CN115127730A - Rotor dynamic balance weight-removing angle position measuring instrument and measuring method - Google Patents
Rotor dynamic balance weight-removing angle position measuring instrument and measuring method Download PDFInfo
- Publication number
- CN115127730A CN115127730A CN202210819879.7A CN202210819879A CN115127730A CN 115127730 A CN115127730 A CN 115127730A CN 202210819879 A CN202210819879 A CN 202210819879A CN 115127730 A CN115127730 A CN 115127730A
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- rotor
- pointer
- angular position
- rotating rod
- measuring instrument
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating unbalance
- G01M1/34—Compensating unbalance by removing material from the body to be tested, e.g. from the tread of tyres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
Abstract
The invention relates to an angular position measuring instrument and a measuring method for rotor dynamic balance and weight removal, the angular position measuring instrument for rotor dynamic balance and weight removal comprises a base, a dial fixedly connected to the base, a rotor tray fixedly arranged on the dial, a rotating rod rotatably arranged between the base and the dial, a pointer slide rod vertically connected to the rotating rod and a pointer which is parallel to the rotating rod and vertically connected to the pointer slide rod, the rotor dynamic balance weight-removing angular position measuring instrument can accurately indicate the angular positions corresponding to the unbalance state parameters in the weight-removing areas at the two ends of the rotor according to the rotor unbalance state parameters measured by the dynamic balancing instrument, has the advantages of simple structure, good operability, high accuracy and the like, and can achieve the purpose of measuring the rotor dynamic balance weight-removing angular positions of the small-sized turboexpander.
Description
Technical Field
The invention relates to the technical field of rotor unbalance mass position measurement, in particular to an angle position measuring instrument and a measuring method for rotor dynamic balance weight removal of a small-sized turbo expander.
Background
The gas bearing is a sliding bearing using gas as a lubricant, has a series of advantages of low friction power consumption, high motion precision, small vibration, cleanness, no pollution, high and low temperature resistance, stable work in special environment and the like, and is widely researched and applied in the aspects of high-speed turboexpanders, precision machine tool machining, precision instruments, nuclear engineering and the like. For a small turboexpander to be capable of high-speed stable operation, a bearing rotor system with good performance plays an important role. In the static pressure gas bearing, the smaller the unbalanced mass of the rotor, the smaller the centrifugal force in a high speed state, and the less unstable.
That is, a rotor-bearing system with good stability is an important guarantee for ensuring the high-speed and stable operation of the small turboexpander. The unbalanced mass of the rotor is one of the important factors causing the stability of the static pressure gas bearing, the center of mass of the rotor is not on the geometric center due to the factors such as uneven material density distribution, machining and the like, when the rotor rotates around the geometric center at a high speed, centrifugal force is generated, and when the centrifugal force is larger than the gas film force provided by the bearing, instability is caused. Therefore, a rotor with good rotor dynamic characteristics needs to be developed, and the high-speed stable operation of the rotor in the bearing can be ensured.
The rotor structure of the small low-temperature turbo expander is in a stepped cylindrical state, and the specific physical position of unbalance is determined according to the unbalance state parameters of the rotor measured by the dynamic balancer, so that the angle value specified by the dynamic balancer needs to be accurately found in the de-weighting areas at the two ends of the rotor. However, no device is currently available that meets the above requirements.
Disclosure of Invention
The present invention provides an angular position measuring instrument and a measuring method for rotor dynamic balance weight removal, wherein the angular position measuring instrument for rotor dynamic balance weight removal can accurately indicate the angular position corresponding to the unbalance state parameter in the weight removal area at the two ends of the rotor according to the unbalance state parameter measured by the dynamic balancer, has the advantages of simple structure, good operability and high accuracy, and can achieve the purpose of measuring the rotor dynamic balance weight removal angular position of the small-sized turboexpander.
The invention provides an angular position measuring instrument for dynamic balance and weight removal of a rotor, which comprises a base, a dial fixedly connected to the base, a rotor tray fixedly arranged on the dial, a rotating rod rotatably arranged between the base and the dial, a pointer slide rod vertically connected to the rotating rod and a pointer parallel to the rotating rod and vertically connected to the pointer slide rod, wherein the rotor tray is used for placing the rotor of a small turbine expander, and a manual calibration reference line of the rotor is aligned with a zero scale line of the dial; the rotating rod is used for driving the pointer sliding rod and the pointer to move according to the angle rotation measured by the dynamic balancing instrument, and the pointer is used for indicating the angle position of the rotor for dynamic balancing and weight removal.
In an embodiment of the present invention, a cylindrical structure is formed at a central position of the rotor tray and extends downward to be fixedly connected with the base, so that a rotating space for the rotating rod to rotate is formed between the rotor tray and the base as well as between the dial and the base, and the rotating rod is connected with the cylindrical structure through a bearing, so as to form a state that the rotating rod is rotatably disposed on the base.
In an embodiment of the invention, the rotor tray is provided with a limiting hole for placing the rotor, and the coaxiality of 10-20 microns is maintained among the limiting hole, the dial, the rotating rod and the base.
In an embodiment of the present invention, perpendicularity of 10 to 20 micrometers is maintained among the pointer, the pointer sliding rod and the rotating rod.
In one embodiment of the invention, the scale is a 360 ° scale, the minimum scale is 5 °, and the maximum scale is 10 °.
In an embodiment of the present invention, the pointer is slidably and vertically connected to the pointer sliding rod, so as to measure the angular position of the dynamic balance weight removal on the upper side and the lower side of the rotor.
In an embodiment of the present invention, the rotating rod and the pointer sliding rod are fixedly connected through a first fixing element, and the pointer sliding rod and the pointer are fixedly connected through a second fixing element.
The invention also provides a measuring method of the rotor dynamic balance weight-removing angular position measuring instrument in another aspect, which comprises the following steps:
s1, placing the rotor in a limiting hole of a rotor tray, and aligning the manual calibration reference line of the rotor with the zero scale line of the dial;
s2, the pointer is moved to the lower half part of the rotor de-weighting area in a sliding mode, and the position of the pointer is fixed through a second fixing piece;
and S3, rotating the rotating rod according to the angle measured by the dynamic balancing instrument to drive the pointer sliding rod and the pointer to rotate, wherein the position indicated by the pointer is the dynamic balancing and weight removing angular position of the rotor.
In an embodiment of the present invention, before the step S1, the method further includes a step of assembling the rotor dynamic balance and weight removal angular position measuring apparatus:
fixedly assembling the dial and the rotor tray to form a combined body;
the combination body is fixedly connected with the base through the columnar structure of the rotor tray;
the rotating rod is connected with the columnar structure through a bearing;
the pointer sliding rod is fixedly connected with the rotating rod through a first fixing piece;
and the pointer is connected with the pointer sliding rod through a second fixing piece.
The invention designs an angle position measuring instrument for rotor dynamic balance weight removal of a small-sized turbo expander, which can find the target angle position of the unbalanced mass on a rotor by using a calibrated zero angle as a reference according to the angle of the unbalanced mass calculated by a dynamic balancer, so that the rotor can be quickly and accurately removed in weight, the mass center of the rotor is close to the geometric center, and the rotor with good dynamic characteristics is provided.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
Drawings
Fig. 1 is a schematic cross-sectional view of an angular position measuring instrument for dynamic balancing and weight removal of a rotor according to a preferred embodiment of the present invention.
Fig. 2 is a schematic top view of the rotor dynamic balancing and weight removing angular position measuring instrument shown in fig. 1.
The reference numbers illustrate: a base 1; a rotating rod 2; a first fixing member 3; a pointer slide bar 4; a second fixing member 5; a pointer 6; a dial 7; a rotor tray 8; a stopper hole 81; and a rotor 9.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "vertical," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above terms should not be construed as limiting the present invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in figures 1 and 2, the invention provides an instrument for accurately measuring the position angle of an unbalanced mass in a dynamic balance and weight removal process of a gas bearing rotor. The invention particularly provides an angular position measuring instrument and a measuring method for rotor dynamic balance weight removal.
Specifically, the rotor dynamic balance and weight removal angular position measuring instrument comprises a base 1, a dial 7 fixedly connected to the base 1, a rotor tray 8 fixedly arranged on the dial 7, a rotating rod 2 rotatably arranged between the base 1 and the dial 7, a pointer slide rod 4 vertically connected to the rotating rod 2, and a pointer 6 parallel to the rotating rod 2 and vertically connected to the pointer slide rod 4, wherein the rotor tray 8 is used for placing a rotor 9 of a small turbine expander, and an artificial calibration datum line of the rotor 9 is aligned with a zero scale line of the dial 7; the rotating rod 2 is used for driving the pointer sliding rod 4 and the pointer 6 to move according to the angle rotation measured by the dynamic balancing instrument, and the pointer 6 is used for indicating the angle position of the rotor 9 for dynamic balancing and weight removal.
The rotor dynamic balance weight-removing angular position measuring instrument can determine the specific physical position of the unbalance according to the rotor unbalance state parameter measured by the dynamic balancer to indicate the accurate angular position for rotor weight removal, so that the rotor weight removal is convenient to quickly and accurately remove, the mass center of the rotor is close to the geometric center, the rotor with good dynamic characteristics is obtained, and the rotor can stably run in a bearing at a high speed.
Further, the central position of rotor tray 8 extends downwards and is formed with the column structure that is used for with base 1 fixed connection, calibrated scale 7 with rotor tray 8 fixed connection forms the combination, and this combination passes through the column structure with base 1 is connected to be in unsettled state between this combination and the base 1, promptly the column structure makes rotor tray 8 with calibrated scale 7 with be formed with between the base 1 and supply rotary rod 2 pivoted rotation space, rotary rod 2 pass through the bearing with the column structure is connected, so as to form rotary rod 2 rotationally set up in the state of base 1. The rotary rod 2 is rotatable through 360 °.
It is worth mentioning that the scale 7 is a 360 ° scale 7, the minimum scale is 5 °, and the maximum scale is 10 °. In some embodiments of the present invention, the minimum scale and the maximum scale of the scale disk 7 may be other numerical values, which is not limited by the present invention.
Further, rotor tray 8 is provided with and is used for placing the spacing hole 81 of rotor, spacing hole 81 dial 7 rotary rod 2 and keep 10 ~ 20 microns of axiality between the base 1 to this keeps high axiality and can guarantees the measuring accuracy, also can conveniently process simultaneously.
Furthermore, perpendicularity of 10-20 micrometers is kept among the pointer 6, the pointer sliding rod 4 and the rotating rod 2, so that the measuring accuracy is guaranteed, and meanwhile, the processing is convenient.
In particular, the cursor 6 is slidably and vertically connected to the cursor slide 4 so as to measure the angular position of the dynamic balancing and weight removal of the upper and lower sides of the rotor.
It can be understood that the rotor dynamic balance weight-removing angular position measuring instrument of the present invention is based on a base 1, and the rotating rod 2 is linked with the base 1 through a radial bearing and can rotate freely; the pointer sliding rod 4 and the rotating rod 2 are fixedly connected through a first fixing piece 3; the pointer 6 is slidably arranged on the pointer sliding rod 4 and is fixed at a position opposite to the pointer sliding rod 4 through a second fixing piece 5; the dial 7 and the rotor tray 8 form a combined body, and are fixedly connected with the base 1 through the nonstandard threads of the columnar structure; the rotor 9 is mounted on the rotor tray 8 through a limiting hole 81 in the middle of the rotor tray 8.
It is worth mentioning that the first fixing member 3 and the second fixing member 5 are fastening nuts.
The measuring process of the rotor dynamic balance weight-removing angular position measuring instrument is as follows:
firstly, assembling all parts of the rotor dynamic balance and weight removal angular position measuring instrument according to requirements;
secondly, the rotor 9 is placed in a limiting hole of the rotor tray 8, and a reference line manually calibrated by the rotor 9 is aligned to a zero scale mark on the dial 7;
then, sliding the pointer 6 up and down to a weight removing area, and screwing the second fixing piece 5;
finally, rotating the rotating rod 2 according to the angle measured by the dynamic balancing instrument, so that the angle on the pointer sliding rod 4 is the position indicated by the pointer 6, namely the position of the unbalanced mass.
That is, the present invention also provides in another aspect a measuring method of the rotor dynamic balance de-weighting angular position measuring apparatus, including the steps of:
s1, placing the rotor 9 in a limiting hole of the rotor tray 8, and aligning the manual calibration reference line of the rotor 9 with the zero scale mark of the dial 7;
s2, sliding the pointer 6 to a rotor weight reduction area, and fixing the position of the pointer 6 by the second fixing member 5;
and S3, rotating the rotating rod 2 according to the angle measured by the dynamic balancer to drive the pointer sliding rod 4 and the pointer 6 to rotate, wherein the position indicated by the pointer 6 is the dynamic balance weight-removing angular position of the rotor.
It should be noted that, in step S2, the position indicated by the pointer 6 is adjusted according to whether the rotor deduplication zone to be measured is the upper half or the lower half, that is, in step S2, the pointer 6 may be slidingly moved to the upper half or the lower half of the rotor deduplication zone, which is not limited by the present invention.
Further, before the step S1, the method for measuring an angular position measuring instrument for rotor dynamic balance and weight removal further includes a step of assembling the angular position measuring instrument for rotor dynamic balance and weight removal:
fixedly assembling the dial 7 and the rotor tray 8 to form a combined body;
the combination body is fixedly connected with the base 1 through the columnar structure of the rotor tray 8;
the rotating rod 2 is connected with the columnar structure through a bearing;
the pointer sliding rod 4 and the rotating rod 2 are fixedly connected through the first fixing piece 3;
the pointer 6 and the pointer slide bar 4 are connected through the second fixing piece 5.
In summary, the present invention provides an angular position measuring instrument and a measuring method for rotor dynamic balance weight removal, which can accurately indicate the angular position corresponding to the unbalance state parameter in the weight removal areas at the two ends of the rotor according to the rotor unbalance state parameter measured by the dynamic balancer, wherein the angular position measuring instrument for rotor dynamic balance weight removal has the advantages of simple structure, good operability, high accuracy, and the like, and can achieve the purpose of measuring the angular position for rotor dynamic balance weight removal of the small-sized turboexpander.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. An angular position measuring instrument for dynamic balance and weight removal of a rotor is characterized by comprising a base, a dial fixedly connected to the base, a rotor tray fixedly arranged on the dial, a rotating rod rotatably arranged between the base and the dial, a pointer slide rod vertically connected to the rotating rod and a pointer which is parallel to the rotating rod and vertically connected to the pointer slide rod, wherein the rotor tray is used for placing the rotor of a small turbine expander, and a manual calibration reference line of the rotor is aligned with a zero scale line of the dial; the rotating rod is used for driving the pointer sliding rod and the pointer to move according to the angle rotation measured by the dynamic balancing instrument, and the pointer is used for indicating the angle position of the rotor for dynamic balancing and weight removal.
2. The rotor dynamic balance weight-removing angular position measuring instrument according to claim 1, wherein a cylindrical structure is formed at a central position of the rotor tray in a downward extending manner for fixedly connecting with the base, so that a rotating space for the rotating rod to rotate is formed between the rotor tray, the dial and the base, and the rotating rod is connected with the cylindrical structure through a bearing, so that the rotating rod is rotatably disposed on the base.
3. The rotor dynamic balance weight-removing angular position measuring instrument according to claim 1, wherein the rotor tray is provided with a position-limiting hole for placing the rotor, and the position-limiting hole, the dial, the rotating rod and the base maintain 10-20 μm of coaxiality therebetween.
4. The rotor dynamic balance weight-removing angular position measuring instrument according to claim 1, wherein perpendicularity of 10-20 μm is maintained among the pointer, the pointer slide bar and the rotating bar.
5. Rotor dynamic balancing and weight removing angular position measuring instrument according to any of the claims 1 to 4, characterized in that the scale is a 360 ° scale, the minimum scale is 5 ° and the maximum scale is 10 °.
6. The rotor dynamic balance weight-removing angular position measuring instrument according to any one of claims 1 to 4, wherein the pointer is slidably and vertically connected to the pointer slide bar so as to measure the angular position of the dynamic balance weight-removing on the upper and lower sides of the rotor.
7. The rotor dynamic balance weight-removing angular position measuring instrument according to any one of claims 1 to 4, wherein the rotating rod and the pointer sliding rod are fixedly connected through a first fixing member, and the pointer sliding rod and the pointer are fixedly connected through a second fixing member.
8. A method for measuring an angular position measuring instrument with dynamic rotor balancing and weight removal according to any one of claims 1 to 7, comprising the steps of:
s1, placing the rotor in a limiting hole of a rotor tray, and aligning the manual calibration reference line of the rotor with the zero scale line of the dial;
s2, the pointer is moved to the rotor de-weighting area in a sliding mode, and the position of the pointer is fixed through a second fixing piece;
and S3, rotating the rotating rod according to the angle measured by the dynamic balancing instrument to drive the pointer sliding rod and the pointer to rotate, wherein the position indicated by the pointer is the dynamic balancing and weight removing angular position of the rotor.
9. The method for measuring the rotor dynamic balance weight-removed angular position measuring instrument according to claim 8, further comprising the step of assembling the rotor dynamic balance weight-removed angular position measuring instrument before the step S1:
fixedly assembling the dial and the rotor tray to form a combined body;
the combination body is fixedly connected with the base through the columnar structure of the rotor tray;
the rotating rod is connected with the columnar structure through a bearing;
the pointer sliding rod is fixedly connected with the rotating rod through a first fixing piece;
and the pointer is connected with the pointer sliding rod through a second fixing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210819879.7A CN115127730A (en) | 2022-07-13 | 2022-07-13 | Rotor dynamic balance weight-removing angle position measuring instrument and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210819879.7A CN115127730A (en) | 2022-07-13 | 2022-07-13 | Rotor dynamic balance weight-removing angle position measuring instrument and measuring method |
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| Publication Number | Publication Date |
|---|---|
| CN115127730A true CN115127730A (en) | 2022-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210819879.7A Pending CN115127730A (en) | 2022-07-13 | 2022-07-13 | Rotor dynamic balance weight-removing angle position measuring instrument and measuring method |
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| CN (1) | CN115127730A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026275A (en) * | 2023-02-27 | 2023-04-28 | 鱼台感创精密机械有限公司 | Accurate detection device of axial float error of rotor |
-
2022
- 2022-07-13 CN CN202210819879.7A patent/CN115127730A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026275A (en) * | 2023-02-27 | 2023-04-28 | 鱼台感创精密机械有限公司 | Accurate detection device of axial float error of rotor |
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