Slurry test device and test method for jet and immersion type universal joint assembly

Abstract

The invention relates to a mud test device and test method for an injection and immersion type universal joint assembly, and belongs to the field of vehicle part detection. The device comprises a workbench and is structurally characterized by further comprising a hot air box, a slurry box, a hot air supply mechanism, a slurry supply mechanism, a driving mechanism and an adjusting mechanism, the slurry box is arranged in the hot air box, the hot air box is located between the driving mechanism and the adjusting mechanism, and the hot air box, the driving mechanism and the adjusting mechanism are all arranged on the workbench; the driving mechanism is matched with the adjusting mechanism, the hot air box is connected with the hot air supply mechanism, and the slurry box is connected with the slurry supply mechanism. The driving mechanism comprises a driving seat and a driving motor, the driving seat is arranged on the workbench, and the driving motor is arranged on the driving seat.

Description

Technical Field

[0001] The invention relates to a jetting and immersion universal joint assembly mud test device and test method, belonging to the field of vehicle parts detection. Background Art

[0002] The universal joint is a component that realizes variable-angle power transmission and is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" component of the universal joint device of the automobile and off-road vehicle drive system. The universal joint is combined with the drive shaft to meet the power transmission and adapt to the angle changes caused by the up and down bounces generated when the car is running. The drive axle, half shaft and wheel axle of front-drive automobiles and off-road vehicles are often connected by universal joints.

[0003] During the production and processing of universal joints, in order to ensure that the quality of the universal joints meets the standards and meet the requirements of use in harsh environments, it is usually necessary to carry out corresponding tests on the universal joints, among which the mud and water test is one of the main tests for the universal joints. In view of this, a mud and water test device and a test method for a universal joint assembly are disclosed in the patent document with application number 202411191351.5. The above-mentioned prior art can only realize the test of continuous flow of mud and water along the annular water tank 7, but cannot realize the test of spraying and immersion. At the same time, the above-mentioned prior art cannot test different models of universal joints. Summary of the invention

[0004] The object of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a mud test device and a test method for a universal joint assembly with both injection and immersion and a reasonable structural design.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is: the combined injection and immersion universal joint assembly mud test device includes a workbench, and its structural characteristics are: it also includes a hot air box, a mud box, a hot air delivery mechanism, a mud delivery mechanism, a driving mechanism and an adjusting mechanism, the mud box 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 to the hot air delivery mechanism, and the mud box is connected to the mud delivery mechanism; The driving mechanism comprises a driving seat and a driving motor, wherein the driving seat is arranged on a workbench, and the driving motor is arranged on the driving seat; The adjustment mechanism includes a length adjustment seat, an angle adjustment seat, a length adjustment slide rail, an angle adjustment slide rail, a length locking bolt, an angle locking bolt and a bearing seat. The length adjustment seat is slidably set on the workbench through the length adjustment slide rail, and the length adjustment seat is fixed to the workbench through the length locking bolt. The angle adjustment seat is slidably set on the length adjustment seat through the angle adjustment slide rail, and the angle adjustment seat is fixed to the length adjustment seat through the angle locking bolt. The bearing seat is set on the angle adjustment seat.

[0006] Furthermore, the hot air box includes a hot air box body, a hot air box cover and a first mud discharge port, the hot air box body is arranged on a workbench, the hot air box cover is arranged on the top of the hot air box body, and the first mud discharge port is arranged on the bottom of the hot air box body.

[0007] Furthermore, the mud box includes a mud box body, a mud box cover and a second mud discharge port. The mud box body is arranged in the hot air box body, the mud box cover is arranged on the top of the mud box body, the second mud discharge port is arranged at the bottom of the mud box body, and a mud discharge valve is installed in the second mud discharge port.

[0008] Furthermore, the mud box body can be moved in the hot air box body by rollers, and the mud box body and the hot air box body can be fixed by bolts.

[0009] Furthermore, the hot air supply mechanism includes a hot air blower, an air outlet pipe and an air inlet pipe, one end of the air outlet pipe is connected to the top of the hot air box, the other end of the air outlet pipe is connected to the air inlet of the hot air blower, one end of the air inlet pipe is connected to the bottom of the hot air box, and the other end of the air inlet pipe is connected to the air outlet of the hot air blower.

[0010] Furthermore, the mud delivery mechanism includes a mud barrel, a mud pump, a mud inlet pipe, a flow meter, a mud outlet pipe, a stirring motor and a mud nozzle. The mud barrel is connected to one end of the mud inlet pipe, and the other end of the mud inlet pipe is connected to the mud nozzle. The mud pump and the flow meter are sequentially arranged on the mud inlet pipe along the mud flow direction. One end of the mud outlet pipe is connected to the first row of mud ports, and the other end of the mud outlet pipe is connected to the mud barrel. The mud barrel is provided with a stirring motor.

[0011] Furthermore, another technical purpose of the present invention is to provide a testing method for a universal joint assembly mud testing device that combines both injection and immersion.

[0012] The above technical objectives of the present invention are achieved through the following technical solutions.

[0013] A test method for a jet and immersion universal joint assembly mud test device, the characteristics of which are: the test method is a mud immersion test method as follows, A mud nozzle is set on the left and right of the upper part of S1 and 2 test pieces. Each mud nozzle sprays mud into the mud box at a flow rate of 10L / min. When the mud fills the mud box, the spraying stops. When the mud accumulated in the mud box reaches the set liquid level, the timing starts 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. S2. After the test piece is immersed in the mud, the immersion test is carried out at a speed of 400 rpm for 20 minutes. There is a second mud discharge port at the bottom of the mud box. A mud discharge valve is provided in the second mud discharge port. The mud discharge valve is automatically opened to discharge the mud into the mud box and finally return to the mud bucket. S3. After leaving the mud, the mud box cover opens automatically, and the test piece is dried by 60-degree hot air circulation, using PTC + aluminum alloy hot air (blowing type) heating, with controllable temperature, for 20 minutes; S4. When 20 minutes have passed, the heating is turned off, and then the test piece continues to rotate at 400 rpm for 20 minutes. One cycle ends and it automatically enters the next cycle. A total of 400 cycles, or 400 hours, are required.

[0014] Furthermore, another technical purpose of the present invention is to provide a testing method for a mud testing device for a universal joint assembly that combines both injection and immersion.

[0015] The above technical objectives of the present invention are achieved through the following technical solutions.

[0016] A test method for a jet and immersion universal joint assembly mud test device, characterized in that: the test method is a mud jet test method as follows: A mud nozzle is set on the left and right of the upper part of the S1 and 2 test pieces. Each mud nozzle sprays mud to the test piece at a flow rate of 10L / min. The test speed is 200rpm and the test time is 120 hours. During the 120-hour spraying process, the mud discharge valve at the bottom of the mud box is opened, and the mud is discharged to the hot air box and returned to the mud barrel; S2, stop spraying, the mud box cover opens automatically, and the test piece is dried by hot air circulation at 60 degrees, and the heating time is 8 hours; S3, after 8 hours, the heating is turned off, and then the mud is sprayed again, the test speed is 500rpm, and the test time is 20 hours; S4. After 20 hours, the spraying is stopped, the mud box cover is automatically opened, and the test piece is dried by 60-degree hot air circulation. The heating time is 2 hours. After one cycle is completed, it automatically enters the next cycle. The total cycle test is 2 cycles, that is, 300 hours.

[0017] Compared with the prior art, the present invention has the following advantages: the mud test device for the universal joint assembly can be used to implement a mud injection test and a mud immersion test when testing the universal joint assembly; the mud test device for the universal joint assembly can also adjust the position of the adjustment mechanism according to the specifications and models of the universal joint assembly, and one test device can be used to test different universal joint assemblies, thereby reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a mud test device for a universal joint assembly according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of a mud test device for a universal joint assembly according to an embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the internal structure of a hot air box and a mud box according to an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the hot air box according to an embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the hot air box according to an embodiment of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the mud box according to an embodiment of the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the mud box according to an embodiment of the present invention.

[0025] Figure 8 It is a schematic diagram of the internal structure of a mud test device for a universal joint assembly according to an embodiment of the present invention.

[0026] Fig. 9 It is a schematic structural diagram of the use state of the mud testing device of the universal joint assembly according to an embodiment of the present invention.

[0027] In the figure: workbench 1, hot air box 2, mud box 3, hot air delivery mechanism 4, mud delivery mechanism 5, driving mechanism 6, adjusting mechanism 7, test piece 8, Hot air box body 21, hot air box cover 22, first mud discharge port 23, Mud box body 31, mud box cover 32, second row mud port 33, Hot air blower 41, air outlet pipe 42, air inlet pipe 43, Mud barrel 51, mud pump 52, mud inlet pipe 53, flow meter 54, mud outlet pipe 55, stirring motor 56, mud nozzle 57, Driving seat 61, driving motor 62, Length adjustment seat 71 , angle adjustment seat 72 , length adjustment slide rail 73 , angle adjustment slide rail 74 , length locking bolt 75 , angle locking bolt 76 , bearing seat 77 . DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0029] Example

[0030] See also Figures 1 to 9 As shown, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, if there are references to terms such as "upper", "lower", "left", "right", "middle" and "one" in this specification, they are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0031] The combined injection and immersion universal joint assembly mud test device in this embodiment includes a workbench 1, a hot air box 2, a mud box 3, a hot air delivery mechanism 4, a mud delivery mechanism 5, a driving mechanism 6 and an adjusting mechanism 7. The mud box 3 is arranged in the hot air box 2, and 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 delivery mechanism 4, and the mud box 3 is connected to the mud delivery mechanism 5.

[0032] The hot air box 2 in this embodiment includes 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, and the first mud discharge port 23 is arranged at the bottom of the hot air box body 21.

[0033] The mud box 3 in this embodiment includes 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, and the second mud discharge port 33 is arranged at the bottom of the mud box body 31. A mud discharge valve is installed in the second mud discharge port 33. The mud box body 31 can be moved in the hot air box body 21 by rollers, and the mud box body 31 can be fixed to the hot air box body 21 by bolts.

[0034] The hot air supply mechanism 4 in this embodiment includes 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.

[0035] The mud delivery mechanism 5 in this embodiment includes 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.

[0036] The driving mechanism 6 in this embodiment includes a driving seat 61 and a driving motor 62. 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 includes 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 through the length adjusting slide rail 73, and the length adjusting seat 71 is fixed to the workbench 1 through the length locking bolt 75, the angle adjusting seat 72 is slidably arranged on the length adjusting seat 71 through the angle adjusting slide rail 74, and the angle adjusting seat 72 is fixed to the length adjusting seat 71 through the angle locking bolt 76, and the bearing seat 77 is arranged on the angle adjusting seat 72.

[0037] The test method of the combined jet and immersion universal joint assembly mud test device in this embodiment is a mud immersion test method, as follows: A mud nozzle 57 is provided on the left and right of the upper part of the S1 and 2 test pieces 8, and each mud nozzle 57 sprays mud into the mud box 31 at a flow rate of 10L / 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, and the excess mud is discharged from the overflow port at the upper part of the mud box 31; S2, after the test piece 8 is immersed in the mud, an immersion test is carried out at a speed of 400 rpm for 20 minutes. 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. The mud discharge valve is automatically opened to discharge the mud into the mud box 31 and finally return to the mud barrel 51. S3. After being separated from the mud, the mud box cover 32 is automatically opened, and the test piece 8 is dried by hot air circulation at 60 degrees, using PTC + aluminum alloy hot air (blowing type) heating, with controllable temperature, for 20 minutes; S4. When 20 minutes have passed, the heating is turned off, and then the test piece 8 continues to rotate at 400 rpm for 20 minutes. One cycle ends and the next cycle automatically begins. A total of 400 cycles, or 400 hours, are performed.

[0038] The test method of the combined jetting and immersion universal joint assembly mud test device in this embodiment is a mud jetting test method, as follows: S1, A mud nozzle 57 is set on the left and right of the upper part of the 2 test pieces 8, and each mud nozzle 57 sprays mud to the test piece 8 at a flow rate of 10L / min. The test speed is 200rpm 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 flows back to the mud barrel 51; S2, stop spraying, the mud box cover 32 automatically opens, and the test piece 8 is dried by hot air circulation at 60 degrees, and the heating time is 8 hours; S3, after 8 hours, the heating is turned off, and then the mud is sprayed again, the test speed is 500rpm, and the test time is 20 hours; 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. After one cycle is completed, the next cycle is automatically entered. The total cycle test is 2 cycles, that is, 300 hours.

[0039] Specifically, the mud immersion test and mud spraying test can be realized by using the combined injection and immersion universal joint assembly mud testing device. 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 to the motor shaft of the drive motor 62 through a transmission shaft, and the other end of the test piece 8 is connected to the bearing seat 77 through a transmission shaft.

[0040] By adjusting the length adjustment seat 71 to move on the length adjustment slide rail 73, test pieces 8 of different specifications can be tested. After the length adjustment is completed, it can be fixed by the length locking bolt 75. 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, it can be fixed by the angle locking bolt 76.

[0041] 1. Technical requirements for the jet and immersion universal joint assembly mud test device: 1. Mud test equipment such as Fig. 9As shown, it should be possible to achieve an installation angle of 7°-15°, an installation distance of 400-600 mm, and simultaneous testing of two test pieces 8.

[0042] 2. The input end base of the mud test device is fixed, and the output end base position can be adjusted in the left-right direction (along the angle adjustment slide rail 74) and the front-back direction (along the length adjustment slide rail 73) to achieve the required installation angle and installation distance.

[0043] 3. The flange interfaces at both ends of the mud test device can use clear holes with a diameter of 32mm, and two M10 threaded holes need to be processed on the side.

[0044] When the mud test device for the universal joint assembly is used for the mud immersion test, the parameters are shown in the following table: Note: The entire test piece 8 needs to be immersed in the mud.

[0045] When the universal joint assembly mud test device is used to perform the mud spray test method, the parameters are shown in the following table: Note: The mud nozzle 57 is required to spray mud toward the test piece 8.

[0046] 2. Mud circulation scheme description Slurry test plan: 1. An independent mud barrel 51 can fully stir the mud through a stirring motor 56, which is arranged at the lower end and can reach a maximum injection capacity of 10L / min for each mud nozzle 57 (injection cycle control).

[0047] 2. A driving motor 62 is arranged on the workbench 1, the input end is fixed by the driving seat 61, and the bearing seat 77 at the output end can adjust the distance and translation distance and angle (motor cycle control).

[0048] 3. A hot air box 21 is arranged on the workbench 1, and a mud box 31 is installed inside the hot air box 21. The hot air box 21 can realize a closed space with a heating design of 60 degrees; a second row of mud ports 33 are arranged at the bottom of the hot air box 21 to return the mud to the mud tank.

[0049] 4. The mud box cover 32 is designed to seal the test piece oil seal block through the oil seals on both sides. Here, the center distances of different test pieces 8 produce inconsistent translation distances (considering 57 center distance, 7° angle, and 94 center distance and 15° angle). How to seal without interference, the mud box body 31 can be adjusted in height or front and back.

[0050] A mud nozzle 57 is arranged on the top side of the mud box 31 to spray mud into the mud box 31 at a certain flow rate to ensure that the test piece 8 is immersed in the mud, and excess mud is discharged from the upper notch of the mud box 31.

[0051] After the mud immersion experiment is completed for 20 minutes, a mud discharge valve is arranged in the second mud discharge port 33 at the bottom of the mud box 31, and the mud discharge valve is automatically opened to discharge the mud to the hot air box 21 and finally return to the mud barrel 51 (mud discharge and closing time cycle control).

[0052] Then the mud box cover 32 is opened (the opening and closing time of the mud box cover 32 is controlled).

[0053] Start the heating system to 60 degrees and heat for 20 minutes (heating time cycle control).

[0054] After 20 minutes, the heating is turned off, and then the test piece 8 continues to rotate for 20 minutes, so that one cycle is completed and the next cycle is automatically entered.

[0055] Mud spraying test scheme: This 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 normally open mode, but it is ensured that the mud nozzle 57 can spray to the test piece 8.

[0056] The mud test device adopts 10.2 full-color resistive type, HMI for human-computer interaction, control and display, PTC + aluminum alloy hot air (blowing type) heating, temperature controllable, default built-in preset test cycle A (immersion) / B (spraying) two test schemes, real-time display of current progress, steps (up to 9 steps), time, speed, cycle number can be edited. Meet the test functions of mud immersion and mud spraying tests of universal joints.

[0057] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A jetting and immersion universal joint assembly mud test device, comprising a workbench (1), characterized in that: It also comprises a hot air box (2), a mud box (3), a hot air delivery mechanism (4), a mud delivery mechanism (5), a driving mechanism (6) and an adjusting mechanism (7), wherein the mud box (3) is arranged inside 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 a workbench (1), the driving mechanism (6) cooperates with the adjusting mechanism (7), the hot air box (2) is connected to the hot air delivery mechanism (4), and the mud box (3) is connected to the mud delivery mechanism (5); The driving mechanism (6) comprises a driving seat (61) and a driving motor (62); the driving seat (61) is arranged on the workbench (1), and the driving motor (62) is arranged on the driving seat (61); The adjustment mechanism (7) comprises a length adjustment seat (71), an angle adjustment seat (72), a length adjustment slide rail (73), an angle adjustment slide rail (74), a length locking bolt (75), an angle locking bolt (76) and a bearing seat (77); the length adjustment seat (71) is slidably arranged on the workbench (1) via the length adjustment slide rail (73), and the length adjustment seat (71) is fixed to the workbench (1) via the length locking bolt (75); the angle adjustment seat (72) is slidably arranged on the length adjustment seat (71) via the angle adjustment slide rail (74), and the angle adjustment seat (72) is fixed to the length adjustment seat (71) via the angle locking bolt (76); and the bearing seat (77) is arranged on the angle adjustment seat (72).

2. The combined jetting and immersion universal joint assembly mud test device according to claim 1, characterized in that: 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).

3. The combined jetting and immersion universal joint assembly mud testing device according to claim 1, characterized in that: 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).

4. The combined jetting and immersion universal joint assembly mud testing device according to claim 3, characterized in that: The mud box (31) can be moved in the hot air box (21) via rollers, and the mud box (31) and the hot air box (21) can be fixed by bolts.

5. The combined jetting and immersion universal joint assembly mud testing device 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).

6. The combined jetting and immersion universal joint assembly mud testing device according to claim 1, characterized in that: The mud delivery mechanism (5) comprises a mud bucket (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 bucket (51) is connected to one end of the mud inlet pipe (53), 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 arranged on the mud inlet pipe (53) in sequence along the mud flow direction; one end of the mud outlet pipe (55) is connected to the first mud row port (23), the other end of the mud outlet pipe (55) is connected to the mud bucket (51), and the mud bucket (51) is provided with a stirring motor (56).

7. A test method for a combined jet and immersion universal joint assembly mud test device as claimed in any one of claims 1 to 6, characterized in that: The test method is the immersion mud test method as follows: S1. A mud nozzle (57) is provided on the left and right of the upper part 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 a set liquid level, the timing starts to ensure that the test piece (8) is immersed in the mud. Excess mud is discharged from the overflow port at the upper part 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 over, 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) is automatically opened, and hot air is circulated 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. After one cycle is completed, it automatically enters the next cycle.

8. A test method for a combined jet and immersion universal joint assembly mud test device as claimed in any one of claims 1 to 6, characterized in that: The test method is the mud spraying test method as follows: S1. A mud nozzle (57) is provided on the left and right of the upper part 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 flows back to the mud barrel (51); S2, stopping the spraying, the mud box cover (32) automatically opens, and the hot air circulates to dry the test piece (8); S3, the heating is turned off, and then the mud is sprayed again, while the test piece (8) rotates at a fixed speed; S4, the spraying is stopped, the mud box cover (32) is automatically opened, and the test piece (8) is dried by hot air. One cycle is completed and the next cycle is automatically entered.

Images