CN201747666U - Seal ring structure of large flow high-lift double suction pump - Google Patents

Seal ring structure of large flow high-lift double suction pump Download PDF

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Publication number
CN201747666U
CN201747666U CN 201020279545 CN201020279545U CN201747666U CN 201747666 U CN201747666 U CN 201747666U CN 201020279545 CN201020279545 CN 201020279545 CN 201020279545 U CN201020279545 U CN 201020279545U CN 201747666 U CN201747666 U CN 201747666U
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CN
China
Prior art keywords
seal ring
pressure chamber
pump
impeller
ring structure
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.)
Expired - Fee Related
Application number
CN 201020279545
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Chinese (zh)
Inventor
邓帮华
张月瑛
尹卫东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Kaiquan Pump Group Co Ltd
Original Assignee
Shanghai Kaiquan Pump Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Kaiquan Pump Group Co Ltd filed Critical Shanghai Kaiquan Pump Group Co Ltd
Priority to CN 201020279545 priority Critical patent/CN201747666U/en
Application granted granted Critical
Publication of CN201747666U publication Critical patent/CN201747666U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a seal ring structure of a large flow high-lift double suction pump. The seal ring structure comprises a body, wherein the body comprises a seal ring outer circle and a seal ring inner circle; the seal ring outer circle is also provided with two O-shaped rings matched with the matching surfaces of a pump body and a pump cover; and the seal ring inner circle is also provided with at least three labyrinth seal grooves matched with impeller stop mouth positions. The seal ring structure has the following benefits: A. the labyrinth seal grooves well reduce the quantity of liquid leaked from an impeller outlet (a high pressure chamber) back to an impeller inlet (a low pressure chamber), as well as volume loss, is beneficial to improving the efficiency of a pump and well saves energy; B. the O-shaped rings of the outer circle seals water communication between the high pressure chamber and the low pressure chamber of the water pump, and avoids washing and 'washout' caused by impact of liquid flowing from the impeller outlet (the high pressure chamber) to the side of the impeller inlet (the low pressure chamber); and C. the seal ring is easy to manufacture, reliable in installation, low in cost and prolonged in service life.

Description

The seal ring structure of the big high-lift double suction pump of flow
Technical field
The utility model relates to the seal ring of the high-lift double suction pump of a kind of big flow, relates in particular to the structure of sealing ring.
Background technique
The big used seal ring structure of the high-lift double suction pump of flow generally adopts straight simple structure (as shown in Figure 1, figure middle shell 3, impeller 2) in the prior art, and promptly the inside and outside circle of seal ring 1 (12,11) is located to be and faced directly.Pump is on-stream, the high-lift double suction pump of particularly big flow, owing to containing reasons such as solid particle, impeller rock in not in place, the fair wear and tear of processing, the medium, the radial clearance of centrifugal pump impeller choma and seal ring is become greatly, or the phenomenon that seal ring breaks occurs; The high-lift double suction pump of particularly big flow is pumped when containing solid particle in the medium or containing corrosive material, and the direct erosion housing of powerful water hammer " watershed " (being the foundry goods section of cutting apart between suction chamber and the hyperbaric chamber) causes high low pressure chamber string water phenomenon; Then, do not have seal action, cause a large amount of backflows, reduce the actual flow of pump, volumetric loss increases, and makes liquid form vortex at the impeller eye place, makes suction performance not good, and hydraulic loss increases, and efficient reduces.
Summary of the invention
The utility model technical issues that need to address have provided the seal ring structure of the high-lift double suction pump of a kind of big flow, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
The utility model comprises: body; Described body comprises circle in seal ring cylindrical and the seal ring; On described seal ring cylindrical, also be provided with two O shape circles that cooperate with the pump housing and pump cover fitting surface; At least 3 labyrinth seal grooves that cooperate with impeller seam position also are set on the circle in described seal ring;
Described seal groove size is between 5-7mm.
Its seal ring cylindrical (with the pump housing, pump cover fitting surface) is set up two O shape circles, and circle (with cooperation place, impeller seam position) is set up the labyrinth seal groove in the seal ring, and size of labyrinth seal groove (5-7mm) and number (〉=3) are decided according to actual conditions design
Compared with prior art, the beneficial effects of the utility model are: A, labyrinth seal groove have reduced liquid drains back to impeller eye (low-pressure cavity) from impeller outlet (hyperbaric chamber) leakage rate well, reduce volumetric loss, be beneficial to the efficient that improves pump, energy-conservation well; The use of B, its cylindrical O shape circle sealed water pump high low pressure chamber string water, avoided liquid to wash away " erosion " from impeller outlet (hyperbaric chamber) to what the water hammer of impeller eye (low-pressure cavity) side caused; That C, this model utility seal ring are made is simple, it is reliable to install, cost is low, prolonged working life.
Description of drawings
Fig. 1 is a seal ring structure schematic representation of the prior art.
Fig. 2 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
As seen from Figure 2: the utility model comprises: body 1; Described body 1 comprises circle 12 in seal ring cylindrical 11 and the seal ring; On described seal ring cylindrical 11, also be provided with two O shape circles 111 that cooperate with the pump housing and pump cover (not shown) fitting surface; At least 3 labyrinth seal grooves 121 that cooperate with impeller 2 seam positions also are set on the circle 12 in described seal ring;
Described seal groove 121 sizes are between 5-7mm.Among the figure: housing 3.
The utility model is set up two O shape circles at its seal ring cylindrical (with the pump housing, pump cover fitting surface), circle (with cooperation place, impeller seam position) is set up the labyrinth seal groove in the seal ring, and size of labyrinth seal groove (5-7mm) and number (〉=3) are decided according to actual conditions design.
The change of the utility model seal ring structure allows the effect of seal ring become more outstanding, has solved to exist high low pressure chamber string water, radial clearance to leak serious technical problem in the prior art.

Claims (2)

1. the seal ring structure of the high-lift double suction pump of big flow comprises: body; Described body comprises circle in seal ring cylindrical and the seal ring; It is characterized in that: on described seal ring cylindrical, also be provided with two O shape circles that cooperate with the pump housing and pump cover fitting surface; At least 3 labyrinth seal grooves that cooperate with impeller seam position also are set on the circle in described seal ring.
2. the seal ring structure of the high-lift double suction pump of big flow according to claim 1 is characterized in that: described seal groove size is between 5-7mm.
CN 201020279545 2010-08-03 2010-08-03 Seal ring structure of large flow high-lift double suction pump Expired - Fee Related CN201747666U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201020279545 CN201747666U (en) 2010-08-03 2010-08-03 Seal ring structure of large flow high-lift double suction pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201020279545 CN201747666U (en) 2010-08-03 2010-08-03 Seal ring structure of large flow high-lift double suction pump

Publications (1)

Publication Number Publication Date
CN201747666U true CN201747666U (en) 2011-02-16

Family

ID=43582345

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201020279545 Expired - Fee Related CN201747666U (en) 2010-08-03 2010-08-03 Seal ring structure of large flow high-lift double suction pump

Country Status (1)

Country Link
CN (1) CN201747666U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105339674A (en) * 2013-06-27 2016-02-17 株式会社荏原制作所 Corrosion and erosion preventing structure and pump comprising same, and pump manufacturing method and repairing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105339674A (en) * 2013-06-27 2016-02-17 株式会社荏原制作所 Corrosion and erosion preventing structure and pump comprising same, and pump manufacturing method and repairing method

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110216

Termination date: 20130803