CN209481892U - The control mechanism of anti-spinning frame broken yarn - Google Patents

Abstract

The utility model discloses a kind of control mechanisms of anti-spinning frame broken yarn, and comprising AC/DC circuit and several motors, the AC/DC circuit is set as one, and output end is connect with motor described in several simultaneously.The utility model gives the inverter circuit of more frequency converters to provide power supply simultaneously using AC/DC circuit, and when power supply electrifying, more frequency converters power on simultaneously, and corresponding motor starts operation simultaneously；Corresponding motor is all simultaneously stopped when power-off, not will cause broken yarn.

Description

The control mechanism of anti-spinning frame broken yarn

Technical field

The utility model relates to spinning frame technical field, especially a kind of control mechanism of anti-spinning frame broken yarn.

Background technique

Spun yarn production is last procedure of resultant yarn, by carrying out drawing-off and the twisting of decades of times, spinning to rove At the spun yarn that there is certain special number, meet related quality criterion；The quality of quality of spun yarn finally determines the quality of resultant yarn.Weaving Spinning frame is widely used in industry, by rove by drawing-off, twist, be spun into spun yarn.Spinning frame includes intake mechanism, drafting machine Structure, twisting and winding mechanism and coiling and molding mechanism.

Currently, the drafting system of spinning frame that domestic mainstream uses uses three roller shapes of front roller, middle roller and rear roller Formula, wherein middle roller, rear roller are connect by gear with front roller, and front roller is driven by main motor.Traditional spinning frame uses Multiple AC/DC circuits respectively power to main shaft synchronous motor, front roller motor, middle roller motor and rear roller motor, although should Maintenance of equipment convenience, stability under the scheme of kind is high, but volume is big, at high cost, and in the special circumstances such as thunder and lightning or electric network fault Under when leading to spinning frame instant power-down, each motor will not synchronize stopping, be easy to causeing broken yarn phenomenon.And current domestic spinning frame Coiling and molding mostly uses mechanical cam, and bad yarn rate is high, mechanical wear is big, versatility is not strong.

Utility model content

The utility model in view of the deficiencies of the prior art, proposes a kind of control mechanism of anti-spinning frame broken yarn, clever structure, Broken yarn phenomenon occurs when spinning frame being effectively prevent to have a power failure.

In order to realize above-mentioned purpose of utility model, the utility model is the following technical schemes are provided: a kind of anti-spinning frame broken yarn Control mechanism, comprising AC/DC circuit and several motors, the AC/DC circuit is set as one, output end simultaneously with it is several A motor connection.

Further, the input terminal of each motor is respectively connected with frequency converter, and the output end of the AC/DC circuit is simultaneously It is connect with frequency converter described in several.

Further, several described frequency converters include rectifier inverter corresponding with several, the AC/DC The output end of circuit is connected through the rectifier and is connect simultaneously with inverter described in several.

Further, the number of motors is 3 or 4.

Compared with prior art, the utility model has the advantage that using an AC/DC circuit while to more frequency conversions The inverter circuit of device provides power supply, and when power supply electrifying, more frequency converters power on simultaneously, and corresponding motor starts operation simultaneously；It is disconnected Corresponding motor is all simultaneously stopped when electric, not will cause broken yarn.

Since the DC bus of more frequency converters links together, frequency converter in power generation operation state and in electronic Bus energy between the frequency converter of working condition can mutually flow, and so that the voltage of common bus is kept relative stability, system With dynamic braking unit outside not needed when configuring reasonable, achievees the purpose that energy conservation and reduce system cost.

The power grade of more frequency converters is different, and the soft starting circuit of respective inner and precharge time are also different Sample.Timing needs when different capacity grade frequency converter accesses common bus control effectively, and separate unit frequency converter is avoided to access Or frequency converters other on bus normal work is impacted when disengaging common bus system, when more frequency converters power on simultaneously, Preventing bus-charging current from all passing through wherein a certain frequency converter causes the frequency converter rectification circuit to receive impact failure.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the control mechanism of the anti-spinning frame broken yarn of the utility model；

Fig. 2 is another structural schematic diagram of the control mechanism of the anti-spinning frame broken yarn of the utility model；

Diagram label:

1- frequency converter, 11- rectifier, 12- inverter, 2- main shaft synchronous motor, 3- front roller motor, 4- middle roller electricity Machine, 5- rear roller motor, 6- contactor.

Specific embodiment

The utility model is described in detail with reference to the accompanying drawing, the description of this part be only it is exemplary and explanatory, There should not be any restriction effect to the protection scope of the utility model.

A kind of control mechanism of anti-spinning frame broken yarn, comprising AC/DC circuit and several motors, the AC/DC circuit is set It is one, output end is connect with motor described in several simultaneously.

This control mechanism is the input terminal by several motors, connects the same DC bus, reaches control and reaches prominent So difference motor is synchronous when power-off stops, to effectively prevent the generation of broken yarn.

Detailed process is to wind servo driver drives servo motor, drives ring rail to move up and down after The gear deceleration, Replace traditional asynchronous machine and mechanical cam, spun yarn is drawn by recycling round-trip ring rail up and down, is wound up into high-speed rotating On spool, specific molding spool is formed.Electronic lifting machine driving is simple, saves complicated cam, swing arm, ratchet, lifting The mechanical devices such as motor reduce failure rate.Driver is communicated by high-speed bus and PLC.

The input terminal of each motor is respectively connected with frequency converter 1, the output end of the AC/DC circuit simultaneously and several The frequency converter 1 connects, and each frequency converter 1 includes rectifier 11 and inverter 12 in itself.

The direct current common bus scheme of this control mechanism gives the inverter of more frequency converters using an AC/DC circuit simultaneously 12 provide power supplys, and when power supply electrifying, more frequency converters 1 power on simultaneously, and corresponding motor starts operation simultaneously.

As shown in Figure 1, powered using AC/DC circuit, using a Switching Power Supply simultaneously to main shaft synchronous motor 2, The inverter 12 of four frequency converters of front roller motor 3, middle roller motor 4 and rear roller motor 5 is powered, four tunnel of transformer Secondary windings simultaneously powers to the same inverter circuit all the way of every frequency converter per secondary windings all the way.

More specifically, frequency converter 1 is decomposed into two parts, it may be assumed that rectifier 11 and inverter 12, a rectifier 11 supply more inverters 12, and the DC bus parallel connection of every inverter 12 is installed by way of copper bar.

As shown in Fig. 2, being the common bus system formed with 3 different capacity grade frequency converters, 1 control panel relay of frequency converter Device output terminal RA/RC control contactor 6 acts, and every frequency converter bus is connected, and forms reliable and perfect common bus system System.

The advantages of control mechanism of this anti-spinning frame broken yarn are as follows:

1, system power consumption efficiency is high；

2, improve power factor (PF)；

3, mains by harmonics is lower；

4, suitable proportion interlocks many motors control；

5, powered stable.

6, electronic lifting runs smoothly, and reversing impact is small, and Yarn break is few, accurately controls reel for yarn winding layer and bond course Screw pitch is not likely to produce folded yarn phenomenon；

7, cam ratio may be selected in electronic lifting, and cam direction meets different occasion last volume reload requests；

8, good molding curve built in electronic lifting servo improves rolling density, reduces the number that doffs, and saves recruitment.

9, the voltage fluctuation being input on bus on power grid is detected.Busbar voltage declines rapidly when the power break occurs, reaches Complete machine parking order is triggered when setting threshold values.I/O signal, which is powered off, by outside controls complete machine parking.

10, it powers off in docking process, by host wharve inertia feedback electric energy to DC bus, guarantees that busbar voltage can protect It holds in normal range of operation until vehicle stops.

11, PLC still plays control action in docking process.All motor shafts keep synchronizing, and can effectively solve and power on Broken end problem.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and Retouching also should be regarded as the protection scope of the utility model.

Claims (4)

1. a kind of control mechanism of anti-spinning frame broken yarn includes AC/DC circuit and several motors, it is characterised in that: the AC/ DC circuit is set as one, and output end is connect with motor described in several simultaneously.

2. the control mechanism of anti-spinning frame broken yarn as described in claim 1, it is characterised in that: the input terminal of each motor is equal It is connected with frequency converter, the output end of the AC/DC circuit is connect with frequency converter described in several simultaneously.

3. the control mechanism of anti-spinning frame broken yarn as claimed in claim 2, it is characterised in that: several described frequency converters include one A rectifier inverter corresponding with several, the output end of the AC/DC circuit through the rectifier connect simultaneously with it is several A inverter connection.

4. the control mechanism of anti-spinning frame broken yarn as described in claim 1, it is characterised in that: the number of motors is 3 or 4 It is a.