RU2541379C2 - Trough vibration measurer of granular feed - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machines for feed preparation. The measurer comprises a frame, a discharge trough with an adjusting valve, a collecting hopper mounted on it on the fixed support. The discharge trough is driven to oscillating motion by three-phase linear asynchronous motor. The secondary element of the three-phase linear asynchronous motor is a spring-loaded rod rigidly connected to the discharge trough and located on the drive side. One winding of the three-phase linear asynchronous motor is connected to the AC mains, and the other two are connected in series and are connected to the output of the single-phase frequency converter which input is connected to the AC mains.

EFFECT: use of the invention enables to improve reliability and performance of operation of the trough vibration measurer of granular feed.

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Description

The invention relates to agricultural machinery for the preparation of feed and is intended for dispensing feed.

Known tray vibration dispenser of bulk feed, including a frame, a discharge tray, which is equipped with an adjustment flap, a storage hopper mounted above it, mounted on a fixed support. Electric motor - an asynchronous rotation motor through a belt drive is connected to a mechanism for converting rotational motion into reciprocating, connected to the discharge chute using a spring-loaded rod rigidly connected to the discharge chute.

The disadvantages of the well-known vibratory feed dispenser for bulk feeds are reduced technical and economic indicators due to the increased weight and size characteristics of the drive (Sabiev U.K. Improving the efficiency of dosing bulk feeds / U.K. Sabiev // Mechanization and electrification of agriculture. - 2011. - № 10. - p.25-26: 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 tray vibratory feed dispenser of bulk feeds).

This goal is achieved by the fact that the tray vibration dispenser of bulk feed containing a frame, an unloading tray, which is equipped with an adjustment flap, a storage hopper mounted above it, mounted on a fixed support, a spring-loaded rod rigidly connected to the unloading tray and located on the drive side, an electric motor, according to the invention is equipped with a single-phase frequency converter, the input of which is connected to an AC network, and the electric motor performs linear translational motion and made in the form of a three-phase linear induction motor, and the secondary element of the three-phase linear asynchronous motor is a spring-loaded rod, rigidly connected to the housing and located on the drive side, while one winding of the three-phase linear asynchronous motor is connected to an AC network, and the other two are connected in series and connected to the output of a single-phase frequency converter.

Due to the fact that the vibratory feed feed dispenser is equipped with a single-phase frequency converter, the input of which is connected to an alternating current network, and the electric motor performs linear translational motion and is made in the form of a three-phase linear asynchronous motor, the secondary element of a three-phase linear asynchronous motor being a spring-loaded rod rigidly connected with a discharge chute and located on the drive side, while one winding of a three-phase linear induction motor is connected Nena to the AC mains, and the other two are connected in series and are connected to a single phase output inverter, an improvement of technical and economic indicators (reduced weight and dimensions, reduces the cost of the drive increases the reliability and productivity of vibrating trough dispenser bulk feed).

Figure 1 presents a diagram of a tray vibration dispenser bulk solids. The invention is illustrated by the scheme shown in figure 1.

The bulk feed vibratory feed dispenser contains a frame 1, an unloading chute 6, which is equipped with an adjustment flap 7, a storage hopper 5 mounted above it, mounted on a fixed support, a spring-loaded rod 4, rigidly connected to the unloading chute and located on the drive side, a single-phase frequency converter 3 the input of which is connected to an alternating current network, a three-phase linear induction motor 2. The secondary element of the three-phase linear asynchronous motor is a spring-loaded rod 4, gesture connected to the discharge chute 6 and located on the drive side. One winding of a three-phase linear induction motor is connected to an AC network, and the other two are connected in series and connected to the output of a single-phase frequency converter 3.

Tray vibration dispenser bulk feed works as follows.

The feed material is poured into the hopper 5, from where it enters the discharge chute 6, equipped with an adjustment flap 7, which is driven by a three-phase linear asynchronous motor 2 and a spring rod 4, rigidly connected to the discharge chute 6 and located on the drive side and which is secondary element of a three-phase linear induction motor 2. When moving under the action of inertia forces arising from the oscillation of the unloading tray 6, bulk feed coming from the hopper 5, move down the discharge chute to the adjusting flap, from where they are brought out. Thus, at the end of the process of dispensing bulk feed, there is a uniform dosage of bulk feed located in the hopper 5.

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:

$$v=2\tau \cdot f_{\mathrm{one}},m/\mathrm{from},(\mathrm{one})$$

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 flow rate of the secondary element of the three-phase linear asynchronous motor required for a given process of dosing, an increase in the quality of dosing and an increase in the performance of the chute vibratory bulk doser feed.

To convert the translational motion of a three-phase linear induction motor into the oscillatory motion of the discharge chute of the vibratory bulk feed dosing unit, one winding of a three-phase linear asynchronous motor is connected directly to the network, and the other two are connected in series and connected to a single-phase frequency converter, the output voltage of which has a frequency different from the frequency network. With this method of switching on a three-phase linear induction motor, a phase shift between the two supply voltages is continuously changing, caused by different periods of supply voltages, which leads to the appearance of an electromagnetic force alternating in time. The frequency of change in the electromagnetic force, and therefore the speed of the secondary element of a three-phase linear induction motor, is determined by the absolute difference in the frequencies of the supply voltages (V. Lukovnikov. Electric oscillatory motion drive. - M.: Energoatomizdat, 1984. - 152 p., Ill .; Mamedov F .A., Bespalov V.Ya., Reznichenko V.Yu., Malinovsky AE Asynchronous motor in the "sinus" mode. - Minsk: Power engineering. No. 5. 1977. - 57 p., Ill.):

$$f_{\mathrm{to}}=\left|f_{\mathrm{one}}-f_2\right|,(2)$$

where f _to - the frequency of the magnitude of the electromagnetic force; f ₁ - frequency of the AC voltage; f ₂ - voltage frequency at the output of a single-phase frequency converter.

From this it follows that it is possible to control the oscillation frequency of the discharge chute of the chute vibration feeder of bulk feed and to obtain such values of the vibration frequencies at which the most intensive dosing of bulk feed is achieved, which, in turn, can significantly improve the quality of dosing and throughput of the chute vibratory feeder bulk feed (Post-harvest seed treatment of grain crops: / VASKHNIL. - M.: Agropromizdat, 1986. - 44 pp., ill. - b / c.). The need to change the oscillation frequency of the discharge tray of the tray vibratory feed dispenser for bulk feeds depends on the type, grade, moisture content of the bulk feeds.

Thanks to the use of a three-phase linear asynchronous motor in the drive of the tray vibratory feed batcher of the bulk feed, the secondary element of which is a spring-loaded rod, rigidly connected to the discharge chute and located on the drive side, the drive of the tray vibration feed batcher of bulk feeds is directly driven. This simplifies the kinematic scheme of the drive, increases the reliability and efficiency, reduces the weight, dimensions and cost of the tray vibratory bulk feed dispenser.

Claims (1)

A vibratory tray dispenser containing a frame, an unloading tray, which is equipped with an adjustment flap, a storage hopper mounted above it, mounted on a fixed support, a spring-loaded rod, rigidly connected to the unloading tray and located on the drive side, an electric motor, characterized in that it is equipped with a single-phase frequency a converter, the input of which is connected to an AC network, and the electric motor performs linear translational motion and is made in the form of a three-phase linear asynchronously motor, the secondary element of a three-phase linear induction motor is a spring-loaded rod rigidly connected to the discharge chute and located on the drive side, while one winding of a three-phase linear asynchronous motor is connected to an AC network, and the other two are connected in series and connected to the output of a single-phase frequency transducer.