CN220288986U - Blower balance - Google Patents

Abstract

The disclosure relates to the technical field of fan testing equipment, and provides a fan balance, which comprises a balance body; the balance body is cylindrical as a whole, and connecting parts for connecting the fan and the mounting frame are respectively arranged at two ends of the balance body; the outer peripheral wall of the balance body is also provided with an attaching part for attaching the strain gauge; the attaching parts are uniformly spaced and annularly arranged along the peripheral wall of the balance body. The fan balance can directly perform bending and torsion resistance performance test through the cylindrical balance body so as to measure actual bending moment, torque, load and other information in the working process of the fan, avoid the problem that an irregular cylindrical section in a main shaft of the fan has deviation influence on a measuring result, and have the beneficial effect of accurate test data.

Description

Blower balance

Technical Field

The disclosure relates to the technical field of fan test equipment, in particular to a fan balance.

Background

At present, in the wind driven generator testing process, the method is generally used for testing the bending and torsion resistance of a main shaft of the wind driven generator. The torque of the main shaft of the fan reflects the load capacity of the fan and is one of key data of a wind turbine generator, accurate measurement is needed, the torque of the main shaft of the fan is mainly measured by sticking a strain gauge at the position of the cambered surface of the main shaft, which is close to a wind wheel brake disc, in front of a main bearing seat, but the position is an irregular cylindrical section, and when the main shaft of the fan rotates for measurement, a bending moment signal is superposed in the torque signal, so that the torque measurement is inaccurate.

Moreover, for testing of high-power, wide-range wind turbines, more test data and more accurate test results are often required to ensure performance and quality.

In view of this, a new wind turbine testing device is needed in the market to solve the problem that the wind turbine testing data in the prior art is easily inaccurate.

Disclosure of Invention

The embodiment of the disclosure provides a fan balance, which aims to solve the technical problem that test data of a wind driven generator in the prior art are easy to be inaccurate.

The fan balance provided by the embodiment of the disclosure comprises a balance body;

the balance body is cylindrical as a whole, and connecting parts for connecting the fan and the mounting frame are respectively arranged at two ends of the balance body;

the outer peripheral wall of the balance body is also provided with an attaching part for attaching the strain gauge;

the attaching parts are uniformly spaced and annularly arranged along the outer peripheral wall of the balance body.

In an embodiment, the connecting part is a connecting edge formed by protruding two ends of the balance body outwards in radial direction respectively;

the connecting edge is also provided with a plurality of threaded holes which are uniformly spaced and annularly arranged in the thickness direction of the connecting edge.

In one embodiment, the connecting edge is further provided with a concentric butt positioning edge on the side facing away from the balance body;

the butt joint positioning edge is positioned on the inner sides of the threaded holes.

In one embodiment, the blower balance further comprises a sealing cover plate;

the sealing cover plate is wound on the outer peripheral wall of the balance body and is arranged corresponding to the attaching part and used for sealing the strain gauges.

In one embodiment, the fan balance further comprises an instrument mounting plate;

the instrument mounting plate is correspondingly arranged on the peripheral wall of the balance body through the mounting hole.

In an embodiment, the fan balance further comprises a mounting hanging ring;

the installation hanging ring is correspondingly installed on the peripheral wall of the balance body through an installation hole site.

In an embodiment, the meter mounting plate and the mounting hanging ring are respectively and oppositely arranged at two sides of the balance body along the same radial direction of the balance body.

In one embodiment, the balance body can be internally provided with an internal slip ring;

the peripheral wall of the balance body is also provided with a slip ring through hole for installing and connecting the internal slip ring.

In one embodiment, the balance body is integrally forged from CrMo material.

In one embodiment, the balance body is hardened by quenching, tempering, and sub-tempering.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

when the fan balance provided by the embodiment of the disclosure is used, the fan can be connected and fixed with the balance body through the connecting part at the upper end of the balance body, the balance body is connected and fixed with the mounting frame through the connecting part at the lower end of the balance body, and then the strain gauge is correspondingly attached to the attaching part of the peripheral wall of the balance body, so that when the fan is subjected to bending torsion resistance test, the balance body can rotate along with the main shaft of the fan at the same time, the strain gauge is attached to the attaching part, so that the working bending moment, working torque, working load and other information to be detected, which the fan is subjected to, can be correspondingly detected in real time according to the stress deformation amplitude of the self, and the whole cylindrical balance body can ensure that bending moment signals, torque signals, load signals and the like of each strain gauge test cannot be influenced by mutual interference in the test process, so that the accuracy of test results is ensured to the greatest extent, and the beneficial effects of accurate test data are achieved.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings, in which:

in the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

FIG. 1 illustrates a self-contained perspective view of a blower balance provided by an embodiment of the present disclosure;

FIG. 2 illustrates a front view of a blower balance provided by an embodiment of the present disclosure;

fig. 3 illustrates a lateral cross-sectional view of a blower balance provided by an embodiment of the present disclosure.

The reference numerals in the figures illustrate: 1. a balance body; 11. a connection part; 111. a threaded hole; 112. a butt joint positioning edge; 12. a sticking part; 13. a slip ring through hole; 2. sealing the cover plate; 3. an instrument mounting plate; 4. and installing a hanging ring.

Detailed Description

In order to make the objects, features and advantages of the present disclosure more comprehensible, the technical solutions in the embodiments of the present disclosure will be clearly described in conjunction with the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person skilled in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

As shown in conjunction with fig. 1 and 2, embodiments of the present disclosure provide a blower balance comprising a balance body 1; the balance body 1 is cylindrical as a whole, and two ends of the balance body are respectively provided with a connecting part 11 for connecting with a fan and a mounting frame; the outer peripheral wall of the balance body 1 is also provided with an attaching part 12 for attaching strain gauges; wherein, the attaching parts 12 are uniformly spaced and annularly arranged along the peripheral wall of the balance body 1.

When the fan balance is specifically used, firstly, the fan can be specifically connected and fixed with the balance body 1 through the connecting part 11 at the upper end of the balance body 1, then the balance body 1 is connected and fixed with the mounting frame through the connecting part 11 at the lower end, and then the strain gauge is correspondingly attached to the attaching part 12 of the peripheral wall of the balance body 1, so that when the fan is subjected to bending torsion resistance test, the balance body 1 can simultaneously rotate along with the main shaft of the fan, the strain gauge is attached to the attaching part 12, the working bending moment, working torque, working load and other information to be detected, which the fan is subjected to, can be correspondingly detected in real time according to the stress deformation amplitude of the fan, and the whole cylindrical balance body 1 can ensure that bending moment signals, torque signals, load signals and the like of each strain gauge test cannot be mutually interfered to the greatest extent in the test process, and the accuracy of test results is ensured.

Compared with the mode of directly carrying out bending torque measurement to the fan main shaft among the prior art, the fan balance that this disclosed embodiment provided can be with the fan fixed mounting that awaits measuring in the mounting bracket when carrying out bending torque resistance test to the fan, and can rotate along with the main shaft of fan simultaneously, through the portion 12 of establishing that pastes with the foil gage setting in cylindric balance body 1, can directly measure the information such as actual moment of flexure, moment of torsion and load in the fan course of working through the mode to the 1 anti bending torque capability test of balance, avoid the problem that irregular cylinder section leads to the fact the deviation influence to the measuring result in the fan main shaft, have the accurate beneficial effect of test data.

In an embodiment, the connecting part 11 is a connecting edge formed by respectively protruding the two ends of the balance body 1 outwards along the radial direction; the connecting edge is also provided with a plurality of threaded holes 111 which are uniformly spaced and annularly arranged in the thickness direction of the connecting edge.

Specifically, as described in further detail with reference to fig. 2 and 3, the height of the specific protrusion of the connecting edge in the radial direction may be set to 1.5 to 2 times the thickness of the wall of the balance body 1, and the thickness of the connecting edge itself may be set to 1.3 to 2 times the thickness of the wall of the balance body 1.

The connecting parts 11 are specifically arranged to be located at two ends of the balance body 1 and are formed by protruding outwards in the radial direction, so that the connecting parts 11 at two ends of the balance body 1 form a connecting structure similar to two flange discs, a plurality of evenly-spaced threaded holes 111 are formed in the connecting edges in the thickness direction of the connecting edges, the threaded holes 111 are formed in a surrounding mode, and therefore the two connecting edges at two ends of the balance body 1 can be respectively in butt joint with a fan and a mounting frame correspondingly and are spirally inserted into the threaded holes 111 through bolts and are screwed and fixed in a connecting mode.

The specific setting mode of the connecting part 11 has the beneficial effects of simple structure, firm connection realization through bolt and spiro union, and convenient disassembly after the test is completed.

In an embodiment, the side of the connecting edge facing away from the balance body 1 is also provided with a concentric docking positioning edge 112; the abutment locating rim 112 is located inside the plurality of threaded bores 111.

Specifically, as described in further detail with reference to fig. 1 and 2, the specific caliber of the butt-joint positioning edge 112 may be set to be slightly smaller than the caliber of the connecting edge by 10 mm-20 mm, and the butt-joint positioning edge 112 is concentrically disposed on the side of the connecting edge opposite to the balance body 1, so that when the fan is connected and fixed with the connecting portion 11 at one end of the balance body 1 through the main shaft, the fan can be pre-inserted into the inner diameter of the main shaft of the fan through the butt-joint positioning edge 112, so as to realize pre-installation and fixation of the fan and the connecting edge, thereby being convenient for aligning the connecting edge with the main shaft of the fan and facilitating subsequent screw threaded hole 111 threaded in the connecting edge.

Of course, in fig. 1, only the butt joint positioning edge 112 is disposed at one side of one end of the balance body 1, which is in butt joint with the main shaft of the fan, or the butt joint positioning edge 112 is disposed at one side of one end of the balance body 1, which is in butt joint with the mounting frame, so that the function of pre-mounting and fixing can be realized when the balance body 1 is in butt joint with the mounting frame.

Moreover, the above-mentioned butt-joint positioning edge 112 may be integrally connected with the connecting edge, and both may be injection molded simultaneously by an integral injection molding process, or the butt-joint positioning edge 112 may be machined by turning the connecting edge facing away from the balance body 1.

The specific arrangement mode of the butt joint positioning edge 112 has the beneficial effects of simple structure and capability of being pre-installed and fixed when the balance body 1 is connected and fixed with a fan or a mounting rack.

In an embodiment, the fan balance further comprises a sealing cover plate 2; the sealing cover plate 2 is wound on the peripheral wall of the balance body 1 and is arranged corresponding to the attaching part 12, and is used for sealing and closing each strain gauge.

Specifically, as described in further detail with reference to fig. 1 and 2, the sealing cover plate 2 may be specifically configured as an arc-shaped plate body, and the radius of the arc may be matched with the cylindrical outer periphery Zhou Bishi of the balance body 1, so that the strain gauge installed in the plurality of attaching portions 12 may be correspondingly covered by only sleeving one sealing cover plate 2 on the cylindrical outer periphery of the balance body 1.

Moreover, the sealing cover plate 2 can be specifically provided with an elastic plate body in a C shape, three quarters of the cylindrical peripheral wall of the balance body 1 can be wrapped during sleeving, and the two ends of the sealing cover plate 2 can be provided with buckle connectors for tightness adjustment connection, so that the sealing cover plate 2 can be conveniently disassembled and assembled.

The specific setting mode of the sealing cover plate 2 has the beneficial effects of being simple in structure, being capable of sealing the sealing cover plate to be matched with the strain gauge and avoiding the influence of external abnormal collision on the test result caused by direct naked installation of the strain gauge.

In one embodiment, the fan balance further comprises an instrument mounting plate 3; the instrument mounting plate 3 is correspondingly arranged on the peripheral wall of the balance body 1 through a mounting hole site.

Specifically, as described in further detail with reference to fig. 1, the meter mounting board 3 may be specifically used for mounting a display meter for each test parameter, where the test parameter can be intuitively displayed by the display meter, and some display meters further have a recording function, so that dynamic changes of each test parameter in the whole testing process of the fan can be recorded.

The instrument mounting plate 3 is correspondingly arranged on the peripheral wall of the balance body 1 through the mounting hole, so that the structural influence of the instrument mounting plate 3 on the balance body 1 can be reduced to the greatest extent, and the consistency of micro deformation of the strain gauge attached to the peripheral wall peripheral attaching part 12 of the balance body 1 is ensured to the greatest extent.

The specific setting mode of the instrument mounting plate 3 has the beneficial effects that the test parameters can be intuitively displayed, the dynamic change of each test parameter in the whole test process of the fan can be recorded, and the influence on the structure of the balance body 1 can be reduced to the greatest extent.

In an embodiment, the fan balance further comprises a mounting hanging ring 4; the mounting hanging ring 4 is correspondingly mounted on the peripheral wall of the balance body 1 through a mounting hole site.

Specifically, in combination with the further detailed description of fig. 1, the installation hanging ring 4 can be specifically used for hanging a hook, so that when the balance body 1 and the installation frame are in butt joint installation or disassembly and separation, the hanging hook in the crane can be directly connected with the installation hanging ring 4 in the balance body 1 in a hanging manner, the hanging hook can not be contacted with other parts of the balance body 1 in the lifting process, and the deformation influence on the cylindrical shell wall of the balance body 1 in the lifting process is avoided.

The specific setting mode of the installation hanging ring 4 has the beneficial effects of simple structure, convenience for transporting the blower balance, and no deformation to the cylindrical shell wall of the balance body 1 in the transporting process.

In one embodiment, the meter mounting plate 3 and the mounting hanging ring 4 are respectively disposed on two sides of the balance body 1 along the same radial direction of the balance body 1.

Specifically, in combination with the further detailed description of fig. 1, the instrument mounting plate 3 and the mounting hanging ring 4 are respectively and oppositely arranged on two sides of the balance body 1 along the same radial direction of the balance body 1, so that two maximum distances can be generated between the instrument mounting plate 3 and the mounting hanging ring 4 along the circumferential direction of the cylindrical shell wall of the balance body 1, the instrument mounting plate 3 can be furthest far away from the mounting hanging ring 4 during lifting and transporting, and the problem that a display instrument is damaged due to accidental collision between a lifting hook in a crane and the instrument mounting plate 3 is avoided.

In one embodiment, the balance body 1 can also be internally provided with an internal slip ring; the peripheral wall of the balance body 1 is also provided with a slip ring through hole 13 for mounting and connecting an internal slip ring.

Specifically, as described in further detail with reference to fig. 2, the slip ring through hole 13 may be, but is not limited to, a circular hole penetrating through the peripheral wall of the balance body 1, and by providing the slip ring through hole 13, a cable for transmitting signals may be connected with an internal slip ring installed inside the balance body 1, so that relevant information collected by the internal slip ring and time-effectively transmitted outwards through the slip ring through hole 13.

In one embodiment, the balance body 1 is integrally forged from 42CrMo material.

42CrMo is an ultra-high strength alloy structural steel, has high strength and toughness, better hardenability, no obvious tempering brittleness, higher fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low-temperature impact toughness. The balance body 1 is integrally forged and formed by 42CrMo materials, so that the integral structure strength of the balance body 1 can be ensured, the balance body 1 made of the 42CrMo materials is tested to realize that the maximum working bending moment Mx/My measuring range reaches 70MNm, the maximum working torque Mz measuring range reaches 20MNm, the maximum working load Fx/Fy/Fz measuring range reaches 8MN, and the maximum load test power of the balance body 1 to a fan is fully improved.

In one embodiment, the balance body 1 is hardened by quenching, tempering, and sub-tempering.

The balance body 1 is subjected to quenching, tempering and sub-temperature quenching strengthening and toughening treatment in sequence, so that the rigidity, hardness, wear resistance, fatigue strength, toughness and other material properties of the balance body 1 can be further improved, the balance body has better mechanical structure characteristics, and the maximum load test power of a fan can be further improved.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (10)

1. A blower balance, characterized by comprising a balance body (1);

the balance body (1) is cylindrical as a whole, and two ends of the balance body are respectively provided with a connecting part (11) for connecting a fan and a mounting frame;

the outer peripheral wall of the balance body (1) is also provided with an attaching part (12) for attaching a strain gauge;

wherein the attaching parts (12) are uniformly spaced and annularly arranged along the peripheral wall of the balance body (1).

2. Fan balance according to claim 1, characterized in that the connecting portion (11) is a connecting edge formed by respectively protruding radially outwards from both ends of the balance body (1);

the connecting edge is also provided with a plurality of threaded holes (111) which are uniformly spaced and annularly arranged in the thickness direction of the connecting edge.

3. Fan balance according to claim 2, characterized in that the side of the connecting edge facing away from the balance body (1) is also provided with a concentric docking locating edge (112);

the butt positioning edge (112) is positioned inside the plurality of threaded holes (111).

4. Fan balance according to claim 1, characterized in that it further comprises a sealing cover plate (2);

the sealing cover plate (2) is wound on the peripheral wall of the balance body (1) and is arranged corresponding to the attaching part (12) for sealing the strain gauges.

5. Fan balance according to claim 1, characterized in that it further comprises an instrument mounting plate (3);

the instrument mounting plate (3) is correspondingly arranged on the peripheral wall of the balance body (1) through a mounting hole site.

6. Fan balance according to claim 5, characterized in that it further comprises a mounting eye (4);

the installation hanging ring (4) is correspondingly installed on the peripheral wall of the balance body (1) through an installation hole site.

7. Fan balance according to claim 6, characterized in that the instrument mounting plate (3) and the mounting suspension ring (4) are arranged on both sides of the balance body (1) opposite to each other in the same radial direction of the balance body (1).

8. Fan balance according to claim 1, characterized in that the inside of the balance body (1) is also provided with an internal slip ring;

the peripheral wall of the balance body (1) is also provided with a slip ring through hole (13) for installing and connecting the internal slip ring.

9. Fan balance according to any one of claims 1 to 8, characterized in that the balance body (1) is integrally forged from 42CrMo material.

10. Fan balance according to claim 9, characterized in that the balance body (1) is hardened by quenching, tempering, sub-tempering.