CN216142984U - Jet pump - Google Patents
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- CN216142984U CN216142984U CN202121484822.3U CN202121484822U CN216142984U CN 216142984 U CN216142984 U CN 216142984U CN 202121484822 U CN202121484822 U CN 202121484822U CN 216142984 U CN216142984 U CN 216142984U
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Abstract
The utility model belongs to the technical field of jet pump structural design is collected to aircraft fuel, concretely relates to jet pump, this jet pump includes that the draught tube, draws and penetrate pipe, nozzle, choke, diffusion tube, jet pipe, wherein, draws the diameter that penetrates the pipe
Outlet diameter of nozzle
Diameter of suction inlet of suction pipe
Diameter of throat
Diameter of jet pipe
Wherein Q is the design flow rate of the working fluid; v1Designing the flow speed of the working fluid in the ejector pipe; mu.s1Is the kinematic viscosity of the working fluid; g is the acceleration of gravity; a is an optimization coefficient; Δ poThe pressure difference of the working fluid from the injection end of the injection pipe to the outlet of the nozzle is obtained; ρ is the density of the working fluid; Δ Q is the design flow of the suction fluid; v2A design flow rate for the suction fluid at the suction inlet of the suction tube; m is the ratio of the sectional area of the throat to the outlet area of the nozzle; v3The designed flow rate of the working fluid and the suction fluid in the jet pipe is provided.
Description
Technical Field
The application belongs to the technical field of structural design of aircraft fuel collecting jet pumps, and particularly relates to a jet pump.
Background
Aircraft fuel oil system includes the fuel tank, the fuel output pump that sets up in the fuel tank, and the fuel output pump is used for the fuel output in the fuel tank, mostly is bulky, large-traffic pump, and along with the reduction of fuel in the fuel tank, the liquid level of surplus fuel drops to the sunction inlet that is less than fuel output pump, and fuel output pump can no longer be with this part fuel output, and at this moment, need collect the pump with the fuel of sunction inlet low, small volume, low discharge, collects and utilizes this part fuel.
The fuel oil collecting pump has the advantages of high reliability and convenient installation, is mostly used as a fuel oil collecting pump in a fuel oil tank of an aircraft fuel oil system, and comprises the following components:
the suction pipe is provided with an injection hole, one end of the suction pipe is a suction inlet, the other end of the suction pipe is an outflow outlet, and a suction chamber is formed inside the suction pipe;
one end of the injection pipe is an injection end, and the other end of the injection pipe is an injection end; the injection end extends into the flow suction pipe from the injection hole and extends towards the flow outlet;
the nozzle is connected to the spraying end;
the inlet end of the throat pipe is butted with the outflow port;
the inlet end of the diffusion pipe is butted with the outlet end of the throat pipe;
and the inlet end of the drainage pipe is butted with the outlet end of the diffusion pipe.
The current jet pump has the following defects:
the design is not standard, the performance and the requirement of the device cannot be well matched, and the efficiency is low.
The present application has been made in view of the above-mentioned technical drawbacks.
It should be noted that the above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and the above background disclosure should not be used for evaluating the novelty and inventive step of the present application without explicit evidence to suggest that the above content is already disclosed at the filing date of the present application.
Disclosure of Invention
It is an object of the present application to provide a jet pump to overcome or mitigate at least one aspect of the technical deficiencies known to exist.
The technical scheme of the application is as follows:
a jet pump comprises an absorber pipe, an ejector pipe, a nozzle, a throat pipe, a diffuser pipe and a jet pipe, wherein,
diameter of the injection pipe
Outlet diameter of nozzle
Diameter of suction inlet of suction pipe
Diameter of throat
Diameter of jet pipe
Wherein the content of the first and second substances,
q is the design flow of the working fluid;
V1designing the flow speed of the working fluid in the ejector pipe;
μ1is the kinematic viscosity of the working fluid;
g is the acceleration of gravity;
a is an optimization coefficient;
Δpothe pressure difference of the working fluid from the injection end of the injection pipe to the outlet of the nozzle is obtained;
ρ is the density of the working fluid;
Δ Q is the design flow of the suction fluid;
V2a design flow rate for the suction fluid at the suction inlet of the suction tube;
m is the ratio of the sectional area of the throat to the outlet area of the nozzle;
V3the designed flow rate of the working fluid and the suction fluid in the jet pipe is provided.
According to at least one embodiment of the present invention, in the above-mentioned jet pump, when m is 1.5 to 2.5, a is 0.8;
when m is 2.5 to 25, a is 0.75.
According to at least one embodiment of the present application, in the jet pump described above, the length L of the nozzle1＝(0.25～0.5)D2；
Distance L from nozzle outlet to throat inletc＝(1～2.5)D2。
According to at least one embodiment of the present application, in the jet pump described above, the length L of the throat pipe2＝(6～8)D4；
Length of diffuser tube
Drawings
Fig. 1 is a schematic structural diagram of a jet pump provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of one aspect of a jet pump provided by an embodiment of the present application;
FIG. 3 is a schematic diagram of another aspect of a jet pump provided by an embodiment of the present application;
FIG. 4 is a schematic diagram of yet another aspect of a jet pump provided by an embodiment of the present application;
wherein:
1-a suction pipe; 2-an injection pipe; 3-a nozzle; 4-a throat; 5-a diffusion tube; 6-jet pipe.
For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; further, the drawings are for illustrative purposes, and terms describing positional relationships are limited to illustrative illustrations only and are not to be construed as limiting the patent.
Detailed Description
In order to make the technical solutions and advantages of the present application clearer, the technical solutions of the present application will be further clearly and completely described in the following detailed description with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only some of the embodiments of the present application, and are only used for explaining the present application, but not limiting the present application. It should be noted that, for convenience of description, only the parts related to the present application are shown in the drawings, other related parts may refer to general designs, and the embodiments and technical features in the embodiments in the present application may be combined with each other to obtain a new embodiment without conflict.
In addition, unless otherwise defined, technical or scientific terms used in the description of the present application shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like used in the description of the present application, which indicate orientations, are used only to indicate relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly, and thus, should not be construed as limiting the present application. The use of "first," "second," "third," and the like in the description of the present application is for descriptive purposes only to distinguish between different components and is not to be construed as indicating or implying relative importance. The use of the terms "a," "an," or "the" and similar referents in the context of describing the application is not to be construed as an absolute limitation on the number, but rather as the presence of at least one. The word "comprising" or "comprises", and the like, when used in this description, is intended to specify the presence of stated elements or items, but not the exclusion of other elements or items.
Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.
The present application is described in further detail below with reference to fig. 1 to 4.
The characteristics of a jet pump can be characterized by the following dimensionless quantities, as shown in fig. 2:
the flow ratio of the working fluid sucked into the suction inlet of the suction pipe 1 and the working fluid in the injection pipe 2
The pressure ratio of the suction fluid and the working fluid at the outlet end of the jet pipe 6
The unit weight gamma is rho g;
cross section of throat 4 and area ratio of outlet of nozzle 3
Wherein:
Qsthe flow rate of the fluid sucked into the suction inlet of the suction pipe 1;
Qothe flow rate of the working fluid in the injection pipe 2;
△pcthe pressure difference of fluid sucked from the outlet end of the jet pipe 6 and the suction inlet of the suction pipe 1 is obtained;
△pothe pressure difference of the working fluid from the injection end of the injection pipe 2 to the outlet of the nozzle 3;
pcis the hydrostatic pressure at the outlet end of the jet pipe 6;
vcthe fluid flow rate at the outlet end of the jet pipe 6;
γcthe volume weight of the fluid at the outlet end of the jet pipe 6;
g is the acceleration of gravity;
zcthe height of the outlet end of the jet pipe 6; (ii) a
psThe static pressure of the fluid sucked into the suction inlet of the suction pipe 1;
vsthe flow rate of the fluid sucked into the suction inlet of the suction pipe 1;
zsthe height of the suction inlet of the suction pipe 1;
γsthe volume weight of the fluid sucked into the suction pipe 1;
p0static pressure of working fluid at the injection end of the injection pipe 2;
v0the flow speed of the working fluid at the injection end of the injection pipe 2 is controlled;
z0the position height of the injection end working fluid of the injection pipe 2 is set;
γ0is an injection end of an injection pipe 2A volume of working fluid;
f2the sectional area of the throat 4;
f1is the area of the nozzle 3 outlet.
When the jet pump works, pressure and speed of working fluid entering from the ejector pipe 2 and suction fluid sucked from a suction inlet of the suction pipe 1 are changed violently, wherein the energy transfer process is that the working fluid provides energy, the working fluid is mixed with the suction fluid, and the working fluid and the suction fluid generate friction loss in the flowing process, under the premise of energy conservation, a velocity field and a pressure field on each section of the jet pump are assumed to be uniformly distributed, as shown in fig. 3, a momentum equation from a section 3-3 to a section 5-5, and bernoulli equations from a section 2-2 to a section 3-3, a section 1-1 to a section 3-3, and a section 5-5 to a section 6-6 can be derived to obtain a basic performance equation of the jet pump:
wherein the content of the first and second substances,
the jet pump numerical calculation and test data distribution rule show that the distribution rule of the jet pump in the working area is close to a straight line, and a single-phase fluid jet pump basic performance equation can be obtained after the arrangement according to the basic size and the electric calculation value of the jet pump, and the formula can be further simplified as follows:
the optimal area ratio can be expressed as
Wherein the content of the first and second substances,
when m is 1.5-2.5, a is 0.8;
and when m is 2.5-25, a is 0.75.
The embodiment of the application provides a jet pump, which comprises an ejector pipe 1, an ejector pipe 2, a nozzle 3, a throat pipe 4, a diffusion pipe 5 and a jet pipe 6, wherein,
diameter of the injection pipe 2
Outlet diameter of nozzle 3
Suction inlet diameter of suction pipe 1
Diameter of throat 4
Diameter of jet pipe 6
Wherein the content of the first and second substances,
q is the design flow of the working fluid;
V1designing the flow speed of the working fluid in the injection pipe 2;
μ1is the kinematic viscosity of the working fluid;
g is the acceleration of gravity;
a is an optimization coefficient;
Δpothe pressure difference of the working fluid from the injection end of the injection pipe 2 to the outlet of the nozzle 3 is obtained;
ρ is the density of the working fluid;
Δ Q is the design flow of the suction fluid;
V2the designed flow speed of the suction fluid at the suction port of the suction pipe 1 is provided;
m is the ratio of the cross-sectional area of the throat 4 to the outlet area of the nozzle 3;
V3the flow rate of the working fluid and the suction fluid in the jet pipe 6 is designed.
For the jet pump disclosed in the above embodiments, it will be understood by those skilled in the art that the diameter D of the critical-geometry ejector pipe 2 of the jet pump is determined based on the basic performance parameters of the jet pump in combination with the basic performance equation1Outlet diameter D of nozzle 32Diameter D of suction inlet of suction pipe 13Diameter D of throat 44Diameter D of jet pipe 65The design is carried out, feasible specifications can be provided for the design of the jet pump, the performance of the jet pump can be well matched with the requirement, and the jet pump has high efficiency.
In some optional embodiments, in the above jet pump, when m is 1.5 to 2.5, a is 0.8;
when m is 2.5 to 25, a is 0.75.
In some alternative embodiments, in the jet pump described above, the length L of the nozzle 31＝(0.25～0.5)D2；
Distance L from the outlet of the nozzle 3 to the inlet end of the throat 4c＝(1～2.5)D2。
In some alternative embodiments, in the jet pump described above, the length L of the throat 42＝(6～8)D4；
Length of the diffuser pipe 5
For the jet pump disclosed in the above embodiments, it will be understood by those skilled in the art that, in addition to the basic performance parameters, it is possible to measure the diameter D of the jet pipe 2 in conjunction with the basic performance equation for the critical geometry of the jet pump1Outlet diameter D of nozzle 32Diameter D of suction inlet of suction pipe 13Diameter D of throat 44Diameter D of jet pipe 65In addition to the design, the length L of the nozzle 3 is also determined according to the key geometrical parameter1The distance L from the outlet of the nozzle 3 to the inlet end of the throat 4cLength L of throat 42Length L of the diffuser pipe 53The design is carried out, the design of the jet pump can be further standardized, the performance of the jet pump can be well matched with the requirement, and the jet pump has higher efficiency.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.
Claims (4)
1. A jet pump comprises a suction pipe (1), an injection pipe (2), a nozzle (3), a throat pipe (4), a diffusion pipe (5) and a jet pipe (6),
diameter of the injection pipe (2)
Outlet diameter of the nozzle (3)
Diameter of suction inlet of suction pipe (1)
Diameter of the throat (4)
Diameter of jet pipe (6)
Wherein the content of the first and second substances,
q is the design flow of the working fluid;
V1the design flow rate of the working fluid in the ejector pipe (2) is provided;
μ1is the kinematic viscosity of the working fluid;
g is the acceleration of gravity;
a is an optimization coefficient;
Δpothe pressure difference of the working fluid from the injection end of the injection pipe (2) to the outlet of the nozzle (3) is obtained;
ρ is the density of the working fluid;
Δ Q is the design flow of the suction fluid;
V2the designed flow rate of the suction fluid at the suction port of the suction pipe (1) is provided;
m is the ratio of the sectional area of the throat (4) to the outlet area of the nozzle (3);
V3the design flow rate of the working fluid and the suction fluid in the jet pipe (6) is adopted.
2. The jet pump of claim 1,
when m is 1.5-2.5, a is 0.8;
when m is 2.5 to 25, a is 0.75.
3. The jet pump of claim 1,
length L of nozzle (3)1＝(0.25～0.5)D2；
The distance L from the outlet of the nozzle (3) to the inlet end of the throat pipe (4)c＝(1～2.5)D2。
4. The jet pump of claim 1,
length L of throat (4)2＝(6～8)D4；
Length of the diffuser pipe (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121484822.3U CN216142984U (en) | 2021-07-01 | 2021-07-01 | Jet pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121484822.3U CN216142984U (en) | 2021-07-01 | 2021-07-01 | Jet pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216142984U true CN216142984U (en) | 2022-03-29 |
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ID=80802846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202121484822.3U Active CN216142984U (en) | 2021-07-01 | 2021-07-01 | Jet pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115422684A (en) * | 2022-09-26 | 2022-12-02 | 中国矿业大学 | Drilling non-submerged jet fluidization mining process parameter design method |
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2021
- 2021-07-01 CN CN202121484822.3U patent/CN216142984U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115422684A (en) * | 2022-09-26 | 2022-12-02 | 中国矿业大学 | Drilling non-submerged jet fluidization mining process parameter design method |
| CN115422684B (en) * | 2022-09-26 | 2024-05-07 | 中国矿业大学 | Drilling non-submerged jet fluidization mining process parameter design method |
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