CN201627809U - Impeller nut - Google Patents
Impeller nut Download PDFInfo
- Publication number
- CN201627809U CN201627809U CN2010201626293U CN201020162629U CN201627809U CN 201627809 U CN201627809 U CN 201627809U CN 2010201626293 U CN2010201626293 U CN 2010201626293U CN 201020162629 U CN201020162629 U CN 201020162629U CN 201627809 U CN201627809 U CN 201627809U
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- Prior art keywords
- nut
- impeller
- circular arc
- arc line
- tail
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- Expired - Lifetime
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Abstract
The utility model relates to an impeller nut, which comprises integrated three sections of a nut top, a nut middle and a nut tail. The nut top is ball-shaped. The nut middle close to the nut tail is provided with a flat square through which the nut is easily tightened by a wrench. The surfaces of the nut middle and the nut tail are smoothly transited. Except the flat square, the other positions of the nut middle around the two side lines of a profile of a revolving center is a circular arc line. The circular arc line and a circular arc line of a flow line of a rear cover board for an impeller are located at the same circle. The surfaces of the nut middle and the nut tail are smoothly transited, thereby reducing the impact loss. The shape of the nut middle is identical to that of the flow line of the inlet section of the rear cover board for the impeller, thereby preventing the liquid from swirling herein, reducing the hydraulic loss, improving the pump efficiency and saving the energy.
Description
Technical field
The utility model relates to a kind of nut, specifically refers to a kind of nut that is used to lock the single stage single suction volute pump impeller.
Background technique
In the design of single stage single suction volute pump, the efficient that improves pump is especially crucial.In many factors that influences pump efficiency, the hydraulic loss maximum of pump, room for improvement are also maximum.The design theory of pump does not break through for many years, still based on the monobasic flow theory.Existing computer-aided design, also main experience decision design result by the designer.Therefore the hydraulic efficiency of pump improves slowly, even stagnation, and the hydraulic efficiency that improves pump becomes designer's main brainstorm subject.
In the waterpower design of pump, the designer concentrates on main energy in the design of impeller and spiral case at present, because design theory does not change, design method does not break through, and the hydraulic efficiency of pump improves makes slow progress.In the existing single stage single suction volute pump, impeller is fixed on the axle by impeller nut.Impeller nut is positioned at the impeller inlet place, and the shape of impeller nut directly influences the Flow Field Distribution of carrying liquid, thereby influences the pump hydraulic efficiency, so the design of impeller nut is also very important.Existing impeller nut structure as depicted in figs. 1 and 2, impeller nut top 1 is spherical, can reduce the impact loss of liquid, nut middle part 2 is flat side, is convenient to the spanner fastening nut; Nut afterbody 3 is a plate-like, clamping nut when being convenient to process; The nut center is an internal thread.Its installment state as shown in Figure 3, impeller nut is installed on the axle 5, thus locking impeller 4, but liquid at nut middle part 2 and nut afterbody 3 calmodulin binding domain CaM B places form whirlpool easily, hydraulic loss is increased, efficient reduction, and influence the cavitation performance of pump.
The model utility content
At the prior art above shortcomings, the purpose of this utility model provides and a kind ofly can improve the efficient of single stage single suction volute pump, the impeller nut of energy saving.
The purpose of this utility model is achieved in that a kind of impeller nut, it is made of for three sections integrated nut top, nut middle part and nut afterbody, nut top is a bulb-type, the nut middle part is provided with the flat side of being convenient to the spanner fastening nut near afterbody, it is characterized in that: described nut middle part and the transition of nut top surface smoothing, the sideline, both sides of nut middle part all the other arbitrary position wraparounds except that flat location commentaries on classics section at center is a circular arc line, and the circular arc line of this circular arc line and back shroud of impeller streamline is on the same circle.
Further, described nut middle part and nut top surface binding place are tangent.
The beneficial effects of the utility model are: nut middle part and the transition of nut top surface smoothing can reduce impact loss.In addition, nut middle part shape is consistent with back shroud of impeller inducer streamline shape, prevents that liquid from producing whirlpool herein, thereby reduces hydraulic loss, improves the efficient of pump, energy saving.
Description of drawings
Fig. 1-existing impeller nut structural representation;
A-A sectional view among Fig. 2-Fig. 1;
Fig. 3-existing impeller nut installment state schematic representation;
Fig. 4-the utility model structural representation;
B-B sectional view among Fig. 5-Fig. 4;
Fig. 6-the utility model installment state schematic representation.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
As shown in Figure 4 and Figure 5, the utility model impeller nut, it is made of for 50 3 sections integrated nut top 10, nut middle part 20 and nut afterbody, is provided with internal thread 30 at nut afterbody 50 1 end centers.Nut top 10 is a bulb-type, in order to reduce liquid resistance.Nut middle part 20 is provided with flat side 40 near afterbody, is convenient to the spanner fastening nut.Nut afterbody 50 is cylindrical, clamping nut when being convenient to process.
Improvement of the present utility model is: described nut middle part 20 and nut top 10 surface smoothing transition, actual to add man-hour be by tangent mode transition.The sideline, both sides of nut middle part 20 arbitrary position wraparound except that flat side commentaries on classics section at center is a circular arc line, the circular arc line of this circular arc line and back shroud of impeller streamline is on the same circle, be that nut middle part shape is consistent with back shroud of impeller inducer streamline shape, thereby continuous, the steady change of impeller inlet place flow section have been guaranteed, avoid liquid to produce whirlpool herein, reduced hydraulic loss.
In installation example shown in Figure 6, the utility model is tightened on the pump shaft 5 by spanner, thereby locking impeller 4 is added with packing ring between impeller 4 and the nut.In the pump operation process, flow of liquid owing to adopt spheroidal structure, has reduced liquid flowing resistance through nut top 10.Nut middle part 20 shapes are consistent with impeller 4 back shroud inducer streamline shapes, be to be that two sections circular arcs on the same circle of R form around the rotation of pump shaft 5 center lines by radius, thereby guaranteed the continuous variation of impeller inlet place flow section, avoided liquid to produce whirlpool herein, reduce hydraulic loss, improved pump efficiency.
Basic principle of the present utility model, major character and advantage thereof have more than been described.The utility model can have various changes and modifications, and is not restricted to the described embodiments, and these changes and improvements all belong to protection category of the present utility model.
Claims (2)
1. impeller nut, it is by integrated nut top (10), nut middle part (20) and (50) three sections formations of nut afterbody, nut top (10) is a bulb-type, nut middle part (20) is provided with the flat side (40) of being convenient to the spanner fastening nut near afterbody, it is characterized in that: described nut middle part (20) and nut top (10) surface smoothing transition, the sideline, both sides of nut middle part (20) all the other arbitrary position wraparounds except that flat location commentaries on classics section at center is a circular arc line, and the circular arc line of this circular arc line and back shroud of impeller streamline is on the same circle.
2. impeller nut according to claim 1 is characterized in that: described nut middle part (20) is tangent with nut top (10) surface binding place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201626293U CN201627809U (en) | 2010-04-19 | 2010-04-19 | Impeller nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201626293U CN201627809U (en) | 2010-04-19 | 2010-04-19 | Impeller nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201627809U true CN201627809U (en) | 2010-11-10 |
Family
ID=43059203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201626293U Expired - Lifetime CN201627809U (en) | 2010-04-19 | 2010-04-19 | Impeller nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201627809U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963889A (en) * | 2015-07-01 | 2015-10-07 | 重庆美的通用制冷设备有限公司 | Impeller and driving shaft connecting structure |
| CN105723095A (en) * | 2013-11-12 | 2016-06-29 | 川崎重工业株式会社 | Rotary unit |
| CN107882742A (en) * | 2017-12-13 | 2018-04-06 | 山东昊安金科新材料股份有限公司 | Hydraulic motor immersible pump |
-
2010
- 2010-04-19 CN CN2010201626293U patent/CN201627809U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723095A (en) * | 2013-11-12 | 2016-06-29 | 川崎重工业株式会社 | Rotary unit |
| CN104963889A (en) * | 2015-07-01 | 2015-10-07 | 重庆美的通用制冷设备有限公司 | Impeller and driving shaft connecting structure |
| CN107882742A (en) * | 2017-12-13 | 2018-04-06 | 山东昊安金科新材料股份有限公司 | Hydraulic motor immersible pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101110 |
|
| CX01 | Expiry of patent term |