CN108916144B - Gas-liquid combined oil supply system - Google Patents
Gas-liquid combined oil supply system Download PDFInfo
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- CN108916144B CN108916144B CN201810723536.4A CN201810723536A CN108916144B CN 108916144 B CN108916144 B CN 108916144B CN 201810723536 A CN201810723536 A CN 201810723536A CN 108916144 B CN108916144 B CN 108916144B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/06—Use of special fluids, e.g. liquid metal; Special adaptations of fluid-pressure systems, or control of elements therefor, to the use of such fluids
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Abstract
The invention discloses a gas-liquid combined oil supply system, which comprises gas drive oil source equipment and liquid drive oil source equipment, wherein the gas drive oil source equipment comprises a first oil supply pipe, the liquid drive oil source equipment comprises a second oil supply pipe, and the first oil supply pipe and the second oil supply pipe are connected in parallel and are both connected with an oil supply outlet; one end of a first oil supply pipe is connected with the liquid side of the gas-liquid actuator, the other end of the first oil supply pipe is connected with an oil supply outlet, a first electromagnetic directional valve, a first proportional valve and a first one-way valve are connected in series on the first oil supply pipe, and the gas side of the gas-liquid actuator is connected with a high-pressure gas cylinder; one end of the second oil supply pipe is connected with the hydraulic pump, the other end of the second oil supply pipe is connected with the oil supply outlet, and the second oil supply pipe is connected with a second one-way valve and a second proportional valve in series. The invention innovatively combines the gas drive oil source equipment and the liquid drive oil source equipment, realizes high-pressure large-flow output by supplying oil to the gas drive oil source equipment and the liquid drive oil source equipment simultaneously, meets the requirements of special vehicles on high-pressure large-flow output, and has the outstanding advantages of strong reliability, easy maintenance, low cost, small volume and the like.
Description
Technical Field
The invention relates to the technical field of hydraulic oil sources, in particular to a gas-liquid combined oil supply system.
Background
At present, with the continuous development of special vehicle technology, the requirement of a special vehicle on the rapid lifting capability of a load is higher and higher, and in the process of rapid lifting, a hydraulic system which provides lifting power needs to supply a larger flow (oil quantity) so as to enable the load to obtain a faster lifting speed and complete the lifting action. There are two main ways of increasing the flow of a hydraulic system: (1) the discharge capacity and the rotating speed of the hydraulic pump are increased or the number of the hydraulic pumps is increased, (2) high-temperature and high-pressure gas is generated in a combustion mode, so that the stored oil is quickly pushed, and large-flow output is realized.
With the conventional manner (1) described above, although it is theoretically possible to achieve a large flow output by increasing the displacement, the rotational speed, or the number of hydraulic pumps, it is found in practice that: the conventional power source for providing power for the hydraulic pump often cannot meet the actual requirement, because the mode can cause that the output power of the hydraulic pump on the power source has extremely high requirement, the power source must output very high power to meet the normal work of the hydraulic pump, obviously, the conventional hydraulic pump cannot meet the requirement, and if the ultrahigh power source is specially designed, the problems of overhigh cost and difficult popularization and application exist; for the conventional mode (2), because a high-intensity combustion process is inevitable, a combustion generator resistant to ultra-high pressure and ultra-high temperature must be provided, and for the prior art, due to technical bottlenecks in the aspects of materials, structures and the like, it is extremely difficult to design the combustion generator, and mass production is generally difficult, and the combustion generator capable of being designed often has the problems of short service time, low reliability, difficult maintenance and the like; even if a high-strength combustor can be designed reluctantly, the problems of high cost, difficulty in popularization and application and the like still exist.
Therefore, in view of the problems of high requirement on a power source or the need to design a special combustion generator and the like in the conventional manner for increasing the flow rate of the hydraulic system, how to effectively ensure the requirement on the flow rate of the hydraulic system of the special vehicle becomes a technical problem to be solved and a focus of research all the time by a person skilled in the art.
Disclosure of Invention
In order to solve the problems that the requirement on the power source output power of a hydraulic pump is too high or a combustion generator resistant to ultrahigh temperature and ultrahigh pressure needs to be designed in the prior art, the invention innovatively provides a gas-liquid combined oil supply system, which realizes a large-flow oil source in a mode of connecting a gas-driven oil source and a liquid-driven oil source in parallel so as to quickly push stored oil and realize ultrahigh-flow output, thereby better solving various problems in the prior art; the invention not only avoids the problem of large power consumption requirement, but also avoids the combustion process, thereby reducing the maintenance difficulty.
In order to achieve the technical purpose, the invention discloses a gas-liquid combined oil supply system which comprises gas drive oil source equipment and liquid drive oil source equipment, wherein the gas drive oil source equipment comprises a first oil supply pipe, the liquid drive oil source equipment comprises a second oil supply pipe, and the first oil supply pipe and the second oil supply pipe are arranged in parallel and are both connected with an oil supply outlet; one end of the first oil supply pipe is connected with the liquid side of the gas-liquid actuator, the other end of the first oil supply pipe is connected with an oil supply outlet, a first electromagnetic directional valve, a first proportional valve and a first one-way valve are connected in series on the first oil supply pipe, and the gas side of the gas-liquid actuator is connected with a high-pressure gas cylinder; one end of the second oil supply pipe is connected with the hydraulic pump, the other end of the second oil supply pipe is connected with the oil supply outlet, a second one-way valve and a second proportional valve are connected in series on the second oil supply pipe, a liquid suction port of the hydraulic pump is connected with a hydraulic oil tank, and a power input end of the hydraulic pump is connected with the prime motor.
Based on the technical scheme, the invention innovatively combines the oil supply of the hydraulic pump and the oil supply of the high-pressure gas quickly pushing the stored oil, and realizes the high-pressure and large-flow output of the gas-liquid combined oil supply system, thereby solving a plurality of problems in the prior art, avoiding the problem that the prior art needs an ultrahigh-power source (such as a prime motor) for realizing high-pressure and large-flow, and avoiding the problem of designing a combustion generator resistant to ultrahigh pressure and ultrahigh temperature.
Further, the gas drive oil source further comprises a second electromagnetic directional valve and a third one-way valve, the second electromagnetic directional valve and the third one-way valve are connected in series to form a first passage, the first proportional valve and the first one-way valve are connected in series to form a second passage, and the first passage and the second passage are connected in parallel and then connected in series with the first electromagnetic directional valve.
Based on the improved technical scheme, the gas-driven oil source can be reversely supplied with oil through the liquid-driven oil source, the scheme not only enriches the functions of the gas-driven oil source, but also optimizes the structure of a gas-liquid combined oil supply system, and the purpose of reducing the volume of a product is achieved.
Further, in the direction from the second electromagnetic directional valve to the oil supply outlet, the third check valve is a check valve arranged in the reverse direction.
Further, the first electromagnetic directional valve is an electromagnetic directional valve of a power-off normally-off type.
Further, the second electromagnetic directional valve is an electromagnetic directional valve of a power-off normally-off type.
Further, the liquid drive oil source equipment further comprises an overflow valve, and the overflow valve is arranged on the second oil supply pipe.
Further, the overflow valve is disposed between the hydraulic pump and the second check valve.
Further, a manual ball valve is arranged on the air supply pipe between the high-pressure air bottle and the air side of the air-liquid actuator.
Based on the improved technical scheme, the high-pressure gas drive is controlled through the manual ball valve, and the safety of the gas-liquid combined oil supply system can be greatly improved.
Further, a pressure sensor is arranged on the air supply pipe between the high-pressure air bottle and the air side of the air-liquid actuator.
Further, the high-pressure gas cylinder is filled with nitrogen.
The invention has the beneficial effects that: the invention innovatively combines the gas drive oil source equipment and the liquid drive oil source equipment, realizes high-pressure large-flow output by supplying oil to the gas drive oil source equipment and the liquid drive oil source equipment simultaneously, meets the requirements of special vehicles on high-pressure large-flow output, and has the outstanding advantages of strong reliability, easy maintenance, low cost, small volume and the like.
The invention greatly reduces the requirement on the output power of the prime motor through the gas-liquid combined driving oil source structure, compared with the prior art, under the same flow output, the requirement on the output power of the prime motor is only 30-70% of the power required by the liquid driving oil source system, the invention is suitable for a large-tonnage load rapid rotation lifting system (such as a special vehicle), the invention has good use effect, the output high pressure and large flow are stable and controllable, and the invention can meet the requirement of a hydraulic system of the special vehicle.
Drawings
FIG. 1 is a schematic structural diagram of a gas-liquid combined oil supply system.
In the figure, the position of the upper end of the main shaft,
1. a high pressure gas cylinder; 2. a manual ball valve; 3. a gas-liquid actuator; 4. a first electromagnetic directional valve; 5. a second electromagnetic directional valve; 6. a third check valve; 7. a first proportional valve; 8. a first check valve; 9. a prime mover; 10. a hydraulic pump; 11. a hydraulic oil tank; 12. an overflow valve; 13. a second one-way valve; 14. a second proportional valve.
Detailed Description
The gas-liquid combined oil supply system according to the present invention will be explained and explained in detail with reference to the drawings attached to the specification.
As shown in fig. 1, the present embodiment specifically discloses a gas-liquid combined oil supply system, which includes a gas-drive oil source device and a liquid-drive oil source device, where the gas-drive oil source device includes a first oil supply pipe, and the liquid-drive oil source device includes a second oil supply pipe, and the first oil supply pipe and the second oil supply pipe are arranged in parallel and are both connected to an oil supply outlet (which may be referred to as P in fig. 1), so as to implement forward (i.e., in the direction of oil outlet from the oil supply outlet) gas-liquid combined drive.
More specifically, as shown in fig. 1, one end of a first oil supply pipe is connected to the liquid side of the gas-liquid actuator 3, and the other end is connected to the oil supply outlet, a first electromagnetic directional valve 4, a first proportional valve 7 and a first one-way valve 8 are connected in series to the first oil supply pipe, in this embodiment, the first proportional valve 7 is connected in series in sequence, the first one-way valve 8 is arranged in the forward direction to realize control according to the planned flow ratio, so as to realize reverse isolation, and the gas side of the gas-liquid actuator 3 is connected to the high-pressure gas cylinder 1; one end of a second oil supply pipe is connected with the hydraulic pump 10, the other end of the second oil supply pipe is connected with an oil supply outlet, a second one-way valve 13 and a second proportional valve 14 are connected in series on the second oil supply pipe, the second one-way valve 13 is arranged in the forward direction to realize reverse isolation, the oil is prevented from flowing back to the hydraulic pump 10, and the second proportional valve 14 realizes control according to a planned flow proportion; the liquid suction port of the hydraulic pump 10 is connected with the hydraulic oil tank 11 and is used for obtaining oil from the hydraulic oil tank 11, and the power input end of the hydraulic pump 10 is connected with the prime mover 9 and provides power for the hydraulic pump 10 through the prime mover 9; according to the embodiment, high-pressure oil is output simultaneously by adopting the liquid drive oil source and the gas drive oil source according to the index requirements of load and the motion time of the actuating mechanism, and the requirements of special vehicles on high-pressure large-flow output are met. The high-pressure gas cylinder 1 is communicated with the gas side of the gas-liquid actuator 3, when the gas-liquid combined high-flow oil source works, oil on the liquid side of the gas-liquid actuator 3 is quickly discharged under the driving of gas, when the liquid drive oil source and the gas drive oil source are combined to output flow externally, high-pressure high-flow output can be realized, the flow adopts a proportional control mode, when the gas-liquid combined high-flow oil source outputs flow externally, oil is firstly supplied by liquid drive, the flow of the liquid drive oil supply is gradually increased, then the gas drive oil supply is opened, and the stability of the action of an execution mechanism is ensured. During specific implementation, the liquid drive oil source and the gas drive oil source output high-pressure oil simultaneously according to a certain proportion during working, for example, the maximum output flow of the liquid drive oil source can account for 30% -70% of the total demand according to actual conditions, and the rest is output by the gas drive oil source.
In this embodiment, a new unique structure for filling oil to the gas drive oil source is provided: the gas drive oil source further comprises a second electromagnetic directional valve 5 and a third one-way valve 6 which are arranged in series, the third one-way valve 6 is arranged in a reverse direction and used for realizing reverse oil filling in the direction from the second electromagnetic directional valve 5 to an oil supply outlet, the second electromagnetic directional valve 5 and the third one-way valve 6 are connected in series to form a first passage, a first proportional valve 7 and a first one-way valve 8 are connected in series to form a second passage, and the first passage and the second passage are connected in parallel and then connected in series with the first electromagnetic directional valve 4. For realizing the constant-pressure overflow, the liquid drive oil source equipment of the embodiment further comprises an overflow valve 12, and the overflow valve 12 is arranged on the second oil supply pipe, and is used for realizing the overflow pressure-stabilizing control of the oil output by the hydraulic pump 10, and more specifically, the overflow valve 12 is arranged between the hydraulic pump 10 and the second check valve 13.
In addition, the hydraulic oil tank 11 in this embodiment is also communicated with an oil inlet pipe, and oil can be filled into the hydraulic oil tank 11 through the oil inlet pipe. As a further improvement, a manual ball valve 2 is arranged on an air supply pipe between a high-pressure gas cylinder 1 and an air side of an air-liquid actuator 3 in the embodiment, and a switch of the manual ball valve 2 is used for realizing whether air is supplied to the air side of the air-liquid actuator 3 or not so as to realize air driving force control and improve the safety of the invention; in order to detect the air supply pressure, a pressure sensor is also arranged on the air supply pipe between the high-pressure air bottle 1 and the air side of the air-liquid actuator 3; in the embodiment, the high-pressure nitrogen gas with a certain pressure is pre-filled in the high-pressure gas cylinder 1, after the gas-liquid actuator 3 is filled with oil, the pressure in the high-pressure gas cylinder 1 can exceed the maximum load pressure, and the volume of the high-pressure gas cylinder 1 is required to meet the requirement that the pressure in the gas cylinder is always higher than the load pressure in the working process of a gas-driven oil source; more specifically, the volume of the high-pressure gas cylinder 1 in this embodiment is 300L, the pressure of the pre-filled nitrogen gas in the high-pressure gas cylinder 1 is 16MPa, the volume of the gas-liquid actuator 3 should be greater than the requirement of the system for the amount of oil liquid output by the gas-drive oil source, and a margin of about 20% can be reserved, the volume of the gas-liquid actuator 3 in this embodiment is 160L, and the oil liquid output by the gas-drive oil source equipment is 125L.
The present invention may operate as follows: (1) gas and oil supply and displacement source oil filling: opening the manual ball valve 2, and electrifying and reversing the first electromagnetic reversing valve 4 and the second electromagnetic reversing valve 5 to allow oil to pass; starting the liquid drive oil source, adjusting the second proportional valve 14 to enable the liquid drive output flow to be about 30L/min-50L/min, gradually increasing the pressure of the overflow valve 12, and when the pressure reaches the initial pressure 16MPa in the high-pressure gas cylinder 1, enabling the oil to enter the gas-liquid actuator 3 through the third one-way valve 6, the second electromagnetic directional valve 5 and the first electromagnetic directional valve 4. Along with the continuation of the oil filling process, the oil continuously enters a gas-liquid actuator 3 (in the embodiment, a piston type energy accumulator), high-pressure gas in a high-pressure gas cylinder 1 is compressed at the same time, the gas pressure is gradually increased, oil filling is stopped when the pressure reaches a preset value of 25MPa, and the first electromagnetic reversing valve 4 and the second electromagnetic reversing valve 5 are closed; (2) gas-liquid combined oil supply: firstly, starting a liquid drive oil source, gradually adjusting a second proportional valve 14 to enable the liquid drive output flow to gradually increase to the maximum flow, starting timing from the adjustment of the second proportional valve 14 and opening a first electromagnetic directional valve 4 after about 1s, and gradually adjusting a first proportional valve 7 to enable the gas drive output flow to gradually increase to the maximum value to realize gas-liquid combined oil supply; (3) stopping oil supply: firstly, the first proportional valve 7 is gradually adjusted to gradually reduce the output flow of the gas drive oil source to zero, the first electromagnetic directional valve 4 is closed, then the second proportional valve 14 is adjusted to reduce the output flow of the liquid drive oil source to zero, and finally the liquid drive oil source is closed.
In the embodiment, the liquid drive oil source is adopted to supply oil to the liquid side of the gas-liquid actuator 3, the scheme provided by the invention is simple and feasible, and when the oil is filled for 150L actually, the time is about 3 minutes, the pressure of the high-pressure gas is increased by about 10MPa, and the temperature of the high-pressure gas is increased by about 20 ℃, so that the use requirement can be completely met. The first proportional valve and the second proportional valve are adopted to respectively control the oil supply flow of the liquid drive oil source and the gas drive oil source, and the mode of firstly supplying oil by liquid drive, gradually increasing the oil supply flow of the liquid drive and then opening the gas drive is adopted, so that the high-pressure large-flow output process is quick and stable. According to the embodiment, oil liquid pre-stored in the gas drive oil source is filled in through the liquid drive oil source, and according to the actual situation, the output flow rates of the gas drive oil source and the liquid drive oil source are in a certain proportion, so that the capacity of a prime motor for outputting power to the outside is not exceeded, and the total volume of the oil source is reduced as much as possible.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "the present embodiment," "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. A gas-liquid combined oil supply system is characterized in that: the system comprises gas drive oil source equipment and liquid drive oil source equipment, wherein the gas drive oil source equipment comprises a first oil supply pipe, the liquid drive oil source equipment comprises a second oil supply pipe, and the first oil supply pipe and the second oil supply pipe are arranged in parallel and are both connected with an oil supply outlet; one end of the first oil supply pipe is connected with the liquid side of the gas-liquid actuator (3), the other end of the first oil supply pipe is connected with an oil supply outlet, a first electromagnetic directional valve (4), a first proportional valve (7) and a first one-way valve (8) are connected to the first oil supply pipe in series, and the gas side of the gas-liquid actuator (3) is connected with the high-pressure gas cylinder (1); one end of the second oil supply pipe is connected with the hydraulic pump (10), the other end of the second oil supply pipe is connected with an oil supply outlet, a second one-way valve (13) and a second proportional valve (14) are connected to the second oil supply pipe in series, a liquid suction port of the hydraulic pump (10) is connected with the hydraulic oil tank (11), and a power input end of the hydraulic pump (10) is connected with the prime motor (9); the gas drive oil source further comprises a second electromagnetic directional valve (5) and a third one-way valve (6), the second electromagnetic directional valve (5) and the third one-way valve (6) are connected in series to form a first passage, the first proportional valve (7) and the first one-way valve (8) are connected in series to form a second passage, and the first passage and the second passage are connected in parallel and then connected in series with the first electromagnetic directional valve (4).
2. The gas-liquid combined oil supply system according to claim 1, wherein: and in the direction from the second electromagnetic directional valve (5) to the oil supply outlet, the third one-way valve (6) is a one-way valve arranged in the reverse direction.
3. The gas-liquid combined oil supply system according to claim 2, wherein: the first electromagnetic directional valve (4) is of a power-off normally-off type.
4. The gas-liquid combined oil supply system according to claim 3, wherein: the second electromagnetic directional valve (5) is of a power-off normally-closed type.
5. The gas-liquid combined oil supply system according to claim 4, wherein: the liquid drive oil source equipment further comprises an overflow valve (12), and the overflow valve (12) is arranged on the second oil supply pipe.
6. The gas-liquid combined oil supply system according to claim 5, wherein: the overflow valve (12) is arranged between the hydraulic pump (10) and the second check valve (13).
7. The gas-liquid combined oil supply system according to claim 6, wherein: and a manual ball valve (2) is arranged on the gas supply pipe between the high-pressure gas cylinder (1) and the gas side of the gas-liquid actuator (3).
8. The gas-liquid combined oil supply system according to claim 7, wherein: and a pressure sensor is also arranged on the air supply pipe between the high-pressure air bottle (1) and the air side of the air-liquid actuator (3).
9. The gas-liquid combined oil supply system according to claim 1 or 8, wherein: the high-pressure gas cylinder (1) is filled with nitrogen.
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| CN106286428A (en) * | 2016-11-01 | 2017-01-04 | 中国石油大学(华东) | A kind of semi-active type heave compensator hydraulic control system |
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| CN102464096B (en) * | 2010-11-07 | 2014-05-07 | 中国石化集团胜利石油管理局井下作业公司 | Large anticollision protection safety device for offshore wellhead platform |
| CN102322452A (en) * | 2011-09-13 | 2012-01-18 | 何学才 | Hydraulic balanced energy-saving device for stepped heating furnace |
| CN102704960B (en) * | 2012-06-14 | 2014-12-03 | 湖南星奥信息技术有限公司 | Mineral efficient energy-saving emulsification liquid feeding unit |
| CN202832962U (en) * | 2012-08-23 | 2013-03-27 | 上海汇益控制系统股份有限公司 | Wind power generation double hydraulic control pitch system |
| CN104514759A (en) * | 2014-12-30 | 2015-04-15 | 天津福云天翼科技有限公司 | High-flow separating accumulator group constant pressure regulating system |
| BR102015001623A2 (en) * | 2015-01-23 | 2015-06-30 | Neogas Do Brasil Gás Natural Comprimido S A | High pressure gas supply system and equipment using special hydraulic oil on a tractor truck using vertical or horizontal cylinders |
| CN205001263U (en) * | 2015-08-19 | 2016-01-27 | 广东伊之密精密机械股份有限公司 | Energy -conserving pump station of infinitely variable control variable |
| CN205806042U (en) * | 2016-07-12 | 2016-12-14 | 天津瀚福精密液压技术有限公司 | A kind of tyre vulcanizer pressurized hydraulic servo-control system |
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