CN104085793A - Control system of quenching mechanism - Google Patents
Control system of quenching mechanism Download PDFInfo
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- CN104085793A CN104085793A CN201410329072.0A CN201410329072A CN104085793A CN 104085793 A CN104085793 A CN 104085793A CN 201410329072 A CN201410329072 A CN 201410329072A CN 104085793 A CN104085793 A CN 104085793A
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Abstract
The invention provides a control system of a quenching mechanism. The control system comprises at least two alternating-current motors and a direct-current speed adjusting device, wherein stators of the two alternating-current motors are connected with the direct-current speed adjusting device in series. According to the control system, the descent speed of a lifting unit is increased, and the requirement on rapid braking of a large-tonnage workpiece can be met.
Description
Technical field
The present invention relates to motor electric control system field, relate in particular to a kind of control system of the quenching mechanism for quenching crane.
Background technology
Hoisting crane is a kind of electromechanical appliance that takes weight by vertical lift or vertical lift and parallel motion.Quenching crane carries out quenching technical processing for handling mechanical workpieces, quenching crane can be fast by workpiece from heating furnace handling to quenching bath, when declining, require the command speed fast-descending with 2 times.Particularity based on quenching technical, requires lifting unit can realize the command speed fast-descending of 2 times, and can be at fast state accurate stopping, does not produce to slip hook phenomenon.Also require the operating unit starting and braking of quenching crane to operate steadily, and can quick and precisely stop at the station place of requirement simultaneously.
As shown in Figure 1, the control system of the monomotor quenching mechanism of prior art, comprises AC contactor 1, electrical motor 2, direct current speeder 3, resistor 4, drg 5 and a current-limiting resistance 6.The quenching mechanism of quenching crane, when rising operation, is controlled electrical motor 2 work by described AC contactor 1, when quenching mechanism declines operation, by direct current speeder 3, controls motor 2 work.
During quenching, direct current speeder 3 driving motors 2 are transferred in quenching bath with 2 times of workpiece fast speedes of being quenched of ascending velocity, when entering quenching bath and stopping, direct current speeder 3 carries out brute force, short range braking (drg 5 directly retracts zero-bit) fast, in order to avoid smash quenching bath.
Yet, the control system of the quenching mechanism of single motor as shown in Figure 1, lifting unit adopts dynamic brake mode at descent direction, and speed range is little.Hardening time is long, in the time will shortening hardening time, will expanded motor capacity and the power of mechanics, thereby cause that dolly height increases, and increases factory building cost.
Particularly, there is following shortcoming in the control system of monomotor quenching mechanism:
1. descending speed is limited by motor power (output), and speed is lower;
2. quenching quality can not finely be controlled;
3. when improving descending speed, electrical motor can become greatly, thereby increases the height of whole quenching crane, will improve factory building cost thus.
As shown in Figure 2, the control system of the double motor quenching mechanism of prior art, comprises AC contactor 1, two alternating-current motor/AC motors, two direct current speeders, two resistors, drg 5 and two current-limiting resistances.Wherein, two alternating-current motor/AC motors comprise respectively alternating-current motor/AC motor 21, alternating-current motor/AC motor 22, two direct current speeders comprise respectively direct current speeder 31, direct current speeder 32, two resistors comprise that respectively resistor divides 41, resistor divides 42, and two current-limiting resistances comprise respectively current-limiting resistance 61, current-limiting resistance 62.Alternating-current motor/AC motor 21, direct current speeder 31, resistor divide 41, current-limiting resistance 61, AC contactor 1 and drg 5 can form with Fig. 1 in the control system of quenching mechanism of similar single motor.And alternating-current motor/AC motor 22, direct current speeder 32, resistor divide 42, current-limiting resistance 62, AC contactor 1 and drg 5 also can form with Fig. 1 in the control system of quenching mechanism of similar single motor.
Also be, the control system of this double motor quenching mechanism, when quenching mechanism is when descent direction moves, use two direct current speeders to control separately respectively corresponding electrical motor (the corresponding alternating-current motor/AC motor 21 of direct current speeder 31, corresponding alternating-current motor/AC motor 22 work of direct current speeder 32.
The quenching mechanism that this uses double motor, can meet the snap catch requirement of large-tonnage, high-speed quenching crane, but when two motors is worked simultaneously, requires two motors rising, descending speed synchronous, and moment size is identical.And when two motors is controlled by two cover direct current speeders respectively, because the impossible performance of two cover direct current speeders is in full accord, the DC current that passes into two motors stator is also incomplete same, makes the quenching mechanism of this use double motor cannot meet the synchronous requirement of two motors.In addition, the quenching mechanism of this double motor is used two cover direct current speeders, and cost is higher.
In the disclosed above-mentioned information of described background technology part, only for strengthening the understanding to background of the present invention, so it can comprise the information not forming prior art known to persons of ordinary skill in the art.
Summary of the invention
Therefore, one of object of the present invention is to provide a kind of novelty, and between multiple motors, has the quenching mechanism control system of high synchronism.
Other objects of the present invention, characteristic and advantage become the detailed description by below obviously, or the partly acquistion by practice of the present invention.
According to an aspect of the present invention, provide a kind of quenching mechanism control system, comprise at least two alternating-current motor/AC motors and a direct current speeder, stator and the direct current speeder of wherein said at least two alternating-current motor/AC motors are connected in series.
An embodiment therein, described direct current speeder when described lifting unit declines, the rotating speed of at least two alternating-current motor/AC motors described in control.
An embodiment therein, also comprise AC contactor and be subject to described in the lifting unit of at least two alternating-current motor/AC motor co-controllings, described AC contactor is connected with described at least two alternating-current motor/AC motors, in order to control described two alternating-current motor/AC motor rotating speeds when described lifting unit rises.
An embodiment therein, when described lifting unit rises, described AC contactor locks described direct current speeder in non-operating condition.
An embodiment therein, also comprises that drg is in order to brake described lifting unit.
An embodiment therein, also comprises speed-slackening signal processing unit, in order to accept lifting unit, stops movable signal and controls described drg braking.
The quenching mechanism control system that the present invention proposes, is used two alternating-current motor/AC motors, and the comparable single motor of descending speed improves 100%, can make lifting unit descending speed of the present invention faster, can meet the requirement of large-tonnage workpiece snap catch.The stator of described two alternating-current motor/AC motors and same direct current speeder are connected in series, the DC current that two motors stator is passed into is identical, can meet the synchronous requirement of two motors, and only need to use a direct current speeder, reduce costs.In addition, the speed that enters quenching bath due to workpiece is high, will improve quenching quality; When monomotor changes into after double motor, car load height reduces, and will reduce factory building cost.
Accompanying drawing explanation
To those skilled in the art, by reading being below shown in the detailed description of the example embodiment in each accompanying drawing, above-mentioned and further feature of the present invention and advantage will become more obvious.
Fig. 1 is the control system schematic diagram of the monomotor quenching mechanism of prior art;
Fig. 2 is the control system schematic diagram of the double motor quenching mechanism of prior art;
Fig. 3 is the double motor quenching mechanism control system schematic diagram of the embodiment of the present invention.
The specific embodiment
Referring now to accompanying drawing, embodiment is more fully described.Yet embodiment can be implemented in a variety of forms, and should not be understood to be limited to embodiment set forth herein; On the contrary, provide these embodiments to make the present invention by comprehensive and complete, and the design of embodiment is conveyed to those skilled in the art all sidedly.In the drawings, for clear, exaggerated region and/or layer thickness.Identical in the drawings Reference numeral represents same or similar part, thereby can omit being repeated in this description of they.
In addition, described feature, structure or characteristic can be combined in one or more embodiment in any suitable manner.In the following description, thus provide many details to provide fully understanding embodiments of the invention.Yet, one of skill in the art will appreciate that and can put into practice technical scheme of the present invention and there is no one or more in described specific detail, or can adopt other method, constituent element, material etc.In other cases, be not shown specifically or describe known configurations, material or operation to avoid fuzzy each aspect of the present invention.
The exemplary embodiments that embodies feature & benefits of the present invention will describe in detail in the following description.Be understood that the present invention can have various variations on different embodiment, it neither departs from the scope of the present invention, and explanation wherein and accompanying drawing be when the use that explain in itself, but not in order to limit the present invention.
Fig. 3 is the double motor quenching mechanism control system schematic diagram of the embodiment of the present invention.As shown in Figure 3, quenching mechanism comprises AC contactor 1, alternating-current motor/AC motor 21 and alternating-current motor/AC motor 22, direct current speeder 3, resistor 41 and resistor 42, drg 5, current-limiting resistance 6, lifting unit (not shown) and speed-slackening signal processing unit (not shown) by control system.The parameter of two alternating-current motor/AC motors of the embodiment of the present invention is consistent.The alternating-current motor/AC motor of the embodiment of the present invention can be AC winding induction motor, but the present invention is not as limit.
Wherein, resistor 41 and resistor 41 are connected to the rotor-side of alternating-current motor/AC motor 21 and alternating-current motor/AC motor 22.The mouth of direct current speeder 3 is connected with contactless switch K3, current-limiting resistance 6.After the stator of alternating-current motor/AC motor 21 and alternating-current motor/AC motor 22 is connected in series mutually, be connected in series with direct current speeder 3.AC contactor 1 comprises AC contactor K1 and AC contactor K2.AC contactor K1, K2 are connected with the stator side of alternating-current motor/AC motor 22 with alternating-current motor/AC motor 21 with contactless switch K3.Drg 5 is in order to brake lifting unit.Speed-slackening signal processing unit, stops movable signal in order to accept lifting unit, and this movable signal is carried out controlling drg 5 brakings after logical process.
The flow direction of the electric current I of direct current speeder 3 as shown in Figure 3, flows out the DC current I of direct current speeder 3 after current-limiting resistance 6, flows into again direct current speeder 3 after flowing into successively alternating-current motor/AC motor 21 and alternating-current motor/AC motor 22.Because any two-phase of AC electrical machine stator passes into direct current (DC), can produce lock torque, along with increase or the minimizing of the DC current passing into, the lock torque of generation will increase accordingly or reduce.When two motors stator is connected, while being controlled by a set of direct current speeder 3, the DC current I that passes into two motors is identical, and the parameter of this two motors is identical, therefore this two motors can be worked simultaneously, has synchronous rising, descending speed, and moment size is also identical.
Particularly, lifting unit is quenched after workpiece slinging, and rises to rational height, then hoisting crane is reached to the top of quenching bath, by the lifting unit workpiece of being quenched, transferred in quenching bath and quenched, the workpiece of being quenched again after the completion of quenching is sling, and then transfers to rational position.
Wherein, by alternating-current motor/AC motor 21 and alternating-current motor/AC motor 22, control this lifting unit simultaneously.When this lifting unit rises, AC contactor 1 is blocked direct current speeder 3 by AC contactor K2, controls two alternating-current motor/AC motor rotating speeds with this lifting unit that hoists simultaneously.When above-mentioned lifting unit rises, AC contactor 1 locking direct current speeder 3, makes direct current speeder 3 in non-operating condition.When lifting unit declines, two alternating-current motor/AC motors of direct current speeder 3 synchro control are transferred in quenching bath with 2 times of workpiece fast speedes of being quenched of ascending velocity.When entering quenching bath and stopping, direct current speeder 3 carries out brute force, short range braking fast.Now, speed-slackening signal processing unit is accepted lifting unit and is stopped movable signal, and drg 5 is directly braked, in order to avoid smash quenching bath.
But the present invention is not as limit, and the quenching mechanism control system of the embodiment of the present invention, can also comprise two above alternating-current motor/AC motors.The quenching mechanism control system that comprises two above alternating-current motor/AC motors, identical with the 26S Proteasome Structure and Function of control system with the double motor quenching mechanism of the embodiment of the present invention, its something in common repeats no more.Its difference is, the quenching mechanism that comprises two above alternating-current motor/AC motors comprises two above alternating-current motor/AC motors and the resistor identical with alternating-current motor/AC motor quantity by control system, and described in each, resistor is connected to the rotor-side of an alternating-current motor/AC motor in described two above alternating-current motor/AC motors.
In sum, the quenching mechanism control system of the embodiment of the present invention, is used two alternating-current motor/AC motors, and the comparable single motor of descending speed improves 100%, can make lifting unit descending speed of the present invention faster, can meet the requirement of large-tonnage workpiece snap catch.The stator of described two alternating-current motor/AC motors and same direct current speeder are connected in series, the DC current that two motors stator is passed into is identical, can meet the synchronous requirement of two motors, and only need to use a direct current speeder, reduce costs.In addition, the speed that enters quenching bath due to workpiece is high, will improve quenching quality; When monomotor changes into after double motor, car load height reduces, and will reduce factory building cost.
Although described the present invention with reference to above-mentioned allusion quotation shape embodiment, should be appreciated that term used is explanation and exemplary and nonrestrictive term.The spirit or the essence that because the present invention can specifically implement in a variety of forms, do not depart from invention, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in the claim of enclosing, therefore fall into the whole variations in claim or its equivalent scope and change shape and all should be the claim of enclosing and contain.
Claims (6)
1. a quenching mechanism control system, is characterized in that, comprises
At least two alternating-current motor/AC motors; And
A direct current speeder;
Wherein, the stator of described at least two alternating-current motor/AC motors and direct current speeder are connected in series.
2. quenching mechanism control system as claimed in claim 1, is characterized in that, described direct current speeder when described lifting unit declines, the rotating speed of at least two alternating-current motor/AC motors described in control.
3. quenching mechanism control system as claimed in claim 2, it is characterized in that, also comprise AC contactor and be subject to described in the lifting unit of at least two alternating-current motor/AC motor co-controllings, described AC contactor is connected with described at least two alternating-current motor/AC motors, in order to control described two alternating-current motor/AC motor rotating speeds when described lifting unit rises.
4. quenching mechanism control system as claimed in claim 3, is characterized in that, when described lifting unit rises, described AC contactor locks described direct current speeder in non-operating condition.
5. quenching mechanism control system as claimed in claim 4, is characterized in that, also comprises that drg is in order to brake described lifting unit.
6. quenching mechanism control system as claimed in claim 5, is characterized in that, also comprises speed-slackening signal processing unit, in order to accept lifting unit, stops movable signal and controls described drg braking.
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| CN201410329072.0A CN104085793A (en) | 2014-07-10 | 2014-07-10 | Control system of quenching mechanism |
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| CN201410329072.0A CN104085793A (en) | 2014-07-10 | 2014-07-10 | Control system of quenching mechanism |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0347705B1 (en) * | 1988-06-23 | 1993-01-07 | Siemens Aktiengesellschaft | Drive device for a portal traveller |
| DE4238968C1 (en) * | 1992-11-19 | 1994-01-27 | Buehne Werner Abus Kg | Parallel control for lifting mechanism drives - has at least two lifting mechanism drives each with asynchronous motor with pole changeover winding of one of each motor as load winding |
| CN2758729Y (en) * | 2004-12-28 | 2006-02-15 | 浙江工业大学 | Test table for electric eddy speed reducer |
| CN201113907Y (en) * | 2007-06-21 | 2008-09-10 | 深圳市库马克新技术股份有限公司 | Hoisting machine variable-frequency speed-regulating device |
| CN101654208A (en) * | 2009-08-31 | 2010-02-24 | 长沙中联重工科技发展股份有限公司 | Tower crane tandem reactor speed regulating system |
| CN102142799A (en) * | 2011-03-30 | 2011-08-03 | 太原重工股份有限公司 | Silicon controlled rectifier stator voltage-regulation and speed-regulation parallel operation electric control system |
| CN103058061A (en) * | 2012-12-31 | 2013-04-24 | 太原重工股份有限公司 | Quenching crane and bidirectional speed adjusting system thereof |
| CN203617941U (en) * | 2013-11-20 | 2014-05-28 | 宁翠连 | Asynchronous motor with two motors in series connection driven by inverter |
-
2014
- 2014-07-10 CN CN201410329072.0A patent/CN104085793A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0347705B1 (en) * | 1988-06-23 | 1993-01-07 | Siemens Aktiengesellschaft | Drive device for a portal traveller |
| DE4238968C1 (en) * | 1992-11-19 | 1994-01-27 | Buehne Werner Abus Kg | Parallel control for lifting mechanism drives - has at least two lifting mechanism drives each with asynchronous motor with pole changeover winding of one of each motor as load winding |
| CN2758729Y (en) * | 2004-12-28 | 2006-02-15 | 浙江工业大学 | Test table for electric eddy speed reducer |
| CN201113907Y (en) * | 2007-06-21 | 2008-09-10 | 深圳市库马克新技术股份有限公司 | Hoisting machine variable-frequency speed-regulating device |
| CN101654208A (en) * | 2009-08-31 | 2010-02-24 | 长沙中联重工科技发展股份有限公司 | Tower crane tandem reactor speed regulating system |
| CN102142799A (en) * | 2011-03-30 | 2011-08-03 | 太原重工股份有限公司 | Silicon controlled rectifier stator voltage-regulation and speed-regulation parallel operation electric control system |
| CN103058061A (en) * | 2012-12-31 | 2013-04-24 | 太原重工股份有限公司 | Quenching crane and bidirectional speed adjusting system thereof |
| CN203617941U (en) * | 2013-11-20 | 2014-05-28 | 宁翠连 | Asynchronous motor with two motors in series connection driven by inverter |
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Application publication date: 20141008 |