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Three-motor common-drive spiral tower system of spiral freezer

A technology of electric motor and freezer, which is applied in the direction of AC motor control, speed regulation of multiple motors, control system, etc., can solve the problems of not being a very stable rigid body, the collapse of the spiral tower, etc., and achieve improved reliability, simple structure and automatic control. Effect

Active Publication Date: 2009-12-23
SIFANG TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing stacking spiral freezer is not a very stable rigid body because the spiral tower is self-stacked and stacked by the conveyor belt. , the uncoordinated driving torque will easily lead to the collapse of the spiral tower. Therefore, in addition to the higher quality requirements for the motor and electrical components, the spiral freezer is also equipped with more electrical and mechanical detection and feedback systems, and strict safety regulations are formulated. Protection software, there are a large number of alarms and warning signs in the operation site and operation manual, which are used to improve the reliability of the operation of the spiral tower and to deal with the failure of the spiral tower in time. Therefore, the reliability of the three-motor co-driven spiral tower system is the most important important

Method used

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  • Three-motor common-drive spiral tower system of spiral freezer
  • Three-motor common-drive spiral tower system of spiral freezer
  • Three-motor common-drive spiral tower system of spiral freezer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The main wiring diagram of the three-motor co-drive spiral tower of a kind of spiral freezer (see figure 1 ), the main drive electric reducer adopts a three-phase asynchronous motor 1 with a nameplate rated voltage of 380V, a frequency of 50Hz, and a power of 5.5kW for △ connection; Phase asynchronous motor 2, variable △ connection to Y connection; tension electric reducer adopts three-phase asynchronous motor 3 with nameplate calibrated voltage 460V, frequency 60Hz, power 0.75kW, Y connection. The three motors are connected in parallel to the output end of a 380V three-phase AC variable frequency power supply 4 . Among them, the three-phase asynchronous motor 1 driven by the main drive is in a normal working condition, and the three-phase asynchronous motor 2 driven by the auxiliary drive reduces the output torque and stall torque of the motor by reducing the operating voltage of the winding coil, and coordinates with almost stall torque The three-phase asynchronous m...

Embodiment 2

[0018] The difference with embodiment 1 is: according to several typical three-phase asynchronous motor torque characteristic curves (see figure 2 ), the high-slip three-phase asynchronous motor with a characteristic curve of 6 has softer mechanical characteristics than the general-purpose three-phase asynchronous motor with a characteristic curve of 5; according to the function of the mechanical characteristics of the three-phase asynchronous motor n=f(M) The graph and the influence graph of the rotor resistance R on the mechanical characteristics of the three-phase asynchronous motor (see image 3 , Figure 5 ), the increase in rotor resistance (R 1 increase to R 2 ) to soften the mechanical characteristics of the three-phase asynchronous motor, therefore, the auxiliary drive three-phase asynchronous motor 2 selects a high-slip three-phase asynchronous motor.

Embodiment 3

[0020] The difference from Embodiment 1 is that the tensioned three-phase asynchronous motor 3 selects a high-slip three-phase asynchronous motor.

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Abstract

The invention relates to a three-motor common-drive spiral tower system of a spiral freezer. A main-drive three-phase asynchronous motor is in triangular connection, an auxiliary-drive three-phase asynchronous motor changes the triangular connection into Y connection, the nameplate nominal voltage of a tension three-phase asynchronous motor is higher than the nameplate nominal voltage of the main-drive three-phase asynchronous motor, and the main-drive three-phase asynchronous motor, the auxiliary-drive three-phase asynchronous motor and the tension three-phase asynchronous motor are connected to the output end of a three-phase AC variable-frequency power source in parallel. The three-motor common-drive spiral tower system of a spiral freezer has simple structure and simple automation control and can further improve the reliability of a driving system so as to achieve the high requirement on zero-fault risk of the three-motor common-drive system.

Description

Technical field: [0001] The invention relates to a spiral tower system jointly driven by three motors of a spiral freezer. Background technique: [0002] The stacking spiral freezer manufactured according to the existing patent ZL87105319 uses two sets of circular guide rail frames and two sets of circulating ball ring chains that are basically coaxially fixed and installed in the freezer. The spiral tower is rotated by stacking stacked conveyor belts. The ring chain drive motor that carries the weight of the outer circumference of the spiral tower and drives the rotation is the main drive motor, and the ring chain drive motor that carries the weight of the inner circumference of the spiral tower and drives the rotation is the auxiliary drive motor. , the uppermost layer of the spiral tower is stacked with a tensioning motor at the discharge port to pull it out, then it passes through the return guide rail to the feed port, and enters the bottom of the spiral tower through t...

Claims

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Application Information

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IPC IPC(8): H02P5/46H02P25/16
Inventor 孙锦明周鸣惠杨晓燕
Owner SIFANG TECH GRP CO LTD