CN115991431B - Crane hydraulic control system - Google Patents
Crane hydraulic control system Download PDFInfo
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- CN115991431B CN115991431B CN202310293477.2A CN202310293477A CN115991431B CN 115991431 B CN115991431 B CN 115991431B CN 202310293477 A CN202310293477 A CN 202310293477A CN 115991431 B CN115991431 B CN 115991431B
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 43
- 238000004146 energy storage Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 9
- 230000002596 correlated effect Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention relates to the field of hydraulic lifting systems, in particular to a hydraulic control system of a crane. The hydraulic pump pumps hydraulic oil into the hydraulic lifting shaft through the hydraulic pipe so as to drive the hydraulic lifting shaft to rotate. The winch wire mechanism is used for driving the cable to reciprocate along the axial direction of the hydraulic lifting shaft when the cable is wound on the hydraulic lifting shaft; when the cable is in an inclined position, the cable is pulled by the winch wire mechanism in the horizontal direction; when the crane lifts an object and the cable is in a vertical position, hydraulic oil pumped by the hydraulic pump flows to the hydraulic reel; when the crane lifts an object and the cable is in an inclined position, hydraulic oil pumped by the hydraulic pump flows to the hydraulic lifting shaft and the hydraulic accumulator. The hydraulic oil pumped by the hydraulic pump partially flows to the hydraulic accumulator for energy storage, so that the energy which is excessive by the hydraulic pump can be recovered.
Description
Technical Field
The invention relates to the field of hydraulic lifting systems, in particular to a hydraulic control system of a crane.
Background
The control system is used for controlling the crane to vertically lift and horizontally carry the heavy objects within a certain range. The most important power source of the existing control system is a hydraulic system. The hydraulic system consists of an oil pump, an oil motor, an oil cylinder, a control valve, an oil tank and the like.
When the existing control system lifts a counterweight, the axial position of a cable on a winch is continuously changed, so that the tension of a winch wire mechanism to the cable is continuously changed, and when the side tension of the winch wire mechanism to the cable is increased, the actual stress of a winch driving system is caused to fluctuate, so that part of energy is wasted.
Disclosure of Invention
The invention provides a hydraulic control system of a crane, which aims to solve the problem of hydraulic energy waste of a hydraulic pump of the existing crane system.
The hydraulic control system of the crane adopts the following technical scheme:
a hydraulic control system of a crane comprises a cable, a hydraulic lifting shaft, a hydraulic pump, a hydraulic accumulator and a winch wire mechanism; the cable is wound on the hydraulic lifting shaft, and the hydraulic pump pumps the hydraulic oil into the hydraulic lifting shaft through the hydraulic pipe so as to drive the hydraulic lifting shaft to rotate; the cable is wound on the lifting shaft and provided with a vertical position and an inclined position; when the cable is in the vertical position, the projection of the cable along the vertical direction is vertical to the hydraulic lifting axis; when the cable is in the inclined position, the projection of the cable along the vertical direction is inclined to the axis of the hydraulic lifting shaft; the winch wire mechanism is used for driving the cable to reciprocate along the axial direction of the hydraulic lifting shaft when the cable is wound on the hydraulic lifting shaft; when the cable is in an inclined position, the cable is pulled by the winch wire mechanism in the horizontal direction; when the crane lifts an object and the cable is in a vertical position, hydraulic oil pumped by the hydraulic pump flows to the hydraulic lifting shaft; when the crane lifts an object and the cable is in an inclined position, hydraulic oil pumped by the hydraulic pump flows to the hydraulic lifting shaft and the hydraulic accumulator.
Further, a crane hydraulic control system further comprises a secondary hydraulic reel; the cable is wound on the auxiliary hydraulic scroll; when the auxiliary hydraulic reel rotates, the counterweight can have upward tension; the hydraulic accumulator can pump hydraulic oil into the auxiliary hydraulic scroll so as to drive the auxiliary hydraulic scroll to rotate; when the diameter of the hydraulic lifting shaft is increased, the hydraulic oil pumped into the auxiliary hydraulic scroll by the hydraulic accumulator in unit time is increased.
When the crane weight is lowered, the auxiliary hydraulic reel is adjusted to be in an oil pumping state, and oil is pumped into the hydraulic accumulator.
Further, when the cable is in the vertical position, the tension of the winch wire mechanism to the cable is zero; when the inclined angle of the cable gradually increases, the tension of the winch wire mechanism to the cable gradually increases, so that the speed of the hydraulic pump pumping the hydraulic oil into the hydraulic accumulator is increased.
Further, the hydraulic jack shaft comprises a hydraulic motor and a jack shaft; the mooring rope is wound on the lifting shaft; the hydraulic motor is connected with the crane and used for driving the lifting shaft to rotate; the hydraulic pump is connected with the hydraulic motor through a hydraulic pipe, and pumps the hydraulic oil into the hydraulic motor so as to start the hydraulic motor.
Further, the hydraulic control system of the crane further comprises a crane frame; the lifting frame is provided with a lifting arm; the lifting shaft can be rotatably arranged on the lifting frame; the auxiliary hydraulic reel is rotatably arranged at the upper end of the lifting arm; an adjusting valve is arranged on a hydraulic pipe between the hydraulic accumulator and the hydraulic pump; the size of the valve is adjusted to control the pumping speed of the hydraulic pump to the hydraulic accumulator.
Further, the hydraulic control system of the crane further comprises an electromagnetic controller; the electromagnetic controller detects the tension of the winch wire mechanism to the cable and controls the opening and closing of the regulating valve; the opening and closing degree of the regulating valve and the pulling force of the winch wire mechanism on the cable are positively correlated.
Further, the hydraulic accumulator is communicated with the auxiliary hydraulic scroll through a hydraulic pipe, and an energy storage valve is arranged on the hydraulic pipe between the hydraulic accumulator and the auxiliary hydraulic scroll; the electromagnetic controller can control the opening and closing of the energy storage valve, and the opening and closing degree of the energy storage valve is positively correlated with the number of layers of the cable wound on the hydraulic lifting shaft.
Further, a pump oil port is arranged on the auxiliary hydraulic scroll; the hydraulic accumulator is communicated with the pump oil port through a hydraulic pipe; the pump oil port is opened when the auxiliary hydraulic scroll reverses, so that hydraulic oil in the auxiliary hydraulic scroll is pumped into the hydraulic accumulator.
The beneficial effects of the invention are as follows: the hydraulic control system of the crane comprises a cable, a hydraulic lifting shaft, a hydraulic pump, a hydraulic accumulator and a winch wire mechanism, wherein the cable is wound on the lifting shaft and has a vertical position and an inclined position. When the crane lifts an object and the cable is in the vertical position, hydraulic oil pumped by the hydraulic pump flows to the hydraulic lifting shaft. The winch wire mechanism does not provide tension to the cable when the cable is in the vertical position. When the crane lifts an object and the cable is in an inclined position, hydraulic oil pumped by the hydraulic pump flows to the hydraulic lifting shaft and the hydraulic accumulator, and the hydraulic oil pumped by the hydraulic pump is partially split by the hydraulic accumulator, so that the tension of a winch wire mechanism and the resultant force of the hydraulic lifting shaft, which are born by the cable, are always kept unchanged, and the stability of lifting the object can be ensured. The hydraulic oil pumped by the hydraulic pump partially flows to the hydraulic accumulator for energy storage, so that the energy which is excessive by the hydraulic pump can be recovered.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of a crane hydraulic control system of the present invention;
FIG. 2 is a top view of an embodiment of a crane hydraulic control system of the present invention;
FIG. 3 is a schematic illustration of the vertical and tilt positions of a cable of an embodiment of a crane hydraulic control system of the present invention;
FIG. 4 is a schematic illustration of the inner and outer positions of a cable of an embodiment of a hydraulic control system for a crane of the present invention;
FIG. 5 is a program flow diagram of an embodiment of a crane hydraulic control system of the present invention;
in the figure: 100. a hoisting frame; 110. a boom; 200. a cable; 210. a vertical position; 220. an inclined position; 230. an inner layer position; 240. an outer layer position; 300. a hydraulic jack shaft; 400. and a secondary hydraulic spool.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of a crane hydraulic control system of the present invention, as shown in fig. 1-5, includes a cable 200, a hydraulic lift shaft 300, a hydraulic pump, a hydraulic accumulator, and a winch wire mechanism. The cable 200 is wound on the hydraulic jack shaft 300, and the hydraulic pump pumps hydraulic oil into the hydraulic jack shaft 300 through the hydraulic pipe so as to drive the hydraulic jack shaft 300 to rotate, and further drive the cable 200 to wind on the hydraulic jack shaft 300, so that the counterweight is lifted. The amount of oil pumped out per unit time and the oil pressure of the hydraulic pump are constant. The hydraulic pump is connected with a hydraulic oil tank, and hydraulic oil of the hydraulic pump is stored in the hydraulic oil tank.
The cable 200 is wound around the crane axis in a position having a vertical position 210 and an inclined position 220 (shown in fig. 3). With the cable 200 in the vertical position 210, the projection of the cable 200 in the vertical direction is perpendicular to the hydraulic lift axis 300. With the cable 200 in the inclined position 220, the projection of the cable 200 in the vertical direction is inclined to the axis of the hydraulic jack shaft 300.
The winch wire mechanism is used for driving the cable 200 to reciprocate along the axial direction of the hydraulic jack 300 when the cable 200 is wound on the hydraulic jack 300, and particularly, enabling the cable 200 to wind along the axial direction of the hydraulic jack 300 when the cable 200 is wound on the hydraulic jack 300, so that the cable is uniformly wound on the hydraulic jack 300. The winch wire mechanism drives the cable 200 to be wound reciprocally on the hydraulic jack shaft 300, which can increase the number of layers of the cable 200 wound on the hydraulic jack shaft 300. When the cable 200 is in the inclined position 220, the cable 200 is pulled horizontally by the winch wire mechanism, specifically, when the cable 200 is positioned on the left side of the hydraulic jack 300 as shown in fig. 3, the cable 200 is inclined to the right, and the winch wire mechanism has a leftward pulling force on the cable 200; when the cable 200 is positioned on the right side of the hydraulic jack 300, the cable 200 is tilted to the left and the winch wire mechanism has a rightward pull on the cable 200. When the cable 200 is subjected to a horizontal pulling force of the winch wire mechanism, the cable 200 is also subjected to a winding pulling force of the hydraulic jack shaft 300.
The crane lifts the object with the cable 200 in the vertical position 210 and the hydraulic oil pumped by the hydraulic pump flows all the way to the hydraulic lift shaft. With the cable 200 in the vertical position 210, the winch wire mechanism does not provide tension to the cable 200. When the crane lifts an object and the cable 200 is at the inclined position 220, hydraulic oil pumped by the hydraulic pump flows to the hydraulic lifting shaft 300 and the hydraulic accumulator, and the hydraulic oil pumped by the hydraulic pump is partially split by the hydraulic accumulator, so that the tension of a winch wire mechanism borne by the cable 200 and the resultant force of the hydraulic lifting shaft 300 are always kept unchanged, and the stability of lifting the object can be ensured. Specifically, when the cable 200 is in the vertical position 210, the tension of the winch wire mechanism on the cable 200 is zero. As the angle at which the cable 200 is tilted becomes progressively greater, the tension of the winch wire mechanism on the cable 200 becomes progressively greater, thereby increasing the rate at which the hydraulic pump pumps hydraulic oil into the hydraulic accumulator.
In this embodiment, as shown in fig. 1 to 4, a crane hydraulic control system further includes a sub hydraulic spool 400; the cable 200 is wound on the auxiliary hydraulic reel 400, and when the auxiliary hydraulic reel 400 rotates, the counterweight has upward tension, and in a normal operating state, the auxiliary hydraulic reel 400 is in a passive rotation state, so that when the cable 200 is wound, the auxiliary hydraulic reel 400 is driven to rotate. The hydraulic accumulator can pump hydraulic oil into the auxiliary hydraulic scroll 400 to drive the auxiliary hydraulic scroll 400 to rotate, and then hydraulic oil stored by the hydraulic accumulator is utilized to drive the auxiliary hydraulic scroll 400 to rotate, so that the auxiliary hydraulic scroll 400 has an auxiliary lifting effect on heavy objects. When the diameter of the cable 200 wound around the hydraulic jack 300 increases, that is, the number of layers of the cable 200 wound around the hydraulic jack 300 increases, the larger the diameter of the cable 200 wound around the hydraulic jack 300 increases, so that the distance between the cable 200 and the axis of the hydraulic jack 300 increases, and the moment between the hydraulic jack 300 and the cable 200 increases. The more layers of the cable 200 are wound on the hydraulic jack shaft 300, the amount of hydraulic oil pumped into the auxiliary hydraulic scroll 400 by the hydraulic accumulator in unit time is increased, so that overload of the hydraulic jack shaft 300 is prevented, and the uniform lifting effect of the hydraulic jack shaft 300 on cargoes is further ensured. The cable 200 is wound around the axle at a location that also has an inner layer location 230 and an outer layer location 240, the cable 200 at the outer layer location 240 being spaced from the axle center of the hydraulic axle 300.
In this embodiment, as shown in fig. 1 to 4, when the crane weight is lowered, the auxiliary hydraulic reel 400 is adjusted to be in an oil pumping state, and oil is pumped into the hydraulic accumulator, and during the lowering of the weight, the auxiliary hydraulic reel 400 rotates in the opposite direction, so that hydraulic oil in the auxiliary hydraulic reel 400 is pumped out into the hydraulic accumulator, and the hydraulic accumulator is thereby made to store energy.
In the present embodiment, as shown in fig. 1 to 4, the hydraulic lift shaft 300 includes a hydraulic motor and a lift shaft. The cable 200 is wound on the lifting shaft, and the hydraulic motor is connected with the crane and used for driving the lifting shaft to rotate. The hydraulic motor is driven by hydraulic pressure, the hydraulic pump is connected with the hydraulic motor through a hydraulic pipe, and the hydraulic pump pumps the hydraulic oil into the hydraulic motor, so that the hydraulic motor is started, and the lifting shaft is driven to rotate. The auxiliary hydraulic reel 400 is connected with an auxiliary hydraulic motor, the auxiliary hydraulic motor drives the auxiliary hydraulic reel 400 to rotate, and the hydraulic accumulator is connected with the auxiliary hydraulic motor and can drive the auxiliary hydraulic motor.
In this embodiment, as shown in fig. 1 to 4, a hydraulic control system for a crane further includes a crane frame 100. The boom 100 is provided with a boom 110, and the hydraulic lift shaft 300 is rotatably provided to the boom 100. The sub-hydraulic spool 400 is rotatably provided at the upper end of the boom 110. An adjusting valve is arranged on a hydraulic pipe between the hydraulic accumulator and the hydraulic pump, and the size of the adjusting valve can control the pumping oil quantity of the hydraulic pump pumped into the hydraulic accumulator in unit time.
In this embodiment, as shown in fig. 1 to 4, a hydraulic control system for a crane further includes an electromagnetic controller; when the winch wire mechanism guides the cable 200 to the left and right ends of the hydraulic spool, the winch wire mechanism has the greatest tension on the cable 200 and the greatest inclination angle of the cable. The electromagnetic controller detects the tension of the winch wire mechanism to the cable 200 and controls the opening and closing degree of the regulating valve, so that when the tension of the winch wire mechanism to the cable 200 is gradually increased, the regulating valve is controlled to be gradually opened, the opening and closing degree of the regulating valve and the tension of the winch wire mechanism to the cable 200 are positively correlated, and the pumping quantity of the hydraulic pump pumped into the hydraulic accumulator in unit time is further controlled. Specifically, when the tension of the winch wire mechanism to the cable 200 is greater than a preset value, the regulating valve is controlled to be gradually opened, and as the tension of the winch wire mechanism to the cable 200 is continuously increased, the opening of the regulating valve is gradually increased. And when the tension of the winch wire mechanism to the cable is smaller than a preset value, controlling the regulating valve to be closed.
In the present embodiment, as shown in fig. 1 to 4, the hydraulic accumulator is communicated with the sub-hydraulic spool 400 through a hydraulic pipe, and an accumulator valve is provided on the hydraulic pipe between the hydraulic accumulator and the sub-hydraulic spool 400. The electromagnetic controller can control the opening and closing degree of the energy storage valve, and the opening and closing degree of the energy storage valve and the number of layers of the cable 200 wound on the hydraulic lifting shaft 300 are positively correlated. Specifically, when the number of layers of the cable 200 wound around the hydraulic jack 300 is greater than a preset number of layers, the accumulator valve is controlled to be opened gradually, and as the number of layers of the cable 200 wound around the hydraulic jack 300 is continuously increased, the opening of the accumulator valve is increased gradually. The auxiliary hydraulic spool 400 is provided with a pump port. The hydraulic accumulator is communicated with the pump oil port through a hydraulic pipe. The pump port is opened when the sub-hydraulic spool 400 is reversed, thereby causing hydraulic oil in the sub-hydraulic spool 400 to be pumped into the hydraulic accumulator.
In operation, when a weight is to be lifted, the hydraulic pump is started, pumps hydraulic oil into the hydraulic jack 300 through the hydraulic pipe, and then rotates the hydraulic jack 300. When the hydraulic jack 300 rotates, the cable 200 is driven to wind on the hydraulic jack 300, so that the weight is driven to lift.
The initial state of the cable 200 under the pulling of the winch wire mechanism is due to being located at the rightmost end of the hydraulic jack shaft 300 (as shown in fig. 3), when the cable 200 is in the rightmost maximum tilt position 220. The winch wire mechanism has the greatest pulling force on the cable 200 in the horizontal direction, and the electromagnetic controller opens the regulating valve to the maximum state when detecting that the cable 200 is pulled by the winch wire mechanism. The hydraulic oil pumped by the hydraulic pump is split by the hydraulic accumulator through the adjusting valve part, so that the hydraulic accumulator can store energy.
During the continuous rotation of the hydraulic jack 300, the winch wire mechanism drives the cable 200 to move leftwards along the axis of the hydraulic jack 300, so that the inclination angle of the inclined position 220 of the cable 200 is gradually reduced, the tension of the winch wire mechanism to the cable 200 is reduced, the opening and closing degree of the regulating valve is correspondingly reduced and adjusted by the electromagnetic controller, and the hydraulic oil pumped into the hydraulic accumulator by the hydraulic pump in unit time is reduced.
When the winch wire mechanism drives the cable 200 to move to the vertical position 210, the tension of the winch wire mechanism to the cable 200 is zero, and the electromagnetic controller completely closes the adjusting valve, so that the hydraulic oil pumped by the hydraulic pump completely enters the hydraulic lifting shaft 300.
The winch wire mechanism continues to drive the cable 200 to move to the left side of the hydraulic lifting shaft 300, so that the cable 200 is positioned at the inclined position 220 again, the inclined angle of the cable 200 is continuously increased along with the driving of the winch wire mechanism, the tension of the cable 200 applied to the winch wire mechanism is gradually increased, and the electromagnetic controller adjusts the regulating valve again according to the tension of the winch wire mechanism to enable the hydraulic accumulator to store energy.
When the winch wire mechanism drives the cable 200 to the leftmost end, the guiding direction of the winch wire mechanism is changed, so that the winch wire mechanism drives the cable 200 to wind towards the right end of the hydraulic jack shaft 300, the number of layers of the cable 200 on the hydraulic jack shaft 300 is increased (as shown in fig. 4), the number of layers of the cable 200 wound on the hydraulic jack shaft 300 is increased, the diameter of the cable 200 wound on the hydraulic jack shaft 300 is increased, the distance between the cable 200 and the axle center of the hydraulic jack shaft 300 is increased, and the moment between the hydraulic jack shaft 300 and the cable 200 is increased. The electromagnetic controller controls the energy storage valve to open, and can control the energy storage valve to open, and the hydraulic pump of the hydraulic energy accumulator is pumped into the auxiliary hydraulic scroll 400, and drives the auxiliary hydraulic scroll 400 to rotate, and the auxiliary hydraulic scroll 400 rotates to provide a certain lifting force for the cable 200, so that overload of the hydraulic lifting shaft 300 is prevented. The degree of opening and closing of the accumulator valve is positively correlated with the number of layers of cable 200 wrapped around hydraulic jack 300.
During the process of lowering the weight, the auxiliary hydraulic reel 400 is driven by the cable 200 to rotate in the opposite direction, so that the hydraulic oil in the auxiliary hydraulic reel 400 is pumped out to the hydraulic accumulator, and the hydraulic accumulator is again used for accumulating energy.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. A crane hydraulic control system, characterized in that: the hydraulic winch comprises a cable, a hydraulic lifting shaft, a hydraulic pump, a hydraulic accumulator and a winch wire mechanism;
the cable is wound on the hydraulic lifting shaft, and the hydraulic pump pumps the hydraulic oil into the hydraulic lifting shaft through the hydraulic pipe so as to drive the hydraulic lifting shaft to rotate;
the cable is wound on the lifting shaft and provided with a vertical position and an inclined position; when the cable is in the vertical position, the projection of the cable along the vertical direction is vertical to the hydraulic lifting axis; when the cable is in the inclined position, the projection of the cable along the vertical direction is inclined to the axis of the hydraulic lifting shaft;
the winch wire mechanism is used for driving the cable to reciprocate along the axial direction of the hydraulic lifting shaft when the cable is wound on the hydraulic lifting shaft; when the cable is in an inclined position, the cable is pulled by the winch wire mechanism in the horizontal direction;
when the crane lifts an object and the cable is in a vertical position, hydraulic oil pumped by the hydraulic pump flows to the hydraulic lifting shaft;
when the crane lifts an object and the cable is in an inclined position, hydraulic oil pumped by the hydraulic pump flows to the hydraulic lifting shaft and the hydraulic accumulator.
2. The crane hydraulic control system according to claim 1, wherein: the auxiliary hydraulic reel is also included;
the cable is wound on the auxiliary hydraulic scroll; when the auxiliary hydraulic reel rotates, the counterweight can have upward tension;
the hydraulic accumulator can pump hydraulic oil into the auxiliary hydraulic scroll so as to drive the auxiliary hydraulic scroll to rotate;
when the diameter of the cable wound on the hydraulic lifting shaft increases, the amount of hydraulic oil pumped into the auxiliary hydraulic reel by the hydraulic accumulator per unit time increases.
3. A crane hydraulic control system according to claim 2, characterized in that:
when the crane weight is lowered, the auxiliary hydraulic reel is adjusted to be in an oil pumping state, and oil is pumped into the hydraulic accumulator.
4. The crane hydraulic control system according to claim 1, wherein:
when the cable is in the vertical position, the tension of the winch wire mechanism to the cable is zero; when the inclined angle of the cable gradually increases, the tension of the winch wire mechanism to the cable gradually increases, so that the speed of the hydraulic pump pumping the hydraulic oil into the hydraulic accumulator is increased.
5. The crane hydraulic control system according to claim 1, wherein:
the hydraulic lifting shaft comprises a hydraulic motor and a lifting shaft; the mooring rope is wound on the lifting shaft; the hydraulic motor is connected with the crane and used for driving the lifting shaft to rotate; the hydraulic pump is connected with the hydraulic motor through a hydraulic pipe, and pumps the hydraulic oil into the hydraulic motor so as to start the hydraulic motor.
6. The crane hydraulic control system as claimed in claim 5, wherein: the lifting frame is also included;
the lifting frame is provided with a lifting arm; the lifting shaft can be rotatably arranged on the lifting frame; the auxiliary hydraulic reel is rotatably arranged at the upper end of the lifting arm; an adjusting valve is arranged on a hydraulic pipe between the hydraulic accumulator and the hydraulic pump; the size of the valve is adjusted to control the pumping speed of the hydraulic pump to the hydraulic accumulator.
7. The crane hydraulic control system as claimed in claim 6, wherein: the electromagnetic controller is also included;
the electromagnetic controller detects the tension of the winch wire mechanism to the cable and controls the opening and closing of the regulating valve; the opening and closing degree of the regulating valve and the pulling force of the winch wire mechanism on the cable are positively correlated.
8. The crane hydraulic control system as claimed in claim 7, wherein:
the hydraulic accumulator is communicated with the auxiliary hydraulic scroll through a hydraulic pipe, and an energy storage valve is arranged on the hydraulic pipe between the hydraulic accumulator and the auxiliary hydraulic scroll; the electromagnetic controller can control the opening and closing of the energy storage valve, and the opening and closing degree of the energy storage valve is positively correlated with the number of layers of the cable wound on the hydraulic lifting shaft.
9. The crane hydraulic control system as claimed in claim 8, wherein:
the auxiliary hydraulic scroll is provided with a pump oil port; the hydraulic accumulator is communicated with the pump oil port through a hydraulic pipe; the pump oil port is opened when the auxiliary hydraulic scroll reverses, so that hydraulic oil in the auxiliary hydraulic scroll is pumped into the hydraulic accumulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310293477.2A CN115991431B (en) | 2023-03-24 | 2023-03-24 | Crane hydraulic control system |
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| CN202310293477.2A CN115991431B (en) | 2023-03-24 | 2023-03-24 | Crane hydraulic control system |
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| CN115991431A CN115991431A (en) | 2023-04-21 |
| CN115991431B true CN115991431B (en) | 2023-05-16 |
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| CN106429843A (en) * | 2016-09-29 | 2017-02-22 | 武汉船用机械有限责任公司 | Wave compensation device and control method |
| WO2019243302A1 (en) * | 2018-06-19 | 2019-12-26 | Mm Forsttechnik Gmbh | Universal carriage with enforced spooling out of the traction cable and/or of the hoisting cable in 2- and 3-cable operation |
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| CN115991431A (en) | 2023-04-21 |
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Denomination of invention: A hydraulic control system for cranes Granted publication date: 20230516 Pledgee: Jining Rural Commercial Bank Co.,Ltd. Pledgor: JINING SITONG ENGINEERING MACHINERY Co.,Ltd. Registration number: Y2024980000926 |
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