CN114323438A - Impeller static balancing device - Google Patents
Impeller static balancing device Download PDFInfo
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- CN114323438A CN114323438A CN202111460597.4A CN202111460597A CN114323438A CN 114323438 A CN114323438 A CN 114323438A CN 202111460597 A CN202111460597 A CN 202111460597A CN 114323438 A CN114323438 A CN 114323438A
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- impeller
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- balance
- pressure sensor
- balancing device
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Abstract
The invention discloses an impeller static balance device which comprises concentric rings, wherein a balance disc is sleeved on the outer sides of the concentric rings, the balance disc is formed by connecting an inner annular disc frame and a plurality of supports which are circumferentially distributed on the outer sides of the annular disc frame, included angles between the adjacent supports are the same, a pressure sensor is arranged in each support, a jack and a cushion block with equal height are arranged between the adjacent supports, each support is a rectangular support, and a scale mark which takes the circle center of the balance disc as a starting point is arranged on the edge of each support. The impeller static balance device is assembled by the concentric rings, the balance disc, the pressure sensor and the jack, the structure is simple, the position of the pressure sensor can be adjusted according to the diameter of the excircle of the impeller to be measured, the measurement radius of the unbalanced moment can be adjusted, the universality is good, the operation is safe and convenient, and the precision is reliable.
Description
Technical Field
The invention belongs to the technical field of electromechanical integrated detection devices, and relates to an impeller static balancing device.
Background
For a large rotor part such as a dredge pump impeller, the working speed is generally 250-350 rpm, the maximum diameter is close to 3 meters, the maximum weight is more than 10 tons, a main inertia shaft at the mass center of the impeller is not coincident with a rotation axis due to casting errors, uneven material structures, shape errors (particularly non-processing parts) of the part, asymmetrical local shapes and the like, unbalanced centrifugal force is generated during rotation, if the unbalanced centrifugal force is too large, the pump shaft, the bearing box and a pump body mounting base vibrate, the safe operation of the integral dredge pump is greatly influenced, and therefore static balance detection and correction are required to be performed when the impeller leaves a factory.
The traditional static balancing process of rotor parts mainly adopts a 'steel ball type' static balancing method, and the method has the biggest defects of low precision, poor repeatability and high requirements on surface hardness, smoothness and the like of a balancing ball and a mirror plate. And for large parts, because the steel ball and the mirror plate belong to a point contact mode, the dead weight of the overweight part causes the deformation of the bearing steel ball and the mirror plate, and the unbalance measurement and the balancing are directly influenced. The current more advanced static balance method is a stress rod balance method, but the method has high requirements on the material of the stress rod, each stress rod has to be independently tested for the elastic modulus, the processing period is long, the requirements on the arrangement position of a transformer are very strict, the tooling cost is high, the assembly is inconvenient, and the use is complicated.
The common static balancing process for the impeller of the dredge pump usually adopts a horizontal rotating shaft type, namely a dummy shaft which is concentric with the shaft end of the impeller and has the same diameter as the shaft end of the impeller is arranged at the suction end of the impeller, the impeller is erected and then placed on a bearing frame to rotate, the unbalanced part is positioned at the lowest point of the impeller after the impeller is static under the action of gravity, then a heavy object is added at the opposite position to balance the unbalanced weight until the stopping position of the impeller randomly appears, and the mass of the added heavy object is the unbalanced weight of the impeller at the moment. This method has the following problems: 1) the error is large under the influence of factors such as the flexible degree of rotation of the bearing frame, the friction force between the false shaft of the impeller and the bearing and the like; 2) when in operation, the impeller needs to be turned over, erected and lifted, is easy to topple and has poor safety; 3) the distance between the left bearing frame and the right bearing frame needs to be adjusted according to different impeller heights, and when the impeller is placed on the bearing frames, certain impact is inevitably generated on the bearings, and the bearing frames are damaged in the past; 4) a false shaft with the same diameter needs to be manufactured for each impeller with different shaft end diameters, so that the cost is high, and time and labor are wasted.
Disclosure of Invention
The invention aims to provide an impeller static balancing device, which solves the problems of larger measurement error and lower safety of the existing impeller static balancing device of a dredge pump.
The impeller static balancing device comprises a concentric ring, a balancing disc is sleeved on the outer side of the concentric ring and is formed by connecting an inner annular disc frame and a plurality of supports which are circumferentially distributed on the outer side of the concentric ring, included angles between every two adjacent supports are the same, a pressure sensor is arranged in each support, and a jack is arranged between every two adjacent supports.
The support is a rectangular support, and scale marks taking the circle center of the balance disc as a starting point are arranged on the edge of the support.
The concentric ring is provided with an axial threaded hole, and a mounting bolt is arranged in the threaded hole.
And equal-height cushion blocks are arranged between the adjacent brackets.
The bottom of the pressure sensor is provided with a supporting base.
Three supports are circumferentially distributed outside the balance disc.
The impeller static balancing device has the advantages that the impeller static balancing device is assembled by the concentric rings, the balancing disc, the pressure sensor and the jack, the structure is simple, the position of the pressure sensor can be adjusted according to the diameter of the excircle of the impeller to be measured, the measurement radius of the unbalanced moment can be adjusted, the universality is good, the operation is safe and convenient, and the precision is reliable.
Drawings
FIG. 1 is a schematic structural diagram of an impeller static balancing device of the present invention;
FIG. 2 is a partial sectional view of the static balancing apparatus of the impeller according to the present invention in use;
fig. 3 is a distribution diagram of the positions of three pressure sensors in the static balancing device of the impeller.
In the figure, 1 concentric ring, 2 balance disc, 3 pressure sensor, 4 jack, 5 mounting bolt, 6 equal height cushion block, 7 supporting base, 8 impeller to be measured, 21 annular disc frame, 22 bracket.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to an impeller static balance device, which comprises a concentric ring 1, wherein a balance disc 2 is sleeved outside the concentric ring 1, the balance disc 2 is formed by connecting an inner annular disc frame 21 and three outer circumferentially distributed supports 22, included angles between the adjacent supports 22 are the same, a pressure sensor 3 is arranged inside each support 22, a support base 7 is arranged at the bottom of each pressure sensor 3, and a jack 4 and an equal-height cushion block 6 are arranged between the adjacent supports 22.
The support 22 is a rectangular support, and the edge of the support is provided with scale marks taking the circle center of the balance disc 2 as a starting point, so that the position of the pressure sensor 3 in the support 22 can be accurately adjusted.
The concentric ring 1 is provided with an axial threaded hole, and a mounting bolt 5 is arranged in the threaded hole and used for fixedly connecting the concentric ring 1 with the mud pump impeller.
When the impeller static balance device is used, the operation steps are as follows:
(1) referring to fig. 2, firstly, the impeller static balance device is placed on a platform, then the shaft end of the impeller 8 to be measured is placed upwards on the top of the weighing type static balance device, and the impeller 8 to be measured is enabled to bear on the equal-height cushion block 6;
(2) fixing the concentric ring 1 and the impeller 8 to be tested together by using a mounting bolt 5, so that the circle center of the impeller 8 to be tested is superposed with the circle center of the balance disc and is close to the outer circle of the lower end surface of the impeller to be tested;
(3) lifting the jacks 4 to enable the impeller 8 to be tested to bear the weight of the three jacks 4, then synchronously descending the three jacks to enable the impeller to be tested to bear the weight of the three groups of pressure sensors, and checking the horizontal error of the impeller to be tested;
(4) lifting a jack, jacking an impeller to be tested, and enabling three groups of pressure sensors to return to zero;
(5) the jack is synchronously descended again to ensure that the impeller to be measured bears the weight of the three groups of pressure sensors, and the data G on the 3 groups of pressure sensors is readA1、GB1、GC1；
(6) Repeating the steps (4) and (5) for two times, and respectively recording 2 groups of data GA2、GB2、GC2And GA3、GB3、GC3；
(7) Repeating the steps (4), (5) and (6) for three times after rotating the impeller to be tested by 180 degrees, and recording to obtain three groups of data G'A1、G’B1、G’C1，G’A2、G’B2、G’C2And G'A3、G’B3、G’C3；
(8) As shown in FIG. 3, when 3 pressure sensors are loaded, three sets of data G are readA、GB、GCAfter decomposing 3 readings to X, Y axes, the method can be obtained
GX＝GA-(GB sin 30°+GC sin 30°) (1)
GY＝GC cos 30°-GB cos 30° (2)
The total weight G of the impeller can be obtained according to the formulas (1) and (2)General assemblyAnd angle θ:
θ＝arctan(GX/GY) (4)
(9) respectively averaging the results of the previous three measurements and three groups of data measured after the impeller to be measured rotates by 180 degrees, and then averaging again to obtain the unbalance and the angle of the impeller at the distribution circle of the pressure sensor;
(10) according to the determined unbalance angle orientation of the impeller to be measured, removing the weight G at the proper non-processing surface position of the impellerFruit of Chinese wolfberryAccording to the moment balance principle, the method is calculated according to the following formula:
wherein R isMeasuringDistribution of the radius of the circle, R, for the pressure sensorFruit of Chinese wolfberryRadius of actual de-weight of impeller to be measured, GMeasuringIs the weight bias measured at the pressure sensor.
(11) After the weight is removed, the impeller is subjected to static balance measurement until the weight deviation is reduced to an allowable range.
Claims (6)
1. Impeller static balance device, its characterized in that is including concentric ring (1), and concentric ring (1) outside cover is equipped with balance disk (2), and balance disk (2) are connected by inside annular plate rail (21) and a plurality of supports (22) that outside circumference distributes and are constituteed, and the contained angle between adjacent support (22) is the same, and support (22) inside is provided with pressure sensor (3), is provided with jack (4) between adjacent support (22).
2. The impeller static balancing device according to claim 1, characterized in that the support (22) is a rectangular support, and the edge of the support (22) is provided with a graduation mark taking the center of the balancing disk (2) as a starting point.
3. The impeller static balancing device according to claim 1, characterized in that the concentric rings (1) are provided with axially threaded holes in which mounting bolts (5) are arranged.
4. The impeller static balancing device according to claim 1, characterized in that between adjacent brackets (22) there is provided a spacer block (6) of equal height.
5. The impeller static balancing device according to claim 1, characterized in that the pressure sensor (3) is provided at its bottom with a support base (7).
6. The impeller static balancing device according to claim 1, characterized in that three brackets (22) are circumferentially distributed on the outside of the balancing disk (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111460597.4A CN114323438A (en) | 2021-12-01 | 2021-12-01 | Impeller static balancing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111460597.4A CN114323438A (en) | 2021-12-01 | 2021-12-01 | Impeller static balancing device |
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| Publication Number | Publication Date |
|---|---|
| CN114323438A true CN114323438A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111460597.4A Pending CN114323438A (en) | 2021-12-01 | 2021-12-01 | Impeller static balancing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615615A (en) * | 2022-11-21 | 2023-01-17 | 武汉地震计量检定与测量工程研究院有限公司 | Device and method for measuring axial centroid position of lens |
-
2021
- 2021-12-01 CN CN202111460597.4A patent/CN114323438A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615615A (en) * | 2022-11-21 | 2023-01-17 | 武汉地震计量检定与测量工程研究院有限公司 | Device and method for measuring axial centroid position of lens |
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