CN201386166Y - Cotton spinning draw frame with stepless speed regulation - Google Patents

Abstract

The utility model discloses a cotton spinning drawing machine without level-difference speed regulation, relates to the technology field of textile machinery and in particular to the speed ratio adjustment technology of a drafting system of a cotton spinning drawing machine. A roller of each roller group is concentrically connected to a passive belt wheel respectively, each passive belt wheel is respectively connected to a driving belt wheel by a leather belt in a transmission way, and three driving belts are respectively connected to the output ends of three groups of servo motors; one of front rollers is concentrically connected to the passive belt wheel which is connected with the driving belt wheel by a driving belt, the driving belt wheel is connected to the output end of a main variable frequency motor. The machine realizes drafting ratio speed regulation without level difference and ensures the accuracy of drafting ratio and driving stationarity, meanwhile, solves the problems that the main drafting ratio is unstable and the roller winding is easy to deform and crack owning to unstable power frequency caused by roller direct-type frequency-conversion speed regulation without replacing mechanical parts and ensures the drafting system to have constant speed ratio and realizes speed regulation without level difference.

Description

Cotton spinning draw frame with stepless speed regulation

technical field

The utility model relates to the technical field of textile machinery, in particular to the adjustment technology of the speed ratio of the drafting system of a cotton spinning drawing frame.

Background technique

In the roller speed ratio adjustment system of the cotton spinning draw frame, gears or pulleys are generally used for adjustment. Since the number of teeth can only be an integer, the difference in the speed ratio adjustment can only be achieved by using different gears in actual production. Make up the number of gears or pulleys to solve. Thereby influence strip dry quality and quantification of strip, and operation is extremely inconvenient. However, the method of directly connecting the variable frequency motor to the roller drive to change the draft ratio can realize stepless speed regulation, but the draft ratio is inaccurate due to power fluctuations, and self-fine-tuning cannot be realized, and there are deformation and failure of the roller due to winding. possibility of breakage.

Utility model content

The purpose of the utility model is to design a stepless speed regulation cotton spinning draw frame which is convenient to adjust and guarantee the draw frame quality.

The utility model includes a drafting mechanism and a bar guide mechanism, and the drafting mechanism includes three sets of rollers and a pair of front pressing rollers. It is characterized in that one of the rollers in each group is concentrically connected to the passive pulley, although each passive pulley is connected to a driving pulley through a belt, and the three driving pulleys are respectively connected to the output of the three sets of servo motors. end; one of the front pressure rollers is concentrically connected to a driven pulley, and the driven pulley is connected to a driving pulley through a transmission belt, and the driving pulley is connected to the output end of the main frequency conversion motor.

The above three groups of rollers can adjust their respective rotation speeds through three sets of servo motors. The servo motors and the rollers are driven synchronously and flexibly without gaps between the rollers, while the pressure rollers adopt frequency conversion speed regulation. The utility model overcomes the shortcomings of the current technology, adopts the speed regulation method based on the combination of frequency conversion speed regulation technology and servo technology to solve the problem of stepless speed regulation of draw frame speed regulation, realizes stepless draft ratio speed regulation, and ensures It not only ensures the readiness of the draft ratio, but also ensures the smoothness of the transmission. Due to the introduction of the servo motor, the change of its speed can be directly set according to the actual needs through the man-machine dialogue system, and can realize automatic fine-tuning after detection by the encoder. There is no need to replace mechanical parts, and at the same time, it has changed the problem that the main draft ratio is unstable due to the unstable power frequency of the roller direct type frequency conversion speed regulation, and the roller winding is easy to deform and break. It ensures the constant speed ratio of the drafting system and realizes stepless speed regulation.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

Detailed ways

As shown in Figure 1, the utility model is mainly made up of drafting mechanism 2 and bar guide mechanism 3.

The drafting mechanism 1 includes three sets of rollers 22, 23, 24 and a pair of front pressing rollers 21.

One of each group of rollers is concentrically connected to the driven pulley 26 respectively, although each driven pulley 26 points is connected with a drive pulley 25 through a belt, and the three drive pulleys 25 are respectively connected to three groups of servo motors 6,7 , 8 output terminals.

One of the front pressure rollers 21 is concentrically connected with a driven pulley 24, and the driven pulley 28 is connected with a driving pulley 27 by a drive belt, and the driving pulley 27 is connected to the output end of the main variable frequency motor 5.

Among the figure, 1 is a man-machine interface console, 4 is a can, and 9 is a program controller.

Claims (1)

1. Cotton spinning drawing frame with stepless speed regulation, including drafting mechanism and sliver guide mechanism. The drafting mechanism includes three sets of rollers and a pair of front pressure rollers, and it is characterized in that one of each set of rollers is connected concentrically Passive pulleys, although each passive pulley is connected to a driving pulley through a belt, the three driving pulleys are respectively connected to the output ends of three sets of servo motors; one of the front pressure rollers is connected concentrically A driven pulley, the driven pulley is connected to a driving pulley through a transmission belt, and the driving pulley is connected to the output end of the main frequency conversion motor.