CN205926080U - Daraf that nozzle - Google Patents
Daraf that nozzle Download PDFInfo
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- CN205926080U CN205926080U CN201620916389.9U CN201620916389U CN205926080U CN 205926080 U CN205926080 U CN 205926080U CN 201620916389 U CN201620916389 U CN 201620916389U CN 205926080 U CN205926080 U CN 205926080U
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Abstract
The utility model relates to a daraf that nozzle, wherein the nozzle expand gas section, first compression section, toper compression section and toper expansion section including what connect gradually, the nozzle be well casement nozzle, toper expansion section's one end be the jet exit, the diameter of first compression section be less than the diameter that expands the gas section, the diameter of toper compression section diminish gradually along the direction of jet exit, toper expansion section's diameter along the direction of jet exit grow gradually. Adopted the daraf that nozzle among this utility model, carried out gas compression through expanding the gas section one time to first compression section, then at toper compression section secondary compression again, and then one step located to quicken to jet out to toper expansion section to reaching the gaseous jet exit of following of supersonic speed and blowing out, expand the design of gas section department and be connected with back end piece, its screw designs big -endian and guarantees that the device's gas leakproofness is better, and gas can not the seepage.
Description
Technical field
This utility model is related to the design field of nozzle, more particularly, to a kind of Laval-cavity nozzle.
Background technology
Superonic flow nozzzle or Laval superonic flow nozzzle have wide range in the field that every profession and trade is applied.
Laval-cavity nozzle is to be made up of two tapers, and one of is contraction section, and another is expansion segment, is a kind of structure of gas injection
Part.
Utility model content
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, there is provided one kind can eject supersonic speed
Fluid and the Laval-cavity nozzle of good airproof performance.
To achieve these goals, Laval-cavity nozzle of the present utility model has following composition：
This Laval-cavity nozzle, it is mainly characterized by, expansion gas section that described nozzle includes being sequentially connected, the first compression section,
Conical compression section and tapered expansion section, described nozzle is hollow type nozzle, and one end of described tapered expansion section is nozzle
Outlet, the diameter of the first described compression section is less than the diameter of described expansion gas section, and the diameter edge of described conical compression section is sprayed
The direction of mouth outlet tapers into, and the diameter of described tapered expansion section becomes larger along the direction of jet expansion.
It is preferred that the diameter of described expansion gas section：The diameter of the first compression section：The minimum diameter of conical compression section：Taper
The maximum gauge of expansion arc is 73:65:12:13.5.
It is preferred that the length of described expansion gas section：The longitudinal length of the first compression section：The longitudinal length of conical compression section：
The longitudinal length of tapered expansion section is 50:17:64:11.
It is preferred that described expansion gas section inner surface is provided with screw thread, described screw thread tapers into along jet expansion direction.
It is preferred that described expansion gas section is cylindrical expansion gas section, the first described compression section is cylindrical first compression section.
It is preferred that described nozzle is high-temperature alloy nozzle.
Employ the Laval-cavity nozzle in this utility model, carry out a gas pressure through expanding gas section to the first compression section
Contracting, then in conical compression section recompression, and then a step accelerates to project, thus reaching supersonic gas at tapered expansion section
Spray from jet expansion, expanding design at gas section is to be connected with back-end component, and its screw thread design is descending progressive to be to ensure that this dress
More preferably, gas will not seepage for the gas tightness put.
Brief description
Fig. 1 is the longitudinal section structural representation of Laval-cavity nozzle of the present utility model.
Fig. 2 is the left view of Laval-cavity nozzle of the present utility model.
Reference
1 expansion gas section
2 screw threads
3 first compression sections
4 conical compression sections
5 jet expansions
6 tapered expansion sections
7 narrow larynxs
8 Laval-cavity nozzles
Specific embodiment
In order to more clearly describe technology contents of the present utility model, to enter traveling one with reference to specific embodiment
The description of step.
Laval-cavity nozzle of the present utility model, expansion gas section that wherein said nozzle includes being sequentially connected, the first compression section,
Conical compression section and tapered expansion section, described nozzle is hollow type nozzle, and one end of described tapered expansion section is nozzle
Outlet, the diameter of the first described compression section is less than the diameter of described expansion gas section, and the diameter edge of described conical compression section is sprayed
The direction of mouth outlet tapers into, and the diameter of described tapered expansion section becomes larger along the direction of jet expansion.
The diameter expanding gas section described in the utility model：The diameter of the first compression section：The minimum diameter of conical compression section：Cone
The maximum gauge of shape expansion arc is 73:65:12:13.5；The longitudinal length of described expansion gas section：The longitudinal direction of the first compression section is long
Degree：The longitudinal length of conical compression section：The longitudinal length of tapered expansion section is 50:17:64:11.
Expansion gas section inner surface described in the utility model is provided with screw thread, and described screw thread gradually becomes along jet expansion direction
Little；Described expansion gas section is cylindrical expansion gas section, and the first described compression section is cylindrical first compression section；Described nozzle is
High-temperature alloy nozzle.
Laval-cavity nozzle of the present utility model is a kind of contraction and enlargement nozzle, and when gas parameter reaches critical, Mach number is more than
Begin to when equal to 1 select contraction and enlargement nozzle, so that gas is sprayed at a high speed via double inclined plane design, gas is in intimate coaxial direction
Mixing pressurization, carries out a gas compression through expanding gas section the 1 to the first compression section 3, then in conical compression section 4 recompression,
And then one step accelerate at tapered expansion section 6 project, thus reach supersonic gas from jet expansion spray.Expand and set at gas section 1
Meter is to be connected with back-end component, and its screw thread 2 designs the descending progressive gas tightness being to ensure that this device more preferably, and gas will not
Seepage.
Air-flow, under high-pressure effect, through the motion of jet nozzle Way out, enters at the expansion gas section 1 of jet pipe,
In this stage, gas motion follows the principle of " when fluid moves in pipe, the little place in section flow velocity is big, and section general goal flow velocity is little ",
Therefore air-flow constantly accelerates, when reach narrow larynx 7 when, flow velocity has been over velocity of sound, and transonic fluid motion when not
Follow the principle of " the little place in section flow velocity is big, and section general goal flow velocity is little " again, but on the contrary, section is bigger, flow velocity is faster.?
At Φ 13.5, the speed of air-flow is further accelerated, and is 6000 meter per seconds, this creates the terminal huge thrust, Laval nozzle
Actually serve the effect of " flow velocity enhancer ".
Nozzle of the present utility model adopt GH3128 high temperature alloy nozzle, GH3128 be with tungsten, molybdenum solution strengthening and with boron,
Cerium, zirconium strengthen the nickel-base alloy of crystal boundary, have high plasticity, higher durable creeping intensity and good non-oxidizability, fit
For being heated to 1100 DEG C of gas, this nozzle has the high temperature resistant and resistance to characteristic washed away, in addition will not at high temperature by
Heat erosion.
In this description, this utility model is described with reference to its specific embodiment.But it is clear that it is still permissible
Various modification can be adapted and conversion is without departing from spirit and scope of the present utility model.Therefore, specification and drawings are considered as
Illustrative and not restrictive.
Claims (6)
1. a kind of Laval-cavity nozzle it is characterised in that described nozzle include being sequentially connected expansion gas section, the first compression section, cone
Shape compression section and tapered expansion section, described nozzle is hollow type nozzle, and one end of described tapered expansion section goes out for nozzle
Mouthful, the diameter of described the first compression section is less than the diameter of described expansion gas section, and the diameter of described conical compression section is along nozzle
The direction of outlet tapers into, and the diameter of described tapered expansion section becomes larger along the direction of jet expansion.
2. Laval-cavity nozzle according to claim 1 is it is characterised in that the diameter of described expansion gas section：First compression section
Diameter：The minimum diameter of conical compression section：The maximum gauge of tapered expansion section is 73:65:12:13.5.
3. Laval-cavity nozzle according to claim 1 is it is characterised in that the longitudinal length of described expansion gas section：First pressure
The longitudinal length of contracting section：The longitudinal length of conical compression section：The longitudinal length of tapered expansion section is 50:17:64:11.
4. Laval-cavity nozzle according to claim 1 is it is characterised in that described expansion gas section inner surface is provided with screw thread, institute
The screw thread stated tapers into along jet expansion direction.
5. Laval-cavity nozzle according to claim 1 expands gas section, institute it is characterised in that described expansion gas section is cylinder
The first compression section stated is cylindrical first compression section.
6. Laval-cavity nozzle according to claim 1 is it is characterised in that described nozzle is high-temperature alloy nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620916389.9U CN205926080U (en) | 2016-08-22 | 2016-08-22 | Daraf that nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620916389.9U CN205926080U (en) | 2016-08-22 | 2016-08-22 | Daraf that nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205926080U true CN205926080U (en) | 2017-02-08 |
Family
ID=57948601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620916389.9U Active CN205926080U (en) | 2016-08-22 | 2016-08-22 | Daraf that nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205926080U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107366078A (en) * | 2017-08-31 | 2017-11-21 | 浙江理工大学 | A kind of extension nozzle and air-jet loom for air-jet loom |
| CN109275696A (en) * | 2018-11-20 | 2019-01-29 | 大连工业大学 | Nozzle for water jet removal fish scale |
-
2016
- 2016-08-22 CN CN201620916389.9U patent/CN205926080U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107366078A (en) * | 2017-08-31 | 2017-11-21 | 浙江理工大学 | A kind of extension nozzle and air-jet loom for air-jet loom |
| CN109275696A (en) * | 2018-11-20 | 2019-01-29 | 大连工业大学 | Nozzle for water jet removal fish scale |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |