Damper system

Abstract

The present invention provides a damper system comprising: a damper housing configured to form a damping liquid accommodation space to be capable of accommodating a damping liquid; one end of the damping rotating shaft is located in the damping liquid containing space, and the other end of the damping rotating shaft can be connected with the load rotating shaft; the first resistance structure is configured to be fixedly connected with the damper shell; the second resistance structure is configured to be fixedly connected with one end part of the damping rotating shaft; wherein the first resistance structure and the second resistance structure are both located in the damping liquid containing space, and when the load rotating shaft rotates relative to the damper shell, damping liquid buffering force is generated between the first resistance structure and the second resistance structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of health, in particular to a damper system. BACKGROUND

[0002] With the popularization of the demand for pressure oxygen health care and auxiliary rehabilitation, the experience requirements for pressure oxygen cabins in the civilian market are becoming higher and higher, and the hardware pressure oxygen cabin is much better than the software oxygen cabin in terms of user experience.

[0003] As a pressure-bearing device, the oxygen cabin needs to be sealed to ensure pressure. In the design of the hatch of the pressure cabin, especially in the case of an outward-opening door, the internal pressure is higher than the external pressure, so a reliable locking structure is needed to ensure the reliable closure of the hatch during use, that is, the action point of the locking action of the hatch needs to be evenly distributed compared to the entire hatch.

[0004] In the field of manned pressure cabins, the outward-opening door needs to be locked, and in order to ensure uniform pressure distribution, a circular hatch is preferred. In the case of high pressure, the hatch structure is heavy, and the opening and closing position size needs to be very accurate during installation and use. Generally, the shaft part has inherent gaps, which often change the shape and size during use, which affects the opening and closing action and sealing.

[0005] On the other hand, the inertia of heavy hatches is large during opening and closing, and in some accidental situations, it may cause personal injury to the user. In some heavy load hinged connections, the rotational inertia of the rotating part is large, which may cause safety hazards. In similar heavy load vertical shaft rotating door scenarios, many scenarios require a relatively uniform and slow action during opening and closing. The current technology mainly uses friction plate or push rod type buffering schemes. The physical friction of the friction plate scheme is easy to damage and prone to noise, and the adjustability is poor. The damper push rod type has a relatively complex linkage structure, and has certain requirements for installation and working space. The working shaft of the rotating part itself is not coordinated, and the angle of action is limited.

[0006] The sealing is achieved by compressing the sealing gasket, which is exactly opposite to the pressure-bearing direction, resulting in the risk of sealing failure when the pressure is high. In addition, this method needs to overcome the rebound force of the sealing gasket during the closing action of the hatch, which is particularly laborious. SUMMARY

[0007] The purpose of the present application is to provide a damper system to solve the problem that the existing oxygen cabin hatch is difficult to operate.

[0008] To solve at least one of the above technical problems, the present application provides a damper system, comprising:

[0009] The damper housing is configured to form a damping liquid containing space to contain damping liquid;

[0010] a damping shaft configured to have one end located in the damping liquid accommodating space and the other end capable of connecting the load shaft;

[0011] a first resistance structure configured to be fixedly connected with the damper shell; and

[0012] a second resistance structure configured to be fixedly connected with one end of the damping shaft;

[0013] wherein the first resistance structure and the second resistance structure are both located in the damping liquid accommodating space, and when the load shaft rotates relative to the damper shell, damping liquid buffering force is generated between the first resistance structure and the second resistance structure.

[0014] Optionally, in the damper system, the damping shaft comprises:

[0015] a damping shaft connecting end, which is an end of the damping shaft extending out of the damper shell and is axially connected with the load shaft;

[0016] a damping shaft body configured to axially connect the second resistance structure; and

[0017] a damping shaft bottom, which is an end of the damping shaft accommodated in the damper shell and is movably connected with the bottom of the damper shell.

[0018] Optionally, in the damper system, the damper shell comprises:

[0019] a seat shell configured to have an opening at one end to form a hollow cylinder body for the damping shaft extending close to the damping shaft connecting end;

[0020] a seat shell fixed end configured to be fixedly connected with the static load structure when the load shaft is used as the dynamic load structure; and

[0021] a cover plate configured to cover the gap between the opening at one end of the seat shell and the damping shaft.

[0022] Optionally, in the damper system,

[0023] the first resistance structure is a seat shell limiting wing, one end of which is connected to the inner side surface of the seat shell and the other end has a first gap with the damping shaft body;

[0024] the second resistance structure is a shaft movable wing, one end of which is connected to the shaft side surface of the damping shaft body and the other end has a second gap with the inner side surface of the seat shell;

[0025] the seat shell limiting wing limits the rotation angle of the shaft movable wing.

[0026] Optionally, in the damper system, the seat shell comprises:

[0027] a seat shell sealing groove configured to accommodate a cover plate sealing ring to seal a gap between the cover plate and the damping shaft;

[0028] a bottom shaft seat configured as a groove of the seat shell bottom to accommodate the damping shaft bottom adaptively; and

[0029] a seat shell thread configured to be adaptively thread-connected with the cover plate.

[0030] Optionally, in the damper system, the cover plate comprises:

[0031] a locking hole configured to drive the cover plate to rotate to lock the cover plate thread with the seat shell thread;

[0032] a liquid injection hole configured to penetrate the cover plate to make the damping liquid enter the damping liquid accommodating space;

[0033] a cover plate thread configured to be adaptively thread-connected with the thread on the seat shell opening; and

[0034] a shaft sealing groove configured to be sealingly connected with the damping shaft near the damping shaft connecting end.

[0035] Optionally, in the damper system, further comprising:

[0036] a liquid injection plug configured to seal the liquid injection hole;

[0037] a cover plate sealing ring configured to be accommodated in the seat shell sealing groove to seal a gap between the cover plate and the seat shell opening; and

[0038] a shaft sealing member configured to be accommodated in the shaft sealing groove to seal a gap between the cover plate and the damping shaft.

[0039] Optionally, in the damper system,

[0040] the first gap comprises a fixed wing radial gap;

[0041] the second gap comprises a moving wing radial gap and a moving wing axial gap;

[0042] after the liquid injection and sealing are completed, a space filled with the damping liquid is formed between the seat shell, the damping shaft and the cover plate, and the moving wing radial gap and the moving wing axial gap exist between the moving wing of the damping shaft and the seat shell and the cover plate; the fixed wing radial gap is formed between the damping shaft and the seat shell limiting wing.

[0043] Optionally, in the damper system,

[0044] When the damping shaft needs to rotate, the damping liquid is pushed by the movable wing of the shaft to rotate, the damping liquid has incompressibility, and the damping liquid flows reversely through the first gap and / or the second gap to the rear of the relative rotation direction of the limiting wing of the seat shell and the movable wing of the shaft.

[0045] Optionally, in the damper system,

[0046] The flow area formed by the first gap and / or the second gap is related to the required resistance during relative rotation;

[0047] The viscosity of the injected damping liquid is related to the required resistance during relative rotation;

[0048] The axial gap of the movable wing is adjusted by adjusting the locking hole on the cover plate to adjust the resistance.

[0049] In the damper system provided by the application, the first resistance structure connected to the damper shell and the second resistance structure connected to the damping shaft are both in the damping liquid containing space, and the damping liquid buffer force is generated between the first resistance structure and the second resistance structure as the load shaft rotates relative to the damper shell, thereby realizing the buffer resistance. When applied to heavy load hinged rotation, the liquid damping buffer structure is simple and has high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 The overall structure diagram of the oxygen cabin door provided by an embodiment of the application is shown.

[0051] Figure 2 The swing arm structure diagram of the oxygen cabin door provided by an embodiment of the application is shown.

[0052] Figure 3 The hinge shaft structure diagram of the oxygen cabin door provided by an embodiment of the application is shown.

[0053] Figure 4 The door body center shaft structure diagram of the oxygen cabin door provided by an embodiment of the application is shown.

[0054] Figure 5 The overall structure diagram of the damper system suitable for the oxygen cabin door provided by an embodiment of the application is shown.

[0055] Figure 6 The end face cover plate diagram of the damper system suitable for the oxygen cabin door provided by an embodiment of the application is shown.

[0056] Figure 7 The internal structure cross-sectional diagram of the damper system suitable for the oxygen cabin door provided by an embodiment of the application is shown.

[0057] Figure 8Internal structure exploded view of the damper system for the hatch of the oxygen cabin according to an embodiment of the present application;

[0058] Figure 9 Working limit position view of the damper system for the hatch of the oxygen cabin according to an embodiment of the present application;

[0059] Figure 10 Structure view of the hatch sealing device for the hatch of the oxygen cabin according to an embodiment of the present application;

[0060] Figure 11 Structure view of the hatch sealing device for the hatch of the oxygen cabin in the unsealed state according to an embodiment of the present application;

[0061] Figure 12 Structure view of the hatch sealing device for the hatch of the oxygen cabin in the sealing process according to an embodiment of the present application;

[0062] In the figure: 101 - swing arm; 102 - swing arm bearing seat; 103 - swing arm sliding groove end; 111 - Z-direction fine adjustment bolt; 112 - end cover; 113 - aligning bearing; 114 - thrust bearing; 115 - door body rotating shaft / door body center shaft; 116 - end cover bolt; 121 - Y-direction fine adjustment bolt; 122 - sliding groove fixing bolt; 123 - Y-direction locking bolt; 124 - X-direction push adjustment bolt; 125 - X-direction pull adjustment bolt; 130 - hinge shaft assembly; 131 - hinge shaft sleeve; 132 - sliding groove body; 133 - sliding groove; 134 - sliding groove body end face; 135 - X-direction pull adjustment bolt hole; 136 - hinge shaft sleeve top pin; 141 - sliding block nut; 142 - hinge shaft body; 143 - upper hinge shaft damper; 144 - upper hinge shaft end seat; 145 - stop nut; 146 - lower hinge shaft damper; 147 - lower hinge shaft end seat; 201 - movable door frame; 202 - movable door frame buckle; 203 - door body; 204 - movable sealing surface; 205 - sealing protruding ring; 206 - movable guide corner; 301 - fixed door frame; 302 - fixed door frame buckle; 303 - sealing ring groove; 401 - sealing ring; 402 - fixed wing edge; 403 - sealing lip; 404 - support lip; 405 - inner inclined surface of sealing lip; 406 - end face of sealing lip; 407 - lip sealing surface; 408 - guide surface of support lip; 409 - fixed surface of support lip; 410 - sealing back gap; 411 - guide surface of sealing lip; 1101 - seat shell; 1102 - fixed end of seat shell; 1103 - limiting wing of seat shell; 1104 - sealing groove of seat shell; 1105 - bottom shaft seat; 1106 - thread of seat shell; 1111 - damping rotating shaft; 1112 - connecting end of damping rotating shaft; 1113 - movable wing of rotating shaft; 1114 - bottom of damping rotating shaft; 1121 - cover plate; 1122 - locking hole; 1123 - liquid injection hole; 1124 - thread of cover plate; 1125 - shaft seal groove; 1131 - liquid injection plug; 1132 - sealing ring of cover plate; 1133 - shaft seal member; 1134 - damping liquid; s1 - radial gap of movable wing; s2 - radial gap of fixed wing; s3, s4 - axial gap of movable wing. DETAILED DESCRIPTION

[0063] The application will be further described below with reference to the specific embodiments and the accompanying drawings.

[0064] It should be noted that the components in the various drawings can be exaggerated for illustration purposes and are not necessarily drawn to scale. In the various drawings, the same or similar components are provided with the same reference numerals.

[0065] In the present application, unless specifically indicated, "arranged on", "arranged above" and "arranged over" do not exclude the presence of an intermediate object between them. In addition, "arranged on or above" only indicates the relative position relationship between the two components, and in some cases, such as after reversing the product direction, it can also be converted to "arranged below or below", and vice versa.

[0066] In the present application, each embodiment is merely intended to illustrate the solution of the present application and should not be understood as limiting.

[0067] In the present application, the quantifier "one" does not exclude the scenario of multiple elements unless specifically indicated.

[0068] It should also be noted herein that, in the embodiments of the present application, only a part of components or assemblies can be shown for the sake of clarity and simplicity, but those skilled in the art can understand that, under the teaching of the present application, the required components or assemblies can be added according to the specific scenario. In addition, the features in different embodiments of the present application can be combined with each other unless otherwise stated. For example, a feature in the second embodiment can replace the corresponding or functionally similar feature in the first embodiment, and the resulting embodiment also falls within the disclosure or recitation range of the present application.

[0069] It should also be noted herein that, within the scope of the present application, the expressions "same", "equal", "equal to" and the like do not mean that the numerical values of the two are absolutely equal, but allow a certain reasonable error, that is, the expressions also cover "substantially the same", "substantially equal", "substantially equal to". By analogy, in the present application, the terms "perpendicular to", "parallel to" and the like also cover the meanings of "substantially perpendicular to", "substantially parallel to".

[0070] In addition, the numbering of the steps of each method of the present application does not limit the execution order of the method steps. Unless specifically indicated, each method step can be executed in a different order.

[0071] The oxygen cabin door proposed in the present application is further described in detail below in combination with the drawings and specific embodiments. The advantages and features of the present application will be clearer according to the following description. It should be noted that the drawings are all very simplified and use non-precise proportions, only for the purpose of facilitating and clearly assisting the description of the embodiments of the present application.

[0072] The present application aims to provide an oxygen cabin door to solve the problem of high operation difficulty of the existing oxygen cabin door.

[0073] To achieve the above-mentioned purpose, the present application provides an oxygen cabin door, which comprises Figures 1-4The oxygen cabin door is shown to include: a hinge shaft configured to be connected between the cabin body and the swing arm 101 to enable the swing arm 101 to rotate around an axis perpendicular to the bottom plane of the cabin body; the swing arm 101 configured to be fixedly connected at one end to the hinge shaft and axially rotatably connected at the other end to the central shaft of the disc-shaped door body; and the door body 203 configured to be disc-shaped to be able to be buckled to the passage of the human body entering and exiting the cabin body; wherein when the door body 203 rotates around the central shaft, the buckle structure on the door body 203 can slide into the clamping groove structure on the cabin body to offset the atmospheric pressure acting on the door body.

[0074] In an embodiment of the present application, in the oxygen cabin door, the door body 203 includes: a movable door frame 201 configured to have at least one radial protrusion distributed on the edge of the movable door frame buckle 202 as the buckle structure on the door body; and a door body window configured to be made of transparent acrylic material and have a door body central shaft at the center thereof.

[0075] In an embodiment of the present application, in the oxygen cabin door, the cabin body includes: a cabin body proper; a fixed door frame 301 configured to have at least one radial protrusion distributed on the edge of the fixed door frame buckle 302 as the clamping groove on the cabin body; and a sealing ring 401 configured to be accommodated between the fixed door frame 301 and the cabin body proper; wherein the sealing ring 401 can engage the movable door frame 201 to perform sealing; when the door body 203 is rotated around the door body rotating shaft 115 after being closed, the movable door frame buckle 202 cooperates with the fixed door frame buckle 302 to form a locking action; when the door body 203 and the swing arm 101 are rotated to be closed along the hinge shaft, the movable sealing surface 204 of the movable door frame 201 is inserted into the sealing ring 401 to complete the tight sealing action with the sealing ring 401.

[0076] In an embodiment of the present application, in the oxygen cabin door, the hinge shaft includes: a hinge shaft assembly 130 configured to drive the sliding groove body 132 to rotate around an axis perpendicular to the bottom plane of the cabin body; and the sliding groove body 132 configured to guide the swing arm 101 to slide in to be perpendicular to the hinge shaft assembly 130.

[0077] In one embodiment of the present application, the hinge shaft assembly 130 of the cabin door comprises: a hinge shaft upper end seat 144 configured to be connected between the cabin body and the hinge shaft upper damper 143 as an upper end support of the hinge shaft body 142; a hinge shaft lower end seat 147 configured to be connected between the cabin body and the hinge shaft lower damper 146 as a lower end support of the hinge shaft body 142; the hinge shaft upper damper 143 configured to be dampedly connected between the hinge shaft upper end seat 144 and the hinge shaft body 142; the hinge shaft lower damper 146 configured to be dampedly connected between the hinge shaft lower end seat 147 and the hinge shaft body 142; the hinge shaft body 142 configured to be connected between the hinge shaft upper damper 143 and the hinge shaft lower damper 146; a hinge shaft sleeve 131 configured to be sleeved on the outside of the hinge shaft body 142; a hinge shaft sleeve top screw 136 configured to fix the hinge shaft body 142 and the hinge shaft sleeve 131; and a stop nut 145 configured to have its upper end surface in contact with the lower end surface of the hinge shaft sleeve 131 and to be screwed with the hinge shaft at the end close to the hinge shaft lower damper 146.

[0078] In one embodiment of the present application, the sliding groove body 132 of the cabin door comprises: a sliding groove 133 configured to provide a sliding channel for the sliding block nut 141; a sliding groove body end surface 134 configured to be screwed with the end of the swing arm 101 close to the hinge shaft so as to align the sliding groove body 132 with the swing arm 101; and the sliding block nut 141 configured to be able to slide in the sliding groove 133 in a direction parallel to the length of the swing arm 101.

[0079] In one embodiment of the present application, the swing arm 101 of the cabin door comprises: a door body rotating shaft 115 configured as a central shaft 115 of the door body; a swing arm bearing seat 102 configured to be bearing-connected between the end of the swing arm 101 away from the hinge shaft and the door body rotating shaft 115; an end cover 112 arranged at the center of the swing arm bearing seat 102 and covering the end of the door body rotating shaft 115 and the self-aligning bearing 113; an end cover bolt 116 configured to fix the end cover 112 to the end of the door body rotating shaft 115; the self-aligning bearing 113 arranged between the radially outer side surface of the door body rotating shaft 115 and the radially inner side surface of the swing arm bearing seat 102 so as to be rotationally connected between the door body rotating shaft 115 and the swing arm bearing seat 102 and to adjust the perpendicularity of the door body rotating shaft 115 to the rotation plane; a thrust bearing 114 arranged at the outer ring of the self-aligning bearing 113 and accommodated in the groove on the bottom surface of the swing arm bearing seat 102 facing the door body; and a swing arm sliding groove end 103 configured to be screwed with the sliding groove body 132 at the end of the swing arm 101 close to the hinge shaft.

[0080] In one embodiment of the present application, the oxygen cabin door further comprises: a Z-direction fine adjustment bolt 111 configured to pass through a Z-direction fine adjustment bolt hole on the swing arm bearing seat 102 and connect with the thrust bearing 114 to adjust the Z-direction gap between the swing arm bearing seat 102 and the door body rotating shaft 115; a sliding groove fixing bolt 122 configured to pass through a sliding groove fixing bolt hole on the swing arm sliding groove end 103 and fix with a sliding nut in the sliding groove body 132; a Y-direction fine adjustment bolt 121 arranged on the upper side of the swing arm sliding groove end 103 and threadedly connected with a Y-direction fine adjustment bolt hole of the swing arm sliding groove end 103 to adjust the relative height of the swing arm sliding groove end 103 and the sliding groove body 132; a Y-direction locking bolt 123 arranged on the lower side of the swing arm sliding groove end 103 and locking a Y-direction locking bolt hole of the swing arm sliding groove end 103 to fix the relative height of the swing arm sliding groove end 103 and the sliding groove body 132; an X-direction push adjustment bolt 124 arranged on the end face of the swing arm sliding groove end 103 close to the sliding groove body 132 and locking an X-direction push adjustment bolt hole of the swing arm sliding groove end 103 to fix the horizontal relative distance of the swing arm sliding groove end 103 and the sliding groove body 132; and an X-direction pull adjustment bolt hole 135 arranged on the end face of the swing arm sliding groove end 103 close to the sliding groove body 132 and locking an X-direction pull adjustment bolt hole 135 of the swing arm sliding groove end 103 to fix the horizontal relative distance of the swing arm sliding groove end 103 and the sliding groove body 132.

[0081] In one embodiment of the present application, in the oxygen cabin door, the horizontal position size of the swing arm 101 relative to the center of the hinge shaft is adjusted by locking the X-direction pull adjustment bolt 125 or locking the X-direction push adjustment bolt 124 under the condition that the sliding groove fixing bolt 122 is loosened, so as to achieve the X-direction fine adjustment action; when there is a gap between the swing arm 101 and the sliding groove body 132, the Y-direction locking bolt 123 is locked, so that the relative position in the Y-direction is kept when the horizontal position in the X-direction is adjusted; the swing arm 101 and the sliding groove body 132 are adjusted as a whole in the Y-direction by rotating the rotation locking nut 145 when the swing arm 101 is adjusted as a whole in the Y-direction; and the Z-direction gap between the door body and the door body rotating shaft 115 is adjusted by tightening and releasing the Z-direction fine adjustment bolt 111.

[0082] In one embodiment of the present application, in the oxygen cabin door, when the flatness of the door body relative to the fixed door frame 301 is adjusted, the Z-direction fine adjustment bolt 111 on the swing arm bearing seat 102 is rotated to adjust the inclination of the door body relative to the door body rotating shaft 115; and when the overall Z-direction position size of the door body is adjusted, the Z-direction fine adjustment bolt 111 and the end cover bolt 116 on the end cover 112 of the door body rotating shaft 115 are rotated to adjust the Z-direction size of the door body relative to the plane of the swing arm 101.

[0083] In the cabin door provided by the application, one end of the swing arm 101 is connected with the cabin body through a hinge shaft, and the other end is axially rotatably connected with the central shaft of the disc-shaped door body, so that when the swing arm 101 drives the door body to close, the door body rotates around the central shaft, and the buckle structure on the door body can slide into the clamping groove structure on the cabin body to offset the atmospheric pressure acting on the door body. Although the pressure inside the oxygen cabin is higher than the pressure outside the cabin, the reliable locking structure of the application ensures the reliable closing of the cabin door in use.

[0084] The swing arm sliding groove end 103 at the tail of the swing arm 101 is fixed with the sliding block nut 141 placed in the sliding groove of the sliding groove body 132 through the sliding groove fixing bolt 122 and the sliding groove of the shaft assembly, and in the case of loosening the sliding groove fixing bolt 122, the horizontal position size of the swing arm 101 relative to the center of the hinge shaft can be realized by locking the X-direction pull adjusting bolt 125 or the X-direction push adjusting bolt 124, so as to achieve the X-direction fine adjustment action; when adjusting the size, there is a gap between the swing arm 101 and the sliding groove body 132, and the Y-direction locking screw is needed to ensure that the Y-direction does not deviate when the X-direction is adjusted; the whole Y-direction adjustment of the swing arm 101 can be realized by rotating the rotation stop nut 145 to make the whole Y-direction adjustment of the sliding groove body 132 and the swing arm 101; this mode is suitable for large-scale adjustment, and in the case of needing fine adjustment in use, the Y-direction fine adjustment bolt 121 and the Y-direction locking bolt 123 can be used to realize the size fine adjustment within a certain gap.

[0085] The hinge shaft is connected with the upper damper 143 and the lower damper 146 at both ends, the cores of the two dampers are fixed with the hinge shaft body 142 respectively and rotate with the hinge shaft, and the shells of the two dampers are fixed with the upper and lower end seats of the hinge shaft. In this way, the action speed and resistance during the rotation of the door body with the hinge shaft are uniform.

[0086] The swing arm bearing seat 102 is arranged at the front end of the swing arm 101, the self-aligning bearing 113 and the door body rotating shaft 115 are fixed into one rotating range, and the rotation of the door body with the door body rotating shaft 115 is realized; the outer ring of the self-aligning bearing 113 is additionally provided with a thrust bearing 114, one side of which is attached to the door body, and the other side is controlled by the Z-direction fine adjustment bolt 111. When the Z-direction fine adjustment size needs to be adjusted or the parallelism of the whole door body and the door frame needs to be adjusted, the tightening and releasing of the Z-direction fine adjustment bolt 111 can be used to realize the adjustment; during the process, the thrust bearing 114 can realize the adjustment of the Z-direction fine adjustment bolt 111, and the rotation of the door body around the rotating shaft is not affected and can still rotate smoothly; when the door body rotates around the rotating shaft after being closed, the movable door frame buckle 202 structure at the edge cooperates with the fixed door frame buckle 302 structure to form a locking action; when the door body and the swing arm 101 rotate and close with the hinge shaft, the movable sealing surface 204 of the movable door frame 201 is inserted into the sealing ring to complete the tight sealing action with the sealing ring.

[0087] As Figure 4When it is necessary to adjust the flatness of the door body 203 and the fixed door frame 301, the tilt of the door body relative to the pivot can be achieved within a small range by adjusting the Z-axis fine adjustment bolt 111 on the swing arm bearing seat 102; and when adjusting the overall Z-axis position dimension of the door body, the Z-axis dimension of the door body relative to the plane of the swing arm 101 can be controlled by adjusting the Z-axis fine adjustment bolt 111 and the end cap 112 screw on the pivot end cap 112.

[0088] This invention allows for fine-tuning of the hatch position in three dimensions to meet dimensional correction requirements after shape and position deviations during use; the planarity between the moving door frame 201 and the fixed door frame 301 can be fine-tuned to ensure precise fit during opening and closing; a liquid damping device connects the hinge shaft 142 to the upper and lower end seats of the hinge shaft, ensuring uniform hatch opening and closing speed and avoiding the risk of personal injury during operation; the hatch rotation locking action requires minimal operating force, achieving sealing and locking simultaneously in one action.

[0089] The present invention also provides a damper system suitable for oxygen chamber doors, comprising an upper hinge damper 143 and a lower hinge damper 146, such as... Figures 1-9 As shown, it includes: a damper housing configured to form a damping fluid accommodating space to accommodate damping fluid 1134; a damping shaft 1111 configured with one end located in the damping fluid accommodating space and the other end connected to a load shaft; a first resistance structure configured to be fixedly connected to the damper housing; and a second resistance structure configured to be fixedly connected to one end of the damping shaft 1111; wherein both the first resistance structure and the second resistance structure are located in the damping fluid accommodating space, and when the load shaft (hinge shaft body) rotates relative to the damper housing (hinge shaft upper and lower end seats), a damping fluid 1134 buffering force is generated between the first resistance structure and the second resistance structure.

[0090] In one embodiment of the present invention, in the damper system applicable to oxygen chamber doors, the damping shaft 1111 includes: a damping shaft connecting end 1112, which is one end of the damping shaft 1111 extending out of the damper housing and axially connected to a load shaft, the load shaft being a hinge shaft body 142; a damping shaft body 1111, configured to connect a second resistance structure on its axial side; and a damping shaft bottom 1114, which is one end of the damping shaft 1111 housed in the damper housing and movably connected to the bottom of the damper housing.

[0091] In one embodiment of the present application, in the damper system for the oxygen cabin door, the damper housing comprises: a seat shell 1101 configured as a hollow cylinder with an opening at one end to allow the damping shaft 1111 near the damping shaft connecting end 1112 to protrude; a seat shell fixed end 1102 configured to be fixedly connected with a static load structure when the load shaft (hinge shaft body 142) is used as a dynamic load structure, the static load structure being a structure fixed relative to the cabin body, i.e. the hinge shaft upper end seat 144 or the hinge shaft lower end seat 147; and a cover plate 1121 configured to cover the gap between the opening at one end of the seat shell 1101 and the damping shaft 1111.

[0092] In one embodiment of the present application, in the damper system for the oxygen cabin door, the first resistance structure is a seat shell limiting wing 1103, one end of which is connected to the inner side of the seat shell 1101 and the other end of which has a first gap with the damping shaft body 1111; the second resistance structure is a shaft movable wing 1113, one end of which is connected to the shaft side of the damping shaft body 1111 and the other end of which has a second gap with the inner side of the seat shell 1101; the seat shell limiting wing 1103 limits the rotation angle of the shaft movable wing 1113.

[0093] In one embodiment of the present application, in the damper system for the oxygen cabin door, the seat shell 1101 comprises: a seat shell sealing groove 1104 configured to accommodate the cover plate sealing ring 1132 to seal the gap between the cover plate 1121 and the damping shaft 1111; a bottom shaft seat 1105 configured as a groove at the bottom of the seat shell 1101 to accommodate the damping shaft bottom 1114 adaptively; and a seat shell thread 1106 configured to be adaptively threadedly connected with the cover plate 1121.

[0094] In one embodiment of the present application, in the damper system for the oxygen cabin door, the cover plate 1121 comprises: a locking hole 1122 configured to drive the cover plate 1121 to rotate so that the cover plate thread 1124 is locked with the seat shell thread 1106; a liquid injection hole 1123 configured to penetrate the cover plate 1121 so that the damping liquid 1134 enters the damping liquid accommodating space; a cover plate thread 1124 configured to be adaptively threadedly connected with the thread on the opening of the seat shell 1101; and a shaft sealing groove 1125 configured to be sealingly connected with the damping shaft 1111 near the damping shaft connecting end 1112.

[0095] In an embodiment of the present application, in the damper system suitable for the oxygen cabin door, the first gap includes a fixed wing radial gap s2; the second gap includes a moving wing radial gap s1 and a moving wing axial gap s3, s4; after the liquid injection and sealing are completed, the space between the seat shell 1101, the damping shaft 1111 and the cover plate 1121 is filled with damping liquid 1134, and the moving wing radial gap and the moving wing axial gap exist between the movable wing 1113 of the damping shaft and the seat shell 1101 and the cover plate 1121; the damping shaft 1111 and the seat shell limiting wing 1103 form a fixed wing radial gap.

[0096] In an embodiment of the present application, in the damper system suitable for the oxygen cabin door, the first gap includes a fixed wing radial gap s2; the second gap includes a moving wing radial gap s1 and a moving wing axial gap s3, s4; after the liquid injection and sealing are completed, the space between the seat shell 1101, the damping shaft 1111 and the cover plate 1121 is filled with damping liquid 1134, and the moving wing radial gap and the moving wing axial gap exist between the movable wing 1113 of the damping shaft and the seat shell 1101 and the cover plate 1121; the damping shaft 1111 and the seat shell limiting wing 1103 form a fixed wing radial gap.

[0097] In an embodiment of the present application, in the damper system suitable for the oxygen cabin door, when the damping shaft 1111 needs to rotate, the damping liquid 1134 is pushed by the movable wing 1113 to rotate, the damping liquid 1134 has incompressibility, and the damping liquid 1134 flows reversely through the first gap and / or the second gap to the rear of the relative rotation direction of the seat shell limiting wing 1103 and the movable wing 1113.

[0098] In an embodiment of the present application, in the damper system suitable for the oxygen cabin door, the flow area formed by the first gap and / or the second gap is related to the required resistance in the relative rotation process; the viscosity of the injected damping liquid 1134 is related to the required resistance in the relative rotation process; the moving wing axial gap is adjusted by adjusting the locking hole 1122 on the cover plate 1121 to adjust the resistance.

[0099] In the damper system suitable for the oxygen cabin door provided by the present application, the first resistance structure connected to the damper shell and the second resistance structure connected to the damping shaft 1111 are both in the damping liquid containing space, and the damping liquid 1134 buffering force is generated between the first resistance structure and the second resistance structure as the load shaft rotates relative to the damper shell, thereby achieving the buffering resistance. When applied to heavy load hinged rotation, the liquid damping buffering structure is simple and has high reliability.

[0100] The bottom of the seat shell 1101 is provided with a bottom shaft seat 1105 for rotationally connecting with the damping shaft 1111, the inner wall of the cavity is provided with a seat shell limiting wing 1103 for limiting the action range of the shaft movable wing 1113 of the damping shaft 1111, the outside is provided with a seat shell fixed end 1102 for installing and fixing the seat shell 1101;

[0101] The damping shaft 1111 is provided at the top end with a damping shaft connecting end 1112 for connecting with the rotating shaft requiring damping and buffering, the damping shaft body 1111 is provided with a shaft movable wing 1113 for generating damping effect with the damping liquid 1134 in the movement, and the bottom is provided with a damping shaft bottom 1114 for cooperating with the bottom shaft seat 1105 of the seat shell 1101 for rotation;

[0102] The cover plate 1121 is provided on the outside with a pair of locking holes 1122 which are blind holes for rotating the cover plate 1121 with the seat shell 1101 by using tools during assembly, and the connection is realized by cooperating the cover plate thread 1124 provided on the cover plate 1121 with the seat shell thread 1106 provided on the seat shell 1101; the end surface is provided with a liquid injection hole 1123 for injecting the damping liquid 1134 into the cavity of the seat shell 1101 after assembly, and the liquid injection hole 1123 is sealed by the liquid injection plug 1131 after the liquid injection is completed; the center hole part of the cover plate 1121 is rotationally matched with the damping shaft 1111, the inner side of the neck part is provided with a shaft seal groove 1125 for installing the shaft seal 1133 to realize that the damping liquid 1134 in the cavity of the seat shell 1101 does not flow out during the rotation of the damping shaft 1111;

[0103] After the assembly of the device is completed and the liquid injection and sealing are completed, a space filled with the damping liquid 1134 is formed between the seat shell 1101, the damping shaft 1111 and the cover plate 1121, and the dynamic wing radial gap s1, the dynamic wing axial gap s3 and s4 exist between the shaft movable wing 1113 and the seat shell 1101 and the cover plate 1121; and the fixed wing radial gap s2 is formed between the damping shaft 1111 and the seat shell limiting wing 1103.

[0104] When the damping shaft 1111 needs to rotate, it needs to move the damping liquid 1134 to realize the rotation, and because the cavity is filled with the incompressible damping liquid 1134, the damping liquid 1134 must flow to the rear of the shaft movable wing 1113 in the reverse direction of the movement direction of the damping shaft 1111 along the gaps s1-s4 during the rotation to realize the rotation action of the shaft.

[0105] During rotation, the damping effect is related to the flow cross-sectional area formed by the gaps s1 to s4, as well as the viscosity of the injected damping fluid 1134. In practice, the overall damping can be fine-tuned by adjusting the axial gaps s3 and s4 of the moving wing through the locking hole 1122 on the cover plate 1121, while ensuring a reliable seal. When a larger adjustment range is required, the damping fluid 1134 with a wider viscosity range can be used, combined with the aforementioned adjustment of the axial gaps s3 and s4 of the moving wing, to achieve the desired damping and buffering effect.

[0106] The damper system for oxygen chamber doors provided by this invention has a very simple structure with few parts; very few moving parts, which are sealed in a confined space, making them less susceptible to contamination and damage; a very wide damping adjustment range, achieving the required buffering effect over a very large range; extremely high damping limit value, meeting the application requirements of heavy-load scenarios; the damping direction is coaxial with the rotation direction, resulting in uniform damping effect during rotation; a very wide rotation angle, with a limit approaching 360 degrees, and consistent damping effect in both directions; and within the permissible strength range, it has no vulnerable parts, is robust and reliable, and has an extremely long service life.

[0107] The present invention also provides a door sealing device suitable for oxygen chamber doors, such as... Figures 1-12 As shown, it includes: a door body 203, configured in a disc shape to engage with a passageway for human entry and exit; a fixed door frame 301, fixed to the edge of the passageway, and including: a fixed door frame latch 302, configured to form a first receiving space for latching the door body 203, so that the gas pressure difference between the inside and outside of the passageway is transmitted from the door body 203 to the fixed door frame latch 302; and a sealing ring groove 303, configured to form a second receiving space for receiving a sealing ring 401, so that the gas pressure difference between the inside and outside of the passageway is transmitted from the sealing ring to the sealing ring groove 303; and a sealing ring 401, configured to make interference contact with the door body 203 engaged with the passageway to seal the gap between the door body 203 and the passageway.

[0108] In one embodiment of the present invention, in the door 203 sealing device, the air pressure inside the channel is greater than the air pressure outside the channel; the fixed door frame 301 is located at the outer edge of the channel; the sealing ring groove 303 is configured such that the groove opening faces the inside of the channel and accommodates the sealing ring 401, so that the gas pressure difference inside and outside the channel is transmitted from the sealing ring 401 to the sealing ring groove 303.

[0109] In one embodiment of the present application, the door body 203 sealing device comprises: a movable door frame 201, which is configured with at least one radial protrusion on the edge of the movable door frame buckle 202; wherein the fixed door frame 301 is configured with at least one radial protrusion on the edge of the fixed door frame buckle 302 to accommodate the movable door frame buckle 202 buckled on the channel; wherein when the sealing ring 401 is engaged with the movable door frame 201 for sealing, the movable sealing surface 204 of the movable door frame 201 is inserted into the sealing ring 401 to complete the tight sealing action with the sealing ring 401.

[0110] In one embodiment of the present application, the door body 203 sealing device further comprises: a door body window, which is configured with transparent acrylic material and has a door body center axis 115 at the center thereof; wherein each movable door frame buckle 202 is uniformly distributed with a first circumferential notch to axially cross and buckle with the fixed door frame buckle 302, the first circumferential notch being larger than the fixed door frame buckle 302; each fixed door frame buckle 302 is uniformly distributed with a second circumferential notch to axially cross and buckle with the movable door frame buckle 202, the second circumferential notch being larger than the movable door frame buckle 202; and after the door body 203 is buckled on the channel, the movable door frame buckle 202 and the fixed door frame buckle 302 are rotated to be aligned to form a locking action.

[0111] In one embodiment of the present application, the door body 203 sealing device further comprises: a sealing protruding ring 205, which is configured to be axially protruded from the outer edge of the movable door frame 201 and towards the inside of the channel; and a movable guide corner 206, which is located at the outer edge of the top end of the sealing protruding ring 205 to be in interference contact with the sealing ring.

[0112] In one embodiment of the present application, the door body 203 sealing device further comprises: a sealing protruding ring 205, which is configured to be axially protruded from the outer edge of the movable door frame 201 and towards the inside of the channel; and a movable guide corner 206, which is located at the outer edge of the top end of the sealing protruding ring 205 to be in interference contact with the sealing ring.

[0113] In one embodiment of the present application, in the door body 203 sealing device, including: in the closing action of the movable door frame 201, the movable sealing surface 204 on the sealing protruding ring 205 of the movable door frame 201 is inserted into the sealing ring; the movable sealing surface 204 on the movable door frame 201 is interference-fitted with the lip sealing surface 407 of the sealing ring, and the movable guide angle 206 of the movable door frame 201 is in contact with the sealing lip guide surface 411 of the sealing ring, so that the lip sealing surface 407 is tightly fitted with the movable sealing surface 204 on the movable door frame 201, and sealing is achieved.

[0114] After the closing action is completed, the movable door frame 201 is rotated, the movable sealing surface 204 slides relative to the lip sealing surface 407 by a certain angle, and the local deformation of the sealing lip 403 caused by the uneven deformation of the sealing lip 403 under the influence of the normal force in the closing process is released; during the rotation of the movable door frame 201, the movable door frame buckle 202 is engaged with the fixed door frame buckle 302, and a locked state is achieved.

[0115] In one embodiment of the present application, in the door body 203 sealing device, including: the back of the sealing lip 403 is a sealing lip inner inclined surface 405, the sealing lip inner inclined surface 405 is at an angle of 5-30 degrees with the sealing surface, forming a structure of the sealing lip 403 with thick root and thin end, when the sealing lip 403 is in interference contact with the movable sealing surface 204, the root of the sealing lip 403 remains unchanged, the end is deformed, forming a tight form around the movable sealing surface 204, avoiding the whole sealing lip 403 being extruded; the end of the sealing lip 403 is a rounded structure, avoiding cracking damage.

[0116] In one embodiment of the present application, in the door body 203 sealing device, including: the support lip 404 of the sealing ring is opposite to the axial protruding direction of the sealing lip 403, and the inner diameter of the support lip 404 is greater than the inner diameter of the sealing lip 403, a support lip guide surface 408 is arranged on the lip of the support lip 404 to avoid the entry of the sealing protruding ring 205 of the movable door frame 201; the back of the support lip 404 is provided with a support lip fixing surface 409, which is in contact with the fixed door frame 301, when in use, the internal pressure causes the local deformation of the sealing lip 403, the sealing lip inner inclined surface 405 is further bent, and is extruded and deformed towards the sealing back gap 410 formed by the sealing ring and the movable sealing surface 204, the support of the support lip 404 prevents the deformation of the sealing lip 403 towards the sealing back gap 410.

[0117] In one embodiment of the present application, in the door body 203 sealing device, including: in the deformed state of the sealing lip 403, the support of the support lip 404 fills the space of the sealing back gap 410, so that the contact area between the sealing back gap 410 and the movable sealing surface 204 is increased.

[0118] In the door body 203 sealing device provided by the application, the gas pressure difference between the inside and outside of the passage is conducted into the door frame buckle 302 by the door frame buckle 302, and the gas pressure difference between the inside and outside of the passage is conducted into the sealing ring groove 303 by the sealing ring groove 303, so that the pressure difference acting on the door body 203 and the sealing ring is synchronously conducted, which is suitable for the case that there is a gas pressure difference between the inside and outside of the passage, and the force of the gas pressure difference acting on the door body 203 and the sealing ring is eliminated, so that the risk of sealing failure caused by the fact that the compression direction of the sealing ring is just opposite to the pressure bearing direction is overcome.

[0119] Further, the door body 203 sealing device of the application is suitable for an oxygen cabin in which the internal atmospheric pressure is higher than the external standard atmospheric pressure, and after the door body 203 sealing device is adopted, the cabin door locking structure is simple, the locking action only needs to be rotated by one angle, the locking force uniformly acts on the cabin door structure, the structural strength is good when bearing pressure, the cabin door sealing structure and the cabin door sealing part do not need to be positively pre-pressed, but only need to be radially pre-pressed, which greatly reduces the operation force when the cabin door is closed. In the pressure bearing work of the sealing ring, the internal pressure forces it to be more closely attached to the cabin door body 203, and it can simultaneously meet the conditions of micro-pressure and heavy pressure, and under the condition that the cabin door structure strength is allowed, the sealing reliability is synchronously increased with the increase of the pressure.

[0120] The fixed wing edge 402 of the sealing ring is installed in the sealing ring groove 303 of the door frame 301 and is fixed with the door frame 301, and in the closing action of the movable door frame 201, the dynamic sealing surface 204 on the sealing protruding ring 205 of the movable door frame 201 is inserted into the sealing ring; because the dynamic sealing surface 204 on the movable door frame 201 and the lip sealing surface 407 of the sealing ring are interference fit, the dynamic guide angle 206 of the movable door frame 201 cooperates with the sealing lip guide surface 411 of the sealing ring to ensure smooth entry, and after the movement is completed, the lip sealing surface 407 is closely attached to the dynamic sealing surface 204 on the movable door frame 201 to achieve sealing.

[0121] After the closing action is completed, the movable door frame 201 is rotated, the dynamic sealing surface 204 and the lip sealing surface 407 slide relative to each other by a certain angle, and the local deformation of the sealing lip 403 caused by the influence of the normal force during the closing process is released. At the same time, during the rotation of the movable door frame 201, the movable door frame buckle 202 is buckled with the door frame buckle 302 on the door frame 301 to achieve the locking state.

[0122] The sealing ring is made of flexible material with certain elasticity, which includes fixed wing edge 402 for fixing with the fixed door frame 301, sealing lip 403 and support lip 404; the back of the sealing lip 403 is a slope, i.e. the inner sealing lip slope 405, which is at an angle with the sealing surface, between 5-30 degrees, forming the structure of the sealing lip 403 body, which is thick at the root and thin at the end, so that the position of the sealing lip 403 remains unchanged during the insertion of the moving door frame 201, only the end deforms, forming a tight form to the moving sealing surface 204 of the moving door frame 201, without the whole sealing lip 403 being extruded; the end face 406 of the sealing lip is a rounded structure, which ensures that the end face 406 of the sealing lip is not easy to crack and damage during use;

[0123] The support lip 404 of the sealing ring is opposite to the sealing lip 403, and the inner diameter size is larger than that of the sealing lip 403, and a support lip guide surface 408 is arranged on the lip edge to avoid the entry of the sealing protruding ring 205 of the moving door frame 201; the back is provided with a support lip fixing surface 409, which is attached to the fixed door frame 301, and during use, the internal pressure causes the sealing lip 403 to locally deform, and the inner sealing lip slope 405 further bends and extrudes into the sealing back gap 410 formed by the sealing ring and the moving sealing surface 204, at this time, due to the support of the support lip 404, it to some extent prevents the sealing lip 403 from further deforming to the sealing back gap 410, thereby ensuring the integrity of the seal when the pressure increases;

[0124] Because the sealing lip 403 and the moving sealing surface 204 are in interference fit, in order to reduce the resistance in the locking and closing action and reduce the wear during use, the sealing lip 403 is designed to be thin, i.e. to reduce the contact surface with the moving sealing surface 204 and the tightness. However, this will cause the sealing lip 403 to deform outward when the pressure increases, and due to the support of the support lip 404, the sealing lip 403 will further fill the space of the sealing back gap 410, increasing the contact area with the moving sealing surface 204 and improving the sealing performance, so that the sealing does not fail as the internal pressure increases.

[0125] In summary, the above embodiments describe different configurations of the cabin door in detail, of course, the present application includes but is not limited to the configurations listed in the above embodiments, any content transformed on the basis of the configurations provided in the above embodiments belongs to the scope protected by the present application. Those skilled in the art can draw conclusions from the above embodiments.

[0126] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0127] The above description is only the description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application. Any change and modification made by the person of ordinary skill in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A damper system, characterized in that, include: The damper housing is configured to form a damping fluid accommodating space to accommodate the damping fluid. The damping shaft is configured such that one end is located in the damping fluid accommodating space, and the other end can be connected to the load shaft. The first drag structure is configured to be fixedly connected to the damper housing; as well as The second resistance structure is configured to be fixedly connected to one end of the damping shaft; Both the first resistance structure and the second resistance structure are located in the damping fluid accommodating space. When the load shaft rotates relative to the damper housing, a damping fluid buffering force is generated between the first resistance structure and the second resistance structure.

2. The damper system as described in claim 1, characterized in that, The damping shaft includes: The damping shaft connection end is the end of the damping shaft that extends out of the damper housing and is axially connected to the load shaft; The damping shaft body is configured to connect a second resistance structure to the shaft side; and The damping shaft bottom is located at one end of the damper housing and is movably connected to the bottom of the damper housing.

3. The damper system as described in claim 2, characterized in that, The damper housing includes: The housing is configured as a hollow cylinder with an opening at one end so that the damping shaft near the connection end of the damping shaft extends out. When the fixed end of the housing is configured as a load shaft for use as a dynamic load structure, it can be fixedly connected to a static load structure; and The cover plate is configured to cover the gap between the opening at one end of the housing and the damping shaft.

4. The damper system as described in claim 3, characterized in that, The first resistance structure is a seat housing limiting wing, one end of which is connected to the inner side of the seat housing, and the other end has a first gap with the damping shaft body. The second drag structure is a rotating shaft movable wing, one end of which is connected to the axial side of the damping rotating shaft body, and the other end has a second gap with the inner side of the seat housing. The housing limiting wing limits the rotation angle of the rotating shaft movable wing.

5. The damper system as described in claim 4, characterized in that, The housing includes: The housing sealing groove is configured to accommodate the cover plate sealing ring to seal the gap between the cover plate and the damping shaft. The bottom bearing seat is configured as a recess in the bottom of the housing to accommodate the damping shaft bottom; and The housing thread is configured to allow for a threaded connection that is compatible with the cover plate.

6. The damper system as described in claim 5, characterized in that, The cover plate includes: The locking hole is configured to drive the cover plate to rotate so that the cover plate threads lock with the housing threads. The injection hole is configured to penetrate the cover plate so that the damping fluid can enter the damping fluid receiving space. The cover plate thread is configured to adapt to the threaded connection on the housing opening; and The shaft seal groove is configured to form a sealing connection with the damping shaft near the connection end of the damping shaft.

7. The damper system as claimed in claim 6, characterized in that, Also includes: The injection plug is configured to seal the injection hole; The cover plate sealing ring is configured to be received within the housing sealing groove to seal the gap between the cover plate and the housing opening; as well as The shaft seal is configured to be received within a shaft seal groove to seal the gap between the cover plate and the damping shaft.

8. The damper system as claimed in claim 7, characterized in that, The first gap includes the radial gap of the fixed wing; The second clearance includes the radial clearance of the moving wing and the axial clearance of the moving wing; After the liquid injection and sealing are completed, a space filled with damping fluid is formed between the housing, the damping shaft, and the cover plate. There are radial clearances and axial clearances between the movable wing of the shaft and the housing and the cover plate; a radial clearance between the fixed wing and the limiting wing of the damping shaft is formed between the fixed wing and the limiting wing of the housing.

9. The damper system as claimed in claim 7, characterized in that, When the damping shaft needs to rotate, the damping fluid is pushed to rotate by the movable wing of the shaft. The damping fluid is incompressible and flows in the opposite direction through the first gap and / or the second gap to the rear of the housing limiting wing and the movable wing of the shaft in the opposite direction of rotation.

10. The damper system as claimed in claim 7, characterized in that, The cross-sectional area of ​​the flow passage formed by the first gap and / or the second gap is related to the resistance required during relative rotation; The viscosity of the injected damping fluid is related to the resistance required during relative rotation; The axial clearance of the moving blade is adjusted by adjusting the locking holes on the cover plate to regulate the resistance.

Images