CN113513862A - Series throttle valve - Google Patents
Series throttle valve Download PDFInfo
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- CN113513862A CN113513862A CN202110355636.8A CN202110355636A CN113513862A CN 113513862 A CN113513862 A CN 113513862A CN 202110355636 A CN202110355636 A CN 202110355636A CN 113513862 A CN113513862 A CN 113513862A
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Abstract
The invention belongs to the technical field of fluid control, and relates to a series throttle valve, which comprises a valve body, wherein the valve body comprises a fluid inlet and a fluid outlet; the valve body comprises a valve core; the valve core comprises at least one series unit; the series unit is formed by connecting a fluid hole inlet valve core and a fluid side inlet valve core in series. The series throttling valve provided by the invention can reduce/eliminate the cavitation phenomenon of fluid in high-pressure throttling and fluid control.
Description
Technical Field
The invention belongs to the technical field of fluid control, and relates to a series throttle valve.
Background
The micro throttle valve is widely applied in various industries, in particular to the fields of hydraulic systems, flow regulation and throttling refrigeration (refrigerants and cryogenic fluids). The performance of the micro-throttle valve, which is a key component of the system, determines the efficiency of the whole system. The method plays an important role in flow control regulation of the system and the cold source of the throttling refrigeration system. In the field of throttling of low-temperature fluid, the micro throttling valve is widely applied. In recent years, with the development of aerospace science and technology in China, particularly the engineering in the field of deep space exploration, the low-temperature propellant cannot only meet the requirement of short-time use of a carrier rocket, but also must meet the requirement of long-time on-orbit tasks in the future. The low-temperature propellant adopts low-temperature fluid with relatively low boiling point, is easy to evaporate, and has more serious evaporation condition in space environment. The thermodynamic exhaust system is a method for effectively reducing the evaporation condition of a propellant, and a J-T throttle valve is a key component for generating low-temperature cold, and the performance of the J-T throttle valve determines the efficiency of recovering the exhaust cold of the system and the exhaust loss.
For high-pressure throttling, in order to realize micro flow control, the throttling size required by a conventional small hole or slit throttling mode is small, the throttling mechanism is tiny and weak, and under the condition of easily generating cavitation, the throttling mechanism is easily subjected to cavitation corrosion, the original throttling performance cannot be maintained, and even the throttling valve is damaged.
For low-temperature liquid throttling, the cavitation/flash evaporation problem is serious due to the physical properties of low boiling point, small latent heat and the like, irreversible loss is increased, effective cold loss is caused, the flow characteristic of the throttling valve is influenced, noise and structural cavitation are caused, and the performance and the service life of the throttling valve are influenced. The conventional throttling valve generates a throttling effect by suddenly reducing the flow cross section area and accelerating and expanding fluid, but the throttling process is rapid and violent, so that violent cavitation is easily caused, and the throttling valve is not suitable for low-temperature working media with strict limitation on cavitation.
For the foregoing reasons, it is critical to address high pressure throttling and fluid control to develop a microchannel throttle valve that reduces/eliminates cavitation.
Disclosure of Invention
The invention provides a series throttling valve which is used for reducing/eliminating cavitation of fluid in high-pressure throttling and fluid control.
The technical scheme for solving the problems is as follows: a tandem throttle valve characterized by comprising:
comprises a valve body, wherein the valve body comprises a fluid inlet and a fluid outlet;
the valve body comprises a valve core; the valve core comprises at least one series unit;
the series unit is formed by connecting a fluid hole inlet valve core and a fluid side inlet valve core in series.
Further, the fluid hole inlet valve core comprises a first core body, wherein the first core body is in a sheet shape, a through hole penetrates through the first core body, and the through hole is a valve core inlet; the front surface of the first core body is provided with a first flow channel and a transition area, and the two ends of the flow channel are respectively provided with a first flow channel inlet and a first flow channel outlet; the inlet of the first flow passage is connected with the inlet of the valve core, and the outlet of the first flow passage is connected with the transition area.
Further, the first flow passage is a tapered flow passage.
Further, the first flow channel is a straight flow channel or a bent flow channel.
Further, the bent flow passage may be formed by one or more arc lines.
Further, the fluid side spool includes a second core;
the second core body is in a sheet shape, and a supporting structure is arranged at the edge of the second core body;
the front surface of the second core body is provided with a side-inlet valve core outlet and a second flow channel, and the side-inlet valve core outlet is a blind hole; and the two ends of the second flow channel are respectively provided with a second flow channel inlet and a second flow channel outlet, and the second flow channel outlet is connected with the outlet of the side-inlet valve core.
Further, the second flow passage is a tapered flow passage.
Further, the second flow channel is a straight flow channel or a bent flow channel.
Further, the bent flow passage may be formed by one or more arc lines.
Further, the number of the supporting structures is at least two.
Further, in the above-mentioned serial unit, the front surface of the fluid hole inlet valve element is attached to the back surface of the fluid side inlet valve element.
Further, the fluid port inlet valve of the series unit is adjacent to the core fluid inlet.
Furthermore, the fluid inlet and the fluid outlet are in a runner shape with gradually changed diameters, so that severe cavitation caused by sudden change of the cross section area of the runner is avoided.
Further, the valve core is installed in the valve body in an interference fit mode or a packing adhesion mode.
The invention has the advantages that:
the micro throttle valve is a key component in a thermodynamic exhaust system, and the performance of the micro throttle valve determines the efficiency of recovering the exhaust cold energy of the system and the exhaust loss. For low-temperature liquid throttling, the cavitation/flash evaporation problem is serious due to the physical properties of low boiling point, small latent heat and the like, irreversible loss is increased, effective cold loss is caused, the flow characteristic of the throttling valve is influenced, noise and structural cavitation are caused, and the performance and the service life of the throttling valve are influenced. The common throttle valve is difficult to ensure high-efficiency refrigeration and reduce the cavitation degree. The series throttling valve provided by the invention can reduce/eliminate the cavitation phenomenon of fluid in high-pressure throttling and fluid control.
Drawings
FIG. 1 is a schematic diagram of a series throttle according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the tandem throttle valve of FIG. 1;
FIG. 3 is a schematic diagram of a fluid port inlet spool in the tandem throttle valve of FIG. 1;
FIG. 4 is a schematic diagram of a fluid side spool in the tandem throttle valve of FIG. 1;
fig. 5 is an enlarged view of a portion a in fig. 2.
Wherein: 201. a fluid inlet; 202. a fluid outlet; 203. a valve body; 204. a fluid port inlet spool; 205. a fluid side inlet spool; 301. a first flow channel outlet; 302. a first flow passage; 303. a first flow channel inlet; 304. a spool inlet; 401. a second flow channel inlet; 402. a second flow passage; 403. a second flow channel outlet; 404. a side inlet spool outlet; 405. a support structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
The performance of the micro-throttle valve, which is a key component of the system, determines the efficiency of the whole system. The method plays an important role in flow control regulation of the system and the cold source of the throttling refrigeration system. In the field of throttling of low-temperature fluid, the micro throttling valve is widely applied. With the development of aerospace science and technology in China, particularly the engineering in the field of deep space exploration, the low-temperature propellant cannot meet the requirement of short-time use of a carrier rocket, and needs to meet the requirement of long-time on-orbit tasks in the future. The low-temperature propellant adopts low-temperature fluid with relatively low boiling point, is easy to evaporate, and has more serious evaporation condition in space environment. The technology for storing low-temperature liquid on the ground surface is well developed, but in the space environment, the conditions of the low-temperature propellant are worse, such as space radiation, microgravity environment, insufficient storage space and the like. These harsh conditions place even greater demands on the space storage of the cryogenic propellant. The continuous evaporation of the propellant can increase the pressure in the storage tank, the increase of the pressure can cause great adverse effect on the safe operation of the spacecraft, and the control of the pressure in the low-temperature storage tank is the key for solving the problem of the storage of the propellant in a space orbit. The thermodynamic exhaust system is a technology for realizing on-rail long-term storage of the low-temperature propellant, namely on-rail storage of the low-temperature propellant.
The J-T throttle valve is a key component for generating low-temperature cold in a thermodynamic exhaust system. The performance of the system determines the efficiency of the system exhaust cold recovery and the exhaust loss. For low-temperature liquid throttling, the cavitation/flash evaporation problem is serious due to the physical properties of low boiling point, small latent heat and the like, irreversible loss is increased, effective cold loss is caused, the flow characteristic of the throttling valve is influenced, noise and structural cavitation are caused, and the performance and the service life of the throttling valve are influenced. The conventional throttling valve generates a throttling effect by suddenly reducing the flow cross section area and accelerating and expanding fluid, but the throttling process is rapid and violent, so that violent cavitation is easily caused, and the throttling valve is not suitable for low-temperature working media with strict limitation on cavitation.
The embodiment of the invention provides a series throttle valve which can well solve the problems. As shown in fig. 2, the tandem throttle valve comprises a valve body 203, and the valve body (203) comprises a fluid inlet (201) and a fluid outlet (202). The valve body (203) comprises a valve core; the valve core comprises at least one series unit; the series unit is formed by connecting a fluid hole inlet valve core (204) and a fluid side inlet valve core (205) in series. The assembled structure is schematically shown in fig. 1.
As a preferred embodiment of the present invention, the fluid inlet 201 and the fluid outlet 202 both adopt a flow channel shape with gradually changing diameters, so as to avoid severe cavitation caused by abrupt change of the cross-sectional area of the flow channel.
Referring to fig. 2 and 5, in the tandem throttle valve, the spool is composed of a fluid hole inlet spool 204 and a fluid side inlet spool 205 which are alternately arranged, and the first spool at the inlet is the fluid hole inlet spool 204. The fluid flows in along the arc-shaped nozzle structure, enters the first fluid hole inlet valve core 204 tangentially, flows out of the fluid hole inlet valve core 204, and then enters the next-stage fluid side inlet valve core 205 tangentially. The series throttle comprises at least one set of series units of alternating fluid port inlet spools 204 and fluid side inlet spools 205.
In this embodiment, the series throttle is preferably 13 sets of series units.
As shown in fig. 3, the fluid orifice inlet spool 204 includes a first core that is sheet-like. The first core 304 is provided with a spool inlet port, a first channel inlet port 303, a first channel 302, and a first channel outlet port 301. The front face of fluid port inlet spool 204 of fig. 3 is mated to the back face of fluid side inlet spool 205 of fig. 4, forming the flow path of the port inlet spool. Fluid flows in from the circular hole in the center 304 of the valve body, enters the bent flow channel from the first flow channel inlet 303, passes through the first flow channel 302, flows out of the bent flow channel from the first flow channel outlet 301, enters the transition region and enters the next-stage fluid side valve core 205 (see fig. 4). The fluid completes multi-stage throttling in the bent flow passage, pressure drop is generated by using the resistance of the working medium in the flow process in the flow passage, and a throttling effect is formed.
The fluid port inlet spool 204 shown in fig. 3 includes at least one tortuous flow path, and the tortuous micro-channels may be, but are not limited to, arcuate tapering, and may be straight tapering channels. The partially/fully tortuous fluid passageway may be formed by one or more arcs. In this embodiment, preferably, the orifice inlet valve core of the serial throttle valve includes 4 bent flow passages, each bent flow passage is radially arranged, the 4 bent flow passages are circumferentially and evenly distributed, and each bent flow passage is in an arc-shaped tapered shape. The whole thickness of the hole inlet valve core is 0.4mm, and the depth of the bent flow channel is 0.2 mm.
As shown in fig. 4, fluid side spool 205 comprises a second core; the second core is sheet-shaped. The fluid side spool 205 is provided with a second flow channel inlet 401, a second flow channel 402, a second flow channel outlet 403, a side spool outlet 404, and a support structure 405. The front side of fig. 4 and the fluid port of fig. 3 form the flow path of the side-entry spool into the back side of the core. Fluid flows into the side-inlet valve core from the outlet transition area of the hole inlet valve core of the upper stage, enters the bent flow channel from the second flow channel inlet 401, passes through the second flow channel 402, is collected from the second flow channel outlet 403 to the side-inlet valve core outlet 404, and flows out to the 304 valve core inlet of the hole inlet valve core of the lower stage (as shown in fig. 3). Similar to the fluid hole inlet valve core, the fluid is subjected to multi-stage throttling in the bent channel, pressure drop is generated by using the resistance of the working medium in the flow process in the channel, a throttling effect is formed, and the cavitation degree of the fluid is reduced.
The fluid side spool shown in fig. 4 contains at least one tortuous flow path, and the tortuous microchannel may be, but is not limited to, an arcuate taper or may be a straight tapered channel. The partially/fully tortuous fluid passageway may be formed by one or more arcs. The fluid side spool 205 includes at least two support structures 405 that form a flow area that connects the exit transition area of the junction spool with the primary orifice and the flow path entrance of the present side spool. In this embodiment, preferably, the side valve core of the serial throttle valve includes 4 bending flow channels, each bending flow channel is radially arranged, the 4 bending flow channels are circumferentially and evenly distributed, and each bending flow channel is in an arc-shaped tapered shape. The whole thickness of the side inlet valve core is 0.4mm, and the depth of the bent flow channel is 0.2 mm.
A fluid port inlet spool, as in fig. 3, and a fluid side inlet spool, as in fig. 4, comprise a set of spool units. The bent flow channel of the fluid inlet valve core of the fluid hole in one valve core unit and the bent channel of the fluid side valve core can (but is not limited to) keep the same relative position, and the bent flow channels of different valve core units can (but is not limited to) keep the same relative position.
Further, as can be seen from fig. 3 and 4, the flow passage structures, the number of flow passages, the bent forms, and the bent structures in the fluid port inlet spool and the fluid side spool in the present embodiment are consistent, but it is understood that these structures, the number, and the forms may not be consistent.
The hole inlet valve core in the figure 3 and the side inlet valve core in the figure 4 are alternately assembled in the valve body 203 in an interference fit or packing adhesion mode, so that no gap is formed between the side edge of the valve core and the inner wall of the valve body 203, and fluid is prevented from flowing through the gap.
In some embodiments of the present invention, the size of the core bending channel is in micron level, the working pressure is also in the range of 0.1MPa-5MPa, and the working temperature range is in the low temperature range of 20K-300K. In some embodiments of the invention, the valve body and the valve core can be made of metal materials with high pressure bearing capacity and thermal conductivity, such as stainless steel.
In some embodiments of the present invention, the meandering channel may be formed in a material-removing manner on the core of fig. 3 as well as on the core of fig. 4. When the bent flow channel is formed, the motherboard cannot be punched through. In this example, the depth of the flow channels is half the thickness of the entire core, but it is understood that this depth ratio is not limited to 0.5.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, or applied directly or indirectly to other related systems, are included in the scope of the present invention.
Claims (10)
1. A tandem throttle valve, characterized by:
comprising a valve body (203), the valve body (203) comprising a fluid inlet (201) and a fluid outlet (202);
the valve body (203) comprises a valve core; the valve core comprises at least one series unit;
the series unit is formed by connecting a fluid hole inlet valve core (204) and a fluid side inlet valve core (205) in series.
2. A series throttle valve according to claim 1, characterized in that:
the fluid orifice inlet spool (204) includes a first core that is sheet-shaped;
a through hole penetrates through the first core body, and the through hole is a valve core inlet (304);
a first flow channel (302) and a transition area are arranged on the front surface of the first core body, and a first flow channel inlet (303) and a first flow channel outlet (301) are respectively arranged at two ends of the flow channel; the first flow channel inlet (303) is connected to the spool inlet (304) and the first flow channel outlet (301) is connected to the transition zone.
3. A series throttle valve according to claim 2, characterized in that:
the first flow channel (302) is a tapered flow channel.
4. A series throttle valve according to claim 3, characterized in that:
the first flow channel (302) is a straight flow channel or a bent flow channel; the bent flow passage is formed by one or more sections of arc lines.
5. A series connection throttling valve according to any one of claims 1 to 4, characterized in that:
the fluid side spool (205) comprises a second core;
the second core body is in a sheet shape, and a supporting structure is arranged at the edge of the second core body;
a side-inlet valve core outlet (404) and a second flow passage (402) are arranged on the front surface of the second core body, and the side-inlet valve core outlet (404) is a blind hole; the two ends of the second flow channel (402) are respectively a second flow channel inlet (401) and a second flow channel outlet (403), and the second flow channel outlet (403) is connected with the side-inlet valve core outlet (404).
6. A series flow throttling valve according to claim 5, wherein:
the second flow channel (402) is a tapered flow channel.
7. A series flow throttling valve according to claim 6, wherein:
the second flow channel (402) is a straight flow channel or a bent flow channel; the bent flow passage may be formed by one or more arc lines.
8. A series flow throttling valve according to claim 7, wherein:
in the series unit, the front face of the fluid port inlet spool (204) is attached to the back face of the fluid side inlet spool (205).
9. A series flow throttling valve according to claim 8 wherein:
in the first series unit near the core fluid inlet (201), its fluid orifice inlet valve is near the core fluid inlet (201).
10. A series flow throttling valve according to claim 9 wherein:
the fluid inlet (201) and the fluid outlet (202) adopt a flow passage shape with gradually changed diameters; the valve core is arranged in the valve body (203) in an interference fit mode or a packing adhesion mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110355636.8A CN113513862B (en) | 2021-04-01 | 2021-04-01 | Series throttle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110355636.8A CN113513862B (en) | 2021-04-01 | 2021-04-01 | Series throttle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113513862A true CN113513862A (en) | 2021-10-19 |
| CN113513862B CN113513862B (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110355636.8A Active CN113513862B (en) | 2021-04-01 | 2021-04-01 | Series throttle valve |
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| CN (1) | CN113513862B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05157406A (en) * | 1991-12-04 | 1993-06-22 | T G K:Kk | Expansion valve |
| EP0559564A1 (en) * | 1992-03-03 | 1993-09-08 | Alain Verdelet | Progressive expansion valve |
| CN202125643U (en) * | 2011-06-29 | 2012-01-25 | 西安秦申特种调节阀有限责任公司 | High pressure difference super-small flow regulating valve |
| CN102954226A (en) * | 2011-08-18 | 2013-03-06 | 孙杰 | Pressure-reducing throttling valve |
| US20140374631A1 (en) * | 2013-06-19 | 2014-12-25 | California Institute Of Technology | Flow cage assemblies |
| CN204533793U (en) * | 2015-02-25 | 2015-08-05 | 福建南安市九尊王洁具有限公司 | Septum valve |
| CN209309344U (en) * | 2018-11-28 | 2019-08-27 | 浙江中控流体技术有限公司 | A kind of tube-in-tube structure of sleeve control valve |
| US20200182520A1 (en) * | 2016-07-13 | 2020-06-11 | Stone Mountain Technologies, Inc. | Electronic expansion valves having multiple orifice plates |
| CN112254383A (en) * | 2020-11-05 | 2021-01-22 | 上海空间推进研究所 | Throttle valve core assembly and throttle valve thereof |
-
2021
- 2021-04-01 CN CN202110355636.8A patent/CN113513862B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05157406A (en) * | 1991-12-04 | 1993-06-22 | T G K:Kk | Expansion valve |
| EP0559564A1 (en) * | 1992-03-03 | 1993-09-08 | Alain Verdelet | Progressive expansion valve |
| CN202125643U (en) * | 2011-06-29 | 2012-01-25 | 西安秦申特种调节阀有限责任公司 | High pressure difference super-small flow regulating valve |
| CN102954226A (en) * | 2011-08-18 | 2013-03-06 | 孙杰 | Pressure-reducing throttling valve |
| US20140374631A1 (en) * | 2013-06-19 | 2014-12-25 | California Institute Of Technology | Flow cage assemblies |
| CN204533793U (en) * | 2015-02-25 | 2015-08-05 | 福建南安市九尊王洁具有限公司 | Septum valve |
| US20200182520A1 (en) * | 2016-07-13 | 2020-06-11 | Stone Mountain Technologies, Inc. | Electronic expansion valves having multiple orifice plates |
| CN209309344U (en) * | 2018-11-28 | 2019-08-27 | 浙江中控流体技术有限公司 | A kind of tube-in-tube structure of sleeve control valve |
| CN112254383A (en) * | 2020-11-05 | 2021-01-22 | 上海空间推进研究所 | Throttle valve core assembly and throttle valve thereof |
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| Publication number | Publication date |
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| CN113513862B (en) | 2022-10-21 |
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