CN209483676U

CN209483676U - Centrifugal pump

Info

Publication number: CN209483676U
Application number: CN201920017832.2U
Authority: CN
Inventors: 徐雷雨
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-04
Filing date: 2019-01-04
Publication date: 2019-10-11
Anticipated expiration: 2029-01-04

Abstract

The utility model provides a kind of centrifugal pump, it includes shell, is contained in the intracorporal pump shaft of shell, impeller, the outside of the shell and shell balanced with the connected setting of the shell are set, and pump shaft has across the shell and extends to the extended segment for the balanced chamber that the balanced enclosure interior is formed；It is contained in that the equilibrium is intracavitary and permanent magnetic portion relative to the balanced shell fixed setting, and is contained in the intracavitary repulsion portion of equilibrium, the repulsion portion is configured to cooperate relative to the magnetic repulsion of the permanent magnetic portion, to drive the pump shaft axial movement.Centrifugal pump described in the utility model, pass through the configuration active force between permanent magnetic portion and repulsion portion, finally to apply axial active force to pump shaft, and then the frictional dissipation of balancing frame, balance interannular during pump shaft axial float is reduced, improves the stability of centrifugation pump operation.

Description

Centrifugal pump

Technical field

The utility model relates to water conveying technology field, in particular to a kind of centrifugal pump.

Background technique

Include mainly the pump housing, pump shaft and impeller in the structure of existing centrifugal multistage pump multiple centrifugal pump, for balanced axial force, from On the pump shaft of heart pump, it is usually arranged with balancing frame seat and balancing frame, balancing frame inner wall is fixedly connected with pump shaft, outer wall and balancing frame Seat is flexibly connected, and one end is connected with impeller, and balancing frame seat is fixedly connected with pump housing back segment, is made between balancing frame seat and balancing frame Fluid gap is formed, when fluid passes through the fluid gap between balancing frame seat and balancing frame, due to balancing frame and balancing frame seat Between relative motion, make to form water ring between fluid gap, have the function that dynamic sealing, lead to fluid pressure drop, make Formation balancing frame cavity of resorption pressure be greater than epicoele pressure, by impeller generate most of axial force be balanced.Such knot Structure setting so that centrifugal pump operate when, due to when the axial force that impeller generates be greater than balancing frame on axial force when, pump axial pump Way in is mobile, reduces the gap between balancing frame and balance ring, and resistance when at this moment highly pressurised liquid passes through gap increases, Leakage rate reduces, and increases the pressure between balancing frame and balance ring, increases the equilibrant force on balancing frame, until equilibrant force and Axial force is equal.Axial gap remains unchanged.Otherwise when axial force is less than equilibrant force, pump shaft moves right, and gap increases, high Press liquid leakage rate increases, and the pressure decline between balancing frame and balance ring, the equilibrant force acted on balancing frame reduces, until Until equal with the axial force generated on impeller, axial gap is kept to run under certain interval.

Have the advantages that automatically balancing axial force by can be seen that balancing frame device as described above, but also has and hold Feature easy to wear.If balancing frame device go wrong will will lead to pump occur efficiency decline, vibration, supercurrent, power output not The problems such as sufficient, the serious pump that will will lead to cannot be run.It is just led since many maintenance personals not quite understand balancing frame device The pump of many problems is caused to occur repairing repeatedly, this not only increases maintenance cost, serious also to will lead to equipment halt production.

Utility model content

In view of this, the utility model is directed to a kind of centrifugal pump, the abrasion of balancing frame can be reduced, improve entire It is centrifuged the stability of pump operation.

In order to achieve the above objectives, the technical solution of the utility model is achieved in that

A kind of centrifugal pump, including shell are contained in the pump shaft in the shell to rotate around own axes as axis, installation Impeller on the pump shaft, further includes:

Balanced shell, be arranged in the outside of the shell and with the shell be connected setting, the pump shaft have across institute It states shell and extends to the extended segment for the balanced chamber that the balanced enclosure interior is formed；

It is intracavitary and be fixedly installed relative to the balanced shell to be contained in the equilibrium for permanent magnetic portion；

Repulsion portion, it is intracavitary that the repulsion portion is contained in the equilibrium, and constitutes and be connected with the extended segment；The repulsion portion It is configured to cooperate relative to the magnetic repulsion of the permanent magnetic portion, to drive the pump shaft to move axially.

Further, the permanent magnetic portion is fixed on that equilibrium close to the shell is intracavitary, and the extended segment is slided and worn Cross the permanent magnetic portion；The repulsion portion is fixed on the free end of the extended segment.

Further, be fixed with mounting plate on the free end of the extended segment Yu Suoshu, the repulsion portion recline be connected in it is described On mounting plate.

Further, the permanent magnetic portion is configured to be fixed on intracorporal first magnet of the balanced shell, the repulsion portion Be configured to repel each other with the first magnet magnetic force the second magnet of setting.

Further, it is equipped with hyalomere in the balanced shell, to constitute showing for the extended segment.

Further, Yu Suoshu hyalomere is equipped with scale.

Further, trimming part is fixed in the equilibrium is intracavitary, the trimming part is configured to and the repulsion portion Spacing setting, and assign repulsion portion attraction.

Further, the trimming part includes that the adjustable fixed plate of balanced intracavitary and along pump shaft axial position is arranged in, And it is installed on the third magnet in the fixed plate to be arranged with repulsion portion magnetic.

Further, it between Yu Suoshu trimming part and the balanced inner walls, is equipped with and guides the trimming part in described The guide portion of balanced intracavitary sliding.

Further, the guide portion include be formed in it is in the balanced inner walls, prolong along the axial direction of the pump shaft The sliding slot of setting is stretched, and is connected in the fixed plate and slides the protrusion in the sliding slot.

Compared with the existing technology, the utility model has the advantage that

Centrifugal pump described in the utility model, by the configuration active force between permanent magnetic portion and repulsion portion, finally to pump Axis applies axial active force, and then reduces the frictional dissipation of balancing frame, balance interannular during pump shaft axial float, improves It is centrifuged the stability of pump operation.

Detailed description of the invention

The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.? In attached drawing:

Fig. 1 is the partial structure diagram of centrifugal pump described in the utility model embodiment；

Fig. 2 is the partial enlargement structural representation in the portion A in Fig. 1；

Description of symbols:

In figure, 1- balance ring；2- pumps out section；3- balancing frame, 4- pump shaft；5- bearing；6- equilibrium shell；601- sliding slot；7- Mounting plate, 8- hyalomere；9- third magnet；10- gland；11- screw rod；12- fixed plate, 1201- protrusion；The second magnet of 13-； The first magnet of 14-；15- shell, 16- impeller；17- backing plate.

Specific embodiment

It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can To be combined with each other.

The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

The utility model relates to a kind of centrifugal pump, main design philosophy, be by adding permanent magnetic portion and repulsion portion, To apply assistance force to pump shaft, and then the frictional dissipation of balancing frame, balance interannular during pump shaft axial float is reduced, mentioned The high stability of centrifugation pump operation.

In order to highlight the innovation improvement of the utility model, Fig. 1 illustrates only the part knot of the present embodiment centrifugal pump Structure, centrifugal pump main structure is similar to existing centrifugal pump structure, for example including shell 15 shown in FIG. 1, is contained in shell Pump shaft 4 in 15 to be rotated around own axes as axis, the impeller 16 being installed on the pump shaft 4, the pump shaft 4 in shell 15 On, equipped with balance ring 1 and the balancing frame being equipped with balance ring 13, between impeller 16 and balance ring 1, it is equipped with water flow What is pumped out pumps out section 2.Structure as described above is all made of existing structure, and details are not described herein, and the present embodiment is as improvement The permanent magnetic portion at place and repulsion portion are housed in balanced shell 6.As shown in Figure 1, balanced shell 6 is fixed on figure in a manner of being connected The right end of the shell 15 of state shown in 1, is inside formed with balanced chamber, and in order to cover the right end of balanced chamber, gland 10 is as equal The component part of weighing apparatus shell 6, is sealed on balanced chamber, so that balanced chamber forms closed environment.

Pump shaft 4 is balanced intracavitary by being pierced by and extending in shell 15, so that pump shaft 4 is located at balanced intracavitary part and constitutes pump The extended segment of axis 4.In order to ensure the stability that pump shaft 4 rotates, place is passed through in the pump shaft 4 of shell 15, is fixed with bearing 5, pump shaft 4 It is rotatably assorted by the bearing 5 of suit thereon and the composition of shell 15.

On being located at balanced intracavitary, close to shell 15 extended segment, sliding sleeve is equipped with permanent magnetic portion, meanwhile, the permanent magnetic portion It is fixed on balanced intracavitary.In the present embodiment, permanent magnetic portion uses the first magnet 14, in order to realize the first magnet 14 in balanced intracavitary It being fixedly mounted, balanced shell 6 has the mounting base to balanced intracavitary extension, the mounting base and extended segment clearance fit, meanwhile, Reclining in mounting base has backing plate 17, and the first magnet 14 and backing plate 17 are connected in mounting base commonly through bolt, meanwhile, backing plate 17 Clearance fit is constituted with extended segment with the first magnet 14, so that pump shaft can be slided relative to the first magnet 14, backing plate 17.

Setting based on permanent magnetic portion, the repulsion portion in the present embodiment are configured to the setting that repels each other with 14 magnetic force of the first magnet Second magnet 13.In order to be fixed on the second magnet 13 on extended segment, in the present embodiment, in extended segment free end, it is fixed with Mounting plate 7, the second magnet 13 are connected on mounting plate 7 by bolt.In order to realize between the first magnet 14 and the second magnet 13 Magnetic repulsion cooperation, only the magnetic pole of 13 opposite face of the first magnet 14 and the second magnet need to be set as identical.

For the ease of observing the case where extended segment, Yu Junheng shell 6 is equipped with hyalomere 8, to constitute extended segment Show.In addition, can be set on hyalomere in order to which the case where further variation to the shaft clearance of extended segment shows There is scale.

In addition, improving pump shaft 4 to further improve the first magnet and the second magnet to the function and effect of pump shaft 4 Stability, in the present embodiment, in it is balanced it is intracavitary be fixed with trimming part, which is configured to set with repulsion portion spacing It sets, and assigns repulsion portion attraction.Specifically, as shown in Figure 1, trimming part is intracavitary in equilibrium including setting and along pump shaft The adjustable fixed plate 12 of axial position, and be installed in fixed plate 12 by bolt to be arranged with repulsion portion magnetic Third magnet 9.

In order to realize that fixed plate 12 is adjustable in balanced intracavitary axial position, in the present embodiment, it is interspersed on gland 10 Screw rod 11, threaded portion and 12 screw thread of fixed plate of screw rod 11 are screwed on.The head of screw rod 11 is positioned relative to gland 10 to be arranged, i.e. spiral shell Axial position between the head and gland 10 of bar 11 remains unchanged, when rotary screw 11, due to screw rod 11 and fixed plate 12 Between be threadedly engaged, fixed plate 12 can be driven to drive third magnet 9 in balanced intracavitary axial movement, to change third magnet 9 and the second spacing between magnet 13.It can be seen that in the process based on this structure, it is to be ensured that fixed plate 12 is not able to rotate, Therefore, it in the present embodiment, between trimming part and balanced inner walls, is equipped with and guides the trimming part in the intracavitary cunning of equilibrium Dynamic guide portion.Specifically, as shown in connection with fig. 2 by Fig. 1, in the present embodiment, guide portion includes being formed in balanced inner walls On, the sliding slot 601 of axially extending setting along pump shaft 4, and be connected in fixed plate 12 and slide in sliding slot 601 Protrusion 1201.The setting of sliding slot 601 can provide a limit basis to fixed plate 12 during rotary screw 11, The rotation for inhibiting fixed plate 12, meanwhile, it is capable to which the axial movement for fixed plate 12 provides guiding in trim process.

When in use, by rotary screw 11, the distance between third magnet 9 and the second magnet 13 can be adjusted, to adjust Magnetic force between whole third magnet 9 and the second magnet 13, in such manner, it is possible to be played to the movement of the second magnet 13 preferably auxiliary Effect is helped, the frictional dissipation of balancing frame, balance interannular during pump shaft axial float is further decreased, improves centrifugation pump operation Stability.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims

1. a kind of centrifugal pump, including shell are contained in the pump shaft in the shell to rotate around own axes as axis, are installed on Impeller on the pump shaft, it is characterised in that further include:

Balanced shell, be arranged in the outside of the shell and with the shell be connected setting, the pump shaft have across the shell Body and the extended segment for extending to the balanced chamber that the balanced enclosure interior is formed；

Repulsion portion, it is intracavitary that the repulsion portion is contained in the equilibrium, and constitutes and be connected with the extended segment；The repulsion portion is by structure The magnetic repulsion relative to the permanent magnetic portion is caused to cooperate, to drive the pump shaft to move axially.

2. centrifugal pump according to claim 1, it is characterised in that: the permanent magnetic portion is fixed on close to the described of the shell Balanced intracavitary, the extended segment slides through the permanent magnetic portion；The repulsion portion is fixed on the free end of the extended segment.

3. centrifugal pump according to claim 2, it is characterised in that: be fixed with installation on the free end of the extended segment Yu Suoshu Plate, the repulsion portion, which reclines, to be connected on the mounting plate.

4. centrifugal pump according to claim 1, it is characterised in that: the permanent magnetic portion is configured to be fixed on the balanced shell Intracorporal first magnet, the repulsion portion are configured to repel each other with the first magnet magnetic force the second magnet of setting.

5. centrifugal pump according to claim 1, it is characterised in that: hyalomere is equipped in the balanced shell, to constitute The extended segment shows.

6. centrifugal pump according to claim 5, it is characterised in that: Yu Suoshu hyalomere is equipped with scale.

7. centrifugal pump according to any one of claim 1 to 6, it is characterised in that: be fixed in the equilibrium is intracavitary Trimming part, the trimming part is configured to be arranged with repulsion portion spacing, and assigns repulsion portion attraction.

8. centrifugal pump according to claim 7, it is characterised in that: the trimming part is intracavitary in equilibrium including setting and along pump The adjustable fixed plate of the axial position of axis, and it is installed on the third magnetic in the fixed plate to be arranged with repulsion portion magnetic Iron.

9. centrifugal pump according to claim 8, it is characterised in that: Yu Suoshu trimming part and the balanced inner walls it Between, equipped with the guidance trimming part in the guide portion of the intracavitary sliding of equilibrium.

10. centrifugal pump according to claim 9, it is characterised in that: the guide portion includes being formed in the balanced shell The sliding slot of axially extending setting on inner wall, along the pump shaft, and be connected in the fixed plate and slide flush-mounted in institute State the protrusion in sliding slot.