CN104500270A - Electric rotary sliding-plate valve-type rocket ramjet engine gas flow-rate adjusting device - Google Patents
Electric rotary sliding-plate valve-type rocket ramjet engine gas flow-rate adjusting device Download PDFInfo
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- CN104500270A CN104500270A CN201410753404.8A CN201410753404A CN104500270A CN 104500270 A CN104500270 A CN 104500270A CN 201410753404 A CN201410753404 A CN 201410753404A CN 104500270 A CN104500270 A CN 104500270A
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Abstract
The invention discloses an electric rotary sliding-plate valve-type rocket ramjet engine gas flow-rate adjusting device. Both a valve body upper box body and a valve body lower box body are respectively of a barrel structure, the two barrel structures define a cylindrical box body, a spray pipe hole is respectively formed in corresponding positions of the end surfaces of the two cylinder structures, a drive motor is fixedly arranged on the axis of the end surface of the valve body upper box body, a shaft of the drive motor is coaxially fixedly connected with a sliding-plate connecting rod through a coupler, the sliding-plate connecting rod penetrates through a sliding-plate connecting rod hole formed in the axis of the end surface of the valve body lower box body to be fixedly connected with a sliding plate, a rotary plane of the upper end surface of the sliding plate is fit to the outer end surface of the valve body lower box body, a hole is formed in the position, corresponding the spray pipe hole, of the sliding plate, a spray pipe is fixed in the spray pipe holes of the valve body upper box body and the valve body lower box body, a gas generator is arranged on the outer end surface of the valve body upper box body, the position of the gas generator corresponds to the position of the spray pipe, and a pressure sensor is arranged on an end enclosure of the gas generator. The electric rotary sliding-plate valve-type rocket ramjet engine gas flow-ate adjusting device is simple in structure, precise to control, reliable to work and relatively low in cost.
Description
Technical field
The invention belongs to solid rocket ramjet gas flow regulation technology field, particularly a kind of electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device.
Background technique
Solid rocket ramjet has the advantage of pressed engine and rocket motor concurrently, has than the advantage such as leaping high, volume is little, lightweight, compact structure, reliable operation, cost are lower.For ensureing that motor has best service behaviour and good thrust regulating power, solid rocket ramjet should carry out gas flow adjustment.The scheme regulated about gas flow at present mainly contains firm discharge formula, formula of being jammed, non-formula and the whirlpool valve type four kinds of being jammed.The configuration that flow control valve adopts usually has slide-valve plunger, rotating cam valve, rotation sliding plate valve, cone valve etc. multiple.The driving mechanism that traditional control system adopts generally has hydraulic transmission, Mechanical & Electrical Transmission, Pneumatic Transmission.According to working environment and work characteristics, motor-driven and Pneumatic Transmission are better than hydraulic transmission.
Formula of being jammed at present solid rocket ramjet gas flow controlling device generally adopts electric sliding moushroom valve or pneumatic type pin valve device.A kind of gas-flow regulator for solid rocket ramjet (patent No. 200810075649.4) of Bao Wen, Niu Wenyu etc. proposes a kind of gas flow regulating system of solid rocket ramjet of pneumatic needle valve type gas consumption adjusting valve, it mainly relies on valve head chamber pressure, drives valve head motion to carry out adjustment of combustion gas flow.Although structure is simple, fast response time, need increase air machinery, take up an area space comparatively greatly, because leaking easily appears in gas, in the process of adjustment of combustion gas flow, and be not easy to reach accurate control.Northwestern Polytechnical University Wang Yi woods proposes a kind of jet pipe becomes 90 degree non-coaxial needle valve type gas flow regulating system with firing chamber, easily realizes with thermal protection although larynx tightening latch easily seals, and experimental system volume is large, can not reach accurate control.
Summary of the invention
The object of the present invention is to provide a kind of structure simple, control accurately, reliable operation, lower-cost electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device.
The technical solution realizing the object of the invention is:
A kind of electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device, comprises gas generator, pressure transducer, valve body upper box, drive motor, coupling, jet pipe, sliding plate connecting rod, valve body lower box, set screw nut, thrust bearing and sliding plate, valve body upper box and valve body lower box are cylindrical structure, the opening of two cylindrical structures relatively also fixedly surrounds cylindrical box structure, the end face of two cylindrical structures has jet pipe hole in the position of correspondence, in the cavity that two cylindrical structures surround, drive motor is fixedly installed on the axle center place of the end face of valve body upper box, axle and the sliding plate connecting rod of drive motor are coaxially connected by coupling, the sliding plate tie rod holes that the end face axle center place that sliding plate connecting rod passes valve body lower box has and sliding plate are connected, fit in the rotational plane of the upper-end surface of sliding plate and the exterior edge face of valve body lower box, sliding plate has the hole corresponding with jet pipe hole site, the cavity that jet pipe surrounds through two cylindrical structures, and be fixed in the jet pipe hole of valve body upper box and valve body lower box, gas generator is arranged on the exterior edge face of valve body upper box, its position is corresponding with the position of jet pipe, gas generator end socket place is provided with pressure transducer.
The present invention compared with prior art, its remarkable advantage:
(1) the present invention compares plug type and needle-like flow control valve needs simultaneously by rotating the characteristic carrying out with straight line motion regulating, by means of only the motion of single small angle rotation can realize gas generator gas flow accurate, regulate at random.
(2) structure of the present invention is simple, compact, and volume is little, and quality is light, compares plug type and needle-like flow control valve can omit valve head structural design, and its regulative mode more easily realizes.
(3) the upper and lower box house of valve body of the present invention forms cavity, and jet pipe upper end adopts seal ring to seal, and ensure that the reliability of system working seal under high temperature, high pressure and high-speed gas flowing environment.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device of the present invention.
The plan view of Fig. 2 electronic rotation sliding plate of the present invention valve type solid rocket ramjet gas flow controlling device sliding plate.
Embodiment
Composition graphs 1 and Fig. 2:
A kind of electronic rotation sliding plate of the present invention valve type solid rocket ramjet gas flow controlling device, comprises gas generator 1, pressure transducer 2, valve body upper box 4, drive motor 5, coupling 6, jet pipe 7, sliding plate connecting rod 8, valve body lower box 9, set screw nut 10, thrust bearing 11 and sliding plate 12, valve body upper box 4 and valve body lower box 9 are cylindrical structure, the opening of two cylindrical structures relatively also fixedly surrounds cylindrical box structure, the end face of two cylindrical structures has jet pipe hole in the position of correspondence, in the cavity that two cylindrical structures surround, drive motor 5 is fixedly installed on the axle center place of the end face of valve body upper box 4, axle and the sliding plate connecting rod 8 of drive motor 5 are coaxially connected by coupling 6, the sliding plate tie rod holes that the end face axle center place that sliding plate connecting rod 8 passes valve body lower box 9 has and sliding plate 12 are connected, fit in the rotational plane of the upper-end surface of sliding plate 12 and the exterior edge face of valve body lower box 9, sliding plate 12 has the hole corresponding with jet pipe hole site, the cavity that jet pipe 7 surrounds through two cylindrical structures, and be fixed in the jet pipe hole of valve body upper box 4 and valve body lower box 9, gas generator 1 is arranged on the exterior edge face of valve body upper box 4, its position is corresponding with the position of jet pipe 7, gas generator 1 end socket place is provided with pressure transducer 2.
Sliding plate connecting rod 8 by the screw-internal thread fit of outside thread and set screw nut 10, by set screw nut 10 is fixedly installed thrust bearing 11 between the interior edge face of set screw nut 10 and valve body lower box 9 near one end of valve body lower box 9.
The jet pipe hole that valve body lower box 9 end face has is made up of two-part, part near jet pipe 7 is circular port, and be provided with internal thread and match with the outside thread of jet pipe 7 lower end, the part near sliding plate 12 is cone shape hole, jointly forms exhaust gas nozzle with the taper spray orifice that sliding plate 12 has.
One end circumference that jet pipe 7 is arranged in valve body upper box 4 jet pipe hole arranges circular groove, is provided with seal ring 3 in circular groove.
Embodiment:
Composition graphs 1 and Fig. 2:
A kind of electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device, comprises gas generator 1, pressure transducer 2, valve body upper box 4, drive motor 5, coupling 6, jet pipe 7, sliding plate connecting rod 8, valve body lower box 9, set screw nut 10, thrust bearing 11 and sliding plate 12, valve body upper box 4 and valve body lower box 9 are cylindrical structure, the opening of two cylindrical structures relatively also fixedly surrounds cylindrical box structure, the end face of two cylindrical structures has jet pipe hole in the position of correspondence, in the cavity that two cylindrical structures surround, drive motor 5 is fixedly installed on the axle center place of the end face of valve body upper box 4, axle and the sliding plate connecting rod 8 of drive motor 5 are coaxially connected by coupling 6, the sliding plate tie rod holes that the end face axle center place that sliding plate connecting rod 8 passes valve body lower box 9 has and sliding plate 12 are connected, sliding plate connecting rod 8 near one end of valve body lower box 9 by the screw-internal thread fit of outside thread and set screw nut 10, thrust bearing 11 is fixedly installed by set screw nut 10 between the interior edge face of set screw nut 10 and valve body lower box 9, thrust bearing 11 is tightened on the interior edge face of valve body lower box 9 by set screw nut 10, can prevent sliding plate 12 from producing play in the course of the work, the rotational plane of the upper-end surface of sliding plate 12 and the exterior edge face of valve body lower box 9 is made to keep fitting, sliding plate 12 has the hole corresponding with jet pipe hole site, the cavity that jet pipe 7 surrounds through two cylindrical structures, and be fixed in the jet pipe hole of valve body upper box 4 and valve body lower box 9, the jet pipe hole that valve body lower box 9 end face has is made up of two-part, part near jet pipe 7 is circular port, and be provided with internal thread and match with the outside thread of jet pipe 7 lower end, part near sliding plate 12 is cone shape hole, jointly exhaust gas nozzle is formed with the taper spray orifice that sliding plate 12 has, one end circumference that jet pipe 7 is arranged in valve body upper box 4 jet pipe hole arranges circular groove, seal ring 3 is provided with in circular groove, gas generator 1 is arranged on the exterior edge face of valve body upper box 4, its position is corresponding with the position of jet pipe 7, gas generator 1 end socket place is provided with pressure transducer 2.
During work, motor 5 accepts control command and rotates, and drives the coupling 6 and sliding plate connecting rod 8 partial turn that are connected with motor shaft, thus sliding plate 12 is rotated to an angle.During original state, the hole on the spray orifice on sliding plate 12 and valve body lower box 9 is in coincidence status, i.e. the central axes in both holes.After sliding plate 12 is rotated by sliding plate connecting rod 8 drive, spray orifice on sliding plate 12 will no longer overlap with the hole on valve body lower box 9, part throat area will be capped, thus throat's useful area is changed, and then change gas generator 1 pressure and propellant burning rate, reach the effect controlling gas flow.When angle of swing changes according to certain rules, throat opening area also presents certain Changing Pattern simultaneously, thus reaches the random object regulating combustion chamber pressure and gas flow.Pressure transducer 2 provides feedback signal for realizing Flow-rate adjustment closed loop control.When needs increase gas flow, control by motor 5 direction that sliding plate 12 reduces to throat opening area and rotate, now can accurately calculate throat opening area by displacement amount.When nozzle throat useful area reduces, gas generator 1 internal pressure increases, and propellant burning rate increases, thus gas flow is also increased.There is provided gas flow feedback quantity to control motor 5 according to the pressure signal of pressure transducer 2 and the throat opening area of calculating gained to rotate, vice versa.
Claims (5)
1. an electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device, is characterized in that: comprise gas generator (1), pressure transducer (2), valve body upper box (4), drive motor (5), coupling (6), jet pipe (7), sliding plate connecting rod (8), valve body lower box (9), set screw nut (10), thrust bearing (11) and sliding plate (12), valve body upper box (4) and valve body lower box (9) are cylindrical structure, the opening of two cylindrical structures relatively also fixedly surrounds cylindrical box structure, the end face of two cylindrical structures has jet pipe hole in the position of correspondence, in the cavity that two cylindrical structures surround, drive motor (5) is fixedly installed on the axle center place of the end face of valve body upper box (4), axle and the sliding plate connecting rod (8) of drive motor (5) are coaxially connected by coupling (6), the sliding plate tie rod holes that sliding plate connecting rod (8) has through the end face axle center place of valve body lower box (9) and sliding plate (12) are connected, fit in the rotational plane of the upper-end surface of sliding plate (12) and the exterior edge face of valve body lower box (9), (12) have the hole corresponding with jet pipe hole site to sliding plate, the cavity that jet pipe (7) surrounds through two cylindrical structures, and be fixed in the jet pipe hole of valve body upper box (4) and valve body lower box (9), gas generator (1) is arranged on the exterior edge face of valve body upper box (4), its position is corresponding with the position of jet pipe (7), gas generator (1) end socket place is provided with pressure transducer (2).
2. electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device according to claim 1, it is characterized in that: the screw-internal thread fit of described sliding plate connecting rod (8) near one end of valve body lower box (9) by outside thread and set screw nut (10), pass through set screw nut (10) between the interior edge face of set screw nut (10) and valve body lower box (9) and be fixedly installed thrust bearing (11).
3. electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device according to claim 1 and 2, it is characterized in that: the jet pipe hole that described valve body lower box (9) end face has is made up of two-part, part near jet pipe (7) is circular port, and be provided with internal thread and match with the outside thread of jet pipe (7) lower end, part near sliding plate (12) is cone shape hole, jointly forms exhaust gas nozzle with the taper spray orifice that sliding plate (12) has.
4. electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device according to claim 1 and 2, it is characterized in that: one end circumference that described jet pipe (7) is arranged in valve body upper box (4) jet pipe hole arranges circular groove, is provided with seal ring (3) in circular groove.
5. electronic rotation sliding plate valve type solid rocket ramjet gas flow controlling device according to claim 3, it is characterized in that: one end circumference that described jet pipe (7) is arranged in valve body upper box (4) jet pipe hole arranges circular groove, is provided with seal ring (3) in circular groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410753404.8A CN104500270B (en) | 2014-12-09 | 2014-12-09 | Electronic rotation sliding plate valve type solid rocket ramjet gas flow regulates device |
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| CN201410753404.8A CN104500270B (en) | 2014-12-09 | 2014-12-09 | Electronic rotation sliding plate valve type solid rocket ramjet gas flow regulates device |
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| CN104500270A true CN104500270A (en) | 2015-04-08 |
| CN104500270B CN104500270B (en) | 2016-07-06 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201687A (en) * | 2015-09-02 | 2015-12-30 | 南京理工大学 | Electric sliding discal valve type gas flow regulating device for solid rocket propellant ramjet |
| CN105404317A (en) * | 2015-12-10 | 2016-03-16 | 西安航天动力研究所 | Steady flow type multistage flow regulator |
| CN106121865A (en) * | 2016-03-14 | 2016-11-16 | 中国运载火箭技术研究院 | A kind of solid rocket ramjet gas flow self-checking device |
| CN106224127A (en) * | 2016-09-09 | 2016-12-14 | 北京精密机电控制设备研究所 | A kind of solid rocket ramjet gas flow adjusting means |
| CN106870203A (en) * | 2017-03-30 | 2017-06-20 | 内蒙动力机械研究所 | The scramjet engine of fluidized powder propellant |
| CN109944713A (en) * | 2019-03-20 | 2019-06-28 | 中国人民解放军国防科技大学 | Gas flow regulating device and gas generator of solid rocket ramjet |
| CN110552814A (en) * | 2019-08-16 | 2019-12-10 | 南京理工大学 | Sliding disc valve type solid rocket ramjet flow-adjustable gas generator |
| CN111577484A (en) * | 2020-05-26 | 2020-08-25 | 湖南宏大日晟航天动力技术有限公司 | Gas flow adjusting device of rotary nozzle valve of solid rocket ramjet engine |
| CN111927665A (en) * | 2020-07-10 | 2020-11-13 | 张存劳 | Novel rotary type oil sprayer |
| CN113638823A (en) * | 2021-08-10 | 2021-11-12 | 北京理工大学 | Needle valve type flow-adjustable gas generator ground test device |
| CN115342003A (en) * | 2022-08-31 | 2022-11-15 | 哈尔滨工程大学 | Engine spray pipe structure with adjustable outlet area and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203286095U (en) * | 2013-05-27 | 2013-11-13 | 湖南中技环保能源有限公司 | Automatic flow control three-way valve |
| CN103423032A (en) * | 2013-08-28 | 2013-12-04 | 南京理工大学 | Solid rocket ramjet fuel gas flow regulation device driven by linear motor |
| CN203627030U (en) * | 2013-10-21 | 2014-06-04 | 天津雷沃动力有限公司 | Air inflow adjusting device |
| US20140338641A1 (en) * | 2007-04-16 | 2014-11-20 | Vianney Rabhi | Electrohydraulic device for closed-loop driving the control jack of a variable compression ratio engine |
-
2014
- 2014-12-09 CN CN201410753404.8A patent/CN104500270B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140338641A1 (en) * | 2007-04-16 | 2014-11-20 | Vianney Rabhi | Electrohydraulic device for closed-loop driving the control jack of a variable compression ratio engine |
| CN203286095U (en) * | 2013-05-27 | 2013-11-13 | 湖南中技环保能源有限公司 | Automatic flow control three-way valve |
| CN103423032A (en) * | 2013-08-28 | 2013-12-04 | 南京理工大学 | Solid rocket ramjet fuel gas flow regulation device driven by linear motor |
| CN203627030U (en) * | 2013-10-21 | 2014-06-04 | 天津雷沃动力有限公司 | Air inflow adjusting device |
Non-Patent Citations (4)
| Title |
|---|
| 侯晓静等: ""固冲发动机燃气流量调节阀设计与调节特性研究"", 《弹箭与制导学报》 * |
| 兰飞强等: ""一种固冲发动机用流量调节装置设计"", 《弹箭与制导学报》 * |
| 杨石林等: ""滑盘式流量调节燃气发生器动态特性分析"", 《固体火箭技术》 * |
| 鲍文等: ""固体火箭冲压发动机燃气发生器及燃气流量调节阀建模及仿真"", 《固体火箭技术》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201687A (en) * | 2015-09-02 | 2015-12-30 | 南京理工大学 | Electric sliding discal valve type gas flow regulating device for solid rocket propellant ramjet |
| CN105404317A (en) * | 2015-12-10 | 2016-03-16 | 西安航天动力研究所 | Steady flow type multistage flow regulator |
| CN105404317B (en) * | 2015-12-10 | 2017-11-21 | 西安航天动力研究所 | A kind of constant-current type multistage flow regulator |
| CN106121865A (en) * | 2016-03-14 | 2016-11-16 | 中国运载火箭技术研究院 | A kind of solid rocket ramjet gas flow self-checking device |
| CN106224127A (en) * | 2016-09-09 | 2016-12-14 | 北京精密机电控制设备研究所 | A kind of solid rocket ramjet gas flow adjusting means |
| CN106224127B (en) * | 2016-09-09 | 2018-06-29 | 北京精密机电控制设备研究所 | A kind of solid rocket ramjet gas flow regulating device |
| CN106870203A (en) * | 2017-03-30 | 2017-06-20 | 内蒙动力机械研究所 | The scramjet engine of fluidized powder propellant |
| CN109944713B (en) * | 2019-03-20 | 2020-01-24 | 中国人民解放军国防科技大学 | Gas flow regulating device and gas generator of solid rocket ramjet |
| CN109944713A (en) * | 2019-03-20 | 2019-06-28 | 中国人民解放军国防科技大学 | Gas flow regulating device and gas generator of solid rocket ramjet |
| CN110552814A (en) * | 2019-08-16 | 2019-12-10 | 南京理工大学 | Sliding disc valve type solid rocket ramjet flow-adjustable gas generator |
| CN110552814B (en) * | 2019-08-16 | 2022-04-08 | 南京理工大学 | Sliding disc valve type solid rocket ramjet flow-adjustable gas generator |
| CN111577484A (en) * | 2020-05-26 | 2020-08-25 | 湖南宏大日晟航天动力技术有限公司 | Gas flow adjusting device of rotary nozzle valve of solid rocket ramjet engine |
| CN111927665A (en) * | 2020-07-10 | 2020-11-13 | 张存劳 | Novel rotary type oil sprayer |
| CN113638823A (en) * | 2021-08-10 | 2021-11-12 | 北京理工大学 | Needle valve type flow-adjustable gas generator ground test device |
| CN113638823B (en) * | 2021-08-10 | 2022-06-17 | 北京理工大学 | Needle valve type flow-adjustable gas generator ground test device |
| CN115342003A (en) * | 2022-08-31 | 2022-11-15 | 哈尔滨工程大学 | Engine spray pipe structure with adjustable outlet area and control method |
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