CN112729390A - Rotational speed and torque sensor and measuring system with rotational speed and torque sensor - Google Patents

Abstract

The invention discloses a rotating speed torque sensor which comprises a shell, a rotating shaft and a sensing unit, wherein a cavity is formed in the shell, the rotating shaft is rotatably arranged on the shell in a penetrating mode, at least part of the rotating shaft is located in the cavity, a measuring groove is formed in the rotating shaft, the sensing unit is arranged in the measuring groove, the sensing unit is sleeved on the rotating shaft, the outer peripheral surface of the sensing unit is connected with the inner wall of the cavity, and the inner peripheral surface of the sensing unit and the bottom surface of the measuring groove are arranged at intervals in the radial direction of the rotating shaft to form a measuring gap. The rotating speed torque sensor has the characteristics of simple structure, strong reliability and high measurement precision.

Description

Rotational speed and torque sensor and measuring system with rotational speed and torque sensor

Technical Field

The invention relates to the technical field of mechanical engineering sealing, in particular to a rotating speed and torque sensor and a measuring system with the rotating speed and torque sensor.

Background

At present, when the rotating speed and the torque of an output shaft of a drilling machine are measured, a measuring mechanism and a measuring shaft are of an integrated structure and are connected through the shaft, when the measuring mechanism is used for measuring, the measuring shaft swings and the like to the axial force generated by the measuring mechanism and the measuring shaft, so that the measuring mechanism is inaccurate in measuring result and even damaged.

Disclosure of Invention

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

document CN107576351A proposes a tachometric torque sensor and a tachometric torque sensor-based measurement system. However, through research, the inventor of the present application found and recognized that in the literature, the installation distance is reduced by only changing the original shaft connection into the flange connection. The applicant found and realized through research that in practical application, the flange connection still can not bear the axial force and the shaft can not swing during measurement. And need set up special bearing frame and bear axial thrust and prevent the device of measuring shaft wobbling, to the moment of torsion loss big, and when the moment of torsion changes because the driving chain is longer, there is the delay phenomenon in the measuring result.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a rotating speed torque sensor which can effectively reduce torque loss and improve measurement precision, and a measuring system which can bear axial thrust and has a compact structure and the rotating speed torque sensor.

The rotating speed and torque sensor comprises a shell, a rotating shaft and a sensing unit, wherein a cavity is formed in the shell, the rotating shaft is rotatably arranged on the shell in a penetrating mode, at least part of the rotating shaft is located in the cavity, a measuring groove is formed in the rotating shaft, the sensing unit is arranged in the measuring groove, the sensing unit is sleeved on the rotating shaft, the outer peripheral surface of the sensing unit is connected with the inner wall of the cavity, and the inner peripheral surface of the sensing unit and the bottom surface of the measuring groove are arranged at intervals in the radial direction of the rotating shaft to form a measuring gap.

The rotating speed and torque sensor is directly connected with a load, other supporting parts are not arranged in the middle, the torque loss can be minimized, the torque can be detected in real time, the rotating speed and torque sensor is in floating connection with the fixed support, the rotating speed and torque measuring device cannot be influenced when an output shaft is stressed and swings, and the measuring precision is improved.

In some embodiments, a first positioning groove is formed in the housing, the first positioning groove is located in the cavity, a first positioning ring is arranged on the rotating shaft, the first positioning ring is located in the first positioning groove, and the first positioning ring can move in the axial direction of the rotating shaft in the first positioning groove.

In some embodiments, a second positioning groove is formed in the housing, the second positioning groove is located in the cavity, a second positioning ring is arranged on the rotating shaft, the second positioning ring is located in the second positioning groove, and the second positioning ring can move in the axial direction of the rotating shaft in the second positioning groove.

In some embodiments, the first positioning groove and the second positioning groove are spaced apart in the axial direction of the rotating shaft, and the measuring groove is located between the first positioning ring and the second positioning ring.

In some embodiments, the rotational speed and torque sensor further includes a first sealing element, a first sealing groove is formed in the housing, the first sealing groove is located in the cavity, and the first sealing element is disposed in the first sealing groove.

In some embodiments, the rotational speed and torque sensor further includes a second sealing element, a second sealing groove is formed in the housing, the second sealing groove is located in the cavity, and the second sealing element is disposed in the second sealing groove.

In some embodiments, the first seal groove and the second seal groove are spaced apart from each other in the axial direction of the rotating shaft, and the first positioning groove and the second positioning groove are disposed between the first seal groove and the second seal groove, the first positioning groove is adjacent to the first seal groove, and the second positioning groove is adjacent to the second seal groove.

In some embodiments, the tacho torque sensor further comprises a support coupled to the housing to support the housing.

In some embodiments, the rotational speed and torque sensor further comprises a data line, the data line is arranged on the shell in a penetrating mode, and the data line is connected with the sensing unit and used for outputting measurement data.

An embodiment according to another aspect of the present invention also proposes a measuring system with a rotational speed torque sensor, comprising: the base, power assembly, load equipment and rotational speed torque sensor, rotational speed torque sensor includes the rotational speed torque sensor of above-mentioned embodiment. The measuring system provided by the embodiment of the invention has the characteristics of capability of bearing axial thrust and compact structure.

Drawings

Fig. 1 is a schematic structural diagram of a rotational speed torque sensor according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a measurement system having a tachometric torque sensor in accordance with an embodiment of the present invention.

Reference numerals:

the device comprises a base 1, a power assembly 2, a rotating speed and torque sensor 3, a shell 31, a cavity 311, a first positioning groove 312, a second positioning groove 313, a first sealing groove 314, a second sealing groove 315, a rotating shaft 32, a measuring groove 321, a first positioning ring 322, a second positioning ring 323, a first sealing element 33, a second sealing element 34, a sensing unit 35, a support 36, a data line 37 and a load device 4.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The rotational speed torque sensor 3 according to the embodiment of the present invention is described below with reference to the drawings.

The rotational speed torque sensor 3 according to the embodiment of the invention comprises a housing 31, a rotating shaft 32 and a sensing unit 35, wherein the housing 31 has a cavity 311, the rotating shaft 32 is rotatably disposed on the housing 31, at least a part of the rotating shaft 32 is located in the cavity 311, the rotating shaft 32 is provided with a measuring groove 321, the sensing unit 35 is disposed in the measuring groove 321, the sensing unit 35 is sleeved on the rotating shaft 32, the outer circumferential surface of the sensing unit 35 is connected with the inner wall of the cavity 311, and the inner circumferential surface of the sensing unit 35 and the bottom surface of the measuring groove 321 are arranged at intervals in the radial direction of the rotating shaft 32 to form a measuring gap.

As shown in fig. 1, the rotating shaft 32 passes through the chamber 311 in the housing 31, the rotating shaft 32 is rotatable in the chamber 311, the rotating shaft 32 is provided with a measuring groove 321, the measuring groove 321 is located in the middle of the rotating shaft 32, an annular sensing unit 35 is connected to the inner wall of the chamber 311 corresponding to the measuring groove 321 and used for measuring the rotating speed and the torque of the rotating shaft 32, a certain interval is provided between the inner circumferential surface of the sensing unit 35 and the bottom surface of the measuring groove 321, and when the rotating shaft 32 swings, the sensing unit 35 is not damaged.

The rotating speed and torque sensor 3 is directly connected with a load, no other supporting component is arranged in the middle, the torque loss can be minimized, the torque can be detected in real time, the rotating speed and torque sensor 3 and the fixed support 36 are in floating connection, the rotating speed and torque measuring device cannot be influenced when an output shaft is stressed and swings, and the measuring precision is improved.

In some embodiments, the housing 31 is provided with a first positioning groove 312, the first positioning groove 312 is located in the cavity 311, the rotating shaft 32 is provided with a first positioning ring 322, the first positioning ring 322 is located in the first positioning groove 312, and the first positioning ring 322 is movable in the first positioning groove 312 along the axial direction of the rotating shaft 32.

As shown in fig. 1, the first positioning ring 322 can slide left and right in the first positioning groove 312, so that the rotating shaft 32 cannot move greatly when bearing axial thrust, and the sensing unit 35 is prevented from being damaged, and meanwhile, the first positioning ring 322 and the first positioning groove 312 have a certain interval in the up-down direction, so that the rotating shaft 32 cannot collide with the first positioning ring 322 when swinging.

In some embodiments, the housing 31 has a second positioning groove 313, the second positioning groove 313 is located in the cavity 311, the rotating shaft 32 has a second positioning ring 323, the second positioning ring 323 is located in the second positioning groove 313, and the second positioning ring 323 is movable in the second positioning groove 313 along the axial direction of the rotating shaft 32.

As shown in fig. 1, the second positioning ring 323 can slide left and right in the second positioning groove 313, so that the rotating shaft 32 does not generate large displacement when bearing an axial thrust, and the sensing unit 35 is prevented from being damaged, and meanwhile, the second positioning ring 323 and the second positioning groove 313 have two fixed intervals in the vertical direction, so that the rotating shaft 32 does not collide with the second positioning ring 323 when swinging.

In some embodiments, the first positioning groove 312 and the second positioning groove 313 are spaced apart along the axial direction of the rotating shaft 32, and the measuring groove 321 is located between the first positioning ring 322 and the second positioning ring 323. As shown in fig. 1, the first positioning groove 312 and the second positioning groove 313 are spaced left and right, and the measuring groove 321 is provided between the first positioning ring 322 and the second positioning ring 323 on the rotating shaft 32.

In some embodiments, the rotational speed and torque sensor 3 further includes a first seal 33, the housing 31 is provided with a first seal groove 314, the first seal groove 314 is located in the cavity 311, and the first seal 33 is located in the first seal groove 314. As shown in fig. 1, the first sealing member 33 disposed in the first sealing groove 314 seals the chamber 311, thereby preventing foreign matters from entering the chamber 311 and affecting the sensing unit 35.

In some embodiments, the rotational speed and torque sensor 3 further includes a second seal 34, the housing 31 is provided with a second seal groove 315, the second seal groove 315 is located in the cavity 311, and the second seal 34 is located in the second seal groove 315. As shown in fig. 1, the second sealing member 34 disposed in the second sealing groove 315 can seal the chamber 311, so as to prevent foreign matters from entering the chamber 311 and affecting the sensing unit 35.

In some embodiments, the first seal groove 314 and the second seal groove 315 are spaced apart from each other in the axial direction of the rotating shaft 32, the first positioning groove 312 and the second positioning groove 313 are disposed between the first seal groove 314 and the second seal groove 315, the first positioning groove 312 is adjacent to the first seal groove 314, and the second positioning groove 313 is adjacent to the second seal groove 315.

As shown in fig. 1, the first sealing groove 314 is located at the left end of the housing 31, the second sealing groove 315 is located at the right end of the housing 31, the first positioning groove 312 is located at the right end of the first sealing groove 314, the second positioning groove 313 is located at the left end of the second sealing groove 315, and the first sealing groove 314 and the second sealing groove 315 seal the left and right ends of the chamber 311 to protect the components in the chamber 311.

In some embodiments, the rotational speed torque sensor 3 further includes a bracket 36, and the bracket 36 is connected to the housing 31 to support the housing 31. As shown in fig. 1, the bracket 36 is bolted to the housing 31 to support the housing 31.

In some embodiments, the rotational speed and torque sensor 3 further includes a data line 37, the data line 37 is disposed through the housing 31, and the data line 37 is connected to the sensing unit 35 for outputting measurement data. As shown in fig. 1, the data generated by the sensing unit 35 is transmitted to the external data end through the data line 37, and the data can be updated in real time through the connection of the data line 37.

An embodiment according to another aspect of the present invention also proposes a measuring system with a tacho torque sensor 3, the measuring system with the tacho torque sensor 3 comprising: the base 1, the power assembly 2, the load equipment 4 and the rotating speed torque sensor 3, wherein the rotating speed torque sensor 3 comprises the rotating speed torque sensor 3 of the embodiment. The measuring system provided by the embodiment of the invention has the characteristics of capability of bearing axial thrust and compact structure.

As shown in fig. 2, the measuring system having the rotational speed torque sensor 3 according to the embodiment of another aspect of the present invention outputs power through the output shaft of the power train 2 provided on the base 1, the output shaft is connected to the load device 4, the rotational speed torque sensor 3 is provided on the output shaft, and the rear end of the output shaft is integrated with the gyrator, so that the entire size is more compact.

A rotational speed torque sensor 3 according to some specific examples of the invention is described below with reference to fig. 1-2.

The rotational speed torque sensor 3 according to the embodiment of the present invention includes a housing 31, a rotating shaft 32, a first seal 33, a second seal 34, a sensing unit 35, a holder 36, and a data line 37.

As shown in fig. 1, a cavity 311 is provided in the casing 31, a first sealing groove 314, a second sealing groove 315, a first positioning groove 312 and a second positioning groove 313 are provided on the casing 31, the first sealing groove 314 is located at the left end of the casing 31, the first positioning groove 312 is provided on the right side of the first sealing groove 314, the second sealing groove 315 is provided on the right end of the casing 31, and the second positioning groove 313 is provided on the left side of the second sealing groove 315.

As shown in fig. 1, the first seal 33 is located within the first seal groove 314, the second seal 34 is located within the second seal groove 315, and the first seal 33 and the second seal 34 enclose the chamber 311.

As shown in fig. 1, the rotating shaft 32 is rotatably disposed through the housing 31, the rotating shaft 32 is provided with a first positioning ring 322, a second positioning ring 323 and a measuring groove 321, the first positioning ring 322 is located in the first positioning groove 312, and the first positioning ring 322 can slide left and right in the first positioning groove 312. The second positioning ring 323 is located in the second positioning groove 313, and the second positioning ring 323 can slide left and right in the second positioning groove 313.

The sensing unit 35 is disposed in the measuring groove 321, the sensing unit 35 is connected to the data line 37, the data line 37 is disposed on the housing 31, the housing 31 is connected to the bracket 36, and the bracket 36 supports the housing 31.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A rotational speed torque sensor, comprising:

a housing having a chamber therein;

the rotating shaft is rotatably arranged on the shell in a penetrating mode, at least part of the rotating shaft is located in the cavity, and a measuring groove is formed in the rotating shaft;

the sensing unit is arranged in the measuring groove, the rotating shaft is sleeved with the sensing unit, the outer peripheral surface of the sensing unit is connected with the inner wall of the cavity, and the inner peripheral surface of the sensing unit and the bottom surface of the measuring groove are arranged at intervals in the radial direction of the rotating shaft to form a measuring gap.

2. The rotational speed torque sensor according to claim 1, wherein a first positioning groove is formed in the housing, the first positioning groove is located in the chamber, a first positioning ring is formed in the rotating shaft, the first positioning ring is located in the first positioning groove, and the first positioning ring is movable in the first positioning groove in an axial direction of the rotating shaft.

3. The tacho torque transducer of claim 2, wherein a second detent is provided on the housing, the second detent being located in the chamber, and a second locating ring is provided on the shaft, the second locating ring being located in the second detent, the second locating ring being movable in the second detent in the axial direction of the shaft.

4. The tacho torque transducer of claim 3, wherein the first detent and the second detent are spaced apart in the axial direction of the shaft, and the measurement groove is located between the first detent ring and the second detent ring.

5. The rotational speed torque sensor according to claim 4, further comprising a first seal member, wherein the housing is provided with a first seal groove, the first seal groove is located in the chamber, and the first seal member is provided in the first seal groove.

6. The rotational speed torque sensor according to claim 5, further comprising a second seal, wherein a second seal groove is provided on the housing, the second seal groove is located in the chamber, and the second seal is provided in the second seal groove.

7. The rotational speed torque sensor according to claim 6, wherein the first and second seal grooves are arranged at intervals in an axial direction of the rotating shaft, and the first and second positioning grooves are provided between the first and second seal grooves, the first positioning groove being adjacent to the first seal groove, and the second positioning groove being adjacent to the second seal groove.

8. The tacho torque transducer of claim 1, further comprising a support connected to the housing to support the housing.

9. The rotational speed torque sensor according to claim 1, further comprising a data line, wherein the data line is arranged on the housing in a penetrating manner, and the data line is connected with the sensing unit for outputting measurement data.

10. A measurement system having a rotational speed torque sensor, comprising: a base, a powertrain, a load device and a tach sensor as claimed in any one of claims 1 to 9.

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