Speed ​​reducer and mechanical equipment including speed reducer

Abstract

A reducer and a mechanical device including the reducer are provided. The reducer may include a housing, a first cavity, a second cavity and a third cavity connected to the first cavity are formed in the housing, the second cavity is connected to the third cavity where the transmission mechanism is located through a channel to be sealed, and the third cavity is filled with a flowing medium; a connecting shaft is arranged in the second cavity; a first sealing device is sleeved on the connecting shaft in a linearly movable manner, the first sealing device is used to allow the channel to be sealed to be connected to the second cavity or to disconnect the channel to be sealed from the second cavity in a linearly moving manner; and a transmission part, the transmission part is used to drive the first sealing device to move linearly to seal the channel to be sealed or connect the second cavity with the channel to be sealed, so as to prevent the flowing medium from overflowing from the channel to be sealed when the first cavity and / or the second cavity is inspected.

Description

Technical Field

[0001] The present disclosure relates to the technical field of mechanical equipment, and in particular to a reducer and mechanical equipment including the reducer. Background Art

[0002] The reducer is an independent component consisting of a gear drive, worm drive, or gear-worm drive enclosed in a rigid housing. It is often used as a reduction transmission device between the prime mover and the working machine. It plays the role of matching speed and transmitting torque between the prime mover and the working machine or actuator, and is widely used in modern machinery.

[0003] In the existing reducer, when the reducer is under maintenance, the flowing medium in the sealing cavity of the reducer is more likely to leak. Summary of the invention

[0004] In one aspect, a reducer with a built-in transmission mechanism is provided, comprising:

[0005] A shell, wherein a first cavity, a second cavity and a third cavity connected to the first cavity are formed in the shell, the second cavity is connected to the third cavity where the transmission mechanism is located through a passage to be sealed, and the third cavity is filled with a flowing medium;

[0006] A connecting shaft is disposed in the second cavity;

[0007] A first sealing device is sleeved on the connecting shaft in a linearly movable manner, and the first sealing device is used to allow the communication between the channel to be sealed and the second cavity or to disconnect the communication between the channel to be sealed and the second cavity in a linearly movable manner; and

[0008] The transmission part is used to drive the first sealing device to move linearly to seal the channel to be sealed or connect the second cavity with the channel to be sealed, so as to avoid the flow medium from overflowing from the channel to be sealed when inspecting the first cavity and / or the second cavity.

[0009] In another aspect, a mechanical device is provided, comprising: the reducer as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Other objects and advantages of the present disclosure will be apparent from the following description of the present disclosure with reference to the accompanying drawings and will help to have a comprehensive understanding of the present disclosure.

[0011] Figure 1 is a partial three-dimensional schematic diagram of a reducer according to an embodiment of the present disclosure;

[0012] Figure 2 yes Figure 1 The schematic axial cross-sectional view of the reducer at the connecting shaft 200 is shown;

[0013] Figure 3 yes Figure 1 The radial cross-sectional view of the reducer at the driving part 600 is shown;

[0014] Figure 4 yes Figure 2 A magnified schematic diagram of part A;

[0015] Figure 5 yes Figure 4 An enlarged schematic diagram of part B of FIG.

[0016] Figure 6 It is a schematic partial cross-sectional view of the first cavity according to an embodiment of the present disclosure.

[0017] In the above drawings, the meanings of the reference numerals are as follows:

[0018] 100-housing;

[0019] 110- first cavity;

[0020] 120- second cavity;

[0021] 130- third cavity;

[0022] 140-channel to be sealed;

[0023] 150-first step portion;

[0024] 160- second step portion;

[0025] 200-connecting shaft;

[0026] 300-first sealing device;

[0027] 310-sealing sleeve;

[0028] 320-first sealing ring;

[0029] 330-cover plate;

[0030] 331- positioning pin;

[0031] 340-sealing plate;

[0032] 400-transmission unit;

[0033] 410-worm gear;

[0034] 500-sealing cover;

[0035] 600-driving unit;

[0036] 610-worm;

[0037] 620-flange;

[0038] 630-adjusting shim;

[0039] 700-second sealing device;

[0040] 710-sealing ring;

[0041] 720-third sealing ring;

[0042] 730-Fourth sealing ring.

[0043] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0045] Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by ordinary technicians in the field. "First", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0046] In this document, unless otherwise specified, directional terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present disclosure, and do not indicate or imply that the device, element or component referred to must have a specific orientation, be constructed or operate in a specific orientation. It should be understood that when the absolute position of the described object changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms should not be understood as limiting the present disclosure.

[0047] The reducer with a transmission mechanism has a certain pressure (about 0.1MPa) because there are harmful gases and other flowing media inside. When the reducer needs to be repaired, it is necessary to seal and isolate the sealing interface connection with other components to ensure that the gas and other flowing media in the sealed cavity do not leak. However, it is difficult to ensure the free switching of sealing and unsealing of the structure under a certain pressure in actual maintenance operations.

[0048] In view of this, the embodiments of the present disclosure provide a reducer and a mechanical device including the reducer. The reducer may include: a housing, a first cavity, a second cavity and a third cavity connected to the first cavity are formed in the housing, the second cavity is connected to the third cavity where the transmission mechanism is located through a channel to be sealed, and the third cavity is filled with a flowing medium; a connecting shaft, which is arranged in the second cavity; a first sealing device, which can be linearly movably sleeved on the connecting shaft, and the first sealing device is used to allow the communication between the channel to be sealed and the second cavity or disconnect the communication between the channel to be sealed and the second cavity in the case of linear movement; and a transmission part, which is used to drive the first sealing device to move linearly to seal the channel to be sealed or connect the second cavity with the channel to be sealed, so as to avoid the flowing medium from overflowing from the channel to be sealed when the first cavity and / or the second cavity is inspected.

[0049] Figure 1 is a partial three-dimensional schematic diagram of a reducer according to an embodiment of the present disclosure; Figure 2 yes Figure 1 The schematic axial cross-sectional view of the reducer at the connecting shaft 200 is shown; Figure 3 yes Figure 1 The radial cross-sectional view of the reducer at the driving part 600 is shown; Figure 4 yes Figure 2 An enlarged schematic diagram of part A.

[0050] According to an embodiment of the present disclosure, Figure 1 to Figure 4 As shown, the reducer with a built-in transmission mechanism may include a housing 100 , a connecting shaft 200 , a first sealing device 300 and a transmission part 400 .

[0051] A first cavity 110 , a second cavity 120 and a third cavity 130 communicating with the first cavity 110 are formed in the housing 100 . The second cavity 120 communicates with the third cavity 130 where the transmission mechanism is located through a passage 140 to be sealed. The third cavity 130 is filled with a flowing medium.

[0052] The connecting shaft 200 is disposed in the second cavity 120. The first sealing device 300 is sleeved on the connecting shaft 200 and can be linearly moved. The first sealing device 300 is used to allow the communication between the sealed channel 140 and the second cavity 120 or disconnect the communication between the sealed channel 140 and the second cavity 120 when linearly moving.

[0053] The transmission part 400 is used to drive the first sealing device 300 to move linearly to seal the channel 140 to be sealed or connect the second cavity 120 with the channel 140 to be sealed, thereby preventing the flowing medium from overflowing from the channel 140 to be sealed when inspecting the first cavity 110 and / or the second cavity 120.

[0054] According to an embodiment of the present disclosure, the connecting shaft 200 may be connected to other components within the reducer.

[0055] According to an embodiment of the present disclosure, the flowing medium may refer to a toxic or harmful gas or liquid having a certain pressure (eg, 0.1 MPa).

[0056] According to an embodiment of the present disclosure, when the transmission part 400 rotates, the first sealing device 300 can be driven to move linearly in the direction of the axis of the connecting shaft 200, so that the linearly moving first sealing device 300 seals the channel 140 to be sealed between the second cavity 120 and the third cavity 130, thereby preventing the flow medium in the third cavity 130 from overflowing when the components in the first cavity 110 and / or the second cavity 120 are inspected.

[0057] According to the embodiment of the present disclosure, the first sealing device 300 moves linearly toward or away from the passage 140 to be sealed by rotating the transmission part 400 in a clockwise or counterclockwise direction, so as to switch between the connection or disconnection between the second cavity 120 and the third cavity 130, thereby avoiding the flow medium in the third cavity 130 from overflowing from the second cavity 120 when the reducer is repaired, which affects the health of the repair personnel. At the same time, less overflow of the flow medium also reduces the maintenance cost of the reducer.

[0058] Figure 5 yes Figure 4 An enlarged schematic diagram of part B.

[0059] In one embodiment, if Figure 4 and 5 As shown, the first sealing device 300 may include a sealing sleeve 310 and a first sealing ring 320 .

[0060] The sealing sleeve 310 is sleeved on the connecting shaft 200, and the sealing sleeve 310 includes a first sealing sleeve 310 and a second sealing sleeve 310 that are integrally connected, wherein the first sealing sleeve 310 has an external thread threadedly connected to the transmission part 400, and the second sealing sleeve 310 is inserted into the groove of the transmission part 400, and a first sealing groove is provided on the side of the second sealing sleeve 310 away from the first sealing sleeve 310.

[0061] The first sealing ring 320 is disposed in the first sealing groove, and is used to allow or disconnect the communication between the channel 140 to be sealed and the second cavity 120 when the transmission part 400 drives the sealing sleeve 310 to move linearly.

[0062] According to an embodiment of the present disclosure, when the transmission part 400 rotates, since the sealing sleeve 310 is threadedly connected to the transmission part 400 through an external thread, the sealing sleeve 310 moves linearly relative to the transmission part 400, so that the first sealing ring 320 on the sealing sleeve 310 can seal or unseal the sealed channel 140.

[0063] According to an embodiment of the present disclosure, the cross-section of the first sealing groove is an inverted trapezoid, which is used to prevent the first sealing ring 320 from falling off from the first sealing groove under the action of gravity.

[0064] According to an embodiment of the present disclosure, the cross-section of the first sealing groove may also be other polygonal shapes, such as a regular hexagon.

[0065] According to an embodiment of the present disclosure, the first sealing ring 320 may be an O-ring.

[0066] According to an embodiment of the present disclosure, in order to prevent the first sealing ring 320 from falling off from the first sealing groove under the action of its own gravity, the cross-section of the first sealing groove can be set to an inverted trapezoid so that the first sealing groove can limit the position of the first sealing ring 320.

[0067] like Figure 5 As shown, the first sealing sleeve 310 has a limiting groove.

[0068] According to an embodiment of the present disclosure, the first sealing device 300 may further include a cover plate 330 .

[0069] The cover plate 330 is connected to the housing 100 and the connecting shaft 200 at the transmission part 400 . A ring-shaped limit plate is provided on the side of the cover plate 330 close to the transmission part 400 . A positioning pin 331 inserted into the limiting groove is provided on the inner side of the limit plate. The positioning pin 331 is used to limit the circumferential rotation of the sealing sleeve 310 .

[0070] According to an embodiment of the present disclosure, the cover plate 330 may be an annular disc-shaped flange cover with a pin hole, and may be connected to the housing 100 by bolts.

[0071] According to an embodiment of the present disclosure, in order to prevent the first sealing device 300 from rotating circumferentially when the transmission part 400 rotates, a cover plate 330 may be provided, and a positioning pin 331 may be provided on the cover plate 330. The positioning pin 331 is inserted into a limiting groove in the sealing sleeve 310 of the first sealing device 300, so that when the transmission part 400 rotates circumferentially, the sealing sleeve 310 moves linearly under the action of the positioning pin 331 and the guiding wire of the limiting groove.

[0072] According to an embodiment of the present disclosure, the central axis of the first cavity 110 is not parallel to the central axis of the second cavity 120 , and the first cavity 110 extends from the circumferential edge of the housing 100 into the housing 100 .

[0073] According to an embodiment of the present disclosure, a central axis of the first cavity 110 and a central axis of the second cavity 120 may form a preset angle, for example, 90 degrees.

[0074] Figure 6 It is a schematic partial cross-sectional view of the first cavity according to an embodiment of the present disclosure.

[0075] like Figure 6 As shown, the reducer may further include a sealing cover 500 .

[0076] The sealing cover 500 is disposed at the outer end of the first cavity 110 , and the sealing cover 500 is used to prevent external debris from entering the reducer.

[0077] According to an embodiment of the present disclosure, the plane where the sealing cover 500 contacts the housing 100 is multi-stepped, and an annular second sealing ring for enhancing sealing is provided on at least one of the step-shaped planes.

[0078] According to the embodiment of the present disclosure, the sealing cover 50 is connected to the housing 100 by bolts. A second sealing ring is provided at the connection surface between the sealing cover 500 and the housing 100, and the second sealing ring can bear the sealing function in the cavity and can also be used as an external dustproof for the device.

[0079] According to an embodiment of the present disclosure, the second sealing ring may include but is not limited to an O-ring.

[0080] According to the embodiment of the present disclosure, the sealing between the sealing cover 500 and the housing 100 can be further strengthened through the multi-step stepped contact surface, which is beneficial to further improve the overall sealing of the reducer.

[0081] like Figure 3 As shown, the reducer may further include a driving portion 600 .

[0082] The driving part 600 is rotatably disposed in the first cavity 110 and is coupled to the transmission part 400 through a turbine. The driving part 600 is used to drive the transmission part 400 to rotate.

[0083] According to an embodiment of the present disclosure, in order to facilitate the rotation of the driving transmission part 400, a driving part 600 can be set in the first cavity 110, so that the transmission part 400 is rotated by rotating the driving part 600, and then the first sealing device 300 moves linearly under the transmission of the transmission part 400 to switch the sealing and unsealing of the sealed channel 140.

[0084] like Figure 3 and Figure 6 As shown, the reducer may further include a second sealing device 700 .

[0085] The second sealing device 700 is disposed at the outer end of the first cavity 110 , and is used to seal the gap between the driving unit 600 and the first cavity 110 .

[0086] According to an embodiment of the present disclosure, since the driving part 600 in the first cavity 110 is rotatable relative to the outer shell 100, in order to prevent the flowing medium from overflowing the reducer from the gap between the driving part 600 and the first cavity 110, a second sealing device 700 can be provided at the outer end of the first cavity 110 to seal the gap between the two.

[0087] like Figure 6 As shown, the outer end of the first cavity 110 includes a recessed portion, a first step portion 150 and a second step portion 160 .

[0088] The recessed portion is formed by recessing inward from the circumferential edge of the housing 100. The second step portion 160 is located relatively outside the first step portion 150, the inner diameter of the first step portion 150 is larger than the inner diameter of the main body of the first cavity 110, and the inner diameter of the second step portion 160 is larger than the inner diameter of the first step portion 150.

[0089] According to the embodiment of the present disclosure, the first step portion 150 and the second step portion 160 are connected to the second sealing device 700 , so that the sealing performance of the connection between the second sealing device 700 and the housing 100 can be enhanced.

[0090] like Figure 6 As shown, the second sealing device 700 includes a sealing ring 710. The sealing ring 710 has a mounting portion and an insertion portion, the mounting portion abuts against the first step portion 150, the insertion portion is inserted into the first cavity 110, the driving portion 600 passes through the sealing ring 710 and is inserted into the first cavity 110, and the sealing ring 710 is used to prevent the flow medium in the first cavity 110 from overflowing the reducer.

[0091] According to an embodiment of the present disclosure, an annular flange is disposed on the outer side of the sealing ring 710 , and the annular flange and the housing 100 may be connected by bolts for mounting and fixing the driving unit 600 .

[0092] According to an embodiment of the present disclosure, the sealing between the driving portion 600 and the first cavity 110 can be improved by means of the mounting portion and the insertion portion cooperating with the first step portion 150 and the second step portion 160, thereby preventing the flow medium in the third cavity 130 from entering the first cavity 110 through the second cavity 120 and overflowing the reducer through the gap between the driving portion 600 and the first cavity 110 in a non-maintenance state.

[0093] According to an embodiment of the present disclosure, the inner circumferential surface of the mounting portion has an annular second sealing groove.

[0094] like Figure 6 As shown, the second sealing device 700 may further include a third sealing ring 720. The third sealing ring 720 is disposed in the second sealing groove and is used to form a dynamic seal with the driving part 600 to prevent the flowing medium in the first cavity 110 from overflowing from the reducer through the gap between the driving part 600 and the sealing ring 710.

[0095] According to an embodiment of the present disclosure, the third sealing ring 720 can be a lip-shaped sealing ring, which is a contact-type dynamic sealing form and is tightly matched with the driving part 600. It can prevent the leakage of lubricating oil and prevent dust and impurities from entering the interior of the housing 100. At the same time, it can also effectively prevent the flowing medium from overflowing the reducer from the gap between the driving part 600 and the sealing ring 710.

[0096] According to an embodiment of the present disclosure, a circumferential surface of the insert portion contacting the housing 100 has a third sealing groove.

[0097] like Figure 6 As shown, the second sealing device 700 may further include a fourth sealing ring 730. The fourth sealing ring 730 is disposed in the third sealing groove and is used to prevent the flowing medium in the first cavity 110 from overflowing from the reducer through the gap between the first cavity 110 and the inserting portion of the sealing ring 710.

[0098] According to an embodiment of the present disclosure, the fourth sealing ring 730 can be an O-ring. By installing the fourth sealing ring 730 on the insertion portion of the sealing ring 710, the sealing ring 710 can be tightly connected to the housing 100 during installation, thereby ensuring that toxic and harmful flowing media does not leak from between the housing 100 and the sealing ring 710.

[0099] like Figure 6As shown, the first sealing device 300 may further include an annular sealing plate 340. The sealing plate 340 is disposed on a side of the sealing ring 710 away from the first cavity 110. The sealing plate 340 connects the sealing ring 710 to the housing 100 through bolts and keeps the third sealing ring 720 in the second sealing groove.

[0100] According to an embodiment of the present disclosure, the sealing plate 340 may be connected to the housing 100 by bolts, and apply a certain pressure to the third sealing ring 720 , so that a tight dynamic seal is formed between the third sealing ring 720 and the driving part 600 .

[0101] like Figure 6 As shown, the driving part 600 includes a worm 610. The inner end of the worm 610 located in the first cavity 110 is rotatably connected to the first cavity 110 through a sleeve, and the outer end of the worm 610 is located outside the housing 100. The worm 610 is in transmission connection with the transmission part 400.

[0102] According to an embodiment of the present disclosure, the outer end of the worm 610 extending out of the sealing plate 340 may be configured as a polygonal shaft body to facilitate the rotation of the worm 610. For example, it may be a quadrilateral square shaft.

[0103] According to an embodiment of the present disclosure, plug Figure 3 and 6 By rotating the worm 610 , the transmission part 400 can be driven to rotate, thereby driving the first sealing device 300 to move linearly to complete the sealing or unsealing operation of the channel 140 to be sealed.

[0104] According to an embodiment of the present disclosure, a bushing is provided at the connection between the worm 610 and the housing 100 to reduce the wear of the worm 610 caused by the friction between the worm 610 and the housing 100 .

[0105] like Figure 6 As shown, the driving part 600 located in the first cavity 110 includes a first body rotatably connected to the first cavity 110 and a second body rotatably connected to the first sealing device 300 , wherein the joint portion of the first body and the second body forms a flange 620 .

[0106] According to an embodiment of the present disclosure, the driving part 600 may further include an adjustment gasket 630 .

[0107] The adjusting gasket 630 is disposed on the second body between the first sealing device 300 and the flange 620 , and the position of the worm 610 is adjusted by changing the thickness of the adjusting gasket 630 .

[0108] According to an embodiment of the present disclosure, in order to achieve better transmission between the worm 610 and the transmission part 400 , the contact position between the worm 610 and the transmission part 400 may be adjusted by using adjustment gaskets 630 with different thicknesses.

[0109] like Figure 3 to Figure 5 As shown, the transmission part 400 may include a worm wheel 410. The inner surface of the worm wheel 410 has an internal thread, and the worm wheel 410 is meshed and driven with the first sealing device 300 through the internal thread.

[0110] According to an embodiment of the present disclosure, when the worm wheel 410 is meshed with the worm 610 , the internal threads on the inner surface drive the first sealing device 300 to move linearly, thereby sealing and unsealing the channel 140 to be sealed.

[0111] According to the embodiment of the present disclosure, in the case of overhaul, after removing the sealing cover 500, the polygonal shaft at the head (outer end) of the worm 610 can be rotated forwardly with a wrench, thereby driving the worm wheel 410 to rotate forwardly, so that the sealing sleeve 310 threadedly connected to the worm wheel 410 moves downward, and in response, the first sealing ring 320 on the sealing sleeve 310 presses the channel 140 to be sealed between the second cavity 120 and the third cavity 130 to achieve sealing. After the overhaul is completed, the square shaft at the head of the worm 610 can be rotated in the opposite direction with a wrench, thereby driving the worm wheel 410 to rotate in the opposite direction, so that the sealing sleeve 310 threadedly connected to the worm wheel 410 moves upward until the first sealing ring 320 on the sealing sleeve 310 is separated from the channel 140 to be sealed, so as to release the sealing state.

[0112] According to the embodiment of the present disclosure, by adopting the transmission mechanism of the worm wheel 410 and the worm 610, the transmission is relatively smooth when switching between sealing and unsealing, and has reverse self-locking property. Furthermore, maintenance personnel can complete the switching between sealing and unsealing relatively quickly and reliably through the above transmission mechanism.

[0113] According to an embodiment of the present disclosure, a mechanical device may include the above-mentioned speed reducer.

[0114] According to an embodiment of the present disclosure, the mechanical equipment includes a transporter, a nuclear power equipment, a radiotherapy equipment, a boiler equipment, a coking equipment, a steelmaking equipment or a petroleum refining equipment.

[0115] According to the embodiment of the present disclosure, the first sealing device 300 is moved linearly toward or away from the passage 140 to be sealed by rotating the transmission part 400 in different directions, so as to facilitate switching between the connection or disconnection between the second cavity 120 and the third cavity 130, thereby avoiding the overflow of the flowing medium in the third cavity 130 from the second cavity 120 when the reducer of the mechanical equipment is repaired, which affects the health of the repair personnel. At the same time, less overflow of the flowing medium also reduces the maintenance cost of the reducer.

[0116] Those skilled in the art can understand that the embodiments described above are exemplary and can be improved by those skilled in the art. The structures described in various embodiments can be freely combined without causing conflicts in structure or principle.

[0117] Although some embodiments according to the overall technical concept of the present disclosure have been shown and described, those skilled in the art will appreciate that changes may be made to these embodiments without departing from the principles and spirit of the overall technical concept of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A reducer with a built-in transmission mechanism, characterized in that: include: A shell, wherein a first cavity, a second cavity communicating with the first cavity, and a third cavity are formed in the shell, the second cavity is communicated with the third cavity where the transmission mechanism is located through a passage to be sealed, and the third cavity is filled with a flowing medium; A connecting shaft is disposed in the second cavity; a first sealing device, which is sleeved on the connecting shaft in a linearly movable manner, and is used for allowing the communication between the passage to be sealed and the second cavity or disconnecting the communication between the passage to be sealed and the second cavity in a linearly movable manner; as well as A transmission part is used to drive the first sealing device to move linearly to seal the channel to be sealed or connect the second cavity with the channel to be sealed, thereby preventing the flow medium from overflowing from the channel to be sealed when inspecting the first cavity and / or the second cavity.

2. The reducer according to claim 1, characterized in that: The first sealing device comprises: A sealing sleeve, sleeved on the connecting shaft, the sealing sleeve comprising a first sealing sleeve and a second sealing sleeve connected in one piece, wherein the first sealing sleeve has an external thread threadedly connected to the transmission part, the second sealing sleeve is inserted into a groove of the transmission part, and a first sealing groove is provided on a side of the second sealing sleeve away from the first sealing sleeve; The first sealing ring is arranged in the first sealing groove, and is used to allow the communication between the channel to be sealed and the second cavity or to disconnect the communication between the channel to be sealed and the second cavity when the transmission part drives the sealing sleeve to move linearly.

3. The reducer according to claim 2, characterized in that: The cross section of the first sealing groove is an inverted trapezoid, which is used to prevent the first sealing ring from falling off from the first sealing groove under the action of gravity.

4. The reducer according to claim 2, characterized in that: The first sealing sleeve has a limiting groove; The first sealing device also includes: A cover plate is connected to the housing and the connecting shaft at the transmission part. A ring-shaped limit plate is provided on one side of the cover plate close to the transmission part. A positioning pin inserted into the limit groove is provided on the inner side of the limit plate. The positioning pin is used to limit the circumferential rotation of the sealing sleeve.

5. The reducer according to any one of claims 1 to 4, characterized in that: The central axis of the first cavity is not parallel to the central axis of the second cavity, and the first cavity extends from the circumferential edge of the shell into the shell.

6. The reducer according to claim 5, characterized in that: Also includes: A sealing cover is arranged at the outer end of the first cavity, and the sealing cover is used to prevent external debris from entering the reducer.

7. The reducer according to claim 6, characterized in that: The plane where the sealing cover contacts the housing is in a multi-stepped shape, and an annular second sealing ring for enhancing the sealing performance is arranged on at least one of the stepped planes.

8. The reducer according to claim 1, characterized in that: Also includes: The driving part is rotatably disposed in the first cavity and connected to the transmission part, and the driving part is used to drive the transmission part to rotate.

9. The reducer according to claim 8, characterized in that: Also includes: The second sealing device is arranged at the outer end of the first cavity, and is used to seal the gap between the driving part and the first cavity.

10. The reducer according to claim 9, characterized in that: The outer end of the first cavity comprises: A recessed portion is formed by being recessed inward from the peripheral edge of the housing; A first step portion and a second step portion, wherein the second step portion is located at an outer side of the first step portion, the inner diameter of the first step portion is larger than the inner diameter of the main body of the first cavity, and the inner diameter of the second step portion is larger than the inner diameter of the first step portion.

11. The reducer according to claim 10, characterized in that: The second sealing device comprises: The sealing ring has a mounting portion and an insertion portion, wherein the mounting portion abuts against the first step portion, the insertion portion is inserted into the first cavity, the driving portion passes through the sealing ring and is inserted into the first cavity, and the sealing ring is used to prevent the flow medium in the first cavity from overflowing the reducer.

12. The reducer according to claim 11, characterized in that: The inner circumferential surface of the mounting portion is provided with an annular second sealing groove; The second sealing device also includes: A third sealing ring is disposed in the second sealing groove, and is used to form a dynamic seal with the driving part to prevent the flowing medium in the first cavity from overflowing from the reducer through a gap between the driving part and the sealing ring.

13. The reducer according to claim 11, characterized in that: The circumferential surface of the inserting portion in contact with the housing has a third sealing groove; The second sealing device also includes: A fourth sealing ring is arranged in the third sealing groove, and is used to prevent the flowing medium in the first cavity from overflowing from the reducer through a gap between the first cavity and the inserting portion of the sealing ring.

14. The reducer according to claim 12, characterized in that: The first sealing device also includes: An annular sealing plate is arranged on a side of the sealing ring away from the first cavity. The sealing plate connects the sealing ring to the housing through bolts and keeps the third sealing ring in the second sealing groove.

15. The reducer according to claim 8, characterized in that: The driving unit comprises: A worm, wherein the inner end of the worm located in the first cavity is rotationally connected to the first cavity through a shaft sleeve, and the outer end of the worm is located outside the housing, and the worm is transmission-connected to the transmission part.

16. The reducer according to claim 15, characterized in that: The driving part located in the first cavity includes a first body rotatably connected to the first cavity and a second body rotatably connected to the first sealing device, wherein a flange is formed at a joint of the first body and the second body: The driving unit further includes: An adjusting gasket is arranged on the second main body between the first sealing device and the flange, and the position of the worm is adjusted by changing the thickness of the adjusting gasket.

17. The reducer according to claim 1, characterized in that: The transmission part comprises: A worm wheel, wherein the inner surface of the worm wheel has an internal thread, and the worm wheel is meshed and driven with the first sealing device through the internal thread.

18. A mechanical device, characterized in that: include: The reducer according to any one of claims 1 to 17.

19. The mechanical device according to claim 18, characterized in that The mechanical equipment includes a transporter, nuclear power equipment, radiotherapy equipment, boiler equipment, coking equipment, steelmaking equipment or petroleum refining equipment.

Images