CN203594026U - Electric variable frequency amplitude modulation vibration head - Google Patents
Electric variable frequency amplitude modulation vibration head Download PDFInfo
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- CN203594026U CN203594026U CN201320773877.5U CN201320773877U CN203594026U CN 203594026 U CN203594026 U CN 203594026U CN 201320773877 U CN201320773877 U CN 201320773877U CN 203594026 U CN203594026 U CN 203594026U
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- main shaft
- eccentric block
- variable frequency
- block group
- eccentric
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Abstract
The utility model relates to an electric variable frequency amplitude modulation vibration head. According to the technical scheme, a machine frame is connected with a vibration box, a pressurization pulley set and a lifting pulley set are arranged at the upper end of the machine frame, damping spring sets are symmetrically arranged, one end of each damping spring set is connected with the machine frame, the other end of each damping spring set is connected with the vibration box, the two ends of the vibration box are symmetrically provided with shock-proof alternating current variable frequency electric motors respectively, each shock-proof alternating current variable frequency electric motor drives a main shaft to rotate through a belt pulley set, the main shafts are connected with reverse synchronous gear sets after penetrating through the vibration box, and each main shaft is provided with two sets of eccentric block sets. According to the electric variable frequency amplitude modulation vibration head, the magnitude of excitation force is adjusted by changing the input frequency of the shock-proof alternating current variable frequency electric motors and meanwhile the size of the eccentric torque of the eccentric block sets is adjusted, and therefore amplitude modulation is achieved. When used for vibration pipe-driven pile foundation construction of the complex stratum, the electric variable frequency amplitude modulation vibration head is high in construction efficiency, capable of allowing pile quality to be more reliable and lower in cost.
Description
Technical field
The utility model relates to a kind of electric frequency conversion amplitude modulated oscillations head for building pile foundation construction.
Background technology
Vibration head is widely used in building pile foundation construction, utilizes vibration head device can control the quality of stake, improves the efficiency of construction of stake, cost-saving.The vibration head of existing construction equipment coupling is divided into two classes.One class is hydraulic vibration head, can frequency conversion amplitude modulation, and it needs complicated hydraulic system, valuable Hydraulic Elements, equipment investment is large, consumes energy high in use procedure, regularly replace hydraulic oil.Another kind of is electric vibrating head, and it comprises electric frequency conversion vibration head and electric hydaulic amplitude modulated oscillations head, and they have certain limitation in using.Electric frequency conversion vibration head is the exciting force that changes vibration head by the frequency of change motor.Vibration head all will be through the intrinsic frequency value of supporting vibrating device for it in starting of oscillation and stopped process, there is serious covibration in vibration head and supporting vibrating device now, can affect electrical distribution system stability and application life on pile frame device, seriously can cause the accident.Electric hydaulic amplitude modulated oscillations head is the eccentric force distance of adjusting vibration head eccentric block by hydraulic-driven, has solved vibration head and the resonance problem that mates vibrating device, but operating structure complexity, cost is high, and fault rate is high, when normal operation, exciting force is constant, and the scope of application is narrow.
Summary of the invention
In order to overcome the above problems, the utility model provides a kind of electric frequency conversion amplitude modulated oscillations head, adopt shatter-proof ac variable-frequency electric motor, utilize centrifugal force to adjust eccentric force distance, the eccentric block structure of spring automatic reset, control exciting force and amplitude by adjusting the frequency of shatter-proof ac variable-frequency electric motor, in order to realize the pile vibrosinking of different rock-layers.
The technical solution adopted in the utility model is: electric frequency conversion amplitude modulated oscillations head, frame is connected with vibrating bin, pressurization assembly pulley and lifting tackle group are installed in the upper end of frame, symmetrical damping spring group one end of installing is connected with frame, the other end is connected with vibrating bin, the two ends of vibrating bin are a shatter-proof ac variable-frequency electric motor of symmetrical installation respectively, every shatter-proof ac variable-frequency electric motor drives main shaft to rotate by belt pulley set, main shaft is connected with reverse sync gear train through after vibrating bin, and two groups of eccentric block groups are housed respectively on each main shaft.
Above-mentioned electric frequency conversion amplitude modulated oscillations head, the structure of described eccentric block group is: after upper body and lower body are bolted, form axis hole by the endoporus of upper body and the endoporus of lower body, main shaft two side planes contact spacing with the planar slide of axis hole both sides, in axis hole, be provided with spring, spring one end is connected with upper body, and the other end is connected with main shaft.
Above-mentioned electric frequency conversion amplitude modulated oscillations head, the eccentric throw between main shaft and eccentric block group is e, in the time of the endoporus close contact of main shaft and eccentric block group lower body, eccentric throw 0.004m≤e1≤0.015m; In the time of the endoporus close contact of main shaft and eccentric block group upper body, eccentric throw 0.15m≤e
2≤ 0.25m.
The beneficial effects of the utility model are: the exciting force that different rock-soil layers is required and amplitude are different.The utility model has adopted the structure of eccentric block group, and eccentric block group is by upper body, lower body, spring and fastening bolt composition.Eccentric block group as shown in Figure 3, when stationary condition, moves up the barycenter of eccentric block group under the effect of spring force, makes the eccentric force of eccentric block group apart from e
1very little.When motor frequency f reaches certain value f
1time, because the effect of eccentric block group centrifugal force starts Compress Spring, until f reaches maximum value f
2time, spring is completely compressed, eccentric block group as shown in Figure 4, f
1to f
2process be exactly frequency conversion amplitude modulation process.Therefore, the utility model can have been adjusted by the variation of shatter-proof ac variable-frequency electric motor incoming frequency the size of the eccentric force distance of eccentric block group, thereby has also adjusted the size of exciting force, thereby realizes amplitude modulation.The utility model can, according to the situation of on-the-spot soil layer, be adjusted exciting force at any time, and the scope of application is wide.The utility model, by Construction practices on Drop hammer pile driver, for the pile foundation construction of bad ground, demonstrates huge advantage, reaches quality of pile better, and bearing capacity is higher, and efficiency of construction is higher, and cost is lower.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the structural representation (original state) of eccentric block group.
Fig. 4 is the structural representation (duty) of eccentric block group.
The specific embodiment
As depicted in figs. 1 and 2, electric frequency conversion amplitude modulated oscillations head, frame (1) is connected with vibrating bin (2), pressurization assembly pulley (3) and lifting tackle group (4) are installed in the upper end of frame (1), symmetrical damping spring group (5) one end of installing is connected with frame (1), the other end is connected with vibrating bin (2), the two ends of vibrating bin (2) are the symmetrical shatter-proof ac variable-frequency electric motor (6) of installing respectively, every shatter-proof ac variable-frequency electric motor (6) drives main shaft (8) to rotate by belt pulley set (7), main shaft (8) is connected with reverse sync gear train (9) through after vibrating bin (2), two groups of eccentric block groups (10) are housed respectively on each main shaft (8).
As shown in Figure 3, the structure of eccentric block group (10) is: after upper body (11) are connected by bolt (13) with lower body (12), form axis hole (14) by the endoporus of upper body (11) and the endoporus of lower body (12), main shaft (8) two side planes contact spacing with axis hole (14) both sides planar slide, in axis hole (14), be provided with spring (15), spring (15) one end is connected with upper body (11), and the other end is connected with main shaft (8).
Above-mentioned electric frequency conversion amplitude modulated oscillations head, eccentric throw between main shaft (8) and eccentric block group (10) is that e(eccentric throw refers to that the barycenter of eccentric block group is to the distance of the alignment of shafts), in the time of the endoporus close contact of main shaft (8) and eccentric block group (10) lower body (12), eccentric throw 0.004m≤e1≤0.015m; In the time of the endoporus close contact of main shaft (8) and eccentric block group (10) upper body (11), eccentric throw 0.15m≤e
2≤ 0.25m.
Operating principle of the present utility model is: the utility model is the variation of adjusting exciting force by shatter-proof ac variable-frequency electric motor, adjusts the eccentricity of eccentric block group realize luffing by centrifugal force.Shatter-proof ac variable-frequency electric motor drives the rotation of vibrating bin main shaft by belt pulley set, and two main shafts are realized synchronous backward rotation by reverse sync gear train, and two groups of identical eccentric block groups are housed respectively on two main shafts.In the time that motor does not start, eccentric block group as shown in Figure 3, eccentric block group under the effect of spring, the endoporus of guaranteeing eccentric block group lower body reliably with main shaft close contact, now the eccentricity of eccentric block group is e
1(eccentric throw refers to that the barycenter of eccentric block group is to the distance of the alignment of shafts).Actuating motor, due to centrifugal force (F=m ω
2e) effect, in the time that electric machine frequency reaches certain value, spring starts compressed, and along with the increase of frequency, amount of spring compression is increasing, until completely compressed (as Fig. 4).Now the inner hole surface of eccentric block group upper body contacts with main shaft completely, and eccentric throw reaches maximum value e
2.In the centrifugal force of eccentric block group and eccentric throw thereof the frequency change process along with motor, just realize frequency conversion amplitude modulation function.In the time stopping motor, along with the reduction of motor speed, eccentric block group has been got back to again situation as shown in Figure 3 under the effect of spring force.
After the upper body of eccentric block group and lower body are bolted, main shaft two side planes contact spacing with the both sides planar slide of eccentric block group switching centre, and eccentric block group can be moved along Y-direction in the time of work.When stationary condition, under the effect of spring force, the barycenter of eccentric block group is moved up, make the eccentric distance e of eccentric block group
1very little.When motor frequency f reaches certain value f
1time, because the effect of eccentric block group centrifugal force starts Compress Spring, until f reaches maximum value f
2time, spring is completely compressed, eccentric block group as shown in Figure 4, f
1to f
2process be exactly frequency conversion amplitude modulation process.F1 value equals 2-2.5 times of vibrational system intrinsic frequency, is used for alleviating covibration.
Known according to electrodynamic formula:
The output speed of ac variable-frequency electric motor
1.
In formula: the incoming frequency (HZ) of f-motor; The number of poles (as 2,4,6,8 utmost points) of p-motor is got 4 utmost points conventionally.
The rotating speed of main shaft
……②
In formula: i-belt pulley set gearratio; D
2-main shaft upper belt pulley pitch diameter (m)
D
1-motor pulley pitch diameter (m)
The centrifugal force F=m ω of every group of eccentric block
2e(N);
……③
In formula: m-eccentric block group quality (kg); ω-spindle angular speed (1/s);
E-eccentric block group eccentricity (m); The minimum eccentricity (m) of e1-eccentric block group, 0.004≤e1≤0.015;
E
2the maximum eccentric square (m) of-eccentric block group, 0.15≤e2≤0.25
The suffered power N of spring when every group of eccentric block group inactive state
1=K Δ X
1(N); 2.5mg≤N1≤3mg ... 4. in formula: K-spring rate (N/m); Δ X
1-spring initial compression amount (m); G-acceleration of gravity (m/s
2)
According to vibration head intrinsic frequency value, for making resonance amplitude minimum value select N
1value.
Every group of eccentric block group be the stressed value added N of spring during from inactive state to frequency conversion amplitude modulation duty
2=K Δ X
2(N), Δ X
2≤ e
2-e
15.
In formula: Δ X
2the decrement (m) of-spring after eccentric block group inactive state.
Every group of exciting force T=F-N that eccentric block group produces
2=m ω
2e-K Δ X
2(N) ... 6.
Get any moment in every group of eccentric block group frequency conversion amplitude modulation duty and calculate the value of exciting force
Now establishing eccentric moment is e=e ＇, Δ x
2=Δ x
2＇=e ＇-e
1
T=m ω
2e ＇-k(e ＇-e
1)=(m ω
2-k) e ＇+k e
1(N) ... 7.
M, k, e in formula
1be all definite value, along with the increase and decrease of ω, T is also following increase and decrease as seen
1. 2. 3. obtain according to formula
8.
In formula
it is a constant
Hence one can see that, and exciting force T increases and decreases with the increase and decrease of the incoming frequency f of motor
The exciting force T that vibrating bin produces
always=4T=4[(m ω
2-k) e ＇+ke
1] (N) ... 9.
The amplitude of vibrating device
10.
In formula: Q-ginseng vibrating device gross mass (kg),
for certain value
Conclude above drawing: f increase → T increase → Δ x
2＇ increase → e ＇ increase → A increases → realizes amplitude modulation, and vice versa.
Therefore, the exciting force that different rock-soil layers is required and amplitude are different, and the utility model can be formulated respectively constructure scheme for different soil layers by frequency conversion amplitude modulation, is conducive to improve efficiency of construction, reduce costs, and reduce energy consumption.
Claims (3)
1. electric frequency conversion amplitude modulated oscillations head, it is characterized in that: frame (1) is connected with vibrating bin (2), pressurization assembly pulley (3) and lifting tackle group (4) are installed in the upper end of frame (1), symmetrical damping spring group (5) one end of installing is connected with frame (1), the other end is connected with vibrating bin (2), the two ends of vibrating bin (2) are the symmetrical shatter-proof ac variable-frequency electric motor (6) of installing respectively, every shatter-proof ac variable-frequency electric motor (6) drives main shaft (8) to rotate by belt pulley set (7), main shaft (8) is connected with reverse sync gear train (9) through after vibrating bin (2), two groups of eccentric block groups (10) are housed respectively on each main shaft (8).
2. electric frequency conversion amplitude modulated oscillations head as claimed in claim 1, it is characterized in that: the structure of described eccentric block group (10) is: after upper body (11) are connected by bolt (13) with lower body (12), form axis hole (14) by the endoporus of upper body (11) and the endoporus of lower body (12), main shaft (8) two side planes contact spacing with axis hole (14) both sides planar slide, in axis hole (14), be provided with spring (15), spring (15) one end is connected with upper body (11), and the other end is connected with main shaft (8).
3. electric frequency conversion amplitude modulated oscillations head as claimed in claim 1 or 2, it is characterized in that: the eccentric throw between main shaft (8) and eccentric block group (10) is e, in the time of the endoporus close contact of main shaft (8) and eccentric block group (10) lower body (12), eccentric throw 0.004m≤e1≤0.015m; In the time of the endoporus close contact of main shaft (8) and eccentric block group (10) upper body (11), eccentric throw 0.15m≤e
2≤ 0.25m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320773877.5U CN203594026U (en) | 2013-11-28 | 2013-11-28 | Electric variable frequency amplitude modulation vibration head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320773877.5U CN203594026U (en) | 2013-11-28 | 2013-11-28 | Electric variable frequency amplitude modulation vibration head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203594026U true CN203594026U (en) | 2014-05-14 |
Family
ID=50674923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320773877.5U Expired - Fee Related CN203594026U (en) | 2013-11-28 | 2013-11-28 | Electric variable frequency amplitude modulation vibration head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203594026U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268624A (en) * | 2015-11-11 | 2016-01-27 | 王存伟 | Vibrator with frequency increased and amplitude changed automatically |
| CN108086103A (en) * | 2017-12-20 | 2018-05-29 | 温州市创新市政建设工程有限公司 | A kind of road construction leveling device that shakes |
| CN108149546A (en) * | 2017-12-20 | 2018-06-12 | 温州市创新市政建设工程有限公司 | A kind of road construction flat device that shakes |
-
2013
- 2013-11-28 CN CN201320773877.5U patent/CN203594026U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268624A (en) * | 2015-11-11 | 2016-01-27 | 王存伟 | Vibrator with frequency increased and amplitude changed automatically |
| CN108086103A (en) * | 2017-12-20 | 2018-05-29 | 温州市创新市政建设工程有限公司 | A kind of road construction leveling device that shakes |
| CN108149546A (en) * | 2017-12-20 | 2018-06-12 | 温州市创新市政建设工程有限公司 | A kind of road construction flat device that shakes |
| CN108086103B (en) * | 2017-12-20 | 2020-01-31 | 中铁十八局集团北京工程有限公司 | vibration leveling device for road construction |
| CN108149546B (en) * | 2017-12-20 | 2020-02-21 | 武汉天创市政建设工程有限公司 | Road construction is with flat ware that shakes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20141128 |
|
| EXPY | Termination of patent right or utility model |