CN211009255U

CN211009255U - Submersible mixed flow pump capable of adjusting clearance between impeller and pump shell

Info

Publication number: CN211009255U
Application number: CN201921926279.0U
Authority: CN
Inventors: 韩建华; 陈吉红; 徐琴; 陈小燕
Original assignee: Jiangsu Zhongxing Water Service Co ltd
Current assignee: Jiangsu Zhongxing Water Service Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-07-14
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a submersible mixed flow pump capable of adjusting the clearance between an impeller and a pump shell, which comprises a main shaft and a pump shell, wherein the main shaft is connected with the water pump; the main shaft is provided with an impeller which is arranged in an impeller cavity, and the main shaft also comprises an impeller positioning ring; the impeller positioning ring can be adjusted up and down along the main shaft; the impeller positioning ring is connected with the impeller and fixes the impeller on the main shaft; a key is arranged between the main shaft and the impeller. The utility model limits the relative rotation of the impeller along the main shaft by arranging the key between the main shaft and the impeller; the impeller can be fixed on the main shaft by matching with the impeller positioning ring; the position of the impeller on the main shaft can be directly adjusted through the impeller locating ring, so that the gap between the spherical surface of the impeller and the spherical surface in the impeller cavity is adjusted, a certain adjusting range is reserved between the impeller and the gap between the pump shell, and the adjusting effect is good. The submerged mixed flow pump solves the defects in the prior art and can adjust the gap between the impeller and the pump shell by adjusting the position of the impeller on the main shaft.

Description

Submersible mixed flow pump capable of adjusting clearance between impeller and pump shell

Technical Field

The utility model relates to a dive mixed flow pump field, concretely relates to dive mixed flow pump in adjustable impeller and pump case clearance.

Background

The existing submersible mixed flow pump has the phenomena of slightly low efficiency and falling off of an impeller. The reason is as follows: the size of the clearance between the impeller and the pump shell is related to the design control size on one hand and the machining precision and assembly on the other hand. The gap between the impeller and the pump shell (connected with the water inlet horn into a whole) of the submersible mixed-flow pump is too large, so that the leakage is serious, and the efficiency of the water pump is reduced; and the impeller with the original structure is easy to fall off. Since mixed pumps generally have a higher head, i.e. a higher pressure, than axial pumps, leakage is more severe. The problem that the clearance is guaranteed only by means of machining precision is solved, but machining has a certain tolerance range and accumulated errors, and therefore the clearance is properly adjusted through an assembly relation.

As in application No.: 200520047757.2, the name is: the patent application of "an open impeller gap adjustable device" has already pointed out that: the clearance between the blade and the base is very important and is controlled within a certain range, the blade is worn very fast in use, the time is long, the clearance is overlarge, the function of the pump cannot be fully exerted, but the clearance between the open impeller and the base of the existing submersible sewage pump cannot be adjusted conveniently.

In this application, the gap between the base, which corresponds to the front shroud of the impeller, and the impeller is changed by adjusting the screwing depth of the screw thread of the circumferential bolt. Thus, the position of the actual impeller on the main shaft is unchanged. Therefore, this application does not fundamentally address the issue of clearance between the blade and the base.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: the utility model aims at solving the deficiencies in the prior art and providing a submersible mixed flow pump with impeller and pump case clearance adjusted by adjusting the position of the impeller on the main shaft.

The technical scheme of the utility model: the utility model relates to a submersible mixed flow pump capable of adjusting the clearance between an impeller and a pump shell, which comprises a main shaft and a pump shell, wherein the main shaft is connected with the water pump; the main shaft is provided with an impeller which is arranged in the impeller cavity, and the main shaft further comprises an impeller positioning ring; the impeller positioning ring can be adjusted up and down along the main shaft; the impeller positioning ring is connected with the impeller and fixes the impeller on the main shaft; a key is arranged between the main shaft and the impeller.

Furthermore, the impeller positioning ring comprises an impeller bolt hole and a connecting section in threaded connection with the lower end of the main shaft; and the screw penetrates through the impeller bolt hole to fix the impeller positioning ring and the impeller together.

The fastening ring is arranged behind the impeller positioning ring, namely the main shaft is sequentially provided with an impeller, an impeller positioning ring and the fastening ring; the fastening ring is in threaded connection with the lower end of the main shaft.

Further, the lower section of the main shaft is provided with an external thread; the connection section and the fastening ring are provided with internal threads matched with the external threads.

Further, the lower end of the impeller is provided with a water guide cone;

further, the blades are detachably connected to the impeller.

The utility model has the advantages of compared with the prior art:

1. a key is arranged between the main shaft and the impeller to limit the relative rotation of the impeller along the main shaft; the impeller can be fixed on the main shaft by matching with the impeller positioning ring; the position of the impeller on the main shaft can be directly adjusted through the impeller locating ring, the operation is simple, a certain adjusting range is arranged between the impeller and the gap of the pump shell, and the adjusting effect is good.

2. The fastening ring is arranged and is locked on the main shaft after the impeller positioning ring is locked and the impeller is fixed on the impeller by the inner hexagon screw; the utility model discloses a two locking structure make the impeller locking on the main shaft, all play the effect that the impeller is locking not hard up, anti-drop when no matter the water pump is just reversing.

3. The lower section of the main shaft is provided with an external thread; the connection section and the fastening ring are provided with internal threads matched with the external threads, and the connecting device is simple in structure, good in stability and easy to process and maintain.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the impeller structure of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A in FIG. 2;

fig. 4 is a schematic structural view of the impeller retainer ring of the present invention;

fig. 5 is a schematic structural view of the pump casing of the present invention.

Wherein, B in fig. 1 is the gap between the impeller and the pump casing.

Detailed Description

In order to deepen the understanding of the present invention, we will make further details of the present invention with reference to the drawings, and this embodiment is only used to explain the present invention, and does not constitute a limitation to the protection scope of the present invention.

Fig. 1-5 show an embodiment of the submersible mixed flow pump with adjustable clearance between the impeller and the pump casing of the present invention, which connects the main shaft 2 of the water pump and the pump casing 5, the pump casing 5 includes an impeller cavity 51, and the caliber of the inner wall 510 of the impeller cavity 51 decreases progressively from top to bottom; the main shaft 2 is provided with an impeller 1, the impeller 1 is arranged in an impeller cavity 51, the impeller positioning ring 3 also comprises an impeller bolt hole 31 and a connecting section 32 in threaded connection with the lower end of the main shaft 2; the screw passes through the impeller bolt hole 31 to fix the impeller retainer 3 and the impeller 1 together. As shown in fig. 3, the impeller body 10 of the impeller 1 is provided with a key groove 12 matching with the key 21, a threaded hole 13 corresponding to the impeller bolt hole 31, and a through hole 11 for the spindle 2 to pass through; the lower section of the main shaft 2 is provided with an external thread; the engagement section 32 and the fastening ring 4 are provided with internal threads matching the external threads. The fastening ring 4 is arranged behind the impeller positioning ring 3, namely the impeller 1, the impeller positioning ring 3 and the fastening ring 4 are sequentially arranged on the main shaft 2; the fastening ring 4 is in threaded connection with the lower end of the main shaft 2. The impeller positioning ring 3 is connected with the impeller 1 and fixes the impeller 1 on the main shaft 2; a key 21 is arranged between the main shaft 2 and the impeller 1.

Wherein, the lower end of the impeller 1 is provided with a water guide cone 14. The vanes 15 are detachably attached to the impeller 1.

The utility model discloses a concrete application method does: the tail end of the water pump main shaft 2 is provided with an external thread, and an inner hole of the impeller positioning ring 3 is provided with a matched internal thread; firstly, assembling the flat key 21 at the key groove of the main shaft 2, pushing the key groove 12 of the impeller 1 into the position aligned with the key 21, assembling the flat key at a proper position on the main shaft, measuring the gap B between the blade 15 of the impeller 1 and the inner wall 510 (the spherical surface of the water inlet horn) of the impeller cavity 51 by using a feeler gauge, and adjusting the position of the impeller 1 on the main shaft 2 until the gap B between the blade 15 and the inner wall 510 is proper. The impeller locating ring 3 is locked, corresponding parts for fixing the impeller 1 are used, and then the fastening ring 4 is locked on the water pump main shaft 2. A double-nut locking structure is adopted, so that the impeller 1 is locked on the main shaft 2 of the water pump, and the functions of looseness prevention and falling prevention are achieved no matter the water pump rotates positively and negatively.

The utility model has the characteristics that the clearance between the impeller and the pump shell can be adjusted by adjusting the position of the impeller on the main shaft, and a key 21 is arranged between the main shaft 2 and the impeller 1 to limit the relative rotation of the impeller 1 along the main shaft 2; the impeller 1 can be fixed on the main shaft 2 by matching with the impeller locating ring 3; the position of the impeller 1 on the main shaft 2 can be directly adjusted through the impeller locating ring 3, the operation is simple, a certain adjusting range is formed between the impeller and a pump shell gap, and the adjusting effect is good; and secondly, a fastening ring 4 is arranged, and after the impeller positioning ring 3 is locked and the impeller positioning ring 3 is fixed on the impeller 1 by using a socket head cap screw, the fastening ring 4 is locked on the main shaft. The impeller 1 is locked on the main shaft 2 by adopting a double-locking structure, and plays roles of preventing the impeller from loosening and falling off no matter the water pump rotates positively and negatively; secondly, the lower section of the main shaft 2 is provided with an external thread; linking up section 32 and tighrening ring 4 and being equipped with the internal thread that matches the external screw thread, simple structure, stability is good, easily processing and maintenance.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration only, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. A submersible mixed flow pump capable of adjusting the clearance between an impeller and a pump shell comprises a main shaft (2) connected with the pump and the pump shell (5), wherein the pump shell (5) comprises an impeller cavity (51), and the caliber of the inner wall (510) of the impeller cavity (51) is gradually reduced from top to bottom; be equipped with impeller (1) on main shaft (2), impeller (1) sets up in impeller cavity (51), its characterized in that: the impeller positioning ring (3) can be adjusted up and down along the main shaft (2); the impeller locating ring (3) is connected with the impeller (1) and fixes the impeller (1) on the main shaft (2); a key (21) is arranged between the main shaft (2) and the impeller (1).

2. The submersible mixed flow pump capable of adjusting the clearance between the impeller and the pump shell as claimed in claim 1, wherein: the impeller positioning ring (3) comprises an impeller bolt hole (31) and a connecting section (32) in threaded connection with the lower end of the main shaft (2); and the screw penetrates through the impeller bolt hole (31) to fix the impeller positioning ring (3) and the impeller (1) together.

3. The submersible mixed flow pump capable of adjusting the clearance between the impeller and the pump shell as claimed in claim 2, wherein: the impeller positioning ring is characterized by further comprising a fastening ring (4), wherein the fastening ring (4) is arranged behind the impeller positioning ring (3), namely the main shaft (2) is sequentially provided with an impeller (1), the impeller positioning ring (3) and the fastening ring (4); the fastening ring (4) is in threaded connection with the lower end of the main shaft (2).

4. The submersible mixed flow pump capable of adjusting the clearance between the impeller and the pump shell as claimed in claim 3, wherein: the lower section of the main shaft (2) is provided with an external thread; the connecting section (32) and the fastening ring (4) are provided with internal threads matched with the external threads.

5. The submersible mixed flow pump capable of adjusting the clearance between the impeller and the pump shell as claimed in claim 1, wherein: the lower end of the impeller (1) is provided with a water guide cone (14).

6. The submersible mixed flow pump capable of adjusting the clearance between the impeller and the pump shell as claimed in claim 1, wherein: the blades (15) are detachably connected to the impeller (1).