Liquid flow test fastening device for liquid rocket engine combustion device

Abstract

The invention discloses a liquid flow test fastening device for a liquid rocket engine combustion device. The liquid flow test fastening device comprises a lifting device and a clamping device, the lifting device comprises a base, a supporting seat, a transmission shaft, a bearing beam, a lifting hand wheel, a lifting device positioning groove and a lead screw; the clamping device comprises a fastening hand wheel, a universal joint, a fastening rod, a fastening rod tail end flange, a fastening tool, a lifting ring bolt and a clamping device base. A test product is fixed by the clamping device, the clamping device is placed on a lifting device positioning groove of the lifting device through an eyebolt on a clamping device base, the lead screws are fixed on the supporting position, the supporting position is fixed on the base, the lifting hand wheel controls actions of the multiple sets of lead screws by driving the transmission shaft, and the multiple sets of lead screws support the bearing beam. The fastening rods and the fastening hand wheel are connected through the universal joints, the fastening hand wheel drives the fastening rods to move synchronously, fastening rod tail end flanges are arranged at the tail ends of the fastening rods, and the fastening rod tail end flanges are connected with the fastening tool.

Description

Technical Field

[0001] The invention relates to a liquid flow test fastening device for a liquid rocket engine combustion device, which is used for testing the liquid rocket engine. Background Art

[0002] As the core part of a liquid rocket engine, the thrust chamber can convert the chemical energy of liquid propellant into kinetic energy and generate thrust through jetting. The thrust chamber is connected to the nozzle by fixing it through a tail flange or by welding the thrust chamber and the nozzle into an integrated assembly. As the integrated assembly design is more reliable, the thrust chamber and nozzle are now mostly welded into an integrated design.

[0003] When conducting a liquid flow test on a traditional thrust chamber, the tail flange at the bottom of the thrust chamber is connected and fixed to the bracket, and the system is connected to the inlet of the thrust chamber through a rigid pipeline for medium supply, so as to measure the flow resistance characteristics of the thrust chamber. In recent years, in order to reduce the weight of the engine, the thrust chamber and the nozzle have adopted an integrated processing technology, eliminating structures such as the tail flange and the collector, which has also made it difficult to fix the product. At the same time, the external dimensions of different thrust chamber assemblies are also different. If a clamping device is designed for a product of a certain shape, it will not be universal. Therefore, the traditional liquid flow test device cannot meet the test characteristics of the thrust chamber assembly with different external dimensions and multiple states.

[0004] Therefore, it is necessary to design a liquid flow test fastening device for a liquid rocket engine combustion device, which can meet the multi-state and large-size fixing requirements of the thrust chamber, nozzle, and thrust chamber assembly. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and solve the problems such as the difficulty in fixing some combustion device products of liquid rocket engines during testing.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The invention discloses a liquid flow test fastening device for a liquid rocket engine combustion device, which consists of a lifting device and a clamping device.

[0008] The lifting device includes a base, a support seat, a transmission shaft, a load-bearing beam, a lifting handwheel, a lifting device positioning groove, and a lead screw; the clamping device includes a tightening handwheel, a universal joint, a tightening rod, a tightening rod end flange, a tightening tooling, a soft rubber pad, a lifting eye bolt, and a clamping device base.

[0009] The test product is fixed by a clamping device, which is placed on the lifting device positioning slot of the lifting device by screwing the eyebolt on the base of the clamping device. The lead screw is fixed on the support position, and the support seat is fixed on the base. The lifting handwheel controls the movement of the four sets of lead screws by driving the transmission shaft. The four sets of lead screws support the load beam, which can change the height of the load beam from the base to facilitate liquid discharge. The base of the lifting device is fixed above the receiving pool, and the cooling channel outflow is adjusted to a suitable height to enter the receiving pool for testing.

[0010] The tightening rod and the tightening handwheel on the base of the clamping device are connected by a universal joint, and the tightening handwheel drives the tightening rod to move synchronously. The end of the tightening rod is provided with a tightening rod end flange, which is connected to the tightening fixture by an M12 bolt. The curved surface at the end of the tightening fixture is covered with a soft rubber pad to protect the curved surface of the product when the pre-tightening force is applied.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) The device of the present invention adopts a universal joint design, and a pre-tightening force is applied by a hand wheel to tighten the product. It can be applied to combustion device products of different sizes to carry out liquid flow tests, and can clamp and fix the external surfaces of combustion device products of different sizes, and has strong versatility.

[0013] (2) The device of the present invention adopts a detachable fastening fixture design, and the fastening fixture and the clamping rod are connected by a flange. The fastening fixture can be quickly replaced for clamping and fixing of combustion device products of different sizes and shapes, and the device replacement is convenient.

[0014] (3) The contact position between the fastening fixture of the device of the present invention and the outer surface of the combustion device product is designed to be covered with a soft rubber pad. When the hand wheel applies a pre-tightening force, the pre-tightening force can better act on the outer surface of the product in a circumferential direction and protect the product.

[0015] (4) The device of the present invention adopts a segmented design. The clamping device in the upper part of the device can be quickly assembled with the lifting device in the lower part. The clamping device in the upper part can clamp the combustion device product and then lift the combustion device product. After the lifting is completed, it can be quickly installed and clamped in the lower lifting mechanism, which is easy to use.

[0016] (5) The device of the present invention is provided with a lifting function. The four transmission shafts are driven by a hand wheel to control the movement of the lead screw. The height of the clamping position of the fastening tool can be adjusted to better suit products of different heights. At the same time, the height of the lower end of the product from the ground of the test bench can also be adjusted to facilitate observation of the outflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the lifting device of the present invention.

[0018] Figure 2 It is a schematic diagram of the clamping device of the present invention.

[0019] Figure 3 It is a schematic diagram of the composition of the fastening device for the combustion liquid flow test of the liquid rocket engine of the present invention.

[0020] Figure markings: 1-lifting device; 2-clamping device; 3-base; 4-support seat; 5-transmission shaft; 6-load-bearing beam; 7-lifting handwheel; 8-lifting device positioning groove; 9-screw; 10-fastening handwheel; 11-universal joint; 12-fastening rod; 13-fastening rod end flange; 14-fastening tooling; 15-soft rubber pad; 16-lifting eye bolt; 17-clamping device base. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] A liquid flow test fastening device for a liquid rocket engine combustion device is composed of a lifting device 1 and a clamping device 2. The lifting device 1 is as follows: Figure 1 As shown, the clamping device 2 is as shown in Figure 2 As shown, the overall device is Figure 3 shown.

[0023] The lifting device 1 includes a base 3, a support base 4, a transmission shaft 5, a load-bearing beam 6, a lifting handwheel 7, a lifting device positioning groove 8, and a screw 9; the clamping device 2 includes a fastening handwheel 10, a universal joint 11, a fastening rod 12, a fastening rod end flange 13, a fastening tooling 14, a soft rubber pad 15, a lifting eye bolt 16, and a clamping device base 17.

[0024] The test product is fixed by the clamping device 2, which is placed on the lifting device positioning slot 8 of the lifting device 1 by screwing the eyebolt 16 on the clamping device base 17, and the lead screw 9 is fixed on the support position 4, and the support seat 4 is fixed on the base 3. The lifting handwheel 7 controls the movement of the four sets of lead screws 9 by driving the transmission shaft 5. The four sets of lead screws 9 support the load beam 6, which can change the height of the load beam 6 from the base 3 to facilitate the discharge of liquid. The base 3 of the lifting device 1 is fixed above the receiving pool, and the cooling channel outflow is allowed to enter the receiving pool by adjusting the appropriate height to carry out the test.

[0025] The six fastening rods 12 on the clamping device base 17 are connected to the fastening handwheel 10 by 14 universal joints 11, and the six fastening rods 12 are driven to move synchronously by the fastening handwheel 10. A fastening rod end flange 13 is provided at the end of the fastening rod 12, and the fastening rod end flange 13 is connected to the fastening fixture 14 by four M12 bolts. The arc surface at the end of the fastening fixture 14 is covered with a soft rubber pad 15 to protect the arc surface of the product when the pre-tightening force is applied.

[0026] The length of the fastening rod 12 is 1000 mm. After the fastening rod 12 is connected to the fastening device 14, it can meet the requirements of clamping and fixing combustion device products within the diameter range of 350 mm to 950 mm.

[0027] The use process of the device of the present invention is:

[0028] a. Use four M12 bolts to connect the fastening fixture 14 to the end flange 13 of the fastening rod. Perform this connection operation on all six fastening rods.

[0029] b. Shake the tightening hand wheel 10 to drive the six tightening rods 12 to move outward synchronously through the universal joint 11, so that the diameter of the circle formed by the tightening tooling 14 reaches the maximum.

[0030] c. Use a crane to lift the clamping device 2 as a whole by screwing the eye bolt 16 on the clamping device base 17, and move the clamping device 2 so that the outer arc surface of the combustion device product is finally inside the circle formed by the fastening tooling 14.

[0031] d. Shake the tightening hand wheel 10 to drive the six tightening rods 12 to move inward synchronously through the universal joint 11, apply pre-tightening force to the outer arc surface of the product, and tighten the product.

[0032] e. Use a crane to place the clamping device 2 and the combustion device product together in the lifting device positioning groove 8 of the lifting device 1 through the eye bolt 16.

[0033] f. Use the lifting hand wheel 7 to control the movement of the four sets of lead screws 9 by driving the transmission shaft 5, so that the height of the load-bearing beam 6 from the base 3 changes, and adjust the product position to a suitable height.

[0034] g. Connect the test system pipeline to the product.

[0035] h. Start the test bench water pump, adjust the flow rate through the regulating valve to flush the product, adjust the flow rate of the regulating valve to the rated flow rate, and use the pressure measuring nozzle to measure the pressure drop of the combustion device assembly.

[0036] i. After the test, stop the water pump. Lift the clamping device 2 and the combustion device assembly by screwing the eyebolt 16 on the clamping device base 17, and place the product on the ground.

[0037] j. Shake the tightening hand wheel 10 to separate the clamping device 2 from the product and complete the test.

[0038] The present invention can solve the problem of fixing combustion device products of different sizes within the diameter range of 350mm to 950mm, and has strong versatility; a detachable fastening tool design is adopted, and the fastening tool and the clamping rod are connected by a flange, and the fastening tool can be quickly replaced for combustion device products of different sizes and shapes, and it is convenient to use; the contact position between the clamping device and the outer surface of the combustion device product is designed to be covered with a soft rubber pad, which has stronger protection for the outer surface of the product; the upper and lower parts of the device of the present invention adopt a segmented design, which can realize the hoisting and fixation of the product, and is equipped with a quick positioning slot, which is convenient for installation; the four columns can be lifted and lowered synchronously by the motor and the four transmission shafts, and the lower end of the product can be adjusted to a suitable height from the ground of the test bench, which is convenient for collecting liquid discharge, and at the same time, the height of the clamping position of the fastening tool can be changed, which is better suitable for products of different heights.

[0039] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

[0040] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A liquid flow test fastening device for a liquid rocket engine combustion device, characterized in that: It comprises a lifting device (1) and a clamping device (2); The lifting device (1) comprises a base (3), a support seat (4), a transmission shaft (5), a bearing beam (6), a lifting hand wheel (7), a lifting device positioning groove (8), and a lead screw (9); the clamping device (2) comprises a tightening hand wheel (10), a universal joint (11), a tightening rod (12), a tightening rod end flange (13), a tightening tool (14), a lifting eye bolt (16), and a clamping device base (17); The test product is fixed by a clamping device (2), the clamping device (2) is placed on a lifting device positioning groove (8) of a lifting device (1) through a lifting eye bolt (16) on a clamping device base (17), a lead screw (9) is fixed on a support position (4), the support position (4) is fixed on a base (3), a lifting hand wheel (7) controls the movement of multiple groups of lead screws (9) through a driving transmission shaft (5), and the multiple groups of lead screws (9) support a load-bearing beam (6); A plurality of fastening rods (12) and a fastening hand wheel (10) are connected by using a plurality of universal joints (11), and the plurality of fastening rods (12) are driven to move synchronously by the fastening hand wheel (10). A fastening rod end flange (13) is provided at the end of the fastening rod (12), and the fastening rod end flange (13) is connected to a fastening tool (14).

2. The liquid flow test fastening device according to claim 1, characterized in that: The base (3) of the lifting device (1) is fixed above the receiving pool, and the outflow of the cooling channel is allowed to enter the receiving pool by adjusting the appropriate height to carry out the test.

3. The liquid flow test fastening device according to claim 1, characterized in that: After the fastening rod (12) is connected to the fastening device (14), it can meet the requirements of clamping and fixing combustion device products within the diameter range of 350mm to 950mm.

4. The liquid flow test fastening device according to claim 1, characterized in that: The height of the load-bearing beam (6) from the base (3) is changed by means of multiple sets of lead screws (9) so as to facilitate the discharge of liquid.

5. The liquid flow test fastening device according to claim 1, characterized in that: The end flange (13) of the fastening rod is connected to the fastening fixture (14) through bolts.

6. The liquid flow test fastening device according to claim 1, characterized in that: The clamping device (2) also includes a soft rubber pad (15), and the curved surface at the end of the fastening tool (14) is coated with the soft rubber pad (15), so as to protect the curved surface of the product when a pre-tightening force is applied.

7. The liquid flow test fastening device according to claim 1, characterized in that: The use process of the liquid flow test fastening device is as follows: a. Use bolts to connect the fastening fixture (14) to the end flange (13) of the fastening rod; b. Shake the tightening hand wheel (10) to drive the (6) tightening rods (12) to move outward synchronously through the universal joint (11) so that the diameter of the circle formed by the tightening tool (14) reaches the maximum; c. Use a crane to lift the clamping device (2) as a whole by screwing the eyebolt (16) on the base (17) of the clamping device, and move the clamping device (2) so that the outer arc surface of the combustion device product is finally inside the circle formed by the fastening tooling (14); d. Shake the tightening hand wheel (10) to drive (6) tightening rods (12) to move inward synchronously through the universal joint (11), apply pre-tightening force to the outer arc surface of the product, and tighten the product; e. Using a crane, the clamping device (2) and the combustion device are placed together in the lifting device positioning groove (8) of the lifting device (1) through the eye bolt (16); f. Use the lifting hand wheel (7) to control the movement of the four sets of screws (9) through the drive shaft (5), so that the height of the load beam (6) from the base (3) changes, and adjust the product position to a suitable height; g. Connect the test system pipeline to the product; h. Start the test bench water pump, adjust the flow rate through the regulating valve to flush the product, adjust the flow rate of the regulating valve to the rated flow rate, and use the pressure measuring nozzle to measure the pressure drop of the combustion device assembly; i. After the test, stop the water pump; lift the clamping device (2) and the combustion device assembly by screwing the eyebolt (16) on the base of the clamping device (17), and place the product on the ground; j. Shake the tightening hand wheel (10) to separate the clamping device (2) from the product and complete the test.

8. The liquid flow test fastening device according to claim 1, characterized in that: According to the combustion device products of different sizes and shapes, the fastening tools of different sizes are adjusted.

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