CN211288215U

CN211288215U - Petrochemical industry process impeller location structure

Info

Publication number: CN211288215U
Application number: CN201922390409.XU
Authority: CN
Inventors: 张翠
Original assignee: Tianjin Runfa Casting Co ltd
Current assignee: Tianjin Runfa Casting Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-18
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a petrochemical process impeller location structure, include. The utility model discloses in, a petrochemical process impeller location structure, including the pump shaft, the front end surface contact of pump shaft has the impeller, one side fixedly connected with axle sleeve of impeller, first conical hole groove has been seted up to the middle part of axle sleeve, the front end of pump shaft and the middle part with the axle sleeve homonymy has seted up the conical hole groove of second, the circular cone round pin has been placed in first conical hole groove and the conical hole inslot of second, the both sides of axle sleeve are passed respectively to the both ends of circular cone round pin to extend to one side, the front end surface of pump shaft just is located one side of axle sleeve and has seted up first keyway, the second keyway has been seted up to inside wall one side of the outer surface contact of impeller and pump shaft, the key has been placed in first keyway and the second keyway, the both ends of first keyway, second keyway and key flush with the both sides of impeller respectively. The utility model discloses can prevent the clearance activity to convenient the dismantlement.

Description

Petrochemical industry process impeller location structure

Technical Field

The utility model relates to a location structure field especially relates to a petrochemical process impeller location structure.

Background

The assembly structure of petrochemical industry process pump and thick liquids pump comprises the pump body, impeller nut, impeller, pump cover, and is sealed, pump shaft, bearing box and accessory part etc.. The inner hole of the impeller and the pump shaft are arranged and positioned on the pump shaft in a radial matching mode, the impeller is positioned by the axial direction depending on the shoulder surface of the shaft, and the impeller is fastened by an impeller nut. At present, a petrochemical process pump adopts cylindrical pins for matching and positioning between an impeller and a pump shaft. Because the part of the pump where the impeller is matched with the shaft is immersed in the medium in the pump cavity, the matched part is corroded by the medium, micro-particles in the medium can also enter the matched clearance surface, and particularly, the slurry pump contains solid particles or fibers, so that the impeller is difficult to disassemble when the pump needs to be maintained; in the operation process of the pump, micro-motion friction is generated between the impeller and the pump shaft due to the influence of vibration, the phenomenon of adhesion and occlusion is easily generated on softer materials, the disassembly is difficult, and even the large block of the matching surface is roughened and damaged when the disassembly is performed. The shoulder surface used for the axial positioning of the impeller has larger stress concentration due to the influence of the size and diameter transition of the pump shaft and the tool withdrawal groove in the pump shaft, so that the effective bearing load of the pump shaft is reduced, and the shaft breakage accident is easily caused. When clearance fit is adopted, the matching surface may be contacted on one side during assembly, and the dynamic balance of the actual pump rotor is increased, so that the vibration of the pump is increased, and the reliable operation of the pump is influenced; and the interference fit is adopted, so that the difficulty in disassembly during maintenance is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a petrochemical process impeller positioning structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a petrochemical industry flow impeller location structure, includes the pump shaft, the front end surface contact of pump shaft has the impeller, one side fixedly connected with axle sleeve of impeller, first conical hole groove has been seted up to the middle part of axle sleeve, the front end of pump shaft and the middle part with the axle sleeve homonymy has seted up the conical hole groove of second, the taper pin has been placed in first conical hole groove and the conical hole inslot of second, the both ends of taper pin pass the both sides of axle sleeve respectively to extend to one side, the front end surface of pump shaft just is located one side of axle sleeve and has seted up first keyway, the second keyway has been seted up to inside wall one side of the surface contact of impeller and pump shaft, the key has been placed in first keyway and the second keyway, the both ends of first keyway, second keyway and key flush with the both sides of impeller respectively.

As a further description of the above technical solution:

the shaft sleeve and the impeller are integrally formed.

As a further description of the above technical solution:

the first key groove and the second key groove are matched for use, and the size of the first key groove and the size of the second key groove are equal to the size of the key.

As a further description of the above technical solution:

the material of the key adopts 45 steel.

As a further description of the above technical solution:

the size of the first conical hole groove and the size of the second conical hole groove are equal to the size of the taper pin.

As a further description of the above technical solution:

the material of the taper pin is 45 steel, and the taper pin has a thickness of 1: a taper of 50 deg.

The utility model discloses following beneficial effect has:

the utility model discloses a structural component such as first keyway, second keyway, key, first conical hole groove, second conical hole groove and taper pin has been set up for X axle direction and Y axle direction are all died by the lock between impeller and the pump shaft, avoid vibrating because of clearance activity production, and convenient the dismantlement.

Drawings

Fig. 1 is a side view of a petrochemical process impeller positioning structure provided by the present invention;

FIG. 2 is a front view of a petrochemical process impeller positioning structure provided by the present invention;

fig. 3 is an enlarged view at a.

Illustration of the drawings:

1. a pump shaft; 2. an impeller; 3. a taper pin; 4. a shaft sleeve; 5. a second conical bore groove; 6. a key; 7. a first keyway; 8. a second keyway; 9. a first conical bore recess.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of 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; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides an embodiment: a petrochemical engineering process impeller positioning structure comprises a pump shaft 1, an impeller 2 is contacted with the outer surface of the front end of the pump shaft 1, one side of the impeller 2 is fixedly connected with a shaft sleeve 4, the shaft sleeve 4 can be fixed to move in the X-axis direction through a cone pin 3 and the pump shaft 1, so that the impeller is prevented from generating displacement along the direction of the pump shaft 1, a first cone-shaped hole groove 9 is formed in the middle of the shaft sleeve 4 and is matched with a second cone-shaped hole groove 5 for use, the cone pin 3 is placed in the first cone-shaped hole groove 9 and the second cone-shaped hole groove 5, the impeller is prevented from generating displacement along the direction of the pump shaft 1 through the movement of the shaft sleeve 4 fixed with the pump shaft 1 in the X-axis direction, two ends of the cone pin 3 respectively penetrate through two sides of the shaft sleeve 4, and extend to one side, conveniently take out taper pin 3, the dismantlement of the impeller 2 of being convenient for, first keyway 7 has been seted up to the front end surface of pump shaft 1 and the one side that is located axle sleeve 4, use with the cooperation of second keyway 8, be used for placing key 6, second keyway 8 has been seted up to inside wall one side of the outer surface contact of impeller 2 and pump shaft 1, use with the cooperation of first keyway 7, be used for placing key 6, key 6 has been placed in first keyway 7 and the second keyway 8, die through blocking with pump shaft 1 and impeller 2 simultaneously, the motion of fixed Y axle direction, can prevent the rotation of impeller 2 relative pump shaft 1, first keyway 7, the both ends of second keyway 8 and key 6 flush with the both sides of impeller 2 respectively, make things convenient for laying and taking out of key 6, the dismantlement of the impeller 2 of being convenient for.

The sleeve 4 and the impeller 2 are integrally formed, and stability of the component is ensured. First keyway 7 and the cooperation of second keyway 8 use, and the size and size of first keyway 7 and second keyway 8 all equals the size and size of key 6, realizes laying of key 6 to avoid producing the clearance. The material of the key 6 adopts 45 steel, and ensures the extrusion stress and the allowable pressure of the key 6. The size of the first conical hole groove 9 and the second conical hole groove 5 is equal to that of the taper pin 3, so that the taper pin 3 is placed, and gaps are avoided. The material of the taper pin 3 is 45 steel, which ensures the shear stress and the extrusion stress of the taper pin 3, and has a weight ratio of 1: the taper of 50 is caused by the transverse force applied to the taper pin 3, so that self-locking can be generated, and the pump shaft 1 is prevented from falling off due to rotation.

The working principle is as follows: firstly, the key 6 is placed in the first key groove 7, then the second key groove 8 of the impeller 2 is aligned to the key 6, the impeller 2 is sleeved at the front end of the pump shaft 1, the second key groove 8 is completely meshed with the key 6, meanwhile, the first conical hole groove 9 is matched with the second conical hole groove 5, then the bottom end of the conical pin 3 is inserted from one side of the wider part of the first conical hole groove 9, the bottom end of the conical pin penetrates through the shaft sleeve 4 and the pump shaft 1, and then the positioning of the impeller 2 and the pump shaft 1 can be completed.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a petrochemical industry process impeller location structure, includes pump shaft (1), its characterized in that: the impeller is characterized in that an impeller (2) is contacted with the outer surface of the front end of the pump shaft (1), a shaft sleeve (4) is fixedly connected to one side of the impeller (2), a first conical hole groove (9) is formed in the middle of the shaft sleeve (4), a second conical hole groove (5) is formed in the middle of the front end of the pump shaft (1) and on the same side with the shaft sleeve (4), a conical pin (3) is placed in the first conical hole groove (9) and the second conical hole groove (5), two ends of the conical pin (3) penetrate through two sides of the shaft sleeve (4) respectively and extend to one side, a first key groove (7) is formed in the outer surface of the front end of the pump shaft (1) and located on one side of the shaft sleeve (4), a second key groove (8) is formed in one side of the inner side wall, which is contacted with the outer surface of the pump shaft (1), and a key (6) is placed in the first key groove (, the two ends of the first key groove (7), the second key groove (8) and the key (6) are respectively flush with the two sides of the impeller (2).

2. The petrochemical process impeller positioning structure of claim 1, wherein: the shaft sleeve (4) and the impeller (2) are integrally formed.

3. The petrochemical process impeller positioning structure of claim 1, wherein: the first key groove (7) and the second key groove (8) are matched for use, and the size of the first key groove (7) and the size of the second key groove (8) are equal to that of the key (6).

4. The petrochemical process impeller positioning structure of claim 1, wherein: the material of the key (6) adopts 45 steel.

5. The petrochemical process impeller positioning structure of claim 1, wherein: the size of the first conical hole groove (9) and the size of the second conical hole groove (5) are equal to the size of the conical pin (3).

6. The petrochemical process impeller positioning structure of claim 1, wherein: the material of the taper pin (3) adopts 45 steel, and the taper pin has a thickness of 1: a taper of 50 deg.