CN210531161U - Constant pressure vortex pump - Google Patents
Constant pressure vortex pump Download PDFInfo
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- CN210531161U CN210531161U CN201920603913.0U CN201920603913U CN210531161U CN 210531161 U CN210531161 U CN 210531161U CN 201920603913 U CN201920603913 U CN 201920603913U CN 210531161 U CN210531161 U CN 210531161U
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Abstract
The utility model discloses a constant voltage vortex pump, it includes the pump body, sealing ring, impeller, mechanical seal, pump cover, bracket and motor. The impeller is a semi-open structural member with the diameter of D2, and takes 8-12 main blades uniformly distributed on the front surface of a rear cover plate and 8-12 auxiliary blades uniformly distributed on the back surface as main bodies, and a layer of front cover plate is additionally arranged at the inlet of all the main blades. The suction end of the front cover plate is in clearance fit with the sealing ring, the outer diameter D4= K1D2 of the front cover plate, and K1 is 0.3-0.4. The main blades are arranged along the inclined direction relative to the axis, and are uniformly bent along the anticlockwise direction at the position with the diameter D3, the auxiliary blades are half straight blocks, and all the auxiliary blades are uniformly distributed in the circumference of D5 and are arranged in the radial direction. The front cover plate has the functions of increasing and stabilizing the suction capacity of the main blade inlet in the structure and reducing internal leakage, so that the energy loss and the noise of the constant-pressure vortex pump are reduced, the hydraulic efficiency of the pump is improved, and meanwhile, the generation of a hump curve under a small-flow working condition is avoided.
Description
Technical Field
The utility model belongs to the technical field of a hydraulic machinery technical field's a technical scheme, specifically say, the utility model relates to a water pump, especially an eddy current pump according to rated lift output.
Background
The large and medium ship belongs to a floating carrier with complete functions, has the same safety problem as industrial and civil buildings, and needs to be provided with a corresponding fire fighting device. The main machine of the fire fighting device is a centrifugal water pump, and a constant-pressure tangent pump is usually selected as the centrifugal water pump matched with a commercial fire fighting device. The working performance of the centrifugal water pump for fire fighting is different from that of the conventional centrifugal water pump, and the main difference is that the centrifugal water pump outputs under a constant pressure state, namely, the centrifugal water pump outputs at a fixed lift. The part of deciding the lift height in centrifugal water pump structure is the impeller, and the built-in impeller of constant pressure tangent pump of prior art is open structure, and supporting main blade and back of the body blade all are radial arrangement with the impeller center moreover, and the interior starting point of main blade is the import of impeller, and the impeller of this kind of structure has constant voltage output characteristic. The open impeller has simple structure and easy manufacture, and can meet the fire-fighting matching requirement. However, the centrifugal water pump matched with the open impeller in the prior art has relatively low hydraulic efficiency, high running noise and hump-shaped performance curve, and once the output flow of the centrifugal water pump exceeds the rated flow, the lift of the centrifugal water pump is sharply reduced. Head is one of the most important indicators for a fire fighting installation and does not allow for large fluctuations during operation.
Disclosure of Invention
The utility model discloses mainly not enough to prior art, provide a constant voltage vortex pump of configuration semi-open structure impeller, this pump operates steadily, the noise is little, the operating efficiency is high, and the most important hydraulic performance curve is relatively flat, and the lift change is little under rated operating mode promptly.
The utility model discloses a technical goal is realized to following technical scheme.
Constant pressureA vortex pump comprises a pump body, a sealing ring, an impeller, a mechanical seal, a pump cover, a bracket and a motor. The pump cover is connected with the motor into a whole through a bracket. The output shaft end of the motor axially penetrates through the mechanical seal, and the extended shaft section is used for mounting the impeller. The improvement is that: the impeller is a disc-shaped member with a diameter of D2 semi-open structure, and takes 8-12 main blades uniformly distributed on the front surface of a back cover plate and 8-12 auxiliary blades uniformly distributed on the back surface as main bodies, and a layer of front cover plate is additionally arranged at the inlet of all the main blades. The suction end of the front cover plate is in clearance fit with the sealing ring, the outer diameter D4= K1D2 of the front cover plate, and K1 is 0.3-0.4. The main blades are arranged along the axis at an oblique angle a2= 30-40 ° and is uniformly and anticlockwise bent at the diameter D3, and the bending angle a3=150 ° -180 °, D3= K2D2, and K2 is 0.7 to 0.8. The auxiliary blades are half straight blocks, all the auxiliary blades are uniformly distributed in the circumference of D5 and are arranged in the radial direction, D5= K3D2, and K3 is 0.6-0.7.
As a further improvement scheme, the cross sections of the main blade and the auxiliary blade are rectangular, the main blade is a rectangular strip which is gradually thickened from inside to outside, and the length of each main blade is thickened by 1.0-1.5 mm.
As a further improvement scheme, the cross sections of the main blade and the auxiliary blade are oblique parallelograms, the main blade is an oblique parallelogram strip which is gradually thickened from inside to outside, the length of each 100mm is increased by 1.0-1.5 mm, and two side edges are sequentially obliquely arranged by 2-3 degrees.
As a further improvement scheme, the cross sections of the main blade and the auxiliary blade are both trapezoidal, the main blade is a rectangular strip block which is gradually thickened from inside to outside, the length of each main blade is thickened by 1.0-1.5 mm, the narrow side of the trapezoidal main blade is located on the side of the front cover plate, the wide side of the trapezoidal main blade is located on the side of the rear cover plate, and the oblique angle formed by the narrow side and the wide side is 2-3 degrees.
Compared with the prior art, the utility model, following positive effect has:
1. the semi-open impeller has simple structure and does not increase the manufacturing difficulty;
2. the main blades uniformly distributed on the front surface of the rear cover plate of the impeller are arranged along the inclined direction and are bent along the bending direction, and the curved surface blades are favorable for increasing the kinetic energy of liquid flow and create basic conditions for stabilizing the lift;
3. the front cover plate is additionally arranged on the impeller, and the semi-open structure can reduce the eddy loss, so that the operating efficiency of the pump is obviously improved.
Drawings
Fig. 1 is a schematic view of the structure of the present invention in a partial section.
Fig. 2 is a schematic sectional view of the impeller structure of fig. 1.
Fig. 3 is a left side view of fig. 2.
Fig. 4 is a right side view of fig. 2.
Detailed Description
The invention will be further explained with reference to the drawings and the examples.
The constant pressure vortex pump shown in fig. 1 comprises a pump body 1, a sealing ring 2, an impeller 3, a mechanical seal 4, a pump cover 5, a bracket 6 and a motor 7. The suction end of the pump body 1 is provided with a sealing ring 2 matched with an inlet of the impeller 3, a pump cover 5 with a built-in mechanical seal 4 is coaxially and hermetically connected with the pump body 1, and the pump cover 5 is connected with a motor 7 into a whole through a bracket 6. The output shaft end of the motor 7 axially penetrates through the mechanical seal 4, and the protruding shaft end is used for mounting the impeller 3. The impeller 3 is a disc-shaped member with a diameter of D2 semi-open type structure, as shown in fig. 2, 3 and 4, the impeller 3 in this embodiment has a main body consisting of 10 main blades 3.3 uniformly distributed on the front surface of a back cover plate 3.1 and 10 auxiliary blades 3.4 uniformly distributed on the back surface, and a layer of front cover plate 3.2 is additionally arranged at the inlet of all the main blades 3.3. The suction end of the front cover plate 3.2 is in clearance fit with the sealing ring 2, the outer diameter D4= K1D2 of the front cover plate 3.2, D2 is the outer diameter of the impeller 3, and K1 is 0.3-0.4. The main blades 3.3 are arranged along the axis line, the inclined angle a2= 30-40 °, and the rated flow of the embodiment is 30m3And/h, because of the smaller specification, a2 takes a smaller angle, i.e. a2=30 °. In order to further improve the flow behavior, in particular to increase the kinetic energy of the flow, all main blades 3.3 are bent in a uniform manner in the counterclockwise direction at a diameter D3, the bending angle a3=150 °. In addition, the main blades 3.3 are not equalThe thick bar block is a bar block which is gradually thickened from inside to outside and is arranged by thickening 1.0mm per 100mm of length, and the cross section of the main blade 3.3 is rectangular in the embodiment. The auxiliary blade 3.4 is a half-section straight block, the length of the auxiliary blade is shorter than that of the main blade 3.3, in the embodiment, all the auxiliary blades 3.4 arranged on the reverse side of the rear cover plate 3.1 are uniformly distributed and radially arranged in the circumference of d5, and in the pump structure, the auxiliary blade 3.4 generates a certain amount of vortex during the rotation process, so that the axial thrust of the impeller 3 can be counteracted, but the working condition consumes a certain amount of power, and the efficiency of the vortex pump is inevitably reduced. Therefore, the sub-blade 3.4 is not suitable for being too long or too high, and therefore D5= K3D2 and K3=0.7 to 0.9 are most suitable for control, and D5=0.7D2 is most suitable for the smaller specification in the present embodiment.
The utility model provides a main blade 3.3 cross section except for the rectangle in the example, also can be according to putting parallelogram or trapezoidal preparation to one side, its application effect is similar with the example. The values of K1, K2 and K3 are determined mainly according to specifications, and the rated flow is 30m3The smaller value is taken below/h, and the larger value is taken otherwise.
The utility model discloses well core component is the impeller 3 of semi-open structure, and it is supporting with the built-in runner of the pump body 1, and the water source is continuously introduced from the suction end to pump body 1 under the drive of motor 7, and this water source forms the vortex ring through 3 pressure boost speed-ups of rotatory impeller. Under the condition, a part of liquid is output from the built-in flow channel of the pump body 1 along the tangential direction of the vortex, and the other part of liquid continuously enters between the main blades 3.3 of the impeller 3 again in the form of the vortex to increase energy, so that the circulation necessarily achieves the purpose that the output lift keeps constant pressure. In addition, the front cover plate 3.2 plays a role in increasing and stabilizing the suction capacity of the inlet of the main blade 3.3 in the structure and reducing internal leakage, so that the energy loss and noise of the constant-pressure vortex pump are reduced, the hydraulic efficiency of the pump is improved, and meanwhile, the generation of a hump curve under a small-flow working condition is also avoided. Because the two-dimensional performance curve formed by the flow and the lift is relatively flat, the vortex pump operating under the condition can keep the lift stable.
Claims (4)
1. A constant pressure vortex pump comprises a pump body (1), a sealing ring (2), an impeller (3), a mechanical seal (4) and a pump cover (5)A bracket (6) and a motor (7); the suction end of the pump body (1) is provided with a sealing ring (2) matched with an inlet of the impeller (3), a pump cover (5) with a built-in mechanical seal (4) is coaxially and hermetically connected with the pump body (1), and the pump cover (5) is connected with a motor (7) into a whole through a bracket (6); the output shaft end of the motor (7) axially penetrates through the mechanical seal (4), and the extended shaft section is used for mounting the impeller (3); the method is characterized in that: the impeller (3) is a disc-shaped member with a diameter of D2 semi-open structure, and takes 8-12 main blades (3.3) uniformly distributed on the front surface of a rear cover plate (3.1) and 8-12 auxiliary blades (3.4) uniformly distributed on the back surface as main bodies, and a layer of front cover plate (3.2) is additionally arranged at the inlets of all the main blades (3.3); the suction end of the front cover plate (3.2) is in clearance fit with the sealing ring (2), the outer diameter D4= K1D2 of the front cover plate (3.2), and K1 is 0.3-0.4; the main blades (3.3) are arranged along the axis at an angle a2= 30-40 ° and is uniformly and anticlockwise bent at the diameter D3, and the bending angle a3=150 ° -180 °, D3= K2D2, K2 is 0.7-0.8; the auxiliary blades (3.4) are half straight blocks, all the auxiliary blades (3.4) are uniformly distributed in the circumference of D5 and are radially arranged, D5= K3D2, and K3 is 0.6-0.7.
2. The constant pressure vortex pump of claim 1, wherein: the cross sections of the main blade (3.3) and the auxiliary blade (3.4) are rectangular, the main blade (3.3) is a rectangular strip which gradually thickens from inside to outside, and the length of each main blade is thickened by 1.0-1.5 mm.
3. The constant pressure vortex pump of claim 1, wherein: the cross sections of the main blade (3.3) and the auxiliary blade (3.4) are oblique parallelograms, the main blade (3.3) is an oblique parallelogram strip which is gradually thickened from inside to outside, the length of each 100mm is increased by 1.0-1.5 mm, and the two side edges are sequentially obliquely arranged by 2-3 degrees.
4. The constant pressure vortex pump of claim 1, wherein: the cross section of main blade (3.3) and auxiliary blade (3.4) is trapezoidal, and main blade (3.3) is a rectangle strip piece that gradually thickens from inside to outside, and every 100mm length bodiness 1.0 ~ 1.5mm, and trapezoidal main blade (3.3) narrow limit is located front shroud (3.2) side, and the broadside is located back shroud (3.1) side, and the oblique angle that narrow limit and broadside formed is 2 ~ 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920603913.0U CN210531161U (en) | 2019-04-29 | 2019-04-29 | Constant pressure vortex pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920603913.0U CN210531161U (en) | 2019-04-29 | 2019-04-29 | Constant pressure vortex pump |
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| Publication Number | Publication Date |
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| CN210531161U true CN210531161U (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920603913.0U Active CN210531161U (en) | 2019-04-29 | 2019-04-29 | Constant pressure vortex pump |
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| CN (1) | CN210531161U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114076119A (en) * | 2021-07-31 | 2022-02-22 | 高涛 | Centrifugal pump impeller |
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2019
- 2019-04-29 CN CN201920603913.0U patent/CN210531161U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114076119A (en) * | 2021-07-31 | 2022-02-22 | 高涛 | Centrifugal pump impeller |
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Address after: No.9 Jiangyan Avenue, Jiangyan Economic Development Zone, Taizhou City, Jiangsu Province (Jiangsu Zhenhua Haike Equipment Technology Co., Ltd.) Patentee after: Jiangsu Zhenhua Haike Equipment Technology Co., Ltd Address before: 225500 No. 9, Jiangyan Avenue, Jiangyan District, Jiangsu, Taizhou Patentee before: JIANGSU ZHENHUA PUMP MANUFACTURING Co.,Ltd. |