CN211550537U

CN211550537U - Sealing structure, independent wheel set device and bogie

Info

Publication number: CN211550537U
Application number: CN201921319965.1U
Authority: CN
Inventors: 戚援; 宁烨; 侯传伦; 吴志强; 杨辉; 郑志立
Original assignee: CRRC Qishuyan Institute Co Ltd; CRRC Changzhou Tech Mark Industrial Co Ltd
Current assignee: CRRC Qishuyan Institute Co Ltd; CRRC Changzhou Tech Mark Industrial Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-09-22
Anticipated expiration: 2029-08-14

Abstract

The utility model relates to a rail transit vehicle part technical field aims at providing a seal structure, independent wheel set device and bogie. The utility model provides a seal structure is used for sealing up the clearance between first part and the second part, and first part rotationally cooperates with the second part. Which includes a first sealing mechanism. The first sealing mechanism comprises a static sealing ring and a dynamic sealing ring which are in mutual rotating fit, the dynamic sealing ring is used for being connected with the first component, and the static sealing ring is used for being connected with the second component. Form between dynamic seal ring and the quiet sealing ring along the first clearance of radial extension and along the second clearance of axial extension, first clearance and second clearance intercommunication each other, through set up first seal assembly in first clearance, set up second seal assembly in the second clearance, improve sealed effect, effectively obstruct impurity such as steam, dust, grit in the service environment to help improving the life of independent wheel set device.

Description

Sealing structure, independent wheel set device and bogie

Technical Field

The utility model relates to a rail transit vehicle part technical field particularly, relates to a seal structure, independent wheel set device and bogie.

Background

With the rapid development of urban rail transit subways, light rails and the like, the requirements of rail transit vehicles are higher and higher. For example, the independent wheel pair technology is widely used. The wheels and the axles of the traditional wheel set are pressed in an interference manner, the wheels are driven to rotate by the axles, and the sealing technology is not involved between the axles; the wheels of the independent wheel pair are connected with the axle through roller bearings, the outer rings of the bearings are arranged in the inner holes of the wheels, the inner rings of the bearings are arranged on the axle, and the wheel pair relates to the sealing of the wheel bearings.

Track transportation vehicles's among the prior art sealing mechanism structure is complicated, and then causes seal assembly's the higher problem of cost, and sealed effect is poor moreover, can't realize effectively keeping apart impurity such as steam, dust, grit in the air.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a seal structure to improve the above-mentioned problem that exists among the prior art.

The utility model aims at providing an independent wheel set device still includes and provides an above-mentioned seal structure is drawn together to this independent wheel set device.

The utility model aims at also providing a bogie, this bogie includes foretell independent wheel set device.

The embodiment of the utility model is realized like this:

a sealing structure is used for sealing a gap between a first component and a second component, the first component is rotatably matched with the second component and comprises a first sealing mechanism, and the first sealing mechanism comprises a static sealing ring and a dynamic sealing ring which are rotatably matched; the static sealing ring is used for being connected with the second component, and the dynamic sealing ring is used for being connected with the first component;

a first gap extending along the axial direction and a second gap extending along the radial direction and communicated with the first gap are formed between the static sealing ring and the dynamic sealing ring; a first sealing assembly is arranged in the first gap; a second seal assembly is disposed within the second gap.

In an embodiment of the present invention:

the first sealing assembly comprises a first sealing overlapping ring arranged between the outer peripheral surface of the static sealing ring and the inner peripheral surface of the dynamic sealing ring, and the two end sides of the first sealing overlapping ring in the radial direction are respectively in abutting fit with the static sealing ring and the dynamic sealing ring.

In an embodiment of the present invention:

the outer peripheral surface of the static sealing ring is provided with a first sealing groove, and two ends of the first sealing stacking ring are respectively abutted and matched with the bottom surface of the first sealing groove and the inner peripheral surface of the movable sealing ring.

In an embodiment of the present invention:

one end of the inner circumferential surface of the movable sealing ring, which is close to the static sealing ring, is provided with a first conical surface, and the first conical surface is used for extruding the first sealing laminated ring so as to radially compress the first sealing laminated ring.

In an embodiment of the present invention:

the outer peripheral surface of the static sealing ring is provided with a sealing part, the sealing part extends along the radial direction, and a second gap is formed between the sealing part and the dynamic sealing ring; the second sealing assembly comprises a sealing bulge arranged on the sealing part and a second sealing groove arranged on the dynamic sealing ring; the sealing bulge and the second sealing groove extend along the axial direction, and the sealing bulge and the second sealing groove are in clearance fit to form a sealing labyrinth structure.

In an embodiment of the present invention:

the second sealing assembly further comprises a first V-shaped sealing ring, and the first V-shaped sealing ring is arranged between the top surface of the sealing protrusion and the bottom surface of the second sealing groove.

In an embodiment of the present invention:

the second sealing assembly further comprises a second V-shaped sealing ring, and the second V-shaped sealing ring is arranged between the outer end face of the movable sealing ring and the sealing part.

In an embodiment of the present invention:

the second sealing groove is provided with a side wall matched with the peripheral surface of the sealing bulge; the second sealing assembly also comprises a third sealing groove arranged on the peripheral surface of the sealing bulge and a second sealing stack ring arranged in the third sealing groove; the radial two ends of the second sealing laminated ring are respectively and tightly matched with the bottom surface and the side wall of the third sealing groove in an abutting mode.

In an embodiment of the present invention:

one end, far away from the bottom surface of the second sealing groove, of the side wall is provided with a second conical surface, and the second conical surface is used for abutting against the second sealing stack ring so as to enable the second sealing stack ring to be radially compressed.

In an embodiment of the present invention:

two second seal grooves are arranged at intervals along the radial direction of the movable seal ring, two seal protrusions are arranged along the radial direction of the static seal ring, and the two second seal grooves and the two seal protrusions are arranged in a one-to-one corresponding matching mode.

In an embodiment of the present invention:

the distance between the bottom surface of the second sealing groove positioned on the outer side of the movable sealing ring and the inner end surface of the movable sealing ring is larger than the distance between the bottom surface of the second sealing groove positioned on the radial inner side of the movable sealing ring and the inner end surface.

In an embodiment of the present invention:

the movable sealing ring is also provided with a boss which is used for clamping and matching with the first component; the first sealing mechanism further comprises a first sealing ring arranged at the junction of the boss and the end face of the movable sealing ring.

In an embodiment of the present invention:

and one axial end of the static sealing ring is provided with a positioning groove, and the positioning groove is used for being matched with the positioning step of the second part so as to axially position the static sealing ring.

In an embodiment of the present invention:

and a second sealing ring is arranged at the junction of the positioning groove and the end face of the static sealing ring.

In an embodiment of the present invention:

the sealing structure also comprises a second sealing mechanism; the second sealing mechanism is arranged opposite to the first sealing mechanism, and the first sealing mechanism and the second sealing mechanism are respectively used for sealing two axial sides of the first component.

In an embodiment of the present invention:

the second sealing mechanism comprises an outer end cover fixedly connected to the first component and an axial locking cover arranged in the outer end cover; and a third sealing overlapping ring is arranged between the outer peripheral surface of the axial locking cover and the inner peripheral surface of the outer end cover.

An independent wheel set device comprises an axle, wheels and any one of the sealing structures; the wheel is sleeved on the axle, and the axle is rotatably connected with the wheel; the first sealing mechanism is arranged on one side of the axial direction of the wheel, a movable sealing ring of the first sealing mechanism is connected to the wheel, and a static sealing ring of the first sealing mechanism is connected to the axle.

A bogie comprises the independent wheel pair device.

The utility model discloses beneficial effect includes:

an embodiment of the utility model provides a seal structure for seal the clearance between first part and the second part, first part rotationally cooperates with the second part. Which includes a first sealing mechanism. The first sealing mechanism comprises a static sealing ring and a dynamic sealing ring which are in mutual rotating fit, the dynamic sealing ring is used for being connected with the first component, and the static sealing ring is used for being connected with the second component. Form between dynamic seal ring and the static seal ring along the first clearance of radial extension and along the second clearance of axial extension, first clearance and second clearance intercommunication each other, through set up first seal assembly in first clearance, set up second seal assembly in the second clearance, improve sealed effect, carry out effective separation to the impurity in the service environment (for example steam, dust, grit etc.), satisfy the operation requirement to help improving life.

The embodiment of the utility model provides an independent wheel set device, it includes foretell seal structure, consequently also has sealed effectual, can satisfy user demand, long service life's beneficial effect.

The embodiment of the utility model provides a bogie, including foretell independent wheel set device, consequently also have sealed effectual, can satisfy user demand, long service life's beneficial effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an overall structure of an independent wheel set device provided in embodiment 1 of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at II;

fig. 3 is a schematic structural view of a static seal ring in the independent wheel pair device provided in embodiment 1 of the present invention;

fig. 4 is a schematic structural view of a dynamic seal ring in the independent wheel pair device provided in embodiment 1 of the present invention;

FIG. 5 is an enlarged view of a portion of the structure at V in FIG. 1;

fig. 6 is a schematic partial structural view of an independent wheel set device provided in embodiment 2 of the present invention;

fig. 7 is a schematic partial structural view of an independent wheel set device provided in embodiment 3 of the present invention.

Icon: 010-independent wheel set means; 110-axle; 111-positioning step; 112-a first end face; 113-a second end face; 120-a wheel; 131-a first bearing; 132-a second bearing; 200-a first sealing mechanism; 210-a static sealing ring; 211-a first ring body; 212-a seal; 213-sealing protrusion; 214-first seal groove; 215-positioning groove; 216-a first mounting notch; 217-third seal groove; 220-dynamic sealing ring; 221-a second ring body; 222-a first mounting boss; 223-boss; 224-a second seal groove; 225-a first taper; 226-second tapered surface; 231-a first sealing stack ring; 232-a second sealing stack ring; 233-first V-shaped sealing ring; 234-a second V-ring; 235-a first sealing ring; 236-a second seal ring; 300-a second sealing mechanism; 310-an axial locking cap; 311-fourth seal groove; 320-an outer end cap; 330-a third sealing stack ring; 340-third sealing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", and the like are used for distinguishing the description, and are not to be construed as indicating or implying relative importance.

Example 1

Fig. 1 is a schematic structural diagram of an independent wheelset device 010 provided in this embodiment, and fig. 2 is an enlarged schematic partial structural diagram at ii in fig. 1. Referring to fig. 1 and 2 in combination, the present embodiment provides a sealing structure for sealing a gap between a first member and a second member, the first member and the second member being rotatably engaged. The present embodiment describes the sealing structure and the independent wheel set device 010 formed by the sealing structure as an example of the sealing structure used for an independent wheel set. The first component is thus the wheel 120 of the individual wheelset 010 and the second component is the axle 110 of the individual wheelset 010, the sealing structure being used to seal the gap between the wheel 120 and the axle 110 in order to provide a working environment for the bearing that meets the requirements of use.

The independent wheel set device 010 provided in this embodiment is further described as follows:

and an independent wheel-pair device 010 comprising an axle 110, a wheel 120 and a first sealing mechanism 200. The wheel 120 is rotatably sleeved on the axle 110 through a bearing, and the first sealing mechanism 200 is arranged inside the wheel 120 to seal a gap between the wheel 120 and the axle 110 so as to seal the bearing. The first sealing mechanism comprises a static sealing ring 210 connected to the axle 110 and a dynamic sealing ring 220 connected to the wheel 120, wherein the dynamic sealing ring 220 can be driven by the wheel 120 to rotate so as to be in rotating fit with the static sealing ring 210. Move and form the first clearance along radial extension and follow axial extension's second clearance between sealing ring 220 and the quiet sealing ring 210, first clearance and second clearance intercommunication each other, through set up first seal assembly in first clearance, set up second seal assembly in the second clearance, improve sealed effect, effectively obstruct impurity such as steam, dust, grit in the service environment, satisfy the operation requirement of bearing to help improving independent wheelset device 010's life.

Referring to fig. 1, in the embodiment, the independent wheel-pair device 010 includes an axle 110 and a wheel 120, and a bearing is disposed between the axle 110 and the wheel 120, so that the wheel 120 is rotatably sleeved outside the axle 110, specifically, bearings are respectively disposed on inner and outer sides of the wheel 120, the two bearings are respectively a first bearing 131 and a second bearing 132, the first bearing 131 is located between the wheel 120 and the axle 110 inside the wheel 120, and the second bearing 132 is located between the wheel 120 and the axle 110 outside the wheel 120. In order to seal the bearing and prevent impurities (such as moisture, dust, and gravel) in the air from entering the bearing during use, a first sealing mechanism 200 is disposed at one end of the first bearing 131 far away from the second bearing 132, and a second sealing mechanism 300 is disposed at one end of the second bearing 132 far away from the first bearing 131. The first sealing mechanism 200 and the second sealing mechanism 300 are arranged oppositely, so that the two axial sides of the wheel 120 are respectively sealed through the first sealing mechanism 200 and the second sealing mechanism 300, and impurities are prevented from entering a gap between the wheel 120 and the axle 110 and further influencing the work of the independent wheel set device 010.

Fig. 3 is a schematic structural view of a static seal ring 210 in the independent wheelset device 010 provided in this embodiment, and fig. 4 is a schematic structural view of a dynamic seal ring 220 in the independent wheelset device 010 provided in this embodiment. Referring to fig. 2 to 4, in the present embodiment, the first sealing mechanism 200 includes a static sealing ring 210 and a dynamic sealing ring 220 connected to the wheel 120, the static sealing ring 210 is rotatably engaged with the dynamic sealing ring 220, and a first gap extending along an axial direction and a second gap extending along a radial direction are formed between the static sealing ring 210 and the dynamic sealing ring 220, and the first gap and the second gap are communicated with each other. Be provided with first seal assembly in the first clearance, be provided with second seal assembly in the second seal clearance, through first seal assembly and second seal assembly's combined action, seal the bearing, guarantee that sealed effect satisfies the operation requirement of independent wheel pair.

Specifically, the axle 110 is provided with a positioning step 111, and the positioning step 111 is stepped to form a first end surface 112 and a second end surface 113 that are gradually close to the first bearing 131 in the axial direction. The static seal ring 210 includes a first ring body 211 which is substantially circular cylindrical, the inner and outer circumferential surfaces of the first ring body 211 are the inner and outer circumferential surfaces of the static seal ring 210, the two end surfaces of the first ring body 211 in the axial direction are the two end surfaces of the static seal ring 210 in the axial direction, one end surface of the first ring body 211 is provided with a positioning groove 215, the end surface of the first ring body 211 in the side is abutted to the first end surface 112 of the positioning step 111, the bottom surface of the positioning groove 215 is abutted to the second end surface 113 of the positioning step 111, thereby realizing the axial positioning of the static seal ring 210, and when the static seal ring is used, the end surface of the first ring body 211 which is far away from the positioning groove 215 is abutted to the inner ring of the first bearing 131, so that the static seal ring 210 is pressed between the axle 110 and the first bearing 131, thereby preventing the static seal ring 210 from axial play and. Meanwhile, the side surface of the positioning groove 215 abuts against the circumferential surface connected between the first end surface 112 and the second end surface 113, thereby ensuring the radial positioning reliability of the static seal ring 210. Further, a second seal 236 is disposed between the static seal ring 210 and the axle 110, so as to seal between the static seal ring 210 and the axle 110. Specifically, a first installation notch 216 is formed at a junction between the end surface of the first ring body 211 and the positioning groove 215, and the second sealing ring 236 is disposed in the first installation notch 216. Preferably, the second seal 236 is an O-ring seal.

The dynamic seal ring 220 includes a second ring body 221 having a substantially circular-ring column shape, the inner and outer circumferential surfaces of the second ring body 221 are the inner and outer circumferential surfaces of the dynamic seal ring 220, and two end surfaces of the second ring body 221 in the axial direction are the two end surfaces of the dynamic seal ring 220 in the axial direction. The dynamic seal ring 220 further includes a first mounting protrusion 222 provided on the outer circumferential surface of the second ring body 221, the first mounting protrusion 222 being formed to protrude radially outward from the outer circumferential surface of the second ring body 221. Further, a first seal ring 235 is disposed between the dynamic seal ring 220 and the wheel 120, so as to seal between the dynamic seal ring 220 and the wheel 120. Specifically, the dynamic seal ring 220 further includes a boss 223 disposed on an end surface of the second ring body 221 near one end of the wheel 120, the boss 223 is formed by protruding the inner end surface of the second ring body 221 outward in the axial direction, the boss 223 is inserted into the inner hole of the wheel 120, and the outer peripheral surface of the boss 223 is matched with the hole surface of the inner hole of the wheel 120, so that the boss 223 is clamped and matched with the wheel 120. The first sealing ring 235 is disposed at a junction between an outer peripheral surface of the boss 223 and an end surface of the first mounting protrusion 222, and a second mounting notch is formed at a junction between an inner end surface and an inner hole of the wheel 120, in which the first sealing ring 235 is accommodated. Preferably, the first seal 235 is an O-ring seal.

With reference to fig. 2 to fig. 4, in the present embodiment, the first gap includes a gap between an outer circumferential surface of the first ring body 211 and an inner circumferential surface of the second ring body 221, the first sealing assembly includes two first sealing overlapping rings 231 disposed between the outer circumferential surface of the first ring body 211 and the inner circumferential surface of the second ring body 221, and two ends of the first sealing overlapping rings 231 in the radial direction respectively abut against and cooperate with the first ring body 211 and the second ring body 221 to achieve a sealing function. Specifically, in order to ensure the sealing effect of the first sealing assembly, two first sealing grooves 214 are formed in the outer circumferential surface of the first ring body 211, two first sealing overlapping rings 231 are respectively disposed in the two first sealing grooves 214, and two ends of the first sealing overlapping rings 231 in the radial direction respectively abut against and are tightly matched with the bottom surface of the first sealing groove 214 and the inner circumferential surface of the second ring body 221.

It should be noted that, in this embodiment, two first seal grooves 214 are formed on the outer peripheral surface of the first ring body 211, and two first seal rings 231 are respectively disposed in the two first seal grooves 214, it can be understood that, in other specific embodiments, the number of the first seal grooves 214 and the number of the first seal rings 231 may also be specifically set according to the severity of the external environment, for example, the number of the first seal grooves 214 and the number of the first seal rings 231 are set to be 1 or 3, and the sealing requirement may be satisfied.

Further, the first sealing ring stack 231 includes a plurality of elastic steel sheets, an outer diameter of the first sealing ring stack 231 in a free state is slightly larger than a radial dimension of an inner circumferential surface of the second ring body 221, and after the movable sealing ring 220 is sleeved on the stationary sealing ring 210, the first sealing ring stack 231 is radially compressed, so that the first sealing groove 214 and the movable sealing ring 220 are tightly sealed. In order to ensure that the first seal stack ring 231 can be smoothly pressed in the installation process of the movable seal ring 220 and the static seal ring 210, so as to realize installation, furthermore, a first conical surface 225 is arranged at one end, close to the static seal ring 210, of the inner circumferential surface of the second ring body 221, the radial dimension of the first conical surface 225 is gradually reduced along the direction gradually approaching the first bearing 131, the first seal stack ring 231 is pressed with the first conical surface 225 in the installation process, and the first seal stack ring 231 is pressed by the first conical surface 225 until the radial dimension is gradually reduced until the first seal stack ring 231 is abutted against the inner circumferential surface of the second ring body 221 in the process that the static seal ring 210 and the movable seal ring 220 are relatively approached along the axial direction. Preferably, the first tapered surface 225 and the inner circumferential surface of the second ring 221 are smoothly transitioned through an arc surface.

The stationary seal ring 210 further includes a seal portion 212 provided on the outer peripheral surface of the first ring body 211. The sealing portion 212 extends radially outward, and a second gap is formed between an end surface of the sealing portion 212 close to one end of the first bearing 131 and an end surface of the second ring body 221 away from one end of the first bearing 131. The end surface of the sealing portion 212 near one end of the first bearing 131 is provided with a sealing protrusion 213, and the sealing protrusion 213 extends in the axial direction toward the first bearing 131. The end surface of the second ring body 221 of the dynamic seal ring 220, which is far away from the first bearing 131, is provided with a second seal groove 224. The second seal assembly includes a seal protrusion 213 and a second seal groove 224, the seal protrusion 213 is inserted into the second seal groove 224, and a second ring body 221 located at the radial inner side of the second seal groove 224 is inserted into a gap between the seal protrusion 213 and the outer circumferential surface of the first ring body 211, and a seal labyrinth structure is formed by clearance fit, so that the second gap extends in a serpentine shape to the radial outer side.

In order to improve the sealing effect of the second seal assembly, the seal labyrinth structure is further sealed, and further, the second seal assembly further includes a first V-shaped seal ring 233 disposed between the seal protrusion 213 and the second seal groove 224, and both sides of the first V-shaped seal ring 233 in the axial direction are respectively abutted against the top surface of the seal protrusion 213 and the bottom surface of the second seal groove 224.

Further, the second seal assembly further includes a second V-shaped seal ring 234 disposed between the seal portion 212 and the second ring body 221, and both sides of the second V-shaped seal ring 234 in the axial direction are respectively abutted against the seal portion 212 and the second ring body 221.

Fig. 5 is an enlarged view of a portion of the structure at v in fig. 1. Referring to fig. 1 and 5 in combination, in the present embodiment, the second sealing mechanism 300 includes an outer end cap 320 connected to the outer side of the axle 110 and an axial locking cap 310 disposed between the outer end cap 320 and the axial end of the axle 110. Specifically, the outer end cap 320 has a substantially cylindrical shape having an inner cavity, one axial end of the inner cavity is open, and the axial locking cap 310 enters the inner cavity of the outer end cap 320 through the opening. In order to ensure the sealing of the second bearing 132, two fourth sealing grooves 311 are formed on the outer circumferential surface of the axial locking cover 310, two third sealing stacked rings 330 are respectively disposed in the two fourth sealing grooves 311, and two radial sides of the third sealing stacked rings 330 are respectively abutted against the bottom surface of the fourth sealing groove 311 and the inner circumferential surface of the outer end cover 320.

In order to facilitate the installation, the third sealing ring stack 330 includes a plurality of elastic steel sheets, and further, a third conical surface is disposed at one end of the inner end surface of the outer end cap 320 close to the opening, and a radial dimension of the third conical surface is gradually reduced along an axially inward direction, during the installation of the outer end cap 320, the third conical surface presses the third sealing ring stack 330, so that the third sealing ring stack 330 is radially compressed, thereby achieving a tight sealing between the outer end cap 320 and the axial locking cap 310.

Further, in order to ensure the seal between the outer end cap 320 and the wheel 120, the second sealing mechanism 300 further includes a third sealing ring 340 disposed between the outer end cap 320 and the wheel 120. Specifically, the end face of the outer end cap 320, which is provided with the opening, is provided with a sealing boss 223 extending in the axial direction, the sealing boss 223 extends into the inner hole of the wheel 120, the third sealing element is arranged at the junction of the sealing boss 223 and the second mounting protrusion, meanwhile, the junction of the outer end face of the wheel 120 and the inner hole is provided with a third mounting notch, and the third sealing ring 340 is accommodated in the third mounting notch. Preferably, the third sealing ring 340 is an O-ring.

In the independent wheelset 010 of the embodiment of the present invention, during installation, the second V-shaped sealing ring 234 is installed in the gap between the sealing protrusion 213 and the first ring body 211, then the first sealing ring stack 231 is installed in the first sealing groove 214, and then the second sealing ring 236 is installed at the first installation gap 216; meanwhile, the first V-shaped seal ring 233 is installed in the second seal groove 224; the first seal mechanism 200 is then assembled by mounting the dynamic seal ring 220 onto the static seal ring 210, during which the first tapered surface 225 presses against the first seal stack 231, causing it to compress radially. Then, the first sealing mechanism 200 is sleeved on the axle 110 until the positioning groove 215 abuts against and is positioned on the positioning step 111, and then the first bearing 131 is mounted on the axle 110, so as to ensure the fixation of the static sealing ring 210. After completion, the wheel 120 and the second bearing 132 are mounted on the axle 110, and the dynamic seal ring 220 is fixedly coupled to the wheel 120 by the coupling bolt. And finally, the second sealing mechanism 300 is installed.

In conclusion, the independent wheelset device 010 that this embodiment provided, be provided with first sealing mechanism 200 in wheel 120 inboard, first sealing mechanism 200 includes rotary fit's movable sealing ring 220 and static sealing ring 210, and set up axial seal's first seal assembly and radial seal's second seal assembly between movable sealing ring 220 and static sealing ring 210, through first seal assembly and second seal assembly's combined action, it has good sealed effect to have guaranteed independent wheelset device 010, can effectively prolong independent wheelset device 010's life, and simultaneously, first sealing mechanism 200 simple to operate, moreover, the steam generator is simple in structure, help reducing production use cost. Further, the second sealing mechanism 300 is arranged on the outer side of the wheel 120, so that the overall sealing effect of the independent wheelset 010 is ensured.

Embodiments of the present invention further provide a bogie (not shown) including the above-mentioned independent wheel set device 010. Because this bogie includes foretell independent wheel set device 010, consequently also has sealed effectual, long service life, simple structure, simple to operate's beneficial effect.

Example 2

The present embodiment also provides a sealing mechanism, and the present embodiment is a further improvement on the technical solution of embodiment 1, and the technical solution described in embodiment 1 is also applicable to the present embodiment, and the technical solution described in embodiment 1 is not described repeatedly.

Fig. 6 is a partial schematic structural diagram of the independent wheel-pair device 010 provided in this embodiment. Referring to fig. 6, the present embodiment is different from embodiment 1 in that the second seal assembly further includes a second seal stack 232 disposed between the seal protrusion 213 and the second seal groove 224. Specifically, the second sealing groove 224 has a sidewall matched with the outer peripheral surface of the sealing protrusion 213, a third sealing groove 217 is formed on the outer peripheral surface of the sealing protrusion 213, a second sealing overlapping ring 232 is disposed in the third sealing groove 217, and two radial sides of the second sealing overlapping ring 232 are respectively abutted against and matched with the bottom surface of the third sealing groove 217 and the sidewall of the second sealing groove 224.

Further, the second seal stack 232 comprises a plurality of resilient steel sheets. The end of the sidewall of the second sealing groove 224 away from the first bearing 131 is provided with a second tapered surface 226, the radial dimension of the second tapered surface 226 gradually decreases in a direction gradually approaching the first bearing 131, and the second sealing stack 232 is radially compressed by the pressing of the second tapered surface 226 on the second sealing stack 232 during the sliding process of the second sealing stack 232 relative to the second tapered surface 226.

Example 3

The present embodiment also provides a sealing structure, and the present embodiment is a further improvement on the technical solution of embodiment 2, and the technical solution described in embodiment 2 is also applicable to the present embodiment, and the technical solution described in embodiment 2 is not described repeatedly.

Fig. 7 is a partial structural schematic view of the sealing structure provided in this embodiment. Referring to fig. 7, in particular, the present embodiment is different from embodiment 2 in that two second seal grooves 224 are disposed along the radial direction of the dynamic seal ring 220, and two seal protrusions 213 disposed on the seal portion 212 and respectively corresponding to the two second seal grooves 224 are disposed in a one-to-one matching manner, so that an E-shaped labyrinth structure is formed between the second ring body 221 and the seal portion 212. The bottom of each of the two second seal grooves 224 is provided with a first V-shaped seal ring 233, and the bottom of the gap between two adjacent seal protrusions 213 and the bottom of the gap between the radially inner seal protrusion 213 and the outer peripheral surface of the first ring body 211 are respectively provided with a second V-shaped seal groove. While a second seal stack 232 is disposed between the radially inner pair of seal lands 213 and the second seal groove 224.

Further, in order to ensure that the second seal stacked ring 232 can be disposed between the pair of seal protrusions 213 and the second seal groove 224 on the radially inner side, the two second seal grooves 224 are disposed alternately, that is, the distance between the bottom surface of the second seal groove 224 on the radially outer side of the second ring body 221 and the first bearing 131 is greater than the distance between the bottom surface of the second seal groove 224 on the radially inner side of the second ring body 221 and the first bearing 131, and the distance between the end surface of the second ring body 221 on the side where the second seal groove 224 is disposed and the first bearing 131 is gradually reduced in the radially inward direction.

It should be noted that the independent wheelset 010 provided in this embodiment is further improved on the basis of embodiment 2, and it can be understood that, in other embodiments, the number of the second seal grooves 224 and the second seal protrusions 213 can also be improved on the basis of embodiment 1 according to requirements, and meanwhile, since there is no need to provide the second seal stack ring 232 between the second seal grooves 224 and the second seal protrusions 213, there is no need to arrange the two second seal grooves 224 in a staggered manner to reserve an arrangement space of the second seal stack ring 232.

The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A seal structure for sealing a gap between a first member and a second member, the first member rotatably engaged with the second member, comprising:

the first sealing mechanism comprises a static sealing ring and a dynamic sealing ring which are in running fit; the static sealing ring is used for being connected with the second component; the dynamic sealing ring is used for being connected with the first component; a first gap extending along the axial direction and a second gap extending along the radial direction and communicated with the first gap are formed between the static sealing ring and the dynamic sealing ring; a first sealing assembly is arranged in the first gap; a second sealing assembly is arranged in the second gap;

the outer peripheral surface of the static sealing ring is provided with a sealing part, the sealing part extends along the radial direction, and a second gap is formed between the sealing part and the dynamic sealing ring; the second seal assembly comprises a seal projection disposed on the seal portion and a second seal groove disposed on the dynamic seal ring; the sealing bulge and the second sealing groove extend along the axial direction, and the sealing bulge and the second sealing groove are in clearance fit to form a sealing labyrinth structure;

the second sealing assembly further comprises a second V-shaped sealing ring, and the second V-shaped sealing ring is arranged between the outer end face of the movable sealing ring and the sealing portion.

2. The seal structure of claim 1, wherein:

the first sealing assembly comprises a first sealing overlapping ring arranged between the outer peripheral surface of the static sealing ring and the inner peripheral surface of the dynamic sealing ring, and two sides of the first sealing overlapping ring in the radial direction are respectively in abutting fit with the static sealing ring and the dynamic sealing ring.

3. The seal structure of claim 2, wherein:

the outer peripheral surface of the static sealing ring is provided with a first sealing groove, and two sides of the first sealing stacking ring are respectively abutted and tightly matched with the bottom surface of the first sealing groove and the inner peripheral surface of the movable sealing ring.

4. The seal structure of claim 3, wherein:

one end, close to the static sealing ring, of the inner circumferential surface of the movable sealing ring is provided with a first conical surface, and the first conical surface is used for extruding the first sealing stacked ring so as to enable the first sealing stacked ring to be radially compressed.

5. The seal structure of claim 1, wherein:

6. The seal structure of claim 1, wherein:

the second sealing groove is provided with a side wall matched with the peripheral surface of the sealing bulge; the second seal assembly further comprises a third seal groove arranged on the outer peripheral surface of the seal bulge and a second seal stack ring arranged in the third seal groove; and two radial sides of the second sealing stacked ring are respectively abutted and matched with the bottom surface of the third sealing groove and the side wall.

7. The seal structure of claim 6, wherein:

one end, far away from the bottom surface of the second sealing groove, of the side wall is provided with a second conical surface, and the second conical surface is used for abutting against the second sealing overlapping ring so as to enable the second sealing overlapping ring to be radially compressed.

8. The seal structure of claim 1, 5, 6 or 7, wherein:

the edge the radial interval of moving the sealing ring is provided with two the second seal groove, follows the radial of quiet sealing ring is provided with two sealed arch, two the second seal groove with two the cooperation of sealed arch one-to-one sets up.

9. The seal structure of claim 8, wherein:

the distance between the bottom surface of the second sealing groove located on the radially outer side of the dynamic sealing ring and the inner end face of the dynamic sealing ring is larger than the distance between the bottom surface of the second sealing groove located on the radially inner side of the dynamic sealing ring and the inner end face.

10. The seal structure of claim 1, wherein:

the movable sealing ring is also provided with a boss which is used for clamping and matching with the first component; the first sealing mechanism further comprises a first sealing ring arranged at the boss.

11. The seal structure of claim 1, wherein:

12. The seal structure of claim 11, wherein:

13. The seal structure of claim 1, wherein:

the sealing structure further comprises a second sealing mechanism; the second sealing mechanism is opposite to the first sealing mechanism, and the first sealing mechanism and the second sealing mechanism are respectively used for sealing two axial sides of the first component.

14. The seal structure of claim 13, wherein:

15. An independent wheel pair device is characterized in that:

the independent wheelset assembly comprising an axle, a wheel, and a seal structure according to any one of claims 1-14; the wheel is sleeved on the axle, and the axle is rotatably connected with the wheel; the first sealing mechanism is arranged on one axial side, a movable sealing ring of the first sealing mechanism is connected to the wheel, and a static sealing ring of the first sealing mechanism is connected to the axle.

16. A bogie, characterized by:

the bogie comprises an independent wheelset assembly according to claim 15.