A multi-plate friction clutch anti-shock test device

Abstract

The utility model relates to a kind of multi-plate friction clutch impact test device, the utility model aims at providing a kind of multi-plate friction clutch impact test device, for solving the problem of above-mentioned friction clutch impact test, multi-plate friction clutch is installed in clutch box, four laser emission assemblies are respectively arranged in front, rear, left side and right side of clutch box, laser emission assembly is set towards clutch box, first pinion is fixedly installed on the input shaft of multi-plate friction clutch, two impact components are fixedly connected with the input shaft of multi-plate friction clutch, first driver is fixedly connected with first gear wheel, the output shaft of multi-plate friction clutch is fixedly connected with another two impact components, second pinion is fixedly installed on the output shaft of multi-plate friction clutch, second driver is fixedly connected with second gear wheel.The utility model belongs to the field of friction clutch impact test.

Description

Technical Field

[0001] This invention relates to an impact resistance testing device, specifically an impact resistance testing device for a multi-plate friction clutch, and belongs to the field of friction clutch impact testing. Background Technology

[0002] Multi-plate friction clutches are crucial transmission components in marine power transmission systems. In certain special situations, it is desirable for them to continue functioning normally even after the ship encounters non-contact explosions or other impacts. Therefore, the shock resistance of the friction clutch becomes a critical factor in its design. It is necessary to evaluate the shock resistance of marine multi-plate friction clutches during their design and development. When a multi-plate friction clutch is engaged, the piston presses the friction plates together under high-pressure oil, giving the clutch a strong shock resistance. However, when the clutch disengages, there is a significant gap between the piston and the friction plates. Under significant impact, the piston and friction plates may move, swing, or collide with each other, potentially causing problems such as friction plate breakage, spline indentation, and motion jamming, ultimately preventing power transmission. In the forward and reverse transmission gearboxes of ships, there are forward friction clutches and reverse friction clutches. During forward operation, the forward friction clutch engages and the reverse friction clutch disengages; during reverse operation, the reverse friction clutch engages and the forward friction clutch disengages. Therefore, under any operating condition, there will always be a clutch in a disengaged state. Thus, it is necessary to test and analyze the impact resistance performance of the friction clutch in the disengaged state. The motion state of the friction clutch piston and friction plates under impact conditions is tested to evaluate the friction clutch's impact resistance in the disengaged state. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-plate friction clutch impact resistance testing device to solve the above-mentioned problems in friction clutch impact resistance testing.

[0004] An impact resistance testing device for a multi-plate friction clutch includes a first large gear, a second large gear, a first small gear, a second small gear, a multi-plate friction clutch, a clutch housing, a first driver, a second driver, four impact components, and four laser emitting assemblies. The multi-plate friction clutch is installed inside the clutch housing. The four laser emitting assemblies are respectively located in front of, behind, to the left and right of the clutch housing, with the laser emitting assemblies facing the clutch housing. The first small gear is fixedly installed on the input shaft of the multi-plate friction clutch. Two impact components are fixedly connected to the input shaft of the multi-plate friction clutch. The first driver is fixedly connected to the first large gear, and the first large gear meshes with the first small gear. The two impact components are located on both sides of the first small gear. The output shaft of the multi-plate friction clutch is fixedly connected to the other two impact components. The second small gear is fixedly installed on the output shaft of the multi-plate friction clutch. The second driver is fixedly connected to the second large gear, and the second large gear meshes with the second small gear. The other two impact components are located on both sides of the second small gear.

[0005] Furthermore, the laser emitting component at the front of the clutch box is vertically oriented towards the clutch box, the laser emitting component at the rear of the clutch box is vertically oriented towards the clutch box, the laser emitting component on the left side is vertically oriented towards the left side of the clutch box, and the laser emitting component on the right side is vertically oriented towards the right side of the clutch box.

[0006] Furthermore, the multi-plate friction clutch includes a friction clutch input shaft, a friction clutch output shaft, a friction plate seat, a clutch housing, a piston, multiple outer friction plates, and multiple inner friction plates. The friction clutch input shaft is fixedly connected to the clutch housing, and the friction clutch output shaft is fixedly connected to the right end of the friction plate seat. Multiple inner friction plates are installed side by side in a straight line on the friction plate seat, and multiple outer friction plates are installed side by side in a straight line on the inner sidewall of the clutch housing. The multiple outer friction plates and multiple inner friction plates are staggered. The piston is installed inside the clutch housing and is fitted onto the friction clutch input shaft.

[0007] Furthermore, a reflective film is installed on the outer circumference of the piston, and multiple reflective films are evenly distributed along the circumference. The emitting end of the laser emitting assembly at the front of the clutch box is positioned facing one of the reflective films on the piston, and the emitting end of the laser emitting assembly at the rear of the clutch box is positioned facing another reflective film on the piston. The emitting end of the laser emitting assembly on the left side of the clutch box is positioned facing the side of the piston. Multiple reflective films are evenly distributed along the circumference on the outer end face of the left side of the piston, and a through groove is machined at the position corresponding to the emitting end of the laser emitting assembly on the clutch box. Multiple reflective films are evenly distributed along the circumference on the outer side of the right friction plate, and the emitting end of the laser emitting assembly on the right side of the clutch box is positioned facing the reflective film on the outer friction plate on the right side of the multi-plate friction clutch.

[0008] Furthermore, the laser emitting assembly includes a laser emitter, a laser receiver, and a laser rangefinder; the laser emitter and laser receiver are mounted on the laser rangefinder, and the laser emitter and laser receiver are located on the same end face of the laser rangefinder.

[0009] Furthermore, the first driver and the second driver have the same structure, and the first driver is a drive motor.

[0010] Furthermore, the friction pad holder is machined with external splines along the axial direction, and each internal friction pad is machined with internal splines. The friction pad holder and multiple internal friction pads are connected by splines.

[0011] Furthermore, the clutch housing is machined with internal splines along the axial direction, and each outer friction plate is machined with an external spline. The clutch housing and multiple outer friction plates are connected by splines.

[0012] Furthermore, it also includes a first coupling and a second coupling; the first drive is fixedly connected to the first large gear through the first coupling, and the second drive is fixedly connected to the second large gear through the second coupling.

[0013] The beneficial effects of this invention are:

[0014] 1. This application can simulate the axial and radial impact loads on a multi-plate friction clutch, test the motion state of the piston and friction plates when the input and output ends of the multi-plate friction clutch are in a forward and reverse disengaged idling state and encounter an impact, i.e., the motion displacement, velocity and acceleration, and test whether the friction clutch can normally engage and disengage after encountering an impact, thereby achieving the test purpose of impact.

[0015] 2. The experimental data in this application can be used to investigate the effects of the gap between friction plates, the tightness of the fit between the friction plates and their mating parts, and the tightness of the fit between the piston and its mating parts on the impact resistance of a multi-plate friction clutch, thereby guiding the impact resistance design of a multi-plate friction clutch. Attached Figure Description

[0016] Figure 1 This is a layout diagram of a multi-plate friction clutch impact resistance test device.

[0017] Figure 2 This is a structural diagram of a friction clutch.

[0018] Figure 3 This is a schematic diagram showing the distance to the target after the laser beam is reflected by the reflective film.

[0019] Figure 4 This is a schematic diagram showing the angle of the target after the laser beam is reflected by the reflective film. Detailed Implementation

[0020] Specific implementation method one: Combining Figures 1-4 This embodiment describes a multi-plate friction clutch impact resistance testing device, which includes a first large gear 3, a second large gear 9, a first small gear 14, a second small gear 13, a multi-plate friction clutch 4, a clutch housing 5, a first driver 1, a second driver 11, four impact components 12, and four laser emitting assemblies. The multi-plate friction clutch 4 is installed inside the clutch housing 5. The four laser emitting assemblies are respectively located in front, behind, to the left, and to the right of the clutch housing 5, with the laser emitting assemblies facing the clutch housing 5. The first small gear 14 is fixedly installed on the input shaft of the multi-plate friction clutch 4. The two impact components 12 are fixedly connected to the input shaft of the multi-plate friction clutch 4. The first driver 1 is fixedly connected to the first large gear 3. The first large gear 3 meshes with the first small gear 14. The two impact components 12 are located on both sides of the first small gear 14. The output shaft of the multi-plate friction clutch 4 is fixedly connected to the other two impact components 12. The second small gear 13 is fixedly installed on the output shaft of the multi-plate friction clutch 4. The second driver 11 is fixedly connected to the second large gear 9. The second large gear 9 meshes with the second small gear 13. The other two impact components 12 are located on both sides of the second small gear 13.

[0021] In this embodiment, the two outer impact components 12 are arranged with their impact directions coinciding with the center line of the multi-plate friction clutch 4, while the two middle impact components 12 are arranged with their impact directions perpendicular to the center line of the multi-plate friction clutch 4. The first driver 1 is used to adjust the input shaft speed of the multi-plate friction clutch 4. The second driver 11 is used to adjust the output shaft speed of the multi-plate friction clutch 4. The laser emitting assembly is located in a fixed position outside the clutch housing 5. The clutch housing 5 can control the engagement of the multi-plate friction clutch 4.

[0022] In this embodiment, during testing, the impact component 12 applies impact loads to the shaft system of the multi-plate friction clutch 4 in the disengaged state, either axially and radially at the input end and axially and radially at the output end. The impact component 12 at the shaft end applies axial impact loads, while the impact component 12 on the side applies radial impact loads. The impact component 12 can be an impact testing machine, a piston vibrator, a spring impact hammer, or a pneumatic impactor, and can set or adjust the impact energy and impact speed.

[0023] Specific Implementation Method Two: Combining Figures 1-2This embodiment describes a multi-plate friction clutch impact resistance testing device. The laser emitting assembly at the front of the clutch housing 5 is vertically aligned with the clutch housing 5; the laser emitting assembly at the rear of the clutch housing 5 is vertically aligned with the clutch housing 5; the laser emitting assembly on the left side is vertically aligned with the left side of the clutch housing 5; and the laser emitting assembly on the right side is vertically aligned with the right side of the clutch housing 5. Other structures and components are the same as in specific embodiment one.

[0024] Specific implementation method three: Combining Figures 1-2 This embodiment describes a multi-plate friction clutch impact resistance testing device. The multi-plate friction clutch 4 includes a friction clutch input shaft 21, a friction clutch output shaft 24, a friction plate seat 25, a clutch housing 22, a piston 23, multiple outer friction plates 26, and multiple inner friction plates 27. The friction clutch input shaft 21 is fixedly connected to the clutch housing 22, and the friction clutch output shaft 24 is fixedly connected to the right end of the friction plate seat 25. Multiple inner friction plates 27 are mounted side-by-side in a straight line on the friction plate seat 25, and multiple outer friction plates 26 are mounted side-by-side in a straight line on the inner sidewall of the clutch housing 22, with the multiple outer friction plates 26 and multiple inner friction plates 27 arranged alternately. The piston 23 is installed inside the clutch housing 22 and is fitted onto the friction clutch input shaft 21. Other structures and components are the same as in specific embodiment one.

[0025] In this embodiment, the friction clutch input shaft 21 and friction clutch output shaft 24 are arranged coaxially. The outer friction plate 26 and inner friction plate 27 are arranged sequentially in the annular cavity formed by the friction plate seat 25 and the inner hole of the clutch housing 22, forming a friction plate assembly. The piston 23 is a rotating body, fitted onto the friction clutch input shaft 21 or friction clutch output shaft 24, and can move axially along the multi-plate friction clutch shaft 4 under external force, thus pressing the friction plate assembly.

[0026] Specific implementation method four: Combination Figures 1-2This embodiment describes a multi-plate friction clutch impact resistance testing device. A reflective film 29 is mounted on the outer circumferential surface of the piston 23, and multiple reflective films 29 are evenly distributed circumferentially. The emitting end of the laser emitting assembly at the front of the clutch housing 5 faces one reflective film 29 on the piston 23, and the emitting end of the laser emitting assembly at the rear of the clutch housing 5 faces another reflective film 29 on the piston 23. The emitting end of the laser emitting assembly on the left side of the clutch housing 5 faces the side of the piston 23. Multiple reflective films 29 are evenly distributed circumferentially on the outer end face of the left side of the piston 23. A through groove 28 is machined in the clutch housing 5 at the position corresponding to the emitting end of the laser emitting assembly. Multiple reflective films 29 are evenly distributed circumferentially on the outer side of the right friction plate, and the emitting end of the laser emitting assembly on the right side of the clutch housing 5 faces the reflective film 29 on the outer friction plate 26 on the right side of the multi-plate friction clutch 4. Other structures and components are the same as in specific embodiment one.

[0027] Specific Implementation Method Five: Combining Figures 1-2 This embodiment describes a multi-plate friction clutch impact resistance testing device. The laser emitting assembly includes a laser emitter 6, a laser receiver 7, and a laser rangefinder 8. The laser emitter 6 and laser receiver 7 are mounted on the laser rangefinder 8, and are located on the same end face of the laser rangefinder 8. Other structures and components are the same as in specific embodiments two, three, or four.

[0028] In this embodiment, the laser emitter 6 of the laser rangefinder 8 at both ends of the multi-plate friction clutch 4 can emit pulsed laser beams to the end face of the piston 23 and the outermost friction plate end face through the through groove 28. The laser rangefinder 8 on the side of the shaft system of the multi-plate friction clutch 4 can emit pulsed laser beams to the outer cylindrical surface of the piston 23 through the through groove 28. A reflective film 29 is attached to the end face of the piston 23, the outer cylindrical surface, and the outermost friction plate end face. The laser beam can be projected onto the reflective film 29, reflected by the target, and received by the laser receiver 7. The laser rangefinder 8 measures the time from emission to reception of the laser beam and calculates the distance between the laser rangefinder 8 and the target, as well as the speed of the target.

[0029] Specific Implementation Method Six: Combination Figures 1-2 This embodiment describes a multi-plate friction clutch impact resistance testing device. The first driver 1 and the second driver 11 have the same structure, and the first driver 1 is a drive motor. Other structures and components are the same as in specific embodiment one.

[0030] Specific implementation method seven: Combining Figures 1-2This embodiment describes a multi-plate friction clutch impact resistance testing device. The friction plate seat 25 has external splines machined along its axial direction, and each inner friction plate 27 has an internal spline machined on it. The friction plate seat 25 and the multiple inner friction plates 27 are connected by splines. Other structures and components are the same as in specific embodiment seven-three.

[0031] Specific implementation method eight: Combination Figures 1-2 This embodiment describes a multi-plate friction clutch impact resistance testing device. The clutch housing 22 has internal splines machined along its axial direction, and each outer friction plate 26 has an external spline machined on it. The clutch housing 22 and the multiple outer friction plates 26 are connected by splines. Other structures and components are the same as in specific embodiment three.

[0032] Specific Implementation Method Nine: Combining Figures 1-2 This embodiment describes a multi-plate friction clutch impact resistance testing device, which further includes a first coupling 2 and a second coupling 10; a first driver 1 is fixedly connected to a first large gear 3 via the first coupling 2, and a second driver 11 is fixedly connected to a second large gear 9 via the second coupling 10. Other structures and components are the same as in specific embodiment three.

[0033] Working principle

[0034] This application is in Figure 3 , Figure 4 In the illustrated embodiment, the piston 23 and friction plate change position and angle upon impact, causing changes in the reflected laser beam path. Consequently, the laser rangefinder 8 receives the laser beam at different times and from different positions. The laser rangefinder 8 can calculate the distance to the target based on the receiving time, process the image signal, extract the center of the laser spot, calculate the movement of the laser spot, and then obtain the tilt angle α of the target based on the distance. By analyzing the changes in target displacement, angle, velocity, and acceleration, its dynamic response after impact can be determined.

[0035] If the target only undergoes translational motion during the impact, let t1 be the time it takes for the laser to be emitted from the laser emitter 6 to be received by the laser receiver 7 before the impact, and t2 be the time it takes to be received after the impact. Let the speed of light be c, then the displacement of the friction plate being measured is c(t2-t1) / 2.

[0036] If the target only rotates during the impact, the amount of movement of the laser spot is x, and the laser return time is t, then the target tilt angle α≈arctan[x / (ct / 2)] / 2.

[0037] If the target undergoes both translation and rotation during the impact, the two equations above are combined to iteratively calculate the accurate displacement and tilt angle.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A multi-plate friction clutch impact resistance testing device, characterized in that: It includes a first large gear (3), a second large gear (9), a first small gear (14), a second small gear (13), a multi-plate friction clutch (4), a clutch housing (5), a first driver (1), a second driver (11), four impact components (12), and four laser emitting assemblies; the multi-plate friction clutch (4) includes a friction clutch input shaft (21), a friction clutch output shaft (24), a friction plate seat (25), a clutch housing (22), a piston (23), multiple outer friction plates (26), and multiple inner friction plates (27); A multi-plate friction clutch (4) is installed inside a clutch housing (5). Four laser emitting components are respectively positioned in front, behind, to the left, and to the right of the clutch housing (5), with the laser emitting components facing the clutch housing (5). A first pinion (14) is fixedly mounted on the input shaft of the multi-plate friction clutch (4). Two impact components (12) are fixedly connected to the input shaft of the multi-plate friction clutch (4). A first driver (1) is fixedly connected to a first large gear (3). The first large gear (3) meshes with the first pinion (14), and the two impact components (12) are positioned on both sides of the first pinion (14). The output shaft of the multi-plate friction clutch (4) is fixedly connected to the other two impact components (12). A second pinion (13) is fixedly mounted on the output shaft of the multi-plate friction clutch (4). On the shaft, the second driver (11) is fixedly connected to the second large gear (9), the second large gear (9) meshes with the second small gear (13), and two other impact components (12) are located on both sides of the second small gear (13). The friction clutch input shaft (21) is fixedly connected to the clutch housing (22), and the friction clutch output shaft (24) is fixedly connected to the right end of the friction plate seat (25). Multiple inner friction plates (27) are installed side by side in a straight line on the friction plate seat (25), and multiple outer friction plates (26) are installed side by side in a straight line on the inner side wall of the clutch housing (22). The multiple outer friction plates (26) and multiple inner friction plates (27) are staggered. The piston (23) is installed inside the clutch housing (22) and is fitted on the friction clutch input shaft (21). A reflective film (29) is installed on the outer ring surface of the piston (23), and multiple reflective films (29) are evenly distributed along the circumference. The laser emitting component in front of the clutch box (5) is positioned facing one of the reflective films (29) on the piston (23), and the laser emitting component in the back of the clutch box (5) is positioned facing another reflective film (29) on the piston (23). The laser emitting component on the left side of the clutch box (5) is positioned facing the side of the piston (23). Multiple reflective films (29) are evenly distributed along the circumference on the outer end face of the left side of the piston (23), and a through groove (28) is machined at the position corresponding to the laser emitting component in the clutch box (5). Multiple reflective films (29) are evenly distributed along the circumference on the outer side of the friction plate on the right side. The laser emitting component on the right side of the clutch box (5) is positioned facing the reflective film (29) on the outer friction plate (26) on the right side of the multi-plate friction clutch (4).

2. The multi-plate friction clutch impact resistance testing device according to claim 1, characterized in that: The laser emitting component at the front of the clutch housing (5) is vertically positioned facing the clutch housing (5), the laser emitting component at the rear of the clutch housing (5) is vertically positioned facing the clutch housing (5), the laser emitting component at the left side is vertically positioned facing the left side of the clutch housing (5), and the laser emitting component at the right side is vertically positioned facing the right side of the clutch housing (5).

3. The multi-plate friction clutch impact resistance testing device according to claim 2, characterized in that: The laser emitting assembly includes a laser emitter (6), a laser receiver (7), and a laser rangefinder (8); the laser emitter (6) and the laser receiver (7) are mounted on the laser rangefinder (8), and the laser emitter (6) and the laser receiver (7) are located on the same end face of the laser rangefinder (8).

4. The multi-plate friction clutch impact resistance testing device according to claim 1, characterized in that: The first driver (1) and the second driver (11) have the same structure, and the first driver (1) is a drive motor.

5. The multi-plate friction clutch impact resistance testing device according to claim 1, characterized in that: The friction plate holder (25) is machined with an external spline along the axial direction, and each inner friction plate (27) is machined with an internal spline. The friction plate holder (25) and multiple inner friction plates (27) are connected by splines.

6. The multi-plate friction clutch impact resistance testing device according to claim 1, characterized in that: The clutch housing (22) is machined with internal splines along the axial direction, and each external friction plate (26) is machined with external splines. The clutch housing (22) and multiple external friction plates (26) are connected by splines.

7. The multi-plate friction clutch impact resistance testing device according to claim 1, characterized in that: It also includes a first coupling (2) and a second coupling (10); the first driver (1) is fixedly connected to the first large gear (3) through the first coupling (2), and the second driver (11) is fixedly connected to the second large gear (9) through the second coupling (10).

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