CN113740047B - Universal liquid flow test device suitable for outer nozzle in central nozzle assembly - Google Patents
Universal liquid flow test device suitable for outer nozzle in central nozzle assembly Download PDFInfo
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- CN113740047B CN113740047B CN202111106775.3A CN202111106775A CN113740047B CN 113740047 B CN113740047 B CN 113740047B CN 202111106775 A CN202111106775 A CN 202111106775A CN 113740047 B CN113740047 B CN 113740047B
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- outer nozzle
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 239000007788 liquid Substances 0.000 title claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 46
- 238000004088 simulation Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000007704 transition Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 8
- 238000013461 design Methods 0.000 abstract description 4
- 238000011056 performance test Methods 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 208000025962 Crush injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nozzles (AREA)
Abstract
The invention discloses a universal liquid flow test device suitable for an outer nozzle in a central nozzle assembly, which comprises a shell, a top cover, a sealing element, an inner nozzle simulation element and a lower positioning element; the shell and the top cover form a test chamber; a water inlet interface and a pressure measuring interface are arranged on the side wall of the shell; the sealing element is positioned in the test chamber, one end of the sealing element is connected with the top cover, the other end of the sealing element is connected with the upper end of the inner nozzle simulation element, and the outer circular surface of the sealing element is tightly attached to the inner wall of the shell; a lower locating piece is arranged in the bottom plate of the shell, and a step through hole is formed in the lower locating piece; the lower end of the outer nozzle to be tested is matched with the large hole of the step through hole, and the lower end of the inner nozzle simulation piece is inserted into the upper end of the outer nozzle to be tested. The device not only meets the requirements of the liquid flow performance test of the outer nozzle in the central nozzle assembly, but also has reasonable and compact overall structural design and convenient assembly and disassembly, and simultaneously can meet the test of the outer nozzles with various sizes by only replacing the inner nozzle simulation piece and the lower positioning piece.
Description
Technical Field
The invention relates to a test device, in particular to a device suitable for a central nozzle assembly
A universal liquid flow test device of a middle and outer nozzle.
Background
In the development process of the thrust chamber generator, the nozzle performance parameters need to be measured before the central nozzle assembly is welded.
Flow test requirements for a center nozzle assembly: the water can only enter the annular flow channel formed between the inner nozzle and the outer nozzle from the radial hole of the outer nozzle, then is sprayed out from the outer nozzle, and is required to be carried out in a real product assembling state, and the radial hole of the outer nozzle is required to be ensured to be unblocked during assembling according to the requirement of a qualified central nozzle assembly.
At present, no disclosure is made in the field at home and abroad about the liquid flow test device of the outer nozzle in the central nozzle assembly, and because a plurality of central nozzle assemblies with different sizes are usually installed on one thrust chamber, unnecessary waste is caused if the liquid flow test device is designed for each size of central nozzle assembly.
Disclosure of Invention
The invention aims to provide a universal liquid flow test device suitable for an outer nozzle in a central nozzle assembly, so that the problem of accurate liquid flow test of the outer nozzle of the central nozzle assembly with various sizes is solved.
The specific technical scheme of the invention is as follows:
A general type liquid flow test device suitable for outer nozzle in central nozzle assembly, its characterized in that: comprises a shell, a top cover, a sealing element, an inner nozzle simulation element and a lower positioning element;
The shell and the top cover form a test chamber; a water inlet interface and a pressure measuring interface are arranged on the side wall of the shell;
The sealing element is positioned in the test chamber, one end of the sealing element is connected with the top cover, the other end of the sealing element is connected with the upper end of the inner nozzle simulation element, and the outer circular surface of the sealing element is tightly attached to the inner wall of the shell;
A lower locating piece is arranged in the bottom plate of the shell, and a step through hole is formed in the lower locating piece;
The lower end of the outer nozzle to be tested is matched with the large hole of the step through hole, and the lower end of the inner nozzle simulation piece is inserted into the upper end of the outer nozzle to be tested; the inner nozzle simulation piece is made of fluorotetramer polyethylene material.
Further, sealing rings are arranged between the outer circle surface of the sealing piece and the inner wall of the shell, and between the lower positioning piece and the bottom plate of the shell; a protection pad is arranged between the end face of the lower end of the outer nozzle to be tested and the transition face of the step through hole, which is connected with the big hole and the small hole.
Further, the sealing element comprises an upper positioning section, an intermediate transition section and a lower sealing section;
the upper positioning section is matched with a blind hole arranged in the center of the top cover;
the outer circle surface of the lower sealing section is tightly attached to the inner wall of the shell;
The outer diameter of the middle transition section is smaller than that of the upper positioning section and smaller than that of the lower sealing section.
Further, the upper end of the inner nozzle simulation piece is embedded in the central blind hole at the lower end of the lower sealing section.
Further, the top cover and the shell are connected through threads.
Further, the small hole of the step through hole is a conical hole, and the large end of the conical hole is downward.
Further, the number of the water inlet interfaces is two, the water inlet interfaces are symmetrically arranged on the shell, and the two water inlet interfaces are positioned above the radial holes of the outer nozzle to be tested.
Further, the pressure measuring interface is positioned below the water inlet interface and is equal to the radial hole of the outer nozzle in height.
Further, at least two notches for being matched with the disassembling spanner are formed in the lower positioning piece.
The beneficial effects of the invention are as follows:
1. The invention adopts the test device composed of the shell, the top cover, the sealing element, the inner nozzle simulation element and the lower positioning element, not only meets the requirement of the liquid flow performance test of the outer nozzle in the central nozzle assembly, but also has reasonable and compact overall structural design and convenient assembly and disassembly, obtains the flow value of the annular flow channel formed by the inner nozzle and the outer nozzle when the inner nozzle is stabilized in the shell and the spray angle generated by the nozzle assembly through the test, provides powerful support for the inner nozzle to select the qualified outer nozzle, and only needs to replace the inner nozzle simulation element and the lower positioning element when the central nozzle assembly with different sizes is tested by the test device, so that the test device has stronger universality.
2. The inner nozzle simulation piece is made of fluorotetramer, so that the outer nozzle to be tested is protected from being deformed due to crush injury, and the radial holes of the outer nozzle are ensured to be smooth.
3. According to the invention, the outer nozzle to be tested, the inner nozzle simulation piece, the sealing piece and the top cover are limited by progressive insertion, so that concentricity of each key part in the test device is ensured.
4. The small holes in the step through holes of the lower locating piece are conical holes, the size of the conical holes is set based on the condition that the spray cone of a shielding product is not touched, and the purpose of the invention is to conveniently measure the performance parameter of the spray cone angle.
5. The sealing rings are arranged between the outer circle surface of the lower sealing section of the sealing element and the inner wall of the shell and between the lower positioning element and the bottom plate of the shell, and the design of the two sealing rings solves the problem that water can only enter the annular flow channel between the inner nozzle and the outer nozzle from the radial hole of the outer nozzle to be tested, so that the leakage among all parts in the test process is avoided, and the reliability and the accuracy of the test result are ensured; and a protection pad is arranged between the end surface of the lower end of the outer nozzle to be tested and the transition surface of the step through hole, which is connected with the big hole and the small hole, so that the scratch of the outer nozzle is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the test apparatus.
Fig. 2 is a schematic structural view of the housing.
Fig. 3 is a schematic structural view of the top cover.
Fig. 4 is a schematic structural view of the lower positioning member.
Fig. 5 is a top view of the lower fixture.
The reference numerals are as follows:
1-shell, 2-top cover, 3-sealing element, 31-upper positioning section, 32-middle transition section, 33-lower sealing section, 4-inner nozzle simulation element, 5-lower positioning element, 6-test chamber, 7-water inlet interface, 8-pressure measuring interface, 9-outer nozzle, 10-mounting hole, 11-step through hole, 111-taper hole, 12-sealing ring, 13-protection pad and 14-notch.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Also in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixedly connected, detachably connected or integrally connected: it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In a central nozzle assembly used by a thrust chamber generator, one end of an inner nozzle is inserted into an outer nozzle, so that an annular flow channel is formed between the inner nozzle and the outer nozzle, a working medium enters the annular flow channel from a radial hole of the outer nozzle and then is sprayed outwards through the outer nozzle, and meanwhile, as the central nozzle assemblies with various different sizes are arranged in the same thrust chamber, whether the outer nozzle is a qualified product or not is rapidly and accurately judged through a test.
As shown in fig. 1, the test device includes a housing 1, a top cover 2, a seal 3, an inner nozzle simulator 4, and a lower positioning member 5; the shell 1 and the top cover 2 form a test chamber 6; in this embodiment, the housing 1 and the top cover 2 are connected by screw threads.
As shown in fig. 2, a water inlet port 7 and a pressure measuring port 8 are arranged on the side wall of the shell 1; the design of the shell 1 takes the principle of simulating the actual flow state of a product as far as possible, and two symmetrical water inlet interfaces 7 are designed to ensure that water uniformly enters the tool; the water inlet port 7 is sized to ensure that water enters the test chamber at the desired flow rate and the housing 1 is sized to ensure that water enters the outer nozzle 9 at the desired flow rate. The pressure measuring interface 8 needs to ensure the same height as the radial hole (shown at A in figure 1) of the outer nozzle 9 as much as possible, so as to ensure accurate pressure measurement, and the bottom plate of the shell 1 is provided with a mounting hole 10.
As shown in fig. 1 and 4, the lower positioning piece 5 is provided with a step through hole 11, a large hole of the step through hole 11 is used for being matched with the lower end of the outer nozzle 9 to be tested, a small hole of the step through hole 11 is a conical hole 111, the size of the conical hole 111 is set based on the condition that a product spray cone is not blocked, and the measurement of a spray angle is convenient. In order to meet the installation requirements of outer nozzles with different sizes, the lower locating piece 5 is in threaded connection with the installation hole 10, and when the outer nozzle 9 needs to be replaced, only the lower locating piece 5 and the inner nozzle simulation piece 4 of the stepped through holes 11 with different sizes need to be replaced. The method is characterized in that: as shown in fig. 5, at least two notches 14 for being matched with a disassembling wrench are formed in the lower positioning piece 5, and the wrench stretches into the notches 14, so that the lower positioning piece 5 can be easily disassembled and assembled.
As shown in fig. 1 and 3, the sealing member 3 is positioned in the test chamber 6, one end of the sealing member 3 is connected with the top cover 2, the other end is connected with the upper end of the inner nozzle simulation member 4, and the outer circular surface of the sealing member 3 is tightly attached to the inner wall of the shell 1; specifically, the seal 3 includes an upper positioning section 31, an intermediate transition section 32, and a lower seal section 33, and the intermediate transition section outer diameter 32 < the upper positioning section outer diameter 31 < the lower seal section outer diameter 33; because the middle transition section 32 is designed with a small outer diameter, the upper positioning section 31 has a large outer diameter, thereby facilitating the assembly and disassembly of the sealing element. The upper positioning section 31 is matched with a blind hole arranged in the center of the top cover 2, the outer circle surface of the lower sealing section 33 is tightly attached to the inner wall of the shell 1, and the upper end of the inner nozzle simulation piece 4 is embedded in the central blind hole at the lower end of the lower sealing section 33, so that the coaxiality of the inner nozzle simulation piece 4, the sealing piece 3 and the top cover 2 in the installation process is ensured.
The lower end of the inner nozzle simulation member 4 is inserted into the lower end of the outer nozzle 9 to be tested, an annular flow passage (a region B shown in FIG. 1) is formed between the lower end and the inner nozzle simulation member, and the insertion part is made of polytetrafluoroethylene material,
In order to ensure the tightness of the whole test apparatus, a seal ring 12 is provided between the outer circumferential surface of the lower seal segment 33 of the seal member 3 and the inner wall of the housing 1, and between the lower positioning member 5 and the bottom plate of the housing 1.
And a protection pad 13 is arranged between the end surface of the lower end of the outer nozzle 9 to be tested and the transition surface of the step through hole 11 for connecting the big hole and the small hole, so as to avoid the outer nozzle to be tested from being crushed or scratched.
Before the test, selecting a proper lower positioning piece and an inner nozzle simulation piece according to the size of the central nozzle, then installing the lower positioning piece on a bottom plate of the shell, and then sequentially installing an outer nozzle to be tested, the inner nozzle simulation piece, a sealing piece and a top cover to start the test; during testing, test water is introduced into the test chamber through the water inlet interface of the shell, enters the inner part of the outer nozzle through the radial hole on the outer nozzle and is finally sprayed out; in this process, it is necessary to measure the flow rate through the nozzle assembly and the spray angle formed after spraying water when the pressure in the chamber is stabilized, thereby determining whether the outer nozzle is a good product.
Claims (9)
1. A general type liquid flow test device suitable for outer nozzle in central nozzle assembly, its characterized in that: comprises a shell, a top cover, a sealing element, an inner nozzle simulation element and a lower positioning element;
The shell and the top cover form a test chamber; a water inlet interface and a pressure measuring interface are arranged on the side wall of the shell;
The sealing element is positioned in the test chamber, one end of the sealing element is connected with the top cover, the other end of the sealing element is connected with the upper end of the inner nozzle simulation element, and the outer circular surface of the sealing element is tightly attached to the inner wall of the shell;
The bottom plate of the shell is provided with a mounting hole, the lower locating piece is connected with the mounting hole through threads, and the lower locating piece is provided with a step through hole;
The lower end of the outer nozzle to be tested is matched with the large hole of the step through hole, and the lower end of the inner nozzle simulation piece is inserted into the upper end of the outer nozzle to be tested; the inner nozzle simulation piece is made of fluorotetramer polyethylene material.
2. The universal fluid flow test apparatus for an outer nozzle in a center nozzle assembly as set forth in claim 1 wherein: sealing rings are arranged between the outer circle surface of the sealing piece and the inner wall of the shell and between the lower positioning piece and the bottom plate of the shell; a protection pad is arranged between the end face of the lower end of the outer nozzle to be tested and the transition face of the step through hole, which is connected with the big hole and the small hole.
3. The universal fluid flow test apparatus for an outer nozzle in a center nozzle assembly as set forth in claim 2 wherein: the sealing element comprises an upper positioning section, a middle transition section and a lower sealing section;
the upper positioning section is matched with a blind hole arranged in the center of the top cover;
the outer circle surface of the lower sealing section is tightly attached to the inner wall of the shell;
The outer diameter of the middle transition section is smaller than that of the upper positioning section and smaller than that of the lower sealing section.
4. A universal fluid flow test apparatus for use with an outer nozzle in a center nozzle assembly as set forth in claim 3, wherein: the upper end of the inner nozzle simulation piece is embedded in the central blind hole at the lower end of the lower sealing section.
5. A universal fluid flow test apparatus for an outer nozzle in a center nozzle assembly as claimed in any one of claims 1-4, wherein: the top cover is in threaded connection with the shell.
6. The universal fluid flow test apparatus for an outer nozzle in a center nozzle assembly as set forth in claim 5, wherein: the small hole of the step through hole is a conical hole, and the large end of the conical hole is downward.
7. The universal fluid flow test apparatus for an outer nozzle in a center nozzle assembly as set forth in claim 6, wherein: the number of the water inlet interfaces is two, the water inlet interfaces are symmetrically arranged on the shell, and the two water inlet interfaces are positioned above the radial holes of the outer nozzle to be tested.
8. The universal fluid flow test apparatus for an outer nozzle in a center nozzle assembly as set forth in claim 7 wherein: the pressure measuring interface is positioned below the water inlet interface and is equal to the radial hole of the outer nozzle in height.
9. The universal fluid flow test apparatus for an outer nozzle in a center nozzle assembly as set forth in claim 8 wherein: at least two notches for being matched with the disassembling spanner are formed in the lower locating piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111106775.3A CN113740047B (en) | 2021-09-22 | 2021-09-22 | Universal liquid flow test device suitable for outer nozzle in central nozzle assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111106775.3A CN113740047B (en) | 2021-09-22 | 2021-09-22 | Universal liquid flow test device suitable for outer nozzle in central nozzle assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113740047A CN113740047A (en) | 2021-12-03 |
| CN113740047B true CN113740047B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111106775.3A Active CN113740047B (en) | 2021-09-22 | 2021-09-22 | Universal liquid flow test device suitable for outer nozzle in central nozzle assembly |
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| CN113740047A (en) | 2021-12-03 |
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