CN105621302A - Anti-stall device and crane - Google Patents
Anti-stall device and crane Download PDFInfo
- Publication number
- CN105621302A CN105621302A CN201610173613.4A CN201610173613A CN105621302A CN 105621302 A CN105621302 A CN 105621302A CN 201610173613 A CN201610173613 A CN 201610173613A CN 105621302 A CN105621302 A CN 105621302A
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- China
- Prior art keywords
- oil circuit
- pump
- hydro
- antistall
- reel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/42—Control devices non-automatic
- B66D1/44—Control devices non-automatic pneumatic of hydraulic
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to an anti-stall device. The anti-stall device comprises a hydraulic buffering system and a mechanical connecting mechanism; the hydraulic buffering system comprises a hydraulic pump, an oil tank, a normally-open through-flow oil way, a control oil way and a buffer through-flow oil way, wherein the normally-open through-flow oil way, the control oil way and the buffer through-flow oil way are arranged between the hydraulic pump and the oil tank; a mechanical connection mechanism is connected to the hydraulic pump to transfer rotation of a reel to the hydraulic pump and drive the hydraulic pump to rotate; the normally-open through-flow oil way is used for allowing oil liquid to be conveyed to the oil tank from the hydraulic pump through the normally-open through-flow oil way when the outlet pressure of the hydraulic pump is smaller than a setting value; and when the outlet pressure of the hydraulic pump is larger than or equal to the setting value, the normally-open through-flow oil way is closed, the control oil way and the buffer through-flow oil way are opened, and the oil liquid is allowed to be conveyed to the oil tank from the hydraulic pump through the normally-open through-flow oil way. The invention further provides a crane comprising the above anti-stall device. The anti-stall device is high in reliability and rapid in response; and the reel drives the hydraulic pump to rotate through the mechanical connection mechanism, impact of the hydraulic pump in the buffer process is avoided, motion is stable, and vibration is small.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of antistall device and lifting machine.
Background technology
Main brake device damping force transfer route length in lifting machine braking process, the load that hoists weight, work under bad environment, operation are frequent, easily because of electric, mechanical fault or operation reason generation hook slipping of crane phenomenon, this is the major issue perplexing hoisting machinery operating safety for a long time. For ensureing crane hoisting job safety, " hoist design specification " requires to install safety brake on important lifting mechanism and luffing mechanism.
In real work, usually arranging a normal Closed Hydraulic on drum wheels limit and clamp as safety brake, the retarding disc clamping drum wheels limit clamped by hydraulic safe realizes friction braking. Owing to friction plate acutely generates heat in braking process, the thermal stability limit of the conventional friction sheet stopping distance of stopper; Meanwhile, there is certain time of response in hydraulic safe pincers, before stopper responds, hook slipping of crane makes lift heavy kinetic energy increase sharply, and the distance needed for lift heavy brake exceedes the stopping distance that stopper can bear, thus makes brake fade. In addition, when lifting machine slips hook accident when hoisting heavy, due to the speedup effect of speed reduction unit and tackleblock, lifting motor, transmission shaft, reel can increase sharply by rotating speed along with the acceleration downslide of lift heavy, main brake device and safety brake also produce huge radial vibration thereupon, in brake process, braking watt can be subject to huge radial impact and produce to destroy, and significantly limit the reliability of braking.
Summary of the invention
Based on this, it is necessary to provide a kind of and respond antistall device very fast, that reliability is higher and lifting machine.
A kind of antistall device, for connecting the reel of lifting machine, it comprises hydraulic buffer system and is mechanically connected mechanism, described mechanical connection mechanism is connected between described reel and described hydraulic buffer system, described hydraulic buffer system comprises hydro-pump and fuel tank, and be located at and often open stream oil circuit between described hydro-pump and described fuel tank, oil circuit control and the through-flow oil circuit of buffering, described mechanical connection mechanism is connected to described hydro-pump and passes to described hydro-pump with the rotation by described reel and drive described hydro-pump to rotate, described stream oil circuit of often opening is for when the top hole pressure of described hydro-pump is less than set(ting)value, fluid is allowed to be delivered to described fuel tank through described stream oil circuit of often opening from described hydro-pump, when the top hole pressure of described hydro-pump is more than or equal to described set(ting)value, described stream oil circuit of often opening is closed, described oil circuit control and the through-flow oil circuit of described buffering are opened, fluid is allowed to be delivered to described fuel tank through the through-flow oil circuit of described buffering from described hydro-pump.
Above-mentioned antistall device by the size of the top hole pressure according to the hydro-pump directly related with reel rotating speed determines whether cushion, reliability height; And hydraulic buffer system is passive buffering, triggers the through-flow oil circuit of buffering by oil circuit control and open, it is not necessary to electric-controlled hydraulic pumping plant starts, and damping force exports fast, and response is fast; Reel by be mechanically connected mechanism drive hydro-pump rotate, relative to during brake braking watt and wheel hub between moment impact collision, in slow process hydro-pump do not exist mechanical shock collision, stable movement vibration little.
Wherein in an embodiment, described stream oil circuit of often opening is provided with pressure detecting element, for detecting the top hole pressure of described hydro-pump, described often opens stream oil circuit to determine whether to close.
Wherein in an embodiment, described often opening also is provided with throttling valve on stream oil circuit, and described throttling valve is located between described pressure detecting element and described fuel tank.
Wherein in an embodiment, described often opening also is provided with adjustable sluice valve, the overrunning clutch that described oil circuit control is provided with oil motor and is located between described oil motor and described adjustable sluice valve on stream oil circuit.
Wherein in an embodiment, described oil circuit control being also provided with surplus valve, described surplus valve is located between described oil motor and described fuel tank.
Wherein in an embodiment, described oil circuit control being also provided with throttling valve, described throttling valve is located between described hydro-pump and described oil motor.
Wherein in an embodiment, described buffering is through-flow, and oil circuit is provided with buffer element, and described buffer element is used for according to the intake pressure of described surplus valve and the relation of set(ting)value, it is determined that its state closed or open.
Wherein in an embodiment, described buffer element is cartridge valve, and the import of described cartridge valve is connected with described hydraulic pressure pump outlet, and outlet is connected with described fuel tank, and control oil mouth is connected to described oil circuit control.
Wherein in an embodiment, the 2nd driving member that described mechanical connecting structure comprises the first driving member coaxially arranged with described reel and coaxially arranges with described hydro-pump, described first driving member and described 2nd driving member are in transmission connection, described reel drives described first driving member to rotate when rotating, thus drive described 2nd driving member to rotate, and then described hydro-pump is driven to rotate.
The present invention also provides a kind of lifting machine, and it comprises reel and above-mentioned antistall device, and described reel is connected to the described mechanical connection mechanism of described antistall device.
The size by the top hole pressure according to the hydro-pump directly related with reel rotating speed of the antistall device of lifting machine determines whether cushion, reliability height; And hydraulic buffer system is passive buffering, triggers the through-flow oil circuit of buffering by oil circuit control and open, it is not necessary to electric-controlled hydraulic pumping plant starts, and damping force exports fast, and response is fast; Reel by be mechanically connected mechanism drive hydro-pump rotate, relative to during brake braking watt and wheel hub between moment impact collision, in slow process hydro-pump do not exist mechanical shock collision, stable movement vibration little.
Accompanying drawing explanation
Fig. 1 is the structural representation of the antistall device of an embodiment;
Fig. 2 is the hydraulic schematic diagram of the antistall device shown in Fig. 1.
Figure marks: hydraulic buffer system 10, it is mechanically connected mechanism 20, reel 90, hydro-pump 102, fuel tank 104, pressure detecting element 106, throttling valve 108, adjustable sluice valve 110, oil motor 112, overrunning clutch 114, surplus valve 116, throttling valve 118, buffer element 120, cushion valve block 122, first driving member the 202, two driving member 204.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully. Accompanying drawing gives the preferred embodiment of the present invention. But, the present invention can realize in many different forms, is not limited to embodiment described herein. On the contrary, it is provided that the object of these embodiments makes the understanding of the disclosure to the present invention more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, it can directly on another element or can also there is element placed in the middle. When an element is considered as " connection " another element, it can be directly connected to another element or may there is element placed in the middle simultaneously. Term as used herein " vertical ", " level ", "left", "right" and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology used herein are identical with the implication that the those skilled in the art belonging to the present invention understand usually with scientific terminology. The term used in the description of the invention herein is the object in order to describe specific embodiment, is not intended to be restriction the present invention. Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
As depicted in figs. 1 and 2, a kind of antistall device of this better embodiment, for connecting the reel 90 of lifting machine, comprise hydraulic buffer system 10 and it is mechanically connected mechanism 20, being mechanically connected mechanism 20 is connected between reel 90 and hydraulic buffer system 10, hydraulic buffer system 10 comprises hydro-pump 102 and fuel tank 104, and be located at and often open stream oil circuit between hydro-pump 102 and fuel tank 104, oil circuit control and the through-flow oil circuit of buffering, mechanical connection mechanism 20 is connected to hydro-pump 102 and passes to hydro-pump 102 with the rotation by reel 90 and drive hydro-pump 102 to rotate, often open stream oil circuit for when the top hole pressure of hydro-pump 102 is less than set(ting)value, allow fluid often to open stream oil circuit and it is delivered to fuel tank 104 from hydro-pump 102, when the top hole pressure of hydro-pump 102 is more than or equal to set(ting)value, often open stream oil circuit to close, oil circuit control and the through-flow oil circuit of buffering are opened, through-flow oil circuit is delivered to fuel tank 104 from hydro-pump 102 through cushioning to allow a large amount of fluid, realize buffering, prevent lifting machine stall.
It should be noted that, in the present embodiment, said antistall device connects the reel 90 of lifting machine, can being that antistall device is directly connected in reel 90, it is possible to be indirectly connected to reel 90, namely antistall device can be connected to other rotation mechanisms with reel 90 synchronous axial system.
When above-mentioned antistall device installed by lifting machine, when lifting machine normal operation, the rotating speed of reel 90 is lower, and the top hole pressure of hydro-pump 102 is lower, and fluid is often opened stream oil circuit and flow to fuel tank 104; During lifting machine stall, reel 90 high-speed rotation, drive hydro-pump 102 also high-speed rotation, the sucking-off from fuel tank 104 of a large amount of fluid, the top hole pressure of hydro-pump 102 increases, and when the top hole pressure of hydro-pump 102 is greater than set(ting)value, often opens stream oil circuit and closes, oil circuit control and the through-flow oil circuit of buffering are opened, hydraulic efficiency system buffering energy-absorbing.
In this antistall device, determine whether cushion by the size of the top hole pressure according to the hydro-pump 102 directly related with reel 90 rotating speed, reliability height; And hydraulic buffer system 10 is passive buffering, triggers the through-flow oil circuit of buffering by oil circuit control and open, it is not necessary to electric-controlled hydraulic pumping plant starts, and damping force exports fast, and response is fast; Reel by be mechanically connected mechanism drive hydro-pump rotate, relative to during brake braking watt and wheel hub between moment impact collision, in slow process hydro-pump do not exist mechanical shock collision, stable movement vibration little.
Refer to Fig. 2, in the present embodiment, often open stream oil circuit and be provided with pressure detecting element 106, for detecting the top hole pressure of hydro-pump 102, often open stream oil circuit to determine whether to close. Specifically, pressure detecting element 106 is for often to drive two-way sequence valve, and its oil-in is connected with the outlet of hydro-pump 102, when the top hole pressure of hydro-pump 102 is less than set(ting)value, often drives two-way sequence valve and opens, and stream oil circuit flows through from often opening to allow fluid.
In the present embodiment, often opening and be also provided with throttling valve 108 on stream oil circuit, throttling valve 108 is located between pressure detecting element 106 and fuel tank 104. When lifting machine stall, due to the damping action of throttling valve 108, the top hole pressure of hydro-pump 102 will significantly increase.
In the present embodiment, often open and stream oil circuit is also provided with adjustable sluice valve 110, the overrunning clutch 114 that oil circuit control is provided with oil motor 112 and is located between oil motor 112 and adjustable sluice valve 110. When the top hole pressure of hydro-pump 102 is more than or equal to set(ting)value, often open stream oil circuit to close, fluid flows to fuel tank 104 through oil circuit control, oil motor 112 is driven in rotation, and driven by overrunning clutch 114 and close adjustable sluice valve 110, make weight be decelerated in the process of stopping, the top hole pressure decline of hydro-pump 102, often open stream oil circuit and can not again open and stall again. Specifically, the output shaft of oil motor 112 is connected with the input shaft of adjustable sluice valve 110 by overrunning clutch 114.
In the present embodiment, oil circuit control is also provided with surplus valve 116, the setting pressure of surplus valve 116 and above-mentioned set(ting)value. Specifically, surplus valve 116 is located between oil motor 112 and fuel tank 104.
In the present embodiment, oil circuit control being also provided with throttling valve 118, throttling valve 118 is located between hydro-pump 102 and oil motor 112.
In the present embodiment, cushioning through-flow oil circuit and be provided with buffer element 120, buffer element 120 is for the relation of the top hole pressure according to hydro-pump 102 and set(ting)value, it is determined that its state closed or open. When the top hole pressure of hydro-pump 102 is greater than set(ting)value, buffer element 120 is opened, and through cushioning, through-flow oil circuit flow to fuel tank 106 to fluid, carries out energy-absorbing buffering. Specifically, buffer element 120 is cartridge valve, and the import of cartridge valve is connected with the outlet of hydro-pump 102, and outlet is connected with fuel tank 104, and the oily mouth of control is connected to oil circuit control, is specifically connected to the surplus valve 116 on oil circuit control and between oil motor 112. Setting cushion effect by surplus valve 116, by the flow of cartridge valve hydraulic control oil, cushion effect exports steadily, ensures wireline safety in braking process.
Specifically, above-mentioned stream oil circuit, oil circuit control and the through-flow oil circuit of buffering often opened all is located on cushion valve block 122 (see Fig. 1).
Refer to Fig. 1, the 2nd driving member 204 that mechanical connecting structure 20 comprises the first driving member 202 coaxially arranged with reel 90 and coaxially arranges with hydro-pump 102, first driving member 202 and the 2nd driving member 204 are in transmission connection, reel 90 drives the first driving member 202 to rotate when rotating, thus drive the 2nd driving member 204 to rotate, and then hydro-pump 102 is driven to rotate. Specifically, the first driving member 202 can be master wheel, and the 2nd driving member 204 can be pinion(gear) 204, and master wheel engages with pinion(gear). It can be appreciated that the first driving member 202 and the 2nd driving member 204 also can be other transmission rigs beyond gear, as long as speedup can be realized.
During lifting machine normal operation, the rotating speed of reel 90 is lower, the top hole pressure of hydro-pump 102 is lower, cartridge valve and the surplus valve 116 of hydraulic buffer system 10 are all closed, cushion through-flow oil circuit and oil circuit control obstructed, often opening stream oil circuit to open, allow fluid often to open stream oil circuit from hydro-pump 102 and flow to fuel tank 104, hydraulic buffer system 10 does not play buffering energy-absorbing. When lifting machine stall, reel 90 high speed rotating, the number of teeth of the first driving member 202 is the several times of the number of teeth of the 2nd driving member 204, play speedup effect, 2nd driving member 204 drives hydro-pump 102 high speed rotating, the sucking-off from fuel tank of a large amount of fluid, under the damping action often opening stream oil circuit, the top hole pressure of hydro-pump 102 significantly increases; The top hole pressure of hydro-pump 102 is higher than, when often opening the setting pressure of two-way sequence valve and surplus valve 116, often opening stream oil circuit and close, and oil circuit control and the through-flow oil circuit of buffering are opened, hydraulic efficiency system buffering energy-absorbing; In buffering course, oil motor 112 cuts out adjustable sluice valve 110 by overrunning clutch 114 so that weight is decelerated in the process of stopping, and hydro-pump 102 top hole pressure declines, and often opens stream oil circuit and can not again open; After weight braking stops, weight is positioned in midair, and the lifting mechanism of lifting machine needs again to start, weight is slowly put down, at this moment need the setting pressure of manual or automatically controlled adjustment surplus valve 116, reduce the resistance that moved by lifting mechanism of antistall device, make weight slowly decline and land.
The present invention also provides a kind of lifting machine, and it comprises reel 90 and above-mentioned antistall device, and reel 90 is connected to the mechanical connection mechanism 20 of antistall device.
Each technology feature of the above embodiment can combine arbitrarily, for making description succinct, each all possible combination of technology feature in above-described embodiment is not all described, but, as long as the combination of these technology features does not exist contradiction, all it is considered to be the scope that this specification sheets is recorded.
The above embodiment only have expressed several enforcement modes of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent. , it is also possible to make some distortion and improvement, it should be appreciated that for the person of ordinary skill of the art, without departing from the inventive concept of the premise these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an antistall device, for connecting the reel of lifting machine, it is characterized in that: comprise hydraulic buffer system and be mechanically connected mechanism, described mechanical connection mechanism is connected between described reel and described hydraulic buffer system, described hydraulic buffer system comprises hydro-pump and fuel tank, and be located at and often open stream oil circuit between described hydro-pump and described fuel tank, oil circuit control and the through-flow oil circuit of buffering, described mechanical connection mechanism is connected to described hydro-pump and passes to described hydro-pump with the rotation by described reel and drive described hydro-pump to rotate, described stream oil circuit of often opening is for when the top hole pressure of described hydro-pump is less than set(ting)value, fluid is allowed to be delivered to described fuel tank through described stream oil circuit of often opening from described hydro-pump, when the top hole pressure of described hydro-pump is more than or equal to described set(ting)value, described stream oil circuit of often opening is closed, described oil circuit control and the through-flow oil circuit of described buffering are opened, fluid is allowed to be delivered to described fuel tank through the through-flow oil circuit of described buffering from described hydro-pump.
2. antistall device according to claim 1, it is characterised in that, described stream oil circuit of often opening is provided with pressure detecting element, for detecting the top hole pressure of described hydro-pump, described often opens stream oil circuit to determine whether to close.
3. antistall device according to claim 2, it is characterised in that, described often opening also is provided with throttling valve on stream oil circuit, and described throttling valve is located between described pressure detecting element and described fuel tank.
4. antistall device according to Claims 2 or 3, it is characterised in that, described often opening also is provided with adjustable sluice valve, the overrunning clutch that described oil circuit control is provided with oil motor and is located between described oil motor and described adjustable sluice valve on stream oil circuit.
5. antistall device according to claim 4, it is characterised in that, described oil circuit control is also provided with surplus valve, described surplus valve is located between described oil motor and described fuel tank.
6. antistall device according to claim 4, it is characterised in that, described oil circuit control is also provided with throttling valve, described throttling valve is located between described hydro-pump and described oil motor.
7. antistall device according to claim 1, it is characterised in that, described buffering is through-flow, and oil circuit is provided with buffer element, and described buffer element is used for according to the intake pressure of described surplus valve and the relation of set(ting)value, it is determined that its state closed or open.
8. antistall device according to claim 7, it is characterised in that, described buffer element is cartridge valve, and the import of described cartridge valve is connected with described hydraulic pressure pump outlet, and outlet is connected with described fuel tank, and control oil mouth is connected to described oil circuit control.
9. antistall device according to claim 1, it is characterized in that, the 2nd driving member that described mechanical connecting structure comprises the first driving member coaxially arranged with described reel and coaxially arranges with described hydro-pump, described first driving member and described 2nd driving member are in transmission connection, described reel drives described first driving member to rotate when rotating, thus drive described 2nd driving member to rotate, and then described hydro-pump is driven to rotate.
10. a lifting machine, it is characterised in that, described lifting machine comprises the antistall device as described in reel and item as arbitrary in claim 1-9, and described reel is connected to the described mechanical connection mechanism of described antistall device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610173613.4A CN105621302B (en) | 2016-03-24 | 2016-03-24 | anti-stall device and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610173613.4A CN105621302B (en) | 2016-03-24 | 2016-03-24 | anti-stall device and crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105621302A true CN105621302A (en) | 2016-06-01 |
| CN105621302B CN105621302B (en) | 2018-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610173613.4A Expired - Fee Related CN105621302B (en) | 2016-03-24 | 2016-03-24 | anti-stall device and crane |
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| Country | Link |
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| CN (1) | CN105621302B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582024A (en) * | 2021-06-17 | 2021-11-02 | 中联重科股份有限公司 | Negative power control method, equipment and system for crane and crane |
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| CN102050400A (en) * | 2010-12-16 | 2011-05-11 | 大连华锐股份有限公司 | Passive overspeed protective device used for lifting drum of crane |
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| CN204675707U (en) * | 2015-05-19 | 2015-09-30 | 湖南汽车工程职业学院 | A kind of mine rescue machine |
| CN204873620U (en) * | 2015-08-03 | 2015-12-16 | 河南省三马起重机械有限公司 | Caterpillar crane does not have rising of explosion -proof valve and rises system |
| CN105347216A (en) * | 2015-12-02 | 2016-02-24 | 北华航天工业学院 | High-reliability mining elevator hydraulic control system |
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2016
- 2016-03-24 CN CN201610173613.4A patent/CN105621302B/en not_active Expired - Fee Related
Patent Citations (7)
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|---|---|---|---|---|
| CN102050400A (en) * | 2010-12-16 | 2011-05-11 | 大连华锐股份有限公司 | Passive overspeed protective device used for lifting drum of crane |
| CN201991851U (en) * | 2011-04-18 | 2011-09-28 | 朱天锡 | Open-type hydraulic drive system having hydraulic reversing buffering function |
| CN203143550U (en) * | 2013-01-11 | 2013-08-21 | 中国矿业大学 | Hydraulic tensioning device for belt conveyor |
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| CN113582024A (en) * | 2021-06-17 | 2021-11-02 | 中联重科股份有限公司 | Negative power control method, equipment and system for crane and crane |
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| CN105621302B (en) | 2018-01-02 |
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Granted publication date: 20180102 |