CN106768746B - Torsion degree measuring method and device for large gear box base - Google Patents
Torsion degree measuring method and device for large gear box base Download PDFInfo
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- CN106768746B CN106768746B CN201611197676.XA CN201611197676A CN106768746B CN 106768746 B CN106768746 B CN 106768746B CN 201611197676 A CN201611197676 A CN 201611197676A CN 106768746 B CN106768746 B CN 106768746B
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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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
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- Aviation & Aerospace Engineering (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
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Abstract
The invention discloses a torsion degree measuring method for a large-sized gear box base, which is characterized in that a fixed bracket (5), a steel wire tensioning device (13), a distance block (29) and an indicating device (22) are used together with an inside micrometer (31), and each measuring line (2) on the gear box base (1) is accurately measured by measuring the distance between each measuring point on the gear box base (1) and a tensioned thin steel wire (12); the invention also discloses a torsion degree measuring device for the large-scale gear box base. The measuring device and the measuring method have the advantages of convenience in use and high efficiency.
Description
Technical Field
The invention relates to the field of ship construction, in particular to a torsion degree measuring method and device for a large-scale gear box base.
Background
To accommodate the energy savings and cabin layout flexibility requirements, more and more lng ship propulsion systems employ electric propulsion systems with reduction gearboxes. Compared with a diesel engine, the reduction gear box system has the advantages of small occupied space, low noise and vibration, low maintenance cost and the like, and is more convenient to use in daily life.
The marine propulsion system reduction gear box body comprises a shell, a driving gear, a propulsion gear, a thrust bearing and the like, wherein the driving gear receives torque transmitted by an electric propulsion motor and then transmits the torque to the propulsion gear through gear meshing, the rotating speed of a shafting is reduced in the process, and the torque is transmitted to the shafting and a propeller through the propulsion gear to finish acting on ship movement. A 174000m lng ship is equipped with 2 large reduction gearboxes, the body of which has an external dimension of about 6500mm 4300mm 4600mm (length by width by height) and a weight of more than 30 tons. The gear box is arranged at the front middle part of the cabin bottom of the series of ships, the matched pipelines around the gear box are crisscross, and the equipment is dense.
In the installation stage of the gearbox on the ship, namely before installing the gaskets of the gearbox base and fastening the connecting bolts, the torsion degree (namely the deflection value) of the gearbox base must be measured, and the height of the gearbox base is raised or lowered by the adjusting bolts installed on the gearbox base so that the deflection value of any measuring point meets the design requirement.
For a 174000m lng gearbox, the measurement points of deflection values are distributed on five predefined straight lines, and four measurement points are arranged on each line, wherein the two end points of the line head and the tail are defined as reference points of '0' height. The total station can be selected for measuring the torsion degree of the surface of the gear box base, but is not suitable for measuring the torsion degree of the gear box base, and the main reasons are as follows:
firstly, in order to meet the torsion requirement required by design, the gearbox base needs to be adjusted in height repeatedly through an adjusting bolt, multi-point deflection values need to be measured for each fine adjustment, the position of the total station is required not to change in the whole process, otherwise, the standard is required to be checked again, the narrow cabin is subjected to multi-species cross operation, the requirement is difficult to meet, and errors in adjustment are easily caused by inaccurate measurement values due to standard change; second, some measurement points distributed on each straight line are inside the frame structure of the gearbox, so that the measurement points are unlikely to be seen by the total station, and some measurement points cannot be measured.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the torsion degree measuring method and the torsion degree measuring device for the large-sized gear box base, which not only can improve the measuring precision, but also have lower requirements on the operation capability and the proficiency of operators, are easy to operate, and can effectively improve the working efficiency and reduce the working strength.
In order to achieve the above object, the present invention provides the following technical solutions:
a torsion degree measurement method for a large gearbox foundation, the method comprising the steps of:
the first step: drawing a plurality of measuring lines on a gear box base according to the specification and torsion measurement requirements of the gear box, wherein two ends of each measuring line are respectively provided with a reference measuring point, and the middle part of each measuring line is provided with a plurality of middle measuring points;
and a second step of: selecting a measuring line, respectively installing two fixing brackets at two ends of the measuring line through bolts, and determining that the fixing brackets are firmly installed, wherein each fixing bracket comprises a base, a fixing plate and inclined struts, the base is provided with bolt holes, the base is fixed on a gear box base through bolts penetrating through the bolt holes, the middle part of the outer side of the base is provided with a conductive contact, the bottom of the fixing plate is fixed on the base, the middle part of the upper end of the fixing plate is provided with an insulating flange, the inclined struts incline inwards, and the upper end and the lower end of each inclined strut are fixedly connected with the top of the fixing plate and the base respectively;
and a third step of: selecting a thin steel wire according to the length of a measuring line in the second step, arranging the thin steel wire right above the measuring line, enabling one end of the thin steel wire to be tied on a fixing bolt of a steel wire tensioning device, enabling the other end of the thin steel wire to pass through a central hole of an insulating flange of a sequentially fixed support and then to be fixed on a fixing piece, enabling the fixing piece to be located on the outer side of the central hole of the insulating flange far away from the steel wire tensioning device, enabling the steel wire tensioning device to comprise an inner sleeve, an outer sleeve, a spring and a screw rod assembly, wherein one end of the inner sleeve is sleeved in the outer sleeve, scales are arranged on the outer wall of the inner sleeve, the other end of the inner sleeve is connected with the insulating flange of an adjacent fixed support, the screw rod assembly comprises a basket nut, a screw rod and a fixing bolt, the screw rod is located on the central lines of the inner sleeve and the outer sleeve, the fixing bolt is arranged at one end of the screw rod, the other end of the screw rod extends out of the outer sleeve and is sleeved with the basket nut, the spring is arranged in the outer sleeve, the extending direction of the spring is consistent with the extending direction of the screw rod, two ends of the spring are respectively contacted with the inner sleeve and the outer sleeve, and the tension of the spring is correspondingly matched with the scales on the inner sleeve;
fourth step: after the third step is completed, reading the scale on the inner sleeve, and simultaneously continuously screwing the basket nut until the thin steel wire is straightly tensioned, wherein the reading of the scale does not exceed the maximum bearing tension of the thin steel wire;
fifth step: after the fourth step is completed, one conductive clamp of the indicating device is clamped on a conductive contact which is closest to the conductive clamp, the other conductive clamp is clamped on one end of the lead screw, which extends out of the outer sleeve, the indicating device comprises a square shell, a power supply, a switch, an indicating lamp and two conductive clamps, the switch and the indicating lamp are arranged at the top of the square shell, the power supply is arranged in the square shell, the two conductive clamps are respectively connected onto two ports of the square shell through wires, and two ends of the power supply, the switch and the indicating lamp which are connected in series are respectively connected onto the two ports through wires, and the two ports are disconnected;
sixth step: after the fifth step is completed, respectively placing a distance block at reference measuring points at two ends of the measuring line, wherein the distance between the thin steel wire at the reference measuring points and the gear box base is equal, the distance blocks are cylindrical sample rods, and insulating paint is coated at the upper end and the lower end of the distance blocks;
seventh step: after the sixth step is completed, the switch is put into a closed state, then, each intermediate measuring point is measured by an inside micrometer, an accurate deflection value of the gear box base is determined through the state of the indicator lamp and is compared with a design value, and an adjusting bolt on the gear box base is adjusted until the torsion degree of the gear box base reaches the design value;
eighth step: repeating the second step to the seventh step to finish the deflection value measurement and adjustment operation of the rest measurement lines;
ninth step: putting the switch to an off state, taking down the conductive clamp, and then removing the indicating device and the distance block;
tenth step: unscrewing the basket nut, taking down the thin steel wire from the screw rod and the fixing piece, and removing the steel wire tensioning device;
eleventh step: loosening bolts between the connecting base and the gear box base, and removing the fixing support;
twelfth step: the indicating device, the distance block, the steel wire tensioning device and the fixing support are folded and placed for the next use.
In the torsion degree measuring method for the large-sized gear box engine base, the surfaces of the reference measuring point, the middle measuring point and the thin steel wire are kept smooth.
In the torsion measuring method for the large-sized gear box base according to the invention, the accuracy of the inside micrometer is corrected before the sixth step is performed.
In the torsion degree measuring method for the large-sized gear box base, in the sixth step, the distance between the thin steel wire at the two reference measuring points and the gear box base is measured and calibrated through the inside micrometer, and the positions of the distance blocks are adjusted to enable the positioning blocks to coincide with the reference measuring points.
The invention also discloses a torsion measuring device for a large-sized gear box base, the device comprises two fixed brackets, two distance blocks, a steel wire tensioning device and an indicating device, wherein the two fixed brackets are respectively positioned at two ends of a measuring line arranged on the gear box base, the two ends of the measuring line are respectively provided with a reference measuring point, a plurality of middle measuring points are also arranged on the measuring line, the fixed brackets comprise a base, a fixed plate and an inclined strut, the base is provided with a bolt hole, the base is fixed on the gear box base through the bolt hole by a bolt, the middle part of the outer side of the base is provided with a conductive contact, the bottom of the fixed plate is fixed on the base, the middle part of the upper end of the fixed plate is provided with an insulating flange, the inclined strut is inclined inwards inclined, the upper end and the lower end of the inclined strut are respectively fixedly connected with the top of the fixed plate and the base, the two distance blocks are respectively arranged at the two reference measuring points, a thin steel wire is arranged right above the measuring line, one end of the thin steel wire is tied on the fixed bolt of the tensioning device, the thin other end passes through the fixed flange of the fixed bolt of the inner sleeve, the thin end of the wire tensioning device is sequentially arranged on the fixed sleeve, the middle part passes through the center hole of the fixed bracket, the insulating flange of the fixed part is positioned on the wire rod, the inner sleeve is positioned at the outer sleeve, the outer sleeve is positioned at a distance sleeve assembly is positioned near the outer sleeve assembly, the outer sleeve assembly is positioned near the center of the outer sleeve wire sleeve is positioned near the outer sleeve assembly, the outer sleeve assembly is positioned near the outer sleeve wire assembly, the outer sleeve is positioned near the outer sleeve and the outer sleeve, the outer sleeve is positioned near the outer sleeve, and the outer sleeve is positioned near the outer sleeve, the utility model provides a wire, including outer tube, spring, wire, switch, indicator, square casing, outer tube, the other end of lead screw stretches out the outer tube and cup joints basket nut, the spring is established in the outer tube, the flexible direction of spring is unanimous with lead screw extending direction, the both ends of spring contact with interior sleeve pipe and outer tube respectively, the pulling force of spring is corresponding with the scale on the interior sleeve pipe, indicating device includes square casing, power, switch, pilot lamp and two conductive clamp, switch and pilot lamp all establish at square casing's top, the power is established inside square casing, two conductive clamp pass through the wire and connect respectively on square casing's two ports, the both ends after power, switch and pilot lamp establish ties are connected respectively at two ports through the wire, two ports between break off, one of them conductive clamp press from both sides on the conductive contact that is closest with it, another conductive clamp presss from both sides on the one end that the lead screw stretches out the outer tube.
In the torsion degree measuring device for the large-sized gear box machine seat, the distance blocks are cylindrical sample rods, insulating paint is coated on the upper end and the lower end of the distance blocks, and the heights of the two distance blocks are equal.
Further, the distance blocks have a height equal to the distance between the wire at the reference measuring point and the gearbox foundation.
Further, the insulating coating on the distance blocks comprises epoxy resin.
In the torsion degree measuring device for the large-sized gear box base, the conductive contact is detachably connected with the base through threads.
In the torsion measuring device for the large-sized gear box stand, the fixing plates on the two fixing brackets are parallel to each other.
Based on the technical scheme, compared with the prior art, the invention has the following advantages:
1. by using the fixing support, the distance, the steel wire tensioning device and the indicating device, and matching with the use of the thin steel wire and the inside micrometer, the operation in the process of measuring the torsion degree of the gear box base can be simpler and more convenient, the requirements of the operation capacity and the proficiency of operators are reduced, and the working efficiency is improved.
2. The method and the device can effectively reduce the labor intensity in the work of measuring the torsion degree of the gear box base, and reduce the working intensity, thereby saving the labor cost.
3. The invention measures the torsion degree of the gear box by placing the distance block on the reference measuring point and measuring the distance between the fine steel wire and the gear box base after tensioning the fine steel wire, thereby having higher measuring precision.
Drawings
FIG. 1 is a graph showing the line of torsion measurement of the gear box foundation of a 174000m liquefied natural gas carrier.
Fig. 2 is a schematic diagram of the operation of the measuring device of the present invention.
Figure 3 is a schematic view of the structure of the distance block according to the invention.
Fig. 4 is a front view of the fixing bracket of the present invention.
Fig. 5 is a side view of the fixing bracket of the present invention.
Fig. 6 is a top view of the fixing bracket of the present invention.
Fig. 7 is an enlarged view of the part a structure in fig. 4.
Fig. 8 is an enlarged view of the part B structure in fig. 4.
Fig. 9 is a schematic view of the structure of the wire tensioning device of the present invention.
Fig. 10 is a cross-sectional view of the wire tensioning device of the present invention.
Fig. 11 is an enlarged view of the C portion structure in fig. 10.
Fig. 12 is a schematic view of the structure of the indication device of the present invention.
Detailed Description
The torsion measuring method and apparatus for a large-sized gear housing according to the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments, so as to make the structural type and usage of the apparatus more clearly understood, but not to limit the scope of the present invention.
As shown in fig. 1, in the case of a 174000m lng gearbox, five measuring lines 2 are provided on a gearbox housing 1, the measuring lines 2 are straight lines, two reference measuring points 3 are provided at two ends of the measuring lines 2, and two middle measuring points 4 are provided in the middle of the measuring lines 2.
As shown in fig. 2, the torsion measuring device for the large gear box stand comprises two fixing brackets 5, two distance blocks 29, a steel wire tensioning device 13 and an indicating device 22, wherein the two fixing brackets 5 are respectively positioned at two ends of a measuring line 2 arranged on the gear box stand 1, two ends of the measuring line 2 are respectively provided with a reference measuring point 3, and a plurality of middle measuring points 4 are also arranged on the measuring line 2.
As shown in fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8, the fixed support 5 comprises a base 6, a fixed plate 7 and an inclined strut 8, a bolt hole 9 is formed in the base 6, the base 6 passes through the bolt hole 9 to be fixed on the gearbox base 1 through a bolt, a conductive contact 10 is arranged in the middle of the outer side of the base 6, the conductive contact 10 is detachably connected with the base 6 through threads, the bottom of the fixed plate 7 is fixed on the base 6, the fixed plates 7 on the two fixed supports 5 are parallel to each other, an insulating flange 11 is arranged in the middle of the upper end of the fixed plate 7, the insulating flange 11 is made of nylon, and the upper end and the lower end of the inclined strut 8 are respectively fixedly connected with the top of the fixed plate 7 and the base 6.
As shown in fig. 3, the two distance blocks 29 are respectively arranged at two reference measuring points 3, the distance blocks 29 are cylindrical iron sample rods, insulating paint 30 is coated at the upper end and the lower end of each distance block 29, the heights of the two distance blocks 29 are equal, the height of each distance block 29 is equal to the distance between the thin steel wire 12 at the reference measuring point 3 and the gear box base 1, and the insulating paint 30 on each distance block 29 comprises epoxy resin.
As shown in fig. 9, 10 and 11, the steel wire tensioning device 13 comprises an inner sleeve 15, an outer sleeve 16, a spring 17 and a screw rod assembly, one end of the inner sleeve 15 is sleeved in the outer sleeve 16, a scale 18 is arranged on the outer wall of the inner sleeve 15, the other end of the inner sleeve 15 is connected with an insulation flange 11 of an adjacent fixed support 5, the screw rod assembly comprises a basket nut 19, a screw rod 20 and a fixing bolt 21, the screw rod 20 penetrates through the inner sleeve 15 and the outer sleeve 16, the screw rod 20 is positioned on the central line of the inner sleeve 15 and the outer sleeve 16, the fixing bolt 21 is arranged at one end of the screw rod 20, the other end of the screw rod 20 extends out of the outer sleeve 16 and is sleeved with the basket nut 19, the spring 17 is arranged in the outer sleeve 16, the extension direction of the spring 17 is consistent with the extension direction of the screw rod 20, two ends of the spring 17 are respectively contacted with the inner sleeve 15 and the outer sleeve 16, and the pulling force of the spring 17 corresponds to the scale 18 on the inner sleeve 15.
As shown in fig. 12, the indication device 22 includes a square housing 24, a power supply 25, a switch 26, an indication lamp 27, and two conductive clamps 23, where the switch 26 and the indication lamp 27 are both disposed at the top of the square housing 24, the power supply 25 is disposed inside the square housing 24, the power supply 25 may be a dry battery, the dry battery is taken out when not used for a long time, and is assembled when in use, the two conductive clamps 23 are respectively connected to two ports 28 of the square housing 24 through wires, two ends of the power supply 25, the switch 26, and the indication lamp 27 after being connected in series are respectively connected to the two ports 28 through wires, the two ports 28 are disconnected, one of the conductive clamps 23 is clamped on the conductive contact 10 closest to the conductive clamp, and the other conductive clamp 23 is clamped on one end of the lead screw 20 extending out of the outer sleeve 16.
As shown in fig. 1, a torsion degree measuring method for a large gear box housing includes the steps of:
the first step: drawing a plurality of measuring lines 2 on a gear box base 1 according to the specification and torsion measurement requirements of the gear box, wherein two ends of each measuring line 2 are respectively provided with a reference measuring point 3, the middle part of each measuring line 2 is provided with a plurality of middle measuring points 4, and the surfaces of the reference measuring points 3 and the middle measuring points 4 are kept smooth;
and a second step of: selecting a measuring line 2, respectively installing two fixing brackets 5 at two ends of the measuring line 2 through bolts, and determining that the fixing brackets 5 are firmly installed, wherein each fixing bracket 5 comprises a base 6, a fixing plate 7 and inclined struts 8, each base 6 is provided with a bolt hole 9, each base 6 is fixed on a gear box base 1 through the corresponding bolt hole 9, the middle part of the outer side of each base 6 is provided with a conductive contact 10, the bottom of each fixing plate 7 is fixed on each base 6, the middle part of the upper end of each fixing plate 7 is provided with an insulating flange 11, each inclined strut 8 is inclined inwards, and the upper end and the lower end of each inclined strut 8 are respectively fixedly connected with the top of each fixing plate 7 and each base 6;
and a third step of: selecting a fine steel wire 12 according to the length of the measuring wire 2 in the second step, wherein the surface of the fine steel wire 12 is kept smooth and free from oil stains and dust, the diameter of the fine steel wire 12 is 0.5mm, the maximum bearing tension of the fine steel wire 12 is 500N, the fine steel wire 12 is arranged right above the measuring wire 2, one end of the fine steel wire 12 is tied on a fixing bolt 21 of a steel wire tensioning device 13, the other end of the fine steel wire 12 passes through a central hole of an insulating flange 11 of a sequentially fixed support 5 and is then fixed on a fixing piece 14, the fixing piece 14 is positioned outside the central hole of the insulating flange 11 far from the steel wire tensioning device 13, the fixing piece 14 is a set of bolt and nut, the steel wire tensioning device 13 comprises an inner sleeve 15, an outer sleeve 16, a spring 17 and a screw rod assembly, one end of the inner sleeve 15 is sleeved in the outer sleeve 16, the outer wall of the inner sleeve 15 is provided with scales 18, the other end of the inner sleeve 15 is connected with an insulating flange 11 of an adjacent fixed bracket 5, the screw rod assembly comprises a basket nut 19, a screw rod 20 and a fixed bolt 21, the screw rod 20 passes through the inner sleeve 15 and the outer sleeve 16, the screw rod 20 is positioned on the central line of the inner sleeve 15 and the outer sleeve 16, one end of the screw rod 20 is provided with the fixed bolt 21, the other end of the screw rod 20 extends out of the outer sleeve 16 and is sleeved with the basket nut 19, the spring 17 is arranged in the outer sleeve 16, the extension direction of the spring 17 is consistent with the extension direction of the screw rod 20, one end of the spring 17 is contacted with the bottom of the inner sleeve 15, the other end of the spring 17 is contacted with the bottom of the outer sleeve 16, the bottom of the outer sleeve 16 is of a circular plate-shaped structure capable of moving along the inner wall of the outer sleeve 16, the tension of the spring 17 corresponds to the graduations 18 on the inner sleeve 15;
fourth step: after the third step is completed, reading the scale 18 on the inner sleeve 15 and simultaneously continuously screwing the basket nut 19 until the reading of the scale 18 reaches 400N, and at the moment, the thin steel wire 12 is pulled straight;
fifth step: after the fourth step is completed, one conductive clamp 23 of the indicating device 22 is clamped on the conductive contact 10 closest to the conductive clamp 23, the other conductive clamp 23 is clamped on one end of the screw rod 20 extending out of the outer sleeve 16, the indicating device 22 comprises a square shell 24, a power supply 25, a switch 26, an indicating lamp 27 and two conductive clamps 23, the switch 26 and the indicating lamp 27 are arranged at the top of the square shell 24, the power supply 25 is arranged inside the square shell 24, the two conductive clamps 23 are respectively connected to two ports 28 of the square shell 24 through wires, and two ends of the power supply 25, the switch 26 and the indicating lamp 27 which are connected in series are respectively connected to the two ports 28 through wires, and the two ports 28 are disconnected;
sixth step: after the fifth step is completed, correcting the precision of the inside micrometer 31, measuring and correcting the distance between the thin steel wire 12 at the two reference measuring points 3 and the gear box base 1 through the inside micrometer 31, respectively placing a distance block 29 at the reference measuring points 3 at the two ends of the measuring line 2, adjusting the positions of the distance blocks 29 to enable the positioning blocks to coincide with the positions of the reference measuring points 3, wherein the reference measuring points 3 are positioned on the same horizontal plane, the distance between the thin steel wire 12 at the reference measuring points 3 and the gear box base 1 is equal, the distance blocks 29 are cylindrical sample rods, and insulating paint 30 is coated at the upper end and the lower end of each distance block 29;
seventh step: after the sixth step is completed, the switch 26 is put into a closed state, then the inside micrometer 31 is used for measuring each middle measuring point 4, when the indicator lamp 27 is just on, the recorded data of the inside micrometer 31 is the deflection value of the current gear box machine seat 1, the deflection value of the current gear box machine seat 1 is compared with the design value, and the adjusting bolt 32 on the gear box machine seat 1 is adjusted until the torsion degree of the current gear box machine seat 1 reaches the design value;
eighth step: repeating the second step to the seventh step to finish the deflection value measurement and adjustment operation of the rest measuring lines 2;
ninth step: placing the switch 26 in an off state, removing the conductive jaw 23, and then removing the indicating device 22 and the distance block 29;
tenth step: unscrewing the basket nut 19, removing the thin steel wire 12 from the screw rod 20 and the fixing piece 14, and removing the steel wire tensioning device 13;
eleventh step: loosening bolts between the connecting base 6 and the gearbox base 1, and removing the fixed bracket 5;
twelfth step: the indicating device 22, the distance blocks 29, the wire tensioning device 13 and the fixing support 5 are retracted and put away for the next use.
It goes without saying that a torsion-resistance measuring method and device for a large gearbox foundation comprises, in addition to the types and modes described in the above examples, other similar constructional forms and fixed connection. In summary, the present invention also includes other variations and alternatives that will be apparent to those skilled in the art.
Claims (10)
1. A torsion degree measuring method for a large gearbox foundation, the method comprising the steps of:
the first step: drawing a plurality of measuring lines (2) on a gear box base (1) according to the specification and torsion measurement requirements of the gear box, wherein two ends of each measuring line (2) are respectively provided with a reference measuring point (3), and the middle part of each measuring line (2) is provided with a plurality of middle measuring points (4);
and a second step of: selecting a measuring line (2), respectively installing two fixing brackets (5) at two ends of the measuring line (2) through bolts, determining that the fixing brackets (5) are firmly installed, wherein each fixing bracket (5) comprises a base (6), a fixing plate (7) and a diagonal brace (8), a bolt hole (9) is formed in each base (6), each base (6) is fixed on a gear box base (1) through the corresponding bolt hole (9), a conductive contact (10) is formed in the middle of the outer side of each base (6), the bottom of each fixing plate (7) is fixed on each base (6), an insulating flange (11) is arranged in the middle of the upper end of each fixing plate (7), each diagonal brace (8) is inclined inwards, and the upper end and the lower end of each diagonal brace (8) are fixedly connected with the top of each fixing plate (7) and each base (6);
and a third step of: selecting a fine steel wire (12) according to the length of a measuring line (2) in the second step, arranging the fine steel wire (12) right above the measuring line (2) and enabling one end of the fine steel wire (12) to be tied on a fixing bolt (21) of a steel wire tensioning device (13), fixing the other end of the fine steel wire (12) on a fixing piece (14) after penetrating through a central hole of an insulating flange (11) of a sequentially fixed support (5), wherein the fixing piece (14) is positioned outside the central hole of the insulating flange (11) far away from the steel wire tensioning device (13), the steel wire tensioning device (13) comprises an inner sleeve (15), an outer sleeve (16), a spring (17) and a screw rod assembly, one end of the inner sleeve (15) is sleeved in the outer sleeve (16), scales (18) are arranged on the outer wall of the inner sleeve (15), the other end of the inner sleeve (15) is connected with the insulating flange (11) of an adjacent fixed support (5), the screw rod assembly comprises a flower nut (19), a screw rod (20) and a fixing bolt (21), one end of the screw rod (20) is positioned on the outer sleeve (20), the other end of the screw rod (20) extends out of the outer sleeve (16) and is sleeved with a basket nut (19), the spring (17) is arranged in the outer sleeve (16), the extending and contracting direction of the spring (17) is consistent with the extending direction of the screw rod (20), two ends of the spring (17) are respectively contacted with the inner sleeve (15) and the outer sleeve (16), and the pulling force of the spring (17) corresponds to a scale (18) on the inner sleeve (15);
fourth step: after the third step is completed, reading the scale (18) on the inner sleeve (15) and simultaneously continuously screwing the basket nut (19) until the thin steel wire (12) is straightly tensioned, and at the moment, reading the scale (18) does not exceed the maximum bearing tension of the thin steel wire (12);
fifth step: after the fourth step is completed, one conductive clamp (23) of the indicating device (22) is clamped on the conductive contact (10) closest to the conductive clamp, the other conductive clamp (23) is clamped on one end of the screw rod (20) extending out of the outer sleeve (16), the indicating device (22) comprises a square shell (24), a power supply (25), a switch (26), an indicating lamp (27) and two conductive clamps (23), the switch (26) and the indicating lamp (27) are arranged at the top of the square shell (24), the power supply (25) is arranged inside the square shell (24), the two conductive clamps (23) are respectively connected to two ports (28) of the square shell (24) through wires, and two ends of the power supply (25), the switch (26) and the indicating lamp (27) after being connected in series are respectively connected to the two ports (28) through wires, and the two ports (28) are disconnected;
sixth step: after the fifth step is completed, a distance block (29) is respectively placed at the reference measuring points (3) at the two ends of the measuring line (2), the distance between the thin steel wire (12) at the reference measuring point (3) and the gear box base (1) is equal, the distance block (29) is a cylindrical sample rod, and insulating paint (30) is coated at the upper end and the lower end of the distance block (29);
seventh step: after the sixth step is completed, the switch (26) is put into a closed state, then, each intermediate measuring point (4) is measured by an inside micrometer (31), an accurate deflection value of the gear box base (1) is determined through the state of the indicator lamp (27), the deflection value is compared with a design value, and an adjusting bolt (32) on the gear box base (1) is adjusted until the torsion degree of the gear box base (1) reaches the design value;
eighth step: repeating the second step to the seventh step to finish the deflection value measurement and adjustment operation of the rest measurement lines (2);
ninth step: placing the switch (26) in an off state, removing the conductive jaw (23), and then removing the indicating device (22) and the distance block (29);
tenth step: unscrewing the basket nut (19), removing the thin steel wire (12) from the screw rod (20) and the fixing piece (14), and removing the steel wire tensioning device (13);
eleventh step: loosening bolts between the connecting base (6) and the gear box base (1), and removing the fixed bracket (5);
twelfth step: the indicating device (22), the distance block (29), the steel wire tensioning device (13) and the fixed bracket (5) are retracted and put away for the next use.
2. A torsion degree measuring method for a large gearbox foundation according to claim 1, characterized in that the surfaces of the reference measuring point (3), the intermediate measuring point (4) and the thin wire (12) remain clean.
3. A torsion degree measuring method for a large gearbox foundation according to claim 1, characterized in that the accuracy of the inside micrometer (31) is corrected before the sixth step is performed.
4. A torsion degree measuring method for a large gearbox foundation according to claim 1, characterized in that in the sixth step the distance between the wire (12) at the two reference measuring points (3) and the gearbox foundation (1) is measured and calibrated by means of an inside micrometer (31), and the distance block (29) is adjusted in position so that the positioning block coincides with the reference measuring point (3).
5. The utility model provides a torsion measuring device for large-scale gear box frame, its characterized in that, the device includes two fixed bolster (5), two distance pieces (29), wire overspeed device tensioner (13) and indicating device (22), and two fixed bolster (5) are located respectively and establish the both ends of measuring line (2) on gear box frame (1), the both ends of measuring line (2) are equipped with a benchmark measuring point (3) respectively, still are equipped with a plurality of intermediate measuring point (4) on measuring line (2), fixed bolster (5) include base (6), fixed plate (7) and bracing (8) be equipped with bolt hole (9) on base (6), base (6) pass bolt hole (9) through the bolt and fix on gear box frame (1) the outside middle part of base (6) is equipped with conductive contact (10), fixed plate (7) bottom is fixed on base (6), is equipped with insulating flange (11) in the upper end middle part of fixed plate (7), bracing (8) inwards slope, two fixed plate (8) are connected with two fixed points (3) respectively on base (3) are established respectively to the distance piece (3), one end of the thin steel wire (12) is tied on a fixing bolt (21) of the steel wire tensioning device (13), the other end of the thin steel wire (12) penetrates through a central hole of an insulating flange (11) of the fixed support (5) in sequence and then is fixed on a fixing piece (14), the fixing piece (14) is positioned at the outer side of the central hole of the insulating flange (11) far away from the steel wire tensioning device (13), the steel wire tensioning device (13) comprises an inner sleeve (15), an outer sleeve (16), a spring (17) and a screw rod assembly, one end of the inner sleeve (15) is sleeved in the outer sleeve (16), a scale (18) is arranged on the outer wall of the inner sleeve (15), the other end of the inner sleeve (15) is connected with the insulating flange (11) of the adjacent fixed support (5), the screw rod assembly comprises a basket nut (19), a screw rod (20) and a fixing bolt (21), the screw rod (20) is positioned on the central line of the inner sleeve (15) and the outer sleeve (16), one end of the screw rod (20) is provided with a bolt (19) which extends out, the utility model provides a wire lead screw, including outer tube (16) and outer tube (16), spring (17) are established in outer tube (16), the flexible direction of spring (17) is unanimous with lead screw (20) extending direction, the both ends of spring (17) are contacted with interior sleeve pipe (15) and outer tube (16) respectively, the pulling force of spring (17) is corresponding with scale (18) on interior sleeve pipe (15), indicating device (22) include square casing (24), power (25), switch (26), pilot lamp (27) and two electrically conductive pincers (23), switch (26) and pilot lamp (27) all establish at the top of square casing (24), power (25) are established inside square casing (24), two electrically conductive pincers (23) are connected respectively on two ports (28) of square casing (24) through the wire, the both ends after power (25), switch (26) and pilot lamp (27) establish ties are connected respectively at two ports (28) through the wire, two ports (28) between disconnection pincers (23), one of them electrically conductive pincers (23) stretch out on the electrically conductive one end (20) of the nearest electrically conductive pincers (10) of contact (20) of the outer tube.
6. The torsion degree measuring device for a large gear box foundation according to claim 5, wherein the distance blocks (29) are cylindrical sample bars, insulating paint (30) is coated on the upper and lower ends of the distance blocks (29), and the heights of the two distance blocks (29) are equal.
7. A torsion degree measuring device for large gear box stands according to claim 6, characterized in that the distance blocks (29) have a height equal to the distance between the wire (12) at the reference measuring point (3) and the gear box stand (1).
8. A torsion degree measuring device for large gearbox housing according to claim 6, characterized in that the insulating paint (30) on the distance blocks (29) comprises epoxy resin.
9. A torsion-angle measuring device for large gearbox housings according to claim 5, characterized in that the electrically conductive contact (10) is detachably connected to the base (6) by means of a screw thread.
10. A torsion-angle measuring device for large gearbox housing according to claim 5, characterized in that the fixing plates (7) on the two fixing brackets (5) are parallel to each other.
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| CN201611197676.XA CN106768746B (en) | 2016-12-22 | 2016-12-22 | Torsion degree measuring method and device for large gear box base |
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| CN201611197676.XA CN106768746B (en) | 2016-12-22 | 2016-12-22 | Torsion degree measuring method and device for large gear box base |
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| CN109374243B (en) * | 2018-11-18 | 2024-02-02 | 中航天水飞机工业有限责任公司 | Mechanism deflection value measurer |
| CN109724732A (en) * | 2018-12-12 | 2019-05-07 | 西安近代化学研究所 | A kind of explosion wave pressure effect target of depth automatic measurement |
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| US5096384A (en) * | 1990-07-27 | 1992-03-17 | The Marley Cooling Tower Company | Plastic fan blade for industrial cooling towers and method of making same |
| CN103913113A (en) * | 2014-04-18 | 2014-07-09 | 芜湖新联造船有限公司 | Device and method for measuring centering deflection of main engine base |
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| US5096384A (en) * | 1990-07-27 | 1992-03-17 | The Marley Cooling Tower Company | Plastic fan blade for industrial cooling towers and method of making same |
| CN103913113A (en) * | 2014-04-18 | 2014-07-09 | 芜湖新联造船有限公司 | Device and method for measuring centering deflection of main engine base |
| CN206399618U (en) * | 2016-12-22 | 2017-08-11 | 沪东中华造船(集团)有限公司 | Torsion resistance measurement apparatus for large gearbox pedestal |
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