RU2504947C1 - Classifier of stem fodder - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: classifier comprises a housing provided with rollers mounted on guides, a set of screens of trapezoidal cross-section in which lower bases rectangular holes are provided, obliquely mounted trapezoidal trays, chute boards, containers for collecting fractionated stem fodder, traction, and drive. The classifier is also provided with two electric motors and a motor control system. The input of the system is connected to a three-phase alternating current network. The electric motors make linear progressive motion and are made in the form of three-phase linear asynchronous motors, at that the secondary element of the motors is the thrust, rigidly connected to the housing and located on the side of the drive. Winding of the three-phase linear asynchronous motors is connected to the output of the motor control system.

EFFECT: improved technical and economic indicators.

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Description

The invention relates to agricultural machinery for the preparation of feed and is intended for the separation of stalk feed into fractions.

A classifier of stalk feeds is known, including a housing equipped with rollers mounted on rails, a set of trapezoidal screens, in the lower bases of which are rectangular openings, obliquely mounted trapezoidal trays, obliquely mounted pitched boards, containers for collecting stalks divided into fractions. An electric motor is an asynchronous rotation motor through a belt drive connected to a mechanism for converting rotational motion into reciprocating, connected to the housing by means of a rod rigidly connected to the housing.

The disadvantages of the known classifier of stalk feeds are reduced technical and economic indicators due to the increased weight and size characteristics of the drive. (GM Cookta. Machines and equipment for the preparation of feed. - M.: Agropromizdat, 1987. - 303 pp., Ill., Pat. 2399346 Russian Federation, IPC C1 A23N 17/00. Classifier of stern feeds [Text] / Mamedov F.A., Litvin V.I., Safonov A.S., Khromov E.V .; applicant and patentee of the Russian State Agrarian Correspondence University - No. 2009108108/13; filed March 10, 2009; published on September 20, 2010, Bull. No. 26. - 7 pp .: ill., Pat. 2400046 Russian Federation, IPC C1 A01D 82/00 Classifier of stalk feeds [Text] / Mamedov F.A., Litvin V.I. , Safonov A.S., Khromov E.V .; applicant and patent holder of the Russian State Agrarian Corresponding University - No. 2009108109/21; filed March 10, 2009; publ. 09/27/10, Bull. No. 27. - 7 pp., ill.).

The aim of the invention is to improve technical and economic indicators (reducing the cost, overall dimensions and mass of the drive, increasing the efficiency, reliability and performance of the classifier of stalk feed).

This goal is achieved in that a classifier of stalk feeds, comprising a housing equipped with rollers mounted on rails, a set of trapezoidal screens, in the lower bases of which are provided rectangular openings, obliquely mounted trapezoidal trays, obliquely mounted pitched boards, containers for collecting stalks divided into fractions feed, draft, rigidly connected to the housing and located on the drive side, according to the invention is equipped with two electric motors, a control system for motors, the input of which is connected to a three-phase AC network, and the electric motors make linear translational movements and are made in the form of three-phase linear asynchronous motors, and the secondary element of three-phase linear asynchronous motors is a rod, rigidly connected to the housing and located on the drive side, while the windings are three-phase linear induction motor connected to the output of the motor control system.

Due to the fact that the stalk feed classifier is equipped with two electric motors, a motor control system, the input of which is connected to a three-phase AC network, and the electric motors perform linear translational motion and are made in the form of three-phase linear asynchronous motors, and the thrust is rigidly a secondary element of three-phase linear asynchronous motors connected to the housing and located on the drive side, while the windings of three-phase linear induction motors are connected to the output of the Starter motor control, there is an improvement of technical and economic indicators (reduced weight and dimensions, reduces the cost of the drive increases the reliability and performance of the classifier stebelnyh feed).

Figure 1 presents a diagram of the classifier of stalk feed. The invention is illustrated by the scheme shown in figure 1.

The stalk feed classifier comprises a housing 1 equipped with rollers 5 mounted on guides 6, a set of sieves 2 of trapezoidal cross-section, in the lower bases of which there are rectangular openings, obliquely mounted trapezoidal trays 3, obliquely mounted pitched boards 4, containers 10 for collecting separated stalk fodder, rod 7, rigidly connected to the housing 1 and located on the drive side, the engine management system 9, the input of which is connected to a three-phase AC network, three-phase linear asynchronous nnye engines 8. The secondary part of three-phase linear induction motors Rod 7 is rigidly connected with the housing 1 and located on the drive side. The windings of three-phase linear asynchronous motors are connected to the output of the motor control system 9. The stalk feed classifier works as follows. The original stalk feed is fed through the upper part of the housing 1 to the upper sieve 2. The housing 1 is equipped with rollers 5 mounted on the guides 6, and driven in oscillation along the guides 6 by three-phase linear induction motors 8 and a rod 7, rigidly connected to the housing 1 and which is secondary element of three-phase linear asynchronous motors 8. The operation of three-phase linear asynchronous motors is controlled by the motor control system 9, periodically supplying and disconnecting power to their windings according to the signal of sensors body position 1. When moving under the influence of inertia arising from the vibration of the body 1, along the screen 2 small stalk feeds through rectangular openings in the screen 2 fall on an inclined pitched board 4, along which they roll into a container 10 to collect stalk separated into fractions . The remaining part of the stalk feed, not divided into fractions, under the action of inertia forces arising from the oscillation of the housing 1, moves to the rear wall of the housing 1 and through the space between the rear wall of the housing 1 and the sieve 2 falls on an inclined trapezoidal tray 3, which rolls onto the next the height of the housing 1 sieve 2 for further separation. This ends the first stage of separation into fractions of stalk feed. Further, the process of separation of stalk feed is repeated several cycles. Thus, upon completion of the full cycle of the process of separation of stalk feed, stalk feeds of different sizes appear in containers 10 for collecting stalk divided into fractions. The smallest feed fraction accumulates in the upper tank 10, and the largest feed fraction in the lower tank 10.

According to the theory of linear induction motors (Fridkin P.A. Gearless arc-driven electric drive. - L.: Energia, 1970; Veselovsky ON, Konyaev A.Yu., Sarapulov F.N. Linear induction motors. - M.: Energoatomizdat, 1991. - 256 p.: Ill.) The speed of the secondary element is determined by the expression:

where τ is the pole division of the motor, m; f ₁ - the frequency of the AC voltage, Hz.

From (1) it follows that, due to the correct choice of the pole division value τ of a three-phase linear induction motor, corresponding to the required for this technological process of separation of the feed speed of the secondary element of a three-phase linear asynchronous motor into fractions of stalk feeds, an increase in the quality of separation and an increase in the performance of the classifier of stalk feed.

To convert the translational motion of three-phase linear induction motors into the oscillatory motion of the classifier of stern feed classifications, the windings of three-phase linear asynchronous motors are connected to the mains through the motor control system. When power is supplied to the winding of one of the three-phase linear induction motors, it moves the draft along with the housing of the classifier of stalk feeds. When the hull reaches the position set by the engine control system by the signal from the position sensor, the engine control system disconnects the specified winding of the three-phase linear induction motor from the network, while the power is supplied to the winding of the second linear asynchronous motor, which moves the body of the classifier of samples of stem feeds in the opposite direction and returns it to initial position, at the same time, a signal to turn off the power of the second engine is received from the sensor of the engine management system power and winding the first three-phase linear induction motor. Further, the indicated cycle of work is repeated (Aipov RS, Oscillating linear electric drive of machines in agricultural production // Mechanization and Electrification of Agriculture. - 2005. No. 11). Thus, the motor control system makes it possible to change the amplitude and frequency of oscillation by adjusting the moment of switching on and off of three-phase linear induction motors.

It follows that it is possible to control the vibration frequency of the body of the classifier of stem feeds and to obtain such values of vibration frequencies at which the most intensive separation of the stern feed into fractions is achieved, which, in turn, can significantly improve the separation quality and throughput of the classifier of stem feeds ( Post-harvest seed treatment of grain crops: / VASKHNIL. - M .: Agropromizdat, 1986. - 44 pp., Ill. - b / c). The need to change the frequency of oscillations of the body classifier of stalk feeds arises depending on the type, variety, moisture content of stalk feeds.

Due to the use of three-phase linear asynchronous motors in the stalk feed classifier drive, the secondary element of which is the thrust rigidly connected to the body and located on the drive side, the stalk feed classifier is directly driven. This simplifies the kinematic scheme of the drive, increases reliability and efficiency, reduces the weight, dimensions and cost of the classifier of stalk feed.

With this design of the stalk feed classifier, its kinematic drive scheme is simplified, weight, dimensions and cost are reduced, reliability, efficiency and productivity are increased.

Claims (1)

A stalk feed classifier comprising a housing provided with rollers mounted on rails, a set of trapezoidal screens, in the lower bases of which are provided rectangular openings, obliquely mounted trapezoidal trays, obliquely mounted pitched boards, containers for collecting stalks divided into fractions, draft, rigidly connected with a housing and located on the drive side, the drive of the stalk feed classifier, characterized in that it is equipped with two electric motors, a control system motors, the input of which is connected to a three-phase AC network, and the electric motors perform linear translational motion and are made in the form of three-phase linear asynchronous motors, and the secondary element of three-phase linear asynchronous motors is a rod rigidly connected to the housing and located on the drive side, while the windings three-phase linear induction motors are connected to the output of the motor control system.

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