CN106438449B - Seal assembly and centrifugal pump for centrifugal pump - Google Patents
Seal assembly and centrifugal pump for centrifugal pump Download PDFInfo
- Publication number
- CN106438449B CN106438449B CN201610887869.1A CN201610887869A CN106438449B CN 106438449 B CN106438449 B CN 106438449B CN 201610887869 A CN201610887869 A CN 201610887869A CN 106438449 B CN106438449 B CN 106438449B
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- China
- Prior art keywords
- pump housing
- impeller
- ring
- choma
- port ring
- Prior art date
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Classifications
-
- 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
- F04D29/086—Sealings especially adapted for liquid pumps
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to centrifugation pump technical fields, more particularly, to a kind of seal assembly and centrifugal pump for centrifugal pump.Purpose is to alleviate the larger caused Fluid leakage problems of impeller existing in the prior art and pump housing junction gap.Including matching used impeller port ring and pump housing choma；There is the first apparent surface and the second apparent surface between pump housing choma and impeller port ring；First apparent surface is the impeller port ring circumferential surface surface opposite with pump housing choma, and the second apparent surface is impeller port ring and pump housing choma on the opposite surface of impeller port ring radial direction.In the operating condition, there is gap between the first apparent surface, contacted between the second apparent surface.Due to seamless between the second apparent surface, therefore seal assembly can prevent the fluid flowed out from impeller water outlet by impeller and the clearance backflow of pump housing junction to impeller water inlet, to achieve the purpose that prevent fluid leakage.
Description
Technical field
The present invention relates to centrifugation pump technical fields, more particularly, to a kind of seal assembly and centrifugal pump for centrifugal pump.
Background technique
The centrifugal force that generates conveys the pump of liquid when centrifugal pump is a kind of rotation by impeller, and centrifugal pump is in the industrial production
Extensive utilization is obtained.
The structure description of centrifugal pump in the prior art is as follows:
Referring to Fig.1 and 2, including the pump housing and impeller, impeller is installed on pump housing inner cavity, and the pump housing has pump housing water inlet
With pump housing water outlet, impeller has impeller water inlet and impeller water outlet, and fluid enters impeller water inlet from pump housing water inlet, and
Pump chamber is flowed out to from the impeller water outlet, and is flowed out by pump housing water outlet.Segment fluid flow is through pump housing body ring and impeller port ring 311
Clearance backflow to impeller inlet end, be again introduced into impeller carry out fluid circulation, formed idle work.
The reflux problem of fluid results in biggish flow loss, and the working efficiency of centrifugal pump is caused to reduce.In order to reduce
This flow loss, people's common practice are to reduce the gap of impeller port ring 311 and 321 junction of pump housing choma, lead to leaf
The requirement on machining accuracy of wheel and the pump housing is higher (gap that machining accuracy height can just reduce impeller Yu pump housing junction as far as possible).
Thus, how to avoid gap larger caused fluid of the impeller port ring 311 in the prior art with pump housing choma 321
Leakage problem becomes people's technical problem urgently to be resolved.
Summary of the invention
The purpose of the present invention is to provide a kind of seal assemblies and centrifugal pump for centrifugal pump.To alleviate in the prior art
Fluid leakage problems caused by existing impeller and pump housing junction gap are larger.
In order to solve the above technical problems, the present invention provides following technical proposals:
A kind of seal assembly for centrifugal pump includes: matching used impeller port ring and pump housing choma；
The impeller port ring is set to impeller water inlet one end, can be with impeller synchronous rotary；The pump housing choma is fixed
In the pump housing inner wall of the pump housing and the impeller junction,
There is the first apparent surface and the second apparent surface between the pump housing choma and the impeller port ring；Described first
Apparent surface is the impeller port ring circumferential surface surface opposite with the impeller port ring, and second apparent surface is the impeller
Choma and the pump housing choma are on the opposite surface of the impeller port ring radial direction；
Wherein, in the operating condition, between first apparent surface have gap, and first apparent surface it
Between be capable of forming moisture film, contacted between second apparent surface；
The gap that the seal assembly is used to that the fluid flowed out from impeller water outlet to be prevented to pass through impeller and pump housing junction
It is back to impeller water inlet, the impeller port ring is used interchangeably with the pump housing choma.
Further,
The pump housing choma and the impeller port ring have the first combination form:
The pump housing choma is the first pump housing choma, and the impeller port ring is the first impeller port ring；
The section of first pump housing choma axial direction is L shape, includes the first end face body ring and first being detachably connected
Side surface body ring, the first end face body ring set are loaded on the nearly pump housing end of the first side body ring, and the first side body ring
It is greater than the length of the first end face body ring along the length of its axis direction；
First impeller port ring is built in impeller water inlet one end, is set in outside the first side body ring, and
Positioned at the nearly impeller side of the first end face body ring.
Further,
The pump housing choma and the impeller port ring have the second combination form；
The pump housing choma is the second pump housing choma, and the impeller port ring is the second impeller port ring；
The section of second pump housing choma axial direction is L shape, includes the second end face body ring and second being detachably connected
Side surface body ring, nearly pump housing end offsets the second end face body ring with the second side body ring, and the second end face body ring
Outer diameter be greater than the second side body ring outer diameter；
Second impeller port ring is built in impeller water inlet one end, is set in outside the second side body ring, and
Positioned at the nearly impeller side of the second end face body ring.
Further,
The pump housing choma and the impeller port ring have third combination form；
The pump housing choma is third pump housing choma, and the impeller port ring is third impeller port ring；
The third pump housing choma is structure as a whole, its axial section is L shape, and the nearly pump of the third pump housing choma
Body end has outside protrusion；
The third impeller port ring is built in the water inlet end of impeller, is set in outside the third pump housing choma, and institute
State the protrusion of the nearly pump housing end close to the third pump housing choma of third impeller port ring.
Further,
The pump housing choma and the impeller port ring have the 4th combination form:
The pump housing choma is the 4th pump housing choma, and the impeller port ring is the 4th impeller port ring；
The section of 4th pump housing choma axial direction is L shape, includes the third end face body ring being detachably connected and third
Side surface body ring, nearly pump housing end offsets the third end face body ring with the third side surface body ring, and the third end face body ring
Internal diameter be less than the third side surface body ring internal diameter；
4th impeller port ring is placed outside impeller water inlet one end, and be located at the third end face body ring with it is described
Third side surface body collar at region in.
Further,
The pump housing choma and the impeller port ring have the 5th combination form:
The pump housing choma is the 5th pump housing choma, and the impeller port ring is the 5th impeller port ring；
The section of 5th pump housing choma axial direction is L shape, includes the 4th end face body ring and the 4th being detachably connected
Side surface body ring, the 4th end face body ring are located inside the 4th side surface body ring, and the 4th side surface body ring is along its axis
The length in direction is greater than the length of the 4th end face body ring；
5th impeller port ring is placed outside impeller water inlet one end, and be located at the 4th end face body ring with it is described
4th side surface body collar at region.
Further,
The pump housing choma and the impeller port ring have the 6th combination form:
The pump housing choma is the 6th pump housing choma, and the impeller port ring is the 6th impeller port ring；
6th pump housing choma is structure as a whole, and axial section is L shape, and the nearly pump of the 6th pump housing choma
Body end has inside protrusion；
6th impeller port ring is placed outside impeller water inlet one end, positioned at the inside of the 6th pump housing choma, and institute
The nearly pump housing end of the 6th impeller port ring is stated close to the protrusion.
A kind of centrifugal pump, including the pump housing and the impeller for being installed on the pump housing inner cavity, the pump housing has pump housing water inlet and pump
Body water outlet, impeller have impeller water inlet and impeller water outlet, and fluid enters the impeller water inlet from pump housing water inlet, from
The impeller water inlet enters the fluid channel of the impeller internal, and flows out to the pump housing water outlet from the impeller water outlet
Mouthful；
The position that the impeller is connect with the pump housing is provided with the seal assembly of any of the above-described technical solution.
Further,
Inner wall of the pump housing in the pump housing Yu the junction of the impeller is provided for limiting the pump housing choma
Step surface.
In conjunction with above technical scheme, since seal assembly provided by the invention includes matching used impeller port ring and the pump housing
Choma；Impeller port ring is set to impeller water inlet one end, can be with impeller synchronous rotary；Pump housing choma is fixed on the pump housing and impeller
The pump housing inner wall of junction has the first apparent surface and the second apparent surface between pump housing choma and impeller port ring；First phase
It is the impeller port ring circumferential surface surface opposite with pump housing choma to surface, the second apparent surface is impeller port ring and pump housing choma in leaf
Take turns the opposite surface of choma radial direction.In the operating condition, there is gap, and opposite first between the first apparent surface
It is capable of forming moisture film between surface, is contacted between the second apparent surface；What seal assembly was used to prevent to flow out from impeller water outlet
Fluid passes through the clearance backflow of impeller and pump housing junction to impeller water inlet.Due to gapless between the second apparent surface,
Thus fluid can not be by leaking, also, in the operating condition between the second apparent surface, being capable of shape between the first apparent surface
At moisture film, moisture film effectively can prevent fluid from leaking, and fluid can not be leaked by the first apparent surface and the second apparent surface, because
And achieve the purpose that prevent fluid from leaking.
In addition, due to centrifugal pump have the seal assembly, when which is not installed, with the pump housing in the prior art and
Gap at impeller cooperation is compared, and technical solution provided by the invention can significantly increase above-mentioned gap, thus manufacture
On requirement to the cooperation precision of the pump housing and impeller reduce, and reduce the probability that impeller kills phenomenon, and extension
The service life of impeller.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for being assembled with the centrifugal pump of impeller port ring and pump housing choma in the prior art；
Fig. 2 is the structural schematic diagram of impeller port ring and pump housing choma in Fig. 1；
Fig. 3 is the first combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；
Fig. 4 is the second combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；
Fig. 5 is the third combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；
Fig. 6 is the 4th combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；
Fig. 7 is the 5th combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；
Fig. 8 is the 6th combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；
Fig. 9 is the whole knot that the seal assembly provided in an embodiment of the present invention with third combination form is installed on centrifugal pump
Structure schematic diagram；
Figure 10 is the entirety that the seal assembly with the 6th combination form provided in an embodiment of the present invention is installed on centrifugal pump
Structural schematic diagram.
Icon: the 100- pump housing；200- impeller；101- pump housing water inlet；102- pump housing water outlet；201- impeller water inlet；
202- impeller water outlet；300- seal assembly；311- impeller port ring；321- pump housing choma；The first impeller port ring of 312-；313-
Two impeller port rings；314- third impeller port ring；The 4th impeller port ring of 315-；The 5th impeller port ring of 316-；The 6th impeller mouth of 317-
Ring；322- first pump housing choma；323- second pump housing choma；324- third pump housing choma；The 4th pump housing choma of 325-；326-
5th pump housing choma；The 6th pump housing choma of 327-；3221- first end face body ring；3222- first side body ring；3231- second end
Face body ring；3232- second side body ring；3251- third end face body ring；3252- third side surface body ring；The 4th end face body of 3261-
Ring；The 4th side surface body ring of 3262-.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Embodiment 1 provides a kind of seal assembly 300 for centrifugal pump, and the seal assembly 300 is for preventing from impeller
The fluid that water outlet 202 flows out passes through the clearance backflow of impeller 200 and 100 junction of the pump housing to impeller water inlet 201, to reach
To the purpose for preventing fluid leakage.
Embodiment 2 provides a kind of centrifugal pump, using the seal assembly 300 in embodiment 1, in unassembled upper sealing
When component 300, compared with the gap at 200 cooperation of the pump housing 100 in the prior art and impeller, technical solution provided by the invention
Above-mentioned gap can be significantly increased, thus in the manufacturing, the requirement to the cooperation precision of the pump housing 100 and impeller 200 reduces,
And it reduces impeller 200 and kills the probability of phenomenon, and extend the service life of impeller 200.
It should be noted that nearly pump housing end involved in the present invention refers to that with Figure of description 1, for reference, left side is close
Pump housing end, right side are nearly impeller end.
Embodiment 1 and embodiment 2 are described in detail with reference to the accompanying drawing:
Wherein, Fig. 1 is the structural schematic diagram for being assembled with the centrifugal pump of impeller port ring and pump housing choma in the prior art；Fig. 2
For the structural schematic diagram of impeller port ring in Fig. 1 and pump housing choma；Fig. 3 is first group of seal assembly provided in an embodiment of the present invention
Close morphosis schematic diagram；Fig. 4 is the second combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；Fig. 5
For the third combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；Fig. 6 is provided in an embodiment of the present invention
4th combination form structural schematic diagram of seal assembly；Fig. 7 is the 5th combination shape of seal assembly provided in an embodiment of the present invention
State structural schematic diagram；Fig. 8 is the 6th combination form structural schematic diagram of seal assembly provided in an embodiment of the present invention；Fig. 9 is this
The seal assembly with third combination form that inventive embodiments provide is installed on the overall structure diagram of centrifugal pump；Figure 10 is
The seal assembly with the 6th combination form provided in an embodiment of the present invention is installed on the overall structure diagram of centrifugal pump.
Embodiment 1
Present embodiments provide a kind of seal assembly 300 for centrifugal pump, comprising: matching used impeller port ring and pump
Body choma.
Impeller port ring is set to 201 one end of impeller water inlet, can be with 200 synchronous rotary of impeller；Pump housing choma is fixed on
The pump housing inner wall of the pump housing 100 and 200 junction of impeller has the first apparent surface and second between pump housing choma and impeller port ring
Apparent surface；First apparent surface is the impeller port ring circumferential surface surface opposite with pump housing choma, and the second apparent surface is impeller mouth
Ring and pump housing choma are on the opposite surface of impeller port ring radial direction.
Wherein, in the operating condition, there is gap, and being capable of shape between the first apparent surface between the first apparent surface
At moisture film, contacted between the second apparent surface.
The fluid that seal assembly is used to prevent to flow out from impeller water outlet 202 passes through impeller 200 and 100 junction of the pump housing
At clearance backflow to impeller water inlet 201.The beneficial effect that the seal assembly 300 can reach is: due to the second opposite table
Gapless between face, thus fluid can not be by leaking, also, in the operating condition between the second apparent surface, first is opposite
Moisture film is capable of forming between surface, moisture film effectively can prevent fluid from leaking, and fluid can not pass through the first apparent surface and second
Apparent surface's leakage, thus achieved the purpose that prevent fluid from leaking.
In addition, since centrifugal pump has the seal assembly 300, in unassembled upper seal assembly 300, with the prior art
In pump housing choma 321 compared with the gap between impeller port ring 311, technical solution provided by the invention can significantly increase
Gap is stated, thus the requirement on manufacturing to the cooperation precision of the pump housing 100 and impeller 200 reduces, and reduces impeller
200 kill the probability of phenomenon, and extend the service life of impeller 200.
In the optinal plan of the present embodiment, above-mentioned impeller port ring and pump housing choma are used interchangeably, to improve using upper
Flexibility.
In the optinal plan of the present embodiment, pump housing choma and impeller port ring be can be set there are many combination form, it is specific and
Speech, pump housing choma and impeller port ring have the first combination form, the second combination form, third combination form, the 4th combination form,
5th combination form and the 6th combination form.Each combination form is described in more detail below:
First combination form: pump housing choma is the first pump housing choma 322, and impeller port ring is the first impeller port ring 312.First
The axial section of pump housing choma 322 is L shape, includes the first end face body ring 3221 and first side body ring being detachably connected
3222, first end face body ring 3221 is set in the nearly pump housing end of first side body ring 3222, and first side body ring 3222 is along it
The length of axis direction is greater than the length of first end face body ring 3221；First impeller port ring 312 is built in impeller water inlet 201 1
It holds, be set in outside first side body ring 3222, and be located at the nearly impeller side of first end face body ring 3221.Wherein, first end face
Body ring 3221 is not limited to threaded connection with the connection type of first side body ring 3222, interference swelling connects, binder connection
Deng.In addition, in the operating condition, the gap between the first apparent surface is 0.1-2mm, contacted between the second apparent surface.It needs
It is noted that above-mentioned first apparent surface refers to surface opposite between first side body ring 3222 and the first impeller port ring 312,
Above-mentioned second apparent surface refers to surface opposite between first end face body ring 3221 and the first impeller port ring 312.
Second combination form: pump housing choma is the second pump housing choma 323, and impeller port ring is the second impeller port ring 313；Second
The axial section of pump housing choma 323 is L shape, includes the second end face body ring 3231 and second side body ring being detachably connected
3232, nearly pump housing end offsets second end face body ring 3231 with second side body ring 3232, and second end face body ring 3231 is outer
Diameter is greater than the outer diameter of second side body ring 3232；Second impeller port ring 313 is built in 201 one end of impeller water inlet, is set in
Outside two side faces body ring 3232, and it is located at the nearly impeller side of second end face body ring 3231.Wherein, second end face body ring 3231 and
The connection type of two side faces body ring 3232 is not limited to threaded connection, interference swelling connection, binder connection etc..In addition, in work
Make under state, the gap between the first apparent surface is 0.1-2mm, is contacted between the second apparent surface.On it should be noted that
It states the first apparent surface and refers to surface opposite between second side body ring 3232 and the second impeller port ring 313, above-mentioned second is opposite
Surface refers to surface opposite between second end face body ring 3231 and the second impeller port ring 313.
Third combination form: pump housing choma is third pump housing choma 324, and impeller port ring is third impeller port ring 314；Third
Pump housing choma 324 is structure as a whole, its axial section is L shape, and the nearly pump housing end of third pump housing choma 324 has outward
Protrusion；Third impeller port ring 314 is built in the water inlet end of impeller, is set in outside third pump housing choma 324, and third impeller
Protrusion of the nearly pump housing end of choma 314 close to third pump housing choma 324.In addition, in the operating condition, between the first apparent surface
Gap be 0.1-2mm, contact between the second apparent surface.It should be noted that above-mentioned first apparent surface refers to the third pump housing
Opposite surface, above-mentioned second apparent surface refer to above-mentioned protrusion between the periphery direction and third impeller port ring 314 of choma 324
The opposite surface between third impeller port ring 314.
4th combination form: pump housing choma is the 4th pump housing choma 325, and impeller port ring is the 4th impeller port ring 315；4th
The axial section of pump housing choma 325 is L shape, includes the third end face body ring 3251 and third side surface body ring being detachably connected
3252, nearly pump housing end offsets third end face body ring 3251 with third side surface body ring 3252, and third end face body ring 3251 is interior
Diameter is less than the internal diameter of third side surface body ring 3252；4th impeller port ring 315 is placed outside 201 one end of impeller water inlet, and is located at the
In the region that three end face body rings 3251 are surrounded with third side surface body ring 3252.Wherein, third end face body ring 3251 and third side
The connection type of body ring 3252 is not limited to threaded connection, interference swelling connection, binder connection etc..In addition, in working condition
Under, the gap between the first apparent surface is 0.1-2mm, is contacted between the second apparent surface.It should be noted that above-mentioned first
Apparent surface refers to surface opposite between third side surface body ring 3252 and the 4th impeller port ring 315, and above-mentioned second apparent surface refers to
Opposite surface between third end face body ring 3251 and the 4th impeller port ring 315.
5th combination form: pump housing choma is the 5th pump housing choma 326, and impeller port ring is the 5th impeller port ring 316；5th
The axial section of pump housing choma 326 is L shape, includes the 4th end face body ring 3261 and the 4th side surface body ring being detachably connected
3262, the 4th end face body ring 3261 is located inside the 4th side surface body ring 3262, and the 4th side surface body ring 3262 is along its axis direction
Length be greater than the 4th end face body ring 3261 length；5th impeller port ring 316 is placed outside 201 one end of impeller water inlet, and position
In the region that the 4th end face body ring 3261 and the 4th side surface body ring 3262 surround.Wherein, the 4th end face body ring 3261 and the 4th side
Connection type between face body ring 3262 is not limited to threaded connection, interference swelling connection, binder connection etc..In addition, in work
Make under state, the gap between the first apparent surface is 0.1-2mm, is contacted between the second apparent surface.On it should be noted that
It states the first apparent surface and refers to surface opposite between the 4th side surface body ring 3262 and the 5th impeller port ring 316, above-mentioned second is opposite
Surface refers to surface opposite between the 4th end face body ring 3261 and the 5th impeller port ring 316.
6th combination form: pump housing choma is the 6th pump housing choma 327, and impeller port ring is the 6th impeller port ring 317；6th
Pump housing choma 327 is structure as a whole, and axial section is L shape, and the nearly pump housing end of the 6th pump housing choma 327 has inwardly
Protrusion；6th impeller port ring 317 is placed outside 201 one end of impeller water inlet, positioned at the inside of the 6th pump housing choma 327, and the 6th
The nearly pump housing end of impeller port ring 317 is close to protrusion.In addition, in the operating condition, the gap between the first apparent surface is 0.1-
2mm is contacted between the second apparent surface.It should be noted that above-mentioned first apparent surface refers to the circumference of the 6th pump housing choma 327
Opposite surface between face direction and the 6th impeller port ring 317, above-mentioned second apparent surface refer to above-mentioned protrusion and the 6th impeller mouth
Opposite surface between ring 317.
It should be noted that the length of impeller port ring described in the present embodiment and wide ratio are preferably 0.2 ~ 5.
It should be noted that the above multiple combinations form is the present embodiment preferably embodiment, fields technology people
Member it should be appreciated that under the premise of without departing from present inventive concept, other deformations and retouching in structure should all the present invention claims
Within the scope of protection.
Embodiment 2
A kind of centrifugal pump is present embodiments provided, including the pump housing 100 and the impeller 200 for being installed on 100 inner cavity of the pump housing, the pump housing
100 have pump housing water inlet 101 and pump housing water outlet 102, and impeller 200 has impeller water inlet 201 and impeller water outlet 202,
Fluid enters impeller water inlet 201 from pump housing water inlet 101, and the fluid channel of impeller internal is entered from impeller water inlet 201, and
Pump housing water outlet 102 is flowed out to from impeller water outlet 202.
The position that impeller 200 is connect with the pump housing 100 is provided with seal assembly 300.
In the further embodiment of the present embodiment, inner wall of the pump housing 100 in the pump housing 100 Yu the junction of impeller 200 is arranged
For the step surface for limiting pump housing choma.
Fig. 9 shows the structural schematic diagram that centrifugal pump is installed on the seal assembly 300 of third combination form, at this point,
Inner wall of the pump housing 100 in the pump housing 100 Yu the junction of impeller 200 is provided with step surface, the nearly pump housing end of third pump housing choma 324
It is abutted against with the step surface of the pump housing 100.Third impeller port ring 314 is connected in impeller water inlet 201.
Figure 10 shows the structural schematic diagram that the seal assembly 300 with the 6th combination form is installed on centrifugal pump, at this point,
Inner wall of the pump housing 100 in the pump housing 100 Yu the junction of impeller 200 is set as step surface, the nearly pump housing end of the 6th pump housing choma 327
It is abutted against with the step surface of the pump housing 100.6th impeller port ring 317 is set in outside impeller water inlet 201.
In order to save length, the first combination form, the second combination form, the 4th combination form and the 5th combination form group
Structural schematic diagram loaded on centrifugal pump is not shown in Figure of description, one of ordinary skill in the art be referred to Fig. 1, Fig. 9 and
Figure 10 realizes corresponding first combination form, the second combination form, the 4th combination form and the assembling of the 5th combination form respectively
In the structure type of centrifugal pump.
To sum up, it since centrifugal pump group is equipped with the seal assembly 300, thus can effectively prevent to flow from impeller water outlet 202
Fluid out passes through the clearance backflow of impeller 200 and 100 junction of the pump housing to 100 inner cavity of the pump housing.Fluid is prevented to reach
The purpose of leakage.
In addition, when the seal assembly 300 is not installed, with the gap at 200 cooperation of the pump housing 100 in the prior art and impeller
It compares, technical solution provided by the invention can significantly increase above-mentioned gap, thus to the pump housing 100 and impeller on manufacturing
The requirement of 200 cooperation precision reduces, and reduces impeller 200 and kill the probability of phenomenon, and extend impeller 200
Service life.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (9)
1. a kind of seal assembly for centrifugal pump characterized by comprising matching used impeller port ring and pump housing choma；
The impeller port ring is set to impeller water inlet one end, can be with impeller synchronous rotary；The pump housing choma is fixed on pump
The pump housing inner wall of body and the impeller junction,
There is the first apparent surface and the second apparent surface between the pump housing choma and the impeller port ring；Described first is opposite
Surface is the impeller port ring circumferential surface surface opposite with the pump housing choma, and second apparent surface is the impeller port ring
With the pump housing choma on the opposite surface of the impeller port ring radial direction；
Wherein, in the operating condition, there is gap, and the energy between first apparent surface between first apparent surface
Moisture film is enough formed, is contacted between second apparent surface；
The clearance backflow that the seal assembly is used to that the fluid flowed out from impeller water outlet to be prevented to pass through impeller and pump housing junction
To impeller water inlet,
The impeller port ring is used interchangeably with the pump housing choma.
2. seal assembly according to claim 1, which is characterized in that
The pump housing choma and the impeller port ring have the first combination form:
The pump housing choma is the first pump housing choma, and the impeller port ring is the first impeller port ring；
The section of first pump housing choma axial direction is L shape, includes the first end face body ring being detachably connected and first side
Body ring, the first end face body ring set is loaded on the nearly pump housing end of the first side body ring, and the first side body ring is along it
The length of axis direction is greater than the length of the first end face body ring；
First impeller port ring is built in impeller water inlet one end, is set in outside the first side body ring, and is located at
The nearly impeller side of the first end face body ring.
3. seal assembly according to claim 1, which is characterized in that
The pump housing choma and the impeller port ring have the second combination form；
The pump housing choma is the second pump housing choma, and the impeller port ring is the second impeller port ring；
The section of second pump housing choma axial direction is L shape, includes the second end face body ring being detachably connected and second side
Body ring, nearly pump housing end offsets the second end face body ring with the second side body ring, and the second end face body ring is outer
Diameter is greater than the outer diameter of the second side body ring；
Second impeller port ring is built in impeller water inlet one end, is set in outside the second side body ring, and is located at
The nearly impeller side of the second end face body ring.
4. seal assembly according to claim 1, which is characterized in that
The pump housing choma and the impeller port ring have third combination form；
The pump housing choma is third pump housing choma, and the impeller port ring is third impeller port ring；
The third pump housing choma is structure as a whole, its axial section is L shape, and the nearly pump housing end of the third pump housing choma
With outside protrusion；
The third impeller port ring is built in the water inlet end of impeller, is set in outside the third pump housing choma, and described
The protrusion of the nearly pump housing end of trilobed wheel choma close to the third pump housing choma.
5. seal assembly according to claim 1, which is characterized in that
The pump housing choma and the impeller port ring have the 4th combination form:
The pump housing choma is the 4th pump housing choma, and the impeller port ring is the 4th impeller port ring；
The section of 4th pump housing choma axial direction is L shape, includes the third end face body ring being detachably connected and third side
Body ring, nearly pump housing end offsets the third end face body ring with the third side surface body ring, and the third end face body ring is interior
Diameter is less than the internal diameter of the third side surface body ring；
4th impeller port ring is placed outside impeller water inlet one end, and is located at the third end face body ring and the third
Side surface body collar at region in.
6. seal assembly according to claim 1, which is characterized in that
The pump housing choma and the impeller port ring have the 5th combination form:
The pump housing choma is the 5th pump housing choma, and the impeller port ring is the 5th impeller port ring；
The section of 5th pump housing choma axial direction is L shape, includes the 4th end face body ring being detachably connected and the 4th side
Body ring, the 4th end face body ring are located inside the 4th side surface body ring, and the 4th side surface body ring is along its axis direction
Length be greater than the 4th end face body ring length；
5th impeller port ring is placed outside impeller water inlet one end, and is located at the 4th end face body ring and the described 4th
Side surface body collar at region.
7. seal assembly according to claim 1, which is characterized in that
The pump housing choma and the impeller port ring have the 6th combination form:
The pump housing choma is the 6th pump housing choma, and the impeller port ring is the 6th impeller port ring；
6th pump housing choma is structure as a whole, and axial section is L shape, and the nearly pump housing end of the 6th pump housing choma
With inside protrusion；
6th impeller port ring is placed outside impeller water inlet one end, positioned at the inside of the 6th pump housing choma, and described
The nearly pump housing end of six impeller port rings is close to the protrusion.
8. a kind of centrifugal pump, including the pump housing and the impeller for being installed on the pump housing inner cavity, the pump housing has pump housing water inlet and the pump housing
Water outlet, impeller have impeller water inlet and impeller water outlet, and fluid enters the impeller water inlet from pump housing water inlet, from institute
The fluid channel that impeller water inlet enters the impeller internal is stated, and flows out to the pump housing water outlet from the impeller water outlet
Mouthful；
It is characterized in that, being arranged in the position that the impeller is connect with the pump housing described in any item just like claim 1-7
Seal assembly.
9. centrifugal pump according to claim 8, which is characterized in that connection of the pump housing in the pump housing and the impeller
The inner wall at place is provided for limiting the step surface of the pump housing choma.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610887869.1A CN106438449B (en) | 2016-10-12 | 2016-10-12 | Seal assembly and centrifugal pump for centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610887869.1A CN106438449B (en) | 2016-10-12 | 2016-10-12 | Seal assembly and centrifugal pump for centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106438449A CN106438449A (en) | 2017-02-22 |
| CN106438449B true CN106438449B (en) | 2019-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610887869.1A Expired - Fee Related CN106438449B (en) | 2016-10-12 | 2016-10-12 | Seal assembly and centrifugal pump for centrifugal pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN106438449B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989051B (en) * | 2017-05-19 | 2023-05-12 | 合肥工业大学 | Sealing mouth ring for centrifugal pump |
| CN113027805B (en) * | 2021-03-30 | 2024-05-17 | 上海凯泉泵业（集团）有限公司 | Pressurized sealing energy-saving device for pump |
| CN113309732B (en) * | 2021-05-31 | 2023-05-16 | 景德镇学院 | Gas conveying device |
| CN113482937A (en) * | 2021-08-23 | 2021-10-08 | 江苏永一泵业科技集团有限公司 | Hot water circulating pump mouth ring device with supporting structure |
| CN114033706A (en) * | 2021-11-17 | 2022-02-11 | 嘉利特荏原泵业有限公司 | Centrifugal pump |
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| US4023918A (en) * | 1975-02-10 | 1977-05-17 | Itt Industries, Inc. | Pump |
| CN2151288Y (en) * | 1992-12-04 | 1993-12-29 | 孙培森 | Single stage pump |
| CN201751587U (en) * | 2010-06-13 | 2011-02-23 | 西安航天泵业有限公司 | Sealing device for centrifugal pump impeller wear ring |
| CN201925241U (en) * | 2010-06-01 | 2011-08-10 | 江苏海狮泵业制造有限公司 | Cavitation-resistant structure of wedge-shaped ring for centrifugal pump |
| CN201982359U (en) * | 2011-03-17 | 2011-09-21 | 张建民 | Wear ring sealing structure of multistage centrifugal pump |
| CN203488425U (en) * | 2013-08-06 | 2014-03-19 | 王财成 | Centrifugal pump sealing structure and centrifugal pump |
| CN206129682U (en) * | 2016-10-12 | 2017-04-26 | 浙江远邦流体科技有限公司 | A seal assembly and centrifugal pump for centrifugal pump |
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2016
- 2016-10-12 CN CN201610887869.1A patent/CN106438449B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4023918A (en) * | 1975-02-10 | 1977-05-17 | Itt Industries, Inc. | Pump |
| CN2151288Y (en) * | 1992-12-04 | 1993-12-29 | 孙培森 | Single stage pump |
| CN201925241U (en) * | 2010-06-01 | 2011-08-10 | 江苏海狮泵业制造有限公司 | Cavitation-resistant structure of wedge-shaped ring for centrifugal pump |
| CN201751587U (en) * | 2010-06-13 | 2011-02-23 | 西安航天泵业有限公司 | Sealing device for centrifugal pump impeller wear ring |
| CN201982359U (en) * | 2011-03-17 | 2011-09-21 | 张建民 | Wear ring sealing structure of multistage centrifugal pump |
| CN203488425U (en) * | 2013-08-06 | 2014-03-19 | 王财成 | Centrifugal pump sealing structure and centrifugal pump |
| CN206129682U (en) * | 2016-10-12 | 2017-04-26 | 浙江远邦流体科技有限公司 | A seal assembly and centrifugal pump for centrifugal pump |
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| Publication number | Publication date |
|---|---|
| CN106438449A (en) | 2017-02-22 |
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Granted publication date: 20190802 Termination date: 20211012 |