CN203009310U - Cavitation-resistant type vane pump - Google Patents

Cavitation-resistant type vane pump Download PDF

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Publication number
CN203009310U
CN203009310U CN 201220646354 CN201220646354U CN203009310U CN 203009310 U CN203009310 U CN 203009310U CN 201220646354 CN201220646354 CN 201220646354 CN 201220646354 U CN201220646354 U CN 201220646354U CN 203009310 U CN203009310 U CN 203009310U
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CN
China
Prior art keywords
impeller
pump
vane
cavitation
vane pump
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Withdrawn - After Issue
Application number
CN 201220646354
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Chinese (zh)
Inventor
霍幼文
汤企平
高君
周文朝
徐金星
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.)
KSB Shanghai Pump Co Ltd
Original Assignee
KSB Shanghai Pump 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 KSB Shanghai Pump Co Ltd filed Critical KSB Shanghai Pump Co Ltd
Priority to CN 201220646354 priority Critical patent/CN203009310U/en
Application granted granted Critical
Publication of CN203009310U publication Critical patent/CN203009310U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

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Abstract

The utility model relates to a cavitation-resistant type vane pump, and belongs to a water pump, which aims at improving the cavitation-resistant performance of the vane pump. The vane pump comprises a motor, an impeller, a vane body and a sealing ring, wherein the motor is connected with a pump shaft, the impeller is fixedly arranged on the pump body by an impeller nut, the vane body is arranged at the outer side of the impeller, the sealing ring is arranged on a water inlet horn pipe of the pump, an O-shaped sealing ring is arranged between the water inlet horn pipe and the vane body, the O-shaped sealing ring, the water inlet horn pipe and the vane body are connected together by a stud, matching gaps at the matched part of the inlet part of the impeller and the sealing ring are in an inverted V-shaped cone surface and are uniformly changed from large to small, the leaked high-pressure liquid aligns with the inlet edge of the vane, a back cover plate of the impeller, near the inlet edge of the vane, is drilled with a plurality of jet holes, and the jet holes are arranged close to the crossed line of the back side of the vane and the back cover plate. The vane pump has the advantage that the high-pressure water flowing from an outlet of the impeller flows to the inlet edge of the vane and the area near the back side of the inlet edge, so the distribution condition of lower pressure near the inlet edge of the impeller is improved, the cavitation caused by overlow pressure is avoided, and the cavitation-resistant performance of the vane pump is improved.

Description

A kind of anti-cavitation vane pump
Technical field
The utility model relates to a kind of water pump, refers in particular to a kind of anti-cavitation vane pump.
Background technique
In existing vane pump, seal ring is generally flat construction, and as shown in Figure 4, in vane pump, the import position of impeller 48 is designed to L-type with the matching gap at seal ring 411 places of matching; As shown in Figure 5, have also in the minority vane pump that the import position of impeller of vane pump 58 is designed to matching gap with seal ring 511 places of matching is V-type.In the situation that above cooperation, the high-pressure water flow that flow out on the impeller outlet limit by the gap between impeller and seal ring, flows to the impeller inlet limit.The a fluid stream of this high-pressure water flow is generally perpendicular to the pump shaft axis, or the deflection Pump Suction Nozzle.Pressure to entrance edge of blade improves not at all improvement, makes on the contrary the import fluidised form disorderly, usually can take this leakage flow of minimum gap control.And impeller inlet limit hypotony can produce cavitation, causes the water pump vane surface to produce and peels off and damage.
The model utility content
The purpose of this utility model is the problem that exists in order to overcome prior art, and a kind of anti-cavitation vane pump that can improve the anti-cavitation performance of pump is provided.
The purpose of this utility model is achieved through the following technical solutions:
A kind of anti-cavitation vane pump, described vane pump comprises: the motor that is connected with pump shaft, support the bearing of pump shaft, be fixed on impeller on pump shaft by impeller nut, be located at the diffuser in the impeller outside, be arranged on the seal ring on the water-inlet horn pipe of pump by screw, between described water-inlet horn pipe and diffuser, the O RunddichtringO is housed, and link together by double-screw bolt and nut, wherein:
The import position of impeller is the reverse V-shaped conical surface with the matching gap at the seal ring place of matching, and an angle is arranged between two conical surfaces, and the descending even variation of its matching gap makes the high pressure liquid stream that leaks out, and aims at entrance edge of blade;
Back shroud of impeller drills through several apertures near the entrance edge of blade position, and as jet hole, jet hole is near the intersection of vacuum side of blade and back shroud.
Described seal ring internal diameter is less than described impeller eye internal diameter.
Minimum clearance 〉=0.3mm in the matching gap of the described reverse V-shaped conical surface.
The aperture of described jet hole is 3mm-15mm.
The quantity of described jet hole equates with the number of blade or the integer multiple of the number of blade.
The beneficial effects of the utility model:
In vane pump of the present utility model, the import position of impeller of vane pump being designed to matching gap with the seal ring place of matching is the conical surface, and the high-pressure water flow that impeller outlet is flowed out flows to entrance edge of blade; In addition, near the entrance edge of blade position, drill through several apertures at back shroud of impeller, as jet hole, jet hole is near vacuum side of blade, and the high-pressure water flow that impeller outlet is flowed out flows near the entrance edge of blade back side.Because this vane pump adopts above-mentioned 2 improvement projects, improved the situation that near the lower pressure of former impeller inlet side distributes, thereby avoided greatly having improved the anti-cavitation performance of vane pump because hypotony produces cavitation.
For further illustrating above-mentioned purpose of the present utility model, structural feature and effect, below with reference to accompanying drawing, the utility model is elaborated.
Description of drawings
Fig. 1 is anti-cavitation vane pump structural representation of the present utility model;
Fig. 2 is equalizing orifice schematic diagram in existing vane pump;
Fig. 3 is jet hole schematic diagram in the utility model;
Fig. 4 is existing impeller inlet position is the schematic diagram of L-type with the matching gap at the seal ring place of matching;
Fig. 5 is existing impeller inlet position is the schematic diagram of V-type with the matching gap at the seal ring place of matching;
Fig. 6 is impeller inlet of the present utility model position is reverse V-shaped schematic diagram with the matching gap at the seal ring place of matching;
Fig. 7 is the enlarged view of Fig. 6.
Embodiment
Accompanying drawing below in conjunction with embodiment is elaborated to embodiment of the present utility model.
Referring to Fig. 1, anti-cavitation vane pump of the present utility model comprises: the motor (not shown) that is connected with pump shaft 13, support the bearing 12 of pump shaft 13, be fixed on impeller 8 on pump shaft 13 by impeller nut 2, be located at the diffuser 7 in impeller 8 outsides, be arranged on the seal ring 11 on the water-inlet horn pipe 1 of pump by screw 3, O RunddichtringO 6 be housed with anti-leak between described water-inlet horn pipe 1 and diffuser 7, and link together by double-screw bolt 4 and nut 5.
The matching gap 10 at place of in the utility model, being matched with seal ring 11 in the import position of impeller of vane pump 8 is the conical surface, one angle is arranged between two conical surfaces, and the descending even variation in its gap is reverse V-shaped (being "∧" type), make the high pressure liquid stream that leaks out, aim at entrance edge of blade.Its structure is shown in Figure 6, and the high-pressure water flow that this structure flows out impeller 8 outlet flows to entrance edge of blade, and namely a fluid stream of this high-pressure water flow, aim at entrance edge of blade, the pressure of entrance edge of blade is improved be greatly improved, thereby has suppressed the generation of cavitation.Above-mentioned seal ring 11 internal diameters are slightly smaller than impeller 8 entrance internal diameters, by moving up and down of pump shaft 13, the clearance distance of matching gap 10 between adjustable impeller 8 and seal ring 11, by adjusting the clearance distance of matching gap 10, can control the flow of high-pressure water flow, find the appropriate balance point between efficient and cavitation.Referring to Fig. 7, the minimum clearance distance L(of matching gap 10 refers to the gap near entrance edge of blade one end) be controlled at 〉=below 1% of 0.3mm(impeller 8 diameters),
In addition, near the entrance edge of blade position, drill through several apertures at impeller 8 back shrouds, as jet hole 9, as shown in Figure 3, jet hole 6 is near the intersection of vacuum side of blade and back shroud, and the quantity of jet hole equates with the number of blade or the integer multiple of the number of blade.The aperture of jet hole 9 is 3mm-15mm.Jet hole 6 flows near the entrance edge of blade back side high-pressure water flow that impeller 8 outlet is flowed out.This structure is mainly that the back side near the pressure in back shroud zone, with the generation of further inhibition cavitation, can also make bubble pile up in the vacuum side of blade difficult local simultaneously near entrance edge of blade in order to increase.This leakage fluid stream has been avoided flowing from the main liquid that impeller 8 imports suck, and is little on the decrease in efficiency impact.This structure and above-mentioned matching gap 10 are the design of reverse V-shaped structure, can greatly improve the anti-cavitation performance of vane pump, simultaneously all right a small amount of axial force of balance of this structure, to reduce the load of thrust-bearing, reduce vibration and noise, pump operation is got more steady, improve the working life of pump.Mark 101 explanations in Fig. 3: described matching gap 10 is made of two fitting surfaces, and one is impeller fitting surface 101, and another is the fitting surface of seal ring 11.
Above-mentioned jet hole 9 is shown in Figure 2 with equalizing orifice 29(of the prior art) essential distinction arranged.The main cavitation that suppresses of jet hole 9 produces, and is located at the vacuum side of blade root, and the aperture is less, has avoided the main flow of impeller 8 imports by the liquid stream of jet hole 9, and is very little on the decrease in efficiency impact.The main balancing axial thrust of equalizing orifice 29, in the middle of adjacent blades, the aperture is larger, and is larger to the main current turbulence of impeller 28 imports by the liquid stream of equalizing orifice, larger on the decrease in efficiency impact.
In this vane pump, by the directed of liquid backflow quantitatively imported, reduce near the low pressure area area of entrance edge of blade, suppressed the generation of cavitation, avoided simultaneously the main liquid stream from the impeller inlet suction, little on the decrease in efficiency impact.Through ANASYS13.0 analog computation analysis and verification experimental verification, net positive suction head has obvious reduction.Change amount to existing part is less, and impeller does not need to do mould again, saves cost, and this vane pump generally is applicable to centrifugal pump and the part mixed flow pump of various specific speeds.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the purpose of this utility model, and be not with opposing restriction of the present utility model, as long as in essential scope of the present utility model, all will drop in the scope of claim of the present utility model the above embodiment's variation, modification.

Claims (5)

1. anti-cavitation vane pump, described vane pump comprises: the motor that is connected with pump shaft, support the bearing of pump shaft, be fixed on impeller on pump shaft by impeller nut, be located at the diffuser in the impeller outside, be arranged on the seal ring on the water-inlet horn pipe of pump by screw, between described water-inlet horn pipe and diffuser, the O RunddichtringO is housed, and link together by double-screw bolt and nut, it is characterized in that:
The import position of impeller is the reverse V-shaped conical surface with the matching gap at the seal ring place of matching, and an angle is arranged between two conical surfaces, and the descending even variation of its matching gap makes the high pressure liquid stream that leaks out, and aims at entrance edge of blade;
Back shroud of impeller drills through several apertures near the entrance edge of blade position, and as jet hole, jet hole is near the intersection of vacuum side of blade and back shroud.
2. anti-cavitation vane pump as claimed in claim 1 is characterized in that:
Described seal ring internal diameter is less than described impeller eye internal diameter.
3. anti-cavitation vane pump as claimed in claim 1 is characterized in that:
Minimum clearance 〉=0.3mm in the matching gap of the described reverse V-shaped conical surface.
4. anti-cavitation vane pump as claimed in claim 1 is characterized in that:
The aperture of described jet hole is 3mm-15mm.
5. anti-cavitation vane pump as claimed in claim 1 is characterized in that:
The quantity of described jet hole equates with the number of blade or the integer multiple of the number of blade.
CN 201220646354 2012-11-29 2012-11-29 Cavitation-resistant type vane pump Withdrawn - After Issue CN203009310U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220646354 CN203009310U (en) 2012-11-29 2012-11-29 Cavitation-resistant type vane pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220646354 CN203009310U (en) 2012-11-29 2012-11-29 Cavitation-resistant type vane pump

Publications (1)

Publication Number Publication Date
CN203009310U true CN203009310U (en) 2013-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220646354 Withdrawn - After Issue CN203009310U (en) 2012-11-29 2012-11-29 Cavitation-resistant type vane pump

Country Status (1)

Country Link
CN (1) CN203009310U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103850947A (en) * 2012-11-29 2014-06-11 上海凯士比泵有限公司 Anti-cavitation vane pump
CN105650025A (en) * 2016-01-08 2016-06-08 兰州理工大学 Centrifugal pump impeller
CN106089796A (en) * 2016-07-18 2016-11-09 台州锦霸工贸有限公司 A kind of impeller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103850947A (en) * 2012-11-29 2014-06-11 上海凯士比泵有限公司 Anti-cavitation vane pump
CN103850947B (en) * 2012-11-29 2017-03-08 上海凯士比泵有限公司 A kind of anti-cavitation vane pump
CN105650025A (en) * 2016-01-08 2016-06-08 兰州理工大学 Centrifugal pump impeller
CN106089796A (en) * 2016-07-18 2016-11-09 台州锦霸工贸有限公司 A kind of impeller

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned
AV01 Patent right actively abandoned

Granted publication date: 20130619

Effective date of abandoning: 20171114