CN112729680B

CN112729680B - Multifunctional core rod for dynamic balance of impeller

Info

Publication number: CN112729680B
Application number: CN202011496248.3A
Authority: CN
Inventors: 林上红; 林慧超; 陈书
Original assignee: Zhejiang Handsome Intelligent Remanufacturing Technology Co ltd
Current assignee: Zhejiang Handsome Intelligent Remanufacturing Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2023-03-28
Anticipated expiration: 2040-12-17
Also published as: CN112729680A

Abstract

The invention discloses a multifunctional mandrel for dynamic balance of an impeller, which comprises a mandrel body, wherein an installation section is arranged in the middle of the outer wall of the mandrel body, the outer walls of two ends of the mandrel body are respectively provided with a first clamping part and a second clamping part, the inner wall of the installation section is provided with five groups of first clamping grooves, and the inner sides of the five groups of first clamping grooves are respectively provided with a first threaded hole.

Description

Multifunctional core rod for dynamic balance of impeller

Technical Field

The invention relates to the technical field of impellers, in particular to a multifunctional core rod for dynamic balance of an impeller.

Background

The high-speed rotating machinery is greatly influenced by materials, and the rotor system of the machine is unbalanced and has faults caused by impact, corrosion, abrasion, coking and the like. While a vibration failure of the rotating machine results from an unbalance of the rotor system for 70%. In order to ensure the stable and normal operation of the equipment, the parts of the rotor system are subjected to dynamic balance correction before delivery so as to reduce the original unbalance amount of the rotor system, and the impeller is a key component in the rotor system and is composed of a plurality of vertical or curved blades. From a water pump in a common farmland to a shield pump, a multistage pump and a circulating water pump in petrochemical industry and then to a high-speed centrifugal pump on a steam turbine and an aerospace engine. The impeller is widely applied to various fields of agriculture, petrochemical industry, aerospace, navigation and the like. The main function of the device is to convert the mechanical energy of the prime mover into direct energy to be transmitted to liquid and gas so as to increase the dynamic and static pressure energy of the liquid and the gas.

The impeller plays a main role in various devices, so most impellers need to be subjected to dynamic balance correction to reduce the original unbalance amount and ensure the normal operation of the devices. Because of the structural characteristics of the impeller, the impeller can not be directly placed on a dynamic balancing machine like a rotating shaft, dynamic balance correction can be carried out only by customizing a core rod matched with an inner hole of the impeller and fixing the core rod which is corrected through dynamic balance, and the most common method at present is to customize an inner hole core rod of the impeller with a corresponding specification through a special matching mode, namely according to the inner diameter of the impeller which is actually required, so that the corresponding core rod of the impeller needs to be customized again every time a new impeller comes, not only is the core rod material wasted, but also unnecessary repetitive work is carried out, and the dynamic balance correction period of the impeller is prolonged.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a multifunctional core rod for dynamic balance of an impeller.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an impeller is multi-functional plug for dynamic balance, includes the plug body, plug body outer wall position placed in the middle is provided with the installation section, plug body both ends outer wall is provided with first centre gripping position, second centre gripping position respectively, the installation section inner wall is provided with the first draw-in groove of five groups, five groups first draw-in groove inboard all is provided with first screw hole, plug body outer wall is provided with centre gripping width adjusting device, prevents scurrying the device, the inside joint of first draw-in groove has support aperture adjusting device.

As a further description of the above technical solution:

the clamping width adjusting device comprises a first thread section and a second thread section, the first thread section is arranged between the mounting section and the first clamping position, and the second thread section is arranged between the mounting section and the second clamping position.

As a further description of the above technical solution:

the anti-shifting device comprises a first locking nut and a second locking nut, the first locking nut is in threaded connection with the outer wall of the first threaded section, the second locking nut is in threaded connection with the outer wall of the second threaded section, a first notch is formed in the outer wall of the first locking nut, and a second notch is formed in the outer wall of the second locking nut.

As a further description of the above technical solution:

the support aperture adjusting device comprises five groups of standard tiles, the five groups of standard tiles are respectively clamped inside the first clamping grooves of the five groups of standard tiles, bosses are arranged on the lower surfaces of the five groups of standard tiles, and the five groups of standard tiles are respectively clamped with the first clamping grooves of the five groups of standard tiles through the bosses.

As a further description of the above technical solution:

and the upper surface of the five groups of standard tile blocks is provided with a second clamping groove, the inner wall of the five groups of standard tile blocks is provided with a second threaded hole, and the second threaded holes are respectively in threaded connection with the five groups of first threaded holes through five groups of jackscrews.

As a further description of the above technical solution:

five groups of the standard tile blocks are manufactured into multiple groups by taking five millimeters in a metric thickness system as a first grade, five groups of the standard tile blocks are manufactured into multiple groups by taking one quarter inch in a British thickness system as a first grade, and the second clamping grooves are matched with the bosses in size.

The invention has the following beneficial effects:

compared with the prior art, this multi-functional plug is used in impeller dynamic balance, through setting up longer first screw thread section and second screw thread section, can adjust centre gripping width scope according to the width of impeller, through the first lock nut that sets up, second lock nut, and at first lock nut, first breach and the second breach of seting up on the second lock nut, cooperation check washer uses, can make the impeller can not the drunkenness in the dynamic balance test, through the multiunit standard tile piece that sets up, can adjust the use quantity of standard tile piece according to the internal diameter of impeller, thereby realize that a plug body can deal with the function of not unidimensional impeller.

Drawings

Fig. 1 is a schematic view of an overall structure of a multifunctional core rod for dynamic balancing of an impeller according to the present invention;

fig. 2 is a schematic structural view of a core rod body of the multifunctional core rod for dynamic balance of the impeller provided by the invention;

FIG. 3 is a schematic front structural view of a standard shoe of a multifunctional core rod for dynamic balancing of an impeller according to the present invention;

fig. 4 is a schematic back structure view of a standard pad of the multifunctional core rod for dynamic balancing of the impeller according to the present invention.

Illustration of the drawings:

1. a mandrel body; 2. a first clamping portion; 3. a second clamping portion; 4. a first thread segment; 5. a second thread segment; 6. an installation section; 7. a first card slot; 8. a first threaded hole; 9. a first lock nut; 10. a second lock nut; 11. a first notch; 12. a second notch; 13. standard tiles; 14. a second card slot; 15. carrying out top thread; 16. a second threaded hole; 17. and (4) a boss.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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", etc. 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 particular orientation, be constructed and operated in a particular 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, the present invention provides a multifunctional core rod for dynamic balancing of an impeller: including plug body 1, the central position of 1 outer wall of plug body is provided with installation section 6, and the outer wall of 1 both ends of plug body is provided with first clamping part 2, second clamping part 3 respectively, and 6 inner walls of installation section are provided with the first draw-in groove 7 of five groups, and the first draw-in groove 7 inboards of five groups all are provided with first screw hole 8, and 1 outer wall of plug body is provided with centre gripping width adjusting device, prevents scurrying the device, and the inside joint of first draw-in groove 7 has support aperture adjusting device.

The clamping width adjusting device comprises a first thread section 4 and a second thread section 5, wherein the first thread section 4 is arranged between the installation section 6 and the first clamping part 2, the second thread section 5 is arranged between the installation section 6 and the second clamping part 3, and the first thread section 4 and the second thread section 5 are longer in length and can be suitable for impellers with different widths to be tested.

The anti-shifting device comprises a first locking nut 9 and a second locking nut 10, the first locking nut 9 is in threaded connection with the outer wall of the first thread section 4, the second locking nut 10 is in threaded connection with the outer wall of the second thread section 5, a first notch 11 is formed in the outer wall of the first locking nut 9, a second notch 12 is formed in the outer wall of the second locking nut 10, the impeller can be compressed through common locking gaskets matched with the first locking nut 9 and the second locking nut 10, and the anti-shifting device is ensured not to shift in a test.

The support aperture adjusting device comprises five groups of standard tiles 13, the five groups of standard tiles 13 are respectively clamped inside the five groups of first clamping grooves 7, bosses 17 are arranged on the lower surfaces of the five groups of standard tiles 13, and the five groups of standard tiles 13 are respectively clamped with the five groups of first clamping grooves 7 through the bosses 17.

Five standard tile piece 13 upper surfaces are provided with second draw-in groove 14, and five standard tile piece 13 inner walls of organizing are provided with second screw hole 16, and five second screw holes 16 of organizing are respectively through five jackscrews 15 and the first screw hole 8 threaded connection of five groups, and this setting can let standard tile piece 13 tear the installation open fast.

Five sets of standard tiles 13 are made into a plurality of sets with thickness metric system and five millimeters, five sets of standard tiles 13 are made into a plurality of sets with thickness imperial system according to quarter inch, the second clamping groove 14 is matched with the boss 17 in size, and the plurality of sets of standard tiles 13 can be adapted according to different sizes of the inner diameter hole of the impeller.

The working principle is as follows: measuring the bore diameter of the impeller, selecting a proper combination of standard tiles 13, installing the standard tiles 13 in five groups of first clamping grooves 7 of the mandrel body 1 respectively, fixing the standard tiles by using a lengthened jackscrew 15, installing a first locking nut 9 on the outer wall of a first thread section 4 on the mandrel body 1, installing the impeller on the outer wall of the mandrel body 1, attaching the front end face of the impeller to the first locking nut 9, attaching the inner diameter of the impeller to the outer diameter of the standard tiles 13, installing a second locking nut 10 on the outer wall of a second thread section 5 on the mandrel body 1, locking the first locking nut 9 and the second locking nut 10 together by using two wrenches, placing the mandrel body 1 and the impeller on a dynamic balancing machine together through a first clamping part 2 and a second clamping part 3, performing dynamic balance correction, and disassembling according to the reverse order after the correction is finished.

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 may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an impeller is multi-functional plug for dynamic balance, includes plug body (1), its characterized in that:

an installation section (6) is arranged in the middle of the outer wall of the mandrel body (1), the outer walls of two ends of the mandrel body (1) are respectively provided with a first clamping part (2) and a second clamping part (3), the inner wall of the installation section (6) is provided with five groups of first clamping grooves (7), the inner sides of the five groups of first clamping grooves (7) are respectively provided with a first threaded hole (8), the outer wall of the mandrel body (1) is provided with a clamping width adjusting device and a channeling prevention device, and a supporting aperture adjusting device is clamped in the first clamping grooves (7);

the support aperture adjusting device comprises five groups of standard tiles (13), the five groups of standard tiles (13) are respectively clamped in the five groups of first clamping grooves (7), bosses (17) are arranged on the lower surfaces of the five groups of standard tiles (13), and the five groups of standard tiles (13) are respectively clamped with the five groups of first clamping grooves (7) through the bosses (17);

the clamping width adjusting device comprises a first thread section (4) and a second thread section (5), the first thread section (4) is arranged between the mounting section (6) and the first clamping part (2), and the second thread section (5) is arranged between the mounting section (6) and the second clamping part (3);

the anti-shifting device comprises a first locking nut (9) and a second locking nut (10), the first locking nut (9) is in threaded connection with the outer wall of the first threaded section (4), the second locking nut (10) is in threaded connection with the outer wall of the second threaded section (5), a first notch (11) is formed in the outer wall of the first locking nut (9), and a second notch (12) is formed in the outer wall of the second locking nut (10);

the upper surfaces of the five groups of standard tile blocks (13) are provided with second clamping grooves (14), the inner walls of the five groups of standard tile blocks (13) are provided with second threaded holes (16), and the five groups of second threaded holes (16) are in threaded connection with the five groups of first threaded holes (8) through five groups of jackscrews (15) respectively;

five groups of standard tile blocks (13) are made into a plurality of groups by taking the thickness metric system of five millimeters as a first grade, five groups of standard tile blocks (13) are made into a plurality of groups by taking the thickness imperial system of one quarter inch as a first grade, and the second clamping groove (14) is matched with the boss (17) in size.