CN114459673A - Shafting torque measuring device verification platform and method - Google Patents
Shafting torque measuring device verification platform and method Download PDFInfo
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- CN114459673A CN114459673A CN202011242063.XA CN202011242063A CN114459673A CN 114459673 A CN114459673 A CN 114459673A CN 202011242063 A CN202011242063 A CN 202011242063A CN 114459673 A CN114459673 A CN 114459673A
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- 238000012795 verification Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010248 power generation Methods 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 27
- 230000005611 electricity Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000010200 validation analysis Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
- G01L25/003—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring torque
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a platform and a method for verifying a shafting torque measuring device. The platform includes: the system comprises a motor, a generator, a load frequency converter and a monitoring system. The motor is used for outputting power by utilizing electric energy; the generator is in transmission connection with the motor through a shaft system, and a shaft system is provided with a combination part connected with a shaft system torque measuring device; the load frequency converter is connected with the generator and is used for measuring the power generation parameters of the generator; and the monitoring system is connected with the motor, the generator and the load frequency converter and is used for controlling the motor, the generator and the load frequency converter and calculating the actual shafting torque according to the power generation parameters. The shafting torque measuring device verification platform can verify the detection result of the shafting torque measuring device verification platform, further judge whether the shafting torque measuring device meets the requirements and has errors, and verify and check.
Description
Technical Field
The invention relates to the field of ship shafting torque measuring devices, in particular to a shafting torque measuring device verification platform and method
Background
The ship propulsion shafting is an important component of a ship power device. Monitoring the torque of a ship propulsion shafting system is an essential important step for ensuring safe navigation of a ship. The most main problem of the existing device for monitoring the torque of the shafting is that the measurement result of the device cannot be verified. Under the actual use condition on the ship, the real torque value of the ship propulsion shafting cannot be obtained, only the main engine outputs the torque value, and the shafting torque value is obtained by estimating the main engine output torque value. While there is some error between the estimated value and the measured value. This error is either due to the equipment itself or due to the estimated deviation, and cannot be verified.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a shafting torque measurement device verification platform and method for solving at least one of the above problems.
In order to achieve the above object, the present invention provides a shafting torque measuring device verification platform. The platform includes:
an electric motor for outputting power using electric energy;
the generator is in transmission connection with the motor through a shaft system, and a joint part connected with a shaft system torque measuring device is arranged on the shaft system;
the load frequency converter is connected with the generator and used for measuring power generation parameters of the generator; and
and the monitoring system is connected with the motor, the generator and the load frequency converter and used for controlling the motor, the generator and the load frequency converter and calculating the actual shafting torque according to the power generation parameters.
The shafting torque measuring device verification platform can verify the detection result of the shafting torque measuring device verification platform, further judge whether the shafting torque measuring device meets the requirements and has errors, and verify and check.
In an embodiment, the power generation parameters include voltage (U), current (I), frequency (f), and number of pole pairs (P) of the rotating magnetic field of the generator.
In an embodiment, the monitoring system calculates the actual shafting torque according to the power generation parameters and by using a formula (1);
formula (1):
wherein U is a voltage (V); i is current (A); f is frequency (Hz); p is the pole pair number of the rotating magnetic field of the motor.
In an embodiment, the shafting torque measurement device verification platform further comprises:
a motor drive for electrically connecting the motor to a power grid.
In an embodiment, the shafting torque measurement device verification platform further comprises:
a base on which the motor, the generator, and the load converter are disposed.
In an embodiment, the shafting torque measurement device verification platform further comprises:
a protective cover disposed on the platform.
In an embodiment, the load frequency converter is connected to the power grid, and the load frequency converter is configured to return the electricity generated by the generator to the power grid.
The invention also discloses a verification method suitable for the verification platform of the shafting torque measuring device, which is characterized by comprising the following steps:
acquiring power generation parameters of a generator;
calculating an actual value of shafting torque according to the acquired power generation parameters;
acquiring a shafting torque measured value measured by a shafting torque measuring device;
comparing the shafting torque actual value with the shafting torque measured value; if the difference value is smaller than the preset value, the shafting torque measuring device meets the requirement; and if the difference value is larger than the preset value, the shafting torque measuring device does not meet the requirement.
In an embodiment, the power generation parameters include voltage (U), current (I), frequency (f), and the number of pole pairs (P) of the rotating magnetic field of the generator.
In an embodiment, the step of calculating an actual value of shafting torque according to the acquired power generation parameters includes:
calculating the actual shafting torque according to the power generation parameters and by a formula (1);
formula (1):
wherein U is a voltage (V); i is current (A); f is frequency (Hz); p is the pole pair number of the rotating magnetic field of the motor.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a shafting torque measurement device verification platform according to the present invention;
FIG. 2 is a flow chart of a verification method for a shafting torque measurement device verification platform.
Detailed Description
The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and various equivalent modifications of the present invention by those skilled in the art after reading the present invention fall within the scope of the appended claims.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to FIG. 1, an embodiment of the present invention provides a shafting torque measurement device validation platform 10. The platform mainly comprises a motor driver 101, a motor 102, a generator 103, a load frequency converter 104, a monitoring system 105, a special cast iron platform 106 and a safety protection cover 107.
The motor driver 101 is mainly used for taking power from the power grid 50 and driving the motor 102 to rotate. The motor 102 is configured to output power by using electrical energy and drive the test shaft (i.e., a shaft system) and the generator 103 to rotate, where the shaft system is a transmission system formed by a whole set of devices, in the propulsion device, from a main machine output shaft flange to a propeller, and a transmission shaft is mainly used as the transmission shaft therebetween, so that the test shaft can be in transmission connection with the generator 103, and the motor can drive the generator 103 to rotate. The generator 103 mainly functions to generate electricity. The load frequency converter 104 mainly feeds back the electric quantity of the generator 103 to the power grid 50, thereby avoiding waste of electric power. The long shaft and the shaft coupling are used for transmission connection among all parts, the sequence and the number of the long shaft and the shaft coupling are not limited, and the long shaft and the shaft coupling can be selected according to use requirements.
The safety shield 107 is used to shield at least some of the components and thus protect the platform from use. The motor drive 101, motor 102, generator 103, and load inverter 104 components may be disposed on a dedicated cast iron platform 106. The monitoring system 105 is mainly a human operator and measurement calculation.
Specifically, when the shafting torque measurement device 20 is verified, the shafting torque measurement device 20 is installed and fixed on the test shaft (i.e., the shafting), wherein a joint part connected with the shafting torque measurement device 20 is provided on the shafting, and how to install the shafting torque measurement device is known by those skilled in the art, and details are not described herein. The power is supplied by the external power grid 50, the motor 102 is driven to rotate, the test shaft is driven to rotate, the generator 103 is driven to generate power, and the external load is driven. The rotating speed of the motor 102 is constant, the load of the generator 103 is continuously increased, the actual torque is changed, the torque value calculated according to the formula (1) is compared with the torque measured by the torque measuring device, and the calibration and verification of the torque measuring device are realized.
Formula (1):
wherein U is a voltage (V); i is current (A); f is frequency (Hz); p is the pole pair number of the rotating magnetic field of the motor.
The test shaft between the motor 102 and the generator 103 can simulate the intermediate shaft in the ship power system, and the motor 102 can simulate the main engine, the generator 103 and the load to simulate the propeller load. The actual value of the shafting torque can be obtained by measuring the load voltage, the current and the rotating speed of the generator 103. The voltage is measured by a voltage transformer, the current is measured by a current transformer, and the rotating speed is obtained by frequency conversion. Therefore, the torque condition of the marine power system shafting can be simulated, and the measured value of the shafting torque measuring device 20 is verified and checked. Therefore, the shafting torque measurement device verification platform 10 can verify the detection result of the shafting torque measurement device verification platform 10, and further determine whether the shafting torque measurement device 20 meets the requirement and has an error.
The embodiment of the invention also discloses a verification method of the verification platform 10 of the shafting torque measurement device, which is shown in fig. 2 and comprises the following steps:
s101: acquiring power generation parameters of the generator 103;
s102: calculating an actual value of the shafting torque according to the acquired power generation parameters;
s103: acquiring a shafting torque measurement value measured by the shafting torque measurement device 20;
s104: comparing the shafting torque actual value with the shafting torque measured value; if the difference is smaller than the preset value, the shafting torque measuring device 20 meets the requirement; if the difference is greater than the preset value, the shafting torque measuring device 20 is not satisfactory.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.
Claims (10)
1. A shafting torque measurement device verification platform, comprising:
an electric motor for outputting power using electric energy;
the generator is in transmission connection with the motor through a shaft system, and a joint part connected with a shaft system torque measuring device is arranged on the shaft system;
the load frequency converter is connected with the generator and used for measuring power generation parameters of the generator; and
and the monitoring system is connected with the motor, the generator and the load frequency converter and used for controlling the motor, the generator and the load frequency converter and calculating the actual shafting torque according to the power generation parameters.
2. The shafting torque measurement device verification platform according to claim 1, wherein the power generation parameters include voltage U, current I, frequency f and pole pair number P of the rotating magnetic field of the generator.
3. The shafting torque measurement device verification platform according to claim 2, wherein the monitoring system calculates an actual shafting torque N according to the power generation parameters and by using formula (1);
formula (1):
wherein U is a voltage (V); i is current (A); f is frequency (Hz); p is the pole pair number of the rotating magnetic field of the motor.
4. The shafting torque measurement device verification platform according to claim 1, further comprising:
a motor drive for electrically connecting the motor to a power grid.
5. The shafting torque measurement device verification platform according to claim 1, further comprising:
a base on which the motor, the generator, and the load converter are disposed.
6. The shafting torque measurement device verification platform according to claim 5, further comprising:
a protective cover disposed on the platform.
7. The shafting torque measurement device verification platform of claim 1, wherein the load frequency converter is connected to a power grid, and the load frequency converter is configured to feed back electricity generated by the generator to the power grid.
8. A method for validating a shafting torque measurement device validation platform according to any one of claims 1 to 7, comprising the steps of:
acquiring power generation parameters of a generator;
calculating an actual value of shafting torque according to the acquired power generation parameters;
acquiring a shafting torque measured value measured by a shafting torque measuring device;
comparing the shafting torque actual value with the shafting torque measured value; if the difference value is smaller than the preset value, the shafting torque measuring device meets the requirement; and if the difference value is larger than the preset value, the shafting torque measuring device does not meet the requirement.
9. The method of claim 8, wherein the power generation parameters include voltage U, current I, frequency f, and number of pole pairs P of the rotating magnetic field of the generator.
10. The method of claim 9, wherein the step of calculating an actual value of shafting torque according to the obtained power generation parameters comprises:
calculating actual shafting torque N according to the power generation parameters and by a formula (1);
formula (1):
wherein U is a voltage (V); i is current (A); f is frequency (Hz); p is the pole pair number of the rotating magnetic field of the motor.
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| CN202011242063.XA CN114459673A (en) | 2020-11-09 | 2020-11-09 | Shafting torque measuring device verification platform and method |
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| CN202011242063.XA CN114459673A (en) | 2020-11-09 | 2020-11-09 | Shafting torque measuring device verification platform and method |
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