CN213332383U - Mechanical air blowing sealing structure for shaft movement - Google Patents
Mechanical air blowing sealing structure for shaft movement Download PDFInfo
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- CN213332383U CN213332383U CN202021118627.4U CN202021118627U CN213332383U CN 213332383 U CN213332383 U CN 213332383U CN 202021118627 U CN202021118627 U CN 202021118627U CN 213332383 U CN213332383 U CN 213332383U
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Abstract
The utility model provides a mechanical air-blowing sealing structure for shaft movement, which is a three-layer sealing structure with a powder blocking disc, an air-blowing labyrinth seal and an oil seal structure sequentially arranged on a transmission shaft from the inside to the outside of a tank body; compressed air is introduced into the air chamber, the annular tooth gaps and the inter-tooth gaps through the air inlet joint and the vent holes, pressure energy of the air is converted into kinetic energy when the air passes through the gaps of the zigzag labyrinth, stable vortex is formed, dust entering the gaps of the powder blocking disc is blown out, and the sealing effect is better. Multiple mechanical type gas blowing seal structure mutually supports, can prevent that the dust from leaking and impurity from getting into the transmission position, can reduce the friction that the dust produced through gas blowing seal structure, reduces the wearing and tearing to seal structure to and prevent that abrasion piece and lubricating oil in the mechanical transmission part from getting into the blending tank, avoid appearing polluting the powder and arousing serious quality problems.
Description
Technical Field
The utility model relates to a powder stirring mixing apparatus field can be applied to the occasion that powder in fields such as battery material, coating, food, medicine, cosmetics mixes, cladding, drying, granulation etc. involve the dust, in particular to a mechanical type seal structure of blowing that is used for axle motion.
Background
The powder mixer for preparing the powder material is equipment for fully mixing and dispersing the powder, and the powder is stirred at a high speed in the equipment, so that the requirement on the sealing property of the transmission shaft part is high in order to prevent powder particles from being brought into the transmission shaft. The sealing structure of the powder mixing equipment can prevent the invasion of external impurities, and can also prevent the leakage of sealed powder particles from a transmission part, thereby avoiding the pollution to the environment and ensuring the operation safety and stability of the equipment.
At present, the sealing form of a transmission shaft of a powder mixer in the prior art mainly adopts contact type sealing, such as an O-shaped ring, packing sealing, framework oil sealing and the like. The contact seal is characterized by economy, simple structure and easy processing and installation. However, the main drawbacks of contact sealing are: when the equipment runs, the air pressure in the tank body can fluctuate due to the flow field turbulence generated in the powder mixing tank, and the sealing effect of the contact type seal can be impacted due to the change of the air pressure. For fine powder, especially powder with high hardness, once entering the gap between the shafts, abrasion of the shafts and the bearings is easily caused, the service life of the contact type seal is shortened, the stability of the equipment is greatly reduced, and the maintenance cost is increased. Most importantly, the sealing performance is poor due to the abrasion of the transmission assembly, and external pollutants easily enter the powder mixing tank to cause material scrapping; the powder inside the device is easy to leak outside the device, and the environment is polluted.
Under the conditions of high temperature, high pressure, high rotating speed and large size, the labyrinth seal can better resist leakage in order to improve the sealing effect. The labyrinth seal (labyrinth seal) is formed by arranging a plurality of annular seal teeth which are sequentially arranged around a rotating shaft, a series of closure gaps and expansion cavities are formed between the teeth, and a sealed medium generates a throttling effect when passing through the gaps of the zigzag labyrinth, so that the aim of leakage resistance is fulfilled. The throttling effect, also known as joule-thomson effect, is a phenomenon in which the temperature of a gas changes with the pressure as the gas passes through an adiabatic throttling expansion process. Most practical gases at room temperature, such as nitrogen, oxygen, air, etc., decrease in temperature during throttling expansion, while gases such as hydrogen, helium, etc., increase in temperature under the same conditions. If the temperature is unchanged before and after throttling, the Joule-Thomson effect is called as zero effect for short; the temperature is reduced after throttling, which is called positive effect or throttling refrigeration effect; the temperature rise after throttling is called negative effect.
In summary, the prior art has the problems of poor sealing effect, easy abrasion of the sealing structure, increased power loss due to the contact between the inner shaft and the outer shaft, easy abrasion of the shaft and the bearing, great loss of equipment stability, increased maintenance cost and the like.
Therefore, in the field of powder stirring and mixing equipment, a mechanical air blowing sealing structure for shaft motion, which has better sealing effect, is not easy to wear and has lower power loss, is urgently needed.
Disclosure of Invention
In view of this, the present invention provides a mechanical air-blowing sealing structure for shaft motion, which has better sealing effect, less abrasion of the sealing structure and lower power loss. In order to achieve the above purpose, the utility model adopts the following technical scheme:
in a first aspect, a mechanical blow seal structure for shaft movement is provided, comprising: the high-speed transmission shaft, the high-speed transmission bearing, the high-speed shaft bushing, the air inlet joint, the rotating straight tooth labyrinth oil seal seat, the high-speed powder blocking disc and the oil seal; a high-speed powder blocking disc, a high-speed shaft bushing and a high-speed transmission bearing which are matched with the high-speed transmission shaft are sequentially arranged downwards along the axial direction; the rotating straight tooth labyrinth oil seal seat is arranged on the outer sides of the high-speed powder blocking disc and the high-speed shaft bushing; a plurality of air inlet joints are annularly and uniformly distributed on the rotating straight tooth labyrinth oil seal seat, and oil seals are arranged below the air inlet joints and above the high-speed transmission bearing; an air chamber is arranged among the high-speed powder blocking disc, the high-speed shaft bushing, the rotating straight tooth labyrinth oil seal seat and the oil seal; the high-speed powder blocking disc and the rotating straight tooth labyrinth oil seal seat form uniformly staggered annular tooth gaps and tooth space cavities; pressurized gas is introduced into the gas inlet joint, and the gas enters the gas chamber, the annular tooth gap and the cavity between the teeth to form a mechanical blowing labyrinth seal, so that dust between the rotating straight tooth labyrinth oil seal seat and the high-speed powder blocking disc is blown out.
In a second aspect, a mechanical blow seal structure for shaft movement is provided, comprising: the high-speed transmission shaft, the low-speed transmission shaft, the high-speed transmission bearing, the low-speed transmission bearing, the high-speed shaft bushing, the low-speed shaft bushing, the air inlet joint, the air inlet straight tooth labyrinth oil seal seat, the rotating straight tooth labyrinth oil seal seat, the high-speed powder blocking disc, the low-speed powder blocking disc and the oil seal; a high-speed powder blocking disc, a high-speed shaft bushing and a high-speed transmission bearing which are matched with the high-speed transmission shaft are sequentially arranged downwards along the axial direction; the rotating straight tooth labyrinth oil seal seat is arranged on the outer sides of the high-speed powder blocking disc and the high-speed shaft bushing; the low-speed transmission shaft is arranged at the outer edge of the high-speed transmission bearing and the lower edge of the rotating straight tooth labyrinth oil seal seat; the low-speed transmission bearing is matched with the low-speed transmission shaft; a low-speed powder blocking disc and a low-speed shaft bushing which are matched with the rotating straight tooth labyrinth oil seal seat are sequentially arranged downwards along the axial direction, and a plurality of vent holes are formed in the low-speed shaft bushing and the rotating straight tooth labyrinth oil seal seat; the air inlet straight tooth labyrinth oil seal seat is arranged on the outer sides of the low-speed powder blocking disc and the low-speed shaft bushing; a plurality of air inlet joints are annularly and uniformly distributed on the air inlet straight tooth labyrinth oil seal seat, and oil seals are arranged below the air inlet joints, above the high-speed transmission bearing, above the low-speed transmission bearing, between the high-speed shaft bushing and the rotating straight tooth labyrinth oil seal seat; an air chamber is arranged among the high-speed powder blocking disc, the high-speed shaft bushing, the rotating straight tooth labyrinth oil seal seat and the oil seal; the high-speed powder blocking disc and the rotating straight tooth labyrinth oil seal seat form uniformly staggered annular tooth gaps and tooth space cavities; an air chamber is arranged among the low-speed powder blocking disc, the low-speed shaft bushing, the air inlet straight tooth labyrinth oil seal seat and the oil seal; the low-speed powder blocking disc and the air inlet straight tooth labyrinth oil seal seat form uniformly staggered annular tooth gaps and tooth space cavities; pressurized gas enters the gas chamber, the annular tooth gaps and the cavity between the teeth through the gas inlet joint and the vent hole to form mechanical blowing labyrinth seal, and dust between the gas inlet straight tooth labyrinth oil seal seat and the low-speed powder blocking disc and between the rotating straight tooth labyrinth oil seal seat and the high-speed powder blocking disc is blown out.
The second aspect is actually an improvement of the first aspect in a dual drive configuration. The dual drive structure is in the utility model discloses well interior outer axle contactless has reduced the power loss that mutual friction caused. The utility model is characterized in that a three-layer sealing structure of a powder blocking disc, a blowing labyrinth seal and an oil seal structure is arranged on a transmission shaft from the inside to the outside of a tank body in sequence; compressed air is introduced into the air chamber, the annular tooth gaps and the tooth gaps through the air inlet joint and the vent holes, so that air pressure sealing is realized, and dust entering the gaps between the powder blocking disc and the straight tooth labyrinth oil seal seat is blown out. The multiple mechanical blowing sealing structures are matched with each other, dust can be prevented from leaking and impurities can be prevented from entering a transmission part, friction generated by dust can be reduced through the blowing sealing structures, abrasion to the sealing structures is reduced, and abrasion fragments and lubricating oil in mechanical transmission parts are prevented from entering the mixing tank.
One possible embodiment of the first aspect is that 2 to 4 air inlet joints are annularly and uniformly distributed on the rotating straight tooth labyrinth oil seal seat.
One possible embodiment of the second aspect is that 2 to 4 air inlet joints are annularly and uniformly distributed on the air inlet straight tooth labyrinth oil seal seat.
In another possible embodiment, in combination with the possible embodiments of the first aspect and the second aspect, the gap between the air inlet straight tooth labyrinth oil seal seat and the tooth between the low-speed powder baffle disc, and the gap between the rotating straight tooth labyrinth oil seal seat and the tooth between the high-speed powder baffle disc are controlled to be 0.5mm (millimeters) to 2mm (millimeters).
In a possible embodiment, the circumferential surfaces of the low-speed shaft bushing and the high-speed shaft bushing which are in contact with the oil seal are hardened, so that the transmission bearing can be prevented from being abraded due to the introduction of foreign matters to the maximum extent.
In a possible embodiment, the hardening treatment comprises a coating or plating or a heat treatment.
In one possible embodiment, the oil seal is a single-lip oil seal or a double-lip oil seal or a medium separation type oil seal.
In one possible embodiment, the ventilation holes are in the form of round holes or kidney-shaped holes or square holes.
The utility model discloses a main beneficial effect: through the mechanical air blowing sealing structure, the sealing effect is better, the sealing structure is not easy to wear, and on one hand, dust is prevented from entering a mechanical transmission part; on the other hand, the abrasion debris and the lubricating oil in the mechanical transmission part are prevented from entering the mixing tank, so that the powder is polluted.
Drawings
FIG. 1 is a schematic view of a prior art seal configuration;
fig. 2 is a schematic partial cross-sectional view of the present invention applied to an underlying dual drive structure.
Description of the main elements
Detailed Description
In order to make the objects, principles, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration and are not intended to limit the invention, as described in this summary of the invention.
It should be particularly noted that, according to the connection or position relationship that can be determined according to the text or technical content of the specification, a part of the omitted or not-shown position change diagram is omitted for the simplicity of drawing, the omitted or not-shown position change diagram is not explicitly described in the specification, and cannot be considered to be omitted, and in the interest of brevity of description, the detailed description is not repeated one by one, and the description is unified herein.
The sealing method for isolating powder of the powder mixing equipment in the prior art adopts a simple contact type sealing form, as shown in a schematic diagram of a sealing structure in the prior art shown in figure 1, and is implemented specifically by installing the contact type sealing structure at the joint of a mechanical transmission part and a powder mixing tank, so that the powder is prevented from permeating into the mechanical transmission part, and mechanical abrasion debris and lubricating oil in the mechanical transmission part are prevented from entering the powder mixing tank. The technical scheme has the characteristics of economy, simple structure and easy processing and installation, but the main defect of the technical scheme is that when equipment runs, the air pressure in the tank body is fluctuated due to flow field turbulence generated in the powder mixing tank, and the change of the air pressure can impact the sealing effect of the contact type seal. Specifically, when the air pressure in the tank is higher than the external air pressure, dust raised in the mixing tank permeates into mechanical transmission parts along with the gas in the tank, and the contact seal is damaged, so that the abrasion of the mechanical transmission parts (such as a transmission shaft and a transmission bearing) is accelerated, and even the mechanical clamping is directly caused, and the parts are damaged; on the contrary, when the air pressure in the tank is smaller than the external air pressure, the abrasion fragments and the lubricating oil in the mechanical transmission part are also pressed into the tank by the external atmospheric pressure, so that the powder in the mixing tank is polluted, and the serious quality problem is caused.
The utility model provides a mechanical type seal structure of blowing for axle motion, figure 2 is its local section schematic diagram that is applied to the structural style of underneath type dual drive. The dual-drive structure comprises a low-speed driving motor and a high-speed driving motor, mechanical components of the dual-drive structure mainly comprise a high-speed transmission shaft 101, a low-speed transmission shaft 201, a high-speed transmission bearing 102, a low-speed transmission bearing 202, a high-speed stirring blade 103, a low-speed stirring blade 203, a high-speed shaft bushing 105 and a low-speed shaft bushing 205, and the stirring direction of the low-speed stirring blade 203 is opposite to that of the high-speed stirring blade 103, so that various powder bodies can be uniformly mixed. The utility model discloses a mechanical type seal structure of blowing for axle motion includes: a high-speed powder blocking disc 104, a high-speed shaft bushing 105 and a high-speed transmission shaft 102 which are matched with the high-speed transmission shaft 101 are sequentially arranged downwards along the axial direction; the rotating straight tooth labyrinth oil seal seat 303 is arranged on the outer sides of the high-speed powder blocking disc 104 and the high-speed shaft bushing 105; the low-speed transmission shaft 201 is arranged at the outer edge of the high-speed transmission shaft 102 and the lower edge of the rotating straight tooth labyrinth oil seal seat 303; the low-speed transmission bearing 202 is matched with the low-speed transmission shaft 201; a low-speed powder blocking disc 204 and a low-speed shaft bushing 205 which are matched with the rotating straight tooth labyrinth oil seal seat 303 are sequentially arranged downwards along the axial direction, and a plurality of vent holes are formed in the low-speed shaft bushing 205 and the rotating straight tooth labyrinth oil seal seat 303; the air inlet straight tooth labyrinth oil seal seat 302 is arranged on the outer sides of the low-speed powder baffle disc 204 and the low-speed shaft bushing 205; a plurality of air inlet joints 301 are annularly and uniformly distributed on an air inlet straight tooth labyrinth oil seal seat 302, and oil seals 304 are respectively arranged below the air inlet joints 301, above the high-speed transmission shaft 102, above the low-speed transmission bearing 202, between the high-speed shaft bushing 105 and the rotating straight tooth labyrinth oil seal seat 303; an air chamber 305 is arranged among the high-speed powder blocking disc 104, the high-speed shaft bushing 105, the rotating straight tooth labyrinth oil seal seat 303 and the oil seal 304; the high-speed powder blocking disc 104 and the rotating straight tooth labyrinth oil seal seat 303 form uniformly staggered annular tooth gaps and tooth space cavities; an air chamber 305 is arranged among the low-speed powder baffle disc 204, the low-speed shaft bushing 205, the air inlet straight tooth labyrinth oil seal seat 302 and the oil seal 304; the low-speed powder baffle disc 204 and the air inlet straight tooth labyrinth oil seal seat 302 form uniformly staggered annular tooth gaps and tooth space cavities; pressurized gas enters the gas chamber 305, the annular tooth gaps and the cavity between the teeth through the gas inlet joint 301 and the vent hole to form a mechanical blowing labyrinth seal, and dust between the gas inlet straight tooth labyrinth oil seal seat 302 and the low-speed powder baffle disc 204 and between the rotating straight tooth labyrinth oil seal seat 303 and the high-speed powder baffle disc 104 is blown out. Further, the gap between the air inlet straight tooth labyrinth oil seal seat 302 and the tooth between the low-speed powder baffle disc 204 and the gap between the rotating straight tooth labyrinth oil seal seat 303 and the tooth between the high-speed powder baffle disc 104 are controlled to be 0.5mm (millimeter) to 2mm (millimeter). Further, 2-4 air inlet joints 301 are annularly and uniformly distributed on the air inlet straight tooth labyrinth oil seal seat 302. Specifically, fig. 2 includes two blowing channels, a first blowing channel: the air is introduced into the air inlet joint 301, and passes through an annular tooth gap and a tooth gap formed by matching the air chamber 305, the low-speed powder baffle disc 204 and the air inlet straight tooth labyrinth oil seal seat 302, so that the dust entering the gap between the low-speed powder baffle disc 204 and the air inlet straight tooth labyrinth oil seal seat 302 is blown out. A second air blowing channel: the air is introduced into the air inlet joint 301, and the dust entering the gap between the high-speed powder blocking disc 104 and the rotating straight tooth labyrinth oil seal seat 303 is blown out through an annular tooth gap and a tooth gap formed by the cooperation of the vent hole, the air chamber 305, the high-speed powder blocking disc 104 and the rotating straight tooth labyrinth oil seal seat 303.
Under the conditions of high temperature, high pressure, high rotating speed and large size, the labyrinth seal can better resist leakage in order not to influence the material components. The transmission shaft is sequentially provided with a three-layer sealing structure of a powder blocking disc, an air blowing labyrinth seal and an oil seal structure from the inside to the outside of the tank body; the leading-in annular equipartition of compressed air is at air inlet joint 301 on air inlet straight tooth labyrinth oil seal seat 302, the inside air vent that sets up of rotatory straight tooth labyrinth oil seal seat 303 and low-speed shaft bushing 205, air chamber 305, straight tooth labyrinth oil seal seat and the even crisscross annular tooth gap and the interdental cavity that keep off powder dish cooperation and form, gas pressure energy converts kinetic energy into when the clearance through tortuous labyrinth, form stable swirl, will get into and keep off the dust of powder dish gap department and blow off, avoid appearing the blind spot, and can effectively reduce "ventilation effect", sealed effect is better. In the ideal labyrinth, it is assumed that the kinetic energy of the air flow through the slots is entirely converted into thermal energy in the expansion chamber, i.e. the asymptotic velocity to the next slot is assumed to be equal to zero, but this only holds true when the expansion chamber is particularly wide and long. In a general straight-through labyrinth, since the gas flow passing through the slit can only diffuse to one side, the kinetic energy can not be fully converted into the energy of the heat energy in the expansion chamber, and a part of the gas velocity close to the smooth wall side is not reduced or only slightly reduced and directly passes through each tooth crest to flow to the low-pressure side, and the glancing phenomenon is called as 'ventilation effect'. When the 'air permeability effect' occurs in the labyrinth, dead zones can occur in tooth gaps and tooth space cavities, dust in the dead zones cannot be blown out by air, and the dust can enter mechanical transmission parts, so that equipment failure is caused. The ideal labyrinth seal can promote the throttling effect and inhibit the ventilation effect, and the pressure energy of the gas passing through the labyrinth is converted into kinetic energy to form stable vortex to blow out the dust entering the gap of the powder blocking disc. The labyrinth seal is a non-contact seal, and the required medium is gas, so that the material components are not influenced. The utility model discloses utilize multiple mechanical type to blow seal structure and mutually support, can prevent that the dust from leaking and impurity gets into the transmission position, can reduce the possibility that the dust gathers in seal structure through the seal structure of blowing, reduce the wearing and tearing to oil blanket 304 to and prevent that abrasion piece and lubricating oil among the mechanical transmission part from getting into the blending tank, avoid appearing polluting the powder and arousing serious quality problems.
The utility model discloses a chinese patent application number is 201721366414.1 (hereinafter called "141 patent"), a powder mechanical type airtight structure is disclosed, the main technical problem who solves of this utility model is that the sealed effect of powder mixer rotation axis is poor, produce wearing and tearing easily, it is mainly sealed through packing, elasticity sealing ring, dustproof sealing ring, lip type sealing washer four-layer seal structure, and atmoseal seat middle part is equipped with the air flue, at dustproof sealing ring, atmoseal seat, the elasticity sealing ring, form the air chamber between the rotating-ring seal cover, compressed air gets into the air chamber through the air flue and blows to the gap, form atmospheric pressure and seal. Although the patent No. 141 also utilizes the principle of labyrinth seal, the labyrinth passage is not wide and long, and the kinetic energy can not be fully converted into heat energy in the expansion chamber, and a part of gas speed close to the smooth wall side is not reduced or only slightly reduced, and the gas directly crosses each tooth top to flow to the low pressure side, so that a dead zone appears at the tooth top, the pressurized gas can not blow out the dust in the gap, the seal structure is easy to wear, the seal structure needs to be frequently replaced and maintained, otherwise the dust easily enters the mechanical transmission part to cause poor stability of the equipment, and even cause equipment failure.
In other embodiments, the circumferential surfaces of the low speed shaft bushing 205 and the high speed shaft bushing 105 that contact the oil seal 304 are hardened to maximize the ability of the drive bearing to be protected from erosion due to the introduction of foreign matter. The hardening treatment includes, but is not limited to, coating or plating or heat treatment. In addition, the oil seal 304 contains a substance such as graphite which can make the oil seal self-lubricating, so that the friction between the oil seal 304 and the mechanical transmission part can be reduced, and the situation that abrasion debris in the mechanical transmission part and lubricating oil enter the mixing tank due to the abrasion of the oil seal 304 is avoided. The oil seal 304 is generally of a common single-lip structure or double-lip structure, and a medium separation type oil seal can be selected according to working conditions such as high vacuum degree and high rotating speed. The sizes of the annular vent holes of the rotating straight tooth labyrinth oil seal seat 303 and the low-speed shaft bushing 205 are determined according to the rotating speed, the intake pressure and the flow rate of the device, and the structural form of the vent holes can be round holes or kidney-shaped holes or square holes, but is not limited to these modes.
The present invention provides a labyrinth seal structure with lower double drives, which is only a preferred embodiment of the present invention, and is not limited to the present invention, any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention, such as a mechanical blowing seal structure applied to lower single drive, upper single drive, and upper double drive, which also falls within the scope of protection of the right.
It should be noted that, in the foregoing embodiment, each included module is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, the specific names of the functional units are also only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present invention.
Claims (8)
1. A mechanical blow seal structure for shaft movement, comprising: the high-speed transmission shaft, the high-speed transmission bearing, the high-speed shaft bushing, the air inlet joint, the rotating straight tooth labyrinth oil seal seat, the high-speed powder blocking disc and the oil seal;
a high-speed powder blocking disc, a high-speed shaft bushing and a high-speed transmission bearing which are matched with the high-speed transmission shaft are sequentially arranged downwards along the axial direction; the rotating straight tooth labyrinth oil seal seat is arranged on the outer sides of the high-speed powder blocking disc and the high-speed shaft bushing;
a plurality of air inlet joints are annularly and uniformly distributed on the rotating straight tooth labyrinth oil seal seat, and oil seals are arranged below the air inlet joints and above the high-speed transmission bearing;
an air chamber is arranged among the high-speed powder blocking disc, the high-speed shaft bushing, the rotating straight tooth labyrinth oil seal seat and the oil seal; the high-speed powder blocking disc and the rotating straight tooth labyrinth oil seal seat form uniformly staggered annular tooth gaps and tooth space cavities;
pressurized gas is introduced into the gas inlet joint, and the gas enters the gas chamber, the annular tooth gap and the cavity between the teeth to form a mechanical blowing labyrinth seal, so that dust between the rotating straight tooth labyrinth oil seal seat and the high-speed powder blocking disc is blown out.
2. The mechanical blowing seal structure of claim 1, wherein 2 to 4 air inlet joints are annularly and uniformly distributed on the rotating straight tooth labyrinth oil seal seat.
3. A mechanical blow seal structure for shaft movement, comprising: the high-speed transmission shaft, the low-speed transmission shaft, the high-speed transmission bearing, the low-speed transmission bearing, the high-speed shaft bushing, the low-speed shaft bushing, the air inlet joint, the air inlet straight tooth labyrinth oil seal seat, the rotating straight tooth labyrinth oil seal seat, the high-speed powder blocking disc, the low-speed powder blocking disc and the oil seal;
a high-speed powder blocking disc, a high-speed shaft bushing and a high-speed transmission bearing which are matched with the high-speed transmission shaft are sequentially arranged downwards along the axial direction; the rotating straight tooth labyrinth oil seal seat is arranged on the outer sides of the high-speed powder blocking disc and the high-speed shaft bushing;
the low-speed transmission shaft is arranged at the outer edge of the high-speed transmission bearing and the lower edge of the rotating straight tooth labyrinth oil seal seat; the low-speed transmission bearing is matched with the low-speed transmission shaft; a low-speed powder blocking disc and a low-speed shaft bushing which are matched with the rotating straight tooth labyrinth oil seal seat are sequentially arranged downwards along the axial direction, and a plurality of vent holes are formed in the low-speed shaft bushing and the rotating straight tooth labyrinth oil seal seat; the air inlet straight tooth labyrinth oil seal seat is arranged on the outer sides of the low-speed powder blocking disc and the low-speed shaft bushing;
a plurality of air inlet joints are annularly and uniformly distributed on the air inlet straight tooth labyrinth oil seal seat, and oil seals are arranged below the air inlet joints, above the high-speed transmission bearing, above the low-speed transmission bearing, between the high-speed shaft bushing and the rotating straight tooth labyrinth oil seal seat;
an air chamber is arranged among the high-speed powder blocking disc, the high-speed shaft bushing, the rotating straight tooth labyrinth oil seal seat and the oil seal; the high-speed powder blocking disc and the rotating straight tooth labyrinth oil seal seat form uniformly staggered annular tooth gaps and tooth space cavities;
an air chamber is arranged among the low-speed powder blocking disc, the low-speed shaft bushing, the air inlet straight tooth labyrinth oil seal seat and the oil seal; the low-speed powder blocking disc and the air inlet straight tooth labyrinth oil seal seat form uniformly staggered annular tooth gaps and tooth space cavities;
pressurized gas enters the gas chamber, the annular tooth gaps and the cavity between the teeth through the gas inlet joint and the vent hole to form mechanical blowing labyrinth seal, and dust between the gas inlet straight tooth labyrinth oil seal seat and the low-speed powder blocking disc and between the rotating straight tooth labyrinth oil seal seat and the high-speed powder blocking disc is blown out.
4. The mechanical blowing seal structure of claim 3, wherein 2 to 4 air inlet joints are annularly and uniformly distributed on the air inlet straight tooth labyrinth oil seal seat.
5. The mechanical air-blowing sealing structure as claimed in claim 4, wherein the gap between the teeth of the rotating straight tooth labyrinth oil seal seat and the high-speed powder baffle disc, and the gap between the teeth of the air-inlet straight tooth labyrinth oil seal seat and the low-speed powder baffle disc are controlled to be 0.5mm (mm) to 2mm (mm).
6. The mechanical air blowing seal structure according to claim 5, wherein the circumferential surfaces of the high speed shaft bushing and the low speed shaft bushing which are in contact with the oil seal are hardened.
7. The mechanical air blowing seal structure of claim 6, wherein the oil seal is a single-lip oil seal or a double-lip oil seal or a medium separation type oil seal.
8. The mechanical blow seal structure of claim 7, wherein the vent holes are configured as round holes or square holes or kidney-shaped holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021118627.4U CN213332383U (en) | 2020-06-16 | 2020-06-16 | Mechanical air blowing sealing structure for shaft movement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021118627.4U CN213332383U (en) | 2020-06-16 | 2020-06-16 | Mechanical air blowing sealing structure for shaft movement |
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| CN213332383U true CN213332383U (en) | 2021-06-01 |
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| CN202021118627.4U Active CN213332383U (en) | 2020-06-16 | 2020-06-16 | Mechanical air blowing sealing structure for shaft movement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135586A (en) * | 2021-10-28 | 2022-03-04 | 四川中烟工业有限责任公司 | Novel oil seal seat |
| CN116726751A (en) * | 2023-06-15 | 2023-09-12 | 深圳市尚水智能股份有限公司 | Mixing device and cladding machine |
-
2020
- 2020-06-16 CN CN202021118627.4U patent/CN213332383U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135586A (en) * | 2021-10-28 | 2022-03-04 | 四川中烟工业有限责任公司 | Novel oil seal seat |
| CN114135586B (en) * | 2021-10-28 | 2023-11-10 | 四川中烟工业有限责任公司 | Novel oil seal seat |
| CN116726751A (en) * | 2023-06-15 | 2023-09-12 | 深圳市尚水智能股份有限公司 | Mixing device and cladding machine |
| CN116726751B (en) * | 2023-06-15 | 2024-04-09 | 深圳市尚水智能股份有限公司 | Mixing device and cladding machine |
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