CN207647829U - A kind of centrifugal pump preventing impeller outlet clearance leakage - Google Patents

A kind of centrifugal pump preventing impeller outlet clearance leakage Download PDF

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Publication number
CN207647829U
CN207647829U CN201721746294.8U CN201721746294U CN207647829U CN 207647829 U CN207647829 U CN 207647829U CN 201721746294 U CN201721746294 U CN 201721746294U CN 207647829 U CN207647829 U CN 207647829U
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China
Prior art keywords
impeller
shroud
ontology
pump cover
centrifugal pump
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Active
Application number
CN201721746294.8U
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Chinese (zh)
Inventor
朱国俊
吉龙娟
景信信
冯建军
罗兴锜
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Xian University of Technology
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Xian University of Technology
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Priority to CN201721746294.8U priority Critical patent/CN207647829U/en
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Abstract

The utility model discloses a kind of centrifugal pumps preventing impeller outlet clearance leakage, including spiral case, pump cover has been bolted in spiral case, pump cover is connected with inlet tube, impeller is fixed in spiral case, pump cover is located on the outside of impeller, and pump cover is not contacted with impeller, the input end of impeller is connected separately with inducer and main shaft, and inducer is connected with main shaft, impeller both sides are respectively fixed with front shroud of impeller and back shroud of impeller, it is provided with sealing device on the outside of front shroud of impeller and back shroud of impeller, sealing device includes the ontology being fixed on the outside of front shroud of impeller and back shroud of impeller, ontology is annular shape, and the upper surface of ontology is flushed with impeller outlet, ontology is provided with ring-shaped groove on the side surface of pump cover and along the circumferencial direction of ontology.The utility model is simple in structure, easy to use;Effectively reduce the leakage loss of flow;Leakage rate reduces, and forms good sealing effect, improves the working efficiency and working life of centrifugal pump.

Description

A kind of centrifugal pump preventing impeller outlet clearance leakage
Technical field
The utility model belongs to fluid machinery technical field of engineering equipment, is related to a kind of impeller outlet clearance leakage of preventing Centrifugal pump.
Background technology
At runtime for traditional pump, fluid obtains energy from impeller, and the pressure at impeller outlet is made to be higher than entrance Pressure, this pressure difference drive segment fluid flow along the gap between impeller eye and body seal ring by outlet return to entering Mouthful, the energy expenditure obtained from impeller, therefore can not be complete by the theoretical delivery of impeller in overcoming on the resistance of flowing The full outlet for being transported to pump so that there are larger volume leakage losses for centrifugal pump.There is no go out current centrifugal pump in impeller Sealing device is installed on mouthful, so there are prodigious leakage losses.Increase with the leakage rate of fluid at impeller outlet, it can be to leaf Piece entrance generates larger impact, and vorticity increases.Leakage whirlpool at impeller outlet will also result in the turbulent flow of impeller leakage runner Pulsation, occurs the wild effects such as vibration, noise so as to cause centrifugal pump in the process of running, influences centrifugal pump sealing device fortune Capable efficiency and security and stability.
Utility model content
The purpose of this utility model is to provide a kind of centrifugal pump preventing impeller outlet clearance leakage, improves centrifugal pump leaf The clearance leakage for taking turns outlet, improves the volumetric efficiency of centrifugal pump.
The utility model is the technical scheme adopted is that a kind of centrifugal pump preventing impeller outlet clearance leakage, including snail Pump cover has been bolted in shell, spiral case, and pump cover is connected with inlet tube, and impeller is fixed in spiral case, and pump cover is located on the outside of impeller, And pump cover is not contacted with impeller, the input end of impeller is connected separately with inducer and main shaft, and inducer is connected with main shaft, impeller Both sides are respectively fixed with front shroud of impeller and back shroud of impeller, and sealing dress is provided on the outside of front shroud of impeller and back shroud of impeller It sets, sealing device includes the ontology being fixed on the outside of front shroud of impeller and back shroud of impeller, and ontology is annular shape, and ontology is upper End face is flushed with impeller outlet, and ontology is provided with ring-shaped groove on the side surface of pump cover and along the circumferencial direction of ontology.
The utility model is also characterized by
Ontology is 0.2mm~0.5mm close to the distance between the side surface of pump cover and pump cover.
Ring-shaped groove is no less than four, and ring-shaped groove is uniformly arranged on the body.
The cone angle of ring-shaped groove is θ, and the angular range of taper angle theta is 35 °~50 °.
The depth of ring-shaped groove is 0.4mm~1.0mm.
The utility model has the beneficial effects that a kind of centrifugal pump structure preventing impeller outlet clearance leakage of the utility model Simply, easy to use;Stream that one tortuous, that flow resistance is high is formd between sealing device and pump cover in the utility model Road, when flow is by gap runner between ontology and pump cover, water (flow) direction constantly changes, and generates throttle effect, increases Resistance to water-flow effectively reduces the leakage loss of flow, and leakage rate reduces, and reduces impact of the flow to impeller eye, is formed Good sealing effect;Vibrations and the noise for reducing unit, increase the security and stability of unit operation, improve centrifugal pump Working efficiency and working life.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for the centrifugal pump for preventing impeller outlet clearance leakage of the utility model;
Fig. 2 is the structural schematic diagram amplified at A in Fig. 1;
Fig. 3 is that the part section of sealing device in a kind of centrifugal pump preventing impeller outlet clearance leakage of the utility model shows It is intended to.
In figure, 1. pump covers, 2. impellers, 3. ontologies, 4. ring-shaped grooves, 5. spiral cases, 6. inducers, 7. inlet tubes, 8. main shafts, 9. front shroud of impeller, 10. back shroud of impeller.
Specific implementation mode
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of centrifugal pump preventing impeller outlet clearance leakage of the utility model, as shown in Figure 1, including spiral case 5, spiral case 5 Pump cover 1 has been bolted, pump cover 1 is connected with inlet tube 7, and impeller 2 is fixed in spiral case 5, and pump cover 1 is located at 2 outside of impeller, And pump cover 1 is not contacted with impeller 2, the input end of impeller 2 is connected separately with inducer 6 and main shaft 8, and inducer 6 and main shaft 8 connect It connects, 2 both sides of impeller are respectively fixed with front shroud of impeller 9 and back shroud of impeller 10, as shown in Fig. 2, after front shroud of impeller 9 and impeller 10 outside of cover board is provided with sealing device, and sealing device includes the sheet for being fixed on 10 outside of front shroud of impeller 9 and back shroud of impeller Body 3, ontology 3 is annular shape, and the upper surface of ontology 3 and impeller 2 are exported and flushed, and ontology 3 is on the side surface of pump cover 1 and edge The circumferencial direction of ontology 3 is provided with ring-shaped groove 4, as shown in figure 3, ring-shaped groove 4 is no less than four, and ring-shaped groove 4 is at this It is uniformly arranged on body 3, the cone angle of ring-shaped groove 4 is θ, and the angular range of taper angle theta is 35 °~50 °, the depth of ring-shaped groove 4 For 0.4mm~1.0mm, ontology 3 is 0.2mm~0.5mm close to the distance between the side surface of pump cover 1 and pump cover 1.
By the above-mentioned means, a kind of centrifugal pump structure preventing impeller outlet clearance leakage of the utility model is simple, use It is convenient;Runner that one is tortuous, that flow resistance is high is formd between sealing device in the utility model and pump cover 1, When flow is by gap runner between ontology 3 and pump cover 1, water (flow) direction constantly changes, and generates throttle effect, increases water Flow resistance power effectively reduces the leakage loss of flow;Reduced velocity flow, leakage rate reduce, and reduce flow and are rushed to impeller eye It hits, reduces the increase of 2 inlet vorticity of impeller, and form good sealing effect;Vibrations and the noise for reducing unit, increase machine The security and stability of group operation, improves the working efficiency and working life of centrifugal pump.

Claims (5)

1. a kind of centrifugal pump preventing impeller outlet clearance leakage, which is characterized in that including spiral case (5), the spiral case (5) passes through It is bolted pump cover (1), the pump cover (1) is connected with inlet tube (7), and impeller (2) is fixed in the spiral case (5), described Pump cover (1) is located on the outside of impeller (2), and the pump cover (1) is not contacted with impeller (2), and the input end of the impeller (2) connects respectively It is connected to inducer (6) and main shaft (8), and the inducer (6) and main shaft (8) connection, impeller (2) both sides are respectively fixed with It is provided with sealing on the outside of front shroud of impeller (9) and back shroud of impeller (10), the front shroud of impeller (9) and back shroud of impeller (10) Device, the sealing device include being fixed on ontology (3) on the outside of front shroud of impeller (9) and back shroud of impeller (10), described Body (3) is annular shape, and the upper surface of the ontology (3) is flushed with impeller (2) outlet, and the ontology (3) is close to pump cover (1) It is provided with ring-shaped groove (4) on side surface and along the circumferencial direction of ontology (3).
2. a kind of centrifugal pump preventing impeller outlet clearance leakage according to claim 1, which is characterized in that the ontology (3) it is 0.2mm~0.5mm close to the distance between the side surface of pump cover (1) and pump cover (1).
3. a kind of centrifugal pump preventing impeller outlet clearance leakage according to claim 1, which is characterized in that the annular Groove (4) is no less than four, and the ring-shaped groove (4) is uniformly arranged on ontology (3).
4. a kind of centrifugal pump preventing impeller outlet clearance leakage according to claim 1 or 3, which is characterized in that described The cone angle of ring-shaped groove (4) is θ, and the angular range of the taper angle theta is 35 °~50 °.
5. a kind of centrifugal pump preventing impeller outlet clearance leakage according to claim 4, which is characterized in that the annular The depth of groove (4) is 0.4mm~1.0mm.
CN201721746294.8U 2017-12-14 2017-12-14 A kind of centrifugal pump preventing impeller outlet clearance leakage Active CN207647829U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721746294.8U CN207647829U (en) 2017-12-14 2017-12-14 A kind of centrifugal pump preventing impeller outlet clearance leakage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721746294.8U CN207647829U (en) 2017-12-14 2017-12-14 A kind of centrifugal pump preventing impeller outlet clearance leakage

Publications (1)

Publication Number Publication Date
CN207647829U true CN207647829U (en) 2018-07-24

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Application Number Title Priority Date Filing Date
CN201721746294.8U Active CN207647829U (en) 2017-12-14 2017-12-14 A kind of centrifugal pump preventing impeller outlet clearance leakage

Country Status (1)

Country Link
CN (1) CN207647829U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109764000A (en) * 2019-02-25 2019-05-17 江苏大学 A kind of mixed-flow pump runner envelope with spiral shape pumping groove

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109764000A (en) * 2019-02-25 2019-05-17 江苏大学 A kind of mixed-flow pump runner envelope with spiral shape pumping groove
CN109764000B (en) * 2019-02-25 2020-06-09 江苏大学 Mixed flow pump runner chamber with spiral pumping groove

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