CN1419018A - Eccentric device for vibration piling hammer - Google Patents
Eccentric device for vibration piling hammer Download PDFInfo
- Publication number
- CN1419018A CN1419018A CN 02158549 CN02158549A CN1419018A CN 1419018 A CN1419018 A CN 1419018A CN 02158549 CN02158549 CN 02158549 CN 02158549 A CN02158549 A CN 02158549A CN 1419018 A CN1419018 A CN 1419018A
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- Prior art keywords
- eccentric
- eccentric shaft
- spring
- eccentric body
- shaft
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- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 description 6
- 238000013459 approach Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000002153 concerted effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- OIGNJSKKLXVSLS-VWUMJDOOSA-N prednisolone Chemical compound O=C1C=C[C@]2(C)[C@H]3[C@@H](O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 OIGNJSKKLXVSLS-VWUMJDOOSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The eccentric device of vibratory pile driving hammer has eccentric body and eccentric shaft, and is characterized by that the described eccentric body is mounted on the eccentric shaft, on the described eccentric shaft a spring hole is opened, the interior of the described spring hole is equipped with spring, and the centroidal of the described eccentric body and centre of the described eccentric shaft have preformed distnace. By adopting the spring planced in the spring hole of eccentric shaft the length deformation produced when it is worked can make the centroidal position of eccentric body correspondent to the position of eccentric shaft produce displacement to obtain the change of eccentric moment from small to large so as to implement the goal of zero-load starting. Its structure is simple and efficiency is high.
Description
Technical field
What the present invention relates to is a kind of pile hammer of constructional engineering machinery, particularly be the improvement invention of a kind of vibropiling hammer, what be specifically related to is the invention of pile hammer eccentric.
Background technology
In the prior art, the basic principle of the eccentric of vibropiling hammer be use centrifugal force that a pair of above eccentric body that is fixed on two synchronous reversing shafts produces under certain rotating speed with joint efforts (claiming exciting force again) make vibrator at vertical vibration, realize the purpose of vibropiling, the centrifugal force that the is produced P=k ω that makes a concerted effort
2Cos (ω t)/g=Lm ω
2Its K=Lmg of cos (ω t), it is eccentric moment, L is the eccentric throw of eccentric body with respect to the axle center, m is the quality of eccentric body, ω is the angular velocity of eccentric shaft, t is the time, the eccentric of this vibropiling hammer, owing to action of gravity, the barycenter of eccentric body must be below eccentric shaft at prestart, make its starting rotation, the essential starting power that consumes motor, and this is that a kind of fullcharging carries starting, because the rotation of eccentric body is to start from scratch, power consumption is very big during starting, the vibrating hammer starting current of real work surpasses seven times of normal current, seriously influences the stable of electric network source, and consumes energy, sometimes also can be difficult to starting because electric network source power is low, so it must inform that when dispatching from the factory near the transformer capacity its building site of user must for solving starting difficulty, exceed much than actual operate as normal desired power when selecting power of motor greater than more than four times of power of motor, the utilization rate of power of motor is reduced greatly, virtually consumes energy.Recent decades, people's attempt is developed a kind of existing in zero loading status starting, the eccentric of vibropiling hammer simple in structure again, that efficient is high, cost is low.Therefore just produced a kind of vibrating hammer of zero load starting in Japan, its structure is that each eccentric body all is divided into identical two half of shape size, wherein be fixed on for half on the eccentric shaft, can on eccentric shaft, move for half in addition, at the vibrating hammer prestart, utilize the complicated attachment device of a cover, make the symmetric position that can be positioned and be fixed on half eccentric body on the eccentric shaft at half eccentric body that moves on the eccentric shaft, reaching total eccentric moment is zero, actuating motor then, after rotating speed reaches operate as normal, utilize attachment device that mobile half eccentric body is moved to half eccentric body of dead axle again and merge into integral body.Reach the eccentric moment of designing requirement, the vibrating hammer of this zero load starting has solved the problem of full load starting, but the complicated attachment device of one cover, manufacture difficulty height, cost height, maintenance difficult and start the part power that attachment device takies motor again, its price exceeds more than three times of identical ability to work vibrating hammer, so fail to bring social benefit to the building engineering construction industry.
Summary of the invention
In view of the problem that known technology exists, purpose of the present invention aim to provide a kind of simple in structure, energy consumption is low, noise is low, easy to manufacture, easy to maintenance, cost low and the eccentric of vibropiling hammer that can zero load starting.For achieving the above object, the present invention finishes as follows: the eccentric of this vibropiling hammer, have eccentric body and eccentric shaft, described eccentric shaft is square, described eccentric body is installed on the square eccentric shaft, have spring eye on the described eccentric shaft, be provided with spring in the hole of described square eccentric shaft, the barycenter of described eccentric body and the center of eccentric shaft have the reservation distance, the precompression of described spring square shaped eccentric shaft equals the weight of eccentric body, make the center of the barycenter of eccentric body near eccentric shaft, the centrifugal force when the eccentric body operate as normal of the eccentric of vibropiling hammer and the weight sum of eccentric body are greater than the precompression of described spring to eccentric shaft, when it approached operate as normal, the displacement of eccentric body barycenter was tending towards the equilibrium,transient state.The present invention uses the spring that places in the square eccentric shaft spring eye, the eccentric body position is for the relative displacement of the center of eccentric shaft during its work, realize the purpose of zero load starting, during from whole starting process to operate as normal, do not need other attachment devices and additional power, and after the overall structure of vibrating hammer adopts vibration damping noise reduction measure, vibrating hammer with low noise environment-friendly function, it is simple in structure, design science, the electric energy consumption rate is low, and cost is low, will bring positive result of use and social benefit to building engineering construction, be the preferred unit of construction work industry.
Description of drawings
The present invention has following accompanying drawing:
Fig. 1 is a prior art constructions cross-sectional schematic of the present invention;
Fig. 2 is the lateral view of prior art prestart eccentric body of the present invention;
Fig. 3 is the sectional view of prior art prestart eccentric body of the present invention;
Fig. 4 is the lateral view of prior art starting of the present invention back eccentric body;
Fig. 5 is the prestarting structure cross-sectional schematic of the present invention;
Fig. 6 is the prestarting elevation of the present invention;
Fig. 7 is the sectional view after the present invention starting
Fig. 8 starts the back elevation for the present invention.
Half eccentric body of 1 expression prior art among the figure, the eccentric body identical in the 2 expression prior aries, the eccentric shaft of 3 expression prior aries with 1 shape.
The specific embodiment
Accompanying drawing has been represented structure of the present invention and embodiment, describe each relevant details and principle thereof of embodiment below more in conjunction with the accompanying drawings in detail, the eccentric of this vibropiling hammer, have eccentric body 4 and eccentric shaft 5, described eccentric shaft 5 is a rectangle, and eccentric body 4 is installed on the rectangle eccentric shaft 5, is provided with spring 6 in the spring eye 9 of rectangle eccentric shaft 5, at prestart eccentric body 4 position such as Fig. 5, Fig. 6, the precompression F of 6 pairs of eccentric shafts 5 of spring with eccentric shaft 5
0Greater than the weight mg of eccentric body 4, make center 8 positions of the barycenter 7 of eccentric body 4 near eccentric shaft 5.For convenience of description, present embodiment is represented the relation of various computings with formula.The precompression F of 6 pairs of eccentric shafts 5 of above-mentioned spring
0Be expressed as F with formula
0=PX
0, its P represents the rigidity of spring 6; X
0The length deformation amount of expression spring 6 after beginning to start, is given the eccentric throw L that stays
0Centrifugal force when beginning to start is P
0, according to the relational expression P of centrifugal force and eccentric body angular velocity
0=L
0M ω
0 2, ω wherein
0The angular velocity of expression eccentric body when beginning to start.Because L when design
0Very little, and approach zero, required power W when beginning to start
0=L
0Mg ω
0 2Also approach zero, work as W
0When approaching zero, power required when it begins to start also approaches 0, so the present invention is zero load starting.Present embodiment makes the precompression F of spring 6 when design
0Greater than the weight of eccentric body 4, i.e. F
0＞mg has very little centrifugal force P when beginning to start
0, but the barycenter of eccentric body 4 is subjected to displacement, still keeping the state of zero load starting, along with the increase of angular velocity omega, centrifugal force also and then increases, and when angular velocity increases to when approaching operate as normal speed, the angular velocity of establishing this moment is ω
i, i.e. its centrifugal force P
i=L
0M ω
i 2, the centrifugal force P when it approaches operate as normal
iEqual the precompression F of spring with the weight mg sum of eccentric body
0The time, i.e. P
i+ mg=F
0, this moment, the center 8 of eccentric body 4 barycenter, 7 displacements and eccentric shaft 5 was tending towards the equilibrium,transient state, and when the angular velocity of eccentric body 4 increases to greater than near the angular velocity of operate as normal the time, establishing angular velocity at this moment is ω, i.e. ω＞ω
i, at this moment, the centrifugal force P of eccentric body 4 is the centrifugal force P greater than near operate as normal the time also
i, the weight mg sum of centrifugal force P and eccentric body 4 is greater than spring 6 precompression F simultaneously
0, i.e. P+mg＞F
0, spring 6 shortens owing to being subjected to action of centrifugal force, and the length deformation amount is by X
0To X, following eccentric body 4 barycenter eccentric throws by L
0Move on to L, the increment of its eccentric body 4 barycenter displacements is L-L
0=X
0-X, and the increment of spring pressure and centrifugal force is respectively Δ F=P (X
0-X) and Δ P=(L-L
0) (ω
2-ω
i 2) m, the increment Delta F of spring pressure is directly proportional with the length deformation amount of spring, and the centrifugal force increment also is directly proportional with barycenter 7 displacement increments of eccentric body 4, and be directly proportional with the difference of two squares of angular velocity, barycenter 7 disequilibriums of while eccentric body 4, at this moment, the displacement that the position of eccentric body 4 barycenter produces, reach the eccentric throw of designing requirement, make exciting force (being centrifugal force) also reach designing requirement simultaneously.In the foregoing description, L and P are eccentric body barycenter eccentric throw and the centrifugal force that reaches designing requirement.
The eccentric of vibropiling hammer of the present invention is the starting process of zero load in whole starting process, during extremely near the operate as normal rotating speed, increases load continuation starting and arrives piling working speed and working load.The described eccentric throw L that stays that gives
0Present embodiment is defined as L through construction test
0＜0.05L, it is ω that the definite value of eccentric body angular velocity is closed
i＜0.95 ω.According to the eccentric that the vibropiling of design motif made of the present invention is hammered into shape, bring positive result of use will for the building engineering construction industry, compared with prior art have substantive distinguishing features and obvious improvement.
Claims (4)
1, a kind of eccentric of vibropiling hammer, have eccentric body and eccentric shaft, it is characterized in that described eccentric body (4) is installed on the eccentric shaft (5), have spring eye (9) on the described eccentric shaft (5), be provided with spring (6) in the spring eye (9) of described eccentric shaft (5), the barycenter (7) of described eccentric body (4) has the distance of reservation (L with the center (8) of eccentric shaft (5)
0).
2, the eccentric of vibropiling hammer according to claim 1 is characterized in that described eccentric shaft (5) is for square.
3, the eccentric of vibropiling hammer according to claim 1 is characterized in that the precompression (F of described spring (6) to eccentric shaft (5)
0) equal the weight (mg) of eccentric body.
4, the eccentric of vibropiling hammer according to claim 1, the centrifugal force when it is characterized in that eccentric body (4) operate as normal is greater than the precompression (F of spring (6) to eccentric shaft (5)
0) with weight (mg) sum of eccentric body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021585490A CN1177110C (en) | 2002-12-26 | 2002-12-26 | Eccentric device for vibration piling hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021585490A CN1177110C (en) | 2002-12-26 | 2002-12-26 | Eccentric device for vibration piling hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1419018A true CN1419018A (en) | 2003-05-21 |
| CN1177110C CN1177110C (en) | 2004-11-24 |
Family
ID=4753131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021585490A Expired - Fee Related CN1177110C (en) | 2002-12-26 | 2002-12-26 | Eccentric device for vibration piling hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177110C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774665A (en) * | 2014-02-28 | 2014-05-07 | 北京南车时代机车车辆机械有限公司 | Hydraulic vibration hammer |
| CN110409442A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | It is a kind of to reduce the pile sinking process that vibration influences based on marmem |
| CN110409445A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | Reduce pile-sinking device and pile sinking process that vibration influences |
| CN110409441A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | Reduction vibration based on phase transformation driving influences vibrohammer and pile sinking process |
| CN110409444A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | A kind of reduction vibration influence pile sinking process based on phase transformation |
| CN110409443A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | The vibrohammer and pile sinking process for reducing vibration and influencing are deformed based on radiation |
-
2002
- 2002-12-26 CN CNB021585490A patent/CN1177110C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774665A (en) * | 2014-02-28 | 2014-05-07 | 北京南车时代机车车辆机械有限公司 | Hydraulic vibration hammer |
| CN110409442A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | It is a kind of to reduce the pile sinking process that vibration influences based on marmem |
| CN110409445A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | Reduce pile-sinking device and pile sinking process that vibration influences |
| CN110409441A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | Reduction vibration based on phase transformation driving influences vibrohammer and pile sinking process |
| CN110409444A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | A kind of reduction vibration influence pile sinking process based on phase transformation |
| CN110409443A (en) * | 2019-07-30 | 2019-11-05 | 浙江科技学院 | The vibrohammer and pile sinking process for reducing vibration and influencing are deformed based on radiation |
| CN110409445B (en) * | 2019-07-30 | 2021-04-13 | 浙江科技学院 | Pile sinking device and method for reducing vibration influence |
| CN110409441B (en) * | 2019-07-30 | 2021-05-11 | 浙江科技学院 | Vibration pile hammer capable of reducing vibration influence based on phase change driving and pile sinking method |
| CN110409442B (en) * | 2019-07-30 | 2021-05-11 | 浙江科技学院 | Pile sinking method for reducing vibration influence based on shape memory alloy |
| CN110409444B (en) * | 2019-07-30 | 2021-05-11 | 浙江科技学院 | Pile sinking method capable of reducing vibration influence based on phase change |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177110C (en) | 2004-11-24 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041124 Termination date: 20161226 |