CN100458188C - Hydraulic exciting device - Google Patents
Hydraulic exciting device Download PDFInfo
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- CN100458188C CN100458188C CNB2007100622669A CN200710062266A CN100458188C CN 100458188 C CN100458188 C CN 100458188C CN B2007100622669 A CNB2007100622669 A CN B2007100622669A CN 200710062266 A CN200710062266 A CN 200710062266A CN 100458188 C CN100458188 C CN 100458188C
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Abstract
The invention discloses a hydraulic exciting device, comprising conversion control system, hydraulic pump station and exciting oil cylinder. The hydraulic pump station comprises conversion motor and it also comprises twin pump, vibration pump, oil supply valve, overflow valve, electromagnetic switching valve, back-pressure valve group, low-pressure spindle valve and low-pressure overflow valve, which are connected by hydraulic pipes. The vibration pump adopts crank-shaft mechanism to drive the piston move to and fro in cylinder. A pair of outlets of piston cylinder of vibration pump set symmetrically are connected with cavity with bar and cavity without bar of exciting oil cylinder by hydraulic pipes respectively to constitute the closed loop. Because the invention adopts twin piston vibration pump vibration parameters can be adjusted separately in stepless and energy consumption is low. Single-point excitation or multi-point excitation can be adopted to satisfy the requirement for mining with middle frequency and large amplitude. It is suitable for linear vibration equipment and vibration test-bed. Especially it is suitable for mining, power generating, sugar producing and salt producing so on.
Description
Technical field
The present invention relates to a kind of hydraulic exciting device, especially utilize variable-frequency control technique to regulate the rotating speed of oscillating column pump, by the to-and-fro motion of closed hydraulic loop control exciting oil cylinder, to drive the hydraulic exciting device that vibratory equipment produces straight-line oscillation.
Background technique
The exciting mode of the existing vibratory equipment of China is in the inertial excitation mode.The vibrating sieve major parts of wherein producing a large amount of uses in more than 20 hundred million tons of coal screening systems per year all are based on the linear vibrating screen of inertial excitation.For example, ZKX type linear vibrating screen is exactly by the transmission shaft of motor by vee belt driving vibrator, makes vibrator works, and its vibration is an inertial excitation.This vibrator is box eccentric mass structural vibration device, is to realize vibrating as excitation force by the centrifugal force that eccentric mass produces in rotary course, and its mass of vibration is big; Bearing is heated seriously, it is frequent to change bearing; Vibration parameters is difficult to be transferred; Can produce the component of centrifugal force simultaneously in the non-vibration direction, cause the waste of the energy, particularly along with the development of high-speed overload vibratory equipment, this problem is more outstanding, seriously hinders and restricted the fast development of relevant industries.
Along with the development of hydraulics, hydraulic transmission has the specific power height, is easy to realize that advantages such as straight line motion, speed stiffness is big, configuration is flexible big, and power transmission and control are convenient become increasingly conspicuous, thereby has obtained using widely in engineering machinery.According to statistics, present engineering machinery more than 95% has all adopted hydraulics.Therefore people are applied to the vibrating machine industry with hydraulics, pump-control-motor exciting and valve-controlled cylinder formula exciting have occurred.
The pump-control-motor excitation system is to drive the oil hydraulic motor rotation by volume adjustable hydraulic pump, drive the inertia vibration generator rotation by flexible coupling again, though hydraulics is applied to vibrating machine, and has an advantage of itself, but still be inertial excitation fundamentally, just changed the drive system of inertial excitation, it is big still to can't resolve mass of vibration, the problem that power loss is big.Valve control oil cylinder excitation system is that excited frequency and amplitude influence each other, and exciting valve commutating frequency improves, and inflow-rate of water turbine reduces.For the enough big straight-flow system of flow pressure, the increase of the excited frequency that produces along with the exciting valve, descending appears in the amplitude of vibration system, is difficult to satisfy simultaneously the requirement of higher vibration frequency and higher amplitudes.Particularly after excited frequency surpassed certain certain value, it was very difficult or impossible improving amplitude.
Summary of the invention
The problem to be solved in the present invention is the existing problem that pump-control-motor inertial excitation mass of vibration is big, energy consumption is big; Valve control oil cylinder excited frequency and amplitude influence each other, the too high problem that inflow-rate of water turbine is reduced of selector valve commutating frequency.Purpose provides a kind of vibration parameters and easily transfers, and mass of vibration is little, energy consumption is low and the hydraulic exciting device that can satisfy intermediate frequency large amplitude working condition requirement.
Technological scheme of the present invention includes frequency-changing control system, hydraulic power unit, exciting oil cylinder, and frequency-changing control system comprises frequency variator and programmable controller; Hydraulic power unit comprises duplex pump, oscillating column pump, Fill valve, relief valve, solenoid directional control valve, back pressure valve group, low pressure shuttle valve and the low pressure relief valve of variable-frequency motor and pipeline UNICOM; The exciting oil cylinder is the double-action asymmetric servo cylinder, it is characterized in that a pair of plunger case I and the plunger case II of oscillating column pump symmetric arrangement are communicated with the rodless cavity and the rod chamber of exciting oil cylinder respectively by hydraulic tubing, the piston rod of exciting oil cylinder is connected with exciting point on the support structures; Described oscillating column pump is the paired plunger pump of connecting rod, the discharge capacity of its plunger case I and plunger case II is complementary with the area and the amplitude of two acting chambers of exciting oil cylinder respectively, two chambeies of exciting oil cylinder are communicated with by hydraulic tubing with the plunger case I and the plunger case II of the corresponding discharge capacity of oscillating column pump respectively, form closed circuit.
The spool of above-mentioned low pressure shuttle valve is that the spool of two one-way valves fuses.
The working principle of hydraulic exciting device of the present invention is to start: motor start-up, and drive oscillating column pump and duplex pump (oil pump and slippage pump) and start, make the oscillating column pump venting, be full of fluid; Solenoid directional control valve energising transposition then, right position is logical, the excitation system proper functioning; Low pressure shuttle valve and low pressure relief valve are formed shuttle valve group fluid to closed system in system and are played renewal and thermolysis.Replenishing of fluid controlled by Fill valve.Braking: solenoid directional control valve outage during braking, working in position, a left side, absorbs the compression shock that produces in the hydraulic cylinder cavity with relief valve, and one-way valve is used for the self-priming repairing.
Advantage and good effect that the hydraulic exciting device of the present invention's design has are:
(1) this hydraulic exciting device adopts paired plunger oscillating column pump, and every paired column plug cylinder links to each other with two chambeies of asymmetric servo cylinder respectively, forms closed circuit;
(2) adopt the slippage pump feed flow, oscillating column pump does not need special filler opening connected tank, does not promptly need to join oil and considers;
(3) excitation force of this hydraulic exciting device becomes with load in the highest scope of limiting of system.Load is big, and excitation force is big; Load is little, and excitation force is little.Be that excitation force can be realized stepless regulated;
(4) excited frequency of this hydraulic exciting device is regulated by the Frequency Converter Control rotating speed of motor, realizes stepless automatic speed regulation;
(5) this hydraulic exciting device does not rely on selector valve and realizes commutation under the situation of proper functioning, can realize the up-down vibration of exciting oil cylinder automatically;
(6) amplitude of this hydraulic exciting device and the adjusting mutual noninterference frequently of shaking, amplitude is not subjected to the influence of frequency adjustment;
(7) vibration of the exciting oil cylinder of this hydraulic exciting device keeps synchronously automatically because of oscillating column pump self structure and work characteristics.
Hydraulic exciting device of the present invention is used for the equipment of all straight-line oscillations such as factory, mine, metallurgy, generating, sugaring, salt manufacturing, building and the test stand of straight-line oscillation, in particular for the doing of centering fine grit material in the industries such as mine, generating, sugaring, salt manufacturing, wet classification, and coal separation, ore dressing or to the linear vibrating screen of the dehydration of coal and ore, de-mediated, desliming etc.
Description of drawings
Fig. 1 is the structural representation of hydraulic exciting device of the present invention
Among the figure: two the exciting oil cylinders of oscillating column pump drive with four plunger cases are example
1: bent axle 2: live bearing 3: connecting rod 4: plunger case I 5: plunger case II 6: plunger 7: vent valve I 8: Fill valve 9: overflow valve I 10: conduit under fluid pressure 11: solenoid directional control valve 12: counterbalance valve group 13: low pressure shuttle valve 14: vibrating body bearing 15: Pressure gauge 16: vent valve II 17: exciting oil cylinder 18: low pressure relief valve 19: lubricating system 20: shaft coupling 21: variable-frequency motor 22: overflow valve II 23: duplex pump (slippage pump and lubricating oil pump) 24: filter 25: fuel tank
Embodiment
Driving two exciting oil cylinders below in conjunction with accompanying drawing with the oscillating column pump of four plunger cases is that example describes in further detail the present invention.
Hydraulic exciting device among Fig. 1 includes frequency-changing control system, hydraulic power unit, exciting oil cylinder.Frequency-changing control system comprises frequency variator and programmable controller, adopts the PLC programming; Hydraulic power unit comprises variable-frequency motor 21, duplex pump 23 (slippage pump and oil pump), oscillating column pump, Fill valve 8, relief valve I 9, solenoid directional control valve 11, back pressure valve group 12, low pressure shuttle valve 13, low pressure relief valve 18 and hydraulic tubing 10; Exciting oil cylinder 17 is double-action asymmetric servo cylinders, and its number is by the required exciting point configuration of system; Oscillating column pump is mainly by bent axle 1, connecting rod 3, plunger case I 4, plunger case II 5, plunger 6, bleed valve I 7 and form the needed support cylinder body of connecting rod, live bearing 2 etc. and form; The plunger case I 4 of oscillating column pump and the discharge capacity of plunger case II 5 are complementary with the area and the amplitude of two acting chambers of exciting oil cylinder 17 respectively, two chambeies of exciting oil cylinder 17 are communicated with by hydraulic tubing 10 with the plunger case of the corresponding discharge capacity of oscillating column pump respectively, form closed circuit; The piston rod of exciting oil cylinder 17 is connected with exciting point on the support structures.
Variable-frequency motor 21 is connected with the bent axle 1 of oscillating column pump by flexible coupling 20, the rotation of bent axle 1 drives connecting rod and promotes plunger 6 and pump in plunger case I 4 and plunger case II 5, and the piston rod that the connection by hydraulic tubing 10 drives exciting oil cylinder 17 drives load and does together and pump; Low pressure shuttle valve 13 and low pressure relief valve 18 composition shuttle valve groups are upgraded the fluid in the system and are dispelled the heat.
The working procedure of hydraulic exciting device of the present invention is, when variable-frequency motor 21 starts, drive oscillating column pump and duplex pump 23 (oil pump and slippage pump) and start, oscillating column pump is mainly by bent axle 1, connecting rod 3, plunger case I 4, plunger case II5 and plunger 6 and form the needed support cylinder body of connecting rod, live bearing 2 etc. and form; Oil pump is used for to lubrication system 19 fuel feeding, and Fill valve is used for repairing in the epicoele of oscillating column pump plunger case I 4 and plunger case II5 for 8 groups; Behind the bent axle 1 running 0.5S of oscillating column pump, solenoid directional control valve 11 gets electric, changes to the work of right position by meta, is communicated with the oil circuit between oscillating column pump and the exciting oil cylinder 17, makes vibration system enter normal work stage; At this moment, come the vibration frequency of regulating system by the rotating speed of frequency-changing control system control oscillating column pump bent axle 1; Low pressure shuttle valve 13 and low pressure relief valve 18 are formed shuttle valve group fluid to closed system in system and are played renewal and thermolysis; Slippage pump by 8 groups of Fill valves at this moment can be in oil circuit repairing and relief valve 22 make system keep working pressure and satisfy the designed amplitude requirement of system; When shutting down, solenoid directional control valve 11 gains position, a left side, and oil circuit cuts off up and down; Absorb the compression shock that produces in exciting oil cylinder 17 chambeies with the relief valve in the back pressure valve group 12, one-way valve is used for the self-priming repairing; Variable-frequency motor 21 outages, oscillating column pump and duplex pump 23 quit work.
Oscillating column pump for all the other paired plungers drives the exciting cylinder system, and working principle is the same, and just the system unit number zooms in or out.
Claims (2)
1. a hydraulic exciting device includes frequency-changing control system, hydraulic power unit, exciting oil cylinder, and frequency-changing control system comprises frequency variator and programmable controller; Hydraulic power unit comprises duplex pump, oscillating column pump, Fill valve, relief valve, solenoid directional control valve, back pressure valve group, low pressure shuttle valve and the low pressure relief valve that variable-frequency motor and pipeline are communicated with; The exciting oil cylinder is the double-action asymmetric servo cylinder, it is characterized in that a pair of plunger case I (4) and the plunger case II (5) of oscillating column pump symmetric arrangement are communicated with the rodless cavity and the rod chamber of exciting oil cylinder (17) respectively by hydraulic tubing (10), the piston rod of exciting oil cylinder (17) is connected with the exciting point on the support structures; Described oscillating column pump is the paired plunger pump of connecting rod, the discharge capacity of its plunger case I (4) and plunger case II (5) is complementary with the area and the amplitude of two acting chambers of exciting oil cylinder (17) respectively, two chambeies of exciting oil cylinder (17) are communicated with by hydraulic tubing (10) with the plunger case I (4) and the plunger case II (5) of the corresponding discharge capacity of oscillating column pump respectively, form closed circuit.
2. hydraulic exciting device as claimed in claim 1, the spool that it is characterized in that low pressure shuttle valve (13) are that the spool of two one-way valves fuses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100622669A CN100458188C (en) | 2007-07-06 | 2007-07-06 | Hydraulic exciting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100622669A CN100458188C (en) | 2007-07-06 | 2007-07-06 | Hydraulic exciting device |
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| CN101078412A CN101078412A (en) | 2007-11-28 |
| CN100458188C true CN100458188C (en) | 2009-02-04 |
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| CNB2007100622669A Expired - Fee Related CN100458188C (en) | 2007-07-06 | 2007-07-06 | Hydraulic exciting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957295A (en) * | 2010-10-11 | 2011-01-26 | 中南大学 | Pumper arm support fatigue test excitation method and device with adaptive exciting force |
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| JP5682744B2 (en) * | 2010-03-17 | 2015-03-11 | コベルコ建機株式会社 | Swing control device for work machine |
| CN101865180B (en) * | 2010-06-08 | 2012-07-04 | 中舟海洋科技(上海)有限公司 | Static pressure and vibration composite test device for hydraulic tube and connecting joint thereof |
| CN102420552B (en) * | 2011-12-03 | 2014-04-30 | 太原理工大学 | Control loop and control method for improving starting and stopping performance of motor |
| CN102562722A (en) * | 2011-12-26 | 2012-07-11 | 浙江工业大学 | High-frequency electro-hydraulic vibration mechanism |
| CN102840193B (en) * | 2012-09-10 | 2015-01-14 | 太原理工大学 | Water pressure fluctuation excitation device |
| CN106996071B (en) * | 2017-03-20 | 2019-06-11 | 温州大学 | A kind of gas-liquid mixed excitation system of cement pavement rubblizing apparatus |
| CN109115439B (en) * | 2018-08-15 | 2020-01-17 | 武汉智明力强光电系统有限公司 | High-frequency excitation device and control system |
| CN109708838B (en) * | 2019-01-30 | 2023-09-22 | 徐州市全球通精密钢管有限公司 | Crank connecting rod double-cylinder hydraulic high-frequency high-voltage pulse impact test device and method |
| CN110107559B (en) * | 2019-05-29 | 2020-04-03 | 太原科技大学 | Hydraulic control system of hydraulic test bed |
| CN112012899B (en) * | 2020-07-09 | 2021-10-22 | 浙江大学 | Quick reversing hydraulic driving device |
| CN112855672B (en) * | 2021-02-08 | 2023-04-14 | 中国铁建重工集团股份有限公司 | Hot oil flushing and replacing system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1328795A (en) * | 1972-12-12 | 1973-09-05 | Btr Industries Ltd | Fluid operated oscillators |
| FR2700811A1 (en) * | 1993-01-28 | 1994-07-29 | Sta Controle | Device for generating a variable pressure within a liquid |
| JPH07139522A (en) * | 1993-11-12 | 1995-05-30 | Teijin Seiki Co Ltd | Fluid circuit for working cylinder of civil engineering construction machine |
| JPH0860711A (en) * | 1994-08-24 | 1996-03-05 | Teijin Seiki Co Ltd | Fluid circuit for work cylinder of civil engineering construction equipment |
| DE10142023A1 (en) * | 2001-08-28 | 2003-03-20 | Peter Heisler | Hydraulic pulse-generating device e.g. for hydraulic systems, has rotary disc valve fitted with servo-motor as drive |
| US20040101367A1 (en) * | 2001-05-02 | 2004-05-27 | Franz Riedl | Controller for an unbalanced mass adjusting unit of a soil compacting device |
| CN1583289A (en) * | 2004-06-16 | 2005-02-23 | 太原理工大学 | Frequency variable hydraulic vibration exciter |
| CN1593789A (en) * | 2004-07-12 | 2005-03-16 | 山西潞安矿业(集团)有限责任公司 | Pump controlled motor hydraulic excitation device |
-
2007
- 2007-07-06 CN CNB2007100622669A patent/CN100458188C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1328795A (en) * | 1972-12-12 | 1973-09-05 | Btr Industries Ltd | Fluid operated oscillators |
| FR2700811A1 (en) * | 1993-01-28 | 1994-07-29 | Sta Controle | Device for generating a variable pressure within a liquid |
| JPH07139522A (en) * | 1993-11-12 | 1995-05-30 | Teijin Seiki Co Ltd | Fluid circuit for working cylinder of civil engineering construction machine |
| JPH0860711A (en) * | 1994-08-24 | 1996-03-05 | Teijin Seiki Co Ltd | Fluid circuit for work cylinder of civil engineering construction equipment |
| US20040101367A1 (en) * | 2001-05-02 | 2004-05-27 | Franz Riedl | Controller for an unbalanced mass adjusting unit of a soil compacting device |
| DE10142023A1 (en) * | 2001-08-28 | 2003-03-20 | Peter Heisler | Hydraulic pulse-generating device e.g. for hydraulic systems, has rotary disc valve fitted with servo-motor as drive |
| CN1583289A (en) * | 2004-06-16 | 2005-02-23 | 太原理工大学 | Frequency variable hydraulic vibration exciter |
| CN1593789A (en) * | 2004-07-12 | 2005-03-16 | 山西潞安矿业(集团)有限责任公司 | Pump controlled motor hydraulic excitation device |
Non-Patent Citations (8)
| Title |
|---|
| 新型液压激振器. 高满旭等.重型机械，第1期. 1994 |
| 新型液压激振器. 高满旭等.重型机械，第1期. 1994 * |
| 新型电液激振装置的性能研究. 郝建功等.太原理工大学学报，第34卷第6期. 2003 |
| 新型电液激振装置的性能研究. 郝建功等.太原理工大学学报，第34卷第6期. 2003 * |
| 液压激振器振动参数的设计. 于宝成等.煤矿机械，第1期. 2000 |
| 液压激振器振动参数的设计. 于宝成等.煤矿机械，第1期. 2000 * |
| 液压激振技术在振动筛上的应用研究. 王峰山等.煤炭加工与综合利用，第6期. 2004 |
| 液压激振技术在振动筛上的应用研究. 王峰山等.煤炭加工与综合利用，第6期. 2004 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957295A (en) * | 2010-10-11 | 2011-01-26 | 中南大学 | Pumper arm support fatigue test excitation method and device with adaptive exciting force |
| CN101957295B (en) * | 2010-10-11 | 2012-07-11 | 中南大学 | Pumper arm support fatigue test excitation method and device with adaptive exciting force |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101078412A (en) | 2007-11-28 |
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Granted publication date: 20090204 Termination date: 20130706 |