CN212710049U - Thrust measuring device of air-conditioning engine - Google Patents
Thrust measuring device of air-conditioning engine Download PDFInfo
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- CN212710049U CN212710049U CN202021140660.7U CN202021140660U CN212710049U CN 212710049 U CN212710049 U CN 212710049U CN 202021140660 U CN202021140660 U CN 202021140660U CN 212710049 U CN212710049 U CN 212710049U
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Abstract
The utility model discloses a thrust measuring device of a cold air engine, which comprises a fixed frame component and a movable frame component arranged on the fixed frame component, wherein a thrust sensor is arranged on the fixed frame component, and the top of the thrust sensor is provided with a first connecting position used for being connected with the front end of a thrust chamber of the cold air engine; the movable frame assembly is in sliding fit with the fixed frame assembly along the vertical direction, a second connecting position used for being connected with the air injection end of the thrust chamber is arranged on the movable frame assembly, and the second connecting position and the first connecting position are arranged in a right-to-right mode in the vertical direction. This air conditioning engine thrust measuring device, at the practical application in-process, the effectual interference of avoiding gravity and self internal pressure to the measuring result has eliminated thrust measuring error, has promoted the accuracy of measuring result greatly.
Description
Technical Field
The utility model relates to an engine thrust test technical field especially relates to a cool air engine thrust measuring device.
Background
The cold air engine is mainly used for attitude adjustment of spacecrafts such as rockets, satellites and the like, and generates reaction thrust according to Newton's third law by expanding and accelerating high-pressure inert gas. The cold air propulsion engine directly changes the pressure energy into kinetic energy without any chemical reaction.
The thrust of a cold air engine is generally below 300N, belonging to a small thrust magnitude, and the self weight is generally dozens of N. Because the thrust generating axis of the existing attitude hole engine testing device is in the horizontal direction, the self gravity of the engine has certain interference on the measurement of the horizontal thrust, and the measurement error of the thrust is larger, so that the measurement result is inaccurate.
In summary, how to solve the problem of inaccurate measurement result due to large measurement error of the thrust of the cold air engine thrust measurement device has become a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cool air engine thrust measuring device to solve cool air engine thrust measuring device's the great unsafe problem of measuring result that causes of thrust measuring error.
In order to achieve the purpose, the utility model provides a cool air engine thrust measuring device, which comprises a fixed frame component and a movable frame component arranged on the fixed frame component, wherein a thrust sensor is arranged on the fixed frame component, and the top of the thrust sensor is provided with a first connecting position used for being connected with the front end of a thrust chamber of the cool air engine; the movable frame assembly is in sliding fit with the fixed frame assembly along the vertical direction, a second connecting position used for being connected with the air injection end of the thrust chamber is arranged on the movable frame assembly, and the second connecting position and the first connecting position are arranged in the vertical direction in a right-to-right mode.
Preferably, the fixed frame assembly comprises a lower fixed support plate and a slide rail which is arranged on the lower fixed support plate and is arranged along the vertical direction, and the thrust sensor is arranged on the lower fixed support plate; the movable frame assembly comprises a sliding support plate and a sliding block which is arranged on the sliding support plate and is in sliding fit with the sliding rail, and the second connecting position is arranged on the sliding support plate.
Preferably, the slide rail is a positioning rod arranged on the lower fixing support plate, and the positioning rods are uniformly arranged along the circumferential direction of the lower fixing support plate; the sliding block is a sliding sleeve sleeved on the positioning rod.
Preferably, the sliding support plate comprises a central circular plate and a plurality of sub-support plates extending radially outwards from the outer edge of the central circular plate, and a through hole for the air flow to penetrate through of the air injection end is formed in the middle of the central circular plate; the sub support plates correspond to the positioning rods one to one, and the sliding sleeves are arranged at the tail ends of the sub support plates.
Preferably, a plurality of hollowed holes are formed in the central circular plate, and the hollowed holes are uniformly arranged along the circumferential direction of the through hole.
Preferably, the sliding sleeve is a linear bearing.
Preferably, the fixed frame assembly further comprises an upper fixed support plate arranged opposite to the lower fixed support plate, and the top end of the positioning rod is fixedly connected with the upper fixed support plate.
Preferably, the upper fixing support plate is of a circular ring structure.
Preferably, the middle part of the lower fixing support plate is provided with a blind hole for installing the thrust sensor.
Preferably, the lower fixing support plate is further provided with counter bores uniformly arranged along the circumferential direction of the blind hole, and the counter bores are used for being fixed with the mounting foundation through counter bolts.
Compared with the introduction content of the background technology, the cold air engine thrust measuring device comprises a fixed frame assembly and a movable frame assembly arranged on the fixed frame assembly, wherein a thrust sensor is arranged on the fixed frame assembly, and a first connecting position used for being connected with the front end of a thrust chamber of the cold air engine is arranged at the top of the thrust sensor; the movable frame assembly is in sliding fit with the fixed frame assembly along the vertical direction, a second connecting position used for being connected with the air injection end of the thrust chamber is arranged on the movable frame assembly, and the second connecting position and the first connecting position are arranged in a right-to-right mode in the vertical direction. In the practical application process, the front end of a thrust chamber of the cold air engine is fixed with a first connecting position at the top of a thrust sensor, the air injection end of the thrust chamber is fixed with a second connecting position on a movable frame component, then the air injection end of the thrust chamber is blocked and air is supplied to the thrust chamber, the tightness of the system is checked when the air supply pressure is adjusted to the rated working pressure, since the first connecting position and the second connecting position are opposite to each other in the vertical direction, the measuring reference of the thrust sensor is set to zero at the moment, can eliminate the deviation generated by the action of gravity and internal pressure, then discharge the gas and remove the blockage of the gas injection end, finally according to the preset pressure, high-pressure gas is supplied to the thrust chamber through the gas supply system, the high-pressure gas is upwards discharged at a high speed after being expanded by the thrust chamber to generate downward thrust, and the thrust sensor outputs a measurement signal to the acquisition equipment. This air conditioning engine thrust measuring device, the effectual interference to the measuring result of having avoided gravity and self internal pressure has eliminated thrust measuring error, has promoted the accuracy of measuring result greatly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an overall structure of a device for measuring thrust of a cold air engine according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an upper fixing support plate according to an embodiment of the present invention;
FIG. 3 is a schematic sectional view A-A of FIG. 2;
fig. 4 is a schematic structural view of a lower fixing support plate according to an embodiment of the present invention;
FIG. 5 is a schematic sectional view of the structure of FIG. 4B-B;
fig. 6 is a schematic structural diagram of a movable frame assembly according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of C-C of FIG. 6.
In the above figures 1-7 of the drawings,
the device comprises a fixed frame component 1, a lower fixed support plate 11, a blind hole 11a, a counter bore 11b, a slide rail 12, an upper fixed support plate 13, a movable frame component 2, a slide support plate 21, a central circular plate 21a, a sub support plate 21b, a hollow hole 21c, a through hole 21d, a slide block 22, a thrust sensor 3 and a thrust chamber 4.
Detailed Description
The core of the utility model is to provide a cool air engine thrust measuring device to solve cool air engine thrust measuring device's thrust measuring error great cause the unsafe problem of measuring result.
In order to make those skilled in the art better understand the technical solution provided by the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated position or element must have a specific orientation, be constituted in a specific orientation, and be operated, and thus, are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-7, an embodiment of the present invention provides a device for measuring a thrust of a cooling air engine, including a fixed frame assembly 1 and a movable frame assembly 2 disposed on the fixed frame assembly 1, wherein a thrust sensor 3 is disposed on the fixed frame assembly 1, and a first connection position for connecting with a front end of a thrust chamber 4 of the cooling air engine is disposed at a top of the thrust sensor 3; the movable frame assembly 2 is in sliding fit with the fixed frame assembly 1 along the vertical direction, a second connecting position used for being connected with the air injection end of the thrust chamber 4 is arranged on the movable frame assembly 2, and the second connecting position and the first connecting position are arranged in a right-to-right mode in the vertical direction.
In the practical application process, the front end of a thrust chamber of the cold air engine is fixed with a first connecting position at the top of a thrust sensor, the air injection end of the thrust chamber is fixed with a second connecting position on a movable frame component, then the air injection end of the thrust chamber is blocked and air is supplied to the thrust chamber, the tightness of the system is checked when the air supply pressure is adjusted to the rated working pressure, since the first connecting position and the second connecting position are opposite to each other in the vertical direction, the measuring reference of the thrust sensor is set to zero at the moment, can eliminate the deviation generated by the action of gravity and internal pressure, then discharge the gas and remove the blockage of the gas injection end, finally according to the preset pressure, high-pressure gas is supplied to the thrust chamber through the gas supply system, the high-pressure gas is upwards discharged at a high speed after being expanded by the thrust chamber to generate downward thrust, and the thrust sensor outputs a measurement signal to the acquisition equipment. This air conditioning engine thrust measuring device, the effectual interference to the measuring result of having avoided gravity and self internal pressure has eliminated thrust measuring error, has promoted the accuracy of measuring result greatly.
In some specific embodiments, the specific structure of the fixed frame assembly 1 may include a lower fixed support plate 11 and a slide rail 12 disposed on the lower fixed support plate 11 and arranged in a vertical direction, and the thrust sensor 3 is disposed on the lower fixed support plate 11; the movable frame assembly 2 comprises a sliding support plate 21 and a slide block 22 which is arranged on the sliding support plate 21 and is in sliding fit with the slide rail 12, and the second connecting position is arranged on the sliding support plate 21. The sliding fit between the fixed frame assembly and the movable frame assembly is realized through the sliding block and the sliding rail. It can be understood that, the above-mentioned fixed frame assembly is provided with the slide rail, and the manner of providing the slide block on the movable frame assembly is only a preferred example of the embodiment of the present invention, and in the practical application process, the slide block may be provided on the fixed frame assembly, and the manner of providing the slide rail on the movable frame assembly is only the slide block is fixed, and the slide rail moves.
In some more specific embodiments, the specific structural form of the sliding rail 12 may be positioning rods disposed on the lower fixing support plate 11, and the positioning rods are uniformly arranged along the circumferential direction of the lower fixing support plate 11; the sliding block 22 may be a sliding sleeve sleeved on the positioning rod. The sliding fit is realized by matching the positioning rods arranged in the circumferential direction with the sliding sleeves, so that the movable frame assembly slides more stably relative to the fixed frame assembly, and the occurrence of transverse movement is avoided. It can be understood of course that the above-mentioned locating lever and sliding sleeve's sliding mode is only the preferred example of the embodiment of the present invention to sliding fit's structure, and in the practical application process, can also adopt other interactive fit's structural style that technical staff in the art commonly used, for example, be provided with the spout that sets up perpendicularly on the fixed extension board down, the quantity of this spout is a plurality of, and the opening of spout is towards the center of fixed extension board down, is provided with on the movable frame subassembly with spout one-to-one and sliding fit's slider. In the practical application process, the selection can be performed according to the practical requirements, and is not limited in more detail here.
In a further embodiment, in order to reduce the overall weight of the moving frame assembly as much as possible, the sliding support plate 21 may include a central circular plate 21a and a plurality of sub-support plates 21b extending radially outward from the outer edge of the central circular plate 21a, wherein a through hole 21d for passing through the gas flow at the gas injection end is formed in the middle of the central circular plate 21 a; the sub support plates 21b correspond to the positioning rods one by one, and the sliding sleeves are arranged at the tail ends of the sub support plates 21 b. Through designing into above-mentioned structural style with the movable frame subassembly, compare in the structure of monoblock panel, weight is lighter more.
In a further embodiment, in order to further reduce the overall weight of the moving frame assembly, a plurality of through holes 21c may be further provided on the central circular plate 21a, and the through holes 21c are uniformly arranged along the circumferential direction of the through hole 21 d. Through the mode that fretwork hole circumference was evenly arranged, on the other hand can guarantee that central plectane is when the atress, and the atress of each position is more balanced in circumference through the fretwork hole on the one hand can alleviate whole weight.
In some specific embodiments, in order to make the measurement result more accurate and avoid the sliding friction from affecting the measurement result, the sliding sleeve may be designed into a linear bearing structure. Through the arrangement of the linear bearing, the friction coefficient can be effectively reduced, the friction resistance is reduced, and then the accuracy of a thrust measurement result is improved.
In a further embodiment, in order to ensure the stability of the whole fixed frame assembly and the stability of the positioning rod, the fixed frame assembly 1 may further include an upper fixed support plate 13 disposed opposite to the lower fixed support plate 11, and the top end of the positioning rod is fixedly connected to the upper fixed support plate 13. Through fixing the extension board from top to bottom and fixing the locating lever simultaneously, can effectually promote the stability in position of locating lever, avoided the locating lever to appear rocking the problem that influences the measuring result.
In a further embodiment, the upper fixing stay 13 is preferably of a generally circular ring structure in order to more effectively reduce the weight of the entire thrust measuring device. It is understood that the above-mentioned form of the circular ring structure is only a preferred example of the structure of the upper fixing plate according to the embodiment of the present invention, and in the practical application, other structural forms commonly used by those skilled in the art, such as a structure of a hollowed-out plate, etc., may also be used.
In some specific embodiments, in order to facilitate the installation of the thrust sensor, the middle portion of the lower fixing plate 11 may be provided with a blind hole 11a for installing the thrust sensor 3. The thrust sensor is embedded in the blind hole. It should be noted here that the size of the blind hole is generally slightly larger than the circumferential size of the thrust sensor, so that the thrust sensor can be just inserted.
In a further embodiment, in order to facilitate fixing of the fixed frame assembly, the lower fixed support plate 11 is further provided with counterbores 11b uniformly arranged along the circumferential direction of the blind hole 11a, and the counterbores 11b are used for being fixed with a mounting base through countersunk bolts. The counter bore is arranged to be connected with the installation foundation, so that the top of the lower fixed support plate can be prevented from exposing a bolt, and the smoothness of the surface of the lower fixed support plate is guaranteed.
For better understanding of the technical solution of the present invention, the following is specifically described in connection with the installation process of the preferred solution:
the fixed frame assembly 1 comprises a lower fixed support plate 11, an upper fixed support plate 13 and a positioning rod, and is mainly used for mounting and supporting other parts and transmitting thrust to a mounting base. The lower fixing support plate 11 is provided with 4-8 countersunk through holes, the lower fixing support plate is fixed with a foundation through 4-8 screws with the specification of M8 multiplied by 20, the foundation can be a working platform or a simple support, and the installation plane is as horizontal as possible. The lower fixing stay 11 is provided with a threaded blind hole of M8, and a headless screw of M8 × 12 standard is first screwed into the threaded blind hole and manually tightened. The diameter of the positioning rod is 16mm, the length of the positioning rod is about 300mm, M8 threaded holes are processed at two ends of the positioning rod, any one end of the 3 positioning rods is connected with a headless screw, and the positioning rods are screwed up manually. The upper fixing support plate 13 is of a circular ring structure, three step through holes are uniformly distributed along the circumference, and the step through holes are characterized in that two ends of each step through hole are large, a middle hole is small, the aperture of the middle hole is 9mm, the aperture of a large hole at the lower side is 16mm, and the aperture of a large hole at the upper side is 14 mm. The upper fixing support plate 13 is placed on the upper part of the positioning rod, 3 positioning rods are respectively inserted into 3 holes with the diameter of 16mm, and are fastened by using socket head cap screws with the specification of GB/T70M 8 multiplied by 12, and the tightening torque is 15-20 N.m.
The movable frame assembly comprises a sliding support plate 21 and a linear bearing 23. The sliding support plate 21 and the linear bearing 23 are connected through a socket head cap screw with the specification of GB/T70M 4 x 10. 3 locating rods respectively pass through 3 slide bearings 23, and the slide support plate 21 can freely move up and down along the locating rods.
The working process of the measurement is as follows:
before the test, the cold air engine and the thrust sensor 3 were connected by 4 socket head cap screws of GB/T70M 8X 12 specification, then connected with the sliding support plate 21 by the socket head cap screws of GB/T70M 8X 12 specification, and the bottom of the sensor was contacted with the lower fixing support plate 11.
The air supply hose is connected to the inlet of a thrust chamber of the cold air engine, an airtight plug cover is installed from the central hole of the sliding support plate 21, the air supply pressure is adjusted to the rated working pressure, the tightness of the system is checked, and the measuring reference of the thrust sensor is set to zero, so that the action deviation of gravity and internal pressure can be eliminated. Then the gas is discharged and the airtight closure is disassembled.
According to the preset pressure, the gas supply system supplies high-pressure gas to the thrust chamber, the high-pressure gas is upwards discharged at a high speed after being expanded by the thrust chamber to generate downward thrust, and the thrust sensor outputs a measurement signal to the acquisition equipment.
It should be noted that the above fixing manner and the specifications and number of the fasteners are only preferred examples given for the types of thrust chambers in common use, and the fixing manner and the number of the fasteners can be configured according to actual requirements in practical application. In addition, the thrust measuring device can adapt to a cold air propulsion engine with any thrust range by changing the installation interface of the movable frame and the thrust chamber and replacing the thrust sensor with the matched range, and the embodiment is mainly suitable for the cold air propulsion engine with the thrust range of 5-500N.
It is right above that the utility model provides a cool air engine thrust measuring device has carried out the detailed introduction. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. A cool air engine thrust measuring device is characterized by comprising a fixed frame assembly (1) and a movable frame assembly (2) arranged on the fixed frame assembly (1), wherein a thrust sensor (3) is arranged on the fixed frame assembly (1), and the top of the thrust sensor (3) is provided with a first connecting position used for being connected with the front end of a thrust chamber (4) of a cool air engine; the movable frame assembly (2) is in sliding fit with the fixed frame assembly (1) along the vertical direction, a second connecting position used for being connected with the air injection end of the thrust chamber (4) is arranged on the movable frame assembly (2), and the second connecting position and the first connecting position are arranged in the vertical direction in a right-to-vertical mode.
2. A cool-air engine thrust measuring device according to claim 1, characterized in that the stationary frame assembly (1) includes a lower fixed stay (11) and slide rails (12) provided on the lower fixed stay (11) and arranged in a vertical direction, the thrust sensor (3) being provided on the lower fixed stay (11); the movable frame assembly (2) comprises a sliding support plate (21) and a sliding block (22) which is arranged on the sliding support plate (21) and is in sliding fit with the sliding rail (12), and the second connecting position is arranged on the sliding support plate (21).
3. A cool-air engine thrust measuring device according to claim 2, characterized in that the slide rails (12) are positioning rods provided on the lower stationary bracket (11), the positioning rods being arranged uniformly in the circumferential direction of the lower stationary bracket (11); the sliding block (22) is a sliding sleeve sleeved on the positioning rod.
4. A cold-air engine thrust measuring device according to claim 3, wherein the sliding stay (21) includes a central circular plate (21a) and a plurality of sub stays (21b) extending radially outward from an outer edge of the central circular plate (21a), and a central portion of the central circular plate (21a) is provided with a through hole (21d) for the air flow passing through of the air jet end; the sub support plates (21b) correspond to the positioning rods one by one, and the sliding sleeves are arranged at the tail ends of the sub support plates (21 b).
5. A cold-air engine thrust measuring device according to claim 4, characterized in that a plurality of hollowed holes (21c) are provided on the central circular plate (21a), said hollowed holes (21c) being arranged uniformly in the circumferential direction of the through hole (21 d).
6. A cold-air engine thrust measuring device according to claim 3, wherein said sliding sleeve is a linear bearing.
7. A cool-air engine thrust measuring device according to claim 3, characterized in that the stationary frame assembly (1) further includes an upper fixing plate (13) disposed opposite to the lower fixing plate (11), and the top end of the positioning rod is fixedly connected to the upper fixing plate (13).
8. A cold-air engine thrust measuring device according to claim 7, characterized in that the upper fixing plate (13) is of a circular ring-shaped configuration.
9. A cold-air engine thrust measuring device according to any of claims 2-8, characterized in that the lower fixing plate (11) is provided with a blind hole (11a) in the middle for mounting the thrust sensor (3).
10. The cold-air engine thrust measuring device according to claim 9, wherein the lower fixing support plate (11) is further provided with counter bores (11b) uniformly arranged along the circumferential direction of the blind hole (11a), and the counter bores (11b) are used for being fixed with a mounting base through counter bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021140660.7U CN212710049U (en) | 2020-06-17 | 2020-06-17 | Thrust measuring device of air-conditioning engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021140660.7U CN212710049U (en) | 2020-06-17 | 2020-06-17 | Thrust measuring device of air-conditioning engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212710049U true CN212710049U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021140660.7U Active CN212710049U (en) | 2020-06-17 | 2020-06-17 | Thrust measuring device of air-conditioning engine |
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| Country | Link |
|---|---|
| CN (1) | CN212710049U (en) |
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2020
- 2020-06-17 CN CN202021140660.7U patent/CN212710049U/en active Active
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