CN112284596A - Online torsion measuring method based on helical gear transmission system - Google Patents
Online torsion measuring method based on helical gear transmission system Download PDFInfo
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- CN112284596A CN112284596A CN202011345457.8A CN202011345457A CN112284596A CN 112284596 A CN112284596 A CN 112284596A CN 202011345457 A CN202011345457 A CN 202011345457A CN 112284596 A CN112284596 A CN 112284596A
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- piston
- torque
- helical gear
- lubricating oil
- transmission system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
Abstract
The invention discloses an online torsion measuring method based on a helical gear transmission system, wherein when the helical gear transmission system works, an axial force borne by a cylindrical helical gear is leftward, a torsion measuring piston is connected with the cylindrical helical gear, and the torsion measuring piston is simultaneously also stressed by the leftward axial force; the constant-pressure lubricating oil pump provides lubricating oil pressure at one side of the large end of the piston, and the torque measuring piston is subjected to rightward axial force; as the torque measuring piston moves left and right, the return oil of the torque measuring piston through the inner hole can change, and the axial force can maintain the dynamic balance of the torque measuring piston. According to the online torque measurement method based on the helical gear transmission system, the axial force borne by the gear is indirectly obtained by measuring the lubricating oil pressure, so that the transmission torque of the helical gear transmission system is obtained, the measurement precision is higher, the measurement range is wider, and sensitive online measurement can be realized.
Description
Technical Field
The invention belongs to the technical field of mechanical transmission systems, and particularly relates to an online torque measurement method based on a helical gear transmission system.
Background
In mechanical transmission systems, helical gearing is a common form. Various speed reducers use single-stage or multi-stage cylindrical helical gears to transmit and output power.
The helical gear transmission system transmits torque through a rotating shaft, which brings great difficulty to the measurement of the torque or power, especially to the speed reducer transmitting high power, such as a gas turbine, an aviation turboshaft engine and a ship. The traditional torsion measuring scheme indirectly measures the transmission torque by measuring the torsion angle between the torsion measuring shaft and the reference shaft, the torsion measuring device is limited by space, the torsion measuring precision is low, and the reaction is not sensitive enough.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the defects in the prior art and provides an online torque measurement method based on a helical gear transmission system.
The technical scheme is as follows: the invention discloses an online torque measurement method based on a bevel gear transmission system, which comprises the following steps:
when the helical gear transmission system works, the axial force borne by the cylindrical helical gear is leftward, the torsion measuring piston is connected with the cylindrical helical gear, and the torsion measuring piston is also stressed by the leftward axial force; the constant-pressure lubricating oil pump provides lubricating oil pressure at one side of the large end of the piston, and the torque measuring piston is subjected to rightward axial force; as the torque measuring piston moves left and right, the return oil of the torque measuring piston through the inner hole changes, and the axial force maintains the dynamic balance of the torque measuring piston;
when the torque transmitted by a transmission system is increased, the cylindrical helical gear drives the torque measuring piston to move leftwards, meanwhile, a gap between the left end of an inner hole of the torque measuring piston and the end face of the limit screw is reduced, the leakage amount of lubricating oil through the inner hole of the torque measuring piston is reduced, further, the pressure of lubricating oil in a left lubricating oil cavity is increased, when the pressure of the left cavity of the torque measuring piston is balanced with the leftward axial force of the cylindrical helical gear, the pressure of the left cavity of the torque measuring piston is equal to the leftward axial force of the cylindrical helical gear, and the torque transmitted by the gear can be;
when the torque transmitted by the transmission system is reduced, the cylindrical helical gear drives the torsion measuring piston to move rightwards, meanwhile, a gap between the left end of an inner hole of the torsion measuring piston and the end face of the limit screw is increased, the leakage amount of lubricating oil through the inner hole of the torsion measuring piston is increased, the pressure of lubricating oil in a lubricating oil cavity on the left side is reduced, when the lubricating oil is balanced with the axial force of the cylindrical helical gear on the left side, the pressure of the left cavity of the torsion measuring piston is equal to the axial force of the cylindrical helical gear on the left side, and the torque transmitted by the gear can.
Furthermore, the online torsion measuring mechanism based on the helical gear transmission system comprises a piston cover assembly, a first bearing, a cylindrical helical gear, a second bearing, a torsion measuring piston, a pressure sensor and a constant-pressure lubricating oil pump, wherein the piston cover assembly comprises a piston cover, one end of the torsion measuring piston is connected with the piston cover, and the other end of the torsion measuring piston is connected with the cylindrical helical gear through the second bearing;
the first bearing is used for supporting the cylindrical helical gear and enabling the cylindrical helical gear to move in a certain range in the axial direction;
the pressure sensor and the constant-pressure lubricating oil pump are respectively connected with the piston cover component through pipelines.
Further preferably, the piston cover assembly comprises a piston cover, a first O-shaped sealing ring, an inner collar, a retainer ring, a step sealing ring, a second O-shaped sealing ring, a nut and a limit screw, wherein the first O-shaped sealing ring, the inner collar, the retainer ring and the step sealing ring are mounted on the inner ring of the piston cover; the limiting screw penetrates through the piston cover and is fixed on the piston cover through a nut, and the second O-shaped sealing ring is used for sealing and limiting.
Further preferably, the torque measuring piston is of a hollow structure, and the balance between the pressure of a piston cavity and the axial force of the bevel gear is maintained by oil discharge of a central hole.
Further preferably, one end of the torque measuring piston is in interference connection with a step sealing ring in the piston cover assembly; the torque measuring piston moves axially within the piston head assembly and maintains a torque measuring piston cavity oil pressure.
Further preferably, the second bearing is pressed on the torque measuring piston through a shaft nut, and a blocking cover is mounted at the end of the second bearing in a sealing mode.
Further preferably, the first bearing comprises at least two bearings for supporting the cylindrical helical gear and allowing the cylindrical helical gear to move in a certain range in the axial direction and restricting the cylindrical helical gear from moving in the radial direction.
Further preferably, the first bearing is a cylindrical roller bearing, and the second bearing is a deep groove ball bearing.
Further preferably, the constant pressure lubricating oil pump is used for providing lubricating oil for the torsion measuring piston cavity.
Further preferably, the pressure sensor is used for measuring the lubricating oil pressure of the piston cavity of the torque measuring piston on line.
Further preferably, the pressure sensor is connected with a signal processing and displaying torque device.
Has the advantages that: the invention has the following beneficial effects:
(1) the torsion measuring mechanism provided by the invention adopts a special structural design, and the specific structural devices are reliable in connection and compact in layout; therefore, the torsion measuring mechanism provided by the invention has a more reasonable design structure, and is more integrated and complete in function;
(2) the torque measuring mechanism provided by the invention can indirectly obtain the axial force borne by the gear mainly by measuring the pressure of lubricating oil, so as to obtain the transmission torque of the bevel gear transmission system, and has the advantages of higher measurement precision, wider measurement range and capability of realizing sensitive online measurement.
Drawings
Fig. 1 is a schematic structural view of a torsion measuring mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a piston cover assembly according to an embodiment of the present invention.
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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The mechanism for online torque measurement based on the helical gear transmission system as shown in fig. 1 comprises a piston cover assembly 1, a first bearing 3, a cylindrical helical gear 4, a second bearing 7, a torque measurement piston 8, a pressure sensor 9 and a constant pressure lubricating oil pump 10, wherein the piston cover assembly 1 comprises a piston cover 11, one end of the torque measurement piston 8 is connected with the piston cover 11, and the other end of the torque measurement piston 8 is connected with the cylindrical helical gear 4 through the second bearing 7; the first bearing 3 is preferably a cylindrical roller bearing, and the second bearing 7 is preferably a deep groove ball bearing.
The first bearing 3 is used for supporting the cylindrical helical gear 4, the first bearing 3 comprises at least two cylindrical helical gears, the types of the two cylindrical helical gears can be the same or different, in the embodiment, two cylindrical helical gears are preferably adopted, and two end parts of each cylindrical helical gear 4 are respectively installed for supporting the cylindrical helical gear 4, enabling the cylindrical helical gear 4 to move in a certain range in the axial direction and restricting the cylindrical helical gear 4 from moving in the radial direction.
In this embodiment, as shown in fig. 2, the piston cap assembly 1 includes a piston cap 11, a first O-ring 12, an inner collar 13, a retainer ring 14, a stepped seal ring 15, a second O-ring 16, a nut 17, and a stop screw 18, wherein the first O-ring 12, the inner collar 13, the retainer ring 14, and the stepped seal ring 15 are mounted on an inner ring of the piston cap 11; the limit screw 18 penetrates through the piston cover 11, is fixed on the piston cover 11 through a nut 17, and is sealed and limited through the second O-ring 16.
The torsion measuring mechanism of the present embodiment generally comprises a set of piston cap assemblies 1, the piston cap assemblies 1 functioning as piston cylinders and seals.
The retainer ring 14 in the piston cover component 1 plays a role of pressing the first O-shaped sealing ring 12 and the step sealing ring 15, and the inner retainer ring 13 can be selectively opened and plays a role of limiting the axial movement of the retainer ring 14. The second O-ring 16 on the piston cap assembly 1 mainly plays a role of sealing at the position of a limit screw 18, and the limit screw 18 passes through the piston cap 11 and is fixedly arranged on the piston cap 11 through a nut 17.
In this embodiment, the piston cover assembly 1 and the reducer housing 2 are connected by a seam allowance and are fixed by bolts, and the sealing is performed by an end face or a seam allowance rubber ring.
In this embodiment, the cylindrical helical gear 4 is mounted on the reducer case 2 through the first bearing 3, the reducer case 2 is only partially illustrated in the drawing, and the structural shape thereof may be various, the mounting of the first bearing 3 on the reducer case 2 depends on its own mounting manner, and since the first bearing 3 is a cylindrical roller bearing, the cylindrical helical gear 4 is axially movable within a certain range.
The gear rotation direction of the cylindrical helical gear 4 should be designed according to the rotation direction and the axial force to the left.
In this embodiment, the torque measuring piston 8 is preferably a hollow structure, and the balance between the piston cavity pressure and the helical gear axial force is maintained by oil discharge through a central hole.
The large end (piston cavity end) of the torque measuring piston 8 is connected with a step sealing ring 15 in the piston cover assembly 1 in an interference mode, the torque measuring piston 8 can move left and right in the torque measuring piston 8, and the lubricating oil pressure of the left cavity of the torque measuring piston 8 can be maintained; survey and turn round piston 8 right-hand member and be connected with cylindrical helical gear 4 through second bearing 7, second bearing 7 compresses tightly on surveying turning round piston 8 with nut 6 for the axle, the existing sealed effect of turning round piston 8 hole outflow lubricating oil for second bearing 7 of surveying of tip interval blanking cover 5 (the lubrication of second bearing 7 is realized through surveying turning round piston 8 hole oil discharge promptly), also have the effect of interval second bearing 7 and cylindrical helical gear 4, second bearing 7 and cylindrical helical gear 4 hole interference connect, in order to guarantee can be along with cylindrical helical gear 4 axial displacement together.
In this embodiment, the piston cap assembly 1 is connected to the constant pressure lubricating oil pump 10 and the pressure sensor 9 through a pipeline, and the pressure sensor 9 is installed near the piston cap 11 or directly installed in the piston cap assembly 1, so as to directly measure the pressure change of the piston cavity. The constant pressure oil pump 10 is selected such that the pressure of the constant pressure oil pump 10 matches the axial force transmitted by the cylindrical helical gear 4.
The constant-pressure lubricating oil pump 10 supplies lubricating oil to one side (piston cavity) of the large end of the piston, the torsion measuring piston 8 can axially move along with the cylindrical helical gear 4, the pressure oil of the piston cavity and the axial force borne by the transmission of the cylindrical helical gear 4 achieve dynamic balance, the pressure of the piston cavity (namely the axial force transmitted by the helical gear) is measured by the pressure sensor 9, and further the torque transmitted by the helical gear transmission system is indirectly measured.
The piston diameter and the inner hole diameter of the torque measuring piston 8 are designed through reasonable calculation so as to ensure that the pressure balance of the piston is maintained in work.
Preferably in this example, as an embodiment: the step sealing ring 15 in the piston cover component 1 is preferably made of wear-resistant materials, and preferably made of polytetrafluoroethylene materials doped with molybdenum disulfide, so as to ensure that the torque measuring piston 8 can freely move axially in the piston cover component 1 and has good sealing performance.
Preferably in this example, as an embodiment: the end face of the limit screw 18 and the gap of the torque measuring piston 8 form a piston oil return path, so that the end face of the limit screw 18 in the piston cover assembly 1 is required to be smooth and have small roughness.
Preferably in this example, as an embodiment: the torque measuring mechanism needs to firstly carry out torque measuring correction of the system and determine the linear relation between the actual torque and the lubricating oil pressure so as to ensure the accuracy of the torque measuring.
In this embodiment, preferably, as one possible embodiment: the pressure sensor 9 is connected with a signal processing and displaying torque device, and the torque device can directly display the torque value measured by the pressure sensor 9 through the signal processing and displaying torque device.
The mechanism measuring method of the torque measurement comprises the following steps:
when the helical gear transmission system works, the axial force borne by the cylindrical helical gear 4 is leftward, the torsion measuring piston 8 is connected with the cylindrical helical gear 4, and the torsion measuring piston 8 is simultaneously also stressed by the leftward axial force; the constant-pressure lubricating oil pump 10 provides lubricating oil pressure at one side (a piston cavity) of the large end of the piston, and the torsion measuring piston 8 bears rightward axial force; as the torque measuring piston 8 moves left and right, the return oil of the torque measuring piston 8 through the inner hole changes, and the axial force maintains the dynamic balance of the torque measuring piston 8.
When the torque transmitted by the transmission system is increased, the cylindrical helical gear 4 drives the torque measuring piston 8 to move leftwards, meanwhile, a gap between the left end of the inner hole of the torque measuring piston 8 and the end face of the limit screw 18 is reduced, the leakage amount of lubricating oil through the inner hole of the torque measuring piston 8 is reduced, the pressure of lubricating oil in a lubricating oil cavity on the left side is increased, when the pressure of the left cavity of the torque measuring piston 8 is balanced with the axial force of the cylindrical helical gear 4 on the left side, the pressure of the left cavity of the torque measuring piston 8 is equal to the axial force of the cylindrical helical gear 4 on the left side.
When the torque transmitted by the transmission system is reduced, the cylindrical helical gear 4 drives the torsion measuring piston 8 to move rightwards, meanwhile, a gap between the left end of an inner hole of the torsion measuring piston 8 and the end face of the limit screw 18 is increased, the leakage amount of lubricating oil passing through the inner hole of the torsion measuring piston 8 is increased, further, the lubricating oil pressure of a left lubricating oil cavity is reduced, when the lubricating oil is balanced with the left axial force of the cylindrical helical gear 4, the left cavity pressure of the torsion measuring piston 8 is equal to the left axial force of the cylindrical helical gear 4, and the torque transmitted by the gear can be indirectly measured through calculation.
Therefore, the lubricating oil pressure of the left cavity of the torque measuring piston 8 and the left axial force of the cylindrical helical gear 4 keep dynamic balance constantly, the lubricating oil pressure can reflect the change of the torque of the transmission system, and the torque change condition of the transmission system is obtained through accurate measurement of the pressure sensor 9.
The torsion measuring mechanism provided by the embodiment of the invention has the following technical advantages:
the torsion measuring mechanism provided by the embodiment of the invention adopts a special structural design, and the specific structural devices are reliably connected and compactly distributed; therefore, the torsion measuring mechanism provided by the embodiment of the invention has a more reasonable design structure, and is more integrated and complete in function.
The torque measuring mechanism provided by the embodiment of the invention is mainly used for indirectly obtaining the axial force borne by the gear by measuring the lubricating oil pressure so as to further obtain the transmission torque of the bevel gear transmission system, and has the advantages of higher measurement precision, wider measurement range and capability of realizing sensitive online measurement.
Based on the above significant technical advantages, the torsion measuring mechanism provided by the invention has the advantages of bringing good market prospect and economic benefit.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An on-line torsion measuring method based on a bevel gear transmission system is characterized in that: the method comprises the following steps:
when the helical gear transmission system works, the axial force borne by the cylindrical helical gear is leftward, the torsion measuring piston is connected with the cylindrical helical gear, and the torsion measuring piston is also stressed by the leftward axial force; the constant-pressure lubricating oil pump provides lubricating oil pressure at one side of the large end of the piston, and the torque measuring piston is subjected to rightward axial force; as the torque measuring piston moves left and right, the return oil of the torque measuring piston through the inner hole changes, and the axial force maintains the dynamic balance of the torque measuring piston;
when the torque transmitted by a transmission system is increased, the cylindrical helical gear drives the torque measuring piston to move leftwards, meanwhile, a gap between the left end of an inner hole of the torque measuring piston and the end face of the limit screw is reduced, the leakage amount of lubricating oil through the inner hole of the torque measuring piston is reduced, further, the pressure of lubricating oil in a left lubricating oil cavity is increased, when the pressure of the left cavity of the torque measuring piston is balanced with the leftward axial force of the cylindrical helical gear, the pressure of the left cavity of the torque measuring piston is equal to the leftward axial force of the cylindrical helical gear, and the torque transmitted by the gear can be;
when the torque transmitted by the transmission system is reduced, the cylindrical helical gear drives the torsion measuring piston to move rightwards, meanwhile, a gap between the left end of an inner hole of the torsion measuring piston and the end face of the limit screw is increased, the leakage amount of lubricating oil through the inner hole of the torsion measuring piston is increased, the pressure of lubricating oil in a lubricating oil cavity on the left side is reduced, when the lubricating oil is balanced with the axial force of the cylindrical helical gear on the left side, the pressure of the left cavity of the torsion measuring piston is equal to the axial force of the cylindrical helical gear on the left side, and the torque transmitted by the gear can.
2. The on-line torque measurement method based on the bevel gear transmission system according to claim 1, characterized in that: the online torque measuring mechanism based on the bevel gear transmission system comprises:
the device comprises a piston cover assembly (1), a first bearing (3), a cylindrical helical gear (4), a second bearing (7), a torsion measuring piston (8), a pressure sensor (9) and a constant-pressure lubricating oil pump (10), wherein the piston cover assembly (1) comprises a piston cover (11), one end of the torsion measuring piston (8) is connected with the piston cover (11), and the other end of the torsion measuring piston (8) is connected with the cylindrical helical gear (4) through the second bearing (7);
the first bearing (3) is used for supporting the cylindrical helical gear (4) and enabling the cylindrical helical gear (4) to move within a certain range in the axial direction;
the pressure sensor (9) and the constant-pressure lubricating oil pump (10) are respectively connected with the piston cover assembly (1) through pipelines.
3. The on-line torque measurement method based on the bevel gear transmission system according to claim 2, characterized in that: the piston cover assembly (1) comprises a piston cover (11), a first O-shaped sealing ring (12), an inner clamping ring (13), a check ring (14), a step sealing ring (15), a second O-shaped sealing ring (16), a nut (17) and a limiting screw (18), wherein the first O-shaped sealing ring (12), the inner clamping ring (13), the check ring (14) and the step sealing ring (15) are mounted on the inner ring of the piston cover (11); the limiting screw (18) penetrates through the piston cover (11) and is fixed on the piston cover (11) through a nut (17), and sealing and limiting are carried out through the second O-shaped sealing ring (16).
4. The on-line torque measurement method based on the bevel gear transmission system according to claim 2, characterized in that: the torque measuring piston (8) is of a hollow structure, and the balance between the pressure of a piston cavity and the axial force of the bevel gear is maintained through oil discharge of a central hole.
5. The on-line torque measurement method based on the bevel gear transmission system according to claim 2, characterized in that: one end of the torque measuring piston (8) is connected with a step sealing ring (15) in the piston cover component (1) in an interference manner; the torque measuring piston (8) axially moves in the piston cover assembly (1) and maintains the piston cavity lubricating oil pressure of the torque measuring piston (8).
6. The on-line torque measurement method based on the bevel gear transmission system according to claim 2, characterized in that: the second bearing (7) is pressed on the torque measuring piston (8) through a nut (6) for a shaft, and the end part of the second bearing is provided with a blocking cover (5) in a sealing mode.
7. The on-line torque measurement method based on the bevel gear transmission system according to claim 2, characterized in that: the first bearings (3) comprise at least two bearings and are used for supporting the cylindrical helical gear (4) and enabling the cylindrical helical gear (4) to move within a certain range in the axial direction and restraining the cylindrical helical gear from moving in the radial direction.
8. The on-line torque measurement method based on the bevel gear transmission system according to claim 2, characterized in that: the first bearing (3) adopts a cylindrical roller bearing, and the second bearing (7) adopts a deep groove ball bearing.
9. The on-line torque measurement method based on the bevel gear transmission system according to claim 2, characterized in that: the constant-pressure lubricating oil pump (10) is used for providing lubricating oil for the piston cavity of the torque measuring piston (8).
10. The on-line torque measurement method based on the bevel gear transmission system according to claim 2, characterized in that: the pressure sensor (9) is used for measuring the pressure of the lubricating oil in the piston cavity of the torque measuring piston (8) on line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011345457.8A CN112284596A (en) | 2020-11-26 | 2020-11-26 | Online torsion measuring method based on helical gear transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011345457.8A CN112284596A (en) | 2020-11-26 | 2020-11-26 | Online torsion measuring method based on helical gear transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN112284596A true CN112284596A (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011345457.8A Withdrawn CN112284596A (en) | 2020-11-26 | 2020-11-26 | Online torsion measuring method based on helical gear transmission system |
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| CN (1) | CN112284596A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340500A (en) * | 2021-05-27 | 2021-09-03 | 中国航发南方工业有限公司 | Aeroengine torque measuring mechanism |
| CN113804448A (en) * | 2021-09-09 | 2021-12-17 | 中国航发南方工业有限公司 | Two-stage helical gear closed planetary gear reducer and turboprop engine thereof |
-
2020
- 2020-11-26 CN CN202011345457.8A patent/CN112284596A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340500A (en) * | 2021-05-27 | 2021-09-03 | 中国航发南方工业有限公司 | Aeroengine torque measuring mechanism |
| CN113804448A (en) * | 2021-09-09 | 2021-12-17 | 中国航发南方工业有限公司 | Two-stage helical gear closed planetary gear reducer and turboprop engine thereof |
| CN113804448B (en) * | 2021-09-09 | 2023-12-01 | 中国航发南方工业有限公司 | Two-stage helical gear closed planetary gear reducer and vortex paddle engine thereof |
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Application publication date: 20210129 |
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