CN1569601A - Elevator hydraulic system employing energy-saving oil cylinder - Google Patents
Elevator hydraulic system employing energy-saving oil cylinder Download PDFInfo
- Publication number
- CN1569601A CN1569601A CNA2004100182133A CN200410018213A CN1569601A CN 1569601 A CN1569601 A CN 1569601A CN A2004100182133 A CNA2004100182133 A CN A2004100182133A CN 200410018213 A CN200410018213 A CN 200410018213A CN 1569601 A CN1569601 A CN 1569601A
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- cylinder
- hydraulic
- elevator
- energy
- ram
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Links
- 238000005086 pumping Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 11
- 239000010720 hydraulic oil Substances 0.000 description 9
- 238000004146 energy storage Methods 0.000 description 7
- 230000001174 ascending effect Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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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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- Elevator Control (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The invention discloses an elevator hydraulic system using energy saving cylinder. It includes elevator special energy saving hydraulic cylinder made up of fixed ram type cylinder, mobile ram type cylinder and fixed ram. The external surface of the mobile ram type cylinder matches with the fixed ram cylinder in sliding way, the internal surface matches with the fixed ram in sliding way. One end of the oilway in the fixed ram is connected to working cavity of the mobile ram cylinder, another end is connected to the hydraulic cylinder; the mobile block is fixed on the top of the mobile ram cylinder, the elevator steel rope is connected to the elevator car system through mobile blocks; one end of the hydraulic control valve system is connected to the hydraulic power pump station, another end is connected to the oil cavity of the fixed ram cylinder. It balances a majority of weight of car system through the special energy saving hydraulic cylinder and the connected hydraulic accumulator, the elevator absorbs energy downwards, and releases energy upwards.
Description
Affiliated technical field
The present invention relates to the control system of elevator, relate in particular to a kind of elevator hydraulic system that adopts energy saving cylinder.
Background technology
Hydraulic elevator is because the machine room flexible arrangement is convenient, building hoistway structure does not stress, and utilized that the hydrostatic drive load-carrying capacity is big, advantage such as infinite speed variation and motion are steady, it is compared with the towed elevator of same size, low price is debugged easy to maintenance.Thereby in recent decades, hydraulic elevator has obtained developing rapidly in various countries.
Because general hydraulic elevator is not with counterweight, therefore rely on the power system acting during ascending for elevator fully, that works relies on counterweight that a part of power is provided unlike towed elevator, the efficient of adding hydraulic power system is not high, so the installed power of hydraulic elevator generally is 2～3 times of towed elevator.And hydraulic elevator is descending by the car self gravitation, and generally consumption systems energy not so the energy consumption contrast does not have installed power high like that, but still reaches more than 1.5 times of towed elevator.Therefore, reducing installed power and energy consumption is to improve the key of the hydraulic elevator market competitiveness.
About the patent of hydraulic elevator energy-conserving control technology and achievement in research mainly in the following aspects: 1.. the energy-saving scheme of band mechanical counterweight mechanism.Mainly contain piston cylinder band counterweight and plunger case band counterweight dual mode, can reduce installed power and energy consumption significantly, but increased the complexity of elevator machine structure.2.. adopt the energy-saving scheme of energy storage.Mainly be that U.S. Pat 4761953, US4638888 and Japanese Patent JA08165076, JA08217346 have introduced the energy-conservation hydraulic elevator control system of employing energy storage respectively.These systems all adopt the two-way ram cylinder, are applicable to draw the traction-type structure, and top of building is stressed.3.. the volumetric speed control technology that adopts variable-frequency motor to drive.Traditional valve control hydraulic elevator, owing to adopt throttling governing, energy consumption is big, and efficient is low, and adopts frequency conversion volumetric speed control technology, and no throttling and excess flow loss though this system is energy-conservation, do not reduce installed power.
Summary of the invention
The purpose of this invention is to provide a kind of elevator hydraulic system that adopts energy saving cylinder, hydraulic actuating cylinder is connected with energy storage, played and do not needed most of weight that mechanical counterweight just can balance lift car system, well utilized simultaneously the power savings advantages of hydraulic accumulator again, reduced the installed power and the energy consumption of hydraulic elevator significantly, and engineering practicability is strong.
For achieving the above object, technical scheme of the present invention is as follows:
The present invention includes energy saving cylinder, hydraulic accumulator, the hydraulic power pumping plant, hydraulic control valve system, the elevator cage system, wherein: energy saving cylinder is made up of fixed leg plug cylinder, mobile plunger cylinder and non-movable piston, mobile plunger cylinder outside face and fixed leg plug cylinder bearing fit, and inside face and non-movable piston bearing fit have oil duct in the non-movable piston.Oil duct one end in the non-movable piston directly communicates with the work cavity volume of mobile plunger cylinder, and the other end links to each other with hydraulic accumulator; Movable pulley is fixed on the top of the mobile plunger cylinder of energy saving cylinder, and elevator wire rope is connected with the elevator cage system by movable pulley; One end of hydraulic control valve system is connected with the hydraulic power pumping plant and the other end is connected with the oil pocket of fixed leg plug cylinder.
The present invention compares with background technology, and the useful effect that has is:
It has formed energy-saving hydraulic system jointly by hydraulic power pumping plant, fluid control valve, energy-conserving hydraulic cylinder and energy storage.Because the unique texture of energy-conserving hydraulic cylinder, when balance lift car overwhelming majority weight, not needing increases counterweight in addition, has eliminated shortcomings such as the stressed and tunnel dimension of the caused increase hoistway of use mechanical counterweight.When lift car was descending simultaneously, the hydraulic accumulator that is connected with the energy-conserving hydraulic cylinder absorbed energy; During ascending for elevator, be stored in the required energy of energy supplement ascending for elevator in the hydraulic accumulator.The present invention can significantly reduce the installed power of hydraulic elevator system.The scheme of the reduction installed power that the present invention proposes both can be applied in the valve control hydraulic elevator system, also can be applied in the frequency conversion volumetric speed control modulated pressure elevator device.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural principle scheme drawing of the present invention;
Fig. 2 is an energy saving cylinder structural principle scheme drawing among the present invention.
Among the figure: 1. energy saving cylinder, 2. hydraulic oil pipe, 3. hydraulic accumulator, 4. hydraulic power pumping plant, 5. hydraulic oil pipe, 6. hydraulic control valve system, 7. hydraulic tubing, 8. fixed leg plug cylinder, 9. mobile plunger cylinder, 10. non-movable piston, 11. lift car systems, 12. elevator wire ropes, 13. movable pulleys.
The specific embodiment
As shown in Figure 1, the present invention includes energy saving cylinder 1, hydraulic accumulator 3, hydraulic power pumping plant 4, hydraulic control valve system 6, elevator cage system 11, wherein: energy saving cylinder 1 is made up of fixed leg plug cylinder 8, mobile plunger cylinder 9 and non-movable piston 10, mobile plunger cylinder 9 outside faces and fixed leg plug cylinder 8 bearing fits, and inside face and non-movable piston 10 bearing fits, having oil duct in the non-movable piston 10. oil duct one end in the non-movable piston 10 directly communicates with the work cavity volume of mobile plunger cylinder 9, and the other end links to each other with hydraulic accumulator 3 by hydraulic oil pipe 2; Movable pulley 13 is fixed on the top of the mobile plunger cylinder 9 of energy-conserving hydraulic cylinder 1, and elevator wire rope 12 is connected with elevator cage system 11 by movable pulley 13; One end of hydraulic control valve system 6 is connected with hydraulic power pumping plant 4 by hydraulic oil pipe 5 and the other end passes through hydraulic oil pipe 7 and is connected with the oil pocket of fixed leg plug cylinder 8.
Two operating modes of following separatory piezoelectricity ladder car uplink and downlink illustrate the principle of work of this system.
As shown in Figure 2, at first make the following assumptions:
(1) the unloaded quality of lift car system is m
1, the variable load quality of lift car is m
2
(2) oil pressure in the fixed leg plug cylinder 8 is p
1, p
1The F that exerts oneself to be upwards
1
(3) oil pressure in the mobile plunger cylinder 9 is p
2, p
2Upwards application force is F
2
(4) moving velocity of elevator rising or decline is made as v, and g is an acceleration due to gravity.
Up operating mode:
When hydraulic power pumping plant 4 by fluid control valve 6 and hydraulic oil pipe 5,7 during to the epitrochoidal chamber fuel feeding of the fixed leg plug cylinder 8 of energy-conserving hydraulic cylinder 1, mobile plunger cylinder 9 in the energy-conserving hydraulic cylinder 1 moves up, energy storage 3 is by the epitrochoidal chamber fuel feeding of the oil duct in the non-movable piston 10 of hydraulic oil pipe 2 and energy-conserving hydraulic cylinder 1 to mobile plunger cylinder 9 simultaneously, release energy, promote plunger case 9 and move up, it is up that mobile plunger cylinder 9 promotes lift car.
The required theoretical power of load can be expressed as during ascending for elevator:
W
1＝(m
1+m
2)·g·v (1)
Energy storage balance portion car weight, the installed power that provides are W
2:
W
2＝F
2·v/2 (2)
In the ideal case, F
2max=2m
1G, but elevator when descending by the elevator deadweight, so F
2＜2m
1G gets F
2=2 α m
1G, 0＜α＜1, α is the counterweight coefficient.
So required motor installed power is W
3:
W
3＝[(1-α)·m
1+m
2]·g·v (3)
Motor installed power under the ideal state is:
W
3＝m
2·g (4)
Descending operating mode:
When elevator is descending, fluid in the fixed leg plug cylinder 8 in the energy saving cylinder 1 flows back to hydraulic power pumping plant 4 by hydraulic oil pipe 5,7 and fluid control valve 6, the fluid in the mobile plunger cylinder 9 flows back to hydraulic accumulator 3 by oil duct in the non-movable piston 10 and hydraulic oil pipe 2 in the energy-conserving hydraulic cylinder 1 simultaneously, oil pressure raises in the hydraulic accumulator 3, absorbs energy.
Descending operating mode mainly is to utilize the deadweight of car and load-carrying, does not need the power pumping plant that energy is provided, and hydraulic accumulator can also stored energy as mentioned above.Needed installed power when load carrying ability was maximum when the required installed power of whole service process was ascending for elevator is regulated the counterweight factor alpha in (3) formula, i.e. the non-movable piston of the type of choose reasonable energy storage and capacity and energy saving cylinder to p
2Effective active area, can make installed power be reduced to desirable size.
Claims (1)
1, a kind of elevator hydraulic system that adopts energy saving cylinder is characterized in that comprising energy saving cylinder (1), hydraulic accumulator (3), hydraulic power pumping plant (4), hydraulic control valve system (6), elevator cage system (11); Wherein: energy saving cylinder (1) is made up of fixed leg plug cylinder (8), mobile plunger cylinder (9) and non-movable piston (10), mobile plunger cylinder (9) outside face and fixed leg plug cylinder 8 bearing fits, and inside face and non-movable piston (10) bearing fit, non-movable piston has oil duct in (10).Oil duct one end in the non-movable piston (10) directly communicates with the work cavity volume of mobile plunger cylinder (9), and the other end links to each other with hydraulic accumulator (3); Movable pulley (13) is fixed on the top of the mobile plunger cylinder (9) of energy-conserving hydraulic cylinder (1), and elevator wire rope (12) is connected with elevator cage system (11) by movable pulley (13); One end of hydraulic control valve system (6) is connected with hydraulic power pumping plant (4) and the other end is connected with the oil pocket of fixed leg plug cylinder (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100182133A CN1270960C (en) | 2004-05-08 | 2004-05-08 | Elevator hydraulic system employing energy-saving oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100182133A CN1270960C (en) | 2004-05-08 | 2004-05-08 | Elevator hydraulic system employing energy-saving oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1569601A true CN1569601A (en) | 2005-01-26 |
| CN1270960C CN1270960C (en) | 2006-08-23 |
Family
ID=34479406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100182133A Expired - Fee Related CN1270960C (en) | 2004-05-08 | 2004-05-08 | Elevator hydraulic system employing energy-saving oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1270960C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896135A (en) * | 2014-04-23 | 2014-07-02 | 曾梓 | Energy-saving elevator |
| CN111689341A (en) * | 2019-03-15 | 2020-09-22 | 上海煊凝机电制造有限公司 | Energy-saving hydraulic oil cylinder lifting system |
| CN113247784A (en) * | 2021-03-29 | 2021-08-13 | 武汉船用机械有限责任公司 | Crane with a movable crane |
-
2004
- 2004-05-08 CN CNB2004100182133A patent/CN1270960C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896135A (en) * | 2014-04-23 | 2014-07-02 | 曾梓 | Energy-saving elevator |
| CN103896135B (en) * | 2014-04-23 | 2017-02-15 | 曾梓 | Energy-saving elevator |
| CN111689341A (en) * | 2019-03-15 | 2020-09-22 | 上海煊凝机电制造有限公司 | Energy-saving hydraulic oil cylinder lifting system |
| CN113247784A (en) * | 2021-03-29 | 2021-08-13 | 武汉船用机械有限责任公司 | Crane with a movable crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1270960C (en) | 2006-08-23 |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Xiwu Elevator Co., Ltd. Assignor: Zhejiang University Contract fulfillment period: 2009.6.4 to 2014.6.3 contract change Contract record no.: 2009330001444 Denomination of invention: Elevator hydraulic system employing energy-saving oil cylinder Granted publication date: 20060823 License type: Exclusive license Record date: 2009.6.22 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.4 TO 2014.6.3; CHANGE OF CONTRACT Name of requester: ZHEJIANG XIWU ELEVATOR CO., LTD. Effective date: 20090622 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060823 Termination date: 20130508 |