CN1413900A - Hydraulic elevator system of improvement running performance by accumulator - Google Patents
Hydraulic elevator system of improvement running performance by accumulator Download PDFInfo
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- CN1413900A CN1413900A CN01132003A CN01132003A CN1413900A CN 1413900 A CN1413900 A CN 1413900A CN 01132003 A CN01132003 A CN 01132003A CN 01132003 A CN01132003 A CN 01132003A CN 1413900 A CN1413900 A CN 1413900A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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Abstract
A hydraulic elevator system using energy accumulator to improve its running performance features that a drive motor whose speed is regulated by changing voltage and frequency is used to change the flow of hydraulic pump. It is composed of cage, asynchronous motor, hydraulic pump electromagnetic valve, oil cylinder, hydraulic energy accumulator and two pressure transducers, which can measure and feed back the pressure of hydraulic pump and oil cylinder to form a pressure closed-loop system for conpensating leakage.
Description
Technical field
The present invention relates to a kind ofly improve the hydraulic elevator system of drive ability with energy storage, this is a kind of by variable voltage variable frequency speed governing drive motor, and the rate of discharge of Hydraulic Pump is changed, and realizes that lift car starts the pulsation-free hydraulic elevator system.
Background technology
Motor speed control system is applied in the hydraulic elevator system, can improve its efficient to a great extent, is considered to a kind of energy-saving hydraulic elevator device.Thereby a kind of constant flow rate Hydraulic Pump provides pressure oil to move up and down car by an electromagnetic valve to oil cylinder, above-mentioned electromagnetic valve is usually as unidirectional stop valve operation, in case the descending generation safety misadventure of elevator, but when electromagnetic valve is subjected to electric magnetization, but reverse-conducting makes elevator descending.Because the deadweight of car, the pressure oil in oil cylinder and the pipeline thereof is under certain pressure constantly.When said pump during by an Induction Motor-Driven, speed control system is regulated rotating speed of motor by the variable voltage variable frequency technology in the scope of broad, move up and down car thereby change hydraulic pressure delivery side of pump oil mass.
Yet in common hydraulic efficiency pressure system, the leakage of oil is that inevitably therefore, the actual speed of rotating speed of motor and car is nonsynchronous.A Hydraulic Pump is promptly arranged at low-speed running but the scope that car does not start.When elevator turns round according to start command signal, produced the problem of Vibration on Start-up and human discomfort.
In order to overcome this problem, method the earliest is to export oil in advance according to corresponding spillage, or in other words, a low speed is started motor but model signals that the bias model signal and that do not start car drives car superposition mutually, leakage is compensated just, the car smooth starting.
According to this kind method, in order to reduce bias model (signal) that Vibration on Start-up obtains is to serve as with reference to determining with the spillage under certain load and the uniform temperature, and the oil leakage quantity under the real-world operation state is the calculating that the leakage of oil amount of the temperature of load, fuel tank according to car and each oil pump, valve is done.But the leakage of oil amount of Hydraulic Pump changes with the difference in the oil pump manufacturing, and along with the time changes gradually, the leakage compensation of oily gentle load is difficult to draw a precise analytic model.Therefore, correctly detecting the leakage of oil amount is difficult to reduce Vibration on Start-up, because bias model (signal) is definite by calculating indirectly, thereby the effect of reduction Vibration on Start-up is restricted.
Another kind method provides the means that start compensation, the oil pressure of hydraulic pressure delivery side of pump oil pressure and oil cylinder one side is complementary (differential pressure is a predetermined value), restarts elevator.Start compensating device and that is to say that according to difference a bias model of the inlet outlet pressure differential of boiler check valve compensates based on the delivery pressure of the oil pressure of oil cylinder and Hydraulic Pump.Above-mentioned pressure reduction is the value that records according to actual, is not subjected to the influence of fluctuations of each Hydraulic Pump leakage of oil amount.As long as it is any to the feeling Vibration on Start-up of human body that car does not produce, pressure reduction can be set at a negative code, also can be set at zero.Application number is that 91101675 Chinese patent discloses said method.
Application number is that 98800390 Chinese patent discloses another kind of pressure compensated method, this method relies on an oil cylinder control cock to regulate, when the car low cruise, adjusting is finished (with the leakage of compensation hydraulic efficiency pressure system) by valve cell, when the car high-speed cruising, the speed setting of car is finished by the adjusting to motor.
In the hydraulic elevator system technical scheme of all disclosed employing bunchers, the problem that exists is common, promptly because the oil leakage in the system, make that the actual speed of rotating speed of motor and elevator is nonsynchronous, this asynchrony phenomenon shows and is the vibration of elevator and impact in the start-up course.The purpose of invention is in order to reduce this minimum degree that impacts.The method that is compensated oil leakage quantity by bias model indirectly can not be applicable under the situation of variations such as load, oil temperature, Hydraulic Pump Mismachining tolerance, adopts pressure regulating method to start compensation higher precision can be provided.But because car is very big from the liquid rigidity that exports to the electromagnetic valve entrance side of Hydraulic Pump before setting in motion, and the pulsating nature of the fugitiveness of the rotation of motor when low speed, Hydraulic Pump delivery rate makes pressure control very difficult.
Summary of the invention
Purpose of the present invention mainly is to provide a kind of and starts steadily and the stable hydraulic elevator system of pressure control.
For reaching above-mentioned purpose, the inventor has designed a kind of like this hydraulic elevator system, and it is made of car, asynchronous dynamo, Hydraulic Pump, electromagnetic valve, oil cylinder, hydraulic accumulator and pressure transformer etc.The car of hydraulic elevator system can move in car hoistway up or down.-Induction Motor-Driven Hydraulic Pump provides pressure oil by an electromagnetic valve to oil cylinder.The speed command of this asynchronous dynamo is sent by the program of driving, control and administrative section, is realized the vector controlled of motor frequency change transformation simultaneously by it.
The oil pressure of hydraulic pressure delivery side of pump oil pressure and oil cylinder is respectively by two pressure transmitter measurements, and feedback forms a pressure circle system, and the spillage of direct compensation hydraulic efficiency pressure system is impacted with the startup that prevents elevator.In the exit of Hydraulic Pump one energy storage is arranged,, make pressure control more stable, start more steady to improve the math modeling of pressure circle system.
Description of drawings
Can better understand the present invention improves the hydraulic elevator system of drive ability with energy storage technology contents and purpose effect with reference to following accompanying drawing.
Fig. 1 improves the hydraulic elevator system of drive ability and the scheme drawing of control setup thereof for the present invention with energy storage;
Fig. 2 improves the speed curve diagram of hydraulic elevator system in the ascending for elevator process of drive ability with energy storage for the present invention;
Fig. 3 improves the speed curve diagram of hydraulic elevator system in the descending process of elevator of drive ability with energy storage for the present invention.
The specific embodiment
Fig. 1 improves the hydraulic elevator system of drive ability and the scheme drawing of control setup thereof for the present invention with energy storage.As shown in the figure, the present invention comprises elevator hoistways 13 with the hydraulic elevator system that energy storage improves drive ability, be embedded in the oil cylinder 11 at elevator hoistways 13 pit places, inject the pressure oil of oil cylinder 11, piston 14 by the pressure oil support, be fixed on the car 12 of piston 14 upper ends, motor 2, Hydraulic Pump 4, the elevator control that links to each other with motor 2, management, actuator 1 and rotary encoder 3, the electromagnetic valve 10 that links to each other with oil cylinder 11 with Hydraulic Pump 4, measure the pressure transformer 7 of electromagnetic valve 10 inlets and outlet oil pressure respectively, 8, and respectively Hydraulic Pump 4 and oil cylinder 11 are linked to each other with fuel tank 6 with manual oil drain valve 15 by by pass valve 5.Drive car 12 and undertaken by an oil pump 4, this oil pump 4 is used for delivery pressure oil between fuel tank 6 and oil cylinder 11.The up and descending of car 12 controlled by an electromagnetic valve 10, and electromagnetic valve 10 plays the function of a shutoff valve usually, and when magnet coil encouraged, it became reverse-conducting.Hydraulic Pump 4 can two-wayly rotate, and when it rotated with a direction, pressure oil backed down the check valve in the electromagnetic valve 10, and pressure oil is delivered to oil cylinder 11, and lift car 12 rises; When control signal 101 effects, electromagnetic valve 10 reverse-conductings, because the deadweight of car 12, pressure oil in oil cylinder 11 and the pipeline thereof is under certain pressure constantly, pressure oil is delivered to fuel tank 6 from oil cylinder 11, and lift car 12 descends, and drives Hydraulic Pump 4 and rotates to another direction, simultaneously motor 2 is in generating state, can by the resistance heating consumed energy or by a controlled inverter with the electric energy feedback grid.Pressure transformer 7 and 8 is used for detecting the oil pressure of oil cylinder 11 and the output oil pressure of Hydraulic Pump 4, with energy storage 9 decomposition pressure closed loop control systems, and the vibration when starting to suppress elevator.Oil pump 4 is driven by an asynchronous dynamo 2.Utilize a coder 3 to measure the rotating speed of motor 2, and,, realize the closed-loop drive of motor 2, thereby regulate the flow of oil pump 4 by frequency converter 1 drive motor 2 by variable voltage variable frequency and vector control technology, and then the speed of regulating car 12.
Fig. 2 is the speed curve diagram that is used for ascending for elevator.With reference to Fig. 2, we can explain " up " operation of hydraulic elevators of the present invention.At T0 constantly, apparatus for controlling elevator receives the command signal that needs ascending for elevator, and controller sends instruction and allows motor 2 to start.This moment, the oil pressure P1 in Hydraulic Pump 4 exits was little more than the oil pressure P2 at oil cylinder 11 places, if this moment is with regard to the rate of load application curve, because the leakage of hydraulic efficiency pressure system, the speed of the rotating speed of motor 2 and car 12 asynchronous, a motor 2 running will be arranged but zone that car 11 does not start, when motor 2 reached certain rotating speed, this rotating speed was enough to compensate the leakage of hydraulic efficiency pressure system, then oil pressure P1 will increase to the check valve spool that can back down electromagnetic valve 10, make car 12 upward movements.But this moment, motor 2 existing bigger speed and acceleration/accels caused car 12 when starting bigger startup acceleration/accel to be arranged, and the people rides on the car 12 will uncomfortable sensation.If before velocity curve loads, a pre-boot process is arranged, the oil pressure P1 in Hydraulic Pump 4 exits is risen to oil cylinder 11 places oil pressure P2 near, with the leakage of compensation hydraulic efficiency pressure system, then the stationary performance that starts of elevator will increase greatly.When oil pressure P1 reaches a certain predetermined value, promptly constantly during T1, velocity curve at superposition begin on the basis of pretrigger speed to load, elevator is up by predetermined speed.Because velocity curve is to load in the moment that pressure oil backs down check valve, and this moment Hydraulic Pump 4 exits oil pressure P1 and the oil pressure P2 at oil cylinder 11 places be complementary, so there is not uncomfortable Vibration on Start-up phenomenon in car 12.
Velocity curve loading procedure when Fig. 3 is elevator " descending " operation.The same with " up " process, in the descending stage that a pretrigger is also arranged of elevator, motor 2 at first needs forward running so that oil pressure P1 and oil pressure P2 are complementary, but this moment, pressure oil did not back down check valve in the electromagnetic valve 10, and lift car 12 is static.Electromagnetic valve 10 is opened under the effect of control then, and velocity curve begins to load, motor antiport, pressure oil can be from oil cylinder 11 to fuel tank 6 reverse-conductings, elevator moves downwards.Because in the moment that electromagnetic valve 10 is opened, the entrance and exit oil pressure of valve mates, therefore can not produce uncomfortable chatter phenomena.
In a word, the running velocity curve of elevator is divided into two parts, and one is pretrigger speed, and this part is mainly used to offset the leakage of hydraulic efficiency pressure system, because this speed is directly to obtain according to the real-time closed-loop regulating system that is used for, does not therefore have calculation error in theory; Another is normal elevator speed curve.Both superpositions make the hydraulic elevator system smooth running together.Mainly introduce the treating process of pre-boot phase below.
The pre-boot phase of hydraulic elevator system is the compensation process that the loading procedure of oil pressure P1 also is leakage, and it has accomplished in many ways.
The one, the open loop pressure compensating method, promptly with the rotating speed of fixed slope loading motor 2, along with the flow increase of Hydraulic Pump 4, the also corresponding increase of the oil pressure P1 in its exit is till P1 reaches expected value.The shortcoming of this method is to make oil pressure P1 surpass oil pressure P2 if the loading slope is set meeting too much, and pressure oil backs down the check valve in the electromagnetic valve 10, causes uncomfortable phenomenons such as creeping appears in lift car 12; If set too smallly and load slope, then can make the load time long, influence the elevator operating efficiency.
Another kind of oil pressure loading method is to adopt pressure closed loop control pattern, and by the feedback signal of pressure transformer 7 and 8, the rotating speed of real-time regulated motor 2 loads and be stabilized in a predetermined value with oil pressure.Use suitable control algorithm, can accomplish does not have pressure overshoot fast in the process of pressure-loaded.The present invention adopts this kind pressure-loaded process exactly.
In the system of Fig. 1, because the pre-boot phase of elevator, pressure oil does not back down the check valve of electromagnetic valve 10, so the later part in electromagnetic valve 10 exits and being not included in the pressure circle system.Pressure circle system should be by forming with the lower part: motor 2, Hydraulic Pump 4, fuel tank 6, oil pocket, pressure transformer 7 and 8 from fuel tank 6 to electromagnetic valve in the oil pipe of 10 inflow point.So just cause a problem: because the oil pocket volume in the oil pipe of 10 inflow point is little from fuel tank 6 to electromagnetic valve in the system, liquid rigidity is big, and the subtle change of flow will make oil pressure P1 alter a great deal.Because Hydraulic Pump 4 flow pulsation and the rotary speed unstabilizations of motor 2 when low-speed running own are decided, pressure circle system is inevitable in the pulsation of pre-boot phase flow, therefore oil pressure P1 is difficult to accurately control, the final like this traveling comfort can influence elevator and start the time.
In order to improve this situation, the present invention adds an energy storage 9 in the exit of Hydraulic Pump 4, to suppress the fluctuation of oil pressure P1, make pressure circle system can with pressure stability be controlled on the expected value.But the Capacity Selection of energy storage 9 must be suitable.Excessive as capacity, then pressure-responsive is slack-off, influences the operating efficiency of elevator.The Capacity Selection of energy storage is that 0.15L-0.5L is suitable, this moment adjustment pressure closed loop system control algorithm and parameter thereof, the pressure P 1 in Hydraulic Pump 4 exits quick the is stabilized on a certain expected value, and elevator does not have uncomfortable vibration in startup, acceleration, stable speed operation, deceleration and stopped process.
Claims (2)
1. hydraulic elevator system that improves drive ability with energy storage, comprise motor (2), Hydraulic Pump (4), oil cylinder (11), car (12), the elevator control that links to each other with motor (2), management, actuator (1) and rotary encoder (3), the electromagnetic valve (10) that links to each other with oil cylinder (11) with Hydraulic Pump (4), measure the pressure transformer (7) of electromagnetic valve (10) inlet and outlet oil pressure respectively, (8), and respectively Hydraulic Pump (4) and oil cylinder (11) are linked to each other with fuel tank (6) with manual oil drain valve (15) by by pass valve (5), it is characterized in that: be connected with an energy storage (9) that is used for stablizing pressure fluctuation with Hydraulic Pump (4) exit; When elevator starts, form a closed loop feedback system by pressure transformer (7) and (8) of oil pressure in the outlet oil pressure of Hydraulic Pump (4) and the oil cylinder (11), with the quick and non-overshoot of the oil pressure of Hydraulic Pump (4) rise to oil pressure in the oil cylinder near.
2. hydraulic elevator system as claimed in claim 1 is characterized in that: energy storage is installed on the exit of Hydraulic Pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011320036A CN1228229C (en) | 2001-10-25 | 2001-10-25 | Hydraulic elevator system of improvement running performance by accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011320036A CN1228229C (en) | 2001-10-25 | 2001-10-25 | Hydraulic elevator system of improvement running performance by accumulator |
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| Publication Number | Publication Date |
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| CN1413900A true CN1413900A (en) | 2003-04-30 |
| CN1228229C CN1228229C (en) | 2005-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011320036A Expired - Fee Related CN1228229C (en) | 2001-10-25 | 2001-10-25 | Hydraulic elevator system of improvement running performance by accumulator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325360C (en) * | 2003-05-21 | 2007-07-11 | 上海三菱电梯有限公司 | Method of improving hydraulic elevator operation performance possessing energy storage device |
| EP2123593A1 (en) * | 2008-05-21 | 2009-11-25 | Manitowoc Crane Group France SAS | Electro-hydraulic leak compensation |
| CN100586831C (en) * | 2007-09-25 | 2010-02-03 | 上海三菱电梯有限公司 | Frequency-changing hydraulic elevator system |
| CN102720665A (en) * | 2012-07-03 | 2012-10-10 | 苏州张扬能源科技有限公司 | Energy consumption reduction hydraulic pump device |
| CN103241606A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Electro-hydraulic hybrid driving mine lifting device and control method thereof |
| CN113358300A (en) * | 2021-05-27 | 2021-09-07 | 中冶赛迪工程技术股份有限公司 | Hydraulic system pipeline leakage state detection system |
-
2001
- 2001-10-25 CN CNB011320036A patent/CN1228229C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325360C (en) * | 2003-05-21 | 2007-07-11 | 上海三菱电梯有限公司 | Method of improving hydraulic elevator operation performance possessing energy storage device |
| CN100586831C (en) * | 2007-09-25 | 2010-02-03 | 上海三菱电梯有限公司 | Frequency-changing hydraulic elevator system |
| EP2123593A1 (en) * | 2008-05-21 | 2009-11-25 | Manitowoc Crane Group France SAS | Electro-hydraulic leak compensation |
| US8167154B2 (en) | 2008-05-21 | 2012-05-01 | Manitowoc Crane Group France Sas | Electrohydraulic leak compensation |
| CN101585498B (en) * | 2008-05-21 | 2013-07-03 | 马尼托沃克起重机集团（法国）公司 | Electro-hydraulic leak compensation |
| CN102720665A (en) * | 2012-07-03 | 2012-10-10 | 苏州张扬能源科技有限公司 | Energy consumption reduction hydraulic pump device |
| CN103241606A (en) * | 2013-05-22 | 2013-08-14 | 太原理工大学 | Electro-hydraulic hybrid driving mine lifting device and control method thereof |
| CN103241606B (en) * | 2013-05-22 | 2014-11-05 | 太原理工大学 | Electro-hydraulic hybrid driving mine lifting device and control method thereof |
| CN113358300A (en) * | 2021-05-27 | 2021-09-07 | 中冶赛迪工程技术股份有限公司 | Hydraulic system pipeline leakage state detection system |
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| Publication number | Publication date |
|---|---|
| CN1228229C (en) | 2005-11-23 |
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