Device and method for testing flow velocity of composite solid propellant slurry

Abstract

The invention discloses a composite solid propellant slurry flow velocity testing device and a testing method, and relates to the technical field of composite solid propellant slurry flow property testing, the composite solid propellant slurry flow velocity testing device comprises a base, an electronic balance is arranged at the bottom of the inner side of the base, and a propellant grain separation mechanism is arranged at the top of the inner side of the base. A composite solid propellant slurry containing and heating mechanism and a shell are arranged at the top of the base, the shell is located on the outer side of the composite solid propellant slurry containing and heating mechanism and fixedly connected with the base, and a driving mechanism is arranged at the top of the inner side of the shell; a synchronous sealing mechanism is arranged at the bottom end of the driving mechanism; and a pressurizing mechanism is arranged outside the driving mechanism. According to the propellant grain cleaning device, a plurality of formed propellant grains can be synchronously cleaned after testing is completed, the automation degree is higher, the operation difficulty is lowered, manpower is saved, and meanwhile the cleaning time is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of composite solid propellant slurry flowability testing, and in particular to a composite solid propellant slurry flow rate testing device and a testing method. Background Art

[0002] Composite solid propellant slurry is a high-solid content and high-viscosity liquid, and is always accompanied by a curing reaction. The composite propellant pressurized curing process refers to the process of continuing to apply a constant pressure to the propellant slurry after the pouring process is completed, and maintaining it until the propellant column is completely cured.

[0003] The invention patent with authorization announcement number CN110082258B discloses a composite solid propellant slurry flow rate test device and test method, in which insulation jackets are respectively mounted on the outer shells of three viscosity cups. The pressure output pipeline provides pressure for each viscosity cup. A pressure transmitter and a precision pressure reducing valve are installed on the pressure output pipeline. The signal output end of the pressure transmitter is connected to the signal input end of the computer through a data line. The signal output end of the electronic balance is connected to the signal input end of the computer through a data line. The periodic test method is used to obtain the flow rate of the propellant slurry in each sampling period in turn until the average value of the mass of the propellant slurry in the period is less than 1g / min.

[0004] The invention reproduces the pressurized curing production process conditions, simulates the pressurized pouring process of multiple models of medium-energy solid rocket engines, and applies the slurry flow rate experimental model to detect the changing trend of the slurry fluidity with the curing reaction, and gives the high-solid content and high-viscosity slurry flow rate and the accurate time of pressurized curing.

[0005] However, after actual research by technicians in this field, it was found that the above test device and test method still have some shortcomings. The most obvious one is that after the test is completed, the composite solid propellant slurry will form a propellant column in the viscosity cup due to the curing reaction. Since the discharge port below the viscosity cup has an extremely small diameter, the propellant column can only be cleaned through the viscosity cup opening, which is difficult to operate and time-consuming. In addition, in order to ensure the test accuracy, multiple viscosity cups need to be set up for testing at the same time, which further increases the time required for cleaning the propellant column.

[0006] Therefore, it is necessary to invent a composite solid propellant slurry flow rate testing device and a testing method to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a composite solid propellant slurry flow rate testing device and testing method, which are provided with a propellant grain discharging mechanism, a composite solid propellant slurry containing and heating mechanism, a driving mechanism, a synchronous sealing mechanism and a pressurizing mechanism, so that the driving mechanism can be used to drive the synchronous sealing mechanism to move downward, and after the synchronous sealing mechanism moves downward, the top of the composite solid propellant slurry containing and heating mechanism is sealed, and then the driving mechanism drives the propellant grain discharging mechanism to rotate, so that the propellant grain discharging mechanism releases the blockage of the bottom of the composite solid propellant slurry containing and heating mechanism, so as to start the flow rate test operation, and after the subsequent test is completed, the driving mechanism moves upward to make the propellant grain discharging mechanism reclose The pressurizing mechanism is then pushed to pressurize the propellant column discharging mechanism, and the propellant column discharging mechanism then simultaneously pushes out the multiple propellant columns inside the heating mechanism containing the composite solid propellant slurry, so as to solve the problem proposed in the above background technology that after the test is completed, the composite solid propellant slurry will form propellant columns in the viscosity cup due to the curing reaction. Since the discharge port below the viscosity cup has an extremely small diameter, the propellant columns can only be cleaned through the opening of the viscosity cup, which is difficult to operate and time-consuming. In addition, in order to ensure the test accuracy, multiple viscosity cups need to be set up for testing at the same time, which further increases the time required for cleaning the propellant columns.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a composite solid propellant slurry flow rate testing device, comprising a base, an electronic balance is arranged at the inner bottom of the base, a propellant grain disengagement mechanism is arranged at the inner top of the base, a composite solid propellant slurry containing and heating mechanism and a shell are arranged at the top of the base, the shell is located outside the composite solid propellant slurry containing and heating mechanism and is fixedly connected to the base, a driving mechanism is arranged at the inner top of the shell, a synchronous sealing mechanism is arranged at the bottom of the driving mechanism and a pressurizing mechanism is arranged at the outer side; The driving mechanism drives the synchronous sealing mechanism to move downward, and after the synchronous sealing mechanism moves downward, it seals the top of the composite solid propellant slurry containing and heating mechanism, and the driving mechanism drives the propellant grain discharging mechanism to rotate to release the blockage of the bottom of the composite solid propellant slurry containing and heating mechanism, and the driving mechanism pushes the pressurizing mechanism when moving upward, and the pressurizing mechanism pressurizes the propellant grain discharging mechanism, and the propellant grain discharging mechanism synchronously pushes out multiple propellant grains inside the composite solid propellant slurry containing and heating mechanism.

[0009] Preferably, the propellant charge ejection mechanism comprises a rotating tube, a torsion spring, a gear, a branch pipe and a sealing cover; The two ends of the rotating tube respectively penetrate the inner wall of the base and extend to the outside of the base. The rotating tube is rotatably connected to the base through a bearing. The torsion spring and the gear are sequentially sleeved from the inside to the outside and are arranged at the outer end of the rotating tube. The torsion spring is fixedly connected between the inner wall of the base and the rotating tube. The gear is fixedly connected to the rotating tube. There are multiple branch pipes and sealing covers. The multiple branch pipes are evenly fixedly connected to the front of the rotating tube. The multiple sealing covers are respectively fixedly arranged at the ends of the multiple branch pipes. A one-way valve is arranged on the inside of the sealing cover.

[0010] Preferably, the composite solid propellant slurry containing and heating mechanism comprises a viscosity cup and a water bath; The viscosity cups are arranged in plurality, and the plurality of viscosity cups are evenly fixed and penetrated through the top of the base, and the water bath box is fixedly sleeved and arranged outside the plurality of viscosity cups.

[0011] Preferably, the driving mechanism comprises a reciprocating screw, a driving motor, an outer sleeve, a first return spring, an inner sleeve, a guide plate and a rack; The reciprocating screw passes through the top of the outer shell and extends to the inner side of the outer shell. The driving motor is fixedly arranged on the top of the outer shell and is transmission-connected to the reciprocating screw. The outer sleeve, the first return spring and the inner sleeve are sequentially sleeved on the outer side of the driving motor from top to bottom. The outer sleeve is transmission-connected to the reciprocating screw. The first return spring is fixedly connected between the outer sleeve and the inner sleeve. The inner sleeve is slidingly connected to the reciprocating screw and is slidably nested in the inner side of the outer sleeve along the vertical direction. The guide plate is fixedly sleeved on the top of the outer side of the outer sleeve, and the rack is fixedly arranged on the bottom of the guide plate.

[0012] Preferably, the synchronous sealing mechanism comprises a top plate, a U-shaped frame, a sealing cover and a negative pressure pipe; The U-shaped frame is fixedly arranged at the bottom end of the inner sleeve, the top plate is fixedly arranged at the bottom of the top plate, and a plurality of sealing covers and negative pressure tubes are arranged. The plurality of sealing covers are respectively located directly above the plurality of viscosity cups and are fixedly arranged at the bottom of the top plate, and the plurality of negative pressure tubes are respectively fixedly arranged through the tops of the plurality of sealing covers, and the plurality of negative pressure tubes are fixedly arranged through the top of the top plate, and the input end of the negative pressure tube is connected with a pressure generating device.

[0013] Preferably, the pressurizing mechanism comprises an annular sealing housing, a transmission pipe, a piston plate, a piston rod, a bottom plate and a second return spring; The annular sealing shell is located outside the reciprocating screw and is fixedly arranged on the top of the inner side of the shell. Two transmission pipes are arranged. The two transmission pipes are respectively fixedly penetrated on both sides of the annular sealing shell and are respectively connected to the two ends of the rotating tube through rotating joints. The piston plate is slidably arranged on the inner side of the annular sealing shell along the vertical direction. The piston rod is slidably penetrated at the bottom of the annular sealing shell and is fixedly connected between the piston plate and the bottom plate. The second return spring is sleeved on the outside of the piston rod.

[0014] The present invention also discloses a composite solid propellant slurry flow rate testing method, which is implemented using the composite solid propellant slurry flow rate testing device described above, and the method specifically comprises the following steps: S1. The propellant slurry is loaded into the inner sides of three viscosity cups respectively, and the surface of the propellant slurry is flush with the inner edge of the viscosity cup. Hot water is input into the water bath through the water inlet pipe on the water bath. The hot water heats the three viscosity cups. The circulated hot water is output through the water outlet pipe on the water bath. A weighing paper is placed on the top of the electronic balance. S2, start the drive motor, the drive motor drives the reciprocating screw to rotate, the reciprocating screw rotates and drives the outer sleeve to descend, the outer sleeve descends and drives the inner sleeve to descend through the first return spring, drives the rack to descend through the guide plate, the inner sleeve descends and drives the top plate to descend through the U-shaped frame, and drives the three sealing covers to descend synchronously when the top plate descends; S3, when the outer sleeve descends to a first threshold, the three sealing covers are respectively covered on the tops of the three viscosity cups, thereby sealing the top openings of the three viscosity cups. At this time, due to the obstruction of the viscosity cups, the synchronous sealing mechanism cannot continue to descend. At the same time, as the outer sleeve continues to descend, the inner sleeve continues to compress the first return spring, and the guide plate continues to drive the rack to descend; S4, when the outer sleeve descends to a second threshold, the rack meshes with the gear, and as the rack continues to move downward, the gear drives the rotating tube to rotate, and the rotating tube drives the branch pipe and the sealing cover to move away from the discharge port at the bottom of the viscosity cup; S5, when the outer sleeve descends to a third threshold, the rotating tube drives the long end of the branch pipe to rotate to a vertical state, and at the same time, the outer sleeve moves to the bottom of the reciprocating thread outside the drive motor, and the drive motor is stopped at this time; S6. The three viscosity cups are pressurized by the pressure generating device connected to the negative pressure tube to provide a driving force for the propellant slurry inside the three viscosity cups to flow downward, so that the propellant slurry drips onto the weighing paper through the discharge port at the bottom of the viscosity cup. The mass of the slurry on the weighing paper is weighed by an electronic balance. The average mass of the slurry dripped onto the weighing paper by the three viscosity cups is obtained, which is the flow rate of the propellant slurry in the current sampling period. The above operation is repeated multiple times until the average mass of the propellant slurry in the period is less than 1 g / min. S7, start the driving motor again, and the driving motor drives the reciprocating screw to rotate again. When the reciprocating screw rotates, the outer sleeve is driven to move upward and reset. During the upward and reset process of the outer sleeve, the propellant column ejection mechanism and the synchronous sealing mechanism are successively reset. At this time, the top of the viscosity cup is no longer sealed, and the sealing cover is again sleeved on the outer side of the discharge port at the bottom of the viscosity cup; S8, when the upward movement distance of the outer sleeve reaches the fourth threshold, the outer sleeve drives the initial station, at which time the top of the guide plate fits with the bottom of the bottom plate, and subsequently as the guide plate continues to move upward, the bottom plate compresses the second return spring, and at the same time drives the piston plate to continuously move upward inside the annular sealing shell through the piston rod, and during the upward movement of the piston plate, the air inside the annular sealing shell is pushed, and the air inside the annular sealing shell enters into the rotating tube through the transmission tube, and then enters into the viscosity cup through the branch pipe and the sealing cover, thereby pushing the propellant column inside the viscosity cup upward; S9, when the upward movement distance of the outer sleeve reaches the fifth threshold, the outer sleeve moves to the top of the reciprocating thread outside the reciprocating screw. At this time, the propellant column inside the viscosity cup is pushed out from the top opening of the viscosity cup under the action of pressure. Subsequently, as the reciprocating screw continues to rotate, the outer sleeve moves downward and resets, and the pressurizing mechanism also gradually resets; S10, when the downward movement distance of the outer sleeve reaches the sixth threshold, the outer sleeve arrives at the initial position again, and the drive motor is stopped at this time.

[0015] Technical effects and advantages of the present invention:

[0016] The present invention is provided with a propellant grain discharging mechanism, a composite solid propellant slurry containing and heating mechanism, a driving mechanism, a synchronous sealing mechanism and a pressurizing mechanism, so that the driving mechanism can be used to drive the synchronous sealing mechanism to move downward, and the synchronous sealing mechanism seals the top of the composite solid propellant slurry containing and heating mechanism after moving downward, and then the driving mechanism drives the propellant grain discharging mechanism to rotate, so that the propellant grain discharging mechanism releases the blockage of the bottom of the composite solid propellant slurry containing and heating mechanism, so as to start the flow rate test operation, and after the subsequent test is completed, the driving mechanism moves upward to reset the propellant grain discharging mechanism, and then pushes the pressurizing mechanism, so that the pressurizing mechanism pressurizes the propellant grain discharging mechanism, and the propellant grain discharging mechanism synchronously pushes out multiple propellant grains inside the composite solid propellant slurry containing and heating mechanism. Compared with the same type of devices and methods in the prior art, the present invention can synchronously clean multiple formed propellant grains after the test is completed, with a higher degree of automation, reduced operating difficulty, saving manpower and shortening the time required for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is a schematic diagram of the structure of the propellant grain ejection mechanism of the present invention; Figure 3 It is a schematic cross-sectional structure diagram of the composite solid propellant slurry containing and heating mechanism of the present invention; Figure 4 It is a schematic cross-sectional structure diagram of the driving mechanism of the present invention; Figure 5 It is a schematic cross-sectional structure diagram of the synchronous sealing mechanism of the present invention; Figure 6 It is a schematic cross-sectional structural diagram of the pressurizing mechanism of the present invention.

[0018] In the figure: 1. base; 2. propellant charge ejection mechanism; 21. rotating tube; 22. torsion spring; 23. gear; 24. branch pipe; 25. sealing cover; 3. composite solid propellant slurry containing and heating mechanism; 31. viscosity cup; 32. water bath; 4. outer shell; 5. driving mechanism; 51. reciprocating screw; 52. driving motor; 53. outer sleeve; 54. first return spring; 55. inner sleeve; 56. guide plate; 57. rack; 6. synchronous sealing mechanism; 61. top plate; 62. U-shaped frame; 63. sealing cover; 64. negative pressure tube; 7. pressurizing mechanism; 71. annular sealing shell; 72. transmission tube; 73. piston plate; 74. piston rod; 75. bottom plate; 76. second return spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides Figure 1-Figure 6 A composite solid propellant slurry flow rate test device shown includes a base 1, an electronic balance is arranged at the bottom of the inner side of the base 1, a propellant column disengagement mechanism 2 is arranged at the top of the inner side of the base 1, a composite solid propellant slurry containing and heating mechanism 3 and a shell 4 are arranged at the top of the base 1, the shell 4 is located outside the composite solid propellant slurry containing and heating mechanism 3 and is fixedly connected to the base 1, a driving mechanism 5 is arranged at the top of the inner side of the shell 4, a synchronous sealing mechanism 6 is arranged at the bottom end of the driving mechanism 5, and a pressurizing mechanism 7 is arranged on the outside; The driving mechanism 5 drives the synchronous sealing mechanism 6 to move downward, and the synchronous sealing mechanism 6 seals the top of the composite solid propellant slurry containing and heating mechanism 3 after moving downward. The driving mechanism 5 drives the propellant grain discharging mechanism 2 to rotate to release the blockage of the bottom of the composite solid propellant slurry containing and heating mechanism 3. When the driving mechanism 5 moves upward, it pushes the pressurizing mechanism 7, and the pressurizing mechanism 7 pressurizes the propellant grain discharging mechanism 2. The propellant grain discharging mechanism 2 synchronously pushes out multiple propellant grains inside the composite solid propellant slurry containing and heating mechanism 3.

[0021] like Figure 2 As shown, the propellant charge ejection mechanism 2 includes a rotating tube 21, a torsion spring 22, a gear 23, a branch pipe 24 and a sealing cover 25, wherein both ends of the rotating tube 21 respectively penetrate the inner wall of the base 1 and extend to the outside of the base 1, the rotating tube 21 is rotatably connected to the base 1 through a bearing, the torsion spring 22 and the gear 23 are sequentially sleeved from the inside to the outside and arranged at the outer end of the rotating tube 21, the torsion spring 22 is fixedly connected between the inner wall of the base 1 and the rotating tube 21, the gear 23 is fixedly connected to the rotating tube 21, a plurality of the branch pipes 24 and the sealing cover 25 are provided, a plurality of the branch pipes 24 are evenly fixedly connected to the front of the rotating tube 21, a plurality of the sealing covers 25 are respectively fixedly arranged at the ends of a plurality of the branch pipes 24, and a one-way valve is arranged inside the sealing cover 25.

[0022] By setting the above structure, after the rack 57 is meshed with the gear 23, as the rack 57 continues to move downward, the gear 23 drives the rotating tube 21 to rotate. When the rotating tube 21 rotates, it drives the branch pipe 24 and the sealing cover 25 to move away from the discharge port at the bottom of the viscosity cup 31, thereby avoiding affecting the subsequent dripping of the composite solid propellant slurry. At the same time, the one-way valve inside the sealing cover 25 can prevent the composite solid propellant slurry from flowing into the inner side of the sealing cover 25 from the discharge port at the bottom of the viscosity cup 31 after being added into the viscosity cup 31.

[0023] like Figure 3 As shown, the composite solid propellant slurry containing and heating mechanism 3 includes a viscosity cup 31 and a water bath 32, wherein a plurality of viscosity cups 31 are provided, and the plurality of viscosity cups 31 are evenly fixed and penetrated through the top of the base 1, and the water bath 32 is fixedly sleeved on the outside of the plurality of viscosity cups 31.

[0024] By setting the above structure, the propellant slurry can be loaded into the inner sides of the three viscosity cups 31 respectively, and the surface of the propellant slurry is flush with the inner edge of the viscosity cup 31. Hot water is input into the water bath 32 through the water inlet pipe on the water bath 32, and the hot water heats the three viscosity cups 31. The circulated hot water is output through the water outlet pipe on the water bath 32.

[0025] like Figure 4 As shown, the driving mechanism 5 includes a reciprocating screw 51, a driving motor 52, an outer sleeve 53, a first return spring 54, an inner sleeve 55, a guide plate 56 and a rack 57, wherein the reciprocating screw 51 passes through the top of the outer shell 4 and extends to the inner side of the outer shell 4, the driving motor 52 is fixedly arranged on the top of the outer shell 4 and is transmission-connected with the reciprocating screw 51, the outer sleeve 53, the first return spring 54 and the inner sleeve 55 are sequentially sleeved on the outer side of the driving motor 52 from top to bottom, the outer sleeve 53 is transmission-connected with the reciprocating screw 51, the first return spring 54 is fixedly connected between the outer sleeve 53 and the inner sleeve 55, the inner sleeve 55 is slidably connected with the reciprocating screw 51 and is slidably nested in the inner side of the outer sleeve 53 in the vertical direction, the guide plate 56 is fixedly sleeved on the top of the outer side of the outer sleeve 53, and the rack 57 is fixedly arranged at the bottom of the guide plate 56.

[0026] By setting the above structure, the driving motor 52 can drive the reciprocating screw 51 to rotate. When the reciprocating screw 51 rotates, it drives the outer sleeve 53 to descend. When the outer sleeve 53 descends, the first return spring 54 drives the inner sleeve 55 to descend, and the guide plate 56 drives the rack 57 to descend.

[0027] like Figure 5 As shown, the synchronous sealing mechanism 6 includes a top plate 61, a U-shaped frame 62, a sealing cover 63 and a negative pressure tube 64, wherein the U-shaped frame 62 is fixedly arranged at the bottom end of the inner sleeve 55, the top plate 61 is fixedly arranged at the bottom of the top plate 61, and a plurality of the sealing covers 63 and the negative pressure tube 64 are provided. The plurality of sealing covers 63 are respectively located directly above the plurality of viscosity cups 31 and are all fixedly arranged at the bottom of the top plate 61, and the plurality of negative pressure tubes 64 are respectively fixedly penetrated at the top of the plurality of sealing covers 63, and the plurality of negative pressure tubes 64 are all fixedly penetrated at the top of the top plate 61, and the input end of the negative pressure tube 64 is connected to a pressure generating device.

[0028] By setting the above structure, when the inner sleeve 55 descends, the top plate 61 is driven to descend through the U-shaped frame 62, and when the top plate 61 descends, the three sealing covers 63 are driven to descend synchronously, until the three sealing covers 63 are respectively covered on the tops of the three viscosity cups 31, thereby sealing the top openings of the three viscosity cups 31. At this time, due to the obstruction of the viscosity cups 31, the synchronous sealing mechanism 6 cannot continue to descend; In addition, during the flow rate test, the three viscosity cups 31 are pressurized by the pressure generating device connected to the negative pressure tube 64, providing a driving force for the propellant slurry inside the three viscosity cups 31 to flow downward, so that the propellant slurry drips onto the weighing paper through the discharge port at the bottom of the viscosity cup 31, and the electronic balance weighs the mass of the slurry on the weighing paper. The average mass of the slurry dripping from the three viscosity cups 31 on the weighing paper is obtained, which is the flow rate of the propellant slurry in the current sampling period.

[0029] like Figure 6 As shown, the pressurizing mechanism 7 includes an annular sealing shell 71, a transmission pipe 72, a piston plate 73, a piston rod 74, a bottom plate 75 and a second return spring 76, wherein the annular sealing shell 71 is located on the outside of the reciprocating screw 51 and is fixedly arranged on the top of the inner side of the outer shell 4, two transmission pipes 72 are provided, and the two transmission pipes 72 are respectively fixedly penetrated on both sides of the annular sealing shell 71 and are respectively connected to the two ends of the rotating tube 21 through a rotating joint, the piston plate 73 is slidably arranged on the inside of the annular sealing shell 71 along the vertical direction, the piston rod 74 is slidably penetrated at the bottom of the annular sealing shell 71 and is fixedly connected between the piston plate 73 and the bottom plate 75, and the second return spring 76 is sleeved on the outside of the piston rod 74.

[0030] By providing the above-mentioned propellant charge disengaging mechanism 2 and the pressurizing mechanism 7, after the top of the guide plate 56 is fitted with the bottom of the bottom plate 75, as the guide plate 56 continuously moves upward, the bottom plate 75 compresses the second return spring 76, and at the same time drives the piston plate 73 to continuously move upward inside the annular sealing shell 71 through the piston rod 74. During the upward movement of the piston plate 73, the air inside the annular sealing shell 71 is pushed, and the air inside the annular sealing shell 71 enters into the rotating tube 21 through the transmission pipe 72, and then enters into the viscosity cup 31 through the branch pipe 24 and the sealing cover 25, thereby pushing the propellant charge inside the viscosity cup 31 upward.

[0031] The present invention also discloses a composite solid propellant slurry flow rate testing method, which is implemented using the composite solid propellant slurry flow rate testing device described above, and the method specifically comprises the following steps: S1. The propellant slurry is respectively loaded into the inner sides of three viscosity cups 31, and the surface of the propellant slurry is flush with the inner edge of the viscosity cup 31. Hot water is input into the water bath 32 through the water inlet pipe on the water bath 32. The hot water heats the three viscosity cups 31. The circulated hot water is output through the water outlet pipe on the water bath 32. A weighing paper is placed on the top of the electronic balance. S2, start the driving motor 52, the driving motor 52 drives the reciprocating screw 51 to rotate, the reciprocating screw 51 drives the outer sleeve 53 to descend when rotating, the outer sleeve 53 drives the inner sleeve 55 to descend through the first return spring 54 when descending, drives the rack 57 to descend through the guide plate 56, the inner sleeve 55 drives the top plate 61 to descend through the U-shaped frame 62 when descending, and drives the three sealing covers 63 to descend synchronously when the top plate 61 descends; S3, when the outer sleeve 53 descends to a first threshold, the three sealing covers 63 cover the tops of the three viscosity cups 31 respectively, thereby sealing the top openings of the three viscosity cups 31. At this time, due to the obstruction of the viscosity cups 31, the synchronous sealing mechanism 6 cannot continue to descend. At the same time, as the outer sleeve 53 continues to descend, the inner sleeve 55 continues to compress the first return spring 54, and the guide plate 56 continues to drive the rack 57 to descend. S4, when the outer sleeve 53 descends to a second threshold, the rack 57 meshes with the gear 23, and as the rack 57 continues to move downward, the gear 23 drives the rotating tube 21 to rotate, and the rotating tube 21 drives the branch pipe 24 and the sealing cover 25 to move away from the bottom discharge port of the viscosity cup 31; S5, when the outer sleeve 53 descends to a third threshold, the rotating tube 21 drives the long end of the branch tube 24 to rotate to a vertical state, and at the same time, the outer sleeve 53 moves to the bottom of the reciprocating thread outside the driving motor 52, and the driving motor 52 is stopped at this time; S6. The three viscosity cups 31 are pressurized by the pressure generating device connected to the negative pressure tube 64 to provide a driving force for the propellant slurry in the three viscosity cups 31 to flow downward, so that the propellant slurry drips onto the weighing paper through the discharge port at the bottom of the viscosity cup 31. The mass of the slurry on the weighing paper is weighed by an electronic balance. The average mass of the slurry dripped onto the weighing paper from the three viscosity cups 31 is obtained, which is the flow rate of the propellant slurry in the current sampling period. The above operation is repeated multiple times until the average mass of the propellant slurry in the period is less than 1 g / min. S7, start the driving motor 52 again, and the driving motor 52 drives the reciprocating screw 51 to rotate again. When the reciprocating screw 51 rotates, the outer sleeve 53 is driven to move upward and reset. During the upward and reset process of the outer sleeve 53, the propellant column disengaging mechanism 2 and the synchronous sealing mechanism 6 are successively driven to reset. At this time, the top of the viscosity cup 31 is no longer sealed, and the sealing cover 25 is again sleeved on the outer side of the bottom discharge port of the viscosity cup 31; S8, when the upward movement distance of the outer sleeve 53 reaches the fourth threshold, the outer sleeve 53 drives the initial station, at which time the top of the guide plate 56 fits the bottom of the bottom plate 75, and subsequently as the guide plate 56 continues to move upward, the bottom plate 75 compresses the second return spring 76, and at the same time drives the piston plate 73 to continuously move upward inside the annular sealing shell 71 through the piston rod 74. During the upward movement of the piston plate 73, the air inside the annular sealing shell 71 is pushed, and the air inside the annular sealing shell 71 enters the rotating tube 21 through the transmission tube 72, and then enters the viscosity cup 31 through the branch pipe 24 and the sealing cover 25, thereby pushing the propellant grain inside the viscosity cup 31 upward; S9, when the upward movement distance of the outer sleeve 53 reaches the fifth threshold, the outer sleeve 53 moves to the top of the reciprocating thread outside the reciprocating screw 51, and the propellant pellets inside the viscosity cup 31 are pushed out from the top opening of the viscosity cup 31 under the action of pressure. Subsequently, as the reciprocating screw 51 continues to rotate, the outer sleeve 53 moves downward and resets, and the pressurizing mechanism 7 also gradually resets. S10, when the downward movement distance of the outer sleeve 53 reaches the sixth threshold, the outer sleeve 53 reaches the initial position again, and the driving motor 52 is stopped at this time.

[0032] It should also be noted that the first threshold, the second threshold and the third threshold increase in sequence, and the fourth threshold and the fifth threshold increase in sequence. At the same time, the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold and the sixth threshold are recorded for the convenience of accurately describing the actual working conditions of the scheme; When the solution of the present application is actually produced, according to the actual specifications of the reciprocating screw 51, the first threshold value, the second threshold value, the third threshold value, the fourth threshold value, the fifth threshold value and the sixth threshold value are all specific values.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite solid propellant slurry flow rate test device, characterized in that: The invention comprises a base (1), wherein an electronic balance is arranged at the bottom of the inner side of the base (1), a propellant charge ejection mechanism (2) is arranged at the top of the inner side of the base (1), a composite solid propellant slurry containing and heating mechanism (3) and a shell (4) are arranged at the top of the base (1), the shell (4) is located outside the composite solid propellant slurry containing and heating mechanism (3) and is fixedly connected to the base (1), a driving mechanism (5) is arranged at the top of the inner side of the shell (4), a synchronous sealing mechanism (6) is arranged at the bottom end of the driving mechanism (5), and a pressurizing mechanism (7) is arranged at the outer side; The driving mechanism (5) drives the synchronous sealing mechanism (6) to move downward, and after the synchronous sealing mechanism (6) moves downward, it seals the top of the composite solid propellant slurry containing and heating mechanism (3). The driving mechanism (5) drives the propellant grain ejection mechanism (2) to rotate, so as to release the blockage of the bottom of the composite solid propellant slurry containing and heating mechanism (3). When the driving mechanism (5) moves upward, it pushes the pressurizing mechanism (7), and the pressurizing mechanism (7) pressurizes the propellant grain ejection mechanism (2). The propellant grain ejection mechanism (2) ejects multiple propellant grains inside the composite solid propellant slurry containing and heating mechanism (3) synchronously.

2. A composite solid propellant slurry flow rate testing device according to claim 1, characterized in that: The propellant charge ejection mechanism (2) comprises a rotating tube (21), a torsion spring (22), a gear (23), a branch pipe (24) and a sealing cover (25); The two ends of the rotating tube (21) respectively penetrate the inner wall of the base (1) and extend to the outside of the base (1); the rotating tube (21) is rotatably connected to the base (1) via a bearing; the torsion spring (22) and the gear (23) are sequentially sleeved and arranged on the outer end of the rotating tube (21) from the inside to the outside; the torsion spring (22) is fixedly connected between the inner wall of the base (1) and the rotating tube (21); the gear (23) is fixedly connected to the rotating tube (21); a plurality of branch tubes (24) and sealing covers (25) are provided; the plurality of branch tubes (24) are evenly fixedly connected to the front of the rotating tube (21); the plurality of sealing covers (25) are respectively fixedly arranged at the ends of the plurality of branch tubes (24); and a one-way valve is provided inside the sealing cover (25).

3. A composite solid propellant slurry flow rate testing device according to claim 2, characterized in that: The composite solid propellant slurry containing and heating mechanism (3) comprises a viscosity cup (31) and a water bath (32); A plurality of viscosity cups (31) are provided, and the plurality of viscosity cups (31) are evenly fixed and penetrated through the top of the base (1), and the water bath box (32) is fixedly sleeved and provided on the outside of the plurality of viscosity cups (31).

4. A composite solid propellant slurry flow rate testing device according to claim 3, characterized in that: The driving mechanism (5) comprises a reciprocating screw (51), a driving motor (52), an outer sleeve (53), a first return spring (54), an inner sleeve (55), a guide plate (56) and a rack (57); The reciprocating screw (51) passes through the top of the outer shell (4) and extends to the inner side of the outer shell (4); the driving motor (52) is fixedly arranged on the top of the outer shell (4) and is transmission-connected to the reciprocating screw (51); the outer sleeve (53), the first return spring (54) and the inner sleeve (55) are sleeved and arranged on the outer side of the driving motor (52) in sequence from top to bottom; the outer sleeve (53) is transmission-connected to the reciprocating screw (51); the first return spring (54) is fixedly connected between the outer sleeve (53) and the inner sleeve (55); the inner sleeve (55) is slidably connected to the reciprocating screw (51) and is slidably nested and arranged on the inner side of the outer sleeve (53) in a vertical direction; the guide plate (56) is fixedly sleeved and arranged on the top of the outer side of the outer sleeve (53); and the rack (57) is fixedly arranged on the bottom of the guide plate (56).

5. A composite solid propellant slurry flow rate testing device according to claim 4, characterized in that: The synchronous sealing mechanism (6) comprises a top plate (61), a U-shaped frame (62), a sealing cover (63) and a negative pressure tube (64); The U-shaped frame (62) is fixedly arranged at the bottom end of the inner sleeve (55), the top plate (61) is fixedly arranged at the bottom of the top plate (61), a plurality of the sealing covers (63) and the negative pressure tube (64) are provided, the plurality of sealing covers (63) are respectively located directly above the plurality of viscosity cups (31) and are all fixedly arranged at the bottom of the top plate (61), the plurality of negative pressure tubes (64) are respectively fixedly arranged through the top of the plurality of sealing covers (63), the plurality of negative pressure tubes (64) are all fixedly arranged through the top of the top plate (61), and the input end of the negative pressure tube (64) is connected to a pressure generating device.

6. A composite solid propellant slurry flow rate testing device according to claim 5, characterized in that: The pressurizing mechanism (7) comprises an annular sealing housing (71), a transmission pipe (72), a piston plate (73), a piston rod (74), a bottom plate (75) and a second return spring (76); The annular sealing shell (71) is located outside the reciprocating screw (51) and is fixedly arranged on the top of the inner side of the housing (4). Two transmission pipes (72) are provided. The two transmission pipes (72) are respectively fixedly arranged on both sides of the annular sealing shell (71) and are respectively connected to the two ends of the rotating tube (21) through rotating joints. The piston plate (73) is slidably arranged inside the annular sealing shell (71) along the vertical direction. The piston rod (74) is slidably arranged at the bottom of the annular sealing shell (71) and is fixedly connected between the piston plate (73) and the bottom plate (75). The second return spring (76) is sleeved on the outside of the piston rod (74).

7. A composite solid propellant slurry flow rate test method, characterized in that: The composite solid propellant slurry flow rate testing device as claimed in claim 6 is used to implement the method, and the method specifically comprises the following steps: S1. The propellant slurry is respectively loaded into the inner sides of three viscosity cups (31), and the surface of the propellant slurry is flush with the inner edge of the viscosity cup (31). Hot water is input into the water bath (32) through the water inlet pipe on the water bath (32). The hot water heats the three viscosity cups (31). The circulated hot water is output through the water outlet pipe on the water bath (32). A weighing paper is placed on the top of the electronic balance. S2, starting the driving motor (52), the driving motor (52) drives the reciprocating screw (51) to rotate, the reciprocating screw (51) drives the outer sleeve (53) to descend when rotating, the outer sleeve (53) drives the inner sleeve (55) to descend through the first return spring (54), drives the rack (57) to descend through the guide plate (56), the inner sleeve (55) drives the top plate (61) to descend through the U-shaped frame (62), and the top plate (61) drives the three sealing covers (63) to descend synchronously when descending; S3, when the outer sleeve (53) descends a distance that reaches a first threshold, the three sealing covers (63) are respectively covered on the tops of the three viscosity cups (31), thereby sealing the top openings of the three viscosity cups (31). At this time, due to the obstruction of the viscosity cups (31), the synchronous sealing mechanism (6) cannot continue to descend. Subsequently, as the outer sleeve (53) continues to descend, the inner sleeve (55) continues to compress the first return spring (54), and the guide plate (56) continues to drive the rack (57) to descend; S4, when the outer sleeve (53) descends to a second threshold, the rack (57) meshes with the gear (23), and as the rack (57) continues to move downward, the gear (23) drives the rotating tube (21) to rotate, and the rotating tube (21) drives the branch tube (24) and the sealing cover (25) to move away from the bottom outlet of the viscosity cup (31); S5, when the descending distance of the outer sleeve (53) reaches a third threshold value, the rotating tube (21) drives the long end of the branch tube (24) to rotate to a vertical state, and at the same time, the outer sleeve (53) moves to the bottom end of the reciprocating thread outside the drive motor (52), and the drive motor (52) is stopped at this time; S6. The three viscosity cups (31) are pressurized by a pressure generating device connected to the negative pressure tube (64), providing a driving force for the propellant slurry in the three viscosity cups (31) to flow downward, so that the propellant slurry drips onto the weighing paper through the discharge port at the bottom of the viscosity cup (31), and the mass of the slurry on the weighing paper is weighed by an electronic balance. The average mass of the slurry dripped onto the weighing paper from the three viscosity cups (31) is obtained, which is the flow rate of the propellant slurry in the current sampling period. The above operation is repeated multiple times until the average mass of the propellant slurry in the period is less than 1 g / min. S7, the driving motor (52) is started again, and the driving motor (52) drives the reciprocating screw (51) to rotate again. When the reciprocating screw (51) rotates, it drives the outer sleeve (53) to move upward and reset. During the upward and reset process of the outer sleeve (53), the propellant column ejection mechanism (2) and the synchronous sealing mechanism (6) are successively reset. At this time, the top of the viscosity cup (31) is no longer sealed, and the sealing cover (25) is again sleeved on the outer side of the bottom discharge port of the viscosity cup (31); S8, when the upward movement distance of the outer sleeve (53) reaches the fourth threshold value, the outer sleeve (53) drives the initial working position, at which time the top of the guide plate (56) is in contact with the bottom of the bottom plate (75), and subsequently as the guide plate (56) continues to move upward, the bottom plate (75) compresses the second return spring (76), and at the same time drives the piston plate (73) to continuously move upward inside the annular sealing shell (71) through the piston rod (74). During the upward movement of the piston plate (73), the air inside the annular sealing shell (71) is pushed, and the air inside the annular sealing shell (71) enters the rotating tube (21) through the transmission tube (72), and then enters the viscosity cup (31) through the branch tube (24) and the sealing cover (25), thereby pushing the propellant grain inside the viscosity cup (31) upward; S9, when the upward movement distance of the outer sleeve (53) reaches the fifth threshold value, the outer sleeve (53) moves to the top of the reciprocating thread on the outer side of the reciprocating screw (51), and the propellant column inside the viscosity cup (31) is pushed out from the top opening of the viscosity cup (31) under the action of pressure. Subsequently, as the reciprocating screw (51) continues to rotate, the outer sleeve (53) moves downward and resets, and at the same time, the pressurizing mechanism (7) is gradually reset; S10: When the downward movement distance of the outer sleeve (53) reaches the sixth threshold value, the outer sleeve (53) reaches the initial working position again, and the driving motor (52) is stopped at this time.

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