CN2086335U - Differential pressure seal device of centrifugal pump - Google Patents

Differential pressure seal device of centrifugal pump Download PDF

Info

Publication number
CN2086335U
CN2086335U CN 91211190 CN91211190U CN2086335U CN 2086335 U CN2086335 U CN 2086335U CN 91211190 CN91211190 CN 91211190 CN 91211190 U CN91211190 U CN 91211190U CN 2086335 U CN2086335 U CN 2086335U
Authority
CN
China
Prior art keywords
bowl
spacer
friction disk
motive sealing
rim
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.)
Withdrawn
Application number
CN 91211190
Other languages
Chinese (zh)
Inventor
徐文之
王敬增
夏春生
孙长河
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.)
PETROLEUM MACHINERY PLANT LINGQING CITY
Original Assignee
PETROLEUM MACHINERY PLANT LINGQING CITY
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 PETROLEUM MACHINERY PLANT LINGQING CITY filed Critical PETROLEUM MACHINERY PLANT LINGQING CITY
Priority to CN 91211190 priority Critical patent/CN2086335U/en
Publication of CN2086335U publication Critical patent/CN2086335U/en
Withdrawn legal-status Critical Current

Links

Images

Abstract

The utility model relates to a differential pressure seal device of a centrifugal pump. An outer dynamic seal bowl (13) is sheathed on an adjusting pad (11), is pressed by a clamping pad (12) in the axial direction and is arranged in a cavity (d) of a friction disk (9). The mounting position lies on a pump axle (8) closing up to the back of an impeller (10) in an impeller work chamber. By utilizing the characteristic that the pressure of work media in the impeller work chamber is bigger than that of a pump case, the outer margin of the outer dynamic seal bowl (13) is caused to be expanded to form seal in the working condition, and therefore, the leakage source of the pump is effectively blocked. The seal is reliable, which is extended by 10 times compared with the mechanical seal; the consumption is reduced by 4600 kilowatt-hour each year, the shutdown loss is reduced and the work efficiency is raised.

Description

Differential pressure seal device of centrifugal pump
The utility model relates to the seal arrangement of centrifugal pump.
The seal arrangement of existing centrifugal pump, mainly contain two kinds of forms: a kind of is packing_seal, a kind of is mechanical seal.Packing_seal is to be that the asbestos ring of rectangle is pressed in the friction disk hole with gland with the cross section, to realize the sealing between pump shaft and the friction disk, prevents to leak.This sealing configuration is simple, and is easy to use, is used for clean waterpump and the oil pump effect is pretty good, and then effect is undesirable but be used for impurity centrifugal pump such as sand pump, and the one, produce the wearing and tearing back to leak serious; The 2nd, power consumption is big; The 3rd, the life-span is short, needs often to change, and influences the working efficiency of pump.The sealing of this form sees the U.S. HARRISBURG sand pump that introduce the Zhongyuan Oil Field.Mechanical seal mainly contains compositions such as rotating ring and stationary ring, and rotating ring is the conical surface, forms line with stationary ring and contacts the realization sealing, and rotate with pump shaft.This seal form is used for clean waterpump and oil pump is effective, when being used for impurity centrifugal pumps such as sand pump, because working medium is strong abrasion class fluid mud, in the pump shaft high speed rotating, denude easily, even the valuable wear-resisting cobalt coating of spraying on rotating ring, keeping line contact sealing can be too not of a specified duration yet, only can guarantee effectively work in hundreds of hours, time, the long again wearing and tearing formation face that just takes place contacted, so that poorly sealedly cause leakage, and the scene can't maintain and replace, must enter maintenance shop's laid-up, changes seal arrangement.Keep in repair long in time limitly, expensive big, directly influence work on the spot.The manufacturing process more complicated of this mechanical seal, cost is higher.This sealing is indicated in homemade SB150 molding sand pump.More than the mounting point of two kinds of seal arrangements all stretch out the friction disk end at pump shaft.
The purpose of this utility model is exactly to solve existing seal arrangement wear and leakage, and power consumption is big, problems such as the life-span is short provide a kind of power consumption low, make easy for installation, sealability is reliable, the new type sealing device of the centrifugal pump of long working life (particularly impurity centrifugal pump) usefulness.
Task of the present utility model is finished like this: according to the structural principle of centrifugal pump, change existing seal arrangement and be installed on the position that pump shaft stretches out the friction disk end, seal arrangement is arranged on place, internal leakage source, impeller working room, adopt the pressure difference principle, design a kind of differential seal arrangement, utilize working medium in the impeller working room (drilling fluid, the severe mortar etc.) characteristic that pressure ratio pump case pressure outside is big, make seal arrangement stop the source of leaks of pump in working order effectively, realize sealing.According to such design, design a kind of centrifugal pump seal arrangement, by friction disk (9), spacer (11), outer motive sealing bowl (13), clamping pad (12) is formed, on the pump shaft (8) of mounting point in impeller (10) working room, the back side; The disk periphery of friction disk (9) is fixed on pump case (5) inwall, and leaves gap (S between the impeller (10) 1), spacer (11), outer motive sealing bowl (13) and clamping pad (12) are contained on the pump shaft (8) in the friction disk cavity (D), outer motive sealing bowl (13) is sleeved on the spacer (11), and by clamping pad (12) in axial compression; Leave radial clearance (S between outer motive sealing bowl (13) the rim of a bowl outer rim and the friction disk cavity (D) 2), leave axial clearance (S between the rim of a bowl plane and friction disk cavity (D) plane of the opening 3).The disk end through hole of friction disk (9) is cavity (D), and is separated with packing seam (T) between the packing mounting hole (Q) of the cavity (D) and friction disk (9) the other end, and whole friction disk (9) center is for running through through hole.Spacer (11) is the axle sleeve that an end has disk, and the centre has axis hole, is contained on the pump shaft (8), is set with outer motive sealing bowl (13) on spacer (11) periphery, and the disk interior edge face contacts with the bowl bottom end of outer motive sealing bowl (13).Outer motive sealing bowl (13) is bowl-shape elastomer seal, the bowl end, have through hole (G), is sleeved on the spacer (11) bowl bottom plane and the rim of a bowl plane parallel, the bowl bottom end contacts with spacer (11) disk interior edge face, and the rim of a bowl is towards the opening direction of friction disk cavity (D).Outer motive sealing bowl (13) is to be made by anti-corrosion rubber.Clamping pad (12) is a plain washer, be contained on the pump shaft (8) between spacer (11) and the impeller (10), its periphery diameter is greater than the end face diameter of spacer (11), and the bowl end that will be sleeved on the outer motive sealing bowl (13) on the spacer (11) is pressed on the disk of spacer (11).Outer motive sealing bowl (13) bowl bottom divides by spacer (11) and clamping pad (12) fixing, and the rim of a bowl part maintains radial clearance (S between state of rest and friction disk cavity (D) 2) and axial clearance (S 3), the rim of a bowl outer rim expands outwardly under the working state, closely contacts with friction disk cavity (D) inner headed face and forms sealing, at this moment radial clearance (S 2) be 0, axial clearance (S 3) strengthen thereupon; Still keep sealing state when quitting work.Gap (S between friction disk (9) and the impeller (10) 1) be 0.7~0.9 millimeter, the radial clearance (S between outer motive sealing bowl (13) the rim of a bowl outer rim and the friction disk cavity (D) 2) be 1~2 millimeter, axial clearance (S 3) be 1.5~2.5 millimeters.
Mounting point of the present utility model is on the pump shaft (8) at adjacent impeller (10) back side in the impeller working room, what join with impeller (10) is clamping pad (12), clamping pad (12) contacts with spacer (11), and outer motive sealing bowl (13) is pressed on spacer (11) disk interior edge face, spacer (11) is gone up the outer motive sealing bowl (13) of suit; Clamping pad (12), spacer (11) and outer motive sealing bowl (13) all are installed in the cavity (D) of friction disk (9), have formed differential seal arrangement jointly.
Through above-mentioned design, improve and actual tests, prove that the utility model is simple in structure; manufacturing is easy; sealing is reliable, and is easy for installation, reduced power consumption; the wearing and tearing of pump shaft have been prevented; prolonged operating life greatly, need not change Sealing substantially in the time limit, improved working efficiency in the operating life of centrifugal pump; reduced shutdown loss, successfully realized giving setting the goal.
Below accompanying drawing is illustrated.
Fig. 1 is existing machinery sealing mounting point figure;
Fig. 2 is the existing machinery sealed structural representation;
Fig. 3 is the utility model mounting point figure;
Fig. 4 is the utility model structural representation;
Fig. 5 is friction disk (a 9) half sectional view;
Fig. 6 is the side view of Fig. 5;
Fig. 7 is spacer (a 11) half sectional view;
Fig. 8 is the side view of Fig. 7;
Fig. 9 is outer motive sealing bowl (a 13) half sectional view;
Figure 10 is the side view of Fig. 9;
Figure 11 is clamping pad (12).
Among the figure, (1)-rotating ring, (2)-stationary ring, (3)-and gland, (4)-supporting base, (5)-pump case, (6)-suction flange, (7)-and coupling, (8)-pump shaft, (9)-friction disk, (10)-impeller, (11)-and spacer, (12)-clamping pad, (13)-outer motive sealing bowl; (W)-differential seal arrangement combination (forming) by 9,11,12,13, (D)-the friction disk cavity, (G)-outer motive sealing bowl bowl at the bottom of through hole, (T)-the packing seam, (S 1)---gap, (S 2)-radial clearance, (S 3)-axial clearance.
The utility model is described in further detail by embodiment at last.
According to aforementioned seal arrangement, friction disk QT60-2 spheroidal graphite cast iron manufacturing, its cavity external diameter is 95 millimeters, and dark 25 millimeters, outer motive sealing bowl is made of corrosion resistance rubber, and spacer is made with No. 45 steels, and clamping pad is processed with 0.5 millimeter steel plate.Outer motive sealing bowl is sleeved on the spacer, is installed on the shaft seal section with clamping pad, places in the friction disk cavity.Supporting with main frame SB150 type centrifugal pump, be used for the oil drilling solid controlling system.During start, drilling fluid rotation under impeller drives forms 4 * 10 in the impeller working room 5The pressure of Pa outwards opens outer motive sealing bowl the rim of a bowl, outer rim and friction disk cavity internal diameter fit tightly, and has stopped the clearance leakage between the pump shaft and friction disk in the blade wheel chamber.During shutdown,, keep certain potential energy, in the sand pump impeller working room, still have 2 * 10 because slurry tank is higher than sand pump 5The pressure of Pa makes outer motive sealing bowl keep sealing state.Compare with the Conic Mechanical Seal device; the utility model operating life prolongs more than 10 times; power consumpiton per hour reduces 0.733KW; annual 4600 kilowatt hours that reduce of power consumption; the sand pump leakage rate is only shut down moment after work have micro-sepage; basic not leakage during the start, sealing effect is better than the existing machinery sealing.Actual life of the present utility model and sand pump main frame are synchronous, need not change sealing in the whole operating life of sand pump substantially in the time limit, have significantly reduced shutdown loss and maintenance expenses, have improved manufacturing efficiency, and economic benefit and social benefit are all very remarkable.

Claims (9)

1, a kind of centrifugal pump seal arrangement is characterized in that it being by friction disk (9), spacer (11), and outer motive sealing bowl (13), clamping pad (12) is formed, on the pump shaft (8) of mounting point in impeller (10) working room, the back side; The disk periphery of friction disk (9) is fixed on pump case (5) inwall, and leaves gap (S between the impeller (10) 1), spacer (11), outer motive sealing bowl (13) and clamping pad (12) are contained on the pump shaft (8) in the friction disk cavity (D), outer motive sealing bowl (13) is sleeved on the spacer (11), and by clamping pad (12) in axial compression; Leave radial clearance (S between outer motive sealing bowl (13) the rim of a bowl outer rim and the friction disk cavity (D) 2), leave axial clearance (S between the rim of a bowl plane and friction disk cavity (D) plane of the opening 3).
2, according to the described centrifugal pump seal arrangement of claim 1, the disk through hole that it is characterized in that said friction disk (9) is cavity (D), and between the packing mounting hole (Q) of the cavity (D) and friction disk (9) the other end, being separated with packing seam (T), whole friction disk (9) center is for running through through hole.
3, according to the described centrifugal pump seal arrangement of claim 1, it is characterized in that said spacer (11) is the axle sleeve that an end has disk, the centre has axis hole, be contained on the pump shaft (8), be set with outer motive sealing bowl (13) on spacer (11) periphery, the disk interior edge face contacts with the bowl bottom end of outer motive sealing bowl (13).
4, according to the described centrifugal pump seal arrangement of claim 1, it is characterized in that said outer motive sealing bowl (13) is bowl-shape elastomer seal, the bowl end, have through hole (G), be sleeved on the spacer (11), bowl bottom plane and the rim of a bowl plane parallel, the bowl bottom end contacts with spacer (11) disk interior edge face, and the rim of a bowl is towards the opening direction of friction disk cavity (D).
5,, it is characterized in that said outer motive sealing bowl (13) is to be made by anti-corrosion rubber according to claim 1 or 4 described centrifugal pump seal arrangements.
6, according to the described centrifugal pump seal arrangement of claim 1, it is characterized in that said clamping pad (12) is a plain washer, be contained on the pump shaft (8) between spacer (11) and the impeller (10), its periphery diameter is greater than the end face diameter of spacer (11), and the bowl end that will be sleeved on the outer motive sealing bowl (13) on the spacer (11) is pressed on the disk of spacer (11).
7, according to claim 1 or 4 described centrifugal pump seal arrangements, it is fixing to it is characterized in that said outer motive sealing bowl (13) bowl bottom divides by spacer (11) and clamping pad (12), and the rim of a bowl part maintains radial clearance (S between state of rest and friction disk cavity (D) 2) and axial clearance (S 3), the rim of a bowl outer rim expands outwardly under the working state, closely contacts with friction disk cavity (D) inner headed face and forms sealing, at this moment radial clearance (S 2) be 0, when quitting work, still keep sealing state.
8,, it is characterized in that the gap (S between said friction disk (9) and the impeller (10) according to the described centrifugal pump seal arrangement of claim 1 1) be 0.7~0.9 millimeter, the radial clearance (S between outer motive sealing bowl (13) the rim of a bowl outer rim and the friction disk cavity (D) 2) be 1~2 millimeter, axial clearance (S 3) be 1.5~2.5 millimeters.
9, according to the described centrifugal pump seal arrangement of claim 1, it is characterized in that said mounting point is on the pump shaft (8) at adjacent impeller (10) back side in the impeller working room, what join with impeller is clamping pad (12), clamping pad (12) contacts with spacer (11), and outer motive sealing bowl (13) is pressed on spacer (11) disk interior edge face, spacer (11) is gone up the outer motive sealing bowl (13) of suit; Clamping pad (12), spacer (11) and outer motive sealing bowl (13) all are installed in the cavity (D) of friction disk (9).
CN 91211190 1991-01-31 1991-01-31 Differential pressure seal device of centrifugal pump Withdrawn CN2086335U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91211190 CN2086335U (en) 1991-01-31 1991-01-31 Differential pressure seal device of centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91211190 CN2086335U (en) 1991-01-31 1991-01-31 Differential pressure seal device of centrifugal pump

Publications (1)

Publication Number Publication Date
CN2086335U true CN2086335U (en) 1991-10-09

Family

ID=4919898

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 91211190 Withdrawn CN2086335U (en) 1991-01-31 1991-01-31 Differential pressure seal device of centrifugal pump

Country Status (1)

Country Link
CN (1) CN2086335U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963887A (en) * 2015-07-14 2015-10-07 北京航天动力研究所 Blade wheel sealing structure used for high-speed high-pressure centrifugal pump
CN111118525A (en) * 2020-02-16 2020-05-08 中科院大连化学物理研究所张家港产业技术研究院有限公司 Electrolytic tank suitable for pressurizing circulating pump shell and working method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963887A (en) * 2015-07-14 2015-10-07 北京航天动力研究所 Blade wheel sealing structure used for high-speed high-pressure centrifugal pump
CN111118525A (en) * 2020-02-16 2020-05-08 中科院大连化学物理研究所张家港产业技术研究院有限公司 Electrolytic tank suitable for pressurizing circulating pump shell and working method thereof
CN111118525B (en) * 2020-02-16 2023-08-15 扬州乐道能源科技有限公司 Electrolytic tank suitable for pressurizing circulating pump shell and working method thereof

Similar Documents

Publication Publication Date Title
JP3936911B2 (en) Sealing device for hydraulic turbomachine
CN104948469A (en) Wear resistant corrosion resisting centrifugal pump
CN210739371U (en) High-speed spiral sealing device
CN204921382U (en) Wear -resisting corrosion resisting centrifugal pump
CN2086335U (en) Differential pressure seal device of centrifugal pump
CN201599202U (en) High temperature and high pressure process pump
CN202811476U (en) Submersible pump mechanical seal device
CN201031764Y (en) Hydroturbine chief axis non-contact type metallic sealing structure
CN202348682U (en) Slow-rotary-speed corrosion-resisting wear-resisting centrifugal pump
CN2197488Y (en) Vertical mud pump
CN201126015Y (en) Fluid kinetic pressure type seal machine for kettle
CN2575377Y (en) Automatic regulating temperature valve for warming
CN1037369C (en) New-type piston-ring
CN2844583Y (en) " V " structure oil catch
CN2065258U (en) Combined shaft seal for dry electric pump
CN219622838U (en) Reciprocating compressor
CN216199031U (en) Mechanical seal structure for integrated double-end-face centrifugal slurry pump
CN215890506U (en) Submersible sand pump
CN219452515U (en) Centrifugal pump
CN214466094U (en) Split dovetail type mechanical sealing device
CN1022586C (en) Liquid-ring shaftseal
CN203500099U (en) Low-pressure rotary shaft sealing device
CN2073500U (en) Mechanical seal for submersible pump
CN217380994U (en) Water seal type gap sealing device for water pump
CN2592910Y (en) Improved arrangement structure of main bearing and mechanical sealing for submersible pollution discharge pump

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee