CN201155463Y

CN201155463Y - Axial force balancing device centrifugal pump

Info

Publication number: CN201155463Y
Application number: CNU2008200100103U
Authority: CN
Inventors: 姜万芝
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-03
Filing date: 2008-01-03
Publication date: 2008-11-26
Anticipated expiration: 2018-01-03

Abstract

The utility model relates to a liquid pump, in particular relates to a novel axial-force balancing device centrifugal pump that is a liquid pump that is particularly applicable to the field requiring the centrifugal pump. The liquid pump consists of a pump body of a single-pump, a pump cover or a front section, a middle section and a rear section of a multi-stage pump and an impeller, wherein, a throttling sealing ring is arranged on the corresponding position on the outer circle of a cover plate of the impeller and the pump body, the pump cover of the corresponding position to form a radial gap that reduces the leakage of the medium; a balancing disc and a balancing plate are arranged on the inner circle of the cover plate of the impeller and the corresponding position of the pump body, the pump cover or the rear section to form an axial gap that can adjust the pressure of a balancing chamber. Compared with the prior art, since a series of new technologies such as the axial-force balancing device is adopted, and the axial-force balancing is approved in the test, the liquid pump of the utility model has high pump efficiency, small volume, and low manufacturing cost and running cost.

Description

Novel axial thrust balancing device centrifugal pump

Technical field

The utility model relates to a kind of liquid pump, and particularly a kind of novel axial thrust balancing device centrifugal pump is the liquid pump that needs centrifugal pump place first-selection.

Background technique

Water pump is widely used in industry, agricultural and every field such as civilian, for development national economy had once been brought into play positive effect.But along with developing rapidly of science and technology, combination property to liquid pump requires also more and more higher, yet the axial force balance of centrifugal pump must be provided with back blades or cover of balancing chamber etc. in the past, consequently the volume of pump increases, decrease in efficiency, for these reasons, the axial force balance technology of centrifugal pump has improved necessity in the past.

The model utility content

The utility model is at the technical problem that prior art exists, and provides that a kind of compact structure is reasonable, volume is little, in light weight, novel axial thrust balancing device centrifugal pump that efficient is high.

The technological scheme of the utility model realization goal of the invention is made up of leading portion, stage casing, back segment and the impeller of the pump housing, pump cover or the multistage pump of single-stage pump, position that its described impeller cover cylindrical is corresponding with the pump housing, pump cover or back segment or the throttling seal ring that is provided with respectively at its corresponding position form the radial clearance that reduces leaking medium, the axial clearance of position that circle is corresponding with the pump housing, pump cover or back segment in it or the Balance disc that is provided with respectively at its corresponding position, balance plate formation adjustable and balancing chamber pressure.

Described in multistage pump, can form the radial clearance that reduces leaking medium by the cylindrical that sets up the Balance disc on pump shaft and back segment corresponding position or at the throttling seal ring that its corresponding position is provided with respectively, the axial clearance of position that circle is corresponding with back segment in it or the balance plate formation adjustable and balancing chamber pressure that is provided with in its position.

A small amount of MEDIA FLOW of the last runner of described multi-runner type vane by single-stage pump or the output of the impeller of multistage pump is crossed radial clearance, flows back to the suction side or flows back to leading portion by balance tube by balance cylinder and axial clearance again.

Described balance cylinder pressure can be by axial clearance regulation, when unbalanced axial force promotes rotor to direction motion that axial clearance reduces, leaking medium by axial clearance reduces, and the pressure of balance cylinder increases, when its pressure equates with axial force, rotor reaches balance, in like manner, when unbalanced axial force promotes rotor when the direction of axial clearance increase is moved, by the leaking medium increase of axial clearance, balance cylinder's pressure reduces, and also can make rotor reach balance.

The utility model compared with prior art owing to adopted series of new techniques such as novel axial thrust balancing device, and has axial force balance through evidence, and pump efficiency height, volume be little, obviously reduce manufacture cost and operating cost.

Description of drawings

Fig. 1 is the utility model single-stage double flow channel formula impeller novel axial thrust balancing device centrifugal pump master TV structure schematic representation.

Fig. 2 is the utility model single-stage three flow channel type impeller novel axial thrust balancing device centrifugal pump master TV structure schematic representation.

Fig. 3 is the utility model multi-stage impeller Balance disc integral type novel axial thrust balancing device centrifugal pump master TV structure schematic representation.

Fig. 4 is the multistage local main TV structure schematic representation of balancing disc type novel axial thrust balancing device centrifugal pump that sets up of the utility model.

Among the figure: the pump housing 1, pump cover 2, leading portion 3, stage casing 4, back segment 5, impeller 6, radial clearance 7, balance cylinder 8, axial clearance 9, Balance disc 10, balance tube 11, throttling seal ring 12, balance plate 13, pump shaft 14.

Embodiment

Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, form the radial clearance 7 that reduces leaking mediums as the corresponding position of the cover plate cylindrical of Fig. 1, Fig. 2, Fig. 3, impeller 6 shown in Figure 4 and the pump housing 1, pump cover 2 or back segment 5 or at the throttling seal ring 12 that its corresponding position installs respectively, the axial clearance 9 of position that circle and the pump housing 1 in it, pump cover 2 or back segment 5 are corresponding or the Balance disc 10 that installs respectively at its corresponding position, balance plate formation adjustable and balancing chambers 13 8 pressure.In multistage pump, can form the radial clearance 7 that reduces leaking medium by cylindrical that singly is contained in the Balance disc 10 on the pump shaft 14 and back segment 5 corresponding positions or the throttling seal ring 12 that is packed in its position respectively, the axial clearance 9 of position that circle and back segment 5 are corresponding in it or balance plate formation adjustable and balancing chambers 13 8 pressure that install in its position.

A small amount of MEDIA FLOW of the last runner of the multi-runner type vane 6 of described single-stage pump or 6 outputs of the impeller of multistage pump is crossed radial clearance 7, flows back to the suction side or flows back to leading portion 3 by balance tube 11 by balance cylinder 8 and axial clearance 9 again.When unbalanced axial force promoted rotor to direction motion that axial clearance 9 reduces, the leaking medium by axial clearance 9 reduced, and the pressure of balance cylinder 8 increases, and when its pressure equated with axial force, rotor reached balance.In like manner, when unbalanced axial force promoted rotor to direction motion that axial clearance 9 increases, the leaking medium by axial clearance 9 increased, and balance cylinder's 8 pressure reduce, and also can make rotor reach balance.

Claims

1, novel axial thrust balancing device centrifugal pump, it is the pump housing (1) by single-stage pump, the leading portion (3) of pump cover (2) or multistage pump, stage casing (4), back segment (5) and impeller (6) are formed, it is characterized in that described impeller (6) the cover plate cylindrical and the pump housing (1), the position that pump cover (2) or back segment (5) are corresponding or form the radial clearance (7) that reduces leaking medium, circle and pump housing (1) in it at the throttling seal ring (12) that its corresponding position is provided with respectively, position that pump cover (2) or back segment (5) are corresponding or the Balance disc (10) that is provided with respectively at its corresponding position, balance plate (13) forms the axial clearance (9) of adjustable and balancing chamber (8) pressure.

2, novel axial thrust balancing device centrifugal pump according to claim 1, it is characterized in that in multistage pump, can form the radial clearance (7) that reduces leaking medium by the cylindrical that sets up the Balance disc (10) on pump shaft (14) and back segment (5) corresponding position or at the throttling seal ring (12) that its corresponding position is provided with respectively, the position that circle is corresponding with back segment (5) in it or in the axial clearance (9) of balance plate (13) the formation adjustable and balancing chamber (8) of its position setting pressure.

3, novel axial thrust balancing device centrifugal pump according to claim 1, it is characterized in that crossing radial clearance (7), flow back to the suction side or flow back to leading portion (3) by balance cylinder (8) and axial clearance (9) again by balance tube (11) by a small amount of MEDIA FLOW of impeller (6) output of the last runner of the multi-runner type vane (6) of single-stage pump or multistage pump.

4, novel axial thrust balancing device centrifugal pump according to claim 1, the pressure that it is characterized in that described balance cylinder (8) is regulated by axial clearance (9), when unbalanced axial force promotes rotor to direction motion that axial clearance (9) reduces, leaking medium by axial clearance (9) reduces, the pressure of balance cylinder (8) increases, when its pressure equated with axial force, rotor reached balance.In like manner, when unbalanced axial force promotes rotor when axial clearance (9) augment direction move, by the leaking medium increase of axial clearance (9), balance cylinder (8) pressure reduces, and also can make rotor reach balance.