CN211288217U - Impeller shaft handle anti-abrasion structure for deep well pump - Google Patents

Abstract

The utility model relates to the technical field of machinery, a impeller arbor abrasionproof decreases structure for deep-well pump is provided, including the impeller shaft, a plurality of series connection set up the water conservancy diversion apron on impeller epaxial impeller and every impeller, the impeller passes through the arbor and closes with the impeller shaft cover, every arbor is including the lower extension that is located the last extension on impeller upper portion and is located the impeller lower part, wherein goes up the extension and is less than the step shape of lower part diameter for the upper portion diameter, the less position of diameter and a pot head transition fit on the step shape of this arbor, the inboard cover of water conservancy diversion apron is equipped with the stainless steel inserts, this stainless steel inserts and axle sleeve clearance fit. Through the setting of axle sleeve, form the protection to the handle, prevent its wearing and tearing to do not influence the intensity of handle.

Description

Impeller shaft handle anti-abrasion structure for deep well pump

Technical Field

The utility model belongs to the technical field of machinery, a impeller structure is related to, especially, relate to an impeller shaft handle abrasionproof decreases structure suitable for deep-well pump.

Background

The deep well pump, also known as submersible pump, is an important equipment for pumping water from deep well. The deep well pump is provided with a multi-stage impeller assembly. Because the deep well pump impeller level is more, impeller shaft length is longer, and in the long-term use, plastics impeller shaft handle and the stainless steel inserts friction in the water conservancy diversion apron, plastics impeller shaft handle upper end wearing and tearing are comparatively serious, lead to the clearance grow, and a large amount of water leaks from between impeller shaft handle and the water conservancy diversion apron under the effect of pressure differential, causes pressure and flow loss, and the performance reduces, influences the water pump life-span.

Disclosure of Invention

The utility model aims at the problems and provides an impeller shaft handle anti-abrasion structure for a deep well pump; the technical problem that the impeller shaft handle is easy to wear in the prior art is solved.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the utility model provides an impeller arbor abrasionproof decreases structure for deep-well pump creatively, including the impeller shaft, a plurality of series connection set up the water conservancy diversion apron on epaxial impeller of impeller and every impeller, the impeller passes through the arbor and closes with the impeller shaft cover, every arbor is including the lower extension section that extends section and be located the impeller lower part on being located the impeller upper portion, wherein goes up the extension section and be less than the step of lower part diameter for the upper portion diameter, the less position of diameter and a pot head transition fit on the step of this arbor, the inboard cover of water conservancy diversion apron is equipped with the stainless steel inserts, this stainless steel inserts and axle sleeve clearance fit.

In the impeller shaft handle anti-abrasion structure for the deep-well pump, the inner side of the flow guide cover plate is provided with an inward arc-shaped convex part, and the stainless steel insert is an arc-shaped insert matched with the arc-shaped convex part.

In the above-mentioned impeller shaft shank anti-wear structure for deep-well pump, the shaft sleeve is a rubber shaft sleeve.

In the above-mentioned impeller arbor abrasionproof structure for deep-well pump, the lateral wall diameter of axle sleeve is crescent from top to bottom.

In the above-mentioned impeller shaft shank abrasion-proof structure for deep-well pump, the minimum outer diameter of the rubber shaft sleeve is greater than the outer diameter of the lower extension section of the shaft shank.

In the impeller shaft handle abrasion-proof structure for the deep-well pump, the shaft sleeve is formed by mutually combining the fluororubber layer, the glass fiber layer and the butadiene-acrylonitrile rubber layer from inside to outside respectively.

In foretell an impeller shaft handle abrasionproof decreases structure for deep-well pump, the water conservancy diversion apron upwards extends near arc convex part position and is equipped with annular protruding muscle, and the top of this annular protruding muscle is higher than the shaft handle top with this water conservancy diversion apron complex, and forms the arc transition between the medial surface of annular protruding muscle and the bottom plate of water conservancy diversion apron.

In the above-mentioned impeller shaft handle anti-wear structure for a deep-well pump, the upper surface of the bottom plate of the flow guide cover plate is an inclined plane gradually descending from inside to outside.

In the above-mentioned impeller shaft handle abrasionproof decreases structure for deep-well pump, still include the spiral case, the spiral case cover is located the lower extension section outside of shaft handle, and this spiral case and water conservancy diversion apron enclose the impeller in the middle part cavity.

In the above-mentioned impeller shank anti-wear structure for a deep-well pump, a bent portion is formed in the lower surface of the blade of the impeller, and a rib is provided on the outer side of the bent portion.

Compared with the prior art, the utility model has the advantages of:

1) due to the arrangement of the shaft sleeve, the shaft handle is protected and prevented from being abraded, and the strength of the shaft handle is not influenced.

2) The stainless steel inserts are arc inserts matched with the arc convex parts, and the friction area is reduced through the contact of the arc surfaces and the shaft sleeve, so that the damage is reduced, and the flexibility of the rotation of the shaft handle is improved.

3) Through the design to the axle sleeve material, improve the durability and the wearability of axle sleeve greatly, make it have high strength, long service life.

Drawings

Fig. 1 is a schematic structural diagram provided by the present invention.

Fig. 2 is a partially enlarged schematic view of fig. 1.

Fig. 3 is a schematic structural diagram of the shaft sleeve according to an embodiment of the present invention.

In the figure, an impeller shaft 1, an impeller 2, a shaft shank 20, an upper extension section 200, a lower extension section 201, a shaft sleeve 21, a fluororubber layer 210, a glass fiber layer 211, a nitrile rubber layer 212, a bent part 22, ribs 23, a flow guide cover plate 3, an arc-shaped convex part 30, a stainless steel insert 31, an annular convex rib 32, a bottom plate 33 and a volute 4.

Detailed Description

As shown in fig. 1, an impeller shaft 1 handle anti-abrasion structure for a deep well pump comprises an impeller shaft 1, a plurality of impellers 2 connected in series on the impeller shaft 1, a flow guide cover plate 3 arranged on each impeller 2, and a volute 4 sleeved on the lower part of the impeller 2.

Specifically, referring to fig. 1 and 2, the impeller 2 is sleeved with the impeller shaft 1 through the shaft handle 20, the central hole of the impeller 2 is matched with the shaft handle 20 according to H7/H6, each shaft handle 20 comprises an upper extension section 200 positioned at the upper part of the impeller 2 and a lower extension section 201 positioned at the lower part of the impeller 2, wherein the upper extension section 200 is in a step shape with an upper diameter smaller than that of the lower part, the part with the smaller upper diameter of the step shape of the shaft handle 20 is in transition fit with a shaft sleeve 21, i.e. the shaft sleeve 21 is tightly sleeved with the shaft handle 20 to form a fixed structure, and the shaft sleeve 21 does not directly act on the impeller 2 under the stress state through the step-shaped design, so that the upper extension section 200 of the shaft handle 20 has. The outside wall diameter of axle sleeve 21 from top to bottom crescent, wherein the maximum diameter differs 0.2mm to 1.8mm with minimum diameter, and the minimum internal diameter in shaft hole of water conservancy diversion apron 3 is less than this axle sleeve 21's maximum diameter, and axle sleeve 21 and the shaft hole cooperation of water conservancy diversion apron 3 form limit structure, prescribe a limit to 2 unsteady of impeller.

The inner wall of the shaft hole at the inner side of the flow guide cover plate 3 is provided with a stainless steel insert 31, the stainless steel insert 31 is in clearance fit with the shaft sleeve 21, so that the impeller 2 is sleeved in the inner hole of the flow guide cover plate 3 by the shaft handle 20 to rotate, and the inner side edge of the flow guide cover plate 3 has higher strength through the stainless steel insert 31.

Preferably, the inward arc-shaped convex part 30 is arranged on the inner side of the shaft hole of the flow guide cover plate 3, the stainless steel insert 31 is an arc-shaped insert matched with the arc-shaped convex part 30, and the friction area is reduced by the contact of the arc-shaped surface and the shaft sleeve 21, so that the damage is reduced, and the flexibility of the rotation of the shaft handle 20 is improved.

Preferably, the minimum outer diameter of the rubber bushing 21 is larger than the outer diameter of the lower extension 201 of the arbor 20, so that the size of the arbor 20 is not reduced, and the upper and lower extensions 201 of the arbor 20 have a stable structure.

Preferably, as shown in fig. 1, the volute 4 is sleeved outside the lower extension 201 of the shaft handle 20, and the volute 4 and the flow guiding cover plate 3 enclose the impeller 2 in the middle cavity. The water conservancy diversion apron 3 is close to the protruding 30 positions of arc and upwards extends and is equipped with annular protruding muscle 32, and the top of this annular protruding muscle 32 is higher than 20 tops of this water conservancy diversion apron 3 complex arbor, and forms the arc transition between the medial surface of annular protruding muscle 32 and the bottom plate 33 of water conservancy diversion apron 3, and liquid flows along the bottom surface of water conservancy diversion apron 3 and annular protruding muscle 32, and the water conservancy diversion effect is better, and certain degree blocks that liquid directly strikes axle sleeve 21. The upper surface of the bottom plate 33 of the deflector cover plate 3 is an inclined plane gradually descending from inside to outside.

Preferably, the lower surface of the blade of the impeller 2 is formed with a bent portion 22, and a rib 23 is provided on the outer side of the bent portion 22, and the rib 23 is provided in the circumferential direction, thereby enhancing the strength of the lower portion of the impeller 2.

In one embodiment, the sleeve 21 is a rubber sleeve 21 made of nitrile rubber, fluororubber or other wear-resistant rubber.

In one embodiment, as shown in fig. 3, the sleeve 21 is formed by bonding a fluororubber layer 210, a glass fiber layer 211 and a nitrile rubber layer 212 to each other from inside to outside. Wherein, fluororubber is used for the inlayer material of axle sleeve 21 to have high temperature resistant, strong corrosion resistance, the advantage of super cleanliness factor, and butadiene acrylonitrile rubber mainly adopts low temperature emulsion polymerization production, and the oil resistance is fabulous, and the wearability is higher, and the heat resistance is better, and the adhesion is strong for axle sleeve 21's outer layer structure has the wearability, improves axle sleeve 21's life, and glass fiber layer 211 can strengthen axle sleeve 21's intensity.

The utility model discloses an application principle does:

as shown in fig. 1 and fig. 2, the rotation of the impeller shaft 1 drives the shaft shank 20 and the impeller 2 to rotate, the shaft sleeve 21 on the shaft shank 20 collides with the stainless steel insert 31 of the deflector plate 3, and due to the arrangement of the shaft sleeve 21, the shaft shank 20 is protected, the abrasion of the shaft shank 20 is prevented, and the strength of the shaft shank 20 is not affected.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the impeller shaft 1, the impeller 2, the shaft shank 20, the shaft sleeve 21, the fluororubber layer 210, the glass fiber layer 211, the nitrile rubber layer 212, the bent portion 22, the ribs 23, the flow guide cover plate 3, the arc-shaped convex portion 30, the stainless steel insert 31, the annular convex rib 32, the bottom plate 33, the volute 4, and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention and should not be interpreted as imposing any additional limitations that are contrary to the spirit of the present invention.

Claims (10)

1. The utility model provides an impeller shaft handle abrasionproof decreases structure for deep-well pump, includes impeller shaft (1), a plurality of series connection and is in impeller (2) and every on impeller shaft (1) set up water conservancy diversion apron (3), its characterized in that on impeller (2): the impeller (2) is sleeved with the impeller shaft (1) through the shaft handles (20), each shaft handle (20) comprises an upper extending section (200) located on the upper portion of the impeller (2) and a lower extending section (201) located on the lower portion of the impeller (2), the upper extending section (200) is in a step shape, the diameter of the upper portion of the upper extending section is smaller than that of the lower portion of the upper extending section, the portion, with the smaller diameter, of the step shape of the shaft handle (20) is in transition fit with a shaft sleeve (21), a stainless steel insert (31) is sleeved on the inner side of the flow guide cover plate (3), and the stainless steel insert (31) is in clearance fit with the shaft sleeve (21).

2. The impeller arbor wear prevention structure for a deep-well pump of claim 1, wherein: the inner side of the flow guide cover plate (3) is provided with an inward arc-shaped convex part (30), and the stainless steel insert (31) is an arc-shaped insert matched with the arc-shaped convex part (30).

3. The impeller arbor wear prevention structure for a deep-well pump of claim 1, wherein: the shaft sleeve (21) is a rubber shaft sleeve.

4. The impeller arbor wear prevention structure for a deep-well pump of claim 3, wherein: the diameter of the outer side wall of the shaft sleeve (21) is gradually increased from top to bottom.

5. The impeller arbor wear prevention structure for a deep-well pump of claim 4, wherein: the minimum outer diameter of the rubber shaft sleeve (21) is larger than the outer diameter of the lower extension section (201) of the shaft handle (20).

6. The impeller arbor wear prevention structure for a deep-well pump of claim 1, wherein: the shaft sleeve (21) is formed by mutually combining a fluororubber layer (210), a glass fiber layer (211) and a butadiene-acrylonitrile rubber layer (212) from inside to outside.

7. The impeller arbor wear prevention structure for a deep-well pump of claim 2, wherein: the guide cover plate (3) is provided with an annular convex rib (32) extending upwards near the arc-shaped convex part (30), the top end of the annular convex rib (32) is higher than the top end of a shaft handle (20) matched with the guide cover plate (3), and an arc-shaped transition is formed between the inner side surface of the annular convex rib (32) and a bottom plate (33) of the guide cover plate (3).

8. The impeller arbor wear prevention structure for a deep-well pump of claim 7, wherein: the upper surface of the bottom plate (33) of the flow guide cover plate (3) is an inclined plane gradually descending from inside to outside.

9. The impeller arbor wear prevention structure for a deep-well pump of claim 1, wherein: the impeller is characterized by further comprising a volute (4), wherein the volute (4) is sleeved on the outer side of the lower extension section (201) of the shaft handle (20), and the volute (4) and the flow guide cover plate (3) enclose the impeller in the middle cavity.

10. The impeller arbor wear prevention structure for a deep-well pump of claim 1, wherein: a bent part (22) is formed in the lower surface of each blade of the impeller (2), and ribs (23) are arranged on the outer side of the bent part (22).

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