CN115051621A - Control method of electric control system of speed reducing device - Google Patents

Control method of electric control system of speed reducing device Download PDF

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Publication number
CN115051621A
CN115051621A CN202111327574.6A CN202111327574A CN115051621A CN 115051621 A CN115051621 A CN 115051621A CN 202111327574 A CN202111327574 A CN 202111327574A CN 115051621 A CN115051621 A CN 115051621A
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contact
relay
closed
normally closed
point
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Inventor
杜春江
李国昌
马倩云
林云志
韦英举
吴天安
邓旭毅
陈嘉庆
王良伟
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South China Marine Machinery Co Ltd
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South China Marine Machinery Co Ltd
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Priority to CN202111327574.6A priority Critical patent/CN115051621A/en
Publication of CN115051621A publication Critical patent/CN115051621A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

The invention provides a control method of an electric control system of a speed reducing device; the electric control system comprises a main circuit, a control circuit and a speed reducing circuit; the main circuit and the speed reducing circuit are respectively connected with the control circuit through signals; the speed of the crane is controlled by controlling the forward and backward movement of the travelling mechanism of the crane; when the travelling mechanism moves to a forward speed reduction point or a backward speed reduction point, the travelling mechanism is switched to low-speed movement; reducing the speed of the travelling mechanism; the problem that the traveling mechanism cannot be limited by the forward limiting point or the backward limiting point when the traveling mechanism moves at a high speed is avoided.

Description

Control method of electric control system of speed reducing device
Technical Field
The invention relates to the field of cranes, in particular to a control method of an electric control system of a speed reducer.
Background
The traveling mechanism of the crane is generally provided with a limit switch, and when the traveling mechanism reaches the front limit and the rear limit, the power supply of the lifting mechanism can be automatically cut off, so that the lifting motor stops running. However, as the hoisting mechanism adopts a double-speed motor or adopts frequency conversion to realize more and more double-speed application, the parking inertia is larger at high speed, only two limits are provided, and the travelling mechanism cannot be effectively limited.
In Chinese application No. CN 201320439388.6; the announcement day is: 2013.12.25, respectively; the patent document discloses a hoisting mechanism control circuit and a crane; the system comprises a stop control branch and a two-speed switching control branch, wherein a safety pre-limit switch is connected in series on the two-speed switching control branch, and the safety pre-limit switch is connected in parallel with a normally open auxiliary contact of a descending contactor; and the stop control branch is connected with a terminal safety limit switch in series, and the terminal safety limit switch is connected with a normally closed auxiliary contact of the ascending contactor in parallel.
In the control circuit, however, a safety pre-limiting point is only arranged on the lifting line of the lifting hook; the circuit can only control the speed of the lifting hook when the lifting hook rises; it can only achieve speed control in one direction; speed control in both directions cannot be achieved.
Disclosure of Invention
The invention provides a control method of an electric control system of a speed reducer, which controls the speed of a traveling mechanism of a crane by advancing and retreating; when the travelling mechanism moves to a forward speed reduction point or a backward speed reduction point, the travelling mechanism is switched to low-speed movement; reducing the speed of the travelling mechanism; the problem that the traveling mechanism cannot be limited by the forward limiting point or the backward limiting point when the traveling mechanism moves at a high speed is avoided.
In order to achieve the purpose, the technical scheme of the invention is as follows: a control method of an electric control system of a speed reducing device; the electric control system comprises a main circuit, a control circuit and a speed reducing circuit; the main circuit and the speed reducing circuit are respectively connected with the control circuit through signals.
The main circuit comprises a contact 3KM1.1, a contact 3KM2.1, a contact 3KM3.1, a contact 3KM4.1 and a motor; contact 3KM1.1 is connected to a first power source, and contact 3KM3.1 is connected to contact 3KM 1.1; the motor is connected with a contact 3KM 3.1; contact 3KM2.1 is connected in parallel with contact 3KM 1.1; one end of the contact 3KM4.1 is connected with the contact 3KM 1.1; the other end of the contact 3KM4.1 is connected with a motor.
The speed reducing circuit is connected with the second power supply; the device comprises a normally closed limit travel switch ST6, a relay 3K2, a normally closed limit travel switch ST7, a relay 3K3, a speed reduction travel switch ST8 and a relay 3K 4; the normally closed limit travel switch ST6 is connected with a relay 3K 2; the normally closed limit travel switch ST7 is connected with the relay; the deceleration travel switch ST8 is connected to the relay 3K4.
The control circuit comprises a manual double-contact switch SB5, a normally closed contact 3K6.1, a relay 3K5, a relay 3K6, a manual double-contact switch SB6, a relay 3K7, a normally closed contact 3K7.1, a relay 3K8, a contact 3K4.1, a contact 3K2.1, a relay 3KM3, a contact 3K5.1, a contact 3K8.1, a contact 3K3.1, a contact 3K6.2, a contact 3K2.2, a normally closed contact 3K4.2, a relay 3KM4, a contact 3K7.2, a contact 3K3.2, a contact 3K5.2, a contact 3K2.3, a normally closed contact 3KM2.2, a relay 3KM1, a contact 3K6.3, a contact 3K7.3, a contact 3K3, a normally closed contact 3KM1.2, a relay 3KM2 and a contact 3K 8.1.
The SB5.1 end of the manual double-contact switch SB5 is connected with the normally closed contact 3K 6.1; the normally closed contact 3K6.1 is connected with a relay 3K 5; the SB5.2 end of the manual double-contact switch SB5 is connected with the relay 3K 6; the SB6.2 end of the manual double-contact switch SB6 is connected with the relay 3K 7; the SB6.1 end of the manual double-contact switch SB6 is connected with the normally closed contact 3K 7.1; the normally closed contact 3K7.1 is connected to a relay 3K8.
Contact 3K4.1 is connected to contact 3K2.1, and contact 3K2.1 is connected to relay 3KM 3; the contact 3K8.1 is connected with the contact 3K 3.1; contact 3K5.1 is connected in parallel with contact 3K 4.1; the contacts 3K8.1 and 3K3.1 are connected in parallel with the contacts 3K4.1 and 3K 2.1.
The contact 3K6.2 is connected with the contact 3K2.2, the contact 3K2.2 is connected with the normally closed contact 3K4.2, and the normally closed contact 3K4.2 is connected with the relay 3KM 4; contact 3K7.2 is connected to contact 3K 3.2; the contact 3K7.2 and the contact 3K3.2 are connected with the contact 3K6.2 and the contact 3K2.2 in parallel;
the contact 3K5.2 is connected with the contact 3K2.3, the contact 3K2.3 is connected with the normally closed contact 3KM2.2, and the normally closed contact 3KM2.2 is connected with the relay 3KM 1; contact 3K6.3 is connected in parallel with contact 3K 5.2.
Contact 3K7.3 contact 3K3.3 is connected, contact 3K3.3 is connected with normally closed contact 3KM1.2, normally closed contact 3KM1.2 is connected with relay 3KM2, and contact 3K8.1 is connected in parallel with contact 3K 7.2.
A control method of the electric control system; the method comprises the following steps:
(1) presetting a forward limit point, a forward deceleration point, a backward deceleration point and a backward limit point; the forward speed reduction point is positioned between the forward limit point and the backward limit point; the backward speed reducing point is positioned between the forward speed reducing point and the backward limiting point; collision blocks are arranged on the forward limiting point, the forward deceleration point, the backward deceleration point and the backward limiting point; the traveling mechanism is provided with a normally closed limit travel switch ST6, a normally closed limit travel switch ST7 and a deceleration travel switch ST 8.
(2) If the traveling mechanism is controlled to advance, the step (3) is carried out; and (6) if the traveling mechanism is controlled to retreat.
(3) The SB5.2 end of the manual double-contact switch SB5 is closed; the relay 3K6 is powered; contact 3K6.2 and contact 3K6.3 are closed; the relay 3KM4 and the relay 3KM1 are electrified; contact 3KM4.1 and contact 3KM1.1 are closed; the motor drives the traveling mechanism to advance at high speed.
(4) After the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the advancing limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected, and the relay 3KM4 loses power; the contact 3K4.1 is closed, and the relay 3KM3 is electrified; the contact 3KM3.1 is closed; the contact 3KM4.1 is disconnected; the traveling mechanism is switched to low-speed advance.
(5) After a normally closed limit travel switch ST6 of the traveling mechanism collides with a collision block of an advancing limit point; the normally closed limit travel switch ST6 is turned off; the relay 3K2 loses power, and the contact 3K2.1, the contact 3K2.2 and the contact 3K2.3 are disconnected; the contact 3KM1.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops advancing.
(6) The SB6.2 end of the manual double-contact switch SB6 is closed; the relay 3K7 is powered; simultaneously, the contact 3K7.2 and the contact 3K7.3 are closed; the relay 3KM4 and the relay 3KM2 are powered; contact 3KM4.1 and contact 3KM2.1 are closed; the motor drives the traveling mechanism to retreat at a high speed.
(7) After the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the rear limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; the relay 3KM4 loses power; contact 3K4.1 is closed; the relay 3KM3 is electrified; the contact 3KM3.1 is closed; contact 3KM4.1 is open; the traveling mechanism is switched to low-speed backward.
(8) When the normally closed limit travel switch ST7 of the traveling mechanism collides with the collision block of the backward limit point; the normally closed limit travel switch ST7 is off; the relay 3K3 loses power, and the contact 3K3.1, the contact 3K3.2 and the contact 3K3.3 are disconnected; the contact 3KM2.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops moving backward.
The above method; an advancing limiting point is arranged at one end along the advancing direction of the walking mechanism; a backward limiting point is arranged at one end of the backward direction of the walking mechanism; a forward deceleration point and a backward deceleration point are arranged between the forward limit point and the backward limit point; the forward deceleration point is arranged close to the forward limit point; the backward deceleration point is arranged close to the backward limit point; collision blocks are arranged on the forward limiting point, the forward deceleration point, the backward deceleration point and the backward limiting point; the forward speed reducing point and the backward speed reducing point are used for controlling the travelling mechanism to reduce speed after being contacted with a speed reducing travel switch ST 8; the forward limit point is used for controlling the running mechanism to stop after being contacted with a normally closed limit travel switch ST 6; the backward limit point is used for controlling the running mechanism to stop after being contacted with a normally closed limit travel switch ST 7.
When the normally closed limit travel switch ST6 is not contacted with the collision block of the forward limit point, the relay 3K2 is electrified; contact 3K2.2, contact 3K2.1 and contact 3K2.3 are closed. When the normally closed limit travel switch ST7 is not contacted with the collision block of the backward limit point, the relay 3K3 is electrified; contact 3K3.1, contact 3K3.2 and contact 3K3.3 are closed. The speed of the travelling mechanism is controlled to advance and retreat; when the travelling mechanism moves to a forward speed reduction point or a backward speed reduction point, the travelling mechanism is switched to low-speed movement; reducing the speed of the travelling mechanism; the problem that the traveling mechanism cannot be limited by the forward limiting point or the backward limiting point when the traveling mechanism moves at a high speed is avoided.
Further, step (5) is followed by steps (5.1) - (5.5).
And (5.1) if the travelling mechanism at the forward limit point is controlled to retreat, performing the step (5.2).
(5.2) the SB6.2 end of the manual two-contact switch SB6 is closed; the relay 3K7 is powered; contact 3K7.2 and contact 3K7.3 are closed; at the moment, as the speed reduction travel switch ST8 is closed, the normally closed contact 3K4.2 is opened, and the contact 3K4.1 is closed; the relay 3KM3 and the relay 3KM2 are powered; the traveling mechanism is retreated at a low speed.
(5.3) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of an advancing limiting point; the deceleration stroke switch ST8 is off; the relay 3K4 loses power; the normally closed contact 3K4.2 is closed; the contact 3K4.1 is disconnected; the relay 3KM4 is powered on, and the relay 3KM3 is disconnected; the traveling mechanism is switched to high-speed backward movement.
(5.4) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of a rear limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; contact 3K4.1 is closed; the relay 3KM4 is switched off, and the relay 3KM3 is powered; the traveling mechanism is switched to low-speed backward movement.
(5.5) after the normally closed limit travel switch ST7 of the traveling mechanism collides with the collision block of the backward limit point 9; the normally closed limit travel switch ST7 is off; the relay 3K3 loses power, and the contact 3K3.1, the contact 3K3.2 and the contact 3K3.3 are disconnected; the contact 3KM2.1 is disconnected with the contact 3KM3.1, and the motor stops acting; the traveling mechanism stops moving backward.
By the method, the travelling mechanism can be controlled to move at a high speed between the forward speed reducing point and the backward speed reducing point; the traveling mechanism can also be controlled to move at low speed between the forward decelerating point and the forward limiting point and between the backward decelerating point and the backward limiting point.
Further, step (8) is followed by steps (8.1) - (8.5).
And (8.1) if the traveling mechanism at the backward movement limiting point is controlled to advance, performing the step (8.2).
(8.2) the SB5.2 end of the manual two-contact switch SB5 is closed; the relay 3K6 is powered; contact 3K6.2 and contact 3K6.3 are closed; at the moment, as the speed reduction travel switch ST8 is closed, the normally closed contact 3K4.2 is opened, and the contact 3K4.1 is closed; the relay 3KM3 and the relay 3KM1 are powered; the traveling mechanism advances at a low speed.
(8.3) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of a backward limit point; the deceleration stroke switch ST8 is off; the relay 3K4 loses power; the normally closed contact 3K4.2 is closed; the contact 3K4.1 is disconnected; the relay 3KM4 is powered on, and the relay 3KM3 is disconnected; the traveling mechanism is switched to high-speed travel.
(8.4) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of an advancing limiting point; the deceleration travel switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; contact 3K4.1 is closed; the relay 3KM4 is switched off, and the relay 3KM3 is powered; the traveling mechanism is switched to low-speed forward.
(8.5) after a normally closed limit travel switch ST6 of the traveling mechanism collides with a collision block of an advancing limit point; the normally closed limit travel switch ST6 is turned off; the relay 3K2 loses power, and the contact 3K2.1, the contact 3K2.2 and the contact 3K2.3 are disconnected; the contact 3KM1.1 is disconnected with the contact 3KM3.1, and the motor stops acting; the traveling mechanism stops advancing.
By the method, the travelling mechanism can be controlled to move at a high speed between the forward speed reducing point and the backward speed reducing point; the traveling mechanism can also be controlled to move at a low speed between the forward deceleration point and the forward limiting point and between the backward deceleration point and the backward limiting point.
Further, the motor is provided with a thermistor. The speed reduction circuit further comprises a relay 3F1, a contact 3F1 and a relay 3K 1; one end of the relay 3F1 is connected with a thermistor of the motor; the other end of the relay 3F1 is connected with a second power supply; contact 3F1 is connected to relay 3K 1; the control circuit also comprises a contact 3K1.1 and a contact 3K 1.2; contact 3K1.1 is connected between contact 3K5.2 and contact 3K 2.3; contact 3K1.2 is connected between contact 3K7.3 and contact 3K 3.3.
Further, carrying out the processes from the step (2) to the step (8); further comprising: the relay 3F1 is powered by a second power supply, and the relay 3F1 is connected with the thermistor; when the thermistor works normally, the relay 3F1 is powered; contact 3F1 is closed, relay 3K1 is powered; contact 3K1.1 and contact 3K1.2 are closed; so that the traveling mechanism is not influenced when moving forwards or backwards; when the temperature of the thermistor is overheated, the resistance of the thermistor is increased; the relay 3F1 loses power, and the contact 3F1 is disconnected; the relay 3K1 loses power; the contact 3K1.1 and the contact 3K1.2 are disconnected; the running gear is no longer active. Therefore, the temperature of the motor is prevented from being continuously increased due to the action of the travelling mechanism.
Drawings
Fig. 1 is a block diagram of an electronic control system using the present invention.
Fig. 2 is a schematic diagram of a main circuit and a speed reducing circuit of an electric control system using the present invention.
Fig. 3 is a schematic diagram of a control circuit using the electric control system of the present invention.
Fig. 4 is a schematic diagram of a brake circuit using the electric control system of the present invention.
Fig. 5 is a schematic view of the positions of the forward limit point, the forward deceleration point, the reverse deceleration point and the reverse limit point using the present invention.
In the above figures: 1-a speed reduction circuit; 2-a control circuit; 3-a main circuit; 4-a brake circuit; 51-a first power supply; 52-a second power supply; 6-a forward restriction site; 7-forward deceleration point; 8-a retreat deceleration point; 9-retrogradation restriction site.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-5; a control method of an electric control system of a speed reducing device; the electric control system comprises a main circuit 3, a control circuit 2, a speed reducing circuit 1 and a brake circuit 4; the main circuit 3, the speed reducing circuit 1 and the brake circuit 4 are respectively connected with the control circuit 2 through signals.
The main circuit 3 is connected to a first power supply 51; the main circuit 3 comprises a contact 3KM1.1, a contact 3KM2.1, a contact 3KM3.1, a contact 3KM4.1 and a motor 31; the contact 3KM1.1 is connected with a first power supply, and the contact 3KM3.1 is connected with the contact 3KM 1.1; the motor is connected with a contact 3KM 3.1; contact 3KM2.1 is connected in parallel and interlocked with contact 3KM 1.1; one end of the contact 3KM4.1 is connected with the contact 3KM 1.1; the other end of the contact 3KM4.1 is connected with a motor; contact 3KM4.1 interlocks with contact 3KM 3.1.
When contact 3KM1.1 is closed, contact 3KM2.1 is open; when contact 3KM2.1 is closed, contact 3KM1.1 is open; when contact 3KM3.1 is closed, contact 3KM4.1 is open; when contact 3KM4.1 is closed, contact 3KM3.1 is open; the use is safe.
The speed reduction circuit 1 is connected to the second power supply 52; the device comprises a normally closed limit travel switch ST6, a relay 3K2, a normally closed limit travel switch ST7, a relay 3K3, a speed reduction travel switch ST8 and a relay 3K 4; the normally closed limit travel switch ST6 is connected with a relay 3K 2; the normally closed limit travel switch ST7 is connected with the relay; the deceleration travel switch ST8 is connected to the relay 3K4.
The brake circuit 4 comprises a contact 3KM3.2, a contact 3KM4.2 and a normally closed brake 41; one end of the contact 3KM4.2 is connected to a first power supply 51; the normally closed brake is connected with a contact 3KM 4.2; one end of the contact 3KM3.2 is connected to a first power supply 51; the other end of contact 3KM3.2 is connected to the other end of contact 3KM 4.2.
The control circuit 2 is connected with the second circuit; the control circuit 2 comprises a manual double-contact switch SB5, a normally closed contact 3K6.1, a relay 3K5, a relay 3K6, a manual double-contact switch SB6, a relay 3K7, a normally closed contact 3K7.1, a relay 3K8, a contact 3K4.1, a contact 3K2.1, a relay 3KM3, a contact 3K5.1, a contact 3K8.1, a contact 3K3.1, a contact 3K6.2, a contact 3K2.2, a normally closed contact 3K4.2, a relay 3KM4, a contact 3K7.2, a contact 3K3.2, a contact 3K5.2, a contact 3K2.3, a normally closed contact 3KM2.2, a relay 3KM1, a contact 3K6.3, a contact 3K7.3, a contact 3K3.3, a normally closed contact 3KM1.2, a relay 3KM2 and a contact 3K 8.1.
The SB5.1 end of the manual double-contact switch SB5 is connected with the normally closed contact 3K 6.1; the normally closed contact 3K6.1 is connected with a relay 3K 5; the SB5.2 end of the manual double-contact switch SB5 is connected with the relay 3K 6; the SB6.2 end of the manual double-contact switch SB6 is connected with the relay 3K 7; the SB6.1 end of the manual double-contact switch SB6 is connected with the normally closed contact 3K 7.1; the normally closed contact 3K7.1 is connected to a relay 3K8.
Contact 3K4.1 is connected to contact 3K2.1, and contact 3K2.1 is connected to relay 3KM 3; the contact 3K8.1 is connected with the contact 3K 3.1; contact 3K5.1 is connected in parallel with contact 3K 4.1; the contacts 3K8.1 and 3K3.1 are connected in parallel with the contacts 3K4.1 and 3K 2.1.
The contact 3K6.2 is connected with the contact 3K2.2, the contact 3K2.2 is connected with the normally closed contact 3K4.2, and the normally closed contact 3K4.2 is connected with the relay 3KM 4; contact 3K7.2 is connected to contact 3K 3.2; the contact 3K7.2 and the contact 3K3.2 are connected with the contact 3K6.2 and the contact 3K2.2 in parallel;
the contact 3K5.2 is connected with the contact 3K2.3, the contact 3K2.3 is connected with the normally closed contact 3KM2.2, and the normally closed contact 3KM2.2 is connected with the relay 3KM 1; contact 3K6.3 is connected in parallel with contact 3K 5.2.
Contact 3K7.3 contact 3K3.3 is connected, contact 3K3.3 is connected to normally closed contact 3KM1.2, normally closed contact 3KM1.2 is connected to relay 3KM2, and contact 3K8.1 is connected in parallel to contact 3K 7.2.
In this embodiment, relay 3K1 mates with contacts 3K1.1, 3K 1.2; relay 3K2 mates with contact 3K2.1, contact 3K2.2, and contact 3K 2.3; relay 3K3 mates with contact 3K3.1, contact 3K3.2, and contact 3K 3.3; relay 3K4 mates with contact 3K4.1 and normally closed contact 3K 4.2; relay 3K5 mates with contact 3K5.1 and contact 3K 5.2; relay 3K6 mates with normally closed contact 3K6.1, contact 3K6.2, and contact 3K 6.3; relay 3K7 mates with normally closed contact 3K7.1, contact 3K7.2, and contact 3K 7.3; relay 3K8 mates with contact 3K 8.1; relay 3KM1 mated with contact 3KM1.1, contact 3KM1.2, and contact 3KM 1.3; relay 3KM2 mated with contact 3KM2.1, contact 3KM2.2, and contact 3KM 2.3; relay 3KM3 is mated with contact 3KM 3.1; relay 3KM4 mates with contact 3KM 4.1.
The normally closed limit travel switch ST6, the normally closed limit travel switch ST7 and the deceleration travel switch ST8 are arranged on the travelling mechanism; when in use, an advancing limiting point 6 is arranged at one end along the advancing direction of the walking mechanism; a backward limit point 9 is arranged at one end of the backward direction of the walking mechanism; a forward speed reducing point 7 and a backward speed reducing point 8 are arranged between the forward limiting point 6 and the backward limiting point 9; the forward deceleration point 7 is arranged close to the forward limit point 6; the backward deceleration point 8 is arranged close to the backward limit point 9; collision blocks are arranged on the forward limiting point 6, the forward deceleration point 7, the backward deceleration point 8 and the backward limiting point 9; the forward deceleration point 7 and the backward deceleration point 8 are used for controlling the traveling mechanism to decelerate after being contacted with a deceleration travel switch ST 8; the forward limit point 6 is used for controlling the walking mechanism to stop after being contacted with a normally closed limit travel switch ST 6; the backward limit point 9 is used for controlling the running mechanism to stop after being contacted with a normally closed limit travel switch ST 7.
When the normally closed limit travel switch ST6 is not contacted with the collision block of the forward limit point 6, the relay 3K2 is electrified; contact 3K2.2, contact 3K2.1 and contact 3K2.3 and closed. When the normally closed limit travel switch ST7 is not in contact with the bump of the backward limit point 9, the relay 3K3 is electrified; contact 3K3.1, contact 3K3.2 and contact 3K3.3 are closed.
Controlling the traveling mechanism to advance; when the SB5.2 end of the manual double-contact switch SB5 is closed; the relay 3K6 is powered; contact 3K6.2 and contact 3K6.3 are closed; the relay 3KM4 and the relay 3KM1 are powered; contact 3KM4.1 and contact 3KM1.1 are closed; the motor drives the travelling mechanism to advance at a high speed; meanwhile, the normally closed contact 3KM1.2 is disconnected, the normally closed contact 3K6.1 is disconnected, and the relay 3K5 loses power; the advancing of the travelling mechanism is prevented from being influenced.
When the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the forward limit point 6; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected, and the relay 3KM4 loses power; the contact 3K4.1 is closed, and the relay 3KM3 is electrified; the contact 3KM3.1 is closed; the contact 3KM4.1 is disconnected; the traveling mechanism is switched to low-speed advancing; when the normally closed limit travel switch ST6 of the traveling mechanism collides with the collision block of the forward limit point 6; the normally closed limit travel switch ST6 is off; the relay 3K2 loses power, and the contact 3K2.1, the contact 3K2.2 and the contact 3K2.3 are disconnected; the contact 3KM1.1 is disconnected with the contact 3KM3.1, and the motor stops acting; the traveling mechanism stops advancing.
Controlling the travelling mechanism at the forward limit point 6 to retreat; when the SB6.2 end of the manual double-contact switch SB6 is closed; the relay 3K7 is powered; contact 3K7.2 and contact 3K7.3 are closed; at the moment, as the speed reduction travel switch ST8 is closed, the normally closed contact 3K4.2 is opened, and the contact 3K4.1 is closed; the relay 3KM3 and the relay 3KM2 are powered; the traveling mechanism can retreat at a low speed; meanwhile, the normally closed contact 3K7.1 is disconnected, and the relay 3K8 loses power.
When the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the forward limit point 6; the deceleration stroke switch ST8 is off; the relay 3K4 loses power; the normally closed contact 3K4.2 is closed; the contact 3K4.1 is disconnected; the relay 3KM4 is powered on, and the relay 3KM3 is disconnected; the traveling mechanism is switched to high-speed backward movement; after the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the rear limit point; the deceleration travel switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; contact 3K4.1 is closed; the relay 3KM4 is switched off, and the relay 3KM3 is powered; the traveling mechanism is switched to low-speed backward movement; when the normally closed limit travel switch ST7 of the traveling mechanism collides with the collision block of the backward moving limit point 9; the normally closed limit travel switch ST7 is turned off; the relay 3K3 loses power, and the contact 3K3.1, the contact 3K3.2 and the contact 3K3.3 are disconnected; the contact 3KM2.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops moving backward.
Controlling the traveling mechanism to retreat; when the SB6.2 end of the manual double-contact switch SB6 is closed; the relay 3K7 is powered; simultaneously, the contact 3K7.2 and the contact 3K7.3 are closed; the relay 3KM4 and the relay 3KM2 are powered; contact 3KM4.1 and contact 3KM2.1 are closed; the motor drives the travelling mechanism to retreat at a high speed; meanwhile, the normally closed contact 3KM2.2 is disconnected, the normally closed contact 3K7.1 is disconnected, and the relay 3K8 loses power; the backward movement of the walking mechanism is avoided being influenced.
After the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the rear limit point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; the relay 3KM4 loses power; contact 3K4.1 is closed; the relay 3KM3 is electrified; the contact 3KM3.1 is closed; the contact 3KM4.1 is disconnected; the traveling mechanism is switched to low-speed backward movement; when the normally closed limit travel switch ST7 of the traveling mechanism collides with the collision block of the backward limit point 9; the normally closed limit travel switch ST7 is turned off; the relay 3K3 loses power, and the contact 3K3.1, the contact 3K3.2 and the contact 3K3.3 are disconnected; the contact 3KM2.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops moving backward.
Controlling the travelling mechanism at the backward limit point 9 to advance; when the SB5.2 end of the manual double-contact switch SB5 is closed; the relay 3K6 is powered; contact 3K6.2 and contact 3K6.3 are closed; at the moment, as the speed reduction travel switch ST8 is closed, the normally closed contact 3K4.2 is opened, and the contact 3K4.1 is closed; the relay 3KM3 and the relay 3KM1 are powered; the traveling mechanism advances at a low speed; meanwhile, the normally closed contact 3K6.1 is disconnected, and the relay 3K5 loses power; the forward movement of the travelling mechanism is prevented from being influenced.
When the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the backward limit point 9; the deceleration stroke switch ST8 is off; the relay 3K4 loses power; the normally closed contact 3K4.2 is closed; the contact 3K4.1 is disconnected; the relay 3KM4 is powered on, and the relay 3KM3 is disconnected; the traveling mechanism is switched to advance at a high speed; when the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the advance limit point 6; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; contact 3K4.1 is closed; the relay 3KM4 is switched off, and the relay 3KM3 is powered; the traveling mechanism is switched to low-speed advancing; when the normally closed limit travel switch ST6 of the traveling mechanism collides with the collision block of the forward limit point 6; the normally closed limit travel switch ST6 is turned off; the relay 3K2 loses power, and the contact 3K2.1, the contact 3K2.2 and the contact 3K2.3 are disconnected; the contact 3KM1.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops advancing.
The power is obtained through a relay 3KM 3; closing an electric shock 3KM 3.2; opening a normally closed brake; the traveling mechanism further realizes high-speed forward or high-speed backward; the power is obtained through a relay 3KM 4; closing an electric shock of 3KM 4.2; opening a normally closed brake; and then the traveling mechanism realizes low-speed forward or low-speed backward.
The system can control the traveling mechanism to move at a high speed between the forward deceleration point 7 and the backward deceleration point 8; the traveling mechanism can be controlled to move at a low speed between the forward deceleration point 7 and the forward limit point 6 and between the backward deceleration point 8 and the backward limit point 9.
The motor is provided with a thermistor. The speed reduction circuit further comprises a relay 3F1, a contact 3F1 and a relay 3K 1; one end of the relay 3F1 is connected with a thermistor of the motor; the other end of the relay 3F1 is connected with a second power supply; the contact 3F1 is connected with a relay 3K 1; the control circuit also comprises a contact 3K1.1 and a contact 3K 1.2; contact 3K1.1 is connected between contact 3K5.2 and contact 3K 2.3; contact 3K1.2 is connected between contact 3K7.3 and contact 3K 3.3.
The relay 3F1 is powered by a second power supply, and the relay 3F1 is connected with the thermistor; meanwhile, a contact 3K1.1 is connected between a contact 3K5.2 and a contact 3K 2.3; contact 3K1.2 is connected between contact 3K7.3 and contact 3K 3.3; when the thermistor works normally, the relay 3F1 is powered; contact 3F1 is closed, relay 3K1 is powered; contact 3K1.1 and contact 3K1.2 are closed; the walking mechanism is not affected when moving forwards or backwards; when the temperature of the thermistor is overheated, the resistance of the thermistor is increased; the relay 3F1 loses power, and the contact 3F1 is disconnected; the relay 3K1 loses power; the contact 3K1.1 and the contact 3K1.2 are disconnected; the running mechanism does not act any more; the temperature of the motor is prevented from being continuously increased due to the action of the travelling mechanism.
The control circuit also comprises a contact 3KM1.3, a contact 3KM2.3 and an acousto-optic indication module; the acousto-optic indication module comprises an illuminating lamp EL5 and a horn HA 2; the contact 3KM1.3 is connected with an illuminating lamp EL5, and the contact 3KM2.3 is connected with the contact 3KM1.3 in parallel; the horn HA2 is connected in parallel with the lighting lamp EL 5. When the walking mechanism moves forwards or backwards, the light gives out a prompt and the sound gives out a prompt.
The control method of the electric control system comprises the following steps:
(1) presetting a forward limit point, a forward deceleration point, a backward deceleration point and a backward limit point; the forward deceleration point is positioned between the forward limit point and the backward limit point; the backward speed reducing point is positioned between the forward speed reducing point and the backward limiting point; collision blocks are arranged on the forward limiting point, the forward deceleration point, the backward deceleration point and the backward limiting point; the traveling mechanism is provided with a normally closed limit travel switch ST6, a normally closed limit travel switch ST7 and a deceleration travel switch ST 8.
(2) If the traveling mechanism is controlled to advance, the step (3) is carried out; and (6) if the traveling mechanism is controlled to retreat.
(3) The SB5.2 end of the manual double-contact switch SB5 is closed; the relay 3K6 is powered; contact 3K6.2 and contact 3K6.3 are closed; the relay 3KM4 and the relay 3KM1 are powered; contact 3KM4.1 and contact 3KM1.1 are closed; the motor drives the traveling mechanism to advance at high speed.
(4) After the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the advancing limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected, and the relay 3KM4 loses power; the contact 3K4.1 is closed, and the relay 3KM3 is electrified; the contact 3KM3.1 is closed; the contact 3KM4.1 is disconnected; the traveling mechanism is switched to low-speed advance.
(5) After a normally closed limit travel switch ST6 of the traveling mechanism collides with a collision block of an advancing limit point; the normally closed limit travel switch ST6 is turned off; the relay 3K2 loses power, and the contact 3K2.1, the contact 3K2.2 and the contact 3K2.3 are disconnected; the contact 3KM1.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops advancing.
And (5.1) if the traveling mechanism at the forward limit point is controlled to retreat, performing the step (5.2).
(5.2) the SB6.2 end of the manual two-contact switch SB6 is closed; the relay 3K7 is powered; contact 3K7.2 and contact 3K7.3 are closed; at the moment, as the speed reduction travel switch ST8 is closed, the normally closed contact 3K4.2 is opened, and the contact 3K4.1 is closed; the relay 3KM3 and the relay 3KM2 are electrified; the traveling mechanism is retreated at a low speed.
(5.3) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of an advancing limiting point; the deceleration stroke switch ST8 is off; the relay 3K4 loses power; the normally closed contact 3K4.2 is closed; the contact 3K4.1 is disconnected; the relay 3KM4 is electrified, and the relay 3KM3 is disconnected; the traveling mechanism is switched to high-speed backward movement.
(5.4) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of a rear limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; contact 3K4.1 is closed; the relay 3KM4 is switched off, and the relay 3KM3 is powered; the traveling mechanism is switched to low-speed backward movement.
(5.5) after the normally closed limit travel switch ST7 of the traveling mechanism collides with the collision block of the backward limit point 9; the normally closed limit travel switch ST7 is turned off; the relay 3K3 loses power, and the contact 3K3.1, the contact 3K3.2 and the contact 3K3.3 are disconnected; the contact 3KM2.1 is disconnected with the contact 3KM3.1, and the motor stops acting; the traveling mechanism stops moving backward.
(6) The SB6.2 end of the manual double-contact switch SB6 is closed; the relay 3K7 is powered; simultaneously, the contact 3K7.2 and the contact 3K7.3 are closed; the relay 3KM4 and the relay 3KM2 are powered; contact 3KM4.1 and contact 3KM2.1 are closed; the motor drives the travelling mechanism to retreat at a high speed.
(7) After the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the rear limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; the relay 3KM4 loses power; contact 3K4.1 is closed; the relay 3KM3 is electrified; the contact 3KM3.1 is closed; the contact 3KM4.1 is disconnected; the traveling mechanism is switched to low-speed backward.
(8) When the normally closed limit travel switch ST7 of the traveling mechanism collides with the collision block of the backward limit point; the normally closed limit travel switch ST7 is turned off; the relay 3K3 loses power, and the contact 3K3.1, the contact 3K3.2 and the contact 3K3.3 are disconnected; the contact 3KM2.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops moving backward.
And (8.1) if the traveling mechanism at the backward movement limiting point is controlled to advance, performing the step (8.2).
(8.2) the SB5.2 end of the manual two-contact switch SB5 is closed; the relay 3K6 is powered; contact 3K6.2 and contact 3K6.3 are closed; at the moment, as the speed reduction travel switch ST8 is closed, the normally closed contact 3K4.2 is opened, and the contact 3K4.1 is closed; the relay 3KM3 and the relay 3KM1 are electrified; the traveling mechanism advances at a low speed.
(8.3) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of a backward limit point; the deceleration stroke switch ST8 is off; the relay 3K4 loses power; the normally closed contact 3K4.2 is closed; the contact 3K4.1 is disconnected; the relay 3KM4 is powered on, and the relay 3KM3 is disconnected; the traveling mechanism is switched to high-speed travel.
(8.4) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of an advancing limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; contact 3K4.1 is closed; the relay 3KM4 is switched off, and the relay 3KM3 is powered; the traveling mechanism is switched to low-speed forward.
(8.5) after a normally closed limit travel switch ST6 of the traveling mechanism collides with a collision block of an advancing limit point; the normally closed limit travel switch ST6 is off; the relay 3K2 loses power, and the contact 3K2.1, the contact 3K2.2 and the contact 3K2.3 are disconnected; the contact 3KM1.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops advancing.
The above method; an advancing limiting point is arranged at one end along the advancing direction of the walking mechanism; a backward limiting point is arranged at one end of the backward direction of the walking mechanism; an advancing speed reducing point and a retreating speed reducing point are arranged between the advancing limit point and the retreating limit point; the forward deceleration point is arranged close to the forward limit point; the backward deceleration point is arranged close to the backward limit point; collision blocks are arranged on the forward limiting point, the forward deceleration point, the backward deceleration point and the backward limiting point; the forward speed reducing point and the backward speed reducing point are used for controlling the travelling mechanism to reduce speed after being contacted with a speed reducing travel switch ST 8; the forward limit point is used for controlling the running mechanism to stop after being contacted with a normally closed limit travel switch ST 6; the backward limit point is used for controlling the running mechanism to stop after being contacted with a normally closed limit travel switch ST 7.
When the normally closed limit travel switch ST6 is not in contact with the bump of the advance limit point, the relay 3K2 is electrified; contact 3K2.2, contact 3K2.1 and contact 3K2.3 are closed. When the normally closed limit travel switch ST7 is not contacted with the bump of the backward limit point, the relay 3K3 is electrified; contact 3K3.1, contact 3K3.2 and contact 3K3.3 are closed. The speed of the travelling mechanism is controlled to advance and retreat; when the travelling mechanism moves to a forward speed reduction point or a backward speed reduction point, the travelling mechanism is switched to low-speed movement; reducing the speed of the travelling mechanism; when the traveling mechanism moves at a high speed, the forward limiting point or the backward limiting point can not limit the traveling mechanism. The high-speed movement of the traveling mechanism between the forward speed reducing point and the backward speed reducing point is controlled; the traveling mechanism can also be controlled to move at a low speed between the forward deceleration point and the forward limiting point and between the backward deceleration point and the backward limiting point.
During the step (2) to the step (8); further comprising: the relay 3F1 is powered by a second power supply, and the relay 3F1 is connected with the thermistor; when the thermistor works normally, the relay 3F1 is powered; contact 3F1 is closed, relay 3K1 is powered; contact 3K1.1 and contact 3K1.2 are closed; the walking mechanism is not affected when moving forwards or backwards; when the temperature of the thermistor is overheated, the resistance of the thermistor is increased; the relay 3F1 loses power, and the contact 3F1 is disconnected; the relay 3K1 loses power; the contact 3K1.1 and the contact 3K1.2 are disconnected; the running gear is no longer active. Therefore, the temperature of the motor is prevented from being continuously increased due to the action of the travelling mechanism.

Claims (5)

1. A control method of an electric control system of a speed reducing device is characterized in that: the electric control system comprises a main circuit, a control circuit and a speed reducing circuit; the main circuit and the speed reducing circuit are respectively connected with the control circuit through signals;
the main circuit comprises a contact 3KM1.1, a contact 3KM2.1, a contact 3KM3.1, a contact 3KM4.1 and a motor; the contact 3KM1.1 is connected with a first power supply, and the contact 3KM3.1 is connected with the contact 3KM 1.1; the motor is connected with a contact 3KM 3.1; contact 3KM2.1 is connected in parallel with contact 3KM 1.1; one end of the contact 3KM4.1 is connected with the contact 3KM 1.1; the other end of the contact 3KM4.1 is connected with a motor;
the speed reducing circuit is connected with a second power supply; the device comprises a normally closed limit travel switch ST6, a relay 3K2, a normally closed limit travel switch ST7, a relay 3K3, a speed reduction travel switch ST8 and a relay 3K 4; the normally closed limit travel switch ST6 is connected with the relay 3K 2; the normally closed limit travel switch ST7 is connected with the relay; the deceleration travel switch ST8 is connected with a relay 3K 4;
the control circuit comprises a manual double-contact switch SB5, a normally closed contact 3K6.1, a relay 3K5, a relay 3K6, a manual double-contact switch SB6, a relay 3K7, a normally closed contact 3K7.1, a relay 3K8, a contact 3K4.1, a contact 3K2.1, a relay 3KM3, a contact 3K5.1, a contact 3K8.1, a contact 3K3.1, a contact 3K6.2, a contact 3K2.2, a normally closed contact 3K4.2, a relay 3KM4, a contact 3K7.2, a contact 3K3.2, a contact 3K5.2, a contact 3K2.3, a normally closed contact 3KM2.2, a relay 3KM1, a contact 3K6.3, a contact 3K7.3, a contact 3K3.3, a normally closed contact 3KM1.2, a relay 3KM2 and a contact 3K 8.1;
the SB5.1 end of the manual double-contact switch SB5 is connected with the normally closed contact 3K 6.1; the normally closed contact 3K6.1 is connected with a relay 3K 5; the SB5.2 end of the manual double-contact switch SB5 is connected with the relay 3K 6; the SB6.2 end of the manual double-contact switch SB6 is connected with the relay 3K 7; the SB6.1 end of the manual double-contact switch SB6 is connected with the normally closed contact 3K 7.1; the normally closed contact 3K7.1 is connected with a relay 3K 8;
contact 3K4.1 is connected to contact 3K2.1, and contact 3K2.1 is connected to relay 3KM 3; the contact 3K8.1 is connected with the contact 3K 3.1; contact 3K5.1 is connected in parallel with contact 3K 4.1; the contact 3K8.1 and the contact 3K3.1 are connected with the contact 3K4.1 and the contact 3K2.1 in parallel;
the contact 3K6.2 is connected with the contact 3K2.2, the contact 3K2.2 is connected with the normally closed contact 3K4.2, and the normally closed contact 3K4.2 is connected with the relay 3KM 4; contact 3K7.2 is connected to contact 3K 3.2; the contact 3K7.2 and the contact 3K3.2 are connected with the contact 3K6.2 and the contact 3K2.2 in parallel;
the contact 3K5.2 is connected with the contact 3K2.3, the contact 3K2.3 is connected with the normally closed contact 3KM2.2, and the normally closed contact 3KM2.2 is connected with the relay 3KM 1; contact 3K6.3 is connected in parallel with contact 3K 5.2;
a contact 3K7.3 and a contact 3K3.3 are connected, the contact 3K3.3 is connected with a normally closed contact 3KM1.2, the normally closed contact 3KM1.2 is connected with a relay 3KM2, and the contact 3K8.1 is connected with the contact 3K7.2 in parallel;
a control method of the electric control system; the method comprises the following steps:
(1) presetting a forward limit point, a forward deceleration point, a backward deceleration point and a backward limit point; the forward speed reduction point is positioned between the forward limit point and the backward limit point; the backward speed reducing point is positioned between the forward speed reducing point and the backward limiting point; collision blocks are arranged on the forward limiting point, the forward deceleration point, the backward deceleration point and the backward limiting point; a normally closed limit travel switch ST6, a normally closed limit travel switch ST7 and a deceleration travel switch ST8 are arranged on the travelling mechanism;
(2) if the travelling mechanism is controlled to advance, performing the step (3); if the traveling mechanism is controlled to retreat, the step (6) is carried out;
(3) the SB5.2 end of the manual double-contact switch SB5 is closed; the relay 3K6 is powered; contact 3K6.2 and contact 3K6.3 are closed; the relay 3KM4 and the relay 3KM1 are powered; contact 3KM4.1 and contact 3KM1.1 are closed; the motor drives the travelling mechanism to advance at a high speed;
(4) after the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the advancing limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected, and the relay 3KM4 loses power; the contact 3K4.1 is closed, and the relay 3KM3 is electrified; the contact 3KM3.1 is closed; the contact 3KM4.1 is disconnected; the traveling mechanism is switched to low-speed advancing;
(5) after a normally closed limit travel switch ST6 of the traveling mechanism collides with a collision block of an advancing limit point; the normally closed limit travel switch ST6 is turned off; the relay 3K2 loses power, and the contact 3K2.1, the contact 3K2.2 and the contact 3K2.3 are disconnected; the contact 3KM1.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops advancing;
(6) the SB6.2 end of the manual double-contact switch SB6 is closed; the relay 3K7 is powered; simultaneously, the contact 3K7.2 and the contact 3K7.3 are closed; the relay 3KM4 and the relay 3KM2 are powered; contact 3KM4.1 and contact 3KM2.1 are closed; the motor drives the travelling mechanism to retreat at a high speed;
(7) after the deceleration travel switch ST8 of the traveling mechanism collides with the collision block of the rear limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; the relay 3KM4 loses power; contact 3K4.1 is closed; the relay 3KM3 is electrified; the contact 3KM3.1 is closed; contact 3KM4.1 is open; the traveling mechanism is switched to low-speed backward movement;
(8) when the normally closed limit travel switch ST7 of the traveling mechanism collides with the collision block of the backward limit point; the normally closed limit travel switch ST7 is turned off; the relay 3K3 loses power, and the contact 3K3.1, the contact 3K3.2 and the contact 3K3.3 are disconnected; the contact 3KM2.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops moving backward.
2. The control method of an electric control system of a reduction gear according to claim 1, characterized in that: the step (5) is followed by the steps (5.1) - (5.5);
(5.1) if the travelling mechanism at the forward limit point is controlled to retreat, performing the step (5.2);
(5.2) the SB6.2 end of the manual two-contact switch SB6 is closed; the relay 3K7 is powered; contact 3K7.2 and contact 3K7.3 are closed; at the moment, as the speed reduction travel switch ST8 is closed, the normally closed contact 3K4.2 is opened, and the contact 3K4.1 is closed; the relay 3KM3 and the relay 3KM2 are powered; the traveling mechanism can retreat at a low speed;
(5.3) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of an advancing limiting point; the deceleration stroke switch ST8 is off; the relay 3K4 loses power; the normally closed contact 3K4.2 is closed; the contact 3K4.1 is disconnected; the relay 3KM4 is electrified, and the relay 3KM3 is disconnected; the traveling mechanism is switched to high-speed backward movement;
(5.4) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of a rear limiting point; the deceleration stroke switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; contact 3K4.1 is closed; the relay 3KM4 is switched off, and the relay 3KM3 is powered; the traveling mechanism is switched to low-speed backward movement;
(5.5) after the normally closed limit travel switch ST7 of the traveling mechanism collides with the collision block of the backward limit point 9; the normally closed limit travel switch ST7 is turned off; the relay 3K3 loses power, and the contact 3K3.1, the contact 3K3.2 and the contact 3K3.3 are disconnected; the contact 3KM2.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops moving backward.
3. The control method of an electric control system of a reduction gear according to claim 1, characterized in that: the step (8) is followed by the steps (8.1) - (8.5);
(8.1) if the travelling mechanism at the backward movement limiting point is controlled to advance, performing the step (8.2);
(8.2) the SB5.2 end of the manual two-contact switch SB5 is closed; the relay 3K6 is powered; contact 3K6.2 and contact 3K6.3 are closed; at the moment, as the speed reduction travel switch ST8 is closed, the normally closed contact 3K4.2 is opened, and the contact 3K4.1 is closed; the relay 3KM3 and the relay 3KM1 are electrified; the traveling mechanism advances at a low speed;
(8.3) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of a backward limit point; the deceleration stroke switch ST8 is off; the relay 3K4 loses power; the normally closed contact 3K4.2 is closed; the contact 3K4.1 is disconnected; the relay 3KM4 is powered on, and the relay 3KM3 is disconnected; the traveling mechanism is switched to advance at a high speed;
(8.4) after a deceleration travel switch ST8 of the traveling mechanism collides with a collision block of an advancing limiting point; the deceleration travel switch ST8 is closed; the relay 3K4 is powered; the normally closed contact 3K4.2 is disconnected; contact 3K4.1 is closed; the relay 3KM4 is switched off, and the relay 3KM3 is powered; the traveling mechanism is switched to low-speed advancing;
(8.5) after a normally closed limit travel switch ST6 of the traveling mechanism collides with a collision block of an advancing limit point; the normally closed limit travel switch ST6 is turned off; the relay 3K2 loses power, and the contact 3K2.1, the contact 3K2.2 and the contact 3K2.3 are disconnected; the contact 3KM1.1 and the contact 3KM3.1 are disconnected, and the motor stops acting; the traveling mechanism stops advancing.
4. The control method of an electric control system of a reduction gear according to claim 1, characterized in that: the motor is provided with a thermistor; the speed reduction circuit further comprises a relay 3F1, a contact 3F1 and a relay 3K 1; one end of the relay 3F1 is connected with a thermistor of the motor; the other end of the relay 3F1 is connected with a second power supply; the contact 3F1 is connected with a relay 3K 1; the control circuit also comprises a contact 3K1.1 and a contact 3K 1.2; contact 3K1.1 is connected between contact 3K5.2 and contact 3K 2.3; contact 3K1.2 is connected between contact 3K7.3 and contact 3K 3.3.
5. The control method of an electric control system of a reduction gear according to claim 4, characterized in that: performing the processes of the step (2) to the step (8); further comprising: the relay 3F1 is powered by a second power supply, and the relay 3F1 is connected with the thermistor; when the thermistor works normally, the relay 3F1 is electrified; contact 3F1 is closed, relay 3K1 is powered; contact 3K1.1 and contact 3K1.2 are closed; the walking mechanism is not affected when moving forwards or backwards; when the temperature of the thermistor is overheated, the resistance of the thermistor is increased; the relay 3F1 loses power, and the contact 3F1 is disconnected; the relay 3K1 loses power; the contact 3K1.1 and the contact 3K1.2 are disconnected; the running gear is no longer active.
CN202111327574.6A 2021-11-10 2021-11-10 Control method of electric control system of speed reducing device Pending CN115051621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111327574.6A CN115051621A (en) 2021-11-10 2021-11-10 Control method of electric control system of speed reducing device

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Application Number Priority Date Filing Date Title
CN202111327574.6A CN115051621A (en) 2021-11-10 2021-11-10 Control method of electric control system of speed reducing device

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CN115051621A true CN115051621A (en) 2022-09-13

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CN202111327574.6A Pending CN115051621A (en) 2021-11-10 2021-11-10 Control method of electric control system of speed reducing device

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