CN201144858Y - Novel seal ring for centrifugal pump - Google Patents

Novel seal ring for centrifugal pump Download PDF

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Publication number
CN201144858Y
CN201144858Y CNU2007201334344U CN200720133434U CN201144858Y CN 201144858 Y CN201144858 Y CN 201144858Y CN U2007201334344 U CNU2007201334344 U CN U2007201334344U CN 200720133434 U CN200720133434 U CN 200720133434U CN 201144858 Y CN201144858 Y CN 201144858Y
Authority
CN
China
Prior art keywords
ring
centrifugal pump
seal ring
impeller
inner ring
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
CNU2007201334344U
Other languages
Chinese (zh)
Inventor
程效锐
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.)
Lanzhou University of Technology
Original Assignee
Lanzhou University of Technology
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 Lanzhou University of Technology filed Critical Lanzhou University of Technology
Priority to CNU2007201334344U priority Critical patent/CN201144858Y/en
Application granted granted Critical
Publication of CN201144858Y publication Critical patent/CN201144858Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an auxiliary device of a centrifugal pump, in particular to a novel seal ring used in a centrifugal pump. The seal ring mainly comprises an outer ring (1) and an inner ring (2), and is characterized in that: the inner ring (2) consists of a front ring (3) which is divided into two parts in the axial direction of the inner ring as well as a back ring (4); the back ring (4) is provided with a groove at an included angle less than 90 degrees to the rotation direction of an impeller. The inner ring is divided into two parts in axial direction, and the surface of the inner ring adjacent to the high pressure side of the impeller is provided with the groove which is at an included angle less than 90 degrees to the rotation direction of the impeller. When the impeller rotates, a liquid flow opposite to a leakage direction is formed, thereby reducing the speed of the liquid at a gap inlet and the cavitation damage on the seal ring caused by the liquid flow, and prolonging the service life of the seal ring; meanwhile, liquid leakage quantity is also reduced and the volumetric efficiency of a centrifugal pump is increased.

Description

A kind of New Centrifugal Pump seal ring
Technical field
The utility model relates to the auxiliary device of centrifugal pump, relates in particular to a kind of New Centrifugal Pump seal ring.
Background technique
Disclosed centrifugal pump seal ring (also claiming choma) in the prior art, its outer shroud is fixed on the housing of pump, and interior ring is fixed on the rotary blade ingress of pump, and the gap by outer shroud and interior ring seals.Because the flow at high speed of liquid stream easily causes the cavitation damage of seal ring in the gap, thereby cause the increase of seal clearance increasing and pump volumetric loss, finally make the efficient of pump reduce, more obvious for the high-lift centrifugal pump performance especially is so the life-span of seal ring is shorter.
Summary of the invention
The purpose of this utility model is to provide a kind of sealing ring for centrifugal pump at defective of the prior art, thereby has effectively overcome the problem of the described existence of background technique.
The technological scheme that its technical problem that solves the utility model adopts is: described a kind of New Centrifugal Pump seal ring, mainly include outer shroud 1 and interior ring 2, its characteristics are: in described ring 2 by axially be divided into along it two-part before ring 3 and back ring 4 forms, back ring 4 is provided with angle with the impeller sense of rotation less than 90 grooves of spending.
The utility model is compared with background technique, the useful effect that has is: described a kind of New Centrifugal Pump seal ring, ring is divided into two parts vertically in it, ring surface fluting on high-tension side near impeller, and the angle of groove of being opened and impeller sense of rotation is less than 90 degree.When impeller can form the liquid stream opposite with leaking direction when rotated, thereby reduced the liquid velocity of ingress, gap, alleviated the cavitation damage of liquid stream, prolonged the working life of seal ring seal ring, also reduce simultaneously the leakage rate of liquid, improved the volumetric efficiency of centrifugal pump.
Description of drawings
Fig. 1 is a structural representation sectional view of the present utility model;
Fig. 2 is the local enlarged diagram of the groove on the back ring 4 among Fig. 1.
In the accompanying drawing: 1. outer shroud, 2. in ring, 3. before ring, 4. back ring.
Embodiment
As shown in Figure 1, described a kind of New Centrifugal Pump seal ring, mainly include outer shroud 1 and interior ring 2, its characteristics are: in described ring 2 by axially be divided into along it two-part before ring 3 and back ring 4 forms, back ring 4 is provided with angle with the impeller sense of rotation less than 90 grooves of spending.It in force, interior ring 2 is installed in the impeller end, ring 3 is installed in front end wherein, back ring 4 is installed in the inboard, and outer shroud 1 is installed on the housing of centrifugal pump, makes impeller can form the liquid stream opposite with leaking direction when rotated, thereby reduced the liquid velocity of ingress, gap, alleviated the cavitation damage of liquid stream, prolonged the working life of seal ring, also reduced the leakage rate of liquid simultaneously seal ring.

Claims (1)

1, a kind of New Centrifugal Pump seal ring, comprise outer shroud (1) and interior ring (2), it is characterized in that described in ring (2) by axially be divided into along it two-part before ring (3) and back ring (4) forms, the back is encircled (4) and is provided with angle with the impeller sense of rotation less than 90 grooves of spending.
CNU2007201334344U 2007-12-18 2007-12-18 Novel seal ring for centrifugal pump Expired - Fee Related CN201144858Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007201334344U CN201144858Y (en) 2007-12-18 2007-12-18 Novel seal ring for centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007201334344U CN201144858Y (en) 2007-12-18 2007-12-18 Novel seal ring for centrifugal pump

Publications (1)

Publication Number Publication Date
CN201144858Y true CN201144858Y (en) 2008-11-05

Family

ID=40081734

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007201334344U Expired - Fee Related CN201144858Y (en) 2007-12-18 2007-12-18 Novel seal ring for centrifugal pump

Country Status (1)

Country Link
CN (1) CN201144858Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104476600A (en) * 2014-10-31 2015-04-01 柳州市中配橡塑配件制造有限公司 Groove repairing cutter of car special-shaped sealing ring
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 (3)

* 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
CN104476600A (en) * 2014-10-31 2015-04-01 柳州市中配橡塑配件制造有限公司 Groove repairing cutter of car special-shaped sealing ring
CN104476600B (en) * 2014-10-31 2016-06-29 柳州市中配橡塑配件制造有限公司 Automobile special-shaped seal ring repair groove cutter

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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: 20081105

Termination date: 20100118