CN201401336Y

CN201401336Y - Axial-thrust balancing centrifugal pump

Info

Publication number: CN201401336Y
Application number: CN2009200136966U
Authority: CN
Inventors: 萧建邦; 徐德富; 林伟光; 任福森; 张士龙
Original assignee: Dandong Kelong Group Co Ltd
Current assignee: Dandong Colossus Group Co Ltd; Dandong Kelong Group Co Ltd
Priority date: 2009-05-13
Filing date: 2009-05-13
Publication date: 2010-02-10
Anticipated expiration: 2019-05-13

Abstract

The utility model provides an axial-thrust balancing centrifugal pump, which comprises a pump body, a pump cover, a pump shaft and an impeller. The axial-thrust balancing centrifugal pump is characterized in that a pressure balancing chamber (D) is arranged between the back side of the impeller (13) and the pump cover, and the self balancing impeller (13) piles the pressure on the pump shaft (12)along axial direction, so that the pump shaft (12) is ensured to bear the minimum axial direction applied force. The axial-thrust balancing centrifugal pump improves pump performance, is safe to be used, and has long service life.

Description

The axial force balance centrifugal pump

Technical field

The utility model relates to centrifugal pump.

Background technique

Centrifugal pump or by outer magnet rotor cooperate with interior magnet rotor drive by magnetic force in magnet rotor rotate, interior magnet rotor drives the magnetic drive pump that pump shaft rotates, the pressure difference of in pump chamber, bearing owing to the impeller left and right sides, so the axial pressure of impeller action on pump shaft is bigger, the axial force balance of pump shaft is bad, and it is big that pump shaft bears axial force, particularly when start, also can produce compression shock, cause the wearing and tearing of pump shaft sliding bearing and thrust button easily.

The model utility content

The purpose of this utility model is to improve at the shortcoming deficiency of above-mentioned prior art, provides a kind of rational in infrastructure, and the pump shaft axial force balance is good, safe and reliable axial force balance centrifugal pump and magnetic drive pump.

The utility model includes the pump housing 1, pump cover 11, pump shaft 12, impeller 13, it is characterized in that: be provided with the supporting disk 4 that cooperates with impeller 13 in pump cover 11 front sides, choma 41 and interior choma 48 outside impeller 13 rear sides are provided with, the fixedly connected outer ring surface that is provided with choma 41 outside friction ring 43 and the impeller 13 is slidingly matched on seam groove 40 inner ring surfaces 42 on supporting disk 4, outside impeller 13, offer radial direction through hole groove a ' on the outer ring surface of choma 41 or friction ring 43 inner ring surfaces, or the friction ring on the supporting disk 4 43 cooperates with impeller 13 outer choma 41 outer ring surface radial clearance a, interior choma 48 front-end faces 48 ' of impeller 13 rear sides cooperate with perpendicular end face axial gap c on the supporting disk 4, make impeller 13 rear sides in,

outer choma

48,41 inner chambers form pressure balance chamber D, during pump work, the pressure in impeller 13 left sides is bigger, impeller 13 produces to the right and moves, the front-end face 48 ' of the interior choma 48 of impeller 13 is diminished with perpendicular end face axial gap c on the supporting disk 4, pressure balance chamber D is reduced and being communicated with of pump chamber low pressure area, (or radial clearance a) communicates with the pump chamber zone of high pressure radial direction through hole groove a ' of pressure balance chamber D by impeller 13 outer choma 41 outer ring surfaces, pressure balance chamber D internal pressure is raise, to impeller 13 enforcement pressure effects to the left, the pressure that impeller 13 left and right side are subjected to tends to balance, thereby reduces the axial force that 13 pairs of pump shafts of impeller 12 produce.

The utility model is rational in infrastructure, 4 of supporting disks on impeller 13 rear sides and the pump cover are provided with the axial force of 13 pairs of pump shafts 12 of pressure balance chamber D autobalance impeller of formation, make pump shaft 12 bear minimum axial force, make the bearing means, particularly thrust button of pump shaft bear axial force and reach minimum, make pump shaft rotate balance more, performance improves, and safe in utilization, adaptive capacity is strong, more suitable high pressure operating mode is used, the working life of having improved pump.

Description of drawings

Fig. 1 is the utility model example structure schematic representation.

Fig. 2 is another example structure schematic representation, i.e. magnetic drive centrifugal pump of the utility model.

Fig. 3 is Fig. 1,2 pressure balance chamber D bilge construction enlarged view.

Embodiment

The utility model includes the pump housing 1, pump cover 11, pump shaft 12, impeller 13, be provided with the supporting disk 14 that cooperates with impeller 13 in pump cover 11 front sides, supporting disk 4 is to fixedly connected with pump cover 11, or one connects, choma 41 and interior choma 48 outside impeller 13 rear sides are provided with, the fixedly connected outer ring surface that is provided with choma 41 outside friction ring 43 and the impeller 13 is slidingly matched on seam groove 40 inner ring surfaces 42 on supporting disk 4, outside impeller 13, offer radial direction through hole groove a ' on the outer ring surface of choma 41 or friction ring 43 inner ring surfaces, or the friction ring on the supporting disk 4 43 cooperates with impeller 13 outer choma 41 outer ring surface radial clearance a, shown in the accompanying drawing embodiment, the fixedly connected disk 45 that is provided with on the seam groove 40 on the supporting disk 4, the perpendicular end face 47 in the bottom of disk 45 cooperates with front-end face 48 ' the axial clearance c of choma 48 in the impeller 13, make in impeller 13 rear sides,

outer choma

48,41 inner chambers form pressure balance chamber D, being provided with of disk 45 is beneficial to supporting disk 4 processing, the matching gap of convenient adjustment and impeller 13, in impeller, offer MEDIA FLOW through hole 13 ' on bottom impeller 13 rear walls of choma 48, during pump work, when the pressure in impeller 13 left sides is big, impeller 13 produces to the right and moves, the cooperating axial clearance c to diminish or seal of the perpendicular end face 47 in bottom that makes disk 45 and impeller 13 interior choma 48 front-end faces 48 ', pressure balance chamber D is reduced or seal being communicated with by opening 13 ' and pump chamber low pressure area, (or radial clearance a) communicates with the pump chamber zone of high pressure pressure balance chamber D by the radial direction through hole groove a ' on friction ring 43 and impeller 13 outer choma 41 outer ring surfaces, pressure balance chamber D internal pressure is raise, to impeller 13 enforcement pressure effects to the left, the pressure that impeller 13 left and right side are subjected to tends to balance, thereby reduces the axial force that 13 pairs of pump shafts of impeller 12 produce.

Whether offering MEDIA FLOW through hole 13 ' in impeller on bottom impeller 13 rear walls of choma 48 decides on choma 48 bilge constructions in the concrete impeller, when having communicated with the pump chamber low pressure area on the lower chamber A of choma in the impeller 48 structure, side need be in impeller not be offered MEDIA FLOW through hole 13 ' on bottom impeller 13 rear walls of choma 48 specially.

Claims

1, the axial force balance centrifugal pump includes the pump housing (1), pump cover (11), pump shaft (12), impeller (13), it is characterized in that: be provided with the supporting disk (4) that cooperates with impeller (13) in pump cover (11) front side, choma (41) and interior choma (48) outside impeller (13) rear side is provided with, seam groove (40) inner ring surface (42) on supporting disk (4) is gone up the fixedly connected outer ring surface that is provided with choma (41) outside friction ring (43) and the impeller (13) and is slidingly matched, outside impeller (13), offer radial direction through hole groove a ' on the outer ring surface of choma (41) or friction ring (43) inner ring surface, or the friction ring (43) on the supporting disk (4) cooperates with the outer choma of impeller (13) (41) outer ring surface radial clearance (a), interior choma (48) front-end faces (48 ') of impeller (13) rear side cooperate with perpendicular end face axial gap (c) on the supporting disk (4), make impeller (13) rear side in, outer choma (48,41) inner chamber forms pressure balance chamber (D); Offer MEDIA FLOW through hole (13 ') on bottom impeller (13) rear wall of choma in impeller (48).

2, axial force balance centrifugal pump according to claim 1 is characterized in that: supporting disk (4) is to fixedly connected with pump cover (11), or one connects.

3, axial force balance centrifugal pump according to claim 1, it is characterized in that: the seam groove (40) on supporting disk (4) is gone up the fixedly connected disk (45) that is provided with, the perpendicular end face (47) in the bottom of disk (45) cooperates with front-end face (the 48 ') axial clearance (c) of the interior choma of impeller (13) (48), makes the inside and outside choma of impeller (13) rear side (48,41) inner chamber form pressure balance chamber (D).

4, according to claim 1 or 2 or 3 described axial force balance centrifugal pumps, it is characterized in that; It is magnetic drive centrifugal pump.