Mechanical sealing mechanism, cooling sealing device and equipment
By introducing stationary and dynamic ring assemblies into the mechanical seal device, combined with the axial flow vane pump structure, the problem of poor cooling and lubrication was solved, achieving efficient cooling and lubrication functions, simplifying the structure and reducing costs.
Patent Information
- Application Number
- CN202520561854.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-27
AI Technical Summary
Existing mechanical seal devices are ineffective in cooling and lubrication, especially in situations with limited space, and existing solutions are complex and costly.
Design a mechanical seal mechanism comprising a stationary ring assembly and a rotating ring assembly. The rotating ring is sealed to the stationary ring by an elastic component. An axial flow blade is provided on the outer periphery of the transmission component, forming a pump structure for pumping and circulating the cooling medium.
It achieves efficient cooling and lubrication, extends the service life of mechanical seals, simplifies the structure, and reduces costs.
Smart Images
Figure CN223908463U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of sealing structure, specifically relates to a mechanical sealing mechanism, cooling sealing device and equipment. BACKGROUND
[0002] Mechanical seal sealing refers to the device that prevents fluid leakage by at least one pair of end faces perpendicular to the rotation axis under the action of fluid pressure and compensation mechanism elastic force (or magnetic force) and the cooperation of auxiliary sealing, and the pair of end faces keep close and slide relatively. It is often used as a shaft sealing device for rotating fluid machinery (such as a pump with a motor). Since the transmission shaft penetrates the inside and outside of the whole rotating machinery, there must be a circumferential gap between the shaft and the equipment. In order to prevent the medium in the equipment from leaking outward or the medium outside the equipment from leaking inward, a shaft sealing device must be provided to prevent leakage. Because mechanical seal has the advantages of small leakage and long service life, at present, mechanical seal is the most important shaft sealing method for these equipment. However, because the two end faces of the existing mechanical seal usually keep close and slide relatively, a large amount of heat is generated by friction.
[0003] In order to cool, generally need to supply cooling liquid to the mechanical seal for lubrication and cooling. But most of the mechanical seal is only immersed in the cooling liquid, and the cooling liquid itself does not flow, which makes the cooling and lubrication effect not very good. Especially when the equipment space is limited, the cooling liquid is less, the cooling and lubrication effect of the mechanical seal is often unsatisfactory. In order to solve this problem, some people also install oil extractor and other devices to lubricate and cool the mechanical seal by flushing the cooling liquid, and take away the heat generated by friction, but this way is relatively complex in structure and high in cost.
[0004] Taking a water pump with a motor as an example, when the motor is running, a small part of the loss will always become heat, in order to prevent the heat from gathering and causing the temperature to be too high to damage the motor or affect the normal operation of the motor, it must continuously dissipate the heat. Therefore, closed type motors with cooling liquid, cooling sleeve, cooling pipeline and other complex structures have gradually appeared in the market. SUMMARY
[0005] The utility model discloses a mechanical sealing mechanism, cooling sealing device and equipment with simple structure, low cost, shaft sealing function and conveying function, and heat dissipation by using flow conveying function.
[0006] The utility model provides a mechanical seal mechanism for installing between the main shaft and the mounting body forms the seal, has such characteristics: including: static ring subassembly, fixed mounting on the mounting body for the main shaft passes through, and has static ring, dynamic ring subassembly, is located in static ring subassembly one side, can be relative static ring subassembly and carry out the activity, wherein, dynamic ring subassembly has: dynamic ring, set up in the position close to static ring, transmission component, install on the main shaft and follow the main shaft and rotate, and elastic component, be located between dynamic ring and transmission component, one end abuts transmission component, the other end pushes dynamic ring to the side of static ring and makes dynamic ring and static ring abut to realize the seal, transmission component contains transmission main part and sets up at least two axial flow type blades on transmission main body outside circumference.
[0007] In the mechanical seal mechanism provided by the utility model, the main shaft can be provided with a limiting pin for limiting the transmission main body on the main shaft, the main shaft is provided with an insertion hole, the bottom inner side of the transmission main body is provided with a limiting groove, one end of the limiting pin is inserted into the insertion hole, and the other end is inserted into the limiting groove.
[0008] In the mechanical seal mechanism provided by the utility model, the side of the transmission main body facing the static ring can be recessed inward to form an installation groove, the elastic component and the dynamic ring are sequentially stacked in the installation groove, and the transmission main body is provided with a through hole communicating the outside and the installation groove.
[0009] In the mechanical seal mechanism provided by the utility model, the elastic component can be a spring, the spring is arranged between the dynamic ring and the transmission main body, the dynamic ring can abut against the static ring under the pushing of the spring, the dynamic ring assembly further comprises a push ring, the push ring is located between the side, away from the static ring, of the dynamic ring and the spring, and the push ring abuts against the end face of the dynamic ring under the action of the spring, or the elastic component is a wave spring or a butterfly spring, and one end of the wave spring or the butterfly spring, facing the dynamic ring, is provided with a plane for abutting against the end face of the dynamic ring.
[0010] In the mechanical seal mechanism provided by the utility model, the static ring assembly can further comprise a sealing sleeve for sealing between the static ring and the mounting body, the static ring is in clearance fit with the outer periphery of the main shaft, and the sealing sleeve is sleeved on the outer periphery of the static ring, the dynamic ring assembly can further comprise a sealing ring for sealing between the dynamic ring and the main shaft, and the side of the dynamic ring, facing the elastic component, is recessed inward to form an annular groove, and the sealing ring is arranged in the annular groove.
[0011] In the mechanical seal mechanism provided by the utility model, the side of the dynamic ring, facing the static ring, can be outwardly protruding to form an abutting boss for abutting against the end face of the static ring, the inner wall of the transmission main body is provided with a positioning portion, and the outer periphery of the dynamic ring is provided with a positioning matching portion matched with the positioning portion.
[0012] The utility model discloses still proposed a kind of cooling sealing mechanism, with such features, comprising: mounting body and main shaft, cooling partition, be placed on the outside of mounting body, and with the through hole for main shaft to pass through;Mechanical sealing mechanism, for the mechanical sealing mechanism as described above;Wherein, axial flow type blade is at least partially located in through hole, cooling flow channel for cooling medium to flow through is equipped between mounting body, main shaft and cooling partition.
[0013] In the cooling sealing device provided by the utility model, the mounting body can be a motor shell or a motor end cover, the main shaft can be a motor output shaft, the cooling partition portion can extend along the axial direction of the output shaft to surround the motor shell, the cooling flow channel can have an outer flow channel located on the outside of the cooling partition portion and an inner flow channel located between the cooling partition portion and the motor shell, and the cooling medium in the outer flow channel can be pumped by the axial flow type blade to flow from the through hole to the inner flow channel.
[0014] In the cooling sealing device provided by the utility model, the mounting body can be a motor shell or a motor end cover, the main shaft can be a motor output shaft, the cooling partition portion can extend along the axial direction of the output shaft to surround the motor shell, the cooling flow channel can have an outer flow channel located on the outside of the cooling partition portion and an inner flow channel located between the cooling partition portion and the motor shell, and the cooling medium in the outer flow channel can be pumped by the axial flow type blade to flow from the through hole to the inner flow channel.
[0015] The utility model discloses still proposed a kind of equipment, with such features, at least including: cooling sealing mechanism, wherein, cooling sealing mechanism for the cooling sealing mechanism as described above.
[0016] Effects of the utility model
[0017] According to the mechanical sealing mechanism, the cooling sealing device and the equipment provided by the utility model, the static ring assembly and the dynamic ring assembly are arranged, the dynamic ring is attached to the end surface of the static ring by the pressure of the elastic component to realize the sealing effect. The axial flow type blade is arranged on the outer periphery of the transmission body of the transmission component, and a complete pump structure is formed in cooperation with the inner wall of the through hole (equivalent to the pump body of the axial flow type blade). The transmission component can pump the cooling medium during rotation with the main shaft. The design of the axial flow type blade enables the cooling medium to flow along the axial direction, continuously pumps the surrounding cooling medium along the axial direction, and better sends the cooling medium from one specified area to another area in need for cooling, lubrication or other purposes. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is the structure diagram of the embodiment of the utility model.
[0019] Figure 2 is the cross-sectional schematic view of the embodiment of the utility model.
[0020] Figure 3It is the cooling flow channel circulation schematic diagram of the embodiment of the utility model.
[0021] Figure 4 It is the structure exploded view of the mechanical seal mechanism of the embodiment of the utility model.
[0022] Figure 5 It is the structure section view of the mechanical seal mechanism of the embodiment of the utility model.
[0023] Figure 6 It is the structure section view of the mechanical seal mechanism of the embodiment of the utility model.
[0024] Figure 7 It is the installation structure exploded view of the dynamic ring and the transmission ring of the embodiment of the utility model.
[0025] Figure 8 It is the top view of the dynamic ring of the embodiment of the utility model.
[0026] Figure 9 It is the cross section view of the dynamic ring of the embodiment of the utility model.
[0027] Figure 10 It is the perspective view of the transmission ring of the embodiment of the utility model.
[0028] Reference signs: equipment 100, shell 10, pump body 20, impeller 21, installation body 30, main shaft 31, cooling seal device 40, cooling separation part 41, through hole 411, body part 412, end part 413, mechanical seal mechanism 42, static ring assembly 421, static ring 4211, sealing sleeve 4212, dynamic ring assembly 422, dynamic ring 4221, abutting boss 42211, annular groove 42212, positioning matching part 42213, push ring 4222, sealing ring 4223, transmission part 423, transmission main body 4231, installation groove 42311, positioning part 42312, limiting groove 42313, axial flow blade 4232, through hole 4233, elastic part 424, outer flow channel 51, inner flow channel 52, backflow passage 53, limiting pin 61. DETAILED DESCRIPTION
[0029] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the mechanical seal mechanism, cooling seal device and equipment of the utility model are specifically described below in combination with embodiments and drawings.
[0030] <Embodiment 1>
[0031] Figure 1 It is the structure diagram of the embodiment of the utility model.
[0032] Figure 2 It is the cross section schematic diagram of the embodiment of the utility model.
[0033] The embodiment provides a device 100, which takes a water pump with a motor as an example, as shown in Figure 1 and Figure 2 , the device 100 comprises a pump body 20 and a cooling sealing device 40, the cooling sealing device 40 is installed on the pump body 20, wherein the cooling sealing device 40 comprises a shell 10, a mounting body 30, a main shaft 31, a cooling partition 41 and a mechanical sealing mechanism 42, the mounting body 30 is a motor shell (as shown in Figure 2 , Figure 3 ) or a motor end cover, the main shaft 31 is an output shaft of the motor, and the main shaft 31 can rotate. The cooling partition 41 is arranged between the motor and the shell 10, is located outside the motor and has a through hole 411 for the main shaft 31 to pass through, and the mechanical sealing mechanism 42 is installed between the main shaft 31 and the mounting body 30 and seals between the mounting body 30 (such as the motor end cover) and the main shaft 31.
[0034] Figure 3 is a cooling flow channel circulation schematic diagram of the embodiment of the utility model.
[0035] Specifically, the cooling partition 41 is arranged between the outside of the mounting body 30 and the inside of the shell 10 (such as being fixed to the inside of the shell 10 or the outside of the mounting body 30 through a connecting piece such as a screw), has a body part 412 and an end part 413, the body part 412 extends along the output shaft in the axial direction to surround the motor shell, and the end part 413 is located at one end of the body part and is provided with the through hole 411 in the middle of the end part 413. The mounting body 30, the main shaft 31 and the cooling partition 41 are provided with a cooling flow channel for the cooling medium to flow through, the cooling medium is usually a flowable low-temperature liquid medium, and heat generated during motor operation is taken away and cooled through the flow of the cooling medium. The cooling partition 41 separates between the outside of the mounting body 30 and the inside of the shell 10, the cooling flow channel has an outer flow channel 51 between the outside of the cooling partition 41 and the inside of the shell 10, an inner flow channel 52 between the inside of the cooling partition 41 and the outer wall of the mounting body 30 and a return passage 53 between the inner flow channel 52 and the outer flow channel 51, and the inner flow channel 52 and the outer flow channel 51 are connected through the return passage 53. When the cooling medium can flow circularly between the inner flow channel 52 and the outer flow channel 51, the heat on the motor shell can be taken away continuously, and then heat dissipation and cooling are performed through the shell 10.
[0036] Figure 4 is a structural exploded view of the mechanical sealing mechanism of the embodiment of the utility model.
[0037] Figure 5 is a structural sectional view of the mechanical sealing mechanism of the embodiment of the utility model installed on the main shaft.
[0038] Figure 6is a sectional view of the mechanical sealing mechanism of the embodiment of the utility model.
[0039] As shown in Figures 3-6 The mechanical sealing mechanism 42 is used for installing between the motor shell (i.e. the mounting body 30) and the main shaft 31, and sealing between the motor shell and the main shaft 31. The mechanical sealing mechanism 42 comprises a static ring assembly 421 and a dynamic ring assembly 422, the static ring assembly 421 is fixedly installed on the end face of the motor shell and is passed through by the main shaft 31, and the dynamic ring assembly 422 is sleeved on the main shaft 31 and is located at one side of the static ring assembly 421.
[0040] In the embodiment, the static ring assembly 421 has a static ring 4211 and a sealing sleeve 4212, the middle part mounting hole of the static ring 4211 is used for the main shaft 31 to pass through, and the sealing sleeve 4212 is sleeved on the outer periphery of the static ring 4211, so that the static ring 4211 can be sealingly fixed on the motor shell or the motor end cover through the sealing sleeve 4212.
[0041] The dynamic ring assembly 422 has a dynamic ring 4221, a push ring 4222, a transmission component 423 and an elastic component 424, the transmission component 423 is sleeved on the main shaft 31 and rotates along with the main shaft 31, the elastic component 424 is arranged between the dynamic ring 4221 and the transmission component 423, one end of the elastic component 424 abuts against the transmission component 423, and the other end of the elastic component 424 can push the dynamic ring 4221 to the side where the static ring 4211 is located, so that the dynamic ring 4221 abuts against the static ring 4211 to realize sealing.
[0042] The transmission component 423 is a transmission ring, which has a circular transmission body 4231 and axial flow vanes 4232 arranged on the outer periphery of the transmission body 4231. In order to make the transmission ring more stable when rotating, the axial flow vanes 4232 are symmetrically arranged at least in two pieces. When installed, at least part of the axial flow vanes 4232 are located in the through hole 411, and the transmission ring and the inner wall of the through hole 411 (equivalent to the pump body of the axial flow vanes) can cooperate to form a complete pump structure. When the transmission component 423 rotates along with the main shaft 31, the axial flow vanes 4232 can pump and send the cooling medium, continuously pumping the cooling medium around the mechanical seal mechanism 42 in the axial direction, pumping the cooling medium in the outer flow channel 51 into the inner flow channel 52 through the through hole 441, and combining the return flow channel 53 to realize the circulation of the cooling medium. The cooling medium can take away the heat of the dynamic ring 4221, the static ring 4211 and the motor, and cooling is realized. In particular, when the axial flow vanes 4232 are completely located in the through hole 411, the pumping effect is best. Therefore, the mechanical seal mechanism 41 of the embodiment can not only seal but also realize the dual functions of pumping and cooling. Since the transmission ring and the main shaft are arranged in the axial direction in the through hole 411, the axial flow vanes can pump the cooling medium in the axial direction, so that the cooling medium is more smoothly and concentratedly transported, and the cooling effect is better. In addition, the smaller the gap between the axial flow vanes 4232 and the through hole 411, the better the pumping effect without affecting the installation.
[0043] In another embodiment, the cooling medium can be lubricating oil, which can not only cool but also lubricate the friction pair plane between the static ring and the dynamic ring during flowing.
[0044] In the embodiment, the dynamic ring 4221 is located on one side of the static ring 4211 and close to the static ring 4211, the push ring 4222 is located on the side of the dynamic ring 4221 away from the static ring 4211, and the elastic component 424 is a spring which is pressed between the push ring 4222 and the transmission body 4231. The side of the dynamic ring 4221 facing the static ring 4211 protrudes outward to form a setting boss 42211 for setting on the end face of the static ring 4211, and the side of the dynamic ring 4221 facing the push ring 4222 is recessed inward to form an annular groove 42212 in which a sealing ring 4223 is arranged. The installation of the sealing sleeve 4212 and the sealing ring 4223 enables the outer side of the static ring and the inner side of the dynamic ring to be sealed, so as to realize the sealing effect of the whole mechanical seal mechanism. The push ring 4222 is arranged between the dynamic ring 4221 and the spring, which can enable the spring to stably act on the dynamic ring 4221 and form a complete O-ring groove between the annular groove 42212 of the dynamic ring 4221 and the push ring 4222 for installing the sealing ring 4223.
[0045] Further, in the embodiment, the spring is preferably arranged asFigure 4 The disc spring is wide, and the disc spring with wide diameter is used, so that the installation and the effect on the movable ring are more stable.
[0046] As shown in Figure 6 The transmission main body 4231 is recessed inward on the side facing the static ring 4211 to form a mounting groove 42311, and the spring, the push ring 4222 and the movable ring 4221 are sequentially stacked in the mounting groove 42311. The movable ring 4221 is tightly attached to the end surface of the static ring 4211 to form a seal under the pushing of the spring. The transmission main body 4231 is also provided with a through hole 4233 communicating between the outside and the mounting groove 42311, and the cooling medium can enter the mounting groove 42311 through the through hole 4233, so that the internal spring, the push ring 4222 and the movable ring 4221 and other components are immersed in the cooling medium, and these parts have a certain cooling effect.
[0047] As shown in Figure 5 The bottom of the transmission main body 4231 of the transmission ring on the main shaft 31 is also provided with a limiting pin 61 for limiting the transmission main body 4231 on the main shaft 31. One end of the limiting pin 61 is inserted into the main shaft 31, and the other end is inserted into the limiting groove 42313 on the inside of the bottom of the transmission main body 4231. The limiting pin 61 limits the axial position of the transmission ring and the circumferential position between the main shaft 31 and the transmission ring, and forms axial and circumferential positioning.
[0048] Figure 7 It is the mounting structure exploded view of the movable ring and the transmission ring of the embodiment of the utility model.
[0049] Figure 8 It is the top view of the movable ring of the embodiment of the utility model.
[0050] Figure 9 It is the sectional view of the movable ring of the embodiment of the utility model.
[0051] Figure 10 It is the perspective view of the transmission ring of the embodiment of the utility model.
[0052] As shown in Figures 7-10As shown, in order to position the dynamic ring 4221, the inner wall of the mounting groove 42311 is further formed with a positioning portion 42312, and the outer periphery of the dynamic ring 4221 is formed with a positioning matching portion 42213 matched with the limiting portion. In the embodiment, the positioning portion 42312 is an arc-shaped protrusion protruding inward from the inner wall of the mounting groove 42311, and the positioning matching portion 42213 is an arc-shaped matching groove having a matching shape with the arc-shaped protrusion. In the embodiment, the arc-shaped protrusion and the arc-shaped matching groove are both provided with four, and are uniformly distributed on the inner wall of the mounting groove 42311 and the outer wall of the dynamic ring 4221, and the arc-shaped protrusion and the arc-shaped matching groove are one-to-one corresponding. In actual situations, only one or two or other quantities can also be provided. The cooperation of the arc-shaped protrusion and the arc-shaped matching groove forms circumferential positioning between the transmission ring and the dynamic ring 4221, and the axial and circumferential positioning between the transmission ring and the main shaft is combined to form an integral body of the main shaft, the transmission ring and the dynamic ring, which can rotate together and has high synchronicity. In addition, the gap between the dynamic ring 4221 and the main shaft 31 is as small as possible without affecting the installation.
[0053] As shown in the figure, Figures 2-3 When the mechanical seal mechanism 42 is installed, the transmission component 423 is just placed in the through hole 411 of the cooling separation portion 41, and the outer flow channel 51 can communicate with the inner flow channel 52 through the through hole 411. When the transmission component 423 rotates, the axial flow blade 4232 can pump the cooling medium in the through hole 411, and continuously pump the cooling medium in the outer flow channel 51 to the inner flow channel 52 through the through hole 411 during pumping. Since the outer ring of the transmission ring is uniformly distributed with a plurality of axial flow blades 4232 (the number of blades is preferably ≥2), as the main shaft 31 rotates, it is equivalent to rotating an impeller. In combination with the through hole 411, a complete pump structure is formed, and the axial flow blade 4232 can continuously pump the cooling medium around the mechanical seal mechanism, thereby realizing heat dissipation, lubrication and other functions.
[0054] In addition, in the embodiment, the liquid level of the cooling medium should be higher than the friction surface of the dynamic ring and the static ring of the mechanical seal mechanism (i.e. the surface where the two are attached) or completely immerse the friction surface of the dynamic ring and the static ring of the mechanical seal mechanism, which is beneficial to the cooling and lubrication of the mechanical seal mechanism and prolongs the service life.
[0055] Working principle of the embodiment:
[0056] When the motor is running, the cooling medium (low-temperature liquid medium) in the outer flow channel 51 will be pumped by the axial flow vanes of the transmission ring to the inner flow channel 52, and then the heat emitted by the motor will be continuously taken away, and then the absorbed heat will be continuously emitted through the outer shell 10 to achieve heat dissipation and cooling. The low-temperature liquid medium thus circulates between the outer flow channel and the inner flow channel, and performs circulating cooling on the dynamic ring, the static ring and the motor, so that the motor can run for a long time without fear of burning the motor. At the same time, with the continuous pumping of the low-temperature liquid medium, the friction end faces of the static ring 4211 and the dynamic ring 4221 will also be continuously washed by the low-temperature liquid medium, thereby taking away a large amount of heat generated by the friction of the sealing end faces, playing a very good cooling effect, greatly improving the working environment of the mechanical seal mechanism 42, and effectively prolonging the service life of the mechanical seal mechanism 42.
[0057] In addition, as shown in Figure 2 The bottom end of the main shaft 31 extends out of the outer shell 10 and into the pump body 20 to provide the impeller 21, which rotates under the driving of the main shaft 31 to realize the pumping function of the water pump itself.
[0058] <Embodiment 2>
[0059] In this embodiment, based on the above-mentioned embodiment 1, if the selected spring is a wave spring or a butterfly spring, and the top (the end facing the dynamic ring 4221) has a wide, complete and certain strength flat surface that can directly play the same role as the push ring 4222, the additional push ring 4222 can be cancelled, and the dynamic ring 4221 can be directly pushed to adhere to the static ring 4211 through the top of the spring. That is, the flat surface of the top of the spring directly abuts against the end of the dynamic ring 4221, which can stably abut against and act on the dynamic ring 4221, and also form a complete O-ring groove with the annular groove 42212 of the dynamic ring 4221 for installing the sealing ring 4223.
[0060] Effects of the embodiment
[0061] The above-mentioned embodiment provides a mechanical seal mechanism, a cooling sealing device and equipment. Since the static ring assembly and the dynamic ring assembly are provided, the dynamic ring adheres to the end face of the static ring by the pressure of the elastic component to achieve the sealing effect. The axial flow vanes are arranged on the outer periphery of the transmission body of the transmission component, and a complete pump structure is formed in cooperation with the inner wall of the through hole (equivalent to the pump body of the axial flow vanes). The transmission component can pump the cooling medium during rotation with the main shaft. The design of the axial flow vanes enables the cooling medium to flow along the axial direction, continuously pumps the surrounding cooling medium along the axial direction, and better sends the cooling medium from one specified area to another area in need for cooling, lubrication or other purposes.
[0062] Further, the backflow channel set between the outer flow channel and the inner flow channel can realize the circulation of the cooling medium according to the need. The cooling medium can further realize the function of absorbing heat in the high-pressure area (or low-pressure area) and dissipating heat in the low-pressure area (or high-pressure area) through the backflow channel. In addition, the friction end surfaces of the static ring and the dynamic ring can be continuously flushed at the same time, and a large amount of heat generated by the friction of the sealing end surface can be taken away, so that good lubrication and cooling effects are achieved, and the service life of the mechanical sealing mechanism is prolonged.
[0063] In addition, the above-mentioned embodiment utilizes the mechanical sealing mechanism itself to increase the blades, and the overall structure is simple and compact, the size of the used space is low, and the application range is wide.
[0064] The above-mentioned embodiment is only a preferred embodiment of the utility model, and does not limit the patent protection range of the utility model, and equivalent unit transformations, direct or indirect application in other related technical fields, are all included in the protection range of the utility model.
Claims
1. A mechanical seal mechanism for mounting between a main shaft and a mounting body to form a seal, characterized by, The mechanical seal mechanism comprises: a static ring assembly fixedly installed on the mounting body for the main shaft to pass through and having a static ring; a dynamic ring assembly sleeved on the main shaft and located on one side of the static ring assembly and capable of moving relative to the static ring assembly; wherein the dynamic ring assembly has: a dynamic ring arranged close to the static ring; a transmission component installed on the main shaft and rotating with the main shaft; and a resilient component arranged between the dynamic ring and the transmission component, one end of which abuts against the transmission component and the other end of which pushes the dynamic ring towards the side where the static ring is located so that the dynamic ring abuts against the static ring to achieve sealing; the transmission component comprises a transmission body and at least two axial flow vanes arranged on the outer periphery of the transmission body.
2. The mechanical seal mechanism according to claim 1, wherein: wherein a limiting pin for limiting the transmission body on the main shaft is installed, an insertion hole is formed on the main shaft, a limiting groove is formed on the inner side of the bottom of the transmission body, one end of the limiting pin is inserted into the insertion hole and the other end of the limiting pin is inserted into the limiting groove.
3. The mechanical seal mechanism according to claim 1 or 2, wherein: wherein, the side of the transmission body facing the static ring is inwardly recessed to form an installation groove, the resilient component and the dynamic ring are sequentially stacked in the installation groove, and a through hole is formed on the peripheral surface of the transmission body to communicate the outside with the installation groove.
4. The mechanical seal mechanism according to claim 3, wherein: wherein the resilient component is a spring arranged between the dynamic ring and the transmission body, the dynamic ring can abut against the static ring under the pushing of the spring, the dynamic ring assembly further has a push ring located between the side of the dynamic ring away from the static ring and the spring, and the push ring abuts against the end surface of the dynamic ring under the action of the spring.
5. The mechanical seal mechanism according to claim 3, wherein: wherein the resilient component is a wave spring or a butterfly spring, and one end of the wave spring or the butterfly spring facing the dynamic ring is formed with a flat surface for abutting against the end surface of the dynamic ring.
6. The mechanical seal mechanism according to any one of claims 1-5, wherein: wherein the static ring assembly further has a sealing sleeve for sealing between the static ring and the mounting body, the static ring is clearance-fitted on the outer periphery of the main shaft, and the sealing sleeve is sleeved on the outer periphery of the static ring; the dynamic ring assembly further has a sealing ring for sealing between the dynamic ring and the main shaft, the side of the dynamic ring facing the resilient component is inwardly recessed to form an annular groove, and the sealing ring is arranged in the annular groove; the side of the dynamic ring facing the static ring is outwardly protruded to form an abutting boss for abutting against the end surface of the static ring, an inner wall of the transmission body is formed with a positioning portion, and the outer periphery of the dynamic ring is formed with a positioning matching portion matched with the positioning portion.
7. Cooling sealing device, characterized in that The mechanical seal mechanism comprises: a mounting body and a main shaft, a cooling partition arranged on the outer side of the mounting body and having a through hole for the main shaft to pass through; a mechanical seal mechanism as claimed in any one of claims 1-6. The axial flow blade is at least partially located in the through hole, and a cooling flow channel for the cooling medium to flow through is arranged between the mounting body, the main shaft and the cooling partition.
8. The cooling sealing device according to claim 7, characterized in that, wherein, The mounting body is a motor shell or a motor end cover, the main shaft is a motor output shaft, and the cooling partition has a body portion extending along the output shaft in an axial direction to surround the motor shell. The cooling flow channel has an outer flow channel located outside the cooling partition and an inner flow channel located between the cooling partition and the motor shell, and the cooling medium in the outer flow channel is pumped by the axial flow blade to flow from the through hole to the inner flow channel.
9. The cooling seal apparatus of claim 8, wherein, Further comprising a shell located outside the cooling partition and forming the outer flow channel with the cooling partition, and the cooling flow channel further has a return passage between the inner flow channel and the outer flow channel, so that the cooling medium can circulate in the cooling flow channel.
10. An apparatus, comprising: At least comprising: A cooling sealing device, The cooling sealing device is the cooling sealing device according to any one of claims 7-9.