claim 1, characterized in that: comprises the following steps of (a) carrying out,

in the step 1, the method comprises the following steps of,

when the torque sensor works, the torque arm presses against the head part of the torque sensor, when the torque on the input shaft of the differential mechanism is increased, namely the torque range under normal working conditions is exceeded, the torque of the screw conveyor is increased, the contact force on the torque sensor is increased, and meanwhile, the torque is transmitted to the control box 5 for monitoring through a data line led out from the rod part of the torque sensor;

and 2, adjusting the flow of a solid-liquid mixture introduced into the horizontal screw machine through observation and tests, and simultaneously observing the separation effect of a solid phase and a liquid phase to obtain an optimal flow and a corresponding optimal torque value, thereby determining a safe torque range, namely 90-110% of the optimal torque value, closing the feeding pump once the torque exceeds the range and reaches an early warning value 1, namely 130% of the optimal torque value, simultaneously increasing the differential rotation speed until the torque is reduced, starting the feeding pump after the torque is reduced, and closing the horizontal screw machine and stopping the inspection if the torque is continuously increased to an early warning value 2, namely 150% of the optimal torque value.

Technical Field

The invention relates to a detection device and a control method thereof, in particular to a torque detection device of a horizontal screw machine and a control method thereof, and belongs to the technical field of engineering machinery.

Background

The horizontal screw machine is a processing equipment widely used in solid-liquid separation application, and its working principle is that the rotary drum and screw material-pushing device are rotated at a certain differential rotation speed in the same direction and high speed, the fluid suspended substance formed from liquid and solid is continuously introduced into the interior of screw material-pushing device by means of feeding pipe, and accelerated and fed into the rotary drum, under the action of centrifugal force the heavy solid matter is deposited on the wall of the rotary drum to form a sediment layer, the screw material-pushing device can continuously push the deposited solid matter into the conical rotary drum, and discharge it from the slag outlet, and the clear liquid produced therewith can be flowed into another end of the rotary drum, and discharged from overflow outlet. After being discharged from the slag outlet, the solid matters are thrown to the inner surface of the housing along the periphery and finally discharged out of the horizontal screw machine from the solid phase outlet under the action of self gravity. The slag discharging function is realized by the relative rotation motion between the spiral pusher and the rotary drum body, and the relative rotation motion is called as the differential rotation speed of a horizontal screw machine. The differential mechanism is used for combining the rotating speed of the rotary drum and the rotating speed of the input shaft into a rotating speed to be transmitted to the screw conveyor, so that the screw conveyor obtains a continuous and stable differential rotating speed which is slower (or faster) than the rotary drum, and the differential rotating speed is always in a material pushing mode. The rotary drum and the input shaft are respectively driven by the main motor and the auxiliary motor through belt pulleys, and the rotating speed of the rotary drum and the spiral conveyor, namely the differential rotating speed, can be adjusted by changing the running rotating speed of the motors, so that the separation effect is adjusted.

The dryness of the solid matters can be sensed by the spiral pusher in the operation, and the sensing is reflected by the load of the spiral pusher in the operation, namely the torque of the spiral pusher at the time, the torque is the output torque of the differential mechanism and is in direct proportion to the input torque of the differential mechanism, the proportion is the speed ratio of the differential mechanism, and the sensing of the torque is indirectly reflected by the load of the auxiliary motor. Usually, the dryness of the solid matters is stable by adjusting the operation parameters in the operation of the horizontal screw machine, the torque is stable at the moment, the load of the auxiliary motor is observed in the specific operation, and if the load is stable, the dryness of the solid matters discharged by the horizontal screw machine is very stable.

When materials which are high in viscosity and easy to harden are processed, an auxiliary motor is removed, an input shaft of a differential is fixed and does not rotate, the main motor drives a rotary drum to rotate and simultaneously drives a differential shell to rotate, a planet wheel is driven to drive an output shaft to rotate, torque is transmitted to a spiral material pusher according to a fixed proportion relation, solid materials are pushed to a slag outlet of the rotary drum, and continuous separation of the materials by a horizontal screw machine is achieved. However, because the load of the screw feeder cannot be observed without an auxiliary motor, the torque of the screw feeder cannot be judged, and therefore, once the torque exceeds the rated torque of the differential, the differential is damaged, and the material blockage and the damage of the screw horizontal machine are caused.

Disclosure of Invention

The invention aims to provide a torque detection device of a horizontal screw machine and a control method thereof, which aim to solve the problem that the operation efficiency of the machine is influenced due to undefined torque load in the operation process of the horizontal screw machine.

The invention is realized by the following technical scheme: a torque detection device of a horizontal screw machine comprises a machine base, wherein a differential mechanism is arranged between two long cross beams of the machine base, an input shaft of the differential mechanism is fixedly connected with a torque arm through interference fit, and a flat key for transmitting the torque of a screw conveyor is further arranged at the joint of the torque arm and the input shaft; the short cross beam on the outer side of the base is provided with an installation position for installing a lever arm, the lever arm is fixed on the installation position through a pin shaft, and the lever arm can rotate around the pin shaft; install torque sensor on the lever arm, torque sensor comprises torque sensor head and torque sensor pole portion, and the two all is cylindrically, it has the sensor that is used for the induction contact force to inlay in the torque sensor head, and torque sensor pole portion includes a pair of data line that is used for transmitting the moment of torsion.

Furthermore, the lever arm consists of a lever arm body and a connecting part formed by extending upwards along one end of the lever arm body, the lever arm body is rectangular, a mounting hole for fixing a pin shaft is formed in one end of the lever arm body close to the connecting part, and a groove for fixing a limiting device is formed in the lower side of the lever arm body; the connecting part is trapezoidal, the lower bottom edge of the trapezoid is fixedly connected with one end of the lever arm body into a whole, and the upper bottom edge of the trapezoid is connected with an annular part used for accommodating the rod part of the torque sensor. And the limiting devices are pins, and the number of the limiting devices is at least one.

Furthermore, the two pins are respectively arranged at two ends of the lower side of the lever arm body, and limit is carried out on the lever arm in two directions, so that the lever arm is kept at a fixed position and does not rotate.

Furthermore, the pin is welded on a supporting block fixed on the base, and the supporting block is of a cuboid structure and is welded on the side face of the short beam on the outer side of the base.

Furthermore, the head of the torque sensor is in a flat cylinder shape, one end of the torque sensor is provided with a round counter bore, a sensor used for sensing contact force is embedded in the round counter bore, the rod of the torque sensor is in a long cylinder shape and is welded with the head of the torque sensor, and the diameter of the head of the torque sensor is larger than that of the rod of the torque sensor.

Furthermore, the structure of torque arm is the centrosymmetric structure of approximate cuboid shape, and half and the minor face on long limit are 90 contained angles, and half and minor face are 105 contained angles, and two hypotenuses are parallel, and torque arm center is a round hole and opens there is the keyway.

Furthermore, a control box for monitoring the torque sensor is further fixed on the side edge of the supporting block, and a data line penetrates through the control box and is connected with the torque sensor through the data line.

A control method of a torque detection device of a horizontal screw machine comprises the following steps,

step 1, in work, a torque arm is pressed against the head of a torque sensor, when the torque on an input shaft of a differential is increased, namely the torque on the input shaft of the differential exceeds a torque range under normal working conditions, the torque of a spiral conveyor is increased, the contact force on the torque sensor is increased, and meanwhile, the torque is transmitted to a control box for monitoring through a data line led out from the rod part of the torque sensor;

step 2, adjusting the flow of a solid-liquid mixture introduced into the horizontal screw machine through observation and tests, and observing the separation effect of a solid phase and a liquid phase at the same time to obtain an optimal flow and a corresponding optimal torque value; from this, a safe torque range (90% -110% of the optimum torque value) can be determined, and once the torque exceeds this range and reaches the warning value 1 (130% of the optimum torque value), the feed pump is turned off and the differential speed is increased until the torque decreases, the feed pump is turned on after the torque decreases, and if the torque continues to increase to the warning value 2 (150% of the optimum torque value), the horizontal screw machine is turned off and the check is stopped.

Compared with the prior art, the invention has the beneficial effects that: the device can detect and monitor the torque of the spiral material pusher of the single-motor horizontal screw machine in real time, and automatically control the feeding pump and the horizontal screw machine according to the torque, so that the differential mechanism is prevented from being damaged by overlarge torque, and the horizontal screw machine is prevented from being blocked and damaged.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Description of the drawings: 1-differential, 2-base, 3-torque sensor rod part, 4-data line, 5-control box, 6-pin, 7-pin, 8-supporting block, 9-lever arm, 10-pin shaft, 11-torque sensor head part, 12-ring part, 13-torque arm, 14-flat key and 15-input shaft.

Detailed Description

The embodiment provides a torque detection device of a horizontal screw machine and a control method thereof.

Referring to fig. 1, the present invention is a schematic structural view, and includes a torque arm 13, the torque arm 13 is fixedly connected to an input shaft 15 of the differential 1, and transmits the torque of the screw conveyor through a key 14. The lever arm 9 is rotatably mounted on a pin 10 and is restrained in both directions by the pin 6 and the pin 7 so as to be held in a fixed position without rotation, the pin 10 and the pin 6 and the pin 7 being welded to a support block 8 fixed to the frame 2. The torque sensor comprises a torque sensor head part 11 and a torque sensor rod part 3, the torque sensor head part 11 and the torque sensor rod part 3 are cylindrical, the diameter of the torque sensor head part 11 is larger than that of the torque sensor rod part 3, a sensor used for sensing contact force is embedded in the torque sensor head part 11, and the torque sensor rod part 3 comprises a pair of data lines 4 used for transmitting torque. The lever arm 9 is terminated by a circular ring member 12, the circular ring member 12 being adapted to receive the torque sensor stem 3, and in operation the torque arm 13 is pressed against the torque sensor head 11, and when the torque on the differential input shaft 15 increases, i.e. the torque of the screw increases, the contact force on the torque sensor will increase, while the torque is transmitted to the control box 5 via the data line 4 leading from the torque sensor stem 3 for monitoring. Through observation and experiment, can confirm the safe torque range, once the moment of torsion surpasses this scope and reaches early warning value 1, just close the charge pump, increase poor rotational speed simultaneously, reduce until the moment of torsion, open the charge pump again after the moment of torsion descends, if the moment of torsion continues to increase to early warning value 2, just close the spiral shell machine that crouches, shut down the inspection.

The device can carry out real-time detection and control to the moment of torsion of the spiral pusher of the single-motor horizontal screw machine to carry out automatic control to charge pump and horizontal screw machine according to the moment of torsion size, prevent that the moment of torsion is too big to damage differential mechanism and cause the jam of horizontal screw machine and damage.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made to the invention as described and illustrated herein without departing from the scope of the invention as claimed.