阅读说明：本技术 一种可调节叶轮机构 (Adjustable impeller mechanism ) 是由 胡凯 孔吉令 于 2020-06-30 设计创作，主要内容包括：本发明涉及一种可调节叶轮机构,包括叶轮主体、调节旋板和多个调节叶片；叶轮主体包括叶轮盖板和主体叶片,主体叶片沿叶轮盖板径向均匀环形分布,叶轮盖板上设有多条第一导向槽,调节旋板上均匀分布有第二导向槽,该第二导向槽为曲线槽,每个调节叶片包括叶片板、导杆和限位块,叶片板一端嵌入主体叶片中,成为主体叶片的延伸,导杆的一端连接叶片板的底侧,另一端依次穿过第一导向槽和第二导向槽后连接限位块。与现有技术相比,本发明通过机械结构进行调节,使叶片的外圆直径能够方便快捷地进行改变,变化可以重复多次,实现增加叶片外径或者减小叶片外径,不会损伤其他零件,操作简单,适应性更加广。(The invention relates to an adjustable impeller mechanism, which comprises an impeller main body, an adjusting rotary plate and a plurality of adjusting blades, wherein the impeller main body is provided with a plurality of blades; the impeller main part includes impeller apron and main part blade, the radial even annular distribution of main part blade edge impeller apron, be equipped with many first guide slots on the impeller apron, it has the second guide slot to adjust evenly distributed on the spiral plate, this second guide slot is the curve groove, every adjusting vane includes the lamina plate, guide arm and stopper, during lamina plate one end imbeds the main part blade, become the extension of main part blade, the bottom side of lamina plate is connected to the one end of guide arm, the stopper is connected after the other end passes first guide slot and second guide slot in proper order. Compared with the prior art, the blade outer diameter adjusting mechanism is adjusted through a mechanical structure, so that the outer diameter of the blade can be conveniently and quickly changed, the change can be repeated for many times, the increase of the outer diameter of the blade or the reduction of the outer diameter of the blade can be realized, other parts cannot be damaged, the operation is simple, and the adaptability is wider.)

1. An adjustable impeller mechanism is characterized by comprising an impeller main body (1), an adjusting rotary plate (2) and a plurality of adjusting blades (3);

the impeller main body (1) comprises an impeller cover plate (11) and main body blades (12), the main body blades (12) are uniformly distributed in an annular shape along the radial direction of the impeller cover plate (11), a plurality of first guide grooves (11a) are formed in the impeller cover plate (11), each first guide groove (11a) and one main body blade (12) are arranged in a collinear mode, one end, far away from the axis of the impeller cover plate (11), of each main body blade (12) extends to the edge of the impeller cover plate (11), and meanwhile the first guide grooves (11a) and the main body blades (12) are partially overlapped to enable the main body blades (12) to form limiting grooves (11 b);

second guide grooves (21) are uniformly distributed on the adjusting rotary plate (2), the second guide grooves (21) are curved grooves, and the positions of the second guide grooves correspond to those of the first guide grooves (11 a); the impeller cover plate (11) is provided with a plurality of positioning holes (13), the adjusting rotary plate (2) is provided with at least two through holes (22), and the adjusting rotary plate (2) and the impeller cover plate (11) are fixed by bolts (4) penetrating through the through holes (22) to be connected with the positioning holes (13);

each adjusting blade (3) comprises a blade plate (31), a guide rod (32) and a limiting block (33), one end of the blade plate (31) is embedded into the limiting groove (11b) and becomes an extension of the main body blade (12), one end of the guide rod (32) is connected with the bottom side of the blade plate (31), and the other end of the guide rod sequentially penetrates through the first guide groove (11a) and the second guide groove (21) and then is connected with the limiting block (33).

2. An adjustable impeller mechanism according to claim 1, wherein the through hole (22) of each adjusting rotating plate (2) corresponds to a plurality of positioning holes (13) arranged at intervals on the impeller cover plate (11), and when the adjusting rotating plate (2) rotates a certain angle coaxially with the impeller cover plate (11), the same through hole (22) corresponds to an adjacent new positioning hole (13).

3. An adjustable impeller mechanism according to claim 1, wherein the edges of the second guide groove (21) are provided with graduation marks.

4. An adjustable impeller mechanism according to claim 1, characterized in that the first guide groove (11a) extends to the edge of the through impeller cover plate (11) and the second guide groove (21) extends to the edge of the through adjustment screw plate (2).

5. An adjustable impeller mechanism according to claim 1, wherein the stopper (33) and the guide rod (32) are threadedly connected.

6. An adjustable impeller mechanism according to claim 1, wherein the width of the retaining groove (11b) in the main body vane (12) is greater than the width of the first guide groove (11 a).

7. An adjustable impeller mechanism according to claim 1, characterized in that the main body blades (12) and the adjusting blades (3) are located at the same vertical height on the impeller cover plate (11).

8. An adjustable impeller mechanism according to claim 1, characterized in that the adjusting rotating plate (2) is a circular plate.

9. An adjustable impeller mechanism according to claim 1, wherein the impeller body (1) comprises at least two body impellers (12).

10. The adjustable impeller mechanism according to claim 1, characterized in that the impeller body (1) is provided with a mounting hole (5) at the center for connecting a pump shaft, and the pump shaft and the mounting hole (5) are connected by a key.

Technical Field

The invention relates to the field of fluid machinery, in particular to an adjustable impeller mechanism.

Background

In a rotary machine such as a vane pump and a water turbine, an impeller is the most important working element. According to the theoretical knowledge of the water pump, the excircle diameter D of the blade in the impeller₂When the water pump is used, the water pump isA very important geometrical parameter, the pump head H and the diameter D of the outer circle of the water pump₂The following relationships exist: h-₂ ². Since the method of cutting the outer diameter of the blade is the most economical and practical method in practice (the impeller is produced in batch and is not generally customized), in practical application, the outer diameter D of the blade is often cut₂The method is suitable for the working conditions of water pumps with different performances. The specific steps of cutting the outer diameter of the blade are as follows: the impeller nut is disassembled, the impeller is disassembled from the pump shaft, the disassembled impeller is clamped on a lathe to be machined, after machining is completed, deburring, chamfering machining, dynamic and static balance testing and de-weighting treatment are carried out again, and finally the impeller nut is assembled on the pump shaft to carry out overall assembly of the water pump and continue to put the water pump into use.

In summary, the outer diameter D of the cutting blade₂There are the following problems: 1. the actual steps are very complicated, the operation process is complex, and the impeller structure can be damaged even in the cutting process. 2. The cutting precision is difficult to master, and repeated assembly and test are needed, so that the operation difficulty is improved. 3. The overall operation is irreversible, and once the calculation misoperation occurs, the whole impeller is scrapped, so that waste is caused.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide an adjustable impeller mechanism, the outer diameter of an impeller can be directly adjusted without disassembly through a mechanical structure, the operation is simple, and the applicability is strong.

The purpose of the invention can be realized by the following technical scheme:

an adjustable impeller mechanism comprises an impeller main body, an adjusting rotary plate and a plurality of adjusting blades;

the impeller main body comprises an impeller cover plate and main body blades, the main body blades are uniformly and annularly distributed along the radial direction of the impeller cover plate, a plurality of first guide grooves are formed in the impeller cover plate, each first guide groove and one main body blade are arranged in a collinear mode, one end, far away from the axis of the impeller cover plate, of each main body blade extends to the edge of the impeller cover plate, and meanwhile the first guide grooves and the main body blades are partially overlapped to enable limiting grooves to be formed in the main body blades;

second guide grooves are uniformly distributed on the adjusting rotary plate, are curved and correspond to the first guide grooves in position; the impeller cover plate is provided with a plurality of positioning holes, the adjusting rotary plate is provided with at least two through holes, and the adjusting rotary plate and the impeller cover plate are fixed by bolts penetrating through the through holes to be connected with the positioning holes;

each adjusting blade comprises a blade plate, a guide rod and a limiting block, one end of the blade plate is embedded into the limiting groove and becomes an extension of the main blade, one end of the guide rod is connected with the bottom side of the blade plate, and the other end of the guide rod is connected with the limiting block after sequentially penetrating through the first guide groove and the second guide groove.

Furthermore, the through hole on each adjusting rotary plate can correspond to a plurality of positioning holes arranged at intervals on the impeller cover plate, and after the adjusting rotary plate rotates for a certain angle relative to the same axis of the impeller cover plate, the same through hole corresponds to one adjacent new positioning hole.

Furthermore, the edge of the second guide groove is provided with scale marks.

Furthermore, the first guide groove extends to the edge penetrating through the impeller cover plate, and the second guide groove extends to the edge penetrating through the adjusting rotary plate

Furthermore, the limiting block and the guide rod are connected through threads.

Further, the width of the limiting groove on the main body blade is larger than that of the first guide groove.

Further, the main body blade and the adjusting blade are located at the same vertical height on the impeller cover plate.

Furthermore, the adjusting rotary plate is a circular plate.

Further, the impeller body comprises at least two body impellers.

Furthermore, the impeller main body is provided with a mounting hole in the center for connecting a pump shaft, and the pump shaft and the mounting hole are in key connection.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the design of the impeller main body, the adjusting rotary plate and the plurality of adjusting blades, the outer diameter of the blades can be adjusted under the condition of not disassembling the impeller, the operation is simple and rapid, and the operation time and the disassembly and assembly cost are saved; meanwhile, the service life of the parts can be effectively prolonged due to the fact that disassembly is avoided, and loss of spare parts is reduced.

2. According to the invention, the structure fixation of the adjusting rotary plate and the impeller cover plate is realized through the arrangement of the through hole on the adjusting rotary plate and the positioning hole on the impeller cover plate, the required outer diameter of the blade can be obtained only by rotating the adjusting rotary plate according to requirements during use, and the operation process is simple.

3. The edge of the second guide groove is provided with scale marks, which is helpful for users to intuitively know the rotation angle of the adjusting rotary plate, and further accurately adjust and control the outer diameter of the blade.

4. The invention can carry out reversible operation, the outer diameter of the blade can be adjusted to be larger or smaller, the blade can be increased or decreased at will, the blade can be freely switched, and the applicability is strong.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural view of another embodiment of the present invention.

Fig. 3 is a schematic side cross-sectional view of the present invention.

Fig. 4 is a schematic structural view of the impeller body.

Fig. 5 is a rear view of the impeller body.

Fig. 6 is a schematic structural view of the adjusting rotary plate.

Fig. 7 is a schematic structural view of the regulating blade.

Reference numerals: 1. impeller main part, 11, impeller apron, 11a, first guide way, 11b, spacing groove, 12, main part blade, 13, locating hole, 2, adjust the rotating plate, 21, second guide way, 22, through-hole, 3, adjusting vane, 31, blade board, 32, guide arm, 33, spacing piece, 4, bolt, 5, mounting hole.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1 to 6, the present embodiment provides an adjustable impeller mechanism, which includes an impeller main body 1, an adjusting rotating plate 2 and a plurality of adjusting blades 3, wherein a mounting hole 5 for connecting a pump shaft is formed in the center of the impeller main body 1, and the pump shaft and the mounting hole 5 are connected through a key.

The impeller body 1 includes an impeller cover plate 11 and body blades 12. The main body blades 12 are uniformly distributed along the radial direction of the impeller cover plate 11 in an annular mode. The impeller cover plate 11 is provided with a plurality of first guide grooves 11a, each first guide groove 11a and one main body blade 12 are arranged in a collinear manner, and extend from one end of the main body blade 12 far away from the axle center of the impeller cover plate 11 to the edge of the impeller cover plate 11. Meanwhile, the first guide groove 11a and the main body blade 12 are partially overlapped, so that a limit groove 11b is formed on the main body blade 12. The width of the limiting groove 11b on the main body blade 12 is 2-3 mm larger than that of the first guide groove 11 a. The number of body impellers 12 is typically at least two, with six body impellers 12 in this embodiment.

The adjusting rotary plate 2 is a circular ring-shaped plate, and second guide grooves 21 are uniformly distributed on the adjusting rotary plate 2. The second guide groove 21 is a curved groove and is positioned to correspond to the first guide groove 11 a. The specific track of the curve groove is designed according to certain parameters, and the whole width is kept consistent. The adjusting rotary plate 2 is provided with a through hole 22, and the impeller cover plate 11 is provided with a positioning hole 13. The bolt 4 passes through the through hole 22 and the positioning hole 13 so that the adjusting rotary plate 2 and the impeller cover plate 11 are coaxially fixed. The number of the through holes 22 is at least two, which is used to ensure that the adjusting rotary plate 2 and the impeller cover plate 11 do not move. The through hole 22 of each impeller cover plate 11 can correspond to a plurality of positioning holes 13 arranged at intervals on the adjusting rotary plate 2, and after the adjusting rotary plate 2 rotates for a certain angle relative to the same axis of the impeller cover plate 11, the same through hole 22 corresponds to one new adjacent positioning hole 13. The positioning holes 13 in fig. 5 are schematic views, and the positioning holes 13 may be distributed in a plurality of circles. The edge of the second guide groove 21 is also provided with scale marks, which is convenient for visually knowing the rotation angle of the adjusting rotary plate 2, and further accurately adjusting and controlling the outer diameter of the blade.

As shown in fig. 7, each of the adjustment blades 3 includes a blade plate 31, a cylindrical guide rod 32, and a stopper 33. One end of the blade plate 31 is fitted into the stopper groove 11b, and the main blade 12 and the adjustment blade 3 have the same height perpendicular to the impeller shroud 11, and extend as the main blade 12. One end of the guide rod 32 is connected to the bottom side of the vane plate 31, and the other end thereof passes through the first guide groove 11a and the second guide groove 21 in sequence and then is connected to the stopper 33.

In this embodiment, the first guide groove 11a extends through the edge of the impeller cover plate 11, and the second guide groove 21 extends through the edge of the adjusting rotary plate 2, so that the adjusting blade 3 has a larger telescopic adjustment range. The limiting block 33 and the guide rod 32 are connected through threads, so that the adjusting blade 3 and the two guide grooves can be conveniently mounted and dismounted.

The working principle of the embodiment is as follows:

according to the working principle of the cam mechanism, the guide rod 32 of the adjusting blade 3 is arranged in the first guide groove 11a of the main body impeller 12, and the blade plate 3 is embedded in the limiting groove 11b, so that the adjusting blade 3 can perform linear centripetal motion along the first guide groove 11 a; meanwhile, the guide rod 32 is also arranged in the second guide groove 21 of the adjusting rotary plate 2, when the adjusting rotary plate 2 is rotationally adjusted, the guide rod 32 carries out curvilinear motion relative to the second guide groove 21, and under the superposition of the two motions, the adjusting blade 3 finally realizes linear centripetal motion. That is, when the outer diameter is adjusted, it is only necessary to rotate the adjusting rotary plate 2 relative to the impeller cover plate 11. At this time, the guide rod 32 moves along the first guide groove 11a under the driving of the second guide groove 21, and the regulating blade 3 also moves radially in the limiting groove 11b of the main blade 12, so as to change the outer diameter of the whole blade.

The impeller cover plate 11 and the adjusting rotary plate 2 are fastened with each other through bolts 4, a through hole 22 is formed in the adjusting rotary plate 2, and a positioning hole 13 is formed in the impeller cover plate 11. The positioning holes 13 are annularly distributed according to the minimum fixed angle theta (when the adjusting rotary plate 2 rotates one minimum fixed angle theta each time, the outer diameter D of the adjusting blade 3 is adjusted₂A constant delta D is changed, so that when the impeller is used in engineering, the outer diameter of the blade 3 can be adjusted according to the conversion relation, accurate adjustment is realized), the number of the positioning holes 13 is set along with the adjustment quantity of each impeller, and each impeller is ensured to be adjustedThe positioning holes 13 can correspond to a through hole 22 on the adjusting rotary plate 2, so as to realize the fastening after the rotation.

The embodiment has the following advantages:

(1) and does not need to be disassembled: the mechanical structure of the embodiment can adjust the outer diameter of the blade under the condition of not disassembling the impeller, is simple and quick to operate, and saves the operation time and the disassembly and assembly cost; (2) the operation process is simple: the required outer diameter of the blade can be obtained only by rotating and adjusting the rotary plate according to the conversion relation according to the requirement, and the method is simple and clear; compared with the traditional structure, the structure reduces the operation steps of cutting, dynamic and static balance test and the like; (3) and the service life is prolonged: when parts such as the shaft and the mechanical seal are used under the structure, the parts cannot be damaged due to disassembly, the service life of the parts is prolonged, and the loss of spare parts is reduced. (4) And the precision is high: even if the adjustment is carried out for a plurality of times, the shapes and the performances of other parts are not influenced, and the design target can be matched to the maximum extent when the device is used. (5) The operation is reversible, and the adaptability is high: the outer diameter of each blade can be adjusted to be large or small, the blades can be increased or decreased at will and can be switched freely, and one impeller can be reused on a changed engineering site.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.