SU1271804A1

SU1271804A1 - Belt conveyer

Info

Publication number: SU1271804A1
Application number: SU853874639A
Authority: SU
Inventors: Эшмурат Тайлакович Душабаев; Юрий Александрович Подопригора
Original assignee: Брянский Ордена "Знак Почета" Институт Транспортного Машиностроения
Priority date: 1985-03-29
Filing date: 1985-03-29
Publication date: 1986-11-23

Abstract

Изобретение относитс к области конвейерного транспорта и позвол ет повысить надежность конвейера (К) в работе. Он содержит концевые барабаны I и 2, резинотросовую ленту (Р/1) 3, установленные под грузовой ветвью конвейера опорные магниты 5 и трансформатор тока (ТТ) 6, первична обмотка 7 которого подключена к источнику переменного тока. Внутри кольцевого сердечика ТТ 6 размешена холоста ветвь РЛ 3. Тросы РЛ 3 соединены между собой последовательно, а концы первого и последнего тросов соединены накоротко. Такое соединение тросов образует основную короткозамкнутую, многовитковую вторичную обмотку ТТ 6, к которой подводитс переменный ток с обоими полупериодамн. т.е. без потерь. На сердечнике 9 выполнена предназначенна дл питани магнитов 5 дополнительна вторична обмотка 8 ТТ 6 с на правлением навивки, противоположным навивке основной обмотки. При подключеиии обмотки 7 к источнику переменного тока в сердечнике 9 возбуждаетс перёмеиноеГ . магнитное поле. В обеих вторичных обмотках возникают переменные ЭДС, наход щие с в противофазе. Это позвол ет умень (Л шить вибрацию РЛ 3. 6 ил. с Ю 00 о 4ibThe invention relates to the field of conveyor transport and improves the reliability of the conveyor (K) in operation. It contains end drums I and 2, rubber cable (P / 1) 3, support magnets 5 installed under the cargo branch of the conveyor and current transformer (CT) 6, the primary winding 7 of which is connected to an alternating current source. Inside the annular core of the TT 6, the single-sided branch of the RL-3 is placed. The cables of the RL-3 are connected in series with each other, and the ends of the first and last cables are short-circuited. Such a connection of the cables forms the main short-circuited, multi-turn secondary winding TT 6, to which an alternating current is supplied with both half periods. those. without loss. On the core 9, there is an additional secondary winding 8 TT 6 for powering the magnets 5 with a winding direction opposite to the winding of the main winding. When the winding 7 is connected to an alternating current source in the core 9, a shift is excited. a magnetic field. In both secondary windings, alternating electromotive forces appear, which are out of phase with. This allows for a decrease (L stitching vibration of the RL 3. 6 ill. From 10 00 about 4ib

Description

Изобретение относится к конвейерному транспорту, а именно к ленточным конвейерам на магнитной опоре.The invention relates to conveyor transport, namely to belt conveyors on a magnetic support.

Целью изобретения является, повышение надежности в работе конвейера путем уменьшения вибрации ленты и повышения ее срока службы.The aim of the invention is to increase the reliability of the conveyor by reducing vibration of the belt and increasing its service life.

На фиг. 1 показан ленточный конвейер, общий вид; на фиг. 2 — схема соединения тросов в месте стыка концов ленты; на фиг. 3 — эквивалентная электрическая схема конвейера; на фиг. 4 — кривые изменения ЭДС в тросах и дополнительной вторичной обмотке трансформатора тока; на фиг.· 5 и 6 — принцип создания подъемной силы.In FIG. 1 shows a conveyor belt, a general view; in FIG. 2 - connection diagram of cables at the junction of the ends of the tape; in FIG. 3 - equivalent electrical circuit of the conveyor; in FIG. 4 - EMF change curves in cables and an additional secondary winding of a current transformer; in Fig. 5 and 6 - the principle of creating a lifting force.

Ленточный конвейер состоит из концевых барабанов I и 2, грузонесущей резинотросовой ленты 3 с тросами 4, опорных электромагнитов 5 и трансформатора 6. Трансформатор 6 включает в себя первичную обмотку 7, дополнительную вторичную обмотку 8, которая предназначена для питания опорных электромагнитов 5 и кольцеобразный сердечник 9, внутри которого размещена холостая ветвь грузонесущей резинотросовой ленты 3. Тросы 4 грузонесущей резинотросовой ленты 3 в месте стыка концов ее соединены между собой последовательно, а оставшиеся свободные концы крайних тросов соединены между собой накоротко посредством изолированного соединительного провода 10, образуя замкнутую многовитковую вторичную обмотку II трансформатора 6. При этом дополнительная обмотка 8 намотана на кольцеобразном сердечнике 9 с направлением навивки, противоположным к направлению навивки замкнутой тросовой обмотки 11 (фиг. 3).The belt conveyor consists of end drums I and 2, a load-carrying rubber cable belt 3 with cables 4, supporting electromagnets 5 and a transformer 6. The transformer 6 includes a primary winding 7, an additional secondary winding 8, which is designed to power the supporting electromagnets 5 and an annular core 9 , inside of which there is a single branch of a load-bearing rubber-cable tape 3. Cables 4 of a load-bearing rubber-cable tape 3 at the junction of its ends are connected together in series, and the remaining free ends of the edge these cables are interconnected by means of short-circuited insulated connecting wire 10, forming a closed multi-turn secondary winding of transformer 6. II The additional winding 8 is wound on the annular core 9 with the winding direction opposite to the direction of winding of the closed winding rope 11 (FIG. 3).

На фиг. 3 показана эквивалентная схема питания грузонесущей резинотросовой ленты 3 и опорных электромагнитов, где.Ктр— сопротивление тросов ленты и Цэм сопротивление обмоток электромагнитов.In FIG. Figure 3 shows the equivalent power supply circuit for a load-carrying rubber-cord tape 3 and reference electromagnets, where Ktr is the resistance of the tape cables and Tsem the resistance of the electromagnet windings.

На фиг. 4 изображены кривые изменения ЭДС U (t), где 1 — в тросах и 2 — в дополнительной обмотке.In FIG. Figure 4 shows the EMF variation curves U (t), where 1 is in the cables and 2 is in the additional winding.

На фиг. 5 и 6 показан принцип создания подъемной силы F, где направление тока, перпендикулярное плоскости чертежа, показано знаком @ при направлении тока от нас и знаком 0 при направлении тока к нам.In FIG. Figures 5 and 6 show the principle of creating a lifting force F, where the direction of the current perpendicular to the plane of the drawing is shown by the @ sign for the direction of the current from us and the sign 0 for the direction of the current to us.

Конвейер работает следующим образом.The conveyor works as follows.

При подключении первичной обмотки 7 трансформатора 6 к источнику переменного тока в кольцеобразном сердечнике 9 возбуждается переменное магнитное поле, в результате чего во вторичных обмотках 8 и 11 возникают переменные ЭДС. Так как направления навивки этих обмоток противополож ны друг к другу (фиг. 3), то переменные ЭДС во вторичных обмотках 8 и 11 находятся в постоянной противофазе друг с другом (фиг. 4), т.е. разность фаз этих ЭДС равна Δφ=π, где л=180° — полупериод гармони⁵ ческого колебания переменной ЭДС источника тока.When the primary winding 7 of the transformer 6 is connected to an alternating current source, an alternating magnetic field is excited in the annular core 9, as a result of which variable emfs appear in the secondary windings 8 and 11. Since the winding directions of these windings are opposite to each other (Fig. 3), the EMF variables in the secondary windings 8 and 11 are in constant antiphase with each other (Fig. 4), i.e. phase difference of the EMF is Δφ = π, where l = 180 ° - ⁵ Cesky half harmonic oscillations EMF variable current source.

Рассмотрим процессы взаимодействия магнитного поля опорного электромагнита и троса с током в обоих полупериодах пеЮ ременного тока. В первом полупериоде, т.е. при положительном знаке ЭДС в дополнительной обмотке (фиг. 4) ток по тросу направлен перпендикулярно к плоскости чертежа (от нас), а магнитный поток опорного . электромагнита направлен справа налево 15 (фиг. 5а). По правилу «левой руки» в этом случае на трос с током действует электромагнитная сила, направленная вверх. Во втором полупериоде, т.е. при отрицательном знаке ЭДС в тросах и положительном знаке ЭДС в дополнительной обмотке (фиг. 4) ток во тросу направлен перпендикулярно к плоскости чертежа (к нам), а магнитный поток опорного электромагнита направлен слева направо (фиг. 6). Правило «левой руки» в этом случае также показы25 вает, что на трос с током действует электромагнитная сила, направленная вверх.Let us consider the processes of interaction of the magnetic field of the reference electromagnet and the cable with current in both half periods of alternating current. In the first half-cycle, i.e. with a positive sign of the EMF in the additional winding (Fig. 4), the current along the cable is directed perpendicular to the plane of the drawing (from us), and the magnetic flux is reference. the electromagnet is directed from right to left 15 (Fig. 5a). According to the rule of the "left hand" in this case, an electromagnetic force directed upward acts on the cable with current. In the second half-cycle, i.e. with a negative EMF sign in the cables and a positive EMF sign in the additional winding (Fig. 4), the current in the cable is directed perpendicular to the plane of the drawing (towards us), and the magnetic flux of the reference electromagnet is directed from left to right (Fig. 6). The rule of the “left hand” in this case also shows that an upward electromagnetic force acts on the cable with current.

Таким образом, создание подъемной силы в обоих полупериодах позволяет максимально использовать мощность трансформатора, повысить его КПД, а постоянное од30 ненаправленное (вверх) взаимодействие тросов с током и магнитного пойя опорных электромагнитов уменьшает вибрацию грузонесушей ленты.Thus, the creation of a lifting force in both half-periods allows maximum use of the transformer power, increasing its efficiency, and the constant unidirectional (upward) interaction of the cables with the current and the magnetic singing of the supporting electromagnets reduces the vibration of the load-carrying tape.

Claims

The invention relates to a conveyor transport, namely to a belt conveyor on a magnetic support. The aim of the invention is to increase the reliability of the conveyor by minimizing the vibration of the belt and increasing its service life. FIG. I shows the belt conveyor, general view; in fig. 2 is a diagram of connecting the cables at the junction of the ends of the tape; in fig. 3 - equivalent electrical circuit of the conveyor; in fig. 4 shows the EMF variation curves in the cables and the additional secondary winding of the current transformer; Figures 5 and 6 show the principle of creating a lift. The belt conveyor consists of end drums I and 2, a load-carrying rubber cable 3 with cables 4, reference electromagnets 5 and a transformer 6. Transformer b includes a primary winding 7, an additional secondary winding 8 that is designed to power the reference electromagnets 5 and an annular core 9 inside which is placed a single branch of the load-carrying rubber cable of the etched tape 3. The cables 4 of the load-carrying rubber cable 3 at the junction of its ends are connected to each other in series, and the remaining free ends The outermost cables are interconnected by means of insulated connecting wire 10, forming a closed multi-turn secondary winding 11 of a transformer 6. At the same time, additional winding 8 is wound on an annular core 9 with a winding direction opposite to the direction of iAB. IVAN of a closed cable winding 11 (Fig. 3 ). FIG. 3 shows the equivalent power supply circuit of the load-carrying rubber cable 3 and the reference electromagnets. Ptr is the resistance of the cables of the tape and Rr, the resistance of the windings of the electromagnets. FIG. 4 shows the EMF and (t) change curves, where 1 is in the cables and 2 is in the additional winding. FIG. 5 and 6 illustrate the principle of creating a lift force F, where the direction of the current is perpendicular to the plane of the drawing. shown by y) with the direction of the current from us and 0 with the direction of the current towards us. The conveyor works as follows. When the primary winding 7 of the transformer 6 is connected to an alternating current source, an alternating magnetic field is excited in the ring-shaped core 9, as a result of which a variable EMF is generated in the secondary windings 8 and 11. Since the windings of the windings of these windings are opposite to each other (Fig. 3), the variable EMF in the secondary windings 8 and I are in constant antiphase with each other (Fig. 4), i.e. The phase difference of these EMFs is D (where is the half-period of harmonic oscillation of the alternating current-voltage EMF. Consider the processes of interaction between the magnetic field of the reference electromagnet and the cable with the current in both half-periods of alternating current. In the first half-period, i.e. with a positive sign (Fig. 4) the current along the cable is directed perpendicular to the plane of the drawing (from us), and the magnetic flux of the reference electromagnet is directed from right to left (Fig. 5a). According to the "left hand rule, an electromagnet acts on the cable in this case It is the upward directed force.In the second half-period, i.e. with a negative EMF sign in the cables and a positive EMF sign in the additional winding (Fig. 4), the cable current is directed perpendicular to the drawing plane (to us), and the magnetic flux is reference The electromagnet is directed from left to right (Fig. 6). The “left-hand” rule in this case also shows that an electromagnetic force acts upward on the cable with current. Thus, creating a lifting force in both half-periods allows maximum use of the transformer power. , Improve its efficiency, and the constant unidirectional (upward) reacting with cables for current and magnetic) bearing one of the electromagnets reduces vibration gruzonesushey tape. Claims of the invention Conveyor belt containing end drums, rubber cable, supporting magnets installed under the cargo branch of the conveyor, and a transformer, the primary winding of which is connected to an AC source, and inside the core there is a rubber cable branch that is connected in series with each other and form The secondary winding of the transformer, characterized in that, in order to increase the reliability in operation, an additional secondary volt is made on the core of the transformer TCA, connection to the reference magnets, and the ends of the first and last ribbon cables connected circuited, the direction of winding of additional secondary windings of the trans (}) ormatora opposite coiling main secondary winding of the transformer.

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