CN108361225B - Vortex type air pump with high mechanical sealing structure - Google Patents
Vortex type air pump with high mechanical sealing structure Download PDFInfo
- Publication number
- CN108361225B CN108361225B CN201711404255.4A CN201711404255A CN108361225B CN 108361225 B CN108361225 B CN 108361225B CN 201711404255 A CN201711404255 A CN 201711404255A CN 108361225 B CN108361225 B CN 108361225B
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- shell
- liquid seal
- fixing
- sealing
- liquid
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
Abstract
The invention discloses a high-mechanical structure vortex type air pump which comprises a shell, an impeller arranged in the shell and a driving piece used for driving the impeller to rotate, wherein the impeller is arranged in the shell; the shell comprises a first shell and a second shell matched with the first shell, and a liquid seal part is arranged at the joint of the first shell and the second shell. The liquid seal component is arranged to realize liquid seal on the shell gap, so that the safety is high, the sealing effect is good, gas cannot leak, and the efficiency of compressing the gas by the pump body is high; the liquid seal component can also be convenient for directly finding air leakage, the position of the air leakage and the amount of the air leakage, and is convenient for adjusting the sealing property of the joint of the first shell and the second shell.
Description
Technical Field
The invention belongs to the technical field of vortex type air pumps, and particularly relates to a vortex type air pump with a high mechanical sealing structure.
Background
The existing vortex type air pump is usually connected through two shells, a cavity is formed inside the shells after the connection is finished, but because the two shells are metal shells, the sealing performance between the metals is poor after the connection is finished, and the complete sealing is difficult to achieve for gas, so that the efficiency of the air pump for compressing the gas is low; meanwhile, the vortex type air pump needs to compress air, the compressed air has high pressure, so that the air is easier to leak from the joint between the two shells, and the air leakage is difficult to find because the air leakage is usually small.
Disclosure of Invention
The invention provides a vortex type air pump with a high mechanical sealing structure, which can realize sealing through liquid sealing in order to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a high mechanical structure vortex type air pump comprises a shell, an impeller arranged in the shell and a driving piece used for driving the impeller to rotate; the shell comprises a first shell and a second shell matched with the first shell, and a liquid seal part is arranged at the joint of the first shell and the second shell. According to the invention, the first shell and the second shell are arranged, so that the impeller is conveniently arranged in the shell, and the installation is convenient; the liquid seal component is arranged at the joint of the first shell and the second shell, so that liquid seal is realized for a gap at the joint of the first shell and the second shell, and the density of liquid is far greater than that of gas, so that the liquid for sealing cannot permeate into the shell from the joint between the first shell and the second shell, and the safety is high; by adopting a liquid sealing mode, the sealing effect on the joint of the two shells is good, gas cannot leak, and the efficiency of compressing the gas by the pump body is high; the arrangement of the liquid seal part can also facilitate the judgment of fine air leakage and the position of air leakage at the joint between the first shell and the second shell, and when the air in the shell leaks outwards, if the liquid seal part is completely filled with liquid, the position of air leakage and the amount of air leakage can be judged according to the position and the amount of generated air bubbles; if the liquid seal part is not completely filled with liquid, the approximate position of gas leakage and the gas leakage amount can be judged according to the movement direction and the movement speed of the liquid; through the liquid sealing mode, the multifunctional liquid seal realizes multiple purposes and is convenient to use.
Furthermore, the liquid seal component comprises a first liquid seal piece, a second liquid seal piece and a liquid seal cavity arranged between the first liquid seal piece and the second liquid seal piece, and sealing liquid is arranged in the liquid seal cavity; the first liquid seal piece and the second liquid seal piece are arranged, the two liquid seal pieces are connected with each other to form a liquid seal cavity, the connection of the first shell and the second shell is arranged in the liquid seal cavity through the liquid seal cavity formed by the arrangement mode, and then the sealing liquid can be directly contacted with the connection part of the first shell and the second shell, so that complete liquid seal is realized, and the shell cannot leak gas; the two liquid sealing pieces are connected, so that the liquid sealing device is convenient to install, and can be used for replacing and maintaining the liquid sealing parts conveniently, and the maintenance cost is reduced.
Furthermore, a plurality of fixing parts are arranged on the first liquid seal piece, and fixing grooves matched with the fixing parts are formed in the first shell; the fixing part is arranged to be clamped into the fixing groove, so that the first liquid seal piece can be positioned, the first liquid seal piece is conveniently installed on an originally designed position, and a subsequent second liquid seal piece is conveniently and accurately butted with the first liquid seal piece; similarly, the fixing part and the fixing groove can also ensure that the first liquid seal piece slides relative to the first shell; the fixing part is clamped in the fixing groove, the contact area of the first liquid seal piece and the first shell is increased, and the sealing performance of the first liquid seal piece and the first shell is improved by increasing the contact area; meanwhile, the first liquid seal piece is directly fixed on the first shell, the first liquid seal piece does not need to be detached, and the connection of the first shell and the second shell cannot be influenced.
Furthermore, a clamping part is arranged on the second liquid seal part, and a clamping groove matched with the clamping part is arranged on the second shell; the clamping part is arranged to be clamped into the clamping groove, so that the second liquid seal part can be conveniently positioned on the second shell, the second liquid seal part is ensured to be in a designed position when being arranged on the second shell, and the second liquid seal part is ensured to be tightly connected with the first liquid seal part; similarly, the buckling part is clamped into the buckling groove, so that the situation that the buckling part is displaced when the buckling part is fixed can be avoided, and the second liquid seal piece is installed tightly.
Furthermore, a fixing piece is detachably connected to the second shell, and a limiting groove matched with the fixing piece is formed in the buckling part; the fixing piece is arranged to fix the buckling part, so that the buckling part cannot be separated from the buckling groove, and the buckling part and the buckling groove are tightly connected; the fixing piece is detachably arranged, so that the second liquid seal piece can be conveniently dismounted after the fixing piece is dismounted, the second shell can be conveniently dismounted from the first shell when the vortex air pump needs to be maintained, and the second liquid seal piece can be conveniently replaced; the fixing piece is used, so that the use of screws for fixing can be avoided, the fixing process is reduced, the time for fixing the second hydraulic seal piece is shortened, and the operation is convenient; set up the spacing groove, when making the mounting fixed buckle portion, the fixed position of mounting keeps unanimous, avoids the local skew of mounting and influences holistic leakproofness.
Furthermore, a plurality of first clamping parts are arranged on the inner wall of the limiting groove, and a second clamping part matched with the first clamping parts is arranged on the side wall of the fixing part; set up first clamping part and second clamping part, avoid the mounting to take place the horizontal slip in the spacing inslot, and first clamping part and second clamping part restrict each other, realize tentatively deciding to the mounting, during subsequent operation, only need with two tip fastening connection of mounting together can, need carry out hand etc. to the rail mounting when having removed from and connecting both ends, be convenient for ann the mounting.
Furthermore, a sealing part is arranged on the fixing part, and a plurality of convex ribs which are contacted with the bottom of the fixing groove are arranged on the sealing part; the sealing part is arranged, so that the fixing part can be better connected with the bottom of the fixing groove, and the sealing part can be deformed, so that when the fixing part is clamped into the fixing groove, no gap is formed at the bottom of the fixing groove; the plurality of convex ribs are arranged, and the contact area between the convex ribs and the bottom of the fixed groove is small, so that under the action of the pressure of the screw and the pressure, the pressure of the convex ribs on the bottom of the fixed groove is large, and the convex ribs and the fixed groove are in tight contact; the plurality of convex ribs are arranged, so that multilayer sealing is realized, and the sealing performance is further enhanced.
Furthermore, a bending part is arranged between the two fixing parts, a positioning part is arranged between the two fixing grooves, a sealing part is arranged between the bending part and the positioning part, the upper end of the sealing part is contacted with the lower end face of the bending part, and the lower end of the sealing part is contacted with the bottom of the positioning part; a bending part is arranged between the two fixing parts, so that when the fixing parts are connected, the fixing parts are clamped into the fixing grooves, the bending part is deformed to form downward elastic force, and the lower end surface of the bending part is tightly contacted with the sealing element; meanwhile, the bent part is arranged, so that the fixing part can be conveniently clamped into the fixing groove, and the non-resettable rigid deformation of the fixing part when the fixing part is clamped into the fixing groove is avoided; the arrangement of the sealing element realizes the resealing of the first liquid sealing element, and ensures the connection tightness of the first liquid sealing element and the second liquid sealing element; and the location part avoids the first seal from entering the displacement, and because of the displacement of the sealing element, a larger gap is easily left between the whole sealing element and the first shell, so that the sealing property is influenced, and the location part is arranged to ensure that the sealing element is tightly connected with the bending part.
Furthermore, a bent part adjacent to the buckling part is arranged on the second liquid seal part, and an arc-shaped convex part matched with the bent part is arranged in the buckling groove; the arc-shaped convex part is provided with an anti-falling convex part, and the bent part is provided with an anti-falling concave part matched with the anti-falling convex part; after the buckling part is clamped into the buckling groove, the bending part deforms, so that the arc-shaped convex part can be tightly pressed, the buckling part is conveniently clamped into the buckling groove, the other buckling part can realize sealing, and the sealing property between the buckling part and the arc-shaped convex part is enhanced; and set up anticreep convex part and anticreep concave part, then can realize local location when the kink warp, ensured that the kink takes place the in-process of deformation, displacement about the kink can not take place to be convenient for fix the second liquid seal spare.
In conclusion, the liquid seal component is arranged to realize liquid seal on the gap of the shell, so that the safety is high, the sealing effect is good, gas cannot leak, and the efficiency of the pump body for compressing the gas is high; the liquid seal component can also be convenient for directly finding air leakage, the position of the air leakage and the amount of the air leakage, and is convenient for adjusting the sealing property of the joint of the first shell and the second shell.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a in fig. 1.
Fig. 3 is an enlarged view of B in fig. 2.
Fig. 4 is an enlarged view of C in fig. 2.
Fig. 5 is an enlarged view of D in fig. 2.
Fig. 6 is an enlarged view of E in fig. 2.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1-6, a vortex type air pump with high mechanical sealing structure comprises a housing 1, a base, an impeller and a driving member 2; wherein the impeller is arranged in the shell and can rotate in the shell 1 and compress gas; the driving part 2 is a motor, and the impeller is an impeller of an existing vortex air pump in the market, so that the details are not repeated; the shell 1 comprises a first shell 11 and a second shell 12, the first shell 11 and the second shell 12 are both metal shells, and the second shell 12 is connected with the driving member 2; specifically, first casing and second casing on be equipped with the engaging lug respectively, the engaging lug on be equipped with the through-hole, consequently first casing 11 and second casing 12 when connecting, realize both being connected through penetrating the screw at the engaging lug.
Two sealing concave parts 19 are respectively arranged on the first shell 11 and the second shell 12; an airtight piece 18 is arranged between the first housing 11 and the second housing 12, the airtight piece 18 includes a sealing body 181 and two sealing protrusions 182, the sealing body 181 is a rubber ring, the number of the sealing protrusions 182 is four, specifically, two sealing protrusions are arranged on one side of the sealing body 181, the other two sealing protrusions are arranged on the other side of the sealing body 182, when the first housing 11 and the second housing 12 are connected, the sealing body 181 is located between the first housing 11 and the second housing 12, the left sealing protrusion 182 penetrates into the sealing recess 19 of the first housing 11, and the right sealing protrusion 182 penetrates into the sealing recess 19 of the second housing 12.
Further, a liquid seal component 3 is arranged at the joint of the first shell 11 and the second shell 12, and the liquid seal component 3 comprises a first liquid seal 31, a second liquid seal 32 and a liquid seal cavity 33; the liquid seal cavity 33 is a cavity formed by connecting the first liquid seal member 31 and the second liquid seal member 32; the first liquid seal member 31 and the second liquid seal member 32 are respectively a transparent plastic ring with a Z-shaped section; the first liquid seal 31 is installed on the first housing 11, the second liquid seal 32 is installed on the second housing 32, the liquid seal cavity 33 is formed after the first liquid seal 31 and the second liquid seal 32 are connected, and the liquid seal cavity 33 is filled with a sealing liquid, which may be water. Specifically, two fixing portions 311 are disposed on the lower portion of the first liquid seal member 31, and the fixing portions 311 are formed by partially extending the lower portion of the first liquid seal member 31 downward; two fixing grooves 111 are formed on the first housing 11, the fixing grooves 111 are concave rings, and the fixing portion 311 is embedded into the fixing grooves 111; since the fixing portion 311 is provided with six screw holes at intervals and the fixing groove 111 is provided with the same screw holes, the fixing portion 311 is fixed in the fixing groove 111 by a screw after the fixing portion 311 is snapped into the fixing groove 111.
When the fixing part 311 is fixed by the screw, the sealing part 312 is partially contacted with the bottom of the fixing groove 111, and the screw directly penetrates through the sealing part 312, so that the sealing performance of the area fixed by the screw can be effectively ensured not to be damaged; similarly, when the sealing part 312 contacts the bottom of the fixing groove 111, the rib 313 also contacts the bottom of the fixing groove 111, thereby enhancing the sealing property between the fixing part 311 and the fixing groove 111; meanwhile, due to the arrangement of the convex rib 313, when the fixing part 311 is fixed by a screw, under the same pressure, the contact area between the convex rib 313 and the bottom of the fixing groove 111 is small, so that the pressure of the convex rib 313 to the bottom of the fixing groove 111 is large, and under the pressure, the convex rib 313 is firstly contacted with the bottom of the fixing groove 111, so that the sealing part 312 is prevented from being subjected to degumming and deviation under the pressure of the screw.
Further, a bending part 314 is provided between the two fixing parts 311, the bending part 314 is a part between the two fixing parts 311, and the thickness of the bending part 314 is small, so that when the fixing parts 311 are clamped into the fixing groove 111 under the pressure of the screw, the bending part 314 can be arched upwards, and when the bending part 314 is arched upwards, the bending part 314 has a downward acting force; a positioning part 114 is arranged between the two fixing grooves 111, the positioning part 114 is a circle of groove with an arc-shaped bottom section, a sealing element 36 is arranged on the positioning part 114, the sealing element 36 is an O-shaped sealing ring, and the sealing element 36 is arranged between the bending part 314 and the positioning part 114, so that after the bending part 314 is bent, the sealing element 36 is pressed against the bending part to deform the bending part 314, the pressure of the bending part 314 is applied to the sealing element 36, the upper end part of the sealing element 36 is tightly contacted with the bottom surface of the bending part 314, and the lower end surface of the sealing element 36 is tightly contacted with the bottom surface of the positioning part 114.
Furthermore, a buckling part 321 and a bending part 324 are arranged on the second sealing element 32, the buckling part 321 is the lower part of the second sealing element 32, the bending part 324 is closely adjacent to the buckling part 321, and the bending part 324 is the bending part of the lower part of the second sealing element 32, that is, the lower part of the second sealing element 32 is deformed by the bending part 324; the second housing 12 is provided with a fastening groove 121, the fastening groove 121 is a circle of concave ring arranged on the second housing 12, and the fastening portion 321 is fastened into the fastening groove 121; the second housing 12 is provided with a fixing element 4, the fixing element 4 is a metal strip bent into a ring, after the fastening portion 321 is fastened into the fastening groove 121, the fixing element 4 is sleeved on the fastening portion 321, and then two ends of the fixing element 4 are connected together, so that the fastening portion 321 is pressed in the fastening groove 121.
Specifically, the fastening portion 321 is provided with a limiting groove 322, the limiting groove 322 is formed by downward recessing the upper end surface of the fastening portion 321, and the fixing member 4 is clamped into the limiting groove 322; the limiting groove 322 is provided with three first clamping parts 323, the first clamping parts 323 are a circle of protrusions arranged on the inner wall of the limiting groove 322, the side wall of the fixing part 4 is provided with three circles of second clamping parts 423, the second clamping parts 423 are a circle of protrusions arranged on the side wall of the fixing part 4, when the fixing part 4 is clamped into the limiting groove 322, the first clamping parts 323 are clamped between the two second clamping parts 423, and similarly, the second clamping parts 423 are clamped between the two first clamping parts 323, so that the preliminary fixing of the fixing part 4 is realized; after the preliminary setting is completed, the fixing member 4 can be tightened by connecting both end portions of the fixing member 4 together, and the fastening portion 321 is pressed.
Further, an arc-shaped convex part 124 is arranged in the buckling groove 121, the arc-shaped convex part 124 is positioned at the upper part of the inner wall of the right side of the buckling groove 121, an anti-falling convex part 125 is arranged on the arc-shaped convex part 124, and the anti-falling convex part 125 is obliquely arranged from top to bottom; the bending part 324 is provided with an anti-falling concave part 325, and the anti-falling convex part 125 is clamped into the anti-falling concave part 325, so that the bending part 324 is positioned; specifically, the thickness of the bending portion 324 is small, so when the fixing element 4 presses the fastening portion 321, the bending portion 324 cannot move downward along with the fastening portion 321 because the anti-falling protrusion 125 limits the bending portion 324, the bending portion 324 bends, and the bending portion 324 is in close contact with the arc-shaped protrusion 124, thereby sealing the fastening portion 321 and the fastening groove 121.
Furthermore, a connecting groove 318 is arranged at the front end of the first liquid seal member 31, a connecting convex part 328 is arranged at the front end of the second liquid seal member 32, a layer of rubber is respectively bonded on the inner wall and the bottom of the connecting groove 318, a circle of rubber is also arranged on the outer wall of the connecting convex part 328, and when in connection, the connecting convex part 328 penetrates into the connecting groove 318, so that the connection between the two is realized, and meanwhile, the rubber is deformed, so that the rubber is tightly bonded together, and the sealing performance of the rubber is guaranteed; a liquid inlet is arranged at the upper part of the second liquid seal member 32, and a layer of rubber is adhered on the liquid inlet, so that when sealing liquid is injected into the liquid seal cavity 33, a syringe is used for puncturing the rubber at the liquid inlet to inject the liquid into the liquid seal cavity 33; the liquid inlet is arranged in this way, so that when the gas amount in the liquid seal cavity 33 is increased and the internal pressure is increased, gas and sealing liquid can be sprayed out from the liquid inlet, the liquid seal component 3 is prevented from being burst, the liquid seal component 3 is prevented from being damaged, and the safety of the device is improved.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (6)
1. A vortex type air pump with a high mechanical sealing structure comprises a shell (1), an impeller arranged in the shell (1) and a driving piece (2) used for driving the impeller to rotate; the method is characterized in that: the shell (1) comprises a first shell (11) and a second shell (12) matched with the first shell (11), and a liquid seal component (3) is arranged at the joint of the first shell (11) and the second shell (12); the liquid seal component (3) comprises a first liquid seal piece (31), a second liquid seal piece (32) and a liquid seal cavity (33) arranged between the first liquid seal piece (31) and the second liquid seal piece (32), and sealing liquid is arranged in the liquid seal cavity (33); the first hydraulic seal part and the second hydraulic seal part are both transparent plastic rings; a plurality of fixing parts (311) are arranged on the first liquid seal part (31), and fixing grooves (111) matched with the fixing parts (311) are arranged on the first shell (11); the second liquid seal piece (32) is provided with a buckling part (321), and the second shell (12) is provided with a buckling groove (121) matched with the buckling part (321).
2. The high mechanical seal structure vortex air pump of claim 1, wherein: the second shell (12) is detachably connected with a fixing piece (4), and the buckling part (321) is provided with a limiting groove (322) matched with the fixing piece (4).
3. The high mechanical seal structure vortex air pump of claim 2, wherein: be equipped with a plurality of first chucking portions (323) on spacing groove (322) inner wall, be equipped with on mounting (4) lateral wall with first chucking portion (323) matched with second chucking portion (423).
4. The high mechanical seal structure vortex air pump of claim 1, wherein: the fixing part (311) is provided with a sealing part (312), and the sealing part (312) is provided with a plurality of convex ribs (313) which are contacted with the bottom of the fixing groove (111).
5. The high mechanical seal structure vortex air pump of claim 4, wherein: a bending part (314) is arranged between the two fixing parts (311), a positioning part (114) is arranged between the two fixing grooves (111), a sealing element (36) is arranged between the bending part (314) and the positioning part (114), the upper end of the sealing element (36) is in contact with the lower end surface of the bending part (314), and the lower end of the sealing element (36) is in contact with the bottom of the positioning part (114).
6. The high mechanical seal structure vortex air pump of claim 1, wherein: a bent part (324) adjacent to the buckling part (321) is arranged on the second liquid seal part (32), and an arc-shaped convex part (124) matched with the bent part (324) is arranged in the buckling groove (121); the arc-shaped convex part (124) is provided with an anti-falling convex part (125), and the bending part (324) is provided with an anti-falling concave part (325) matched with the anti-falling convex part (125).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404255.4A CN108361225B (en) | 2017-12-22 | 2017-12-22 | Vortex type air pump with high mechanical sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404255.4A CN108361225B (en) | 2017-12-22 | 2017-12-22 | Vortex type air pump with high mechanical sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108361225A CN108361225A (en) | 2018-08-03 |
| CN108361225B true CN108361225B (en) | 2020-04-14 |
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ID=63010032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711404255.4A Active CN108361225B (en) | 2017-12-22 | 2017-12-22 | Vortex type air pump with high mechanical sealing structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN108361225B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714930B (en) * | 2019-10-09 | 2021-06-11 | 苏州格力士实业有限公司 | Circulative cooling formula vortex formula air pump |
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| CN101782083A (en) * | 2010-03-12 | 2010-07-21 | 济南风机厂有限责任公司 | Sealing device for fan |
| CN205190312U (en) * | 2015-11-25 | 2016-04-27 | 安徽科达埃尔压缩机有限公司 | A atmoseal device for centrifugal blower |
| CN205678125U (en) * | 2016-06-16 | 2016-11-09 | 湖南威铭能源科技有限公司 | A kind of sealing plain washer and sealing structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5800332B2 (en) * | 2011-09-09 | 2015-10-28 | 内山工業株式会社 | gasket |
| CN203670305U (en) * | 2014-01-20 | 2014-06-25 | 浙江泰格泵业有限公司 | Vortex pump |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2931874Y (en) * | 2006-06-09 | 2007-08-08 | 宁波万华聚氨酯有限公司 | Draught fan |
| CN201461523U (en) * | 2009-04-17 | 2010-05-12 | 天门市诚鑫化工有限公司 | Mechanical pump with air leak protecting function |
| CN201461489U (en) * | 2009-08-27 | 2010-05-12 | 天津全倍电机有限公司 | Multifunctional vortex air pump |
| CN101782083A (en) * | 2010-03-12 | 2010-07-21 | 济南风机厂有限责任公司 | Sealing device for fan |
| CN205190312U (en) * | 2015-11-25 | 2016-04-27 | 安徽科达埃尔压缩机有限公司 | A atmoseal device for centrifugal blower |
| CN205678125U (en) * | 2016-06-16 | 2016-11-09 | 湖南威铭能源科技有限公司 | A kind of sealing plain washer and sealing structure |
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| CN108361225A (en) | 2018-08-03 |
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