CN107218251A - A kind of pump head device - Google Patents
A kind of pump head device Download PDFInfo
- Publication number
- CN107218251A CN107218251A CN201710425031.5A CN201710425031A CN107218251A CN 107218251 A CN107218251 A CN 107218251A CN 201710425031 A CN201710425031 A CN 201710425031A CN 107218251 A CN107218251 A CN 107218251A
- Authority
- CN
- China
- Prior art keywords
- impeller
- inner casing
- cylindrical shell
- pump shaft
- column inner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
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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
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
Abstract
The invention discloses a kind of pump head device, belong to pump field.The pump head device includes cylindrical shell, column inner casing, pump shaft and impeller, column inner casing is co-axially located in cylindrical shell, water conservancy diversion gap is provided between the outer wall of column inner casing and the inwall of cylindrical shell, the first end of pump shaft is located at outside column inner casing, second end of pump shaft is located in column inner casing, impeller is co-axially located in the first end of pump shaft, it is provided with one end of the close impeller of column inner casing centered on impeller, the first stator stretched out in the shape of a spiral, the stator of multi-disc second is provided with the lateral wall of column inner casing, the stator of multi-disc second is arranged around pump shaft circumferential array, because liquid is continuing helically to flow after throwing away from impeller under the effect of the first stator, and the direction of motion of liquid is gradually changed into the helical flow along pump shaft axial direction, reduce the impact that liquid is produced to cylindrical shell, so as to reduce the vibrations of LNG immersed pumps, improve the efficiency of LNG immersed pumps.
Description
Technical field
The present invention relates to pump field, more particularly to a kind of pump head device.
Background technology
LNG (Liquefied Natural Gas, liquefied natural gas) cargo ship is the liquefaction that transport temperature is less than -162 DEG C
The specialized ships of natural gas.In the links such as LNG storage, output, reception, it is required for using LNG immersed pumps.LNG dives liquid
The primary structure of pump is pump head device, and the structure of pump head device has very big influence to the efficiency of LNG immersed pumps.
The pump head device of existing LNG immersed pumps mainly includes the cylindrical shell and column inner casing being set-located, column
Water conservancy diversion gap is left between the madial wall of shell and the lateral wall of column inner casing.It is inserted with column inner casing on pump shaft, pump shaft same
Axle, which is connected with, sets the oriented stator extended spirally away from impeller one end on impeller, the lateral wall of column inner casing, LNG immersed pumps exist
During work, pump shaft is rotated so as to impeller rotation, and LNG is inhaled into from the liquid feeding end of impeller, is thrown out of by the outlet end of impeller,
Stator on the lateral wall of column inner casing is threadingly advanced in water conservancy diversion gap, finally from the remote of cylindrical shell and column inner casing
One end from impeller is thrown away.
Due to LNG from the outlet end of impeller be thrown out of when, Radial Flows of the LNG along pump shaft, and entering behind water conservancy diversion gap,
Axial direction flowings of the LNG along pump shaft, therefore the LNG inwall generations of meeting to cylindrical shell during water conservancy diversion gap is entered are larger
Radial impact, LNG immersed pumps can be made to produce larger vibrations, and reduce the efficiency of LNG immersed pumps.
The content of the invention
There are larger vibrations in order to solve existing LNG immersed pumps, and efficiency it is low the problem of, the embodiment of the present invention is provided
A kind of pump head device.The technical scheme is as follows：
A kind of pump head device, the pump head device is included outside cylindrical shell, column inner casing, pump shaft and impeller, the column
One end of shell is provided with pump head entrance, and the other end of the cylindrical shell is exported provided with pump head, and the column inner casing is co-axially located at
In the cylindrical shell, the pump head entrance is communicated between the outer wall of the column inner casing and the inwall of the cylindrical shell
The water conservancy diversion gap exported with the pump head, the pump shaft is rotationally coaxially plugged on the column inner casing, the pump shaft
First end is located at outside the column inner casing, and the second end of the pump shaft is located in the column inner casing, and the impeller is coaxially disposed
In the first end of the pump shaft, and the feed liquor of the impeller is rectified to the pump head entrance, the close institute of the column inner casing
State and be provided with one end of impeller centered on the impeller, the first stator stretched out in the shape of a spiral, and the direction of spiral
Steering with the impeller is identical, and first stator has multi-disc, and the first stator is around the pump shaft circumferential array cloth described in multi-disc
Put, the ultimate range of axis of the described one end of first stator away from the impeller to the pump shaft is more than the column inner casing
The stator of multi-disc second is provided with external diameter, the lateral wall of the column inner casing, the stator of multi-disc second is circumferential around the pump shaft
Array arranges that second stator includes the planar portions of the cambered surface portion extended along camber line and the axis extension along the pump shaft, institute
The plane tangent of one end of the close impeller in cambered surface portion is stated in the radial direction of the pump shaft, the remote institute in the cambered surface portion
State impeller one end surface parallel to the pump shaft axis, the remote impeller in the planar portions and the cambered surface portion
One end is connected.
Preferably, the pump head device also includes inducer, and the inducer is co-axially located on the pump shaft, and described
Inducer is located at the pump head porch.
Further, the pump head porch of the cylindrical shell is provided with the first wear ring, the liquid feeding end position of the impeller
In in first wear ring, and the liquid feeding end of the impeller coordinates with the described first wear-resisting czermak space.
Preferably, be provided with gimbal on the surface of the column inner casing, the gimbal be located at the column inner casing and
Between the impeller, the gimbal is coaxially disposed with the pump shaft, is set between the inwall of the gimbal and the pump shaft
Equilibrium gap, the ft connection of the equilibrium gap and the cylindrical shell.
Preferably, it is provided with the cylindrical shell in catheter, the column inner casing and is provided with balanced loop, the balance
Equilibrium gap described in circuit communication and the catheter, the ft connection of the catheter and the cylindrical shell.
Alternatively, the cylindrical shell is provided with cylinder shape groove, the cylinder shape groove close to the surface of the impeller
Side wall on be provided with the second wear ring, the impeller is provided with coaxial with the impeller close to the surface of the cylindrical shell
Bulge loop, the bulge loop is arranged in second wear ring, and the bulge loop coordinates with the described second wear-resisting czermak space.
Preferably, the pump shaft is arranged on the column inner casing by deep groove ball bearing.
Further, multiple rollers are provided with the lateral wall of the cylindrical shell, the multiple roller is along the column
Shell circumferentially, each axis co-planar of the roller with the cylindrical shell.
Alternatively, suspension ring are provided with the lateral wall of the cylindrical shell.
Alternatively, it is provided with the pump shaft on the shaft shoulder, the pump shaft and is arranged with back-up ring, the impeller is installed in institute
State between the shaft shoulder and the back-up ring.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：By the way that column inner casing is co-axially located at into post
In shape shell, make the water conservancy diversion that connection pump head entrance and pump head outlet are formed between the outer wall of column inner casing and the inwall of cylindrical shell
Gap, by the way that pump shaft is plugged on column inner casing, sets impeller on pump shaft, the liquid feeding end faces toward pump head entrance of impeller, from
And can be rotated by controlling impeller, liquid is sucked from pump head entrance, and throw away from the outlet end of impeller.Due to column inner casing
Close to impeller one end on be provided with centered on impeller, the first stator stretched out in the shape of a spiral, and the direction of spiral with
The steering of impeller is identical, and the stator of multi-disc second is provided with the lateral wall of column inner casing, and the second stator includes cambered surface portion and plane
Portion, the plane tangent of one end of the close impeller in cambered surface portion in the radial direction of pump shaft, one end of the remote impeller in cambered surface portion
Axis of the surface parallel to pump shaft so that liquid can flow after being thrown away from the outlet end of impeller along the first stator, due to first
The one end of stator away from impeller is more than the external diameter of column inner casing to the ultimate range of the axis of pump shaft, therefore the first stator is away from leaf
One end of wheel is separated with column inner casing, when liquid runs down the first stator spiral is moved to end of first stator away from impeller,
Axial direction flowing of the form along pump shaft spirally along cambered surface portion is may proceed to, and with the increase of displacement, the stream of liquid
Dynamic direction gradually becomes parallel with pump shaft, finally exports and flows out from pump head.Because liquid is led after being thrown away from impeller first
Leaf effect is lower to be continued helically to flow, and the direction of motion of liquid gradually is changed into the helical flow along pump shaft axial direction, finally
It is changed into streamlined flow in the presence of planar portions, reduces the impact that liquid is produced to cylindrical shell, so as to reduces the latent liquid of LNG
The vibrations of pump, improve the efficiency of LNG immersed pumps.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of external structure schematic diagram of pump head device provided in an embodiment of the present invention；
Fig. 2 is a kind of internal structure schematic diagram of pump head device provided in an embodiment of the present invention；
Fig. 3 is a kind of upward view of column inner casing provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation of pump head device provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of external structure schematic diagram of pump head device provided in an embodiment of the present invention.As shown in figure 1, the pump head
Device includes cylindrical shell 10, column inner casing 20.
Fig. 2 is a kind of internal structure schematic diagram of pump head device provided in an embodiment of the present invention, as shown in Fig. 2 the pump head
Device also includes pump shaft 30 and impeller 40.One end of cylindrical shell 10 is provided with pump head entrance 10a, and the other end of cylindrical shell 10 is set
There is pump head to export 10b, column inner casing 20 is co-axially located in cylindrical shell 10, the outer wall of column inner casing 20 and cylindrical shell 10
Pump head entrance 10a is communicated between inwall and pump head exports 10b water conservancy diversion gap 10c.
Pump shaft 30 is rotationally coaxially plugged on column inner casing 20, and the first end of pump shaft 30 is located at outside column inner casing 20,
Second end of pump shaft 30 is located in column inner casing 20.Impeller 40 is co-axially located in the first end of pump shaft 30, and impeller 40 enters
Liquid is rectified to pump head entrance 10a.
Fig. 3 is a kind of upward view of column inner casing provided in an embodiment of the present invention.As shown in figure 3, column inner casing 20 is leaned on
It is provided with one end of nearly impeller 40 centered on impeller 40, the first stator 51 stretched out in the shape of a spiral, and the side of spiral
Identical to the steering with impeller 40, the first stator 51 has multi-disc, and the first stator of multi-disc 51 is arranged around the circumferential array of pump shaft 30.First
The one end of stator 51 away from impeller 40 is more than the external diameter of column inner casing 20 to the ultimate range of the axis of pump shaft 30.
Fig. 4 is a kind of structural representation of pump head device provided in an embodiment of the present invention, for convenience of description, in Fig. 4
Except cylindrical shell 10.As shown in figure 4, being provided with the second stator of multi-disc 52 on the lateral wall of column inner casing 20, multi-disc second is led
Leaf 52 is arranged around the circumferential array of pump shaft 30.Second stator 52 includes the cambered surface portion 521 extended along camber line and the axis along pump shaft 30
The planar portions 522 of extension, the plane tangent of one end of the close impeller 40 in cambered surface portion 521 is in the radial direction of pump shaft 30, cambered surface
The surface of one end of the remote impeller 40 in portion 521 is parallel to the axis of pump shaft 30, the remote leaf in planar portions 522 and cambered surface portion 521
One end connection of wheel 40.
Pump head device operationally, can connect the rotating shaft transmission of pump shaft and motor.
The embodiment of the present invention makes the outer wall and column of column inner casing by the way that column inner casing is co-axially located in cylindrical shell
The water conservancy diversion gap of connection pump head entrance and pump head outlet is formed between the inwall of shell, by the way that pump shaft is plugged in into column inner casing
On, impeller, the liquid feeding end faces toward pump head entrance of impeller, so as to by controlling impeller to rotate, from pump head are set on pump shaft
Entrance sucks liquid, and is thrown away from the outlet end of impeller.Due to being provided with one end of the close impeller of column inner casing with impeller
Centered on, the first stator stretched out in the shape of a spiral, and the direction of spiral and the steering of impeller are identical, the outside of column inner casing
The stator of multi-disc second is provided with wall, the second stator includes cambered surface portion and planar portions, the table of one end of the close impeller in cambered surface portion
Face is tangential on the radial direction of pump shaft, the axis of the surface of one end of the remote impeller in cambered surface portion parallel to pump shaft so that liquid
It can be flowed after being thrown away from the outlet end of impeller along the first stator, due to the axis of the one end of the first stator away from impeller to pump shaft
Ultimate range be more than the external diameter of column inner casing, therefore the one end of the first stator away from impeller separates with column inner casing, and liquid is suitable
When the first stator spiral and being moved to end of first stator away from impeller, the form spirally along cambered surface portion may proceed to
Flowed along the axial direction of pump shaft, and with the increase of displacement, the flow direction of liquid gradually becomes parallel with pump shaft, finally from
Pump head outlet outflow.Because liquid is continuing helically to flow after throwing away from impeller under the effect of the first stator, and gradually will
The direction of motion of liquid is changed into the helical flow along pump shaft axial direction, is finally changed into streamlined flow in the presence of planar portions, drops
The impact that low liquid is produced to cylindrical shell, so as to reduce the vibrations of LNG immersed pumps, improves the efficiency of LNG immersed pumps.
When realizing, column inner casing 20 can include internal layer shell 201 and outer casing 202, and outer casing 202 is sleeved on interior
Outside layer housing 201, the first stator 51 and the second stator 52 can be arranged on outer casing 202, and the first stator 51 and second is led
Leaf 52 can be integrated component with outer casing 202, so in processing, can be carried out in order to the surface of external layer housing 202
Finishing, and internal layer shell 201 can be then processed using the relatively low machining accuracy of opposed outer layer housing 202, be added with reducing
Work cost.
As shown in Fig. 2 pump shaft 30 can be arranged on column inner casing 20 by deep groove ball bearing 303.LNG immersed pumps are in work
When making, certain axial force can be produced on pump shaft 30, deep groove ball bearing 303 can bear certain axial load, make pump shaft 30
Can be with smooth rotation.
When realizing, deep groove ball bearing 303 is low temperature resistant bearing, to adapt to low temperature LNG environment.Deep groove ball bearing 303 it is interior
Circle and outer ring can be made of stainless steel material, and the ball of deep groove ball bearing 303 can be made of the ceramic material of insulation.
Specifically, the bearing block for installing deep groove ball bearing 303, deep groove ball bearing can be provided with column inner casing 20
303 are arranged in bearing block, and end ring 304 can also be set on pump shaft 30,
It can be provided with pump shaft 30 on the shaft shoulder 301, pump shaft 30 and be arranged with back-up ring 302, impeller 40 is installed in the shaft shoulder
Between 301 and back-up ring 302, impeller 40 is fixed by the cooperation of the shaft shoulder 301 and spacing back-up ring 302, can tearing open in order to impeller 40
Unload and install.Impeller 40 can be circumferentially spacing by flat key when realizing, impeller 40 is rotated together with pump shaft 30.
Preferably, pump head device can also include inducer 60, and inducer 60 is co-axially located on pump shaft 30, and inducer
60 are located at pump head entrance 10a.When being worked by setting inducer 60 to improve LNG immersed pumps, to liquid at pump head entrance 10a
The attraction of body.
Preferably, the first wear ring 71, the liquid feeding end of impeller 40 can be provided with the pump head entrance 10a of cylindrical shell 10
In the first wear ring 71, and the liquid feeding end of impeller 40 and the gap of the first wear ring 71 coordinate.By setting the first wear ring
71 can be conducive to reducing the gap between the cylindrical shell 10 at impeller 40 and pump head entrance 10a, while impeller can be reduced
Abrasion between 40 and cylindrical shell 10.
When realizing, the gap between the liquid feeding end of impeller 40 and the first wear ring 71 can be 0.2mm~0.3mm, preferably
For 0.25mm, to reduce the leakage of the gap location between the liquid feeding end of impeller 40 and the first wear ring 71.
As shown in Fig. 2 cylindrical shell 10 can be provided with cylinder shape groove 20a close to the surface of impeller 40, cylinder is recessed
The second wear ring 72 can be provided with groove 20a side wall, impeller 40 is provided with and impeller 40 close to the surface of cylindrical shell 10
Coaxial bulge loop 41, bulge loop 41 is arranged in the second wear ring 72, and the gap of 41 and second wear ring of bulge loop 72 coordinates.By setting
Second wear ring 72 can reduce the friction between impeller 40 and column inner casing 20.
Preferably, gimbal 73 can be provided with the surface of column inner casing 20, gimbal 73 is located at the He of column inner casing 20
Between impeller 40, gimbal 73 is coaxially disposed with pump shaft 30, and equilibrium gap is set between the inwall and pump shaft 30 of gimbal 73
73a, equilibrium gap 73a and cylindrical shell 10 ft connection.During pump shaft 30 is rotated, because impeller 40 is close to entering
The pressure on the surface at liquid end and the pressure on the surface of the close column inner casing 20 of impeller 40 are unequal, when the close feed liquor of impeller 40
When the pressure on the surface at end is larger, impeller 40 is moved to close to the side of column inner casing 20, between gimbal 73 and impeller 40 between
Gap is gradually reduced, and the liquid for the outside that the equilibrium gap 73a between gimbal 73 and pump shaft 30 flows to cylindrical shell 10 subtracts
It is few, the pressure rise in gap between impeller 40 and column inner casing 20, the pressure of balance impeller 40 both sides, gimbal when realizing
73 can be bolted on column inner casing 20.
Specifically, it can be provided with cylindrical shell 10 in catheter 10d, column inner casing 20 and be provided with balanced loop, balance
Circuit communication equilibrium gap 73a and catheter 10d, catheter 10d and cylindrical shell 10 ft connection, so that equilibrium gap
Liquid in 73a is flowed to outside pump.
Wherein, balanced loop can be the passage that can lead to for fluid stream in column inner casing 20, including deep groove ball bearing 303
The gap between gap, deep groove ball bearing 303 and column inner casing 20 between pump shaft 30, the Shang Ge mechanisms of deep groove ball bearing 303
Between gap, pump shaft 30 and column inner casing 20 between gap, the internal cavities of column inner casing 20.
Catheter 10d can be provided in external pipe on cylindrical shell 10 or straight by the technique such as drill
It is connected on the pipeline opened up on cylindrical shell 10.
Multiple rollers 81 can be provided with referring to Fig. 2, on the lateral wall of cylindrical shell 10, multiple rollers 81 are along cylindrical shell
10 circumferentially, axis co-planar of each roller 81 with cylindrical shell 10.By setting roller 81 can be in order to by pump head
Device is placed into container, the interior or taking-up out of container.
Further, suspension ring 82 are additionally provided with the lateral wall of cylindrical shell 10.Pump head can be facilitated to fill by suspension ring 82
The handling put.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of pump head device, it is characterised in that the pump head device includes cylindrical shell (10), column inner casing (20), pump shaft
(30) and impeller (40), one end of the cylindrical shell (10) is provided with pump head entrance (10a), the cylindrical shell (10) it is another
End is co-axially located in the cylindrical shell (10) provided with pump head outlet (10b), the column inner casing (20), the column inner casing
(20) the pump head entrance (10a) and pump head outlet are communicated between outer wall and the inwall of the cylindrical shell (10)
The water conservancy diversion gap (10c) of (10b), the pump shaft (30) is rotationally coaxially plugged on the column inner casing (20), the pump
The first end of axle (30) is located at the column inner casing (20) outside, and the second end of the pump shaft (30) is located at the column inner casing (20)
Interior, the impeller (40) is co-axially located in the first end of the pump shaft (30), and the feed liquor of the impeller (40) is rectified to institute
State and be provided with pump head entrance (10a), one end of the close impeller (40) of the column inner casing (20) with the impeller
(40) centered on, the first stator (51) stretched out in the shape of a spiral, and the direction of spiral and the steering phase of the impeller (40)
Together, first stator (51) has multi-disc, and the first stator (51) described in multi-disc is arranged around the pump shaft (30) circumferential array, described
The one end of first stator (51) away from the impeller (40) is more than the column to the ultimate range of the axis of the pump shaft (30)
The stator of multi-disc second (52), the multi-disc second are provided with the external diameter of inner casing (20), the lateral wall of the column inner casing (20)
Stator (52) arranges that second stator (52) includes the cambered surface portion extended along camber line around the pump shaft (30) circumferential array
(521) planar portions (522) of the axis extension and along the pump shaft (30), the close impeller of the cambered surface portion (521)
(40) plane tangent of one end is in the radial direction of the pump shaft (30), the remote impeller of the cambered surface portion (521)
(40) surface of one end is parallel to the axis of the pump shaft (30), and the planar portions (522) are remote with the cambered surface portion (521)
One end from the impeller (40) is connected.
2. pump head device according to claim 1, it is characterised in that the pump head device also includes inducer (60), institute
Inducer (60) is stated to be co-axially located on the pump shaft (30), and the inducer (60) is located at pump head entrance (10a) place.
3. pump head device according to claim 1, it is characterised in that the pump head entrance (10a) of the cylindrical shell (10)
Place is provided with the first wear ring (71), and the liquid feeding end of the impeller (40) is located in first wear ring (71), and the leaf
The liquid feeding end and the first wear ring (71) gap for taking turns (40) coordinate.
4. pump head device according to claim 3, it is characterised in that be provided with the surface of the column inner casing (20) flat
Weigh ring (73), and the gimbal (73) is located between the column inner casing (20) and the impeller (40), the gimbal (73)
It is coaxially disposed with the pump shaft (30), equilibrium gap is set between the inwall and the pump shaft (30) of the gimbal (73)
(73a), the equilibrium gap (73a) and the ft connection of the cylindrical shell (10).
5. pump head device according to claim 4, it is characterised in that be provided with catheter in the cylindrical shell (10)
Balanced loop is provided with (10d), the column inner casing (20), the balanced loop connects the equilibrium gap (73a) and described
Catheter (10d), the catheter (10d) and the ft connection of the cylindrical shell (10).
6. pump head device according to claim 1, it is characterised in that the cylindrical shell (10) is close to the impeller (40)
Surface be provided with cylinder shape groove (20a), the side wall of the cylinder shape groove (20a) and be provided with the second wear ring (72),
The impeller (40) is provided with the bulge loop (41) coaxial with the impeller (40) close to the surface of the cylindrical shell (10), described
Bulge loop (41) is arranged in second wear ring (72), and the bulge loop (41) coordinates with the second wear ring (72) gap.
7. the pump head device according to any one of claim 1~6, it is characterised in that the pump shaft (30) passes through deep-groove ball
Bearing (303) is arranged on the column inner casing (20).
8. the pump head device according to any one of claim 1~6, it is characterised in that the outside of the cylindrical shell (10)
Be provided with multiple rollers (81) on wall, the multiple roller (81) along the cylindrical shell (10) circumferentially, it is each described
Axis co-planar of the roller (81) with the cylindrical shell (10).
9. the pump head device according to any one of claim 1~6, it is characterised in that the outside of the cylindrical shell (10)
Suspension ring (82) are provided with wall.
10. the pump head device according to any one of claim 1~6, it is characterised in that be provided with axle on the pump shaft (30)
Back-up ring (302) is arranged with shoulder (301), the pump shaft (30), the impeller (40) is installed in the shaft shoulder (301) and institute
State between back-up ring (302).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710425031.5A CN107218251A (en) | 2017-06-06 | 2017-06-06 | A kind of pump head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710425031.5A CN107218251A (en) | 2017-06-06 | 2017-06-06 | A kind of pump head device |
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| Publication Number | Publication Date |
|---|---|
| CN107218251A true CN107218251A (en) | 2017-09-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710425031.5A Pending CN107218251A (en) | 2017-06-06 | 2017-06-06 | A kind of pump head device |
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| CN (1) | CN107218251A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026722A (en) * | 2018-08-13 | 2018-12-18 | 苏州横海信息科技有限公司 | A kind of LNG immersed pump |
| CN109026754A (en) * | 2018-08-24 | 2018-12-18 | 武汉船用机械有限责任公司 | A kind of pump head device |
| CN112204263A (en) * | 2019-03-06 | 2021-01-08 | 氟技 | Pump case reaches magnetic drive pump including it |
| CN114198341A (en) * | 2021-10-22 | 2022-03-18 | 浙江泰福泵业股份有限公司 | Water-cooling permanent magnet canned motor pump |
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| GB2442321A (en) * | 2006-09-28 | 2008-04-02 | Snecma | Diffuser for a suction pump |
| US8240976B1 (en) * | 2009-03-18 | 2012-08-14 | Ebara International Corp. | Methods and apparatus for centrifugal pumps utilizing head curve |
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| CN109026754A (en) * | 2018-08-24 | 2018-12-18 | 武汉船用机械有限责任公司 | A kind of pump head device |
| CN112204263A (en) * | 2019-03-06 | 2021-01-08 | 氟技 | Pump case reaches magnetic drive pump including it |
| CN114198341A (en) * | 2021-10-22 | 2022-03-18 | 浙江泰福泵业股份有限公司 | Water-cooling permanent magnet canned motor pump |
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