CN202900851U - Structure of frequency conversion hydraulic fluctuating vibration exciter - Google Patents
Structure of frequency conversion hydraulic fluctuating vibration exciter Download PDFInfo
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- CN202900851U CN202900851U CN 201220307648 CN201220307648U CN202900851U CN 202900851 U CN202900851 U CN 202900851U CN 201220307648 CN201220307648 CN 201220307648 CN 201220307648 U CN201220307648 U CN 201220307648U CN 202900851 U CN202900851 U CN 202900851U
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- vibration
- vibration exciter
- frequency conversion
- fluctuating
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Abstract
Disclosed is a structure of a frequency conversion hydraulic fluctuating vibration exciter. Two hydraulic cylinders are used as a vibration exciter body of the frequency conversion hydraulic fluctuating vibration exciter. A piston rod of each hydraulic cylinder is connected with the top portion of each cylinder is a rigid mode. The two hydraulic cylinders are symmetrically installed on centre-of-gravity portions of the two sides of load. A vibrating screen of the hydraulic fluctuating vibration exciter is composed of a plurality of connecting pipelines. Due to periodically forced flow distribution of the vibration exciter body in a hydraulic pipeline, periodical pressure surge in the hydraulic pipeline is generated so that periodical vibration of the pistons and the load of the vibration cylinders is generated with no need for a structure piece, and therefore a system is in an ideal vibration working condition and energy consumption of starting and stopping is low.
Description
Technical field
The utility model relates to hydraulic pressure fluctuation field, especially a kind of structure of variable frequency hydraulic fluctuation vibration exciter.
Background technique
Vibration utilizes and extensively to have penetrated into all trades and professions, and classification relates to vibration ore dressing, vibrating transportation, vibrosieve, vibration dehydration, vibration moulding, vibrates, swing crushing, vibrating shakeout, vibration are pressed road, refuse classification, raw material screening etc.; Simultaneously, the use amount of vibratory equipment is also very large.According to on-the-spot use condition, there is following subject matter in the vibratory equipment of inertial excitation: mass of vibration is large, there be rotatablely moving of dynamic unbalance in inertial excitation, and is large especially on the life-span impact of vibrating machine structural member and bearing.The inertial equipment amount of maintenance is large, checks, to change bearing frequent, and vibrational structure spare cracking phenomena is serious; Motor drives eccentric wheel exciting device, its vibration parameters is difficult to be transferred; The change at random of load is difficult to make quality-spring-damped system to be in more satisfactory vibration operating mode because ginseng is shaken.For proof strength adopts heavy especially structural member, even the part speed reducer also participates in vibration in the situation about having, and power consumption is large like this, mass of vibration is large, the starting and stopping problem such as difficulty of shaking is further serious, advocates energy-saving and cost-reducing today in the whole world, has seriously hindered the development of Chinese national economy.
Summary of the invention
For solving the appeal problem, the technological scheme that the utility model proposes is: utilize with the vibration exciter of two oil hydraulic cylinders as hydraulic pressure fluctuation vibration exciter, the piston rod of oil hydraulic cylinder and cylinder body top are rigidly connected, two oil hydraulic cylinder symmetries are installed in the position of centre of gravity of load both sides, form hydraulic pressure fluctuation vibration exciter vibrating sieve by some connecting pipelines.
The beneficial effects of the utility model are: not only by shock wave device periodically mandatory assignment in hydraulic pipe line, produce periodic pressure surge, thereby make vibration-exciting hydraulic cylinder (9) piston and load produce periodic vibration, and need not to use structural member, within the specific limits, excited frequency is by the frequency variator step-less adjustment; With oil cylinder with utilize hydraulic pressure fluctuation vibration exciter vibrating sieve fixed, can realize utilizing the adjustable controlled of hydraulic pressure fluctuation vibration exciter vibrating sieve frequency by frequency variator, amplitude then can be regulated by relief valve; Amplitude one timing, pressure increases with the raising of excited frequency; Pressure one regularly, the increase of amplitude excited frequency and reducing, system is in more satisfactory vibration operating mode, the required energy consumption of starting and stopping is little.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further detailed.
Fig. 1 is the hydraulic shock excitation system hydraulic schematic diagram;
[0007]Wherein, 1. signal motor; 2. coupling; 3. shock wave device; 4. return tube; 5. oil inlet pipe; 6. accumulator; 7. hydraulic power supply; 8. load; 9. vibration-exciting hydraulic cylinder.
Embodiment
1. the composition of shock wave type high hydraulic shock excitation system and exciting mechanism.
1.1 the shock wave type high hydraulic shock excitation system mainly by: hydraulic power supply (7), shock wave device (3), vibration-exciting hydraulic cylinder (9), accumulator (6) and connecting pipeline form, shown in Fig. 1; Shock wave device is designed to rotary, driven by signal motor (1), and signal motor (1) is by Frequency Converter Control; The hydraulic function that shock wave device (3) need be finished is the position three-way valve function, and guarantees that under the open state be working state, and turn around time is much smaller than its operating time; Vibration-exciting hydraulic cylinder (9) adopts the double-acting asymmetrical cylinder of single rod; Accumulator (6) adopts the high pressure accumulator of diaphragm type.
1
.2 hydraulic shock excitation systems adopt single rod double-acting hydraulic cylinder as the exciting output element, all the time connect the rod chamber of vibration-exciting hydraulic cylinder (9) by pressure duct from the high-voltage oil liquid of hydraulic power unit, and the piston cavity of vibration-exciting hydraulic cylinder (9) is distributed by the oil circuit in the shock wave device, is equipped with interface with high pressure oil inlet pipe (5) and return line (4); Shock wave device during work (3) ceaselessly rotates at the driving lower valve core of signal motor (1), along with the rotation of spool, piston cavity constantly with high pressure oil inlet pipe (5) road interface and return tube (4) road interface alternate conduction.When with the interface conducting of high pressure oil inlet pipe (5) road, high-voltage oil liquid enters piston cavity, makes vibration-exciting hydraulic cylinder (9) form differential cylinder, and the effect that piston is subject to upper and lower cavity pressure reduction moves upward; And during with the interface conducting of return tube (4) road, the immediately step-down of the liquid of piston cavity is discharged, and vibration-exciting hydraulic cylinder this moment (9) moves downward under the effect of rod chamber highly pressurised liquid.Under shock wave device (3) rotates continuously, periodically high pressure feed liquor-low pressure discharge opeing in the piston cavity, so that the piston of vibration-exciting hydraulic cylinder (9) and constantly to-and-fro motion of piston rod band dynamic load, i.e. output vibration.
1.3 the exciting mechanism of hydraulic shock excitation system: the hydraulic shock excitation system of shock wave device (3) control is the follow-up hydraulic transmission system of an open job, but is different from general follow-up hydraulic transmission system.The working procedure of general follow-up hydraulic transmission system is a hydrostatic transmissions process, and the shock wave type high hydraulic shock excitation system is the dynamical system of an overall process.The essence of its system's exciting still belongs to the research category of present most of hydraulic shock excitation system.Difference is that structure and the work ratio of shock wave device carried out rational design and distribution, can satisfy the requirement of various vibration operating modes.Because the special structural design of shock wave device, system in the course of the work, the mandatory assignment by shock wave device (3) produces periodic flowed fluctuation in hydraulic pipe line on the one hand, because the fluctuation of flow has produced corresponding pressure surge in sap cavity and pipeline; Because the open and close of shock wave device valve port in assignment process all are to finish in moment, the moment of valve port switch has produced the hydraulic shock ripple in hydraulic pipe line on the other hand.These two kinds of pressure waves are reflected in the variation of two sap cavity hydrodynamic pressures of oil hydraulic cylinder after stack, and two sap cavity hydrodynamic pressures are applied on the vibration-exciting hydraulic cylinder (9), so that piston moves the coupling power of piston; Because the mandatory assignment of shock wave device (3) is periodic, thereby the motion of vibration-exciting hydraulic cylinder (9) piston also is periodic to-and-fro motion.Because the working state of shock wave device (3) is the open state, be different from general selector valve by slit flow work, thereby the more general hydraulic system of the efficient of system is significantly improved.
2. conclusion: hydraulic pressure fluctuation vibration exciter is the follow-up hydraulic system of an open job, its by shock wave device (3) periodically mandatory assignment in hydraulic pipe line, produces periodic pressure surge, vibrate thereby vibration-exciting hydraulic cylinder (9) piston and load are produced periodically.In the shock wave type high excitation system working procedure, the pressure of piston cavity is lower than the pressure in bar chamber.The peak of piston cavity pressure approximates system pressure, and is basically identical with the minimum in bar chamber.Within the specific limits, excited frequency is by the frequency variator step-less adjustment.With oil cylinder with utilize hydraulic pressure fluctuation vibration exciter vibrating sieve fixed, can realize utilizing the adjustable controlled of hydraulic pressure fluctuation vibration exciter vibrating sieve frequency by frequency variator, amplitude then can be regulated by relief valve; Amplitude one timing, pressure increases with the raising of excited frequency; Pressure one regularly, the increase of amplitude excited frequency and reducing, the starting and stopping energy loss is little.
Claims (1)
1. the structure of variable frequency hydraulic fluctuation vibration exciter, it is characterized in that: with the vibration exciter of two oil hydraulic cylinders as hydraulic pressure fluctuation vibration exciter, the piston rod of oil hydraulic cylinder and cylinder body top are rigidly connected, and two oil hydraulic cylinder symmetries are installed in the position of centre of gravity of load both sides, form by some connecting pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220307648 CN202900851U (en) | 2012-06-28 | 2012-06-28 | Structure of frequency conversion hydraulic fluctuating vibration exciter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220307648 CN202900851U (en) | 2012-06-28 | 2012-06-28 | Structure of frequency conversion hydraulic fluctuating vibration exciter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202900851U true CN202900851U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220307648 Expired - Fee Related CN202900851U (en) | 2012-06-28 | 2012-06-28 | Structure of frequency conversion hydraulic fluctuating vibration exciter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202900851U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070009A (en) * | 2014-07-23 | 2014-10-01 | 姬玉安 | Multi-vibration type vibrating screen |
| CN110939631A (en) * | 2019-12-26 | 2020-03-31 | 长安大学 | Oil-free hydraulic vibration exciter with adjustable frequency and amplitude and adjusting method thereof |
-
2012
- 2012-06-28 CN CN 201220307648 patent/CN202900851U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070009A (en) * | 2014-07-23 | 2014-10-01 | 姬玉安 | Multi-vibration type vibrating screen |
| CN110939631A (en) * | 2019-12-26 | 2020-03-31 | 长安大学 | Oil-free hydraulic vibration exciter with adjustable frequency and amplitude and adjusting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20130628 |