A sealing structure for a rotating part

Abstract

The present invention discloses a sealing structure for a rotating part, which includes an electromagnetic coil, a spring piece, a dynamic sealing disc, a sealing ring, a static sealing disc, an equipment housing and an equipment rotating shaft. A sealing structure similar to a labyrinth is provided between the equipment housing and the bearing, and the equipment rotating shaft is movably connected to the equipment housing through the bearing. An electromagnetic coil, a dynamic sealing disc I, a sealing ring I and a static sealing disc I are sleeved on the equipment rotating shaft, and a plurality of spring pieces I are arranged between the electromagnetic coil and the dynamic sealing disc I. When the equipment rotating shaft is started to rotate, and at the same time, the electromagnetic coil is energized, the dynamic sealing disc I slides on the equipment rotating shaft and approaches the electromagnetic coil under the magnetic attraction of the electromagnetic coil, the spring pieces I are compressed, and the dynamic sealing disc I is separated from the static sealing disc I. The present invention realizes the simultaneous realization of dynamic sealing and static sealing and can solve the problems of volume limitation and difficulties that are difficult to solve by other seals.

Description

Technical Field

[0001] The present invention relates to a sealing structure for a rotating part. Background Art

[0002] In the current development environment, major domestic equipment platforms have increasingly strict requirements for weight and volume. Components of rotating structures for special purposes in special environments not only have high requirements for dynamic and static sealing, but also require small volume. In the existing market environment, almost all adopt mechanical seals or oil seals. However, the mechanical seal mechanism is large in size and very bulky. Although the oil seal has a smaller volume, it cannot be lubricated in some environments, resulting in serious friction of the oil seal, short service life, and serious heating at the oil seal opening, increasing the operation risk of the equipment and being unfavorable for special requirements under special conditions. Even for many devices, there is not enough space to install an oil seal. Summary of the Invention

[0003] The purpose of the present invention is to provide a sealing structure for a rotating part to solve the problems existing in the prior art.

[0004] The technical solution adopted to achieve the purpose of the present invention is as follows: A sealing structure for a rotating part includes an electromagnetic coil, a spring plate I, a dynamic sealing disc I, a sealing ring I, a static sealing disc I, an equipment housing, and an equipment rotating shaft.

[0005] A circular through-hole for the equipment rotating shaft to pass through is provided on the equipment housing, and the equipment rotating shaft passes through the circular through-hole and extends into the equipment interior.

[0006] A plurality of layers of grooves are arranged at equal intervals along the axial direction of the circular through-hole. Each layer of grooves includes a plurality of grooves arranged at equal intervals along the circumferential direction of the circular through-hole, and the grooves in adjacent two layers are arranged in a staggered manner.

[0007] A bearing is installed in the circular through-hole, and the equipment rotating shaft is movably connected to the equipment housing through the bearing. A plurality of layers of protrusions are arranged on the outer wall of the bearing at equal intervals along the axial direction of the bearing. Each layer of protrusions includes a plurality of protrusions arranged at equal intervals along the circumferential direction of the bearing, and the protrusions in adjacent two layers are arranged in a staggered manner. The protrusions match the grooves, and the plurality of protrusions are respectively embedded in the plurality of grooves.

[0008] An electromagnetic coil, a dynamic sealing disc I, a sealing ring I, and a static sealing disc I are sleeved on the shaft section of the equipment rotating shaft located inside the equipment. The electromagnetic coil, the dynamic sealing disc I, the sealing ring I, and the static sealing disc I are arranged in sequence along the direction close to the bearing. A plurality of spring plates I are arranged between the electromagnetic coil and the dynamic sealing disc I, and the static sealing disc I is fixedly connected to the equipment rotating shaft.

[0009] When the equipment rotating shaft is in the static initial state, the dynamic sealing disc I presses the sealing ring I under the elastic force of the spring plate I, and the sealing ring I is in close contact with the static sealing disc I for sealing.

[0010] When the rotating shaft of the device starts to rotate, power is simultaneously supplied to the electromagnetic coil. The moving sealing disk I slides on the rotating shaft of the device and approaches the electromagnetic coil under the magnetic attraction of the electromagnetic coil. The spring piece I is compressed, and the moving sealing disk I disengages from the static sealing disk I. After the rotating shaft of the device stops, it returns to the initial state.

[0011] Furthermore, the sealing ring I is a rubber ring.

[0012] A sealing structure for a rotating part includes a locking card, a support frame, a spring piece II, a moving sealing disk II, a sealing ring II, a static sealing disk II, a device housing, and a rotating shaft of the device.

[0013] A circular through-hole for the rotating shaft of the device to pass through is provided on the device housing, and the rotating shaft of the device passes through the circular through-hole and extends into the device interior.

[0014] A plurality of layers of grooves are arranged at equal intervals along the axial direction of the circular through-hole. Each layer of grooves includes a plurality of grooves arranged at equal intervals along the circumferential direction of the circular through-hole, and the grooves of adjacent two layers are arranged in a staggered manner.

[0015] A bearing is installed in the circular through-hole, and the rotating shaft of the device is movably connected to the device housing through the bearing. A plurality of layers of protrusions are arranged on the outer wall of the bearing. The plurality of layers of protrusions are arranged at equal intervals along the axial direction of the bearing. Each layer of protrusions includes a plurality of protrusions arranged at equal intervals along the circumferential direction of the bearing, and the protrusions of adjacent two layers are arranged in a staggered manner. The protrusions match the grooves, and the plurality of protrusions are respectively embedded in the plurality of grooves.

[0016] Both the locking card and the support frame are in a circular ring shape. A locking card, a support frame, a moving sealing disk II, a sealing ring II, and a static sealing disk II are sleeved on the shaft section of the rotating shaft of the device located inside the device. The locking card, the support frame, the moving sealing disk II, the sealing ring II, and the static sealing disk II are arranged in sequence along the direction close to the bearing. The locking card, the support frame, and the static sealing disk II are all fixed on the rotating shaft of the device and the locking card contacts the support frame, and a plurality of spring pieces II are arranged between the support frame and the moving sealing disk II.

[0017] A spiral structure is provided on the shaft section of the rotating shaft of the device that contacts the moving sealing disk II.

[0018] When the rotating shaft of the device is in the initial static state, the moving sealing disk II presses the sealing ring II under the elastic force of the spring piece II, and the sealing ring II is in close contact with the static sealing disk II for sealing.

[0019] When the rotating shaft of the device starts to rotate, the moving sealing disk II generates relative movement with the rotating shaft of the device and approaches the support frame under the rotation of the spiral structure of the rotating shaft of the device. The spring piece II is compressed, and the moving sealing disk II disengages from the static sealing disk II. After the rotating shaft of the device stops, it returns to the initial state.

[0020] Furthermore, the sealing ring II is a rubber ring.

[0021] The technical effect of the present invention is beyond doubt. The present invention proposes a sealing design method, which adopts a separate design of dynamic sealing and static sealing in terms of structure, and a method of combining dynamic and static; the labyrinth structure forms the dynamic sealing and static sealing design structures, realizing the simultaneous realization of dynamic sealing and static sealing and solving the problems that are difficult to solve by volume limitation and other seals. Description of the Drawings

[0022] Figure 1 It is a cross-sectional view of the rotating part sealing structure described in Embodiment 1;

[0023] Figure 2 is Figure 1 a partial enlarged view of the structure shown;

[0024] Figure 3 It is a cross-sectional view of the rotating part sealing structure described in Embodiment 2;

[0025] Figure 4 is Figure 3 a partial enlarged view of the structure shown;

[0026] Figure 5 It is a partial enlarged view of the connection between the equipment housing and the bearing;

[0027] Figure 6 It is a schematic diagram of a groove provided on the circular through-hole of the equipment housing;

[0028] Figure 7 It is a schematic diagram of several protrusions provided on the bearing.

[0029] In the figure: electromagnetic coil 1, spring piece I 2, dynamic sealing disk I 3, sealing ring I 4, static sealing disk I 5, equipment housing 6, circular through-hole 601, groove 6011, equipment rotating shaft 7, spiral structure 701, locking card 8, support frame 9, spring piece II 10, dynamic sealing disk II 11, sealing ring II 12, static sealing disk II 13, bearing 16 and protrusion 1601. Detailed Embodiments

[0030] The present invention will be further described below in conjunction with embodiments, but it should not be understood that the above-mentioned subject scope of the present invention is limited to the following embodiments. Without departing from the above technical idea of the present invention, various substitutions and changes should be included in the protection scope of the present invention according to the common general knowledge and customary means in the art.

[0031] Embodiment 1:

[0032] See Figure 1, this embodiment discloses a sealing structure for a rotating part, which includes an electromagnetic coil 1, a spring piece I 2, a dynamic sealing disk I 3, a sealing ring I 4, a static sealing disk I 5, a device housing 6, and a device rotating shaft 7.

[0033] A circular through-hole 601 for the device rotating shaft 7 to pass through is provided on the device housing 6, and the device rotating shaft 7 passes through the circular through-hole 601 and extends into the device interior.

[0034] See Figure 6 , a plurality of layers of grooves are arranged at equal intervals along the axial direction of the circular through-hole 601. Each layer of grooves includes a plurality of grooves 6011 arranged at equal intervals along the circumferential direction of the circular through-hole 601, and the plurality of grooves 6011 in adjacent two layers are arranged in a staggered manner.

[0035] A bearing 16 is installed in the circular through-hole 601, and the device rotating shaft 7 is movably connected to the device housing 6 through the bearing 16. See Figure 7 , a plurality of layers of protrusions are arranged on the outer wall of the bearing 16. The plurality of layers of protrusions are arranged at equal intervals along the axial direction of the bearing 16. Each layer of protrusions includes a plurality of protrusions 1601 arranged at equal intervals along the circumferential direction of the bearing 16. The plurality of protrusions 1601 in adjacent two layers are arranged in a staggered manner. The protrusions (1601) are matched with the grooves (6011). See Figure 5 , a plurality of protrusions 1601 are respectively embedded into a plurality of grooves 6011 to form a structure similar to a labyrinth.

[0036] An electromagnetic coil 1, a dynamic sealing disk I 3, a sealing ring I 4, and a static sealing disk I 5 are sleeved on the shaft section of the device rotating shaft 7 located inside the device. The electromagnetic coil 1, the dynamic sealing disk I 3, the sealing ring I 4, and the static sealing disk I 5 are arranged in sequence along the direction close to the bearing 16. A plurality of spring pieces I 2 are provided between the electromagnetic coil 1 and the dynamic sealing disk I 3. The static sealing disk I 5 is fixedly connected to the device rotating shaft 7. The sealing ring I 4 is a rubber ring.

[0037] See Figure 2 , when the device rotating shaft 7 is in the initial static state, the dynamic sealing disk I 3 squeezes the sealing ring I 4 under the elastic force of the spring piece I 2, and the sealing ring I 4 is in close contact with the static sealing disk I 5 for sealing.

[0038] When starting the rotation of the device rotating shaft 7, the electromagnetic coil 1 is simultaneously energized. The dynamic sealing disk I 3 slides on the device rotating shaft 7 and approaches the electromagnetic coil 1 under the magnetic attraction of the electromagnetic coil 1. The spring piece I 2 is compressed, and the dynamic sealing disk I 3 is separated from the static sealing disk I 5, realizing no friction effect after the rotating part moves. After the device rotating shaft 7 stops, the electromagnetic coil 1 is powered off and returns to the initial state.

[0039] Embodiment 2:

[0040] See Figure 3, this embodiment discloses a sealing structure for a rotating part, including a locking card 8, a support frame 9, a spring piece II 10, a dynamic sealing disk II 11, a sealing ring II 12, a static sealing disk II 13, an equipment housing 6 and an equipment rotating shaft 7.

[0041] A circular through-hole 601 for the equipment rotating shaft 7 to pass through is provided on the equipment housing 6, and the equipment rotating shaft 7 passes through the circular through-hole 601 and extends into the equipment interior.

[0042] See Figure 6 , a plurality of layers of grooves are arranged at equal intervals along the axial direction of the circular through-hole 601. Each layer of grooves includes a plurality of grooves 6011 arranged at equal intervals along the circumferential direction of the circular through-hole 601, and the plurality of grooves 6011 in adjacent two layers are arranged in a staggered manner.

[0043] A bearing 16 is installed in the circular through-hole 601, and the equipment rotating shaft 7 is movably connected to the equipment housing 6 through the bearing 16. See Figure 7 , a plurality of layers of protrusions are arranged on the outer wall of the bearing 16. The plurality of layers of protrusions are arranged at equal intervals along the axial direction of the bearing 16. Each layer of protrusions includes a plurality of protrusions 1601 arranged at equal intervals along the circumferential direction of the bearing 16. The plurality of protrusions 1601 in adjacent two layers are arranged in a staggered manner. The protrusions (1601) match the grooves (6011). See Figure 5 , a plurality of protrusions 1601 are respectively embedded into a plurality of grooves 6011 to form a structure similar to a labyrinth.

[0044] Both the locking card 8 and the support frame 9 are in a circular ring shape. A locking card 8, a support frame 9, a dynamic sealing disk II 11, a sealing ring II 12 and a static sealing disk II 13 are sleeved on the shaft section of the equipment rotating shaft 7 located inside the equipment. The locking card 8, the support frame 9, the dynamic sealing disk II 11, the sealing ring II 12 and the static sealing disk II 13 are arranged in sequence along the direction close to the bearing 16. The locking card 8, the support frame 9 and the static sealing disk II 13 are all fixed on the equipment rotating shaft 7 and the locking card 8 contacts the support frame 9. A plurality of spring pieces II 10 are arranged between the support frame 9 and the dynamic sealing disk II 11. The sealing ring II 12 is a rubber ring. The locking card 8 serves as a limiting device and can adjust the pressure of the sealing ring II 12 and the dynamic sealing disk II 11 to achieve static sealing of different IP grades.

[0045] A spiral structure 701 is provided on the shaft section of the equipment rotating shaft 7 in contact with the dynamic sealing disk II 11.

[0046] When the equipment rotating shaft 7 is in the initial static state, the dynamic sealing disk II 11 squeezes the sealing ring II 12 under the elastic force of the spring piece II 10, and the sealing ring II 12 is in close contact with the static sealing disk II 13 for sealing.

[0047] See Figure 4, when starting the rotation of the device rotating shaft 7, the dynamic seal disc II 11 generates relative movement with the device rotating shaft 7 under the rotational action of the spiral structure 701 of the device rotating shaft 7 and approaches the support frame 9, the spring piece II 10 is compressed, the dynamic seal disc II 11 is disengaged from the static seal disc II 13, and after the device rotating shaft 7 stops, the device rotating shaft 7 is appropriately rotated back to restore the initial state.

Claims

1. A sealing structure for a rotating part, characterized in that: it includes an electromagnetic coil (1), a first spring piece (2), a first dynamic sealing disc (3), a first sealing ring (4), a first static sealing disc (5), an equipment housing (6) and an equipment rotating shaft (7); a circular through hole (601) for the equipment rotating shaft (7) to pass through is provided on the equipment housing (6), and the equipment rotating shaft (7) passes through the circular through hole (601) and extends into the equipment interior; a plurality of layers of grooves are arranged at equal intervals along the axial direction of the circular through hole (601), each layer of grooves includes a plurality of grooves (6011) arranged at equal intervals along the circumferential direction of the circular through hole (601), and the plurality of grooves (6011) in adjacent two layers are arranged in a staggered manner; a bearing (16) is installed in the circular through hole (601), the equipment rotating shaft (7) is movably connected to the equipment housing (6) through the bearing (16), a plurality of layers of protrusions are arranged on the outer wall of the bearing (16), the plurality of layers of protrusions are arranged at equal intervals along the axial direction of the bearing (16), each layer of protrusions includes a plurality of protrusions (1601) arranged at equal intervals along the circumferential direction of the bearing (16), the plurality of protrusions (1601) in adjacent two layers are arranged in a staggered manner, the protrusions (1601) match the grooves (6011), and the plurality of protrusions (1601) are respectively embedded in the plurality of grooves (6011); an electromagnetic coil (1), a first dynamic sealing disc (3), a first sealing ring (4) and a first static sealing disc (5) are sleeved on the shaft section of the equipment rotating shaft (7) located inside the equipment, the electromagnetic coil (1), the first dynamic sealing disc (3), the first sealing ring (4) and the first static sealing disc (5) are arranged in sequence along the direction close to the bearing (16), a plurality of first spring pieces (2) are arranged between the electromagnetic coil (1) and the first dynamic sealing disc (3), and the first static sealing disc (5) is fixedly connected to the equipment rotating shaft (7); when the equipment rotating shaft (7) is in the initial static state, the first dynamic sealing disc (3) presses the first sealing ring (4) under the elastic force of the first spring piece (2), and the first sealing ring (4) is in close contact with the first static sealing disc (5) for sealing; when starting the rotation of the equipment rotating shaft (7), the electromagnetic coil (1) is simultaneously energized, the first dynamic sealing disc (3) slides on the equipment rotating shaft (7) and approaches the electromagnetic coil (1) under the magnetic attraction of the electromagnetic coil (1), the first spring piece (2) is compressed, the first dynamic sealing disc (3) is separated from the first static sealing disc (5), and the equipment rotating shaft (7) returns to the initial state after stopping.

2. A sealing structure for a rotating part according to claim 1, characterized in that: the first sealing ring (4) is a rubber ring.

3. A sealing structure for a rotating part, characterized in that: it includes a locking card (8), a support frame (9), a second spring piece (10), a second dynamic sealing disc (11), a second sealing ring (12), a second static sealing disc (13), an equipment housing (6) and an equipment rotating shaft (7); a circular through hole (601) for the equipment rotating shaft (7) to pass through is provided on the equipment housing (6), and the equipment rotating shaft (7) passes through the circular through hole (601) and extends into the equipment interior; The circular through-hole (601) is provided with several layers of grooves at equal intervals along its axial direction. Each layer of grooves includes several grooves (6011) arranged at equal intervals along the circumferential direction of the circular through-hole (601), and the several grooves (6011) of adjacent two layers are arranged in a staggered manner. A bearing (16) is installed in the circular through-hole (601). The equipment rotating shaft (7) is movably connected to the equipment housing (6) through the bearing (16). Several layers of protrusions are arranged on the outer wall of the bearing (16). The several layers of protrusions are arranged at equal intervals along the axial direction of the bearing (16). Each layer of protrusions includes several protrusions (1601) arranged at equal intervals along the circumferential direction of the bearing (16). The several protrusions (1601) of adjacent two layers are arranged in a staggered manner. The protrusions (1601) are matched with the grooves (6011), and the several protrusions (1601) are respectively embedded in the several grooves (6011). Both the locking card (8) and the support frame (9) are in a circular ring shape. A locking card (8), a support frame (9), a dynamic sealing disc II (11), a sealing ring II (12), and a static sealing disc II (13) are sleeved on the shaft section of the equipment rotating shaft (7) located inside the equipment. The locking card (8), the support frame (9), the dynamic sealing disc II (11), the sealing ring II (12), and the static sealing disc II (13) are arranged in sequence along the direction close to the bearing (16). The locking card (8), the support frame (9), and the static sealing disc II (13) are all fixed on the equipment rotating shaft (7), and the locking card (8) is in contact with the support frame (9). Several spring pieces II (10) are arranged between the support frame (9) and the dynamic sealing disc II (11). A spiral structure (701) is arranged on the shaft section of the equipment rotating shaft (7) in contact with the dynamic sealing disc II (11). When the equipment rotating shaft (7) is in the initial static state, the dynamic sealing disc II (11) squeezes the sealing ring II (12) under the elastic force of the spring pieces II (10), and the sealing ring II (12) is in close contact with the static sealing disc II (13) for sealing. When the equipment rotating shaft (7) is started to rotate, the dynamic sealing disc II (11) generates relative movement with the equipment rotating shaft (7) and approaches the support frame (9) under the rotation action of the spiral structure (701) of the equipment rotating shaft (7). The spring pieces II (10) are compressed, and the dynamic sealing disc II (11) is separated from the static sealing disc II (13). After the equipment rotating shaft (7) stops, it returns to the initial state.

4. A sealing structure for a rotating part according to claim 3, characterized in that: The sealing ring II (12) is a rubber ring.

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