A mud testing device and method for a gun-and-dip joint assembly

Abstract

The present application relates to a kind of spray and immersion type universal joint assembly mud test device and test method, belong to vehicle parts detection field.The present application includes workbench, its structural features are in that:still include hot-air box, mud tank, hot air mechanism, mud mechanism, drive mechanism and adjusting mechanism, the mud tank is arranged in hot-air box, the hot-air box is located between drive mechanism and adjusting mechanism, the hot-air box, drive mechanism and adjusting mechanism are all arranged on workbench, the drive mechanism is cooperated with adjusting mechanism, the hot-air box is connected with hot air mechanism, the mud tank is connected with mud mechanism;The drive mechanism includes drive seat and drive motor, the drive seat is arranged on workbench, and the drive motor is arranged on drive seat.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of spray and immersion type universal joint assembly mud test device and test method, belong to vehicle parts detection field. BACKGROUND

[0002] Universal joint is the machine part for realizing variable angle power transmission, used in the position needing to change the direction of transmission axis, it is the "joint" component of the universal transmission device of automobile and off-highway vehicle drive system, universal joint and transmission shaft combination, to meet power transmission, adapt to the angle change caused by steering and the up and down bounce generated when car runs, the drive axle of front drive car and off-highway vehicle, half shaft and axle are often connected by universal joint.

[0003] In the production and processing of universal joint, in order to ensure that the quality of universal joint meets the standard, and meet the use demand in harsh environment, universal joint is usually tested, and mud test is one of the main test of universal joint, in view of this, a universal joint assembly mud test device and test method are disclosed in the patent literature with application number 202411191351.5, the above prior art can only realize the test that mud flows along annular water tank 7 continuously, but cannot realize the test of spray and immersion mode, and the above prior art cannot test different models of universal joint. SUMMARY

[0004] The present application aims to overcome the above-mentioned deficiencies in the prior art, and provide a structure design reasonable spray and immersion type universal joint assembly mud test device and test method.

[0005] The technical scheme adopted by the present application to solve the above problems is: the spray and immersion type universal joint assembly mud test device, including workbench, its structural characteristics are: it further includes hot air box, mud tank, hot air feeding mechanism, mud feeding mechanism, driving mechanism and adjusting mechanism, the mud tank is arranged in the hot air box, the hot air box is located between the driving mechanism and the adjusting mechanism, the hot air box, the driving mechanism and the adjusting mechanism are all arranged on the workbench, the driving mechanism cooperates with the adjusting mechanism, the hot air box is connected with the hot air feeding mechanism, the mud tank is connected with the mud feeding mechanism;

[0006] The driving mechanism includes driving seat and driving motor, the driving seat is arranged on the workbench, and the driving motor is arranged on the driving seat.

[0007] The adjusting mechanism comprises a length adjusting seat, an angle adjusting seat, a length adjusting slide rail, an angle adjusting slide rail, a length locking bolt, an angle locking bolt and a bearing seat, the length adjusting seat is arranged on the workbench in sliding mode through the length adjusting slide rail, and the length adjusting seat is fixed with the workbench through the length locking bolt, the angle adjusting seat is arranged on the length adjusting seat in sliding mode through the angle adjusting slide rail, and the angle adjusting seat is fixed with the length adjusting seat through the angle locking bolt, and the bearing seat is arranged on the angle adjusting seat.

[0008] Further, the hot air box comprises a hot air box body, a hot air box cover and a first sludge discharge port, the hot air box body is arranged on the workbench, the hot air box cover is arranged on the top of the hot air box body, and the first sludge discharge port is arranged on the bottom of the hot air box body.

[0009] Further, the sludge box comprises a sludge box body, a sludge box cover and a second sludge discharge port, the sludge box body is arranged in the hot air box body, the sludge box cover is arranged on the top of the sludge box body, the second sludge discharge port is arranged on the bottom of the sludge box body, and the sludge discharge valve is arranged in the second sludge discharge port.

[0010] Further, the sludge box body can move in the hot air box body through the roller, and the sludge box body can be fixed with the hot air box body through the bolt locking.

[0011] Further, the hot air feeding mechanism comprises a hot air fan, an air outlet pipe and an air inlet pipe, one end of the air outlet pipe is connected with the top of the hot air box, the other end of the air outlet pipe is connected with the air inlet of the hot air fan, one end of the air inlet pipe is connected with the bottom of the hot air box, and the other end of the air inlet pipe is connected with the air outlet of the hot air fan.

[0012] Further, the sludge feeding mechanism comprises a sludge barrel, a sludge pump, a sludge inlet pipe, a flow meter, a sludge outlet pipe, a stirring motor and a sludge nozzle, the sludge barrel is connected with one end of the sludge inlet pipe, the other end of the sludge inlet pipe is connected with the sludge nozzle, the sludge pump and the flow meter are sequentially arranged on the sludge inlet pipe along the sludge flow direction, one end of the sludge outlet pipe is connected with the first sludge discharge port, the other end of the sludge outlet pipe is connected with the sludge barrel, and the stirring motor is arranged on the sludge barrel.

[0013] Further, another technical purpose of the present application is to provide a test method of the universal joint assembly slurry test device.

[0014] The above technical purpose of the present application is realized through the following technical scheme.

[0015] The test method of the universal joint assembly slurry test device is characterized in that the test method is a slurry immersion test method as follows,

[0016] S1, 2 mud nozzles are arranged on the upper left and right of each test piece, each mud nozzle sprays mud to the mud box at a flow rate of 10L / min, after the mud box is filled with mud, the spraying is stopped, and after the mud in the mud box reaches the set liquid level, the timing is started to ensure that the test piece is immersed in the mud, and the excess mud is discharged from the overflow port on the upper part of the mud box;

[0017] S2, after the test piece is immersed in the mud, the soaking experiment is carried out at a test speed of 400 rpm for 20 minutes, the bottom of the mud box is provided with a second mud discharge port, a mud discharge valve is arranged in the second mud discharge port, and the mud discharge valve is automatically opened to discharge the mud in the mud box back to the mud barrel;

[0018] S3, after the test piece is separated from the mud, the mud box cover is automatically opened, and the test piece is dried by 60-degree hot air circulation for 20 minutes; PTC + aluminum alloy hot air (blowing type) heating is adopted, the temperature is controllable, and the time is 20 minutes;

[0019] S4, after 20 minutes, the heating is turned off, then the test piece continues to rotate at 400 rpm for 20 minutes, one cycle is completed, and the next cycle is automatically entered, and a total of 400 cycles, that is, 400 hours.

[0020] Further, another technical purpose of the present application is to provide a test method of a spraying and immersion type universal joint assembly mud test device.

[0021] The above technical purpose of the present application is realized by the following technical scheme.

[0022] A test method of a spraying and immersion type universal joint assembly mud test device, characterized in that the test method is a mud spraying test method as follows,

[0023] S1, 2 mud nozzles are arranged on the upper left and right of each test piece, each mud nozzle sprays mud to the test piece at a flow rate of 10L / min, the test speed is 200 rpm, the test time is 120 hours, and during the 120 hours of spraying, the mud discharge valve at the bottom of the mud box is opened, and the mud is discharged to the hot air box and then back to the mud barrel;

[0024] S2, stop spraying, the mud box cover is automatically opened, and the test piece is dried by 60-degree hot air circulation for 8 hours;

[0025] S3, after 8 hours, the heating is turned off, then mud is sprayed again, the test speed is 500 rpm, and the test time is 20 hours;

[0026] S4, 20 hours end stop injection, mud tank cover is opened automatically, 60 degrees hot air circulation blow dry test piece, heating time 2 hours, a cycle period ends, automatically enters next cycle, total circulation test 2 cycles, namely 300 hours.

[0027] Compared with the prior art, the universal joint assembly mud test device has the following advantages: the universal joint assembly mud test device can realize mud injection test and mud immersion test when testing the universal joint assembly; the universal joint assembly mud test device can adjust the position of the adjusting mechanism according to the specifications and models of the universal joint assembly, so that one test device can test different universal joint assemblies, and the test cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a perspective structural schematic view of the universal joint assembly mud test device of the embodiment of the present application.

[0029] Figure 2 is a perspective structural schematic view of the universal joint assembly mud test device of the embodiment of the present application.

[0030] Figure 3 is a schematic view of the internal structure of the hot air box and the mud box of the embodiment of the present application.

[0031] Figure 4 is a perspective structural schematic view of the hot air box of the embodiment of the present application.

[0032] Figure 5 is a perspective structural schematic view of the hot air box of the embodiment of the present application.

[0033] Figure 6 is a perspective structural schematic view of the mud box of the embodiment of the present application.

[0034] Figure 7 is a perspective structural schematic view of the mud box of the embodiment of the present application.

[0035] Figure 8 is a schematic view of the internal structure of the universal joint assembly mud test device of the embodiment of the present application.

[0036] Figure 9 is a schematic view of the use state structure of the universal joint assembly mud test device of the embodiment of the present application.

[0037] In the figure: workbench 1, hot air box 2, mud box 3, hot air feeding mechanism 4, mud feeding mechanism 5, driving mechanism 6, adjusting mechanism 7, test piece 8,

[0038] hot air box body 21, hot air box cover 22, first mud discharge port 23,

[0039] mud box 31, mud box cover 32, second mud discharge port 33,

[0040] hot air blower 41, air outlet pipe 42, air inlet pipe 43,

[0041] mud bucket 51, mud pump 52, mud inlet pipe 53, flow meter 54, mud outlet pipe 55, stirring motor 56, mud nozzle 57,

[0042] drive base 61, drive motor 62,

[0043] length adjustment base 71, angle adjustment base 72, length adjustment sliding rail 73, angle adjustment sliding rail 74, length locking bolt 75, angle locking bolt 76, bearing seat 77. DETAILED DESCRIPTION

[0044] The application will be further described in conjunction with the accompanying drawings and by way of examples, which are intended to explain the application but not to limit the application to the following examples.

[0045] EXAMPLE

[0046] Referring to Figures 1 to 9 It is to be understood that the structures, proportions, sizes, etc. shown in the drawings accompanying the present specification are merely intended to facilitate the understanding of the content disclosed by the present specification for those skilled in the art to understand and read, and are not intended to limit the defined conditions under which the present application can be implemented, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that can be produced by the present application and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present application. Meanwhile, the terms such as "up", "down", "left", "right", "middle", and "one" in the present specification are merely intended to facilitate the understanding of the clearness of the description, and are not intended to limit the scope of the present application that can be implemented, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present application that can be implemented.

[0047] The mud test device of the combined jet and immersion universal joint assembly in the present embodiment comprises a workbench 1, a hot air box 2, a mud box 3, a hot air feeding mechanism 4, a mud feeding mechanism 5, a driving mechanism 6, and an adjusting mechanism 7. The mud box 3 is arranged in the hot air box 2, the hot air box 2 is located between the driving mechanism 6 and the adjusting mechanism 7, the hot air box 2, the driving mechanism 6, and the adjusting mechanism 7 are all arranged on the workbench 1, the driving mechanism 6 cooperates with the adjusting mechanism 7, the hot air box 2 is connected with the hot air feeding mechanism 4, and the mud box 3 is connected with the mud feeding mechanism 5.

[0048] The hot air box 2 in the embodiment comprises a hot air box body 21, a hot air box cover 22 and a first mud discharge port 23. The hot air box body 21 is arranged on the workbench 1. The hot air box cover 22 is arranged on the top of the hot air box body 21. The first mud discharge port 23 is arranged on the bottom of the hot air box body 21.

[0049] The mud box 3 in the embodiment comprises a mud box body 31, a mud box cover 32 and a second mud discharge port 33. The mud box body 31 is arranged in the hot air box body 21. The mud box cover 32 is arranged on the top of the mud box body 31. The second mud discharge port 33 is arranged on the bottom of the mud box body 31. A mud discharge valve is arranged in the second mud discharge port 33. The mud box body 31 can move in the hot air box body 21 through rollers. The mud box body 31 can be fixed with the hot air box body 21 through bolts.

[0050] The hot air feeding mechanism 4 in the embodiment comprises a hot air fan 41, an air outlet pipe 42 and an air inlet pipe 43. One end of the air outlet pipe 42 is connected with the top of the hot air box 2. The other end of the air outlet pipe 42 is connected with the air inlet of the hot air fan 41. One end of the air inlet pipe 43 is connected with the bottom of the hot air box 2. The other end of the air inlet pipe 43 is connected with the air outlet of the hot air fan 41.

[0051] The mud feeding mechanism 5 in the embodiment comprises a mud barrel 51, a mud pump 52, a mud inlet pipe 53, a flow meter 54, a mud outlet pipe 55, a stirring motor 56 and a mud nozzle 57. The mud barrel 51 is connected with one end of the mud inlet pipe 53. The other end of the mud inlet pipe 53 is connected with the mud nozzle 57. The mud pump 52 and the flow meter 54 are arranged on the mud inlet pipe 53 in sequence along the direction of mud flow. One end of the mud outlet pipe 55 is connected with the first mud discharge port 23. The other end of the mud outlet pipe 55 is connected with the mud barrel 51. The stirring motor 56 is arranged on the mud barrel 51.

[0052] The driving mechanism 6 in the embodiment comprises a driving seat 61 and a driving motor 62. The driving seat 61 is arranged on the workbench 1. The driving motor 62 is arranged on the driving seat 61. The adjusting mechanism 7 comprises a length adjusting seat 71, an angle adjusting seat 72, a length adjusting slide rail 73, an angle adjusting slide rail 74, a length locking bolt 75, an angle locking bolt 76 and a bearing seat 77. The length adjusting seat 71 is slidingly arranged on the workbench 1 through the length adjusting slide rail 73. The length adjusting seat 71 is fixed with the workbench 1 through the length locking bolt 75. The angle adjusting seat 72 is slidingly arranged on the length adjusting seat 71 through the angle adjusting slide rail 74. The angle adjusting seat 72 is fixed with the length adjusting seat 71 through the angle locking bolt 76. The bearing seat 77 is arranged on the angle adjusting seat 72.

[0053] The test method of the mud test device of the combined jetting and immersion type universal joint assembly in the embodiment is the mud immersion test method, as follows:

[0054] S1, 2 mud nozzles 57 are arranged on the upper left and right of each test piece 8, and each mud nozzle 57 sprays mud to the mud box 31 at a flow rate of 10L / min. After the mud fills the mud box 31, the spraying is stopped. After the mud in the mud box 31 reaches the set liquid level, the timing is started to ensure that the test piece 8 is immersed in the mud. The excess mud is discharged from the overflow port on the upper part of the mud box 31;

[0055] S2, after the test piece 8 is immersed in the mud, the soaking experiment is carried out at a test speed of 400 rpm for 20 minutes. The mud box 31 has a second mud discharge port 33 at the bottom. The second mud discharge port 33 is provided with a mud discharge valve which is automatically opened to discharge the mud in the mud box 31 back to the mud barrel 51;

[0056] S3, after the test piece 8 is separated from the mud, the mud box cover 32 is automatically opened, and the test piece 8 is dried by 60-degree hot air circulation. PTC + aluminum alloy hot air (blowout type) heating is adopted, and the temperature is controllable. The time is 20 minutes;

[0057] S4, after 20 minutes, the heating is turned off, and then the test piece 8 continues to rotate at 400 rpm for 20 minutes. One cycle is completed, and the next cycle is automatically entered. A total of 400 cycles, i.e. 400 hours, are completed.

[0058] The test method of the mud test device for the combined spraying and immersion type universal joint assembly in the embodiment is a mud spraying test method, as follows:

[0059] S1, 2 mud nozzles 57 are arranged on the upper left and right of each test piece 8, and each mud nozzle 57 sprays mud to the test piece 8 at a flow rate of 10L / min. The test speed is 200 rpm, and the test time is 120 hours. During the 120-hour spraying process, the mud discharge valve at the bottom of the mud box 31 is opened, and the mud is discharged to the hot air box 21 and then back to the mud barrel 51;

[0060] S2, stop spraying, and the mud box cover 32 is automatically opened. The test piece 8 is dried by 60-degree hot air circulation. The heating time is 8 hours;

[0061] S3, after 8 hours, the heating is turned off, and then the mud is sprayed again. The test speed is 500 rpm, and the test time is 20 hours;

[0062] S4, after 20 hours, the spraying is stopped, the mud box cover 32 is automatically opened, and the test piece 8 is dried by 60-degree hot air circulation. The heating time is 2 hours. One cycle is completed, and the next cycle is automatically entered. A total of 2 cycles, i.e. 300 hours, are completed.

[0063] Specifically, the mud test device for the universal joint assembly can realize mud immersion test and mud spray test. Before the test, the test piece 8 (i.e. the universal joint assembly) is installed in the mud box 31, so that one end of the test piece 8 is connected with the motor shaft of the driving motor 62 through a transmission shaft, and the other end of the test piece 8 is connected with the bearing seat 77 through a transmission shaft.

[0064] By adjusting the length adjustment seat 71 to move on the length adjustment slide rail 73, different specifications of the test piece 8 can be tested. After the length adjustment is completed, the length locking bolt 75 can be used to fix it. By adjusting the angle adjustment seat 72 to move on the angle adjustment slide rail 74, the angle of the test piece 8 can be adjusted. After the angle adjustment is completed, the angle locking bolt 76 can be used to fix it.

[0065] I. Technical requirements of the mud test device for the universal joint assembly:

[0066] 1. As shown in the mud test device, Figure 9 the installation angle of 7°-15°, the installation distance of 400-600mm, and the simultaneous testing of 2 test pieces 8 can be realized.

[0067] 2. The input end base of the mud test device is fixed, and the position of the output end base can be adjusted in the left-right direction (along the angle adjustment slide rail 74) and the front-rear direction (along the length adjustment slide rail 73) to realize the required installation angle and installation distance.

[0068] 3. The flange interface at both ends of the mud test device can adopt a light hole with a diameter of 32mm, and 2 M10 threaded holes need to be machined on the side surface.

[0069] When the mud test device for the universal joint assembly is used for mud immersion test, the parameters are as shown in the following table:

[0070]

[0071] Note: The whole test piece 8 needs to be immersed in the mud.

[0072] When the mud test device for the universal joint assembly is used for mud spray test, the parameters are as shown in the following table:

[0073]

[0074] Note: The mud nozzle 57 needs to spray mud on the test piece 8.

[0075] II. Mud circulation scheme

[0076] Mud immersion test scheme:

[0077] 1、Independent mud barrel 51, can be fully stirred by stirring motor 56, arranged at the lower end, the maximum flow of each mud nozzle 57 can reach 10L / min, (spraying cycle control).

[0078] 2, the drive motor 62 is arranged on the workbench 1, the input end is fixed through the drive seat 61, and the bearing seat 77 at the output end can adjust the distance and the translation distance angle, (motor cycle control).

[0079] 3, the hot air box 21 is arranged on the workbench 1, the mud box 31 is sleeved in the hot air box 21, the hot air box 21 can realize closed space, and the design can be heated to 60 degrees; the second mud discharge port 33 below the hot air box 21 can return the mud to the mud tank.

[0080] 4, the mud box cover 32 is designed to be sealed through two oil seals, which considers that the center distance of different test pieces 8 produces inconsistent translation distance (considering the center distance of 57, 7° angle, and the center distance of 94 and 15° angle), how to seal without interference, the mud box 31 can be adjusted in height or front and back.

[0081] The mud nozzle 57 is arranged on the top side of the mud box 31, mud is sprayed into the mud box 31 through a certain flow, so as to ensure that the test piece 8 is immersed in the mud, and the excess mud is discharged from the upper gap of the mud box 31.

[0082] After the immersion mud experiment is ended for 20 minutes, the mud discharge valve is configured in the second mud discharge port 33 at the bottom of the mud box 31, the mud discharge valve is automatically opened and discharged to the hot air box 21, and finally returns to the mud tank 51, (mud discharge and closing time cycle control).

[0083] Then the mud box cover 32 is opened, (mud box cover 32 opening and closing time control).

[0084] Start the heating system to 60 degrees, and the heating time is 20 minutes (heating time cycle control).

[0085] After 20 minutes, the heating is turned off, and then the test piece 8 continues to rotate for 20 minutes, so that a cycle period is ended, and the next cycle is automatically entered.

[0086] Mud spraying test scheme: that is, the scheme is a simplified version of the mud immersion test scheme, that is, the mud discharge valve in the first mud discharge port (23) is in a normal opening mode, but it is ensured that the mud nozzle 57 can spray the test piece 8.

[0087] The mud test device adopts 10.2 full-color resistive, HMI for man-machine interaction, control, display, adopts PTC + aluminum alloy hot air (blowout type) heating, temperature is controllable, default built-in preset test cycle A (immersion) / B (spray) two test schemes, real-time display of current progress, steps (maximum 9 steps), time, speed, cycle number can be edited. Meet the universal joint mud immersion and mud spray test test function.

[0088] In addition, it should be noted that the specific embodiments described in the specification, the shape of the zero, the components, the name taken, etc. can be different, the above described in the specification is only an example of the structure of the present application. Any equivalent changes or simple changes made according to the structure, features and principles described in the patent concept of the present application are included in the protection scope of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as it does not deviate from the structure of the present application or beyond the scope defined by the present claims, which shall belong to the protection scope of the present application.

Claims

1. A jetting and immersion universal joint assembly mud test device, comprising a workbench (1), characterized in that: It also includes a hot air box (2), a mud box (3), a hot air supply mechanism (4), a mud supply mechanism (5), a driving mechanism (6) and an adjusting mechanism (7), wherein the mud box (3) is arranged in the hot air box (2), the hot air box (2) is located between the driving mechanism (6) and the adjusting mechanism (7), the hot air box (2), the driving mechanism (6) and the adjusting mechanism (7) are all arranged on the workbench (1), the driving mechanism (6) cooperates with the adjusting mechanism (7), the hot air box (2) is connected to the hot air supply mechanism (4), and the mud box (3) is connected to the mud supply mechanism (5); The driving mechanism (6) comprises a driving seat (61) and a driving motor (62), wherein the driving seat (61) is arranged on the workbench (1), and the driving motor (62) is arranged on the driving seat (61); The adjusting mechanism (7) comprises a length adjusting seat (71), an angle adjusting seat (72), a length adjusting slide rail (73), an angle adjusting slide rail (74), a length locking bolt (75), an angle locking bolt (76) and a bearing seat (77); the length adjusting seat (71) is slidably arranged on the workbench (1) via the length adjusting slide rail (73), and the length adjusting seat (71) is fixed to the workbench (1) via the length locking bolt (75); the angle adjusting seat (72) is slidably arranged on the length adjusting seat (71) via the angle adjusting slide rail (74), and the angle adjusting seat (72) is fixed to the length adjusting seat (71) via the angle locking bolt (76); and the bearing seat (77) is arranged on the angle adjusting seat (72); The hot air box (2) comprises a hot air box body (21), a hot air box cover (22) and a first mud discharge port (23); the hot air box body (21) is arranged on a workbench (1); the hot air box cover (22) is arranged on the top of the hot air box body (21); and the first mud discharge port (23) is arranged on the bottom of the hot air box body (21); The mud box (3) comprises a mud box body (31), a mud box cover (32) and a second mud discharge port (33); the mud box body (31) is arranged in the hot air box body (21); the mud box cover (32) is arranged at the top of the mud box body (31); the second mud discharge port (33) is arranged at the bottom of the mud box body (31); and a mud discharge valve is installed in the second mud discharge port (33); The mud delivery mechanism (5) comprises a mud barrel (51), a mud pump (52), a mud inlet pipe (53), a flow meter (54), a mud outlet pipe (55), a stirring motor (56) and a mud nozzle (57). The mud barrel (51) is connected to one end of the mud inlet pipe (53), and the other end of the mud inlet pipe (53) is connected to the mud nozzle (57). The mud pump (52) and the flow meter (54) are sequentially arranged on the mud inlet pipe (53) along the mud flow direction. One end of the mud outlet pipe (55) is connected to the first row of mud ports (23), and the other end of the mud outlet pipe (55) is connected to the mud barrel (51). The mud barrel (51) is provided with a stirring motor (56).

2. The combined jetting and immersion mud testing device for universal joint assembly according to claim 1, characterized in that: The mud box (31) can be moved in the hot air box (21) via rollers, and the mud box (31) can be fixed to the hot air box (21) by locking with bolts.

3. The combined jetting and immersion mud testing device for universal joint assembly according to claim 1, characterized in that: The hot air supply mechanism (4) comprises a hot air blower (41), an air outlet pipe (42) and an air inlet pipe (43), one end of the air outlet pipe (42) is connected to the top of the hot air box (2), the other end of the air outlet pipe (42) is connected to the air inlet of the hot air blower (41), one end of the air inlet pipe (43) is connected to the bottom of the hot air box (2), and the other end of the air inlet pipe (43) is connected to the air outlet of the hot air blower (41).

4. A test method for a combined jet and immersion universal joint assembly mud test device according to any one of claims 1 to 3, characterized in that: The test method is the immersion slurry test method as follows: S1. A mud nozzle (57) is provided on the left and right of the upper portion of the test piece (8). Each mud nozzle (57) sprays mud into the mud box (31) at a flow rate of 10 L / min. When the mud fills the mud box (31), the spraying stops. When the mud accumulated in the mud box (31) reaches the set liquid level, the timing starts to ensure that the test piece (8) is immersed in the mud. The excess mud is discharged from the overflow port on the upper portion of the mud box (31); S2, after the test piece (8) is immersed in the mud, it starts to rotate at a fixed speed. A second mud discharge port (33) is provided at the bottom of the mud box (31). A mud discharge valve is provided in the second mud discharge port (33). After the mud immersion cycle time is completed, the mud discharge valve is automatically opened to discharge the mud into the mud box (31) and finally return to the mud bucket (51); S3. After the test piece (8) is separated from the mud, the mud box cover (32) automatically opens, and hot air circulates to dry the test piece (8), and the temperature is controllable; S4, the heating is turned off, and then the test piece (8) continues to rotate at a fixed speed. One cycle ends and the next cycle is automatically entered.

5. A test method for a combined jet and immersion universal joint assembly mud test device according to any one of claims 1 to 3, characterized in that: The test method is the mud spray test method as follows: S1. A mud nozzle (57) is provided on the left and right of the upper portion of the test piece (8). Each mud nozzle (57) sprays mud toward the test piece (8). During the spraying process, the test piece (8) rotates at a fixed speed. At the same time, the mud discharge valve at the bottom of the mud box (31) is always open, and the mud is discharged to the hot air box (21) and then flows back to the mud barrel (51). S2, stop spraying, the mud box cover (32) automatically opens, and hot air circulates to dry the test piece (8); S3, heating is turned off, and then the slurry is sprayed again, while the test piece (8) rotates at a fixed speed; S4. Stop spraying, the mud box cover (32) automatically opens, and the test piece (8) is dried by hot air. One cycle ends and the next cycle automatically begins.

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