CN214997952U

CN214997952U - Horizontal test bed of check weighing and equipment of taking a trial run

Info

Publication number: CN214997952U
Application number: CN202121596171.7U
Authority: CN
Inventors: 尚子尧
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-12-03
Anticipated expiration: 2031-07-14

Abstract

The application provides a horizontal test bed of check weighing and test equipment relates to rocket engine and measures technical field. The weight-measuring horizontal test bed comprises a test bed bottom plate and a weight measuring device supported at the bottom of the test bed bottom plate; the weight measuring device comprises a base, a force measuring sensor and a connecting structure, wherein the force measuring sensor is arranged on the base, the connecting structure is arranged between the test bed bottom plate and the force measuring sensor, and the connecting structure is respectively connected with the test bed bottom plate and the force measuring sensor. In the hot test run process of the weight-measuring horizontal test bed, the weight of the rocket engine is monitored in real time through the force-measuring sensor supported in the weight measuring device at the bottom of the bottom plate of the test bed, so that the real-time data of the weight change of the propellant in the rocket engine are indirectly acquired, the burning speed is accurately calculated, and the specific impulse data of the rocket engine are accurately calculated.

Description

Horizontal test bed of check weighing and equipment of taking a trial run

Technical Field

The application relates to the technical field of rocket engine measurement, in particular to a weight-measuring horizontal test bed and test equipment.

Background

In the ground test of the rocket engine, a test run device is usually used, and the ground hot test run can be carried out on the rocket engine through the test run device so as to obtain important data such as the thrust of the rocket engine.

In the case of solid or solid-liquid rocket engines, the propellant inside is consumed continuously during the test run. However, the existing test run equipment cannot effectively monitor the weight change of the propellant in the rocket engine in real time when the hot test run is carried out. The propellant in the rocket engine can only be weighed before and after the hot test run, and the specific impulse data of the rocket engine can be obtained by estimating the burning speed, so that the obtained specific impulse data has larger errors.

SUMMERY OF THE UTILITY MODEL

For overcoming the not enough among the prior art, this application provides a horizontal test bed of check weighing and test equipment for solve the problem that exists among the prior art.

In order to achieve the above object, in a first aspect, the present application provides a horizontal test bed for measuring weight, which includes a test bed bottom plate and a weight measuring device supported at the bottom of the test bed bottom plate;

the weight measuring device comprises a base, a force measuring sensor and a connecting structure, wherein the force measuring sensor is arranged on the base, the connecting structure is arranged between the test bed bottom plate and the force measuring sensor, and the connecting structure is respectively connected with the test bed bottom plate and the force measuring sensor.

With reference to the first aspect, in one possible implementation manner, the connecting structure includes a connecting plate, a weighing adjusting assembly and a support adjusting assembly;

the connecting plate is connected with the test bed bottom plate;

the weighing adjusting component is arranged on the connecting plate, and one end, far away from the connecting plate, of the weighing adjusting component is connected with the force measuring sensor;

the supporting and adjusting assembly is arranged on the connecting plate, and one end, far away from the connecting plate, of the supporting and adjusting assembly is connected with the base;

the weighing adjusting assembly is matched with the supporting adjusting assembly and used for enabling the weight of the test bed bottom plate to selectively act on the load cell or the base.

With reference to the first aspect, in one possible implementation, the weighing adjustment assembly includes a first carrier bar and a first adjustment nut;

one end of the first bearing rod is arranged on the force measuring sensor, and the other end of the first bearing rod movably penetrates through the connecting plate;

the first adjusting nut is arranged on the first bearing rod and between the connecting plate and the force measuring sensor, the first adjusting nut is in threaded fit with the first bearing rod, and the first adjusting nut is used for abutting against the connecting plate.

With reference to the first aspect, in a possible implementation manner, the weighing adjustment assembly further includes a first connection seat, one end of the first connection seat is connected to the load cell, and the other end of the first connection seat is in threaded fit with the first load bar.

With reference to the first aspect, in a possible implementation manner, the weighing adjustment assembly further includes a first limiting boss, the first limiting boss is disposed at an end of the first bearing rod away from the load cell, and the first limiting boss and the connecting plate are in abutting fit.

With reference to the first aspect, in one possible implementation, the support adjustment assembly includes a second carrier bar and a second adjustment nut;

one end of the second bearing rod is arranged on the base, the other end of the second bearing rod penetrates through the connecting plate, and the second bearing rod is in sliding fit with the connecting plate;

the second adjusting nut is arranged on the second bearing rod and between the connecting plate and the base, is in threaded fit with the second bearing rod and is used for abutting against the connecting plate.

With reference to the first aspect, in a possible implementation manner, the support adjusting assembly further includes a second connecting seat, one end of the second connecting seat is connected with the base, and the other end of the second connecting seat is in threaded fit with the second bearing rod.

With reference to the first aspect, in a possible implementation manner, the support adjusting assembly further includes a second limiting boss, the second limiting boss is disposed at an end of the second carrying rod away from the base, and the second limiting boss and the connecting plate are in abutting fit.

With reference to the first aspect, in one possible implementation, the load cell is a load cell or a pressure sensor.

In a second aspect, the present application further provides a test run device for hot test run of a rocket engine, wherein the test run device comprises a thrust frame, a thrust sensor, a controller and the weight-measuring horizontal test run table provided in the first aspect;

the thrust frame is arranged on the bottom plate of the test bed;

the thrust sensor is positioned on one side of the test bed bottom plate;

the controller is respectively connected with the thrust sensor and the force measuring sensor and is used for acquiring real-time data measured by the thrust sensor and the force measuring sensor.

Compare in prior art, the beneficial effect of this application:

the application provides a weight-measuring horizontal test bed and test equipment, wherein the weight-measuring horizontal test bed comprises a test bed bottom plate and a weight measuring device supported at the bottom of the test bed bottom plate; the weight measuring device comprises a base, a force measuring sensor and a connecting structure, wherein the force measuring sensor is arranged on the base, the connecting structure is arranged between the test bed bottom plate and the force measuring sensor, and the connecting structure is respectively connected with the test bed bottom plate and the force measuring sensor. The application provides a horizontal test bed of check weighing, test bed bottom plate is used for bearing the rocket engine of waiting for the hot test, and the in-process of hot test is carried out real-time supervision to the weight of rocket engine through the force cell that supports in the weight measuring device of test bed bottom plate bottom, and then indirectly obtains the real-time data of the weight change of the inside propellant of rocket engine, and the speed of burning is fired in accurate calculation to the specific impulse data of rocket engine is calculated to the accuracy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 shows a schematic structural diagram of a commissioning device provided in an embodiment of the present application;

fig. 2 shows a schematic perspective structure diagram of a weight-measuring horizontal test bed provided in an embodiment of the present application;

FIG. 3 is a schematic perspective view of the weight measuring device in the horizontal test bed for measuring weight shown in FIG. 2;

FIG. 4 shows an exploded schematic view of the weight measuring device of FIG. 3;

FIG. 5 is a front view of the weight-measuring device of FIG. 3 in a first state;

fig. 6 is a front view showing a second state of the weight-measuring device shown in fig. 3.

Description of the main element symbols:

100-weight measuring horizontal test bed; 110-test bed floor; 120-a weight measuring device; 121-a base; 1210-mounting holes; 1211-positioning groove; 122-a load cell; 1220-positioning boss; 123-a linking structure; 1230-connecting plate; 1230 a-first via; 1230b — second via; 1231-a weight adjustment assembly; 1231 a-first connection; 1231 b-a first carrier bar; 1231 c-a first limit boss; 1231d — first adjusting nut; 1232-a support adjustment assembly; 1232 a-second connection holder; 1232 b-a second carrier bar; 1232 c-a second limit boss; 1232d — second adjusting nut; 200-a thrust frame; 300-a thrust sensor; 400-rocket engine.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

There are two common rocket engines 400 at present, namely a solid rocket engine and a solid-liquid rocket engine.

In the existing test run equipment, the weight change of a propellant in the solid rocket engine cannot be monitored in the hot test run process of the solid rocket engine, and further the specific impulse change in the hot test run process cannot be monitored, so that the burning speed experiment of the propellant is needed to speculate and calculate the specific impulse of the solid rocket engine.

In the existing test run equipment, the solid-liquid rocket engine cannot monitor the weight change of the solid propellant in the hot test run process, further cannot monitor the specific impulse change in the hot test run process, cannot perform the burning rate test, can only weigh the propellant after the hot test run is finished and estimate the burning rate, and the obtained result has poor accuracy and large error.

Referring to fig. 1 to 3, in order to accurately obtain the specific impulse data of the rocket engine 400 during the hot test, the present embodiment provides a weight-measuring horizontal test bed 100, which is applied to the test equipment of the rocket engine 400, wherein the weight-measuring horizontal test bed 100 is used for carrying the rocket engine 400.

Referring to fig. 1 and fig. 2, the horizontal test bed 100 for measuring weight provided in the present embodiment includes a test bed bottom plate 110 and a weight measuring device 120 supported at the bottom of the test bed bottom plate 110, that is, the weight measuring device 120 is located below the test bed bottom plate 110, and the test bed bottom plate 110 can be supported on a foundation or a base platform through the weight measuring device 120. When the hot test of the rocket motor 400 is performed, the rocket motor 400 is placed on the test bed base 110.

The number of the weight measuring devices 120 may be plural, and the plural weight measuring devices 120 are distributed on the bottom of the test bed bottom plate 110. Optionally, a plurality of weight measuring devices 120 are uniformly distributed at the bottom of the test bed bottom plate 110 to stably support the test bed bottom plate 110, so as to more accurately obtain the weight change of the rocket engine 400 on the test bed bottom plate 110.

In this embodiment, the number of the weight measuring devices 120 is four, and the four weight measuring devices 120 are distributed at four corners of the test bed bottom plate 110, so as to support the test bed bottom plate 110. Of course, in some embodiments, the number of weight measuring devices 120 may also be set to three, five, six, or other numbers. It should be understood that the foregoing is illustrative only and is not intended to limit the scope of the invention.

Referring to fig. 2 and 3, in order to more clearly describe the structural scheme of the weight measuring device 120 in the present embodiment, one of four weight measuring devices 120 is described below.

The weight measuring device 120 includes a base 121, a load cell 122, and a connecting structure 123. Wherein, the base 121 is provided with a mounting hole 1210 to facilitate the mounting and fixing of the base 121. The load cell 122 is disposed on the base 121, and the connecting structure 123 is disposed between the test bed bottom plate 110 and the load cell 122.

Further, the load cell 122 is disposed at a central position of the base 121, and a positioning lug (not shown) is disposed on the base 121, and the positioning lug is connected to a mounting lug (not shown) on the load cell 122 through a bolt, so as to facilitate detachment and installation of the load cell 122.

Alternatively, the load cell 122 is a load cell or a pressure cell, both of which can measure the weight change of the rocket motor 400 on the test bed bottom plate 110 in real time. It should be understood that the foregoing is illustrative only and is not intended to limit the scope of the invention.

The connecting structure 123 is connected to the test bed base plate 110 and the load cell 122, respectively. Optionally, the connecting structure 123 is detachably connected or welded to the test bed bottom plate 110 and the load cell 122, respectively.

In this embodiment, the connecting structure 123 is detachably connected to the test bed bottom plate 110 and the load cell 122, respectively, so as to facilitate the assembly, disassembly and maintenance of the whole weight measuring device 120.

When the horizontal test bed 100 for weight measurement provided by this embodiment performs a hot test of the rocket engine 400, the test bed bottom plate 110 is used for carrying the rocket engine 400 to be subjected to the hot test. In the hot test run process, the weight of the rocket engine 400 is monitored in real time through the force measuring sensor 122 in the weight measuring device 120 supported at the bottom of the test bed bottom plate 110, so that the real-time data of the weight change of the propellant in the rocket engine 400 is indirectly acquired, the burning rate is accurately calculated, the specific impulse data of the rocket engine 400 is finally and accurately calculated, the measurement and calculation errors are greatly reduced, and the working efficiency is further improved.

Example two

Referring to fig. 2 to 6, the present embodiment provides a weight-measuring horizontal test bed 100 applied to a hot test device of a rocket engine 400. The present embodiment is an improvement on the technology of the first embodiment, and compared with the first embodiment, the difference is that:

referring to fig. 2, 3 and 4, in the present embodiment, the connecting structure 123 includes a connecting plate 1230, a weighing adjusting assembly 1231 and two supporting adjusting assemblies 1232.

The connecting plate 1230 is concave, the two ends of the connecting plate 1230 with the concave structure are higher than the middle part, and the two ends of the connecting plate 1230 can be connected with the test bed bottom plate 110 through bolts. The weigh adjusting assembly 1231 and the two support adjusting assemblies 1232 are both disposed at the middle of the attachment plate 1230, and the attachment plate 1230 of the "concave" structure provides a sufficiently large installation and movement space for the weigh adjusting assembly 1231 and the two support adjusting assemblies 1232.

The weighing adjusting assembly 1231 is arranged on the connecting plate 1230, and one end of the weighing adjusting assembly 1231, which is far away from the connecting plate 1230, is connected with the load cell 122. The support adjusting assembly 1232 is disposed on the connecting plate 1230, and one end of the support adjusting assembly 1232 away from the connecting plate 1230 is connected to the base 121. Wherein, through adjusting the weighing adjusting assembly 1231 and the supporting adjusting assembly 1232, the weight of the test bed bottom plate 110 can be selectively acted on the load cell 122 or the base 121. It can be understood that when the weight of the test bed base plate 110 acts on the load cell 122, the load cell 122 can measure the weight change of the test bed base plate 110 and the rocket motor 400 in real time; when the weight of the test bed base plate 110 acts on the base 121, the load cell 122 does not participate in the work even if the rocket motor 400 is mounted on the test bed base plate 110 or if there is a weight change.

Referring to fig. 3 and 4, the weight adjusting assembly 1231 includes a first connecting seat 1231a, a first supporting rod 1231b, a first limiting boss 1231c and a first adjusting nut 1231 d.

The middle portion of the load cell 122 is provided with a positioning boss 1220 protruding upward, the first connecting seat 1231a is disposed on the load cell 122, and one end of the first connecting seat 1231a facing the load cell 122 is provided with a positioning hole (not shown), which is matched with the positioning boss 1220 to realize positioning of the first connecting seat 1231 a.

Further, one end of the first connecting seat 1231a, which is away from the load cell 122, is provided with a threaded hole, the first bearing rod 1231b is provided with an external thread, one end of the first bearing rod 1231b is disposed in the threaded hole of the first connecting seat 1231a, and is in threaded fit with the first connecting seat 1231a, so that by rotating the first bearing rod 1231b, the length of the first bearing rod 1231b, which extends out of the first connecting seat 1231a, can be adjusted. The other end of the first bearing rod 1231b penetrates through the connecting plate 1230, the connecting plate 1230 is correspondingly provided with a first through hole 1230a allowing the first bearing rod 1231b to pass through, and the first through hole 1230a and the first bearing rod 1231b are in clearance fit, so that the sliding fit between the first bearing rod 1231b and the connecting plate 1230 is realized.

The first limiting boss 1231c is disposed at an end of the first bearing rod 1231b away from the load cell 122, and the first limiting boss 1231c is in abutting fit with the connecting plate 1230, i.e., the first limiting boss 1231c limits the first bearing rod 1231b to slide out of the first through hole 1230a of the connecting plate 1230.

Optionally, the first limiting boss 1231c is cylindrical, prismatic or other shape, and the maximum width dimension of the first limiting boss 1231c is greater than the diameter of the first through hole 1230a to limit the first bearing rod 1231b from sliding out of the first through hole 1230a of the connection plate 1230.

The first adjusting nut 1231d is disposed on the first bearing rod 1231b, and the first adjusting nut 1231d is located between the connecting plate 1230 and the load cell 122, and the first adjusting nut 1231d is in threaded engagement with the first bearing rod 1231 b. Thus, by rotating the first adjustment nut 1231d, the first adjustment nut 1231d can be moved in the axial direction of the first carrier rod 1231 b.

The maximum width dimension of the first adjusting nut 1231d is greater than the diameter of the first through hole 1230a, so that when the first adjusting nut 1231d moves upward along the axial direction of the first bearing rod 1231b, the first adjusting nut 1231d can abut against the connecting plate 1230.

In some embodiments, bolts may be used instead of the first carrier bar 1231b and the first limiting boss 1231 c.

Referring to fig. 3 and 4, two support adjustment assemblies 1232 are provided, and the two support adjustment assemblies 1232 are both disposed on the base 121 and are symmetrical with respect to the axis of the first carrying rod 1231 b. Of course, in some embodiments, the support adjustment assemblies 1232 may be provided in three, four, or other numbers, and the support adjustment assemblies 1232 are evenly distributed around the axis of the first carrier rod 1231 b. It should be understood that the foregoing is illustrative only and is not intended to limit the scope of the invention.

In this embodiment, a description is given of an alternative of the two supporting and adjusting assemblies 1232, specifically, the supporting and adjusting assembly 1232 includes a second connecting seat 1232a, a second bearing rod 1232b, a second limiting boss 1232c and a second adjusting nut 1232 d.

The base 121 is provided with a positioning groove 1211, the second connecting seat 1232a is disposed in the positioning groove 1211, and the positioning groove 1211 enables the second connecting seat 1232a to be quickly positioned and installed. Optionally, second connecting seat 1232a and base 121 may be welded together to improve the stability of installation.

Further, one end of the second connecting seat 1232a, which is away from the base 121, is also provided with a threaded hole, the second bearing rod 1232b is provided with an external thread, one end of the second bearing rod 1232b is disposed in the threaded hole of the second connecting seat 1232a, and is in threaded fit with the second connecting seat 1232a, so that the height of the second bearing rod 1232b can be adjusted by rotating the second bearing rod 1232 b. The other end of the second bearing rod 1232b penetrates through the connecting plate 1230, the connecting plate 1230 is correspondingly provided with a second through hole 1230b allowing the second bearing rod 1232b to pass through, and the second through hole 1230b is in clearance fit with the second bearing rod 1232b, so that the sliding fit between the second bearing rod 1232b and the connecting plate 1230 is realized.

The second limiting boss 1232c is disposed at an end of the second carrying rod 1232b away from the base 121, and the second limiting boss 1232c is in abutting fit with the connecting plate 1230, i.e., the second limiting boss 1232c can limit the second carrying rod 1232b to slide out of the second through hole 1230b of the connecting plate 1230.

Optionally, the second limiting boss 1232c is cylindrical, prismatic or other shape, and the maximum width dimension of the second limiting boss 1232c is greater than the diameter of the second through hole 1230b to limit the second loading rod 1232b from sliding out of the second through hole 1230b of the connection plate 1230.

The second adjusting nut 1232d is disposed on the second bearing rod 1232b, the second adjusting nut 1232d is located between the connecting plate 1230 and the base 121, and the second adjusting nut 1232d is in threaded engagement with the second bearing rod 1232 b. Therefore, by rotating the second adjustment nut 1232d, the second adjustment nut 1232d can be moved in the axial direction of the second carrier rod 1232 b.

The maximum width dimension of the second adjusting nut 1232d is greater than the diameter of the second through hole 1230b, so that the second adjusting nut 1232d can abut against the connecting plate 1230 when the second adjusting nut 1232d moves upward along the axial direction of the second bearing rod 1232 b. In some embodiments, bolts may be used instead of the second carrier bar 1232b and the second limiting boss 1232 c.

The horizontal test bed 100 of the present embodiment for measuring weight, wherein, the adjustment principle of the adjusting assembly 1231 and the adjusting assembly 1232 for supporting is as follows:

referring to fig. 2 and 5, in the working state of the horizontal test bed 100, the weight of the test bed base plate 110 acts on the load cell 122.

The first step is as follows: rotating the first adjusting nut 1231d on the first bearing rod 1231b to make the first adjusting nut 1231d move upward along the axial direction of the first bearing rod 1231b, so that the first adjusting nut 1231d abuts against the connecting plate 1230, and at this time, the first adjusting nut 1231d is located at the first height position;

the second step is that: then, the second adjusting nut 1232d on the second carrier rod 1232b is rotated to move the second adjusting nut 1232d downward along the axial direction of the second carrier rod 1232b, so that the second adjusting nut 1232d is released from the abutment with the connecting plate 1230, and at this time, the second adjusting nut 1232d is located at the second height position.

The first height position is higher than the second height position, and the connecting plate 1230 only abuts against the first adjusting nut 1231d, and the second adjusting nut 1232d on the second bearing rod 1232b is not stressed. Since the first support rod 1231b is connected to the load cell 122 through the first connecting seat 1231a, the weight of the test bed bottom plate 110 directly acts on the load cell 122 through the first support rod 1231 b.

Referring to fig. 2 and 6, when the horizontal test bed 100 for weight measurement (ii) is not in a working state, the weight of the bottom plate 110 of the test bed acts on the base 121.

The first step is as follows: counter-rotating the second adjusting nut 1232d on the second carrier rod 1232b such that the second adjusting nut 1232d moves axially and upwardly along the second carrier rod 1232b such that the second adjusting nut 1232d abuts the attachment plate 1230;

the second step is that: the first adjusting nut 1231d on the first bearing rod 1231b is rotated reversely, so that the first adjusting nut 1231d moves downward along the axial direction of the first bearing rod 1231b, and the first adjusting nut 1231d is released from the abutment with the connecting plate 1230, at this time, the first adjusting nut 1231d is not stressed, and the weight of the test bed bottom plate 110 directly acts on the base 121 through the second bearing rod 1232 b.

According to the horizontal test bed 100 for measuring weight provided by the embodiment, by adjusting the weighing adjusting assembly 1231 and the supporting adjusting assembly 1232, the weight of the test bed bottom plate 110 can selectively act on the load cell 122 or the base 121, so as to prolong the service life of the load cell 122.

EXAMPLE III

Referring to fig. 1 and 2, the present embodiment provides a test run device for hot test run of a rocket engine 400.

The test run equipment provided by the embodiment includes a thrust frame 200, a thrust sensor 300, a controller (not shown), and the weight-measuring horizontal test run table 100 provided by the embodiment one or the embodiment two.

Wherein, the thrust frame 200 is arranged on the test bed bottom plate 110 of the weight-measuring horizontal test bed 100.

The thrust sensor 300 is provided on the base and located on one side of the test bed base plate 110, and when the hot test of the rocket engine 400 is performed, the rocket engine 400 abuts against the thrust sensor 300, and the thrust sensor 300 can measure the thrust of the rocket engine 400 in real time and output a first measurement signal. Meanwhile, in the hot-test process, the load cell 122 may measure the weight change of the rocket engine 400 in real time and output a second measurement signal.

The controller is electrically connected with the thrust sensor 300 and the force measuring sensor 122 respectively, acquires the first measuring signal and the second measuring signal in real time, further can acquire real-time data, namely thrust data and weight data, measured by the thrust sensor 300 and the force measuring sensor 122, and obtains accurate test run data through analysis and calculation of internal software. Wherein the test run data includes the specific impulse of the rocket engine 400.

The test run device provided in this embodiment employs the weight-measuring horizontal test run bed 100 provided in the first embodiment or the second embodiment, and monitors the weight of the rocket engine 400 in real time through the load cell 122, so as to indirectly obtain real-time data of the weight change of the propellant inside the rocket engine 400, accurately calculate the combustion speed, and finally accurately calculate the specific impulse data of the rocket engine 400.

It should be noted that, in the hot test, the area of the test bed bottom plate 110 is large, the force applied to the load cell 122 in each weight measuring device 120 is uniform, and the total weight of the whole system can be obtained by adding the force and the load cell.

The trial run equipment provided by the embodiment is suitable for the condition that the thrust of the rocket engine 400 is not eccentric. That is, in the hot-test, the thrust of the rocket motor 400 is not eccentric, and the thrust direction is along the axial direction of the rocket motor 400, and no vertical component is generated. Therefore, when the solid rocket engine is subjected to thermal test, the load cell 122 can measure the mass change of the whole system; when the solid-liquid rocket engine is subjected to thermal test, although the liquid oxidant is injected into the combustion chamber and the mass change is possibly influenced, the liquid oxidant is injected at the position of the rotating shaft of the engine, the speed is high, the liquid oxidant reacts with the grain, radial force is generated in the combustion chamber and is counteracted with each other, and only axial thrust is generated, so that the influence of the injection of the liquid oxidant on the mass in the solid-liquid rocket engine is small, and the solid-liquid rocket engine can be not considered.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A horizontal test bed for measuring weight is characterized by comprising a test bed bottom plate and a weight measuring device supported at the bottom of the test bed bottom plate;

2. The horizontal test bed of claim 1, wherein the connecting structure comprises a connecting plate, a weighing adjusting assembly and a supporting adjusting assembly;

the connecting plate is connected with the test bed bottom plate;

3. The horizontal test bed of claim 2, wherein the weighing adjustment assembly comprises a first bearing rod and a first adjustment nut;

4. The horizontal test bed of claim 3, wherein the weight adjusting assembly further comprises a first connecting seat, one end of the first connecting seat is connected with the load cell, and the other end of the first connecting seat is in threaded fit with the first bearing rod.

5. The horizontal test bed of claim 3, wherein the weighing adjustment assembly further comprises a first limit boss, the first limit boss is disposed at one end of the first bearing rod away from the load cell, and the first limit boss is in abutting fit with the connecting plate.

6. The horizontal weight-measuring test bed according to claim 2, wherein the support adjusting assembly comprises a second bearing rod and a second adjusting nut;

7. The horizontal weight-measuring test bed according to claim 6, wherein the support adjusting assembly further comprises a second connecting seat, one end of the second connecting seat is connected with the base, and the other end of the second connecting seat is in threaded fit with the second bearing rod.

8. The horizontal weight-measuring test bed according to claim 6, wherein the supporting and adjusting assembly further comprises a second limiting boss, the second limiting boss is arranged at one end of the second bearing rod far away from the base, and the second limiting boss is in abutting fit with the connecting plate.

9. The weight-measuring horizontal test bed according to claim 1, wherein the load cell is a load cell or a pressure sensor.

10. A test run apparatus for hot test run of a rocket engine, the test run apparatus comprising a thrust frame, a thrust sensor, a controller and a weight-measuring horizontal test run bed according to any one of claims 1 to 9;

the thrust frame is arranged on the bottom plate of the test bed;

the thrust sensor is positioned on one side of the test bed bottom plate;