CN109185224B

CN109185224B - Water pump impeller

Info

Publication number: CN109185224B
Application number: CN201811206718.0A
Authority: CN
Inventors: 刘东方
Original assignee: Jiangxi Lianhua Water Turbine Factory Co ltd
Current assignee: Jiangxi Lianhua Water Turbine Factory Co ltd
Priority date: 2018-10-17
Filing date: 2018-10-17
Publication date: 2020-05-05
Anticipated expiration: 2038-10-17
Also published as: CN109185224A

Abstract

The invention discloses a water pump impeller, which comprises a front cover and a rear cover, wherein a central shaft hole used for being connected with a driving shaft is arranged at the central position of the rear cover, a water inlet is arranged at the position, corresponding to the central shaft hole, on the front cover, and the water pump impeller is characterized in that: leave the interval between protecgulum and the back lid, and be equipped with a plurality of blades between protecgulum and back lid, whole blades are along the circumference evenly distributed in central shaft hole, arbitrary blade respectively with the inside wall of protecgulum and the inside wall fixed connection of back lid, form the rivers passageway that supplies rivers to pass through between two arbitrary adjacent blades, the one end of rivers passageway and the water inlet intercommunication on the protecgulum, the position corresponding to each blade place on the protecgulum is equallyd divide and is do not be equipped with the welding through-hole. The invention provides a water pump impeller which is good in product performance and convenient to produce and process in a split type processing and welding assembly mode.

Description

Water pump impeller

Technical Field

The invention relates to the technical field of water pumps, in particular to a water pump impeller.

Background

The water pump impeller is a component of the inner core of the water pump, and water flow pumping is achieved through rotation of the water pump impeller. The water pump impeller in the prior art generally comprises a front cover, a rear cover and a plurality of blades which are arranged between the front cover and the rear cover and distributed along the circumferential direction, wherein the front cover, the blades and the rear cover are integrally formed through a casting process, so that a water flow channel is formed between any two adjacent impellers. Although the conventional water pump impeller can meet the requirement of actual production, the integral casting process is adopted, so that the product is inevitably provided with more or less sand holes, the strength of the blade is poor, and the blade is damaged after long-term use, which is one of the reasons for limiting the service life of the water pump impeller. In addition, because the surface accuracy of the blade surface and the inner surfaces of the front and rear covers is poor due to the integral casting, the resistance to the flow of water in the water flow channel is large, which not only reduces the efficiency of water flow pumping but also increases the load force of the water pump, thereby causing the actual water supply amount of the water pump with the same power to be obviously less than the theoretical value.

Of course, in the industry, it is also considered that all parts are machined and formed by a machine tool, and then all the parts are fixed by welding, so that the whole impeller is machined. However, because the blades are of an arc structure, the welding gun cannot extend into the water flow channel to weld and fix the blades, and particularly, the depth of the water flow channel of the impeller used on a large-sized water pump is far more than the length of the welding gun in the prior art. Therefore, the welding and fixing of the blade at each position cannot be realized by welding. It is also so that casting is still commonly used to complete the machining of the impeller despite the known deficiencies of casting.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art: the utility model provides a water pump impeller, it not only makes the performance of product good through split type processing then welding assembly's mode, is convenient for produce moreover and process.

Therefore, an object of the present invention is to provide a water pump impeller, which includes a front cover and a rear cover, wherein a central shaft hole for connecting with a driving shaft is provided at a central position of the rear cover, and a water inlet is provided at a position corresponding to the central shaft hole on the front cover, and the water pump impeller is characterized in that: leave the interval between protecgulum and the back lid, and be equipped with a plurality of blades between protecgulum and back lid, whole blades are along the circumference evenly distributed in central shaft hole, arbitrary blade respectively with the inside wall of protecgulum and the inside wall fixed connection of back lid, form the rivers passageway that supplies rivers to pass through between two arbitrary adjacent blades, the one end of rivers passageway and the water inlet intercommunication on the protecgulum, the position corresponding to each blade place on the protecgulum is equallyd divide and is do not be equipped with the welding through-hole. Through the design of the welding through holes, any position of the blade can be welded and fixed with the front cover, so that the technical bottleneck of the existing welding mode in the industry is broken through, and the impeller can be processed and manufactured in the welding mode.

According to an example of the invention, the blade is divided into a front section, a middle section and a rear section along the length direction of the blade, and each welding through hole corresponds to part or all of the middle section of each blade. Through the different sections of design blade to make the size of welding through-hole reduce to the utmost, thereby furthest has reduced the influence that sets up welding through-hole to protecgulum bulk strength and rigidity.

According to an example of the invention, the blade is provided with a convex edge at a position corresponding to the welding through hole, and the convex edge is matched in the welding through hole. The convex edge can play a role in pre-positioning, the usage amount of solder can be reduced, and the strength of the welded blade and the front cover is higher.

According to an example of the invention, a first step surface is arranged in the welding through hole, and a second step surface matched with the first step surface is arranged on the convex edge. Through setting up two step faces of mutually supporting, consequently not only can play the positioning action, the design of bending moreover can reduce the solder greatly and drop to the rivers passageway from the gap of chimb and welding through-hole in to the damage to blade or protecgulum or back lid internal surface has been avoided.

According to an example of the present invention, an annular heat insulating band is disposed between the first step surface and the second step surface to separate a gap between the rim and the welding through hole into a welding section communicating with an external environment and a connection section communicating with the water flow passage. Through the design of the heat insulation belt, the deformation of the inner surface of the front cover or the blade caused by heat generated in the welding process can be effectively avoided, namely, the influence of the thermal deformation on the shape of the water flow channel is reduced to the maximum extent.

According to one example of the invention, the connecting section is filled with a heat-resistant buffer layer, and the heat-resistant buffer layer extends to the position of the orifice of the welding through hole on the lower end face of the front cover and is flush with the lower end face of the front cover. Through designing heat-resisting buffer layer, not only can fill the linkage segment to avoid the continuous gap that strikes the linkage segment place of rivers in the later stage use, can play the effect of lifting the location to the protecgulum before protecgulum and blade welding moreover.

According to one example of the invention, the thermal buffer layer is made of porous asbestos.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

The technical scheme has the following advantages or beneficial effects: the impeller can be assembled by processing the front cover, the blades and the rear cover in a split mode and then welding, so that the precision of a product is good, particularly the precision of the inner surface corresponding to the water flow channel is high, the friction resistance in the water flow flowing process is small, and the energy consumption required by pumping the water flow with the same amount is small.

Drawings

Fig. 1 is a schematic structural view of a water pump impeller of the present invention.

FIG. 2 is a schematic top view of the water pump impeller of the present invention with the front cover removed.

Fig. 3 is a partially enlarged view of the region "a" in fig. 1.

Fig. 4 is a partially enlarged view of the region "B" in fig. 3.

The water inlet and outlet device comprises a front cover 1, a front cover 2, a rear cover 3, a central shaft hole 4, a water inlet 5, blades 5.1, a front section 5.2, a middle section 5.3, a rear section 6, a water flow channel 7, a water outlet 8, a welding through hole 9, a convex edge 10, a first step surface 11, a second step surface 12, a heat insulation belt 13, a welding section 14 and a connecting section.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A water pump impeller according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The first embodiment is as follows:

the invention provides a water pump impeller, which comprises a front cover 1 and a rear cover 2 shown in figure 1, wherein a central shaft hole 3 used for being connected with a driving shaft is arranged at the center of the rear cover 2, a water inlet 4 is arranged at the position, corresponding to the central shaft hole 3, on the front cover 1, a gap is reserved between the front cover 1 and the rear cover 2, a plurality of blades 5 are arranged between the front cover 1 and the rear cover 2, and the blades 5 are streamline, wherein the streamline is that the moving track from any point on the surfaces of the blades 5 along the length direction of the blades 5 is an arc curve. All blades 5 are uniformly distributed along the circumferential direction of the central shaft hole 3, any blade 5 is fixedly connected with the inner side wall of the front cover 1 and the inner side wall of the rear cover 2 respectively, so that a water flow channel 6 for water flow to pass through is formed between any two adjacent blades 5, one end of the water flow channel 6 is communicated with the water inlet 4 on the front cover 1, and the other end of the water flow channel 6 forms a water outlet 7. The positions of the front cover 1 corresponding to the positions of the blades 5 are respectively provided with a welding through hole 8. The welding gun welds the blade 5 and the front cover 1 through the welding through-hole 8 while welding the middle position of the blade 5.

Example two:

the basic structure is the same as the first embodiment, except that: the blade 5 is divided into a front section 5.1, a middle section 5.2 and a rear section 5.3 along the length direction of the blade. Make during the welding process of anterior segment 5.1 and protecgulum 1 of blade 5 for welder to stretch into through the delivery port 7 of rivers passageway 6 and accomplish the welding of anterior segment 5.1 from this, and the rear end 5.3 of blade 5 makes welder stretch into in rivers passageway 6 through water inlet 4 on the protecgulum 1 and accomplish the welding between the back end 5.3 and the protecgulum 1 of blade 5 from this, make welder stretch into to the welding between 5.2 the position of middle section 5.2 of blade 5 and the welding of protecgulum 1 in the middle section 5.2 of blade 5 from the welding through-hole 8 on the protecgulum 1 at last, and make welding through-hole 8 closed at the in-process of welding middle section 5.2, utilize the solder to fill sealed welding through-hole 8 promptly.

Example three:

the basic structure is the same as the embodiment, and the difference is that: the welding through holes 8 correspond to the whole blade 5, namely the welding process of the whole blade 5 close to one side of the front cover 1 is realized through the welding through holes 8. The mode is suitable for the condition that the positions of the water inlet 4 and the water outlet 7 are small or other accessories cannot pass through the welding gun. Therefore, it is within the scope of the present application that the welding of the blade 5 to the front cover 1 is achieved by welding the through hole 8 partially or entirely.

Example four:

the basic structure is the same as the embodiment, and the difference is that: be equipped with chimb 9 corresponding to the position of welding through-hole 8 on the blade 5, chimb 9 cooperates in welding through-hole 8, can accomplish the welded fastening of blade 5 and protecgulum 1 through the clearance between welded fastening chimb 9 and the welding through-hole 8 to make the clearance between chimb and the welding through-hole 8 sealed.

Example five:

the basic structure is the same as the fourth embodiment, and the difference is that: the welding through hole 8 is located under the protecgulum 1 on the terminal surface the drill way position expand outward along the horizontal direction and form first step face 10, be equipped with on the chimb 9 with first step face 10 matched with second step face 11. The first step surface 10 and the second step surface 11 are matched, so that solder heated and liquefied in the welding process cannot drip onto the blade 5 from a gap between the convex edge 9 and the inner side wall of the welding through hole 8, and the surface of the blade 5 is damaged.

Example six:

the basic structure is the same as that of the fifth embodiment, and the difference is that: an annular heat insulation belt 12 is arranged on the first step surface 10 or the second step surface 11, and the heat insulation belt 12 separates a gap between the convex edge 9 and the welding through hole 8 into a welding section 13 communicated with the external environment and a connecting section 14 communicated with the water flow channel 6. Specifically, the heat insulating belt 12 is coated with a heat insulating material for blocking heat transfer, such as asbestos. Through the heat insulation material, the lower end faces of the blade 5 and the front cover 1 can be prevented from being heated and deformed due to heat in the welding process, and solder in a fluid state after being heated can be prevented from dripping on the blade 5 or flowing on the lower end face of the front cover 1 to form a bulge.

Example seven:

the basic structure is the same as in example six, except that: the heat insulation belt 12 means that the first step surface 10 and/or the second step surface 11 are/is recessed inwards to form an annular groove, and the groove is filled with heat insulation materials for blocking heat transfer.

Example eight:

the basic structure is the same as in example six, except that: the connecting section 14 is filled with a heat-resistant buffer layer, and the heat-resistant buffer layer extends to the position of the welding through hole 8 close to the lower end face of the front cover 1 and is flush with the lower end face of the front cover 1. The heat-resistant buffer layer is made of porous asbestos materials. The connection section 14 can be filled with the heat-resistant buffer layer, so that the lower end face of the front cover 1 and the blade 5 are in continuous transition, and the water flow is prevented from impacting a gap where the connection section is located. In addition, the heat-resistant buffer layer has certain elasticity, so that when the front cover 1 is installed and the position of the front cover 1 is adjusted, the front cover 1 can be lifted by the heat-resistant buffer layer, and the front cover 1 is prevented from directly colliding with the blade 5 to damage the blade 5.

Based on the structure of the water pump impeller, the embodiment of the processing process is as follows:

example nine:

the invention provides a water pump impeller, which has the same structure as the first embodiment and is characterized in that: the processing process comprises the following steps:

and S1, uniformly distributing the blades 5 along the circumferential direction of the central shaft hole on the rear cover 2, and welding and fixing the blades 5 and the rear cover 2.

And S2, covering the front cover 1 above the blades 5 from top to bottom.

S3, adjusting the front cover 1 so that each of the welding through-holes 8 on the front cover 1 corresponds to each of the blades 5, and then positioning the front cover 1 on the rear cover 2. The term of positioning as described above means that the front cover 1 and the rear cover 2 are fixed in relative position, that is, the rear cover 2 and the blades 5 welded to the rear cover 2 are stationary relative to the front cover 1, and in this process, the rear cover 2 and the front cover 1 can be clamped on the positioning brackets through the positioning brackets, and the front cover 1 and the rear cover 2 can be detachably fixed by the clamps.

And S4, welding and fixing part or all of the blade 5 and the front cover 1 through the welding through hole 8. Of course, if the middle portion of the blade 5 is welded and fixed by welding the through hole 8, the front end of the blade 5 needs to be welded by the water outlet 7 of the blade 5 located in the water flow channel 6 and the rear end of the blade 5 needs to be welded by the water inlet 4 of the front cover 1, and finally the whole blade 5 is welded. It can be easily seen that, when the length and the position of the welding through hole 8 are designed, the structural size of the impeller is required to be combined, and the design of the welding through hole 8 inevitably damages the integrity of the front cover 1, so that the welding through hole 8 is not required to be arranged when the partial region of the blade 5 is welded by adopting the structures of the impeller, such as the water inlet 4 on the front cover 1, the water outlet 7 of the water flow channel 6 and the like, and only the position where a welding gun cannot be welded needs to be welded by arranging the welding through hole 8 to realize the welding fixation of the blade 5 and the front cover 1.

Further, in the process of welding the blade 5 and the front cover 1 through the welding through-hole 8, the welding through-hole 8 needs to be filled so that the welding through-hole 8 is sealed.

Example nine:

the basic steps are the same as those in the eighth embodiment, except that: step S5 is provided between the above steps S1 and S2, and a plurality of spacers are provided on the rear cover 2, all of the spacers being provided at intervals in the circumferential direction of the central axial hole in the rear cover 2. At this time, in step S2, when the front cover 1 covers the blade 5 from top to bottom, the front cover 1 abuts against the blade 5 or a gap is left between the front cover 1 and the blade 5. The cushion block can prevent the partial stress position of the blade 5 from bending due to the self weight of the front cover 1 when the front cover 1 covers the blade 5.

Example ten:

the basic steps are the same as those in the ninth embodiment, except that: the step S3 includes the steps of:

s31, adjusting the front cover 1 to enable each welding through hole 8 on the front cover 1 to correspond to each corresponding blade 5;

s32, placing the clamp between the front cover 1 and the rear cover 2 from the water inlet 4 on the front cover 1, fixedly connecting a chuck at one end of the clamp with a central shaft hole on the rear cover 2, and fixedly connecting a chuck at the other end of the clamp with a side wall of the front cover 1 at the position of the water inlet 4. Above-mentioned anchor clamps can adopt multiple conventional anchor clamps among the prior art, and the expansible of mechanical type for example realizes pressing from both sides tightly with shrink chuck cooperation connecting rod, also can adopt the chuck of formula of inhaling, utilizes the fixed protecgulum 1 of the magnetic attraction of strong magnetism, and the chuck that corresponds on the back lid 2 can adopt the bolt, original being used for on bolt and the central shaft hole with drive shaft fixed connection's bolt hole tight fit. Therefore, the specific implementation of the above-mentioned clamp is not limited to an example, and the core of the clamp is to achieve temporary fixing of the front cover 1 and the rear cover 2 by using the existing clamping mechanism, and to facilitate detachment after welding.

It should be noted that, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. Therefore, the appended claims should be construed to cover all such variations and modifications as fall within the true spirit and scope of the invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to be within the intent and scope of the present invention.

Claims

1. The utility model provides a water pump impeller, it includes protecgulum (1) and hou gai (2), the central point of back lid (2) puts and is equipped with central shaft hole (3) that are used for with the actuating shaft to be connected, the position that corresponds central shaft hole (3) on protecgulum (1) is equipped with water inlet (4), its characterized in that: a space is reserved between the front cover (1) and the rear cover (2), a plurality of blades (5) are arranged between the front cover (1) and the rear cover (2), all the blades (5) are uniformly distributed along the circumferential direction of the central shaft hole (3), any blade (5) is fixedly connected with the inner side wall of the front cover (1) and the inner side wall of the rear cover (2) respectively, a water flow channel (6) for water flow to pass through is formed between any two adjacent blades (5), one end of the water flow channel (6) is communicated with a water inlet (4) on the front cover (1), and welding through holes (8) are formed in positions, corresponding to the blades (5), on the front cover (1);

the blade (5) is divided into a front section (5.1), a middle section (5.2) and a rear section (5.3) along the length direction of the blade, and each welding through hole (8) corresponds to part or all of the middle section (5.2) of each blade (5);

a convex edge (9) is arranged on the blade (5) corresponding to the welding through hole (8), and the convex edge (9) is matched in the welding through hole (8);

a first step surface (10) is arranged in the welding through hole (8), and a second step surface (11) matched with the first step surface (10) is arranged on the convex edge (9);

an annular heat insulation belt (12) is arranged between the first step surface (10) and the second step surface (11) so that a gap between the convex edge (9) and the welding through hole (8) is divided into a welding section (13) communicated with the external environment and a connecting section (14) communicated with the water flow channel (6);

the connecting section (14) is filled with a heat-resistant buffer layer, and the heat-resistant buffer layer extends to the orifice position of the lower end face of the front cover (1) of the welding through hole (8) and is flush with the lower end face of the front cover (1).

2. The water pump impeller of claim 1, wherein: the heat-resistant buffer layer is made of porous asbestos.