Axially rotating variable damper

Abstract

The present invention provides an axially rotating variable damper, comprising a cylindrical sealed housing filled with damping fluid, a roller shaft, and a hinge disposed on the roller shaft and within the housing. The housing comprises a semi-cylindrical upper housing, a semi-cylindrical lower housing, and end caps with central holes at both ends of the housing. The hinge is a strip-shaped body arranged along the axis on the outer surface of the roller shaft. The inner wall of the upper housing closely fits the outer surface of the hinge, and the inner wall of the lower housing closely fits the outer surface of the roller shaft. The surfaces of the lower housing fixedly connected to the upper housing are end faces A and B, respectively. The lower housing is provided with a plurality of flow channels extending from end face A along the inner wall to end face B. All of the diversion channels are connected together so that the damping of the damping fluid flowing from the main flow channel of end face A to the main flow channel of end face B is greater than the damping of the damping fluid flowing from the main flow channel of end face B to the main flow channel of end face A. The present invention can achieve different damping according to different directions of rotation, is suitable for large-scale equipment, and has a simple and reliable structure.

Description

Technical Field

[0001] The invention relates to a damper, in particular to an axially rotating variable damper. Background Art

[0002] Rotary dampers enable products to achieve smooth mechanical movement during rotation, thereby improving product quality and lifespan. They are widely used in laptop opening and closing, seat adjustment, washing machines, toilets, etc.

[0003] In order to achieve different damping in different steering directions, various types of variable dampers have appeared. The Chinese invention patent application with application publication number CN114197976A discloses a hydraulic damping hinge, including a shell, a damping shaft is installed in the shell and is filled with damping fluid, at least two damping blades are arranged on the damping shaft, the damping shaft can drive the damping blades to rotate, the damping blades are all first blades or include a first blade and a second blade, at least one one-way valve is arranged on the first blade, and at least one liquid hole is arranged on the second blade. The space before and after the damping blade is blocked by the damping blade but can be connected in one direction through the one-way valve or always connected through the liquid hole. The one-way valve includes a valve body and a valve core arranged in the valve body, the valve body is provided with a valve port and a liquid flow port respectively connected to the space before and after the first blade, the damping fluid can push the valve core to block the valve port and close the one-way valve or push the valve core out of the valve port to open the one-way valve, so as to control the flow area of ​​the damping fluid and realize forward and reverse rotation. The Chinese utility model patent with the authorization announcement number CN212985884U discloses a rotary damper, which includes a cylinder that can be filled with damping oil, a rotating shaft located in the inner cavity of the cylinder and rotating with the inner wall of the cylinder to disturb the flow of damping oil, and two one-way valve plates. The inner cavity wall of the cylinder is provided with a radially gradient arc surface that is symmetrically arranged on the left and right, and the arc surface is respectively located between the two oil-isolating ribs; the rotating shaft includes an axis core and an axis core arranged opposite to the axis core. The two rotors of the rotating shaft are each equipped with a one-way valve disc that slides with the inner wall of the cylinder. The valve disc and the gradient arc surface of the inner wall of the cylinder form an oil gap. The damping oil flows from the high-pressure oil chamber to the low-pressure oil chamber through this oil gap, forming a damping force. When the rotating shaft rotates clockwise, the damping fluid flows through the gradient arc surface, resulting in high damping. When the rotating shaft rotates counterclockwise, the damping fluid flows through the gradient arc surface and the oil drain plate of the one-way valve, resulting in low damping, thereby achieving different damping levels for forward and reverse rotation. The above-mentioned damper has the following problems: 1. It uses blades and one-way valves to achieve different damping in different rotation directions. The one-way valve can withstand a small load and is only suitable for small loads, such as in home scenes such as wardrobes and toilets. Simply enlarging the size of the structure cannot solve the problem of high damping and high structural reliability requirements, and it cannot be used in large equipment. 2. During operation, the blades or one-way valves will be impacted. Once the blades or one-way valves are damaged, they will not be able to function, resulting in poor structural reliability. 3. The structure is complex. Summary of the Invention

[0004] The object of the present invention is to provide a variable damper which can be used for large equipment, has good reliability, simple structure and is easy to manufacture.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an axially rotating variable damper, characterized in that it includes a cylindrical sealed housing filled with damping fluid, a roller shaft, and a loose leaf disposed on the roller shaft and located in the housing;

[0006] The shell comprises a semi-cylindrical upper shell and a semi-cylindrical lower shell with different inner wall radii, and end covers with central holes at both ends of the shell;

[0007] The loose leaf is a strip-shaped body arranged on the outer surface of the roller along the axis;

[0008] The inner wall of the upper shell is in close contact with the outer surface of the hinge, and the inner wall of the lower shell is in close contact with the outer surface of the roller;

[0009] The surfaces of the lower shell and the upper shell fixedly connected are end surface A and end surface B respectively. The lower shell is provided with a plurality of flow grooves starting from end surface A and running along the inner wall to end surface B. Each flow groove includes n branch grooves located on the inner wall of the lower shell and connected in sequence, and an A end surface main flow groove opened on end surface A and a B end surface main flow groove opened on end surface B, which are connected through the branch grooves.

[0010] The diverter groove includes three flow channels connected to form a triangle, and adjacent diverter grooves are connected through one of the three nodes formed by the three flow channels. All the diverter grooves are connected together so that the damping of the damping fluid flowing from the main groove of the A end face to the main groove of the B end face is greater than the damping of the damping fluid flowing from the main groove of the B end face to the main groove of the A end face.

[0011] Furthermore, the three flow channels are flow channel one, flow channel two and flow channel three, the angle between flow channel one and flow channel three is α, the angle between flow channel one and flow channel two is β, and the angle between flow channel two and flow channel three is γ, wherein 15°≤α≤45°, β is an acute angle, and there are four flow channels directly connected through nodes between adjacent diversion grooves, two of which have an angle of 180°, and the two flow channels with an angle of 180° are not both flow channel two, and the angles between the other two flow channels are α, β or γ, and flow channel one and flow channel three of the first diversion groove are connected to the main flow groove of the A end face, and the angle between flow channel one of the first diversion groove and the main flow groove of the A end face is 180°.

[0012] In one embodiment:

[0013] The angle between the flow channel 3 of the i-th diverter and the flow channel 3 of the i+1-th diverter is 180°, and the angle between the flow channel 2 of the i-th diverter and the flow channel 1 of the i+1-th diverter is β, where i is an odd number and less than n;

[0014] The angle between the flow channel 1 of the jth diversion slot and the flow channel 1 of the j+1th diversion slot is 180°, and the angle between the flow channel 2 of the jth diversion slot and the flow channel 3 17 of the j+1th diversion slot is γ, where j is an even number and less than n.

[0015] Furthermore, when n is an even number, the angle between the flow channel 1 of the nth branch groove and the main flow groove of the B end surface is 180°;

[0016] When n is an odd number, the angle between the flow channel 3 of the nth branch groove and the main groove on the B end face is 180°.

[0017] In a preferred embodiment of this embodiment, β=γ.

[0018] In another preferred aspect of this embodiment, γ is an obtuse angle.

[0019] In another embodiment:

[0020] The angle between the flow channel 3 of the i-th diverter and the flow channel 1 of the i+1-th diverter is 180°, and the angle between the flow channel 2 of the i-th diverter and the flow channel 2 of the i+1-th diverter is α, where i is an odd number and less than n;

[0021] The angle between the second flow channel of the jth diversion slot and the first flow channel of the j+1th diversion slot is 180°, and the angle between the third flow channel of the jth diversion slot and the third flow channel of the j+1th diversion slot is β, where j is an even number and less than n.

[0022] Furthermore,

[0023] When n is an even number, the angle between the second flow channel of the nth branch channel and the main flow channel of the B end face is 180°;

[0024] When n is an odd number, the angle between the flow channel 3 of the nth branch groove and the main groove on the B end face is 180°.

[0025] Preferably, γ is an obtuse angle.

[0026] Beneficial effects of the present invention:

[0027] 1. The structure of the present invention can withstand large external loads and provide sufficient damping, and is suitable for large equipment such as flap doors;

[0028] 2. The present invention relies on the special geometric structure of the flow channel to make the damping fluid consume energy by impacting the blades or the one-way valve, which has good structural reliability and is not easy to damage;

[0029] 3. The present invention only requires one moving part and one fixed part, namely the roller shaft and the housing with the flow channel, to achieve different damping effects for different steering conditions. It has a simple structure and is easy to process, without the need for blades, one-way valves, and other structures.

[0030] 4. The present invention can process different numbers of flow grooves according to actual needs, so that the damping size in different rotation directions meets the actual needs and avoids excessive or insufficient damping. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an explosion diagram of the present invention;

[0032] Figure 2 is a cross-sectional view of the present invention;

[0033] Figure 3 Schematic diagram of the planar structure of the flow channel in Example 1, where the damping fluid flows from end face A to end face B;

[0034] Figure 4 Schematic diagram of the planar structure of the flow channel in Example 1, where the damping fluid flows from the B end face to the A end face;

[0035] Figure 5 Schematic diagram of the planar structure of the flow channel in Example 2, where the damping fluid flows from end face A to end face B;

[0036] Figure 6 Schematic diagram of the planar structure of the flow channel in Example 2, where the damping fluid flows from the B end face to the A end face;

[0037] Figure 7 Schematic diagram of the planar structure of the flow channel in Example 3, where the damping fluid flows from the A end face to the B end face;

[0038] Figure 8 Schematic diagram of the planar structure of the flow channel in Example 3, where the damping fluid flows from the B end face to the A end face;

[0039] Figure 9 Schematic diagram of the planar structure of the flow channel in Example 4, where the damping fluid flows from the A end face to the B end face;

[0040] Figure 10 Schematic diagram of the planar structure of the flow channel in Example 4, where the damping fluid flows from the B end face to the A end face;

[0041] Figure 11 This is a schematic diagram of the structure of the present invention applied to a flap door;

[0042] Figure 12 for Figure 11 Enlarged schematic diagram of point C in the middle;

[0043] Figure 13 This is a schematic diagram of the structure when the door is opened;

[0044] Figure 14 This is a structural diagram of the flap door when it is closed;

[0045] Figure numerals: roller 1, lower shell 2, upper shell 3, end cover 4, loose leaf 5, flow groove 6, first section roller 7, second section roller 8, third section roller 9, end face A 10, end face B 11, main flow groove 12 of end face A, main flow groove 13 of end face B, diversion groove 14, flow channel one 15, flow channel two 16, flow channel three 17, fixed support 18, torsion bar spring 19, flap door shaft 20, coupling 21, flap door support arm 22, flap door 23, damping chamber 24. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] like Figure 1 As shown, the variable damper includes a cylindrical sealed housing filled with damping fluid, a roller shaft 1, and a hinge 5 disposed on the roller shaft 1 and located in the housing;

[0048] The shell comprises a semi-cylindrical upper shell 3 and a semi-cylindrical lower shell 2 with different inner wall radii, and end covers 4 with central holes at both ends of the shell;

[0049] The roller shaft 1 includes a first roller shaft section 7, a second roller shaft section 8, and a third roller shaft section 9 which are connected as one piece and coaxially from one end to the other end of the roller shaft 1. The second roller shaft section 8 has the largest diameter and is located inside the shell. The first roller shaft section 7 and the third roller shaft section 9 extend from the two end covers 4 of the shell respectively.

[0050] The loose-leaf 5 is a strip-shaped body arranged along the axis on the outer surface of the second roller 8;

[0051] The inner wall of the upper shell 3 is tightly fitted with the outer surface of the movable leaf 5, and the inner wall of the lower shell 2 is tightly fitted with the outer surface of the second roller shaft 8. The chamber formed by the upper shell 3, the roller shaft 1, the lower shell 2 and the end cover 4 is divided into two damping chambers 24 in the circumferential direction by the movable leaf 5.

[0052] The surfaces where the lower shell 2 is fixedly connected to the upper shell 3 are end face A 10 and end face B 11, respectively. The lower shell 2 is provided with six flow channels 6 running from end face A 10 along the inner wall to end face B 11. Each flow channel 6 includes three branch channels 14 located on the inner wall of the lower shell 2 and connected in sequence, and an A-end face main flow channel 12 opened on end face A and a B-end face main flow channel 13 opened on end face B, which are connected through the branch channels 14.

[0053] The diverter groove 14 includes three connected flow channels forming a triangle, and adjacent diverter grooves 14 are connected through one of the three nodes formed by the three flow channels. The three diverter grooves 14 are connected together so that the damping of the damping fluid flowing from the main flow groove 12 of the A end face to the main flow groove 13 of the B end face is greater than the damping of the damping fluid flowing from the main flow groove 13 of the B end face to the main flow groove 12 of the A end face; the three flow channels are flow channel 15, flow channel 2 16 and flow channel 3 17, and the angle between flow channel 15 and flow channel 3 17 is α, and the angle between flow channel 15 and flow channel 2 16 is α. The included angle is β, the included angle between flow channel 2 16 and flow channel 3 17 is γ, where 15°≤α≤45°, β is an acute angle, and there are four flow channels directly connected through nodes between adjacent branch grooves 14, two of which have an included angle of 180°. The two flow channels with an included angle of 180° are not both flow channel 2 16, and the included angles of the other two flow channels are α, β or γ; flow channel 1 15 and flow channel 3 17 of the first branch groove 14 are connected to the main flow groove 12 on the A end face, and the included angle between flow channel 15 of the first branch groove 14 and the main flow groove 12 on the A end face is 180°.

[0054] Example 1

[0055] like Figure 3 As shown, there are three diverter grooves 14, the angle between the flow channel 15 and the flow channel 3 17 is α = 30°, the angle between the flow channel 15 and the flow channel 2 16 is β = 75°, and the angle between the flow channel 2 16 and the flow channel 3 17 is γ = 75°. The nodes of the three diverter grooves 14 are marked as ① to ⑦ in sequence. The main flow groove 12 on the A end surface is connected to the first diverter groove 14 through the node ①. The angle between the main flow groove 12 on the A end surface and the flow channel 15 of the first diverter groove 14 is 180°. The first diverter groove 14 is connected to the second diverter groove 14 through the node ③. The flow channel 3 17 of the first diverter groove 14 is connected to the The angle between flow channel three 17 of the second diverter groove 14 is 180°, the angle between flow channel two 16 of the first diverter groove 14 and flow channel one 15 of the second diverter groove 14 is β=75°, the second diverter groove 14 is connected to the third diverter groove 14 through node ⑤, the angle between flow channel one 15 of the second diverter groove 14 and flow channel one 15 of the third diverter groove 14 is 180°, the angle between flow channel two 16 of the second diverter groove 14 and flow channel three 17 of the third diverter groove 14 is γ=75°, and the angle between flow channel three 17 of the third diverter groove 14 and the main flow groove 13 on the B end face is 180°.

[0056] like Figure 2 、 3As shown, when the roller 1 rotates counterclockwise, the damping fluid on the left side of the loose-leaf 5 flows from the A end face to the B end face, and the mainstream flows from the A end face 10 in a straight line along the main flow groove 12 of the A end face to the direction of node ②. When the mainstream passes through node ①, it will split into a tributary and flow to node ③. At this time, the mainstream flows from node ① to node ②, and the tributary flows from node ① to node ③. The mainstream undergoes a large angle momentum change of 105° at node ②, consumes energy, and then moves along the direction from node ② to node ③, and merges with the tributary at node ③. Since the intersection angle of the mainstream direction flowing from node ② to node ③ and the tributary direction flowing from node ① to node ③ is large, that is, 75°, more energy is offset by each other, which is manifested as mixing to generate vortices. The generation of vortices requires several different directions to flow. According to the principle of vector decomposition, the more vectors that can be offset at the node, the greater the energy consumption, and the more vortices are generated. The angular momentum of the fluid passing through nodes ①—③—④ changes to a minimum of 0 when it passes through nodes ①—③—⑤, and an angular momentum change of 30° occurs when the fluid passes through nodes ②—③—④. The angular momentum change of the fluid passing through nodes ②—③—④ occurs to be 75°, and the angular momentum change of the fluid passing through nodes ②—③—⑤ occurs to be 105°. A small change in angular momentum means a small resistance. That is, the tributary originally flowing from node ① to node ③ has a straight line from node ③ to node ④ that does not require a change in angular momentum. The main stream regenerated at node ③ will advance along the direction from node ③ to node ④, and the tributary will advance along the direction from node ③ to node ⑤, and then enter the next cycle. The main stream will undergo a large angular momentum change of 105° each time it passes through a cycle, gradually consuming energy. A total of three cycles are carried out, and the damping fluid flows out from the main stream groove 13 on the B end face.

[0057] like Figure 2 、 4As shown, when the roller 1 rotates clockwise, the damping fluid on the right side of the loose-leaf 5 flows from the B end face to the A end face, and the mainstream flows from the B end face 11 in a straight line along the main flow groove 13 of the B end face to the direction of node ⑤. When the mainstream passes through node ⑦, a tributary will flow to node ⑥. At this time, the mainstream flows from node ⑦ to node ⑤, and the tributary flows from node 7 to node ⑥. The tributary undergoes a large angle momentum change of 105° at node ⑥, consumes energy, and then moves along the direction from node ⑥ to node ⑤, and merges with the mainstream at node ⑤. Since the intersection angle between the tributary direction flowing from node ⑥ to node ⑤ and the mainstream direction flowing from node ⑦ to node ⑤ is as small as 30°, compared with the case where the damping fluid flows from the A end face to the B end face, the vortex generated is smaller, the energy that offsets each other is less, the damping fluid flow rate decreases less, and the pressure increases. The minimum change in angular momentum when the fluid passes through nodes ⑥—⑤—③ is 0. The angular momentum of the fluid changes by 75° when passing through nodes ⑥—⑤—④. The angular momentum of the fluid changes by 30° when passing through nodes ⑦—⑤—③. The angular momentum of the fluid changes by 105° when passing through nodes ⑦—⑤—④. A small change in angular momentum means a small resistance. That is, the tributary originally flowing from node ⑥ to node ⑤ has a straight line from node ⑤ to node ③ that does not require a change in angular momentum. The main stream regenerated at node ⑤ will advance along the direction from node ⑤ to node ③, and the tributary will advance along the direction from node ⑤ to node ④, and then enter the next cycle. Every time the tributary passes through a cycle, a large angular momentum change of 105° will occur, gradually consuming energy. A total of three cycles are carried out, and the damping fluid flows out from the main stream groove 12 on the A end face.

[0058] According to the characteristics of fluid mechanics, the energy required for a 105° change in angular momentum, that is, the energy consumed by the fluid, is six times the energy required for a 30° change in angular momentum, that is, six times the damping change. The greater the change in angular momentum of the damping fluid flowing from end face A to end face B in each cycle, the greater the damping. The smaller the change in angular momentum of the damping fluid flowing from end face B to end face A in each cycle, the smaller the damping, and the greater the difference in damping in different directions.

[0059] Compared with the damping fluid flowing from end face A to end face B and from end face B to end face A, the mainstream of the former will undergo three large-angle momentum changes of 105° at nodes ②, ④, and ⑥, while the mainstream of the latter will undergo three 30° momentum changes at nodes ①, ③, and ⑤. Relatively speaking, the former consumes more energy. The angle at which the mainstream and tributary of the former meet at nodes ③, ⑤, and ⑦ is 75°, while the angle at which the mainstream and tributary of the latter meet at nodes ①, ③, and ⑤ is 30°. Relatively speaking, the former consumes more energy. Therefore, the damping fluid needs to consume more energy to flow from end face A to end face B, and the damping is greater. Therefore, the damping is small when roller 1 rotates clockwise, and the damping is large when it rotates counterclockwise.

[0060] like Figure 11The present invention is applied to a flap door. The variable damper is fixed to the wall. The first roller 7 and the third roller 9 extending at both ends are respectively connected to the flap door shaft 20 through a coupling 21. The torsion bar spring 19 fixed to the wall is welded to the flap door shaft 20 to transmit torque. One end of the flap door support arm 22 is fixedly connected to the flap door shaft 20, and the other end is fixedly connected to the flap door 23. Figure 13 As shown, when the water pressure is high, the water flow will lift the flap door 23, causing the flap door shaft 20 to rotate in the clockwise direction, while driving the hinge 5 on the roller 1 to rotate clockwise, causing the damping fluid to flow from the B end face to the A end face. The damping is small, and the required opening force is relatively small, which is convenient for starting the unit. Figure 14 As shown, when the water pressure becomes smaller and is not enough to push the flap door 23 to open, the flap door 23 rotates counterclockwise, and at the same time drives the hinge 5 on the roller 1 to rotate counterclockwise, so that the damping fluid flows from the A end face to the B end face, and the damping is larger, so that the flap door 23 can be slowly lowered to avoid sudden closing and causing safety accidents.

[0061] Example 2

[0062] like Figure 5 As shown, the number and structure of the diverter grooves 14 are the same as those in Example 1, and the only difference is that the communication mode between adjacent diverter grooves 14 is different. Similarly, the nodes of the three diverter grooves 14 are marked as ① to ⑦ in sequence. The main flow groove 12 on the end face of A is connected to the first diverter groove 14 through node ①. The angle between the main flow groove 12 on the end face of A and the flow channel 15 of the first diverter groove 14 is 180°. The first diverter groove 14 is connected to the second diverter groove 14 through node ③. The flow channel 17 of the first diverter groove 14 is connected to the flow channel 15 of the second diverter groove 14. The included angle is 180°, the included angle between the flow channel 2 16 of the first diverter groove 14 and the flow channel 2 16 of the second diverter groove 14 is α=30°, the second diverter groove 14 is connected to the third diverter groove 14 through node ⑤, the included angle between the flow channel 2 16 of the second diverter groove 14 and the flow channel 1 15 of the third diverter groove 14 is 180°, the included angle between the flow channel 3 17 of the second diverter groove 14 and the flow channel 3 17 of the third diverter groove 14 is β=75°, and the included angle between the flow channel 3 17 of the third diverter groove 14 and the main flow groove 13 on the B end face is 180°.

[0063] like Figure 2 、 5As shown in the figure, when the roller 1 rotates counterclockwise, the damping fluid flows from the A end face to the B end face, and the mainstream flows from the A end face 10 in a straight line along the main flow groove 12 of the A end face to the direction of node ②. When the mainstream passes through node ①, it will separate into a branch flow and flow to node ③. The mainstream undergoes a large angle momentum change of 105° at node ②, consuming energy, and then merges with the branch flow at node ③. The mainstream flowing from node ② to node ③ and the branch flow from node ① to node ③ have a flow angle of 75°. After the intersection, a large vortex is generated, consuming energy, the flow rate of the damping fluid decreases, and the pressure increases. The angular momentum change of the fluid through nodes ①-③-④ is minimized to 0. The mainstream regenerated at node ③ will advance along the direction from node ③ to node ④, and the branch flow will advance along the direction from node ③ to node ⑤. When the mainstream passes through node ④, a 150° angle change occurs. Large-angle momentum changes consume energy. The main flow from node ④ to node ⑤ and the tributary flow from node ③ to node ⑤ have a flow angle of 75°. After the intersection, a large vortex is generated, which consumes energy. The damping fluid flow rate decreases and the pressure further increases. The angular momentum change of the fluid through nodes ③-⑤-⑥ is minimized to 0. The main flow regenerated at node ⑤ will advance along the direction from node ⑤ to node ⑥, and the tributary flow will advance along the direction from node ⑤ to node ⑦. When the main flow passes through node ⑥, a large-angle momentum change of 105° occurs, which consumes energy. The main flow from node ⑥ to node ⑦ and the tributary flow from node ⑤ to node ⑦ have a flow angle of 75°. After the intersection, a large vortex is generated, which consumes energy. The damping fluid flow rate decreases and the pressure further increases. The damping fluid finally flows out from the main flow groove 13 on the B end face through node ⑦.

[0064] like Figure 2 、 6As shown in the figure, when the roller 1 rotates clockwise, the damping fluid flows from the B end face to the A end face, and the mainstream flows from the B end face 11 in a straight line along the main flow groove 13 of the B end face to the direction of node ⑤. When the branch flows through node ⑦, it will separate into a branch and flow to node ⑥. The branch undergoes a large angle momentum change of 105° at node ⑥, consuming energy, and then merges with the mainstream at node ⑤. The mainstream flowing from node ⑦ to node ⑤ and the branch flowing from node ⑥ to node ⑤ have a flow angle of 30°. After the intersection, a small vortex is generated, consuming energy, the flow rate of the damping fluid decreases, and the pressure increases. The angular momentum change of the fluid through nodes ⑥-⑤-③ is minimized to 0. The mainstream regenerated at node ⑤ will advance along the direction from node ⑤ to node ③, and the branch will advance along the direction from node ⑤ to node ④. When the branch passes through node ④, a 150° angle change occurs. Large-angle momentum changes, energy is consumed. The main flow from node ⑤ to node ③ and the tributary flow from node ④ to node ③ have a flow angle of 75°. After the intersection, a large vortex is generated, which consumes energy. The damping fluid flow rate decreases and the pressure further increases. The angular momentum change of the fluid through nodes ④-③-① is minimized to 0. The main flow regenerated at node ③ will advance along the direction from node ③ to node ①, and the tributary will advance along the direction from node ③ to node ②. When the tributary passes through node ②, a large-angle momentum change of 105° occurs, which consumes energy. The main flow from node ③ to node ① and the tributary flow from node ② to node ① have a flow angle of 30°. After the intersection, a small vortex is generated, which consumes energy. The damping fluid flow rate decreases and the pressure further increases. The damping fluid finally flows out from the main flow groove 12 on the A end face through node ①.

[0065] Compared with the damping fluid flowing from end face A to end face B and from end face B to end face A, the mainstream of the former will pass through two 105° large-angle momentum changes at nodes ② and ⑥ and a 150° large-angle momentum change at node ④, while the mainstream of the latter will pass through two 30° momentum changes at nodes ⑤ and ① and a 75° large-angle momentum change at node ③. The mainstream of the former consumes more energy. The angle at which the mainstream and tributaries meet at nodes ③, ⑤, and ⑦ is 75°, while the angle at which the mainstream and tributaries meet at nodes ① and ⑤ is 30°, and the angle at which the mainstream and tributaries meet at node ③ is 75°. Relatively speaking, the former consumes more energy and has greater damping. Therefore, the damping fluid needs to consume more energy and has greater damping when flowing from end face A to end face B. Therefore, the damping is small when roller 1 rotates clockwise, and large when it rotates counterclockwise.

[0066] Compared with Example 1 and Example 2, the main differences between the two are:

[0067] In Example 1, when the damping fluid flows from end face A to end face B, the main flow undergoes a large angular momentum change of 105° at node ④. When the damping fluid flows from end face B to end face A, the main flow undergoes a 30° angular momentum change at node ③. The angle at which the main flow and the tributary meet at node ③ is 30°.

[0068] In Example 2, when the damping fluid flows from end face A to end face B, the main flow undergoes a large 150° momentum change at node ④. When the damping fluid flows from end face B to end face A, the main flow undergoes a 75° momentum change at node ③. The angle at which the main flow and the tributary meet at node ③ is 75°.

[0069] Therefore, compared with Example 2, the damping variation of the roller shaft 1 in Example 1 is greater when the roller shaft 1 rotates in different directions.

[0070] Example 3

[0071] like Figure 7 As shown, the angles between the flow channels are different from those in Example 1. The angle between flow channel 1 15 and flow channel 3 17 is α = 30°, the angle between flow channel 15 and flow channel 2 16 is β = 40°, and the angle between flow channel 2 16 and flow channel 3 17 is γ = 110°. The rest of the structure is exactly the same as in Example 1.

[0072] like Figure 2 、 7 8, the working principle is the same as that of Example 1. Compared with Example 1 and Example 3, the main differences between the two are:

[0073] In Example 1, when the damping fluid flows from end face A to end face B, the main flow undergoes three large-angle momentum changes of 105° at nodes ②, ④, and ⑥. The angle at which the main flow and the tributary flow meet at nodes ③, ⑤, and ⑦ is 75°.

[0074] In Example 3, when the damping fluid flows from end face A to end face B, the main flow undergoes three large-angle momentum changes of 140° at nodes ②, ④, and ⑥. The angle at which the main flow and the tributary flow meet at nodes ③, ⑤, and ⑦ is 110°.

[0075] Therefore, compared with Example 1, the damping variation of Example 3 is greater when the roller shaft 1 rotates in different directions.

[0076] Example 4

[0077] like Figure 9 As shown, the number and structure of the diversion grooves 14 are the same as those in embodiment 3, and the connection method is the same as that in embodiment 2.

[0078] like Figure 2 、 9 , 10, the working principle is the same as that of embodiment 3. Compared with embodiment 3 and embodiment 4, the main difference between the two is that:

[0079] In Example 3, when the damping fluid flows from end face A to end face B, the main flow undergoes a large angle momentum change of 70° at node ④. When the damping fluid flows from end face B to end face A, the angle at which the main flow and the tributary flow meet at node ③ is 30°.

[0080] In Example 4, when the damping fluid flows from end face A to end face B, the main flow undergoes a large angle momentum change of 150° at node ④. When the damping fluid flows from end face B to end face A, the angle at which the main flow and the tributary flow meet at node ③ is 40°.

[0081] Therefore, compared with Example 3, the damping variation of Example 4 is greater when the roller 1 rotates in different directions.

[0082] In summary, the above embodiments can all achieve different damping effects in different rotation directions of the damper. The damping change of the variable damper of embodiment 4 is the largest, and that of embodiment 2 is the smallest. However, considering the actual processing, the projection of the diverter groove 14 structure in embodiment 1 on the plane is an isosceles triangle with α=30°. Each flow channel processed on the inner wall of the lower shell 2 is a plane curve, and for an angle of 30°, the processing is very convenient. The flow channels in embodiments 2, 3, and 4 are all spatial curves, which are more difficult to process. In addition, each flow channel 6 structure in embodiment 1 is along the roller axis. The space occupied in the axial direction of 1 is the smallest, and more flow grooves 6 can be processed to change the size of the damping change, so that the damping size in different rotation directions meets the actual needs and avoids excessive or insufficient damping. Therefore, embodiment 1 is the preferred solution. In addition, to ensure the effect of the damper, it is necessary to improve the processing accuracy, ensure that the flow cross-section of the flow groove 6 is uniform, and the size and angle meet the requirements, the outer surface of the loose-leaf 5 is tightly fitted with the inner wall of the upper shell 3, and the outer surface of the roller 1 is tightly fitted with the inner wall of the lower shell 3, so that the damping fluid flows only through the flow groove 6 as much as possible to achieve the change of damping.

[0083] The flow channel 6 of the present invention can also be expanded in a plane and used in a planar structure to achieve changes in the damping of the structure in two opposite directions.

[0084] The above illustrates and describes the basic principles and main structural features of the present invention. The present invention is not limited to the above examples. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An axially rotating variable damper, characterized in that: The invention comprises a cylindrical sealed shell filled with damping fluid, a roller shaft (1), and a loose leaf (5) arranged on the roller shaft (1) and located in the shell; The shell comprises a semi-cylindrical upper shell (3) and a semi-cylindrical lower shell (2) with different inner wall radii, and end covers (4) with central holes at both ends of the shell; The movable leaf (5) is a strip-shaped body arranged on the outer surface of the roller shaft (1) along the axis; The inner wall of the upper shell (3) is tightly fitted with the outer surface of the movable leaf (5), and the inner wall of the lower shell (2) is tightly fitted with the outer surface of the roller shaft (1); The surfaces of the lower shell (2) and the upper shell (3) fixedly connected are the A end surface (10) and the B end surface (11), respectively. The lower shell (2) is provided with a plurality of flow grooves (6) extending from the A end surface (10) along the inner wall to the B end surface (11), each of the flow grooves (6) including n branch grooves (14) located on the inner wall of the lower shell (2) and connected in sequence, and an A end surface main flow groove (12) opened on the A end surface and a B end surface main flow groove (13) opened on the B end surface, which are connected through the branch grooves (14); The diverter groove (14) comprises three flow channels connected to form a triangle, and adjacent diverter grooves (14) are connected via one of three nodes formed by the three flow channels. All the diverter grooves (14) are connected together so that the damping of the damping fluid flowing from the main flow groove (12) on the A end surface to the main flow groove (13) on the B end surface is greater than the damping of the damping fluid flowing from the main flow groove (13) on the B end surface to the main flow groove (12) on the A end surface. The three flow channels are flow channel 1 (15), flow channel 2 (16) and flow channel 3 (17), the angle between flow channel 1 (15) and flow channel 3 (17) is α, the angle between flow channel 1 (15) and flow channel 2 (16) is β, and the angle between flow channel 2 (16) and flow channel 3 (17) is γ, wherein 15°≤α≤45°, β is an acute angle, and there are four flow channels passing through the node between adjacent diversion grooves (14). The two flow channels are connected, and the included angle between them is 180°. The two flow channels with an included angle of 180° are not both flow channels 2 (16). The included angle between the other two flow channels is α, β or γ. The flow channel 1 (15) and the flow channel 3 (17) of the first branch channel (14) are connected to the main flow channel (12) of the A end face. The included angle between the flow channel 1 (15) of the first branch channel (14) and the main flow channel (12) of the A end face is 180°. The connection method of two adjacent diversion grooves (14) among the n diversion grooves (14) includes: First connection mode: the angle between the flow channel 3 (17) of the i-th diverter trough (14) and the flow channel 3 (17) of the i+1-th diverter trough (14) is 180°, and the angle between the flow channel 2 (16) of the i-th diverter trough (14) and the flow channel 1 (15) of the i+1-th diverter trough (14) is β, where i is an odd number and is less than n; The included angle between the flow channel 1 (15) of the j-th diverter trough (14) and the flow channel 1 (15) of the j+1-th diverter trough (14) is 180°, and the included angle between the flow channel 2 (16) of the j-th diverter trough (14) and the flow channel 3 (17) of the j+1-th diverter trough (14) is γ, where j is an even number and is less than n; Second connection mode: the angle between the flow channel 3 (17) of the i-th diverter trough (14) and the flow channel 1 (15) of the i+1-th diverter trough (14) is 180°, and the angle between the flow channel 2 (16) of the i-th diverter trough (14) and the flow channel 2 (16) of the i+1-th diverter trough (14) is α, where i is an odd number and is less than n; The included angle between the flow channel 2 (16) of the j-th diversion trough (14) and the flow channel 1 (15) of the j+1-th diversion trough (14) is 180°, and the included angle between the flow channel 3 (17) of the j-th diversion trough (14) and the flow channel 3 (17) of the j+1-th diversion trough (14) is β, where j is an even number and is less than n.

2. The axially rotating variable damper according to claim 1, characterized in that: When two adjacent diversion troughs (14) adopt the first connection mode, When n is an even number, the angle between the flow channel 1 (15) of the nth branch groove (14) and the main groove (13) on the B end surface is 180°; When n is an odd number, the angle between the flow channel 3 (17) of the nth branch groove (14) and the main groove (13) on the B end surface is 180°.

3. The axially rotating variable damper according to claim 1, characterized in that: When two adjacent diversion troughs (14) adopt the second connection mode, When n is an even number, the angle between the second flow channel (16) of the nth branch flow channel (14) and the main flow channel (13) on the B end surface is 180°; When n is an odd number, the angle between the flow channel 3 (17) of the nth branch groove (14) and the main groove (13) on the B end surface is 180°.

4. The axially rotating variable damper according to any one of claims 1 to 3, characterized in that: β=γ.

5. The axially rotating variable damper according to any one of claims 1 to 3, characterized in that: γ is an obtuse angle.

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