CN208651258U - Rotor pump shaft sealing device - Google Patents
Rotor pump shaft sealing device Download PDFInfo
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- CN208651258U CN208651258U CN201821169718.3U CN201821169718U CN208651258U CN 208651258 U CN208651258 U CN 208651258U CN 201821169718 U CN201821169718 U CN 201821169718U CN 208651258 U CN208651258 U CN 208651258U
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- rotating
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- 238000007789 sealing Methods 0.000 title claims abstract description 33
- 230000006835 compression Effects 0.000 claims abstract description 29
- 238000007906 compression Methods 0.000 claims abstract description 29
- 238000009827 uniform distribution Methods 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 abstract description 19
- 238000010586 diagram Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 241001347978 Major minor Species 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 241000734468 Listera Species 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of spring is provided and is located at the rotor pump shaft sealing device that will not be contacted with material in individual cavities, machine envelope seat (3) is sleeved on stationary seat (4) outside and is fixedly connected with the pump housing (2), the cylinder of stationary seat (4) protrudes into machine envelope seat (3) inner cavity, compression spring (6) are set in the toroidal cavity (5) formed between stationary seat (4) and machine envelope seat (3), the first O-ring (7) are set on the inside of the pump of toroidal cavity (5), the second O-ring (8) are set between machine envelope seat (3) and the pump housing (2)；2 dogbolts (9) are at least set between stationary seat (4) and machine envelope seat (3), there are radial clearances and axial gap for the dogbolt (9)；Stationary ring (21) is installed on the outside of the pump of stationary seat (4)；Rotating seat (10) is fixedly connected with axis (1), and rotating ring (11) is installed on the inside of the pump of rotating seat (10), and rotating ring (11) mutually is close to form revolute pair with stationary ring (21)；The sealing performance and service life of impeller pump can effectively be promoted.
Description
Technical field
The utility model relates to a kind of impeller pumps, especially its shaft sealer.
Background technique
Impeller pump is also known as colloid pump, impeller pump, general-purpose delivery pump etc., since its impeller is shaped like cam, also referred to as lobe pump,
Impeller pump belongs to positive displacement pump；Generally birotor.Impeller pump is to convey unit by means of multiple fixed volumes in working chamber
It is periodically converted and achievees the purpose that trandfer fluid material.It is usually driven by motor a pair of of synchromesh gear, is driven major-minor axis, double turns
Son under the drive of major-minor axis, synchronizes opposite direction rotation, the volume of pump is made to change respectively, to constitute higher true
Reciprocal of duty cycle and discharge pressure；Entrance is low-pressure area, and exit is higher-pressure region.Impeller pump is mainly used for sanitation-grade material and corrosion
The conveying of property, high-viscosity material.
Material is subjected to elevated pressures in pump output terminal when due to rotor pump work, and material is easy to let out from the between centers of rotation
Leakage.In order to avoid fluid foods leakage, the sealing of impeller pump is extremely important, the development of adjoint impeller pump technology, impeller pump
Sealing is always one of its key technology；The sealing performance of impeller pump and the service life of sealing are promoted, is this field
The target of technical staff's long-sought.The sealing of impeller pump at present mainly includes mechanical sealing and material filling type sealing,
Based on mechanical sealing.The mechanical sealing of impeller pump is forced using compression spring with the rotating ring of axis transhipment and opposite
Static stationary ring end face is mutually close to, and uses seal with O ring at the gap on periphery.Rotating ring rubs with stationary ring when due to rotor pump work
It wipes, the machine sealing including rotating ring and stationary ring and O-ring is all subjected to fever abrasion, causes its sealing performance to decline, until occurring
Maintenance downtime is just needed when fluid foods obviously leak.Keep the elasticity of impeller pump compression spring extremely important, if compression bullet
Spring decline, will severely impact the sealing performance of its shaft sealer and the service life of sealing.
In prior art, what the compression spring of rotor pump shaft sealing device was designed to contact with material, such as
Inventor proposed patent application by applicant in this case affiliated company in scheme of the invention before this, these schemes.First is that
2016.10.21 the CN201610917398.4 patent application proposed, entitled " rotor pump shaft sealing device ", publication No.
For CN106286291A；Second is that CN201610916537.1 patent application, entitled " shaft sealer of impeller pump ",
Publication No. is CN106286290A；Material is easy to happen packing phenomenon at the compression spring of inner cavity.Third is that 2017.05.22 is proposed
CN201710368428.5 patent application, entitled " impeller pump and its shaft sealer ", publication No. is
CN107061266A；With circular opening instead of multiple through-holes in former scheme, so that material is in the inner cavity where compression spring
Disengaging is more unobstructed, can mitigate material and packing phenomenon occurs at the compression spring of inner cavity；But it is not inherently eliminated because being pressurized
Spring contacts brought drawback with material, material accumulation phenomenon still can occur at spring, to influence the bullet of compression spring
Property, and then influence the sealing performance of impeller pump and the service life of sealing.
The utility model is precisely in order to solve above-mentioned technical problem.The utility model can be regarded as above scheme into one
The improvement of step.
Summary of the invention
Technical problem to be solved in the utility model is status in view of the above technology, provides a kind of rotor shaft seal dress
It sets, compression spring is located in individual cavities will not contact always with material.
Technical solution adopted by the utility model to solve the above technical problems is as follows:
A kind of rotor pump shaft sealing device, including the static static components of the opposite pump housing (2) and with axis (1) with respect to the pump housing
(2) moving ring assembly rotated, static components include machine envelope seat (3), stationary seat (4), stationary ring (21), and moving ring assembly includes rotating seat
(10) and the rotating ring (11) that is driven by it, cylindrical and be sleeved on outside axis (1), which is characterized in that machine seals seat (3) suit
Be fixedly connected in stationary seat (4) outside and with the pump housing (2), the cylinder of stationary seat (4) protrudes into machine envelope seat (3) inner cavity, stationary seat (4) with
Machine seals between seat (3) and forms toroidal cavity (5), compression spring (6) is arranged in toroidal cavity (5), the pump of the toroidal cavity (5)
Is arranged the first O-ring (7) between machine envelope seat (3) and stationary seat (4) of inside, machine, which seals between seat (3) and the pump housing (2), is arranged the
Two O-rings (8)；At least it is arranged 2 only along stationary seat (4) circumference between the flange end and machine envelope seat (3) in stationary seat (4) pump outside
Dynamic bolt (9), which passes through the flange end in stationary seat (4) pump outside there are radial clearance and machine seals seat (3) spiral shell
Line connection, between the flange end and machine envelope seat (3), there are between axial direction between the flange end and dogbolt (9) end
Gap；Stationary ring (21) is installed on the outside of the pump of stationary seat (4)；Rotating seat (10) is fixedly connected with axis (1), and rotating ring (11) is installed on dynamic
On the inside of the pump of ring seat (10), third O-ring (12) are set between rotating ring (11), rotating seat (10) and axis (1)；Rotating ring (11) connect
Contacting surface is mutually close to the contact surface of stationary ring (21).
It is further embodiment individually below.
The compression spring (6) is the single traditional big spring or waveform spring being sleeved on outside axis (1)；Alternatively, institute
Stating compression spring (6) is the multiple little springs uniformly distributed along stationary seat (4) excircle.
It adds spring washer (15) in the toroidal cavity (5), the single big spring or waveform spring or multiple small bullets
Wherein one end of spring withstands on the wherein side of spring washer (15).
The stationary seat (4) pumps outer its inner wall circumference of lateral edge and 2 convex ribs (16) is at least arranged, and the stationary ring (21) is outside it
The corresponding recess (17) of side wall circumference setting；2 convex ribs are at least arranged in its inner wall circumference of lateral edge in the pump of the rotating seat (10)
(16), corresponding recess (17) is arranged along its lateral wall circumference in the rotating ring (11).
The stationary seat (4) pumps outer its inner wall circumference uniform distribution of lateral edge and 4 convex ribs (16) is arranged, and the stationary ring (21) is outside it
Corresponding 4 recess (17) are arranged in side wall circumference uniform distribution；Its inner wall circumference uniform distribution of lateral edge setting 4 in the pump of the rotating seat (10)
4 recess (17) are arranged along its lateral wall circumference uniform distribution in a convex ribs (16), the rotating ring (11).
It is arranged 4 along stationary seat (4) circumference uniform distribution between the flange end and machine envelope seat (3) in stationary seat (4) pump outside
Dogbolt (9), correspondingly, the flange end in the stationary seat (4) pump outside opens up 4 through-holes (22), institute along its circumference uniform distribution
It states machine envelope seat (3) and opens up 4 threaded holes (23) along its circumference uniform distribution.
Pump outer flange end circumference along machine envelope seat (3) opens up multiple connecting holes (18), through multiple connection bolts
(19) it is fixedly connected on the outside of the pump housing (2)；Rotating seat (10) cylinder symmetrically opens up 1 pair of pinhole (20), through 1 pair of pin
It is fixedly connected with axis (1).
The 4th O is arranged in the stationary ring (21) and stationary seat (4) split settings between the stationary ring (21) and stationary seat (4)
Shape circle (14).
The stationary ring (21) is wholely set with stationary seat (4), and the stationary ring (21) is embedded on stationary seat (4).
Wearing layer is coated on the contact surface of the rotating ring (11) and the contact surface of stationary ring (21).
The utility model impeller pump shaft seal device machine envelope seat (3) is sleeved on stationary seat (4) outside and fixes with the pump housing (2)
Connection, the cylinder of stationary seat (4) protrude into machine envelope seat (3) inner cavity, form toroidal cavity between stationary seat (4) and machine envelope seat (3)
(5), compression spring (6) are set in toroidal cavity (5), machine envelope seat (3) and stationary seat on the inside of the pump of the toroidal cavity (5)
(4) it is arranged between the first O-ring (7), the second O-ring (8) is set between machine envelope seat (3) and the pump housing (2)；Compression spring (6) position
It in independent toroidal cavity (5), will not contact, be inherently eliminated because compression spring and material contact institute with material always
The drawbacks of bringing, material accumulation phenomenon occurs at spring never again, and compression spring can keep its its elasticity, Jin Erneng well
The sealing performance of impeller pump and the service life of sealing are kept well.In addition, the utility model impeller pump shaft seal
2 dogbolts are at least set along stationary seat (4) circumference between the flange end and machine envelope seat (3) in device stationary seat (4) pump outside
(9), which passes through the flange end in stationary seat (4) pump outside there are radial clearance and machine envelope seat (3) screw thread connects
It connects, between flange end and machine envelope seat (3), there are axial gaps between flange end and dogbolt (9) end；As setting
Dogbolt (9), can cooperate well compression spring, gives full play to compression spring and eliminates impact, establishes dynamic equilibrium, make
Ring, stationary ring remain effective contact.
Detailed description of the invention
Fig. 1 is the utility model rotor pump shaft sealing device partial profile structure；
Fig. 2 is the utility model rotor pump shaft sealing device the schematic diagram of the section structure；
Fig. 3, Fig. 4 are the utility model rotor pump shaft sealing device machine envelope seat stereoscopic schematic diagram, show not Tongfang respectively
Position；
Fig. 5, Fig. 6 are the utility model rotor pump shaft sealing device stationary seat stereoscopic schematic diagram, show not Tongfang respectively
Position；
Fig. 7, Fig. 8 are the utility model stationary ring stereoscopic schematic diagram, show different direction respectively；
Fig. 9, Figure 10 are spring washer stereoscopic schematic diagram, show different direction respectively；
Figure 11, Figure 12 are the utility model rotating seat stereoscopic schematic diagram, show different direction respectively；
Figure 13, Figure 14 are the utility model rotating ring stereoscopic schematic diagram, show different direction respectively.
Specific embodiment
Below specific embodiment of the present utility model to be described in detail shown in Fig. 1 to Figure 14.For the convenience of description, by each
Machine sealing towards the side in impeller pump be referred to as pump inside, towards impeller pump outside side be referred to as pump outside.
The utility model shaft sealer is primarily adapted for use in impeller pump, and usual this impeller pump includes the pump housing 2, as interaction
2 impellers of rotor are located in the pump housing 2, and the respective corresponding impeller of two parallel axis 1 of synchronized case output is fixed to be connected
It connects；Impeller is usually twayblade or three blades.
As shown in Figure 1, a kind of shaft sealer of impeller pump, including the static static components of the opposite pump housing (2) and with axis
(1) relative to the moving ring assembly of the pump housing (2) rotation, static components include machine envelope seat (3), stationary seat (4), stationary ring (21), rotating ring group
Part includes rotating seat (10) and the rotating ring (11) being driven by it, cylindrical and be sleeved on outside axis (1), and machine seals seat (3) set
It is fixedly connected outside and with the pump housing (2) mounted in stationary seat (4), machine seals seat (3) as shown in Figure 3, Figure 4, such as Fig. 5, Fig. 6 institute of stationary seat 4
Showing, the cylinder of stationary seat (4) protrudes into machine envelope seat (3) inner cavity, toroidal cavity (5) are formed between stationary seat (4) and machine envelope seat (3),
Compression spring (6) are set in toroidal cavity (5)；As shown in Figure 1, compression spring (6) is the single big bullet being sleeved on outside axis (1)
Spring, single traditional big spring or waveform spring；Alternatively, as shown in Fig. 2, the compression spring (6) is along stationary seat (4) outer circle
Multiple little springs of Zhou Junbu.As shown in Figure 1, can be added spring washer (15) in the toroidal cavity (5), spring washer (15)
As shown in Figure 9, Figure 10, wherein one end of the single big spring or multiple little springs withstands on wherein the one of spring washer (15)
Side.If length be entire toroidal cavity span, can make spring dismounting it is very difficult, can add spring washer (15) make by
Pressing spring (6) is shorter in length than cavity span, and spring can be made to be easy dismounting.
As shown in Figure 1, machine envelope seat (3) on the inside of the pump of the toroidal cavity (5) and the first O of setting between stationary seat (4)
The second O-ring (8) are arranged between machine envelope seat (3) and the pump housing (2) in shape circle (7)；The flange end and machine in stationary seat (4) pump outside seal
2 dogbolts (9) are at least set along stationary seat (4) circumference between seat (3), which there are radial clearance wears
Flange end and the machine envelope seat (3) for crossing stationary seat (4) pump outside are threadedly coupled, and the flange end and machine seal between seat (3), the method
There are axial gaps between Lan Duanyu dogbolt (9) end；Such dogbolt (9) is set, can cooperate well by
Pressing spring gives full play to compression spring and eliminates impact, establishes dynamic equilibrium, rotating ring, stationary ring is made to remain effective contact.Preferentially
Mode: 4 stop are set along stationary seat (4) circumference uniform distribution between the flange end and machine envelope seat (3) in stationary seat (4) pump outside
Bolt (9), correspondingly, the flange end in the stationary seat (4) pump outside opens up 4 through-holes (22), the machine along its circumference uniform distribution
It seals seat (3) and opens up 4 threaded holes (23) along its circumference uniform distribution.
Stationary ring (21) is installed on the outside of the pump of stationary seat (4).Clamped to realize, the stationary seat (4) pump outer lateral edge its
2 convex ribs (16) are at least arranged in inner wall circumference, and corresponding recess (17) is arranged along its lateral wall circumference in the stationary ring (21)；It is described
2 convex ribs (16) are at least arranged in its inner wall circumference of lateral edge in the pump of rotating seat (10), and the rotating ring (11) is along its lateral wall circumference
The corresponding recess (17) of setting.Mode of priority: as shown in fig. 6, the stationary seat (4) pumps outer its inner wall circumference uniform distribution of lateral edge setting
4 convex ribs (16), as shown in Figure 7, Figure 8, the stationary ring (21) is along corresponding 4 recess of its lateral wall circumference uniform distribution setting
(17).It is realized on the outside of the pump that stationary ring (21) is installed on stationary seat (4) in such a way that convex ribs (16) and recess (17) match.
As shown in Figure 1, rotating seat (10) is fixedly connected with axis (1), rotating ring (11) is installed on the inside of the pump of rotating seat (10).
Third O-ring (12) are set between rotating ring (11), rotating seat (10) and axis (1), the is arranged between stationary ring (21) and stationary seat (4)
Four O-rings (14)；The contact surface of rotating ring (11) is mutually close to the contact surface of stationary ring (21).Rotating ring (11) are clamped in order to realize
On the inside of the pump of rotating seat (10), as shown in figure 11, its inner wall circumference uniform distribution of lateral edge is arranged 4 in the pump of the rotating seat (10)
4 recess (17) are arranged along its lateral wall circumference uniform distribution in convex ribs (16), as shown in figs. 13 and 14, the rotating ring (11).With convex ribs
(16) mode to match with recess (17), which is realized, is installed on rotating ring (11) on the inside of the pump of rotating seat (10).
As shown in Figure 3, Figure 4, the pump outer flange end circumference along machine envelope seat (3) opens up multiple connecting holes (18), passes through
It is fixedly connected on the outside of multiple connection bolts (19) and the pump housing (2).As shown in Figure 11, Figure 12, rotating seat (10) cylinder is symmetrically opened
If 1 pair of pinhole (20), it is fixedly connected through 1 pair of pin with axis (1).
It, can be in the contact surface of rotating ring (11) and spraying abrasion-proof layer on the contact surface of stationary ring (21) in order to enhance wearability.
Stationary ring (21) can also be wholely set with stationary seat (4), and stationary ring (21) is embedded on stationary seat (4).
The compression spring (6) of the utility model rotor pump shaft sealing device is located in independent toroidal cavity (5), always not
It can be contacted with material, be inherently eliminated because of compression spring drawback brought by contacting with material, sent out never again at spring
Raw material accumulation phenomenon, compression spring can keep its its elasticity well, and then can keep the sealing of impeller pump well
It can be with the service life of sealing.
Claims (10)
1. a kind of rotor pump shaft sealing device, including the static static components of the opposite pump housing (2) and with axis (1) with respect to the pump housing (2)
The moving ring assembly of rotation, static components include machine envelope seat (3), stationary seat (4), stationary ring (21), and moving ring assembly includes rotating seat
(10) and the rotating ring (11) that is driven by it, cylindrical and be sleeved on outside axis (1), which is characterized in that machine seals seat (3) suit
Be fixedly connected in stationary seat (4) outside and with the pump housing (2), the cylinder of stationary seat (4) protrudes into machine envelope seat (3) inner cavity, stationary seat (4) with
Machine seals between seat (3) and forms toroidal cavity (5), compression spring (6) is arranged in toroidal cavity (5), the pump of the toroidal cavity (5)
Is arranged the first O-ring (7) between machine envelope seat (3) and stationary seat (4) of inside, machine, which seals between seat (3) and the pump housing (2), is arranged the
Two O-rings (8)；At least it is arranged 2 only along stationary seat (4) circumference between the flange end and machine envelope seat (3) in stationary seat (4) pump outside
Dynamic bolt (9), which passes through the flange end in stationary seat (4) pump outside there are radial clearance and machine seals seat (3) spiral shell
Line connection, between the flange end and machine envelope seat (3), there are between axial direction between the flange end and dogbolt (9) end
Gap；Stationary ring (21) is installed on the outside of the pump of stationary seat (4)；Rotating seat (10) is fixedly connected with axis (1), and rotating ring (11) is installed on dynamic
On the inside of the pump of ring seat (10), third O-ring (12) are set between rotating ring (11), rotating seat (10) and axis (1)；Rotating ring (11) connect
Contacting surface is mutually close to the contact surface of stationary ring (21).
2. shaft sealer as described in claim 1, which is characterized in that the compression spring (6) is to be sleeved on outside axis (1)
Single traditional big spring or waveform spring；Alternatively, the compression spring (6) is along uniformly distributed more of stationary seat (4) excircle
A little spring.
3. shaft sealer as claimed in claim 2, which is characterized in that add spring washer in the toroidal cavity (5)
(15), wherein one end of the single big spring or waveform spring or multiple little springs withstands on wherein the one of spring washer (15)
Side.
4. shaft sealer as described in claim 1, which is characterized in that the stationary seat (4) pumps outer its inner wall circumference of lateral edge
2 convex ribs (16) are at least set, and corresponding recess (17) is arranged along its lateral wall circumference in the stationary ring (21)；The rotating seat
(10) 2 convex ribs (16) are at least arranged in its inner wall circumference of lateral edge in pump, and phase is arranged along its lateral wall circumference in the rotating ring (11)
The recess (17) answered.
5. shaft sealer as claimed in claim 4, which is characterized in that the stationary seat (4) pumps outer its inner wall circumference of lateral edge
4 convex ribs (16) are uniformly arranged, corresponding 4 recess (17) are arranged along its lateral wall circumference uniform distribution in the stationary ring (21)；It is described
4 convex ribs (16) are arranged in its inner wall circumference uniform distribution of lateral edge in the pump of rotating seat (10), and the rotating ring (11) is along its lateral wall circumference
It is uniformly arranged 4 recess (17).
6. shaft sealer as described in claim 1, which is characterized in that the flange end and machine in stationary seat (4) pump outside
It seals between seat (3) and 4 dogbolts (9) is set along stationary seat (4) circumference uniform distribution, correspondingly, the stationary seat (4) pump outside
Flange end opens up 4 through-holes (22) along its circumference uniform distribution, and machine envelope seat (3) opens up 4 threaded holes (23) along its circumference uniform distribution.
7. shaft sealer as described in claim 1, which is characterized in that along the pump outer flange end of machine envelope seat (3) circle
The multiple connecting holes of Zhou Kaishe (18), through being fixedly connected on the outside of multiple connection bolts (19) and the pump housing (2)；The rotating seat (10)
Cylinder symmetrically opens up 1 pair of pinhole (20), is fixedly connected through 1 pair of pin with axis (1).
8. shaft sealer as described in claim 1, which is characterized in that the stationary ring (21) is seperated with stationary seat (4) to be set
It sets, the 4th O-ring (14) is set between the stationary ring (21) and stationary seat (4).
9. shaft sealer as described in claim 1, which is characterized in that the stationary ring (21) is wholely set with stationary seat (4),
The stationary ring (21) is embedded on stationary seat (4).
10. shaft sealer as described in claim 1, which is characterized in that the contact surface of the rotating ring (11) and stationary ring (21)
Contact surface on be coated with wearing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821169718.3U CN208651258U (en) | 2018-07-23 | 2018-07-23 | Rotor pump shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821169718.3U CN208651258U (en) | 2018-07-23 | 2018-07-23 | Rotor pump shaft sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208651258U true CN208651258U (en) | 2019-03-26 |
Family
ID=65785613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821169718.3U Active CN208651258U (en) | 2018-07-23 | 2018-07-23 | Rotor pump shaft sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208651258U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843615A (en) * | 2018-07-23 | 2018-11-20 | 余姚市华泰邦威泵业有限公司 | rotor pump shaft sealing device |
-
2018
- 2018-07-23 CN CN201821169718.3U patent/CN208651258U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843615A (en) * | 2018-07-23 | 2018-11-20 | 余姚市华泰邦威泵业有限公司 | rotor pump shaft sealing device |
| CN108843615B (en) * | 2018-07-23 | 2024-08-13 | 浙江华泰邦威泵业有限公司 | Rotor pump shaft sealing device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 315414 Luojiang village, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Patentee after: Zhejiang Huatai Bangwei Pump Co.,Ltd. Country or region after: China Address before: 315414 Bangwei Pump Industry Company, Luojiang Industrial Zone, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Patentee before: YUYAO HUATAI BANGWEI PUMP INDUSTRY Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |