CN204324783U - A kind of system system and hoisting crane - Google Patents
A kind of system system and hoisting crane Download PDFInfo
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- CN204324783U CN204324783U CN201420715760.6U CN201420715760U CN204324783U CN 204324783 U CN204324783 U CN 204324783U CN 201420715760 U CN201420715760 U CN 201420715760U CN 204324783 U CN204324783 U CN 204324783U
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Abstract
The utility model relates to a kind of system system and hoisting crane, and system turnkey draws together hoist motor, change-over valve and hoist brake; First actuator port of change-over valve is connected to the opening of hoist motor, the mouth that falls that the second actuator port is connected to hoist motor, oil inlet be connected to drive oil circuit, return opening is connected to oil return circuit, change-over valve for controlling the opening of hoist motor, the mouth that falls is communicated with driving oil circuit or oil return circuit respectively; When hoist brake is opened, hoist motor brake off; When hoist brake is locked, braking is implemented to hoist motor.The system system that the utility model provides increases brake circuit, improves and has surpassed system security reliability; When super lift winch is in unblock, utilize hoist brake can prevent because having surpassed the stall event placed for a long time and cause.
Description
Technical field
The utility model relates to technical field of engineering machinery, is specifically related to a kind of system system and hoisting crane.
Background technology
Stall refers to: motor is due to outer load effect, and rotating speed is uncontrolled, occurs the phenomenon accelerating to rotate.Repairing refers to: when the direction that motor bears load moment and motor turn to consistent time, owing to leak and load drives motor to accelerate to rotate, cause motor oil-feed side for shortage of oil, now separately connect an oil circuit to make up delivery quality deficiency.
Along with the large scale development of construction project, hoisting crane is increasingly to the future development maximized, and technical personnel ensures the property indices of hoisting crane by the technological means such as length, lifting altitude improving crane arm.In order to the situation of the lift heavy performance of the main crane arm of the excessive impact of the amount of deflection improving main crane arm, thus introduce super lifting device.
On hoister in large tonnage, super lifting device is as one of the important mechanism of improving product lifting performance, and the stability of its work and safety directly affect safety and the life cycle of complete machine.By using super lifting device, adding the lift heavy performance of principal arm medium and long distance, when adjusting principal arm operating mode, needing to have surpassed locking oil cylinder and retracting, and then making super lift winch be in released state.When having surpassed oil circuit for shortage of oil, under the outer year moment loadings such as steel rope, just may occur stall event, the lighter has caused super lifting device to destroy, and severe one causes the Accident of Large-scale of car crash.
The length needs having surpassed steel rope do corresponding adjustment according to the change of arm brachium, to keep its mode of operation, during contracting arm, control revolution, along with steel rope is involved in reel by arm retraction speed; In this process, in order to enable steel rope tight around on reel, need the reactive torque that hoist motor provides certain.When arm bounces back, hoist motor is inwardly involved in and has surpassed steel rope, when spool velocity is slightly larger than contracting arm speed, can ensure the existence of reactive torque.During semi-girder, chamber, hoist motor left and right is communicated with makes it be in quick condition, and having surpassed steel rope outwards can release along with arm protracts; But, because lift winch super under this state is in quick condition, when arm is when stretching out to a certain degree, the deadweight having surpassed steel rope will drive super lift winch to move, now need motor to provide certain reactive torque to offset the deadweight of steel rope, can leak away owing to placing hydraulic oil in motor shell for a long time, or normal repairing cannot be carried out to hoist motor in motion process, hoist motor one chamber then can be caused to form negative pressure, cause stall event.
For overcoming this problem, prior art usually opens at motor and arranges a back pressure valve to reduce the possibility of motor stall.But back pressure valve cannot ensure zero leakage, namely hoist motor lays up for a long time, and hydraulic fluid leak to be caused in motor shell and pipeline in fuel tank, make steel rope when drawing motor moves, motor because do not have enough hydraulic oil to provide corresponding moment of torsion, thus causes stall.
Existing super lift winch hydraulic efficiency pressure system has following shortcoming: 1, brakeless loop, and safe reliability is low; 2, when unlocking suddenly after super lift winch is placed for a long time, elevator, without other safety precautions, has the risk of stall.
Utility model content
The utility model provides a kind of system to unite and hoisting crane, and main purpose of the present utility model improving the reliability of super lift winch by increasing hoist brake, effectively avoiding the generation of stall event, increasing and surpassed the safety of work.
For achieving the above object, the utility model provides following technical scheme:
A system system, comprises hoist motor, change-over valve and hoist brake;
First actuator port of change-over valve is connected to the opening of hoist motor, the mouth that falls that the second actuator port is connected to hoist motor, oil inlet be connected to drive oil circuit, return opening is connected to oil return circuit, change-over valve for controlling the opening of hoist motor, the mouth that falls is communicated with driving oil circuit or oil return circuit respectively; When hoist brake is opened, hoist motor brake off; When hoist brake is locked, braking is implemented to hoist motor.
According to an embodiment of the present utility model, further, system system also comprises brake control valve, and brake control valve is for controlling the unlatching of hoist brake and locked.
According to an embodiment of the present utility model, further, hoist brake is connected to driving oil circuit and overflow oil circuit by braking operation oil circuit via brake control valve.
According to an embodiment of the present utility model, further, brake control valve is two position three way directional control valve, the actuator port of two position three way directional control valve is connected to braking operation oil circuit, oil inlet is connected to driving oil circuit, return opening is connected to overflow oil circuit, by the commutation of two position three way directional control valve, braking operation oil circuit is optionally communicated with driving oil circuit or overflow oil circuit.
According to an embodiment of the present utility model, further, the rod chamber of hoist brake is connected to the actuator port of brake control valve by braking operation oil circuit.
According to an embodiment of the present utility model, further, system system also comprises pressure valve, and the oil inlet of pressure valve is communicated with driving oil circuit, oil outlet is communicated with the oil inlet of brake control valve.
According to an embodiment of the present utility model, further, pressure valve comprises damping plug, reducing valve and by pass valve, the oil inlet of damping plug is communicated with driving oil circuit, oil outlet is communicated with the oil inlet of reducing valve, the oil outlet of reducing valve is communicated with the oil inlet of brake control valve, the oil inlet of by pass valve respectively, and the oil outlet of by pass valve is communicated with overflow oil circuit.
According to an embodiment of the present utility model, further, reducing valve and by pass valve will drive the pressure of oil circuit to 2.5MPa.
According to an embodiment of the present utility model, further, change-over valve is three-position four-way electromagnetic directional valve.
The utility model additionally provides following technical scheme:
A kind of hoisting crane, hoisting crane comprises system as above system.
Based on the arbitrary technical scheme in technique scheme, the utility model embodiment at least can produce following technique effect:
Because system turnkey provided by the utility model draws together hoist motor, change-over valve and hoist brake; First actuator port of change-over valve is connected to the opening of hoist motor, the mouth that falls that the second actuator port is connected to hoist motor, oil inlet be connected to drive oil circuit, return opening is connected to oil return circuit, change-over valve for controlling the opening of hoist motor, the mouth that falls is communicated with driving oil circuit or oil return circuit respectively; When hoist brake is opened, hoist motor brake off; When hoist brake is locked, braking is implemented to hoist motor, increase brake circuit, improve and surpassed system security reliability; When super lift winch is in unblock, utilize hoist brake can prevent because having surpassed the stall event placed for a long time and cause.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the principle schematic of system of the present utility model system;
Fig. 2 is the principle schematic of pressure valve of the present utility model.
Detailed description of the invention
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
It should be noted that: any technical characteristic in the present embodiment, any technical scheme is all one or more in the technical characteristic of plurality of optional or optional technical scheme, cannot exhaustive all alternative technical characteristics of the present utility model and alternative technical scheme in order to describe succinct to need in presents, also the embodiment being not easy to each technical characteristic all emphasizes that it is one of optional numerous embodiments, so those skilled in the art should know: any technical characteristic in the present embodiment and any technical scheme all do not limit protection domain of the present utility model, protection domain of the present utility model should comprise those skilled in the art and not pay the thinkable any alternate embodiments of creative work.
Hereafter convenient in order to describe, hereinafter alleged "left", "right", " on ", left and right, the upper and lower of D score and accompanying drawing itself is to consistent.
As shown in Figure 1, the utility model provides a kind of system system, can comprise hoist motor 1, change-over valve 2 and hoist brake 3;
The A that opens, the second actuator port B1 that first actuator port A1 of change-over valve 2 is connected to hoist motor 1 are connected to mouthful B that falls of hoist motor 1, oil inlet be connected to drive oil circuit P, return opening is connected to oil return circuit T, change-over valve 2 for controlling the A that opens of hoist motor 1, mouthful B that falls is communicated with driving oil circuit P or oil return circuit T respectively; When hoist brake 3 is opened, hoist motor 1 brake off; When hoist brake 3 is locked, braking is implemented to hoist motor 1.
Change-over valve 2 for controlling the A that opens of hoist motor 1, mouthful B that falls is communicated with refers to driving oil circuit P or oil return circuit T respectively: when change-over valve 2 is positioned at and illustrates left position, namely when Y28a obtains electric, drive oil circuit P to be communicated with mouthful B that falls of hoist motor 1, oil return circuit T is communicated with the A that opens of hoist motor 1; When change-over valve 2 is positioned at diagram right position, when namely Y28b obtains electric, drive oil circuit P to be communicated with the A that opens of hoist motor 1, oil return circuit T is communicated with mouthful B that falls of hoist motor 1; In order to ensure security and stability during super lift winch off working state, change-over valve 2 has the non-conduction control position of meta.
During contracting arm, the Y28b of change-over valve 2 obtains electric, the A oil-feed that opens of hoist motor 1, and fall a mouthful B oil return, stay cord before hoist motor 1 is inwardly involved in and has surpassed.In the process, tight around on reel in order to enable to have surpassed front stay cord, need the counter torque that hoist motor provides certain.When crane arm bounces back, stay cord before hoist motor is inwardly involved in and has surpassed, when spool velocity is slightly larger than contracting arm speed, can ensure the existence of counter torque.
During semi-girder, the Y28a of change-over valve 2 obtains electric, and the chamber, left and right of hoist motor 1 is communicated with, and is in quick condition, and before having surpassed, stay cord can protract with crane arm and outwards release; But because now hoist motor is in quick condition, when crane arm reaches to a certain degree, the deadweight of stay cord will drive super lift winch move before having surpassed, hoist motor is now needed to provide certain counter torque to offset the deadweight having surpassed front stay cord.
System system increases hoist brake brake circuit, improves and has surpassed system security reliability; When super lift winch is in unblock, utilize hoist brake can prevent because having surpassed the stall event placed for a long time and cause.
It should be noted that, the mode of operation of the super lift winch that the A that opens of the hoist motor mentioned by the application, mouthful B that falls drive based on this hoist motor 1 is that benchmark defines, that is, oil circuit P is driven to be communicated with the A that opens of hoist motor 1, then super lift winch does inside serving action, drive oil circuit P to be communicated with mouthful B that falls of hoist motor 1, then super lift winch outwards puts rope action.
In a specific embodiment of the present utility model, system system can also comprise brake control valve 4, and brake control valve 4 is for controlling the unlatching of hoist brake 3 and locked.
In a specific embodiment of the present utility model, hoist brake 3 can be connected to driving oil circuit P and overflow oil circuit L by braking operation oil circuit via brake control valve 4.
In a specific embodiment of the present utility model, brake control valve 4 can be two position three way directional control valve, the actuator port of two position three way directional control valve is connected to braking operation oil circuit, oil inlet is connected to driving oil circuit P, return opening is connected to overflow oil circuit L, by the commutation of two position three way directional control valve, braking operation oil circuit is optionally communicated with driving oil circuit P or overflow oil circuit L.
When brake control valve 4 obtains electric, hoist brake 3 is in opening, and hoist motor 1 can realize normal work.When hoisting crane normally works, when super lift winch is in mechanical release state, now hoist brake 3 is in locking state, only has when 1 action of super lift winch motor, hoist brake 3 is just in released state, just can prevent because placing the phenomenons such as the motor stall that causes for a long time.
In a specific embodiment of the present utility model, the rod chamber of hoist brake 3 can be connected to the actuator port of brake control valve 4 by braking operation oil circuit.
At braking operation oil circuit not under the state of the rod chamber supply hydraulic fluid of hoist brake 3, stretch out under the effect of the retracing spring of piston rod in the rodless cavity of hoist brake 3 of hoist brake 3 and braking is implemented to hoist motor 1; Under the state of braking operation oil circuit to the rod chamber supply hydraulic fluid of hoist brake 3, the piston rod of hoist brake 3 overcomes the resistance of retracing spring and retracts under the driving of hydraulic oil, thus brake off state.
In a specific embodiment of the present utility model, system system can also comprise pressure valve 5, and the oil inlet of pressure valve 5 is communicated with driving oil circuit P, oil outlet is communicated with the oil inlet of brake control valve 4.
The effect of pressure valve 5 gets high pressure oil from driving oil circuit P to reduce pressure afterwards, for hoist brake 3.Pressure valve 5 also can stablize hoist brake 3 control-oil pressure by limited flow, makes brake circuit safe and reliable.
In a specific embodiment of the present utility model, as shown in Figure 2, pressure valve 5 can comprise damping plug 6, reducing valve 7 and by pass valve 8, the oil inlet of damping plug 6 is communicated with driving oil circuit P, oil outlet is communicated with the oil inlet of reducing valve 7, the oil outlet of reducing valve 7 is communicated with the oil inlet of brake control valve 4, the oil inlet of by pass valve 8 respectively, and the oil outlet of by pass valve 8 is communicated with overflow oil circuit L.
The Main Function of damping plug 6 is that restriction flows through the flow of pressure valve 5 and the delivery pressure of steady pressure valve 5, and brake circuit oil supply pressure is stablized.The effect of reducing valve 7 and by pass valve 8 will drive the pressure of oil circuit P thus provide pressure oil-source for hoist brake 3.
In a specific embodiment of the present utility model, reducing valve 7 and by pass valve 8 can will drive the pressure of oil circuit P to 2.5MPa.
In a specific embodiment of the present utility model, change-over valve 2 can be three-position four-way electromagnetic directional valve.
It should be noted that: a hoist motor, a corresponding change-over valve, a hoist brake and a brake control valve can be set in system system, two hoist motors, two corresponding change-over valves, two hoist brakes and two brake control valves also can be set, two or more hoist motor, corresponding two or more change-over valve, two or more hoist brake and two or more brake control valve can also be set.
The utility model additionally provides a kind of hoisting crane, and hoisting crane can comprise system system as above.
Because above-mentioned system system has above-mentioned technique effect, the hoisting crane with this system system also has identical technique effect.
The other parts of hoisting crane can, with reference to prior art, no longer be launched to describe herein.
Above-mentioned arbitrary technical scheme disclosed in the utility model unless otherwise stated, if the number range of it discloses, so disclosed number range is preferred number range, anyly it should be appreciated by those skilled in the art: preferred number range is only the numerical value that in many enforceable numerical value, technique effect is obvious or representative.Because numerical value is more, cannot be exhaustive, so the utility model just discloses component values with casehistory the technical solution of the utility model, and the above-mentioned numerical value enumerated should not form restriction the utility model being created to protection domain.
If employ the word such as " first ", " second " herein to limit parts, those skilled in the art should know: the use of " first ", " second " is only used to be convenient to describe carry out difference as not having outside Stated otherwise to parts, the implication that above-mentioned word is not special.
Simultaneously, if above-mentioned the utility model discloses or relate to parts or the framing member of connection fastened to each other, so, unless otherwise stated, be fixedly connected with and can be understood as: can releasably be fixedly connected with (such as using bolt or screw to connect), also can be understood as: to be non-removablely fixedly connected with (such as rivet, weld), certainly, connection fastened to each other also can be replaced by integral type structure (such as use foundry technique is integrally formed create) (obviously cannot adopt except integrally formed technique).
In addition, apply in arbitrary technical scheme disclosed in above-mentioned the utility model for represent position relationship or shape term unless otherwise stated its implication comprise approximate with it, similar or close state or shape.Arbitrary parts that the utility model provides both can be assembled by multiple independent component part, and also can be one of the forming manufacture technics separate part out.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (10)
1. a system system, is characterized in that:
Comprise hoist motor (1), change-over valve (2) and hoist brake (3);
The mouth that falls (B) that first actuator port (A1) of change-over valve (2) is connected to open (A) of hoist motor (1), the second actuator port (B1) is connected to hoist motor (1), oil inlet are connected to and drive oil circuit (P), return opening is connected to oil return circuit (T), and change-over valve (2) is communicated with driving oil circuit (P) or oil return circuit (T) respectively for controlling open (A) of hoist motor (1), the mouth that falls (B); When hoist brake (3) is opened, hoist motor (1) brake off; When hoist brake (3) is locked, braking is implemented to hoist motor (1).
2. system system according to claim 1, is characterized in that:
System system also comprises brake control valve (4), and brake control valve (4) is for controlling the unlatching of hoist brake (3) and locked.
3. system system according to claim 2, is characterized in that:
Hoist brake (3) is connected to driving oil circuit (P) and overflow oil circuit (L) by braking operation oil circuit via brake control valve (4).
4. system system according to claim 3, is characterized in that:
Brake control valve (4) is two position three way directional control valve, the actuator port of two position three way directional control valve is connected to braking operation oil circuit, oil inlet is connected to driving oil circuit (P), return opening is connected to overflow oil circuit (L), by the commutation of two position three way directional control valve, braking operation oil circuit is optionally communicated with driving oil circuit (P) or overflow oil circuit (L).
5. system system according to claim 4, is characterized in that:
The rod chamber of hoist brake (3) is connected to the actuator port of brake control valve (4) by braking operation oil circuit.
6. system system according to claim 4, is characterized in that:
System system also comprises pressure valve (5), and the oil inlet of pressure valve (5) is communicated with driving oil circuit (P), oil outlet is communicated with the oil inlet of brake control valve (4).
7. system system according to claim 6, is characterized in that:
Pressure valve (5) comprises damping plug (6), reducing valve (7) and by pass valve (8), the oil inlet of damping plug (6) is communicated with driving oil circuit (P), oil outlet is communicated with the oil inlet of reducing valve (7), the oil outlet of reducing valve (7) is communicated with the oil inlet of brake control valve (4), the oil inlet of by pass valve (8) respectively, and the oil outlet of by pass valve (8) is communicated with overflow oil circuit (L).
8. system system according to claim 7, is characterized in that:
Reducing valve (7) and by pass valve (8) will drive the pressure of oil circuit (P) to 2.5MPa.
9. system system according to claim 1, is characterized in that:
Change-over valve (2) is three-position four-way electromagnetic directional valve.
10. a hoisting crane, is characterized in that, described hoisting crane comprises the system system described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420715760.6U CN204324783U (en) | 2014-11-25 | 2014-11-25 | A kind of system system and hoisting crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420715760.6U CN204324783U (en) | 2014-11-25 | 2014-11-25 | A kind of system system and hoisting crane |
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| Publication Number | Publication Date |
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| CN204324783U true CN204324783U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420715760.6U Active CN204324783U (en) | 2014-11-25 | 2014-11-25 | A kind of system system and hoisting crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108275595A (en) * | 2018-03-30 | 2018-07-13 | 安徽柳工起重机有限公司 | The winch control system and crane super lifting mechanism of crane super lifting mechanism |
-
2014
- 2014-11-25 CN CN201420715760.6U patent/CN204324783U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108275595A (en) * | 2018-03-30 | 2018-07-13 | 安徽柳工起重机有限公司 | The winch control system and crane super lifting mechanism of crane super lifting mechanism |
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