A liquid flow test device for the nozzle of a heavy-lift liquid rocket engine

Abstract

A liquid flow test device for a heavy-lift liquid rocket engine nozzle includes a hoisting plate, a lifting mechanism, a test bench, and a liquid inlet pipeline; after the test piece is connected to the hoisting plate, it is placed on the test bench and lifted and lowered under the control of the lifting mechanism; the liquid inlet pipeline is placed on one side of the test bench and connected to the test piece; the hoisting plate is provided with a group of mounting parts matching the top of the test piece to be tested for connecting with test pieces of different inner diameters; the test bench is provided with a group of reflux holes matching the bottom of test pieces of different inner diameters; the liquid in the liquid inlet pipeline flows through the test piece to be tested and then flows out through the reflux holes. The present invention can be used for tests of hoisting, fixing, collecting liquid discharge, and visually measuring the outflow of cooling channels of nozzles in different structural states, and has strong versatility and convenience.

Description

Technical Field

[0001] The invention relates to a liquid flow test device for a nozzle of a heavy-duty carrier liquid rocket engine, belonging to the technical field of liquid flow testing. Background Art

[0002] The nozzle is the core component of the liquid rocket engine. The flow uniformity and flow resistance characteristics of its cooling channel have a direct impact on the heat transfer efficiency and combustion stability of the rocket engine. Through the visual measurement of the outflow conditions of the nozzle cooling channel during the liquid flow test and the collection of flow and pressure data, the design parameters and process quality can be verified, providing a design basis for the development of various types of engines.

[0003] The new heavy-lift liquid rocket engine nozzle has reached a new level in terms of structure, size and weight. The maximum size is up to 3 meters, the maximum weight is over 600kg, and there are three process states with different structures. The traditional liquid flow test device is only used to fix the engine thrust chamber and other products, and cannot meet the structural dimensions and multi-state high-pressure and large-flow liquid supply test characteristics of the heavy-lift rocket nozzle product. Therefore, it is necessary to design a heavy-lift nozzle liquid flow test device that can meet the requirements of nozzle multi-state and large structural dimensions for hoisting, fixing and testing. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and to provide a liquid flow test device for a heavy-lift liquid rocket engine nozzle, which can be used for the hoisting, fixing, liquid discharge collection, and visual measurement of cooling channel outflow of nozzles in different structural states.

[0005] The technical solution of the present invention is: a liquid flow test device for a heavy-duty liquid rocket engine nozzle, comprising a lifting plate, a lifting mechanism, a test bench, and a liquid inlet pipeline; after the test piece is connected to the lifting plate, it is placed on the test bench and lifted and lowered under the control of the lifting mechanism, the liquid inlet pipeline is placed on one side of the test bench, the liquid inlet pipeline is connected to the test piece to be tested, the lifting plate is provided with a group of mounting parts matching the top of the test piece to be tested, and is used to connect with the test pieces to be tested with different inner diameters, the test bench is provided with a group of reflux holes matching the bottoms of the test pieces to be tested with different inner diameters, and the liquid in the liquid inlet pipeline flows through the test piece to be tested and flows out through the reflux holes.

[0006] In the above-mentioned liquid flow test device, the test bench includes a test base, a support part, and a load-bearing beam; the support part includes a plurality of support columns, the support columns are installed on the edge of the test base, the load-bearing beam is placed above the support columns, and the reflux hole is arranged on the test base.

[0007] In the above-mentioned liquid flow test device, the surface of the hanging plate extends outward to form an end, and is connected to the load-bearing beam through the end.

[0008] In the above-mentioned liquid flow test device, the hanging plate is a circular structure composed of a reinforcing rib group, an arc plate and a long strip plate. The side edges of the two arc plates in the opening direction are respectively connected to the side edges of the long strip plate in the same horizontal plane to form a symmetrical structure, and the two ends of the long strip plate form the end caps.

[0009] In the above-mentioned liquid flow test device, the length m of the end of the hanging plate is 1 / 4 to 1 / 3 of the length of the long strip plate.

[0010] In the above-mentioned liquid flow test device, the group of mounting parts is a group of multiple circles of bolt holes arranged outward from the center of the hanging plate, and the bolt hole group consists of a plurality of threaded holes for mounting and fixing the eye bolts of the test piece to be tested.

[0011] In the above-mentioned liquid flow test device, the reinforcing rib group includes a plurality of long reinforcing ribs and a plurality of short reinforcing ribs, the ends of the long reinforcing ribs are built on the short reinforcing ribs, and the reinforcing ribs are configured with a tic-tac-toe structure and fixed on the upper surface of the hanging plate.

[0012] In the above-mentioned liquid flow test device, the side surfaces of the two short reinforcing ribs are fixed to the long strip plate by bolt connection, and the side surfaces of the two long reinforcing ribs are connected to the two arc-shaped plates and the long strip plate.

[0013] In the above-mentioned liquid flow test device, each reinforcing rib in the reinforcing rib group has a thickness of 14 to 16 mm and a height of 140 to 150 mm.

[0014] In the above-mentioned liquid flow test device, the lifting mechanism includes a motor, a transmission shaft group, and a synchronous lifting screw group; the transmission shaft group includes a plurality of long transmission shafts and a plurality of short transmission shafts, and the synchronous lifting screw group includes a plurality of synchronous lifting screws, which are fixed on the support column, and the upper surface is connected to the lower surface of the end of the load-bearing beam; two synchronous lifting screws are respectively connected at both ends of the long transmission shaft; one end of the short transmission shaft is connected to the motor, and the other end is connected to the synchronous lifting screw.

[0015] In the above-mentioned liquid flow test device, the motor controls the synchronous lifting and lowering of the synchronous lifting screw through the transmission shaft, adjusts the height of the load-bearing beam, and adjusts the distance between the bottom of the test piece to be tested and the test base, and the adjustment distance is 0 to 60 mm.

[0016] In the above-mentioned liquid flow test device, the test base is a flat hollow structure with a plurality of reinforcing ribs arranged at the bottom; and the load-bearing beam is an I-beam structure.

[0017] In the above-mentioned liquid flow test device, the liquid inlet pipeline also includes a medium delivery pipeline, a pipeline interface, and a test tool pipeline; one end of the pipeline interface is connected to the test tool pipeline, and the other end is connected to the medium delivery pipeline.

[0018] In the above-mentioned liquid flow test device, the group of reflux holes is composed of multiple annular holes with different inner diameters, the inner diameter range of the group of reflux holes is 1700~3000mm, the aperture width of the reflux holes is 200~300mm, the diameter of the bolt hole group of the hanging plate is 800~2508mm, and the test tooling pipeline is made of metal.

[0019] The advantages of the present invention compared with the prior art are:

[0020] 1. The nozzle flow test device of the present invention is designed with a hoisting plate and a test bench that can be equipped with a variety of test pieces to be tested, which can realize the hoisting and testing process of products in various states and has strong versatility;

[0021] 2. The test bench of the nozzle liquid flow test device of the present invention realizes synchronous lifting of the column through the motor and the transmission shaft, and can adjust the lower end of the test piece to be tested to a certain height from the test bench, so that the outflow of the cooling channel can be visualized and the reflux of products in various states can be collected, which improves the convenience and accuracy of the test;

[0022] 3. The structural design of the nozzle flow test device of the present invention ensures that the test device has the ability to test heavy equipment;

[0023] 4. The test bench of the nozzle liquid flow test device of the present invention is provided with a hollow structure outside the reflux hole to ensure that no water accumulates on the surface of the test bench and at the same time meet the load-bearing requirements of the operator's on-site operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the nozzle liquid flow test device of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the hanging plate of the present invention;

[0026] Figure 3 It is a schematic diagram of the test base structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the installation method of the upper half of the upper section of the nozzle of the present invention;

[0028] Figure 5 It is a schematic diagram of the installation method of the lower half of the upper section of the nozzle of the present invention;

[0029] Figure 6 It is a schematic diagram of the installation method of the lower section of the nozzle of the present invention. DETAILED DESCRIPTION

[0030] like Figure 1 The figure shows a schematic diagram of the structure of the nozzle liquid flow test device of the present invention, a liquid flow test device for a heavy-duty liquid rocket engine nozzle comprises a hoisting plate 1, a lifting mechanism, a test bench, and a liquid inlet pipeline; the test piece to be tested is placed on the test bench after being connected to the hoisting plate 1, and is lifted and lowered under the control of the lifting mechanism, the liquid inlet pipeline is placed on one side of the test bench, the liquid inlet pipeline is connected to the test piece to be tested, the hoisting plate is provided with a group of mounting parts matching the top of the test piece to be tested for connecting with test pieces to be tested with different inner diameters, the test bench is provided with a group of reflux holes matching the bottoms of test pieces to be tested with different inner diameters, and the liquid in the liquid inlet pipeline flows through the test piece to be tested and then flows out through the reflux holes to enter the external liquid collecting tank placed under the test bench.

[0031] like Figure 1 As shown, in an embodiment of the present invention, the test bench includes a test base 7, a support part, and a load-bearing beam 2; the support part includes four support columns 6, which are arranged in a rectangular shape and stand vertically on the edge of the test base, the load-bearing beam 2 is placed above the support columns 6 in parallel with each other, and the reflux hole is arranged on the test base; the lifting mechanism includes a motor 5, a transmission shaft group 3, and a synchronous lifting screw group 31; the transmission shaft group includes 2 long transmission shafts and 2 short transmission shafts, and the synchronous lifting screw group includes 4 synchronous lifting screws, which are fixed on the support columns, and the upper surface is connected to the lower surface of the load-bearing beam end; two synchronous lifting screws are connected to both ends of the long transmission shaft respectively; one end of the short transmission shaft is connected to the motor, and the other end is connected to the synchronous lifting screw; the motor 5 controls the synchronous lifting screw 31 to rise and fall synchronously through the transmission shaft 3, thereby adjusting the height of the load-bearing beam 2, and the distance between the bottom of the test piece to be tested and the test base can be adjusted, and the adjustable distance is 0-60mm; the load-bearing beam is an I-beam structure; the lifting plate and the load-bearing beam are fixed by bolts.

[0032] like Figure 2 The figure shows a schematic diagram of the structure of the hanging plate of the present invention, the plate surface of the hanging plate 1 extends outward to form an end, which is connected to the load-bearing beam 2 through the end. The hanging plate 1 is a circular structure composed of a reinforcing rib group 13, an arc plate 12 and a long strip plate 11. The side edges of the two arc plates in the opening direction are respectively connected to the side edges of the long strip plate in the same horizontal plane to form a symmetrical structure. Ends are formed at both ends of the long strip plate, and a plurality of bolt holes are arranged on the end heads for fixing the hanging plate 1 on the test bench; the length m of the end head is 1 / 4 to 1 / 3 of the length of the long strip plate; a plurality of circles of bolt hole groups are arranged outward from the center of the hanging plate 1, and the bolt hole group consists of a plurality of threaded holes for installing and fixing the eye bolts of the test piece to be tested.

[0033] like Figure 2As shown, in an embodiment of the present invention, the reinforcing rib group 13 includes two long reinforcing ribs and two short reinforcing ribs, the ends of the long reinforcing ribs are built on the short reinforcing ribs, and the reinforcing ribs are configured with a tic-tac-toe structure and fixed on the upper surface of the lifting plate 1; the sides of the two short reinforcing ribs are fixed to the long strip plate by bolt connection, and the sides of the two long reinforcing ribs are connected to the two arc-shaped plates and the long strip plate; the thickness of each reinforcing rib in the reinforcing rib group is 14-16 mm, and the height is 140-150 mm, which can meet the lifting capacity of 1 ton; small circle bolt holes 141 are provided on the long strip plate inside the tic-tac-toe structure, and large circle bolt holes 142 are provided along the circumference of the circular ring, and the positions and number of the bolt holes included in the bolt hole group are matched with the bolt hole circle on the upper part of the test piece to be tested; the diameter of the bolt hole group of the lifting plate is 800-2508 mm.

[0034] like Figure 3 The figure shows a schematic diagram of the test base structure of the present invention, wherein the test base 7 is a flat hollow structure 72, and a group of reflux holes 71 are distributed outward from the center, wherein a group of reflux holes is composed of a plurality of annular holes with different inner diameters, and an inner diameter range of a group of reflux holes 71 is 1700 to 3000 mm, and an aperture width of the reflux holes 71 is 200 to 300 mm, and the aperture width refers to the difference between the radii of the inner ring and the outer ring of the reflux hole; a plurality of reinforcing ribs are arranged at the bottom 7 of the test base; a plurality of hollow small holes are arranged on the test base 7, and part of the test liquid can enter the collection box located below through the small holes, so that no water accumulates on the test base.

[0035] like Figure 1 As shown, the liquid inlet pipeline includes a medium delivery pipeline, a pipeline interface, and a test tool pipeline; Figure 5 As shown, one end of the pipeline interface is connected to the test tool pipeline, and the other end is connected to the medium delivery pipeline; the test tool pipeline is made of metal.

[0036] Example 1

[0037] like Figure 4 The figure shows the installation method of the upper half of the upper section of the nozzle of the present invention. In this embodiment, the test piece to be tested is the upper half 20 of the upper section of the nozzle. The working process of this embodiment is as follows:

[0038] (1) Install the eyebolts on the lifting plate 1, separate the lifting plate from the load beam 2 by a crane, and move it above the transport vehicle for the test piece to be tested;

[0039] (2) The small circle bolt holes 141 of the hanging plate 1 are connected and fixed to a circle of studs at the top of the upper half 20 of the nozzle upper section;

[0040] (3) After the lifting plate 1 is fixed to the upper half of the nozzle upper section, the lifting plate 1 and the upper half 20 of the nozzle upper section are hoisted as a whole by a crane, moved to the test station, and fixed to the load-bearing beam 2 through the bolt holes at both ends of the lifting plate 1;

[0041] (4) Connect the two pipeline interfaces 9 to the two inlet flanges at the top of the test piece through the test fixture pipeline 10. After the test bench water supply system starts the pump, the water supply to the product is completed through the medium delivery pipeline 8 and the pipeline interface 9;

[0042] (5) The motor 5 is controlled by the remote controller, and the motor 5 drives the four transmission shafts 3, and the four transmission shafts 3 drive the four lead screws 31 to move up and down, so that the top surface of the load-bearing beam 2 is 1100 mm above the ground. At this time, the bottom end of the upper half of the upper section of the nozzle is 30 mm away from the surface of the test bench, so that the liquid discharged from the discharge port around the bottom can completely pass through the small reflux hole 710. At this height, the test personnel can observe the uniformity of the outflow from the discharge port around the bottom of the product;

[0043] (6) After the test bench pump is started, water enters the product through the medium delivery pipe 8, the pipe interface 9 and the test tooling pipe. The flow rate is adjusted to 90 kg / s by the regulating valve. After the water flows through the product, it is discharged into the discharge port at the bottom. The discharged water enters the liquid collection box under the test bench through the small reflux hole 710. The test personnel can observe the discharge uniformity and use the pressure sensor to measure the product inlet pressure to measure the relationship between the pressure drop and flow rate in the cooling channel.

[0044] Example 2

[0045] like Figure 5 The figure shows the installation method of the lower half of the upper section of the nozzle of the present invention. In this embodiment, the test piece to be tested is the lower half 21 of the upper section of the nozzle. The working process of this embodiment is as follows:

[0046] (1) Install the eyebolts on the lifting plate 1, separate the lifting plate from the load beam 2 by a crane, and move it above the transport vehicle for the test piece to be tested;

[0047] (2) The large circle bolt holes 142 of the hanging plate 1 are connected and fixed to a circle of studs at the top of the lower half 21 of the upper section of the nozzle;

[0048] (3) After the lifting plate 1 is fixed to the lower half of the upper section of the nozzle, the lifting plate 1 and the nozzle product are hoisted as a whole by a crane, moved to the test station, and fixed to the load-bearing beam 2 through the bolt holes at both ends of the lifting plate 1;

[0049] (4) Connect the two pipeline interfaces 9 to the two inlet flanges at the top of the test piece through the test fixture pipeline 10. After the test bench water supply system starts the pump, the water supply to the product is completed through the medium delivery pipeline 8 and the pipeline interface 9;

[0050] (5) The motor 5 is controlled by the remote controller, and the motor 5 drives the four transmission shafts 3, and the four transmission shafts 3 drive the four lead screws 31 to move up and down, so that the top surface of the load-bearing beam 2 is 1150 mm above the ground. At this time, the bottom end of the upper half of the upper section of the nozzle is 60 mm away from the surface of the test bench, so that the liquid discharged from the discharge port around the bottom can completely pass through the small reflux hole 710. At this height, the test personnel can observe the uniformity of the outflow from the discharge port around the bottom of the product;

[0051] (6) After the test bench pump is started, water enters the product through the medium delivery pipe 8, the pipe interface 9 and the test tooling pipe. The flow rate is adjusted to 90 kg / s by the regulating valve. After the water flows through the product, it is discharged into the discharge port at the bottom. The discharged water enters the liquid collection box under the test bench through the small reflux hole 710. The test personnel can observe the discharge uniformity and use the pressure sensor to measure the product inlet pressure to measure the relationship between the pressure drop and flow rate in the cooling channel.

[0052] Example 3

[0053] like Figure 6 The figure shows the installation method of the upper half of the upper section of the nozzle of the present invention. In this embodiment, the test piece to be tested is the lower half 21 of the upper section of the nozzle. The working process of this embodiment is as follows:

[0054] (1) Install the eyebolts on the lifting plate 1, separate the lifting plate from the load beam 2 by a crane, and move it above the transport vehicle for the test piece to be tested;

[0055] (2) The large circle bolt holes 142 of the hanging plate 1 are connected and fixed to a circle of studs at the top of the nozzle lower section 22;

[0056] (3) After the lifting plate 1 is fixed to the lower half of the upper section of the nozzle, the lifting plate 1 and the nozzle product are hoisted as a whole by a crane, moved to the test station, and fixed to the load-bearing beam 2 through the bolt holes at both ends of the lifting plate 1;

[0057] (4) Connect the two pipeline interfaces 9 to the two inlet flanges at the top of the test piece through the test fixture pipeline 10. After the test bench water supply system starts the pump, the water supply to the product is completed through the medium delivery pipeline 8 and the pipeline interface 9;

[0058] (5) The motor 5 is controlled by the remote controller, and the motor 5 drives the four transmission shafts 3, and the four transmission shafts 3 drive the four lead screws 31 to move up and down, so that the top surface of the load-bearing beam 2 is 1330 mm above the ground. At this time, the bottom end of the upper half of the upper section of the nozzle is 50 mm away from the surface of the test bench, so that the liquid discharged from the discharge port around the bottom can completely pass through the large reflux hole 71. At this height, the test personnel can observe the uniformity of the outflow from the discharge port around the bottom of the product;

[0059] (6) After the test bench pump is started, water enters the product through the medium delivery pipe 8, the pipe interface 9 and the test tooling pipe. The flow rate is adjusted to 90 kg / s by the regulating valve. After the water flows through the product, it is discharged into the discharge port at the bottom. The discharged water enters the liquid collection box under the test bench through the large reflux hole 71. The test personnel can observe the discharge uniformity and use the pressure sensor to measure the product inlet pressure to measure the relationship between the pressure drop and flow rate in the cooling channel.

[0060] The above description is only the best specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

[0061] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A liquid flow test device for a heavy-lift liquid rocket engine nozzle, characterized in that: It includes a hanging plate, a lifting mechanism, a test bench, and a liquid inlet pipeline; the test piece to be tested is placed on the test bench after being connected to the hanging plate, and is lifted and lowered under the control of the lifting mechanism; the liquid inlet pipeline is placed on one side of the test bench, and the liquid inlet pipeline is connected to the test piece to be tested; the hanging plate is provided with a group of mounting parts matching the top of the test piece to be tested, and is used to connect with the test pieces to be tested with different inner diameters; the test bench is provided with a group of reflux holes matching the bottoms of the test pieces to be tested with different inner diameters; the liquid in the liquid inlet pipeline flows through the test piece to be tested and then flows out through the reflux holes; the hanging plate is a circular structure consisting of a reinforcing rib group, an arc plate and a long strip plate; the side edges of the two arc plates in the opening direction are respectively connected to the side edges of the long strip plate at the same horizontal plane to form a symmetrical structure, and end caps are formed at both ends of the long strip plate.

2. A liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 1, characterized in that: The test bench comprises a test base, a support part and a load-bearing beam; the support part comprises a plurality of support columns, the support columns are installed on the edge of the test base, the load-bearing beam is placed above the support columns, and the reflux hole is arranged on the test base.

3. A liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 2, characterized in that: The end is connected to the load-bearing beam.

4. A liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 1, characterized in that: The length m of the end of the hanging plate is 1 / 4 to 1 / 3 of the length of the long strip.

5. A liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 2, characterized in that: The group of mounting parts is a group of bolt holes arranged outward from the center of the hanging plate. The bolt hole group consists of a number of threaded holes and is used to install and fix the eye bolts of the test piece to be tested.

6. A liquid flow test device for a nozzle of a heavy-lift liquid rocket engine according to claim 1, characterized in that: The reinforcing rib group includes a plurality of long reinforcing ribs and a plurality of short reinforcing ribs. The ends of the long reinforcing ribs are built on the short reinforcing ribs. The reinforcing ribs are provided with a tic-tac-toe structure and are fixed on the upper surface of the hanging plate.

7. A liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 6, characterized in that: The side surfaces of the plurality of short reinforcing ribs are fixed to the long strip plate by bolt connection, and the side surfaces of the plurality of long reinforcing ribs are connected to the two arc-shaped plates and the long strip plate.

8. The liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 6, characterized in that: The thickness of each reinforcing rib in the reinforcing rib group is 14-16 mm, and the height is 140-150 mm.

9. The liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 1, characterized in that: The lifting mechanism includes a motor, a transmission shaft group, and a synchronous lifting screw group; the transmission shaft group includes a plurality of long transmission shafts and a plurality of short transmission shafts, and the synchronous lifting screw group includes a plurality of synchronous lifting screws, which are fixed on the support column, and the upper surface is connected to the lower surface of the end of the load-bearing beam; two synchronous lifting screws are respectively connected at both ends of the long transmission shaft; one end of the short transmission shaft is connected to the motor, and the other end is connected to the synchronous lifting screw.

10. A liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 9, characterized in that: The motor controls the synchronous lifting and lowering of the synchronous lifting screw through the transmission shaft, adjusts the height of the load-bearing beam, and adjusts the distance between the bottom of the test piece to be tested and the test base, and the adjustment distance is 0 to 60 mm.

11. A liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 2, characterized in that: The test base is a flat hollow structure with a plurality of reinforcing ribs arranged at the bottom; the load-bearing beam is an I-beam structure.

12. A liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 1, characterized in that: The liquid inlet pipeline also includes a medium delivery pipeline, a pipeline interface, and a test tool pipeline; one end of the pipeline interface is connected to the test tool pipeline, and the other end is connected to the medium delivery pipeline; the test tool pipeline is made of metal.

13. The liquid flow test device for a heavy-lift liquid rocket engine nozzle according to claim 5, characterized in that: The group of reflux holes is composed of a plurality of annular holes with different inner diameters, the inner diameter range of the group of reflux holes is 1700-3000 mm, the aperture width of the reflux holes is 200-300 mm, and the diameter of the bolt hole group of the hanging plate is 800-2508 mm.

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