CN202575740U - Low speed rotation control system of crane - Google Patents
Low speed rotation control system of crane Download PDFInfo
- Publication number
- CN202575740U CN202575740U CN 201220235167 CN201220235167U CN202575740U CN 202575740 U CN202575740 U CN 202575740U CN 201220235167 CN201220235167 CN 201220235167 CN 201220235167 U CN201220235167 U CN 201220235167U CN 202575740 U CN202575740 U CN 202575740U
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- low speed
- electric current
- control system
- rotovalve
- controller
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Abstract
The utility model discloses a low speed rotation control system of a crane, which relates to the technical field of cranes. The low speed rotation control system for the crane comprises a rotating valve, a rotating motor, a rotating speed reducer, an angle detecting device and a controller. Through the adoption of the low speed rotation control system of the crane disclosed by the utility model, manual operation of an operator is not needed; as low speed rotating currents are accumulated, problems of overlarge low speed rotating current and too fast low-speed rotation can be avoided, and high low-speed rotating current setting accuracy is achieved; possible manual setting errors are avoided and high low-speed rotating current setting accuracy is achieved; and repeated correction of rotating speed is not needed and higher counterweight hanging efficiency is achieved.
Description
Technical field
The utility model relates to the hoisting crane technical field, relates in particular to a kind of hoisting crane low speed rotary control system.
Background technology
Rubber tired crane is a kind ofly to be installed in the Full Rotary hoisting crane on the special chassis that scale-up version tire and wheel shaft form to hoisting crane.Rubber tired crane realizes that through swing type mechanism hoisting crane turns round operation in horizontal surface usually.
Please referring to Fig. 1, Fig. 2, Fig. 1 is a kind of structural representation of swing type mechanism of representative type hoisting crane; Fig. 2 be among Fig. 1 A to structural representation.
Like Fig. 1, shown in Figure 2; The swing type mechanism of rubber tired crane generally includes pivoting support 3, rotary reducer 1, rotary motor 2, rotovalve, controller etc.; The big base plate of turntable of hoisting crane hoisting operation part is axially fixed in the external toothing or the internally toothed annulus top of pivoting support 3; The internally toothed annulus of pivoting support 3 or external toothing are fixed on chassis frame top, and the internally toothed annulus of pivoting support 3 and external toothing can axial rotation; Rotary reducer 1 is fixed on the big base plate of turntable, external toothing (or internally toothed annulus) engagement of its output gear shaft and pivoting support 3; Rotary motor 2 is through the gear mesh transferring power of rotary reducer 1 with pivoting support 3; Pull the interior control handle 5 of control cabin in different angles; Controller receives the operation signal of control handle 5 outputs in real time; And to the corresponding current signal that turns round of the control end output of rotovalve; Control rotovalve aperture is with control rotary motor 2 oil inlet quantities, thereby realization is through the speed of control handle 5 control revolution actions.
If run into different lifting operating modes, need low speed revolution turntable to come the dismounting counterweight.Be provided with low speed revolution rotor switch at the vehicle body rear, pull this switch, the fixing low speed revolution electric current of controller output is given rotary magnetic valve, realizes the low speed revolution.Before hoisting crane dispatches from the factory; Usually pre-set low speed revolution electric current; Yet when hoisting crane dispatches from the factory and the long hoisting operation of process; Cause work fluid viscosity to increase because of operating temperature reduces or mixes reason such as impurity, produce bigger loss of pressure at the restriction place, can frequent appearance can't the rotating phenomenon of low speed.Thereby need suitably this moment, and increase low speed turns round electric current.
For solve because of the fluid viscosity increases can't the rotating phenomenon of low speed; In the prior art; Usually the scheme that adopts is: user oneself is through pressing the key assignments current value; As shown in Figure 3, telltale 1 ' shows low speed revolution current value, through the size that button 2 ' is regulated low speed revolution electric current that is provided with of telltale 1 ' below.
Adopt technique scheme, need set low speed revolution electric current artificially, have following problem: be arranged in the control cabin usually owing to set the button and the telltale of current value; Low speed revolution electric current is set if desired, needs the staff to get into control cabin and change, thereby make inconvenient operation; And manual work that the current value accuracy is set is lower, if the current value that is provided with is bigger, can cause the low speed revolution too fast; Also need ceaselessly revise speed of revolutions, influence articulates the efficient of counterweight.
In addition; When power-off restarting, the rising of power fluid liquid temp, viscosity reduce under the new operating mode, and the low speed revolution electric current after manual work is provided with will be excessive relatively; Will cause the low speed speed of revolutions excessive; Excessive in order to prevent the low speed speed of revolutions, need manual work to be provided with low speed is turned round electric current to return to the electric current that dispatches from the factory, operation is inconvenient.
Therefore, when needing low speed revolution operation, how to set required low speed revolution electric current efficiently and accurately, just become the problem that those skilled in the art need solution badly.
The utility model content
The purpose of the utility model provides a kind of hoisting crane low speed rotary control system, and when needs low speed revolution operation, this hoisting crane low speed rotary control system can be set required low speed revolution electric current efficiently and accurately.
To achieve these goals, the utility model provides a kind of hoisting crane low speed rotary control system, comprises rotovalve, rotary motor, rotary reducer, also comprises:
Angle detection device is used to detect the rotating platform of crane degreeof turn, and the degreeof turn signal is sent to controller;
Controller is used to receive said degreeof turn signal, and turns round current signal to the control end input of rotovalve; Controller control rotovalve is with preset low speed revolution current start; If detected degreeof turn is less than or equal to threshold values, the control end that controller the is controlled said rotovalve low speed revolution electric current that adds up; If detected degreeof turn is greater than threshold values, then the controller low speed revolution electric current of controlling the control end of said rotovalve remains unchanged.
Preferably, said preset low speed revolution electric current is the Default Value electric current.
Preferably, if the said low speed revolution electric current after adding up then adopts preset maximum low speed revolution electric current to turn round electric current as low speed greater than preset maximum low speed revolution electric current.
Preferably, said angle detection device is the degreeof turn coder.
Preferably, said angle detection device is installed on the center of gyration position of rotating platform of crane.
Preferably, said rotovalve is an electromagnetic proportional valve, and the control signal output ends of said controller is connected with the control end of said electromagnetic proportional valve.
The hoisting crane low speed rotary control system that the utility model provides comprises rotovalve, rotary motor, rotary reducer, angle detection device, controller.Operating personal can be through pulling low speed revolution rotor switch, and controller control rotovalve is with preset low speed revolution current start; Detect the anglec of rotation of turntable through angle detection device, and the degreeof turn signal is sent to controller, controller control rotovalve is with preset low speed revolution current start; If detected degreeof turn is less than or equal to threshold values; The control end that controller the is controlled said rotovalve low speed revolution electric current that adds up; Increase the rotovalve aperture,, and then improve the propulsive effort of rotary reducer driving rotational supporting with the oil-feed flow of increase rotary motor; If detected degreeof turn is greater than threshold values, then the controller low speed revolution electric current of controlling the control end of said rotovalve remains unchanged.
Through this hoisting crane low speed rotary control system, need not the operating personal M/C, because low speed revolution electric current for adding up, the problem that low speed revolution electric current is excessive, the low speed revolution is too fast can not occur, low speed revolution electric current is provided with the accuracy height; Avoided the artificial mistake that possibly occur that is provided with, low speed revolution electric current is provided with the accuracy height; Do not need to revise speed of revolutions repeatedly, the efficient that articulates counterweight is higher.
Description of drawings
Fig. 1 is a kind of structural representation of swing type mechanism of representative type hoisting crane;
Fig. 2 be among Fig. 1 A to structural representation;
Fig. 3 is through pressing the scheme drawing of key assignments current value in the prior art;
Fig. 4 is the principle schematic of a kind of specific embodiment of the hoisting crane low speed rotary control system that the utility model provided;
The specific embodiment
In order to make those skilled in the art better understand the technical scheme of the utility model, the utility model is done further to specify below in conjunction with the accompanying drawing and the specific embodiment.
Please refer to Fig. 4 and combine Fig. 1, Fig. 2, Fig. 4 is the principle schematic of a kind of specific embodiment of the hoisting crane low speed rotary control system that the utility model provided.
Hoisting crane low speed rotary control system as shown in Figure 4, that the utility model provided comprises rotovalve, rotary motor 2, rotary reducer 1, angle detection device, controller 6.
Wherein, Rotary motor 2 can be through the gear mesh transferring power of rotary reducer 1 with pivoting support 3; In the concrete scheme; The internally toothed annulus of pivoting support 3 or external toothing are fixed on chassis frame top, and the internally toothed annulus of pivoting support 3 and external toothing can axial rotation, and the big base plate of turntable of hoisting crane hoisting operation part is axially fixed in above the external toothing or internally toothed annulus of pivoting support 3.
To rotary motor 2 power is provided by propulsion source 9, in the concrete scheme, propulsion source 9 is generally hydraulic oil pump, and the hydraulic oil with certain pressure is provided by hydraulic oil pump; For the flow of controlling the hydraulic oil that gets into rotary motor 2 and the hand of rotation of controlling rotary motor 2; On the oil circuit between hydraulic oil pump and the rotary motor 2, be provided with rotovalve; Rotovalve is selected electromagnetic proportional valve 7 usually for use; The oil inlet of rotovalve is communicated with the oil outlet of said hydraulic oil pump, and two oil outlets of said rotovalve are communicated with oil inlet, the oil outlet of rotary motor 2 respectively, and the control end of rotovalve is connected with the control signal output ends of controller 6.
In the preferred version,, make on the oil circuit between rotovalve and the rotary motor 2, also to be provided with cushion valve 8 by the stability of flow that gets into the hydraulic oil in the rotary motor 2 for balanced system pressure.
Angle detection device is used to detect the rotating platform of crane degreeof turn, and the degreeof turn signal is sent to controller 6.In the concrete embodiment; Angle detection device can adopt degreeof turn coder 4, and degreeof turn coder 4 can be gathered the angle of turntable with respect to the vehicle frame working direction, and the rotating platform of crane initial position is a1 with respect to the angle of vehicle frame working direction; Behind the time t0; Rotating platform of crane is a2 with respect to the angle of vehicle frame working direction, and degreeof turn a is the size of the rotational angle of rotating platform of crane, and then degreeof turn a is a2-a1.
In the preferred scheme, as shown in Figure 1, angle detection device can be installed on the center of gyration position of rotating platform of crane.
Consider factors such as measured error, signal fluctuation, the threshold values of the aa of certain angle size as low speed revolution action can be set in advance,, then show partly not action of hoisting operation, need to increase low speed revolution electric current if degreeof turn a is less than or equal to threshold values aa; Part has been turned round action if degreeof turn a, then shows hoisting operation greater than threshold values aa, need not increase low speed revolution electric current.
If need to increase low speed revolution electric current, can be on the basis of preset low speed revolution electric current, rotary magnetic valve electric current automatically adds up; The low speed that here adds up revolution electric current is specially, and increases small electric flow di at every turn; Behind the segment pitch time, increase small electric flow di again, and the like.In this application, each small electric flow di that increases can be a definite value, also can be a variable, and preferably, each small electric flow di that increases can improve adjustment efficient like this for the variable that increases gradually.
In the preferred version, controller 6 may command rotovalves are with the Default Value current start.When power-off restarting; Adopt the Default Value electric current as low speed revolution current start rotovalve; Even the power fluid liquid temp rises under the new operating mode after restarting, viscosity reduces; Can not cause the low speed speed of revolutions excessive yet, not need manual work to be provided with low speed is turned round electric current to return to the electric current that dispatches from the factory, make easy and simple to handle.
Further in the scheme; Also comprise control handle 5; Control handle 5 can be arranged in the OPS, the operation signal of control handle 5 exportable expression rotating platform of crane left side revolutions or right-hand rotation, and controller 6 receives the operation signal of control handle 5 outputs in real time; And to the corresponding revolution of the corresponding controling end of rotovalve output current signal (as: if left side revolution, then the Y1 of change-over valve add up electricly automatically, the Y2 zero clearing; If right-hand rotation, then the Y2 of change-over valve add up electricly automatically, Y 1 zero clearing); And then control rotary motor 2 advances the left-hand rotation or the right side rotates, thereby realize through revolution of a rotating platform of crane left side or right-hand rotation.To different angles, can also control the speed of revolution action through Spin Control handle 5.
In the preferred version, if the revolution electric current of the low speed after adding up is if turn round electric current greater than preset maximum low speed, 6 of controllers adopt preset maximum low speed revolution electric current to turn round electric current as low speed, in case the non-return rotary speed is too fast.
The hoisting crane low speed rotary control system that the utility model provides comprises rotovalve, rotary motor 2, rotary reducer 1, angle detection device, controller 6.Operating personal can be through pulling low speed revolution rotor switch, and controller 6 control rotovalves are with preset low speed revolution current start; Detect the anglec of rotation of turntable through angle detection device, and the degreeof turn signal is sent to controller 6, controller 6 control rotovalves are with preset low speed revolution current start; If detected degreeof turn is less than or equal to threshold values; The control end of the said rotovalve of the controller 6 control low speed revolution electric current that adds up; Increase the rotovalve aperture,, and then improve the propulsive effort of rotary reducer 1 driving rotational supporting 3 with the oil-feed flow of increase rotary motor 2; If detected degreeof turn is greater than threshold values, then the low speed revolution electric current of the control end of the said rotovalve of controller 6 controls remains unchanged.
Through this hoisting crane low speed rotary control system, need not the operating personal M/C, because low speed revolution electric current for adding up, the problem that low speed revolution electric current is excessive, the low speed revolution is too fast can not occur, low speed revolution electric current is provided with the accuracy height; Avoided the artificial mistake that possibly occur that is provided with, low speed revolution electric current is provided with the accuracy height; Do not need to revise speed of revolutions repeatedly, the efficient that articulates counterweight is higher.
More than a kind of hoisting crane low speed rotary control system that the utility model provided has been carried out detailed introduction.Used concrete example among this paper the principle and the embodiment of the utility model are set forth, the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the utility model.Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (6)
1. a hoisting crane low speed rotary control system comprises rotovalve, rotary motor, rotary reducer, it is characterized in that, also comprises:
Angle detection device is used to detect the rotating platform of crane degreeof turn, and the degreeof turn signal is sent to controller;
Controller is used to receive said degreeof turn signal, and turns round current signal to the control end input of said rotovalve; Said controller is controlled said rotovalve with preset low speed revolution current start; If detected degreeof turn is less than or equal to threshold values, the control end that said controller the is controlled said rotovalve low speed revolution electric current that adds up; If detected degreeof turn is greater than threshold values, the low speed revolution electric current that then said controller is controlled the control end of said rotovalve remains unchanged.
2. hoisting crane low speed rotary control system according to claim 1 is characterized in that, said preset low speed revolution electric current is the Default Value electric current.
3. hoisting crane low speed rotary control system according to claim 1 is characterized in that, if the said low speed revolution electric current after adding up then adopts preset maximum low speed revolution electric current to turn round electric current as low speed greater than preset maximum low speed revolution electric current.
4. according to each described hoisting crane low speed rotary control system of claim 1 to 3, it is characterized in that said angle detection device is the degreeof turn coder.
5. hoisting crane low speed rotary control system according to claim 4 is characterized in that said angle detection device is installed on the center of gyration position of rotating platform of crane.
6. hoisting crane low speed rotary control system according to claim 1 is characterized in that said rotovalve is an electromagnetic proportional valve, and the control signal output ends of said controller is connected with the control end of said electromagnetic proportional valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220235167 CN202575740U (en) | 2012-05-22 | 2012-05-22 | Low speed rotation control system of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220235167 CN202575740U (en) | 2012-05-22 | 2012-05-22 | Low speed rotation control system of crane |
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| Publication Number | Publication Date |
|---|---|
| CN202575740U true CN202575740U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220235167 Expired - Lifetime CN202575740U (en) | 2012-05-22 | 2012-05-22 | Low speed rotation control system of crane |
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| CN (1) | CN202575740U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674157A (en) * | 2012-05-22 | 2012-09-19 | 徐州重型机械有限公司 | Low-speed rotary control method and system for cranes |
| CN103527073A (en) * | 2013-10-23 | 2014-01-22 | 福田雷沃国际重工股份有限公司 | Rotation controlling hydraulic circuit system for rotary drilling rig |
| CN114198369A (en) * | 2021-12-21 | 2022-03-18 | 中联恒通机械有限公司 | Control method and control system for swing mechanism |
-
2012
- 2012-05-22 CN CN 201220235167 patent/CN202575740U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674157A (en) * | 2012-05-22 | 2012-09-19 | 徐州重型机械有限公司 | Low-speed rotary control method and system for cranes |
| CN102674157B (en) * | 2012-05-22 | 2013-12-11 | 徐州重型机械有限公司 | Low-speed rotary control method and system for cranes |
| CN103527073A (en) * | 2013-10-23 | 2014-01-22 | 福田雷沃国际重工股份有限公司 | Rotation controlling hydraulic circuit system for rotary drilling rig |
| CN103527073B (en) * | 2013-10-23 | 2016-06-01 | 雷沃重工股份有限公司 | Rotary drilling rig control revolution hydraulic circuit system |
| CN114198369A (en) * | 2021-12-21 | 2022-03-18 | 中联恒通机械有限公司 | Control method and control system for swing mechanism |
| CN114198369B (en) * | 2021-12-21 | 2024-02-27 | 中联恒通机械有限公司 | Control method and control system for slewing mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20131211 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20131211 |
|
| RGAV | Abandon patent right to avoid regrant |