CN114838642B - Refrigerating compressor crankshaft detection equipment and detection method - Google Patents
Refrigerating compressor crankshaft detection equipment and detection method Download PDFInfo
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- CN114838642B CN114838642B CN202210719011.XA CN202210719011A CN114838642B CN 114838642 B CN114838642 B CN 114838642B CN 202210719011 A CN202210719011 A CN 202210719011A CN 114838642 B CN114838642 B CN 114838642B
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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
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Abstract
The invention discloses a refrigeration compressor crankshaft detection device and a detection method; the detection equipment comprises a motor, a crankshaft fixing device, a rotary supporting device, a transmission connecting rod device, a load simulation device, a moving platform, a crankshaft and a circle jump detection device; the motor is fixed with the bottom end of the crankshaft through the crankshaft fixing device, the initial vibration intensity is set in the middle of the crankshaft through the rotary supporting device, the top end of the crankshaft drives the load simulation device to operate through the transmission connecting rod device, the circle jump detection device is used for detecting the circle jump of each position of the crankshaft under the load state, and the test results of two stations on the mobile platform are compared to obtain the test results. According to the invention, the crankshaft fixing device and the rotary supporting device enable the axis of the crankshaft to be collinear with the transmission shaft of the motor, crankshafts of different types can be tested by utilizing the sliding rail, the initial vibration intensity of the crankshaft is set by the rotary supporting device, the load of the crankshaft is changed by the load simulation device, the real operation environment of the crankshaft is restored to a great extent, and the authenticity of a test result is improved.
Description
Technical Field
The invention relates to the technical field of engineering measurement, in particular to a refrigeration compressor crankshaft detection device and a detection method.
Background
In the transmission device of the refrigeration compressor, a crankshaft is one of the most important parts, and the shape and the structure of the crankshaft are complex, so that a processed finished product usually has larger radial runout, thereby causing deflection deformation. To ensure the performance of the crankshaft, it is necessary to perform a straightening operation. The measurement of the circular motion value is an important link in the straightening operation process, and the radial runout of the crankshaft is measured by using a crankshaft main journal runout measuring table. However, in the prior art, only radial runout values can be obtained, and the true circle runout value of the crankshaft under the condition of load cannot be accurately simulated. Therefore, there is a need for a new design of a refrigeration compressor crankshaft sensing device that can set the load size and measure the round trip value at each location.
In the related art, chinese patent application publication No. CN101793603B, a device for detecting remaining fatigue life and dimensional accuracy of an automobile retired crankshaft in the technical field of automobile engineering, comprising: the device comprises a frame, a driving motor, a headstock, a driving gear, a crankshaft, a tailstock, a lead screw, a support and a stepping motor, wherein the driving motor is arranged on the frame, the driving gear is arranged on the driving motor and connected with the crankshaft, the crankshaft is respectively connected with the headstock and the tailstock, the stepping motor is arranged on the frame, the lead screw is connected with the stepping motor, the support is arranged on the lead screw, and the device further comprises a probe clamp which is respectively connected with the support and the crankshaft. According to the invention, through adopting a rocker mechanism design, the magnetic flux leakage detection can be carried out on the main journal and the connecting rod journal of the crankshaft without adjusting the axes of all journals of the crankshaft, and the residual fatigue life of the part is estimated. The device can also detect the dimensional accuracy and shape error of the crankshaft, and provides a basis for selecting a proper remanufacturing process flow. The safety of remanufactured crankshafts can be improved, and the rejection rate is reduced. The related art has the following disadvantages: the crankshafts with different lengths cannot be measured, only the crankshafts without external load can be detected, the abrasion of the crankshafts in the operation state cannot be simulated, and only a single crankshaft can be detected. Accordingly, it is desirable to provide a refrigeration compressor crankshaft inspection apparatus and inspection method that address the above-described issues.
Disclosure of Invention
The invention aims to provide a refrigeration compressor crankshaft detection device and a detection method, wherein a load simulator is used for setting an external load on a crankshaft, and vibration of the worn crankshaft is simulated by a rotary supporting device, so that the circle jump value of each position of the crankshaft in an operating state is accurately detected.
In order to achieve the above purpose, the invention provides a refrigeration compressor crankshaft detection device, which comprises a motor and a circle jump detection device which are arranged above a moving platform, and a crankshaft fixing device which is arranged on a motor transmission shaft, wherein the bottom of the moving platform is fixed on the ground, an operation platform at the top changes the horizontal position of the motor through a base sliding rail and a base sliding block, one end of the crankshaft fixing device is arranged on the transmission shaft of the motor through a coupling, the other end of the crankshaft fixing device is fixed at the bottom end of the crankshaft through a V-shaped holding clamp, and the circle jump detection device can change the horizontal position through the platform sliding rail and the platform sliding block. The rotary support device is characterized by further comprising a rotary support device which is clamped in the middle of the crankshaft, the load simulation device is connected with the top end of the crankshaft through a transmission connecting rod device, the bottom end of the rotary support device is mounted on an operation platform through a platform sliding rail and a platform sliding block, the middle of the crankshaft is fixed through the mutual cooperation of a concave ring buckle and a convex ring buckle, one end of the transmission connecting rod device is mounted on a load transmission shaft, and the other end of the transmission connecting rod device is fixed at the top end of the crankshaft. The motor is used for fixing the bottom end of the crankshaft through the crankshaft fixing device, the initial vibration intensity of the crankshaft is set at the middle part of the crankshaft through the rotary supporting device, the top end of the crankshaft drives the load simulation device to operate through the transmission connecting rod device, and the circle jump detection device is used for detecting the circle jump of each position of the crankshaft under the load state. The invention relates to a refrigeration compressor crankshaft detection device which mainly comprises a first telescopic ladder, a lifting platform and a second telescopic ladder.
The crankshaft fixing device comprises a first chute, the bottom of which is fixed on a motor through a coupler, the first chute is rectangular in outline, a trapezoid groove is formed in the top of the first chute, a fixed ring is arranged in the middle of the trapezoid groove, a first bidirectional bolt penetrates through the fixed ring, two circular baffle plates are arranged in the middle of the first bidirectional bolt to clamp the fixed ring in the middle, the directions of threads at the left end and the right end of the circular baffle plates are opposite, the lengths of the threads are equal, and hexagonal nuts are arranged at the two ends of the circular baffle plates. The novel sliding block is characterized by further comprising a first trapezoidal sliding block arranged on the first sliding groove, wherein the first trapezoidal sliding block is trapezoidal, a threaded hole capable of penetrating through the first bidirectional bolt is formed in the center of the first trapezoidal sliding block, a V-shaped holding clamp is arranged at the top of the first trapezoidal sliding block, and the V-shaped holding clamp can move along the first sliding groove along with rotation of the first bidirectional bolt to realize opening and closing.
The two V-shaped clamping openings of the V-shaped holding clamp are opposite, the axes at the bottom ends of different crankshafts can be always kept at the same position during clamping, and anti-slip clamping teeth are arranged in the clamping openings, so that the rotating crankshafts can be prevented from sliding.
The rotary supporting device comprises a second chute fixed on the platform slide block, the second chute has the same structure as the first chute, and is matched with the second bidirectional bolt and the second trapezoidal slide block to realize the opening and closing of the second trapezoidal slide block. The novel crankshaft rotary machine is characterized by further comprising a concave ring buckle and a convex ring buckle which are fixed above the sliding block II, wherein the concave ring buckle is concave in overlooking, a front surface is provided with a round through hole penetrating through the front and rear surfaces, the convex ring buckle is convex in overlooking, the front surface is provided with a round through hole penetrating through the front and rear surfaces, the concave ring buckle is in concave-convex fit with the convex ring buckle, the through holes can be completely overlapped and penetrate through a crankshaft, a C-shaped clamping sleeve is arranged in the overlapped through hole, a rotary bearing is arranged in the C-shaped clamping sleeve, and the crankshaft is rotatably supported in the rotary bearing.
The concave ring buckle and the convex ring buckle move along the opposite direction along with the rotation of the second bidirectional bolt, the overlapping area of the circular through holes is gradually reduced, the C-shaped clamping sleeve clamps the rotary bearing, meanwhile, the second sliding chute can horizontally move along the sliding rail of the platform through the sliding block of the platform, and the supporting point of the crankshaft is changed.
The transmission connecting rod device comprises a transmission connecting rod, the lower end of the transmission connecting rod is arranged on the load transmission shaft, an opening is formed in the lower end of the transmission connecting rod, the first long bolt penetrates through the gasket to hinge the lower end of the transmission connecting rod with the load transmission shaft, and the second long bolt penetrates through the second gasket to hinge the upper end of the transmission connecting rod with the fixed sleeve. The fixed sleeve is internally provided with holes, the lower semicircle of the through hole is provided with serrated anti-slip teeth, the top and the left side and the right side are respectively provided with a threaded hole along the radial direction, a section of cylindrical nut is extended out of the outer ring of the fixed sleeve, three anti-slip bolts are respectively arranged on the cylindrical nut, and the top end of the crankshaft is clamped by rotating the anti-slip bolts.
The load simulator comprises a load-bearing shell fixed on the ground, wherein the load-bearing shell is of a box-shaped structure with an opening on the top surface and a side surface supported on the ground, the bottom surface of the load-bearing shell is provided with a circular large opening capable of penetrating through a pressure valve, a pressure indicating ruler is hinged to one side of the circular large opening in the horizontal direction, a side cover is arranged on the opening of the top surface, and a capsule-shaped opening capable of penetrating through a load transmission shaft is arranged in the center of the side cover. The device is characterized by further comprising an upper sealing pressure mortar arranged on the inner side of the top surface of the bearing shell and a lower sealing pressure mortar arranged on the inner side of the bottom surface, wherein the openings of the upper sealing pressure mortar and the lower sealing pressure mortar are opposite and communicated with the upper liquid chamber and the lower liquid chamber through a communication piston, a plurality of air holes are formed in the periphery of the opening, the outer sides of two plugs of the communication piston are liquid chambers, the inner side of the communication piston is an air chamber, a row of through holes for communicating the upper liquid chamber and the lower liquid chamber are formed in the communication piston, a load transmission shaft is arranged on one side of the middle part, a pressure valve is arranged on the opposite side of the load transmission shaft, and the pressure valve is inserted into the communication piston to control the quantity of the through holes.
The mobile platform comprises a power distribution cabinet at the bottom, four base sliding rails are transversely arranged above the power distribution cabinet, the operation platform is installed on the base sliding rails through a plurality of base sliding blocks in the middle, four platform sliding rails for installing a rotary supporting device and two circular jump detecting devices are arranged on one side, opposite to the motors, of the upper side of the operation platform, two groups of motors, a crankshaft fixing device, the rotary supporting device, the circular jump detecting devices and two sets of transmission connecting rod devices and load simulating devices are respectively arranged above the mobile platform, a group of reference groups with the same environmental influence can be arranged, and two groups of experiments are simultaneously carried out.
The round trip detection device comprises a support rod arranged on a platform sliding block, a fixed pipe fixed at the top of the support rod, an anti-slip screw is arranged in the middle of the top of the fixed pipe, holes on two sides penetrate through a measuring rod, a measuring end of the measuring rod is in a pointed shape, and a dial indicator is arranged between the measuring end and the fixed pipe.
The detection method of the refrigerating compressor crankshaft comprises the following steps:
and a, respectively installing the crankshafts into a rotating bearing at a main station and a contrast station, tightening a crankshaft fixing device to fix the bottom end of the crankshaft, moving an operation platform to put the top end of the crankshaft into a fixed sleeve, and screwing up an anti-skid bolt.
And b, tightening the rotary supporting device to enable the C-shaped clamping sleeve to clamp the rotary bearing to adjust the position of the rotary supporting device to enable the supporting points of the two groups of crankshafts to be the same, adjusting the position of the circle jump detecting device to enable the measuring rod to point to the target position, adjusting the extending length of the measuring rod, enabling the measuring end to just contact with the target position, and screwing the anti-skid screw.
And c, referring to the actual situation, controlling the extension length of the pressure valve according to the pressure indicator to set initial external load, setting the revolution of the crankshaft through the motor, reading the circle jump value of the crankshaft through the dial indicator, stopping the experiment when the circle jump value exceeds the target value, and determining the limit external load value after the part is qualified and the external load is continuously increased when the circle jump value is lower than the target value.
The step c further comprises calculating a target value in such a way that the deflection deformation of the crankshaft (7) is:
；
wherein, the liquid crystal display device comprises a liquid crystal display device,Pfor the value of the external load,lfor the total length of the crankshaft,dfor the length from the bottom end of the crankshaft to the supporting point,Eis the elastic modulus of the crankshaft,Iis the moment of inertia of the crankshaft.
Compared with the related art, the invention has the following beneficial effects:
(1) The crankshaft fixing device always keeps the axes of crankshafts with different diameters on the same straight line with the axes of the transmission shaft through the V-shaped holding clamp, and vibration caused by different axes when the motor drives the crankshafts to rotate can be effectively avoided.
(2) The sliding grooves of the crankshaft fixing device and the rotary supporting device realize synchronous movement of the sliding blocks through the bidirectional bolts, so that horizontal position deviation generated when the crankshaft is fixed to rotate is effectively avoided.
(3) The rotary supporting device is matched with the concave ring buckle and the convex ring buckle, and the center of the crankshaft is always kept at the middle point of the centers of the two ring buckles by utilizing the circular arcs tightened on the two sides, so that the center of the crankshaft supporting position is kept in the same straight line with the motor transmission shaft, and the vertical position deviation generated when the crankshaft is fixed is effectively avoided.
(4) The c-shaped clamping sleeve can set vibration intensity through the concave ring buckle and the convex ring buckle, and when the crankshaft rotates, the abrasion of the c-shaped clamping sleeve can replace the abrasion of the crankshaft, so that the vibration of the crankshaft is simulated. The operation environment of the crankshaft is more truly simulated.
(5) The load simulation device simulates the working load of the piston pump through the arranged container filled with liquid, and the resistance of the liquid passing through the piston is changed by adjusting the size of the through hole on the piston, so that the setting of different working loads in the process of adjusting and testing the crankshaft is realized. The authenticity and the reliability of the detection data are improved.
The appearance of the crankshaft detection equipment and the detection method of the refrigeration compressor enriches the types of the existing crankshaft detection equipment and provides a new method for detecting the crankshaft. The efficiency of crankshaft detection is effectively improved, the real working environment of the crankshaft is restored, and the real reliability of data is improved.
Drawings
FIG. 1 is a three-dimensional schematic of the present invention;
FIG. 2 is a three-dimensional schematic view of a crankshaft securing apparatus of the present invention;
FIG. 3 is a three-dimensional schematic view of a rotary support device of the present invention;
FIG. 4 is a front view of the rotary support device of the present invention;
FIG. 5 is a three-dimensional schematic view of a drive linkage of the present invention;
FIG. 6 is a three-dimensional schematic diagram of a load simulator of the present invention;
FIG. 7 is a partial cutaway view of a load simulator of the invention;
FIG. 8 is a three-dimensional schematic of a mobile platform of the present invention;
FIG. 9 is a three-dimensional schematic diagram of a circle-jump detection apparatus of the present invention;
the figures are labeled as follows:
the device comprises a 1-motor, a 2-crankshaft fixing device, a 3-rotating supporting device, a 4-transmission connecting rod device, a 5-load simulation device, a 6-moving platform, a 7-crankshaft, an 8-round trip detection device, a 21-sliding chute I, a 22-fixed circular ring, a 23-trapezoidal sliding block I, a 24-bidirectional bolt I, a 25-V-shaped clamping clamp, a 26-round baffle, a 27-coupling, a 31-concave ring buckle, a 32-convex ring buckle, a 33-C-shaped clamping sleeve, a 34-rotating bearing, a 35-sliding chute II, a 36-bidirectional bolt II, a 37-trapezoidal sliding block II, a 41-anti-skid bolt, a 42-fixed sleeve, a 43-gasket II, a 44-long bolt II, a 45-transmission connecting rod, a 46-gasket I, a 47-long bolt I, a 48-cylindrical nut, a 51-bearing housing, a 52-side cover, a 53-load transmission shaft, a 54-pressure indicating rule, a 55-pressure valve, a 56-upper sealing pressure mortar, a 57-communicating piston, a 58-air hole, a 59-lower sealing pressure, a 510-liquid chamber, a 511-air chamber, a 61-distribution cabinet, a 62-base, a 62-distribution cabinet, a 62-64-sliding rail, a 64-sliding platform, a 65-sliding rail, a 65-sliding platform, a 65-sliding rails, a 65-and a 65-sliding platform, a 65-and a slide-type slide table, a 65-and a fixed platform.
Description of the embodiments
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
As shown in fig. 1, the crankshaft detection device of the refrigeration compressor provided by the invention comprises a motor 1 and a circle jump detection device 8 which are arranged above a moving platform 6, and a crankshaft fixing device 2 which is arranged on a transmission shaft of the motor 1, wherein the bottom of the moving platform 6 is fixed on the ground, a working platform 63 at the top of the moving platform is used for changing the horizontal position of the motor 1 through a base sliding rail 62 and a base sliding block 64, one end of the crankshaft fixing device 2 is arranged on the transmission shaft of the motor 1 through a coupling 27, the other end of the crankshaft fixing device is used for fixing the bottom end of a crankshaft 7 through a V-shaped holding clamp 25, and the circle jump detection device 8 can be used for changing the horizontal position through a platform sliding rail 65 and a platform sliding block 66. The rotary support device 3 is clamped in the middle of the crankshaft 7, the load simulation device 5 is connected with the top end of the crankshaft 7 through the transmission connecting rod device 4, the bottom end of the rotary support device 3 is installed on the working platform 63 through the platform sliding rail 65 and the platform sliding block 66, the middle of the crankshaft 7 is fixed through the mutual matching of the concave ring buckle 31 and the convex ring buckle 32, one end of the transmission connecting rod device 4 is installed on the load transmission shaft 53, and the other end of the transmission connecting rod device is fixed on the top end of the crankshaft 7. The motor 1 is characterized in that the bottom end of a crankshaft 7 is fixed through a crankshaft fixing device 2, the initial vibration intensity of the crankshaft 7 is set at the middle part of the crankshaft through a rotary supporting device 3, the top end of the crankshaft 7 drives a load simulation device 5 to operate through a transmission connecting rod device 4, and a circle jump detection device 8 is used for detecting circle jumps at each position of the crankshaft 7 under a load state.
As shown in fig. 2, the bottom of the first chute 21 is fixed on the motor 1 through a coupling 27, the first chute 21 is rectangular in outline, a trapezoid groove is formed in the top of the first chute, a fixed ring 22 is arranged in the middle of the trapezoid groove, a first bidirectional bolt 24 penetrates through the fixed ring 22, two circular baffle plates 26 are arranged in the middle of the first bidirectional bolt 24 to clamp the fixed ring 22, the threads of the left end and the right end of the circular baffle plates 26 are opposite in direction and equal in length, and hexagonal nuts are arranged at the two ends of the circular baffle plates. The first trapezoid slide block 23 is arranged on the first chute 21, the first trapezoid slide block 23 is trapezoid, a threaded hole capable of penetrating through the first bidirectional bolt 24 is formed in the center of the first trapezoid slide block, a V-shaped holding clamp 25 is arranged at the top of the first trapezoid slide block, and the V-shaped holding clamp 25 can move along the first chute 21 along with rotation of the first bidirectional bolt 24 to achieve opening and closing.
As shown in fig. 3-4, the second chute 35 is fixed on the platform slide block 66, and the second chute 35 has the same structure as the first chute 21 and is matched with the second bidirectional bolt 36 and the second trapezoid slide block 37 to realize the opening and closing of the second trapezoid slide block 37. The concave ring buckle 31 and the convex ring buckle 32 are fixed above the sliding block II 37, the concave ring buckle 31 is concave in overlooking, the front surface is provided with a round through hole penetrating front and back, the convex ring buckle 32 is convex in overlooking, the front surface is provided with a round through hole penetrating front and back, the concave ring buckle 31 and the convex ring buckle 32 are in concave-convex fit, the through holes can be completely overlapped and penetrate through the crankshaft 7, the inner ring of the overlapped through hole is provided with a C-shaped clamping sleeve 33, the inner ring of the C-shaped clamping sleeve 33 is provided with a rotating bearing 34, and the crankshaft 7 is rotatably supported in the rotating bearing 34. The concave ring buckle 31 and the convex ring buckle 32 move along the opposite direction along with the rotation of the two-way bolt 36, the overlapping area of the circular through holes is gradually reduced, the C-shaped clamping sleeve 33 is clamped, the C-shaped clamping sleeve 33 clamps the rotary bearing 34, the second sliding chute 35 can horizontally move along the platform sliding rail 65 through the platform sliding block 66, and the supporting point of the crankshaft 7 is changed.
As shown in fig. 5, the lower end of the transmission link 45 is mounted on the load transmission shaft 53, the lower end of the transmission link 45 is provided with an opening, the first long bolt 47 passes through the first gasket 46 and articulates the lower end of the transmission link 45 with the load transmission shaft 53, and the second long bolt 44 passes through the second gasket 43 and articulates the upper end of the transmission link 45 with the fixed sleeve 42. The inside trompil of fixed bolster 42, the semicircle is equipped with zigzag antiskid tooth under the through-hole, and top and left and right sides are equipped with a screw hole respectively along radial and extend a section cylindrical nut 48 by fixed bolster 42 outer lane, and three antiskid bolt 41 install respectively in cylindrical nut (48), press from both sides tight with bent axle 7 top through rotatory antiskid bolt 41.
As shown in fig. 6-7, the bearing housing 51 is fixed on the ground, the top surface of the bearing housing 51 has an opening, the side surface is supported on the ground, the bottom surface of the bearing housing 51 is provided with a circular large opening through which the pressure valve 55 can pass, the pressure indicator 54 is hinged to one side of the circular large opening in the horizontal direction, the top surface opening is provided with a side cover 52, and the center of the side cover 52 is provided with a capsule-shaped opening through which the load transmission shaft 53 can pass. The upper sealing pressure mortar 56 is arranged on the inner side of the top surface of the bearing shell 51, the lower sealing pressure mortar 59 is arranged on the inner side of the bottom surface, the openings of the upper sealing pressure mortar 56 and the lower sealing pressure mortar 59 are opposite and communicated with the upper liquid chamber 510 and the lower liquid chamber 510 through the communicating piston 57, a plurality of air holes 58 are formed in the periphery of the opening, the outer sides of two plugs of the communicating piston 57 are the liquid chambers 510, the inner side of the communicating piston 57 is the air chamber 511, a row of through holes for communicating the upper liquid chamber 510 and the lower liquid chamber 510 are formed in the communicating piston 57, a load transmission shaft 53 is arranged on one side of the middle part, a pressure valve 55 is arranged on the opposite side, and the pressure valve is inserted into the communicating piston 57 to control the quantity of the through holes.
As shown in fig. 8, the power distribution cabinet 61 is located at the bottom of the mobile platform 6, four base sliding rails 62 are transversely arranged above the power distribution cabinet 61, the operation platform 63 is installed on the base sliding rails 62 through a plurality of base sliding blocks 64 in the middle, four platform sliding rails 65 for installing the rotary supporting device 3 and two platform sliding rails for installing the round trip detecting device 8 are arranged on the side, opposite to the motor 1, of the operation platform 63, two groups of motors 1, a crankshaft fixing device 2, the rotary supporting device 3 and the round trip detecting device 8 are respectively arranged above the mobile platform 6, two groups of transmission connecting rod devices 4 and the load simulating device 5 are arranged, a group of reference groups with the same environmental influence can be arranged, and two groups of experiments are simultaneously carried out.
As shown in fig. 9, the supporting rod 67 is mounted on the platform sliding block 66, the fixing tube 610 is fixed on the top of the supporting rod 67, an anti-slip screw 611 is mounted in the middle of the top of the fixing tube 610, two side openings penetrate through the measuring rod 68, the measuring end of the measuring rod 68 is pointed, and the dial indicator 69 is mounted between the measuring end and the fixing tube 610.
In this embodiment, the crankshaft fixing device 2 keeps the axes of crankshafts 7 with different diameters on the same straight line with the axes of the transmission shaft all the time through the V-shaped holding clamp 25, so that vibration caused by different axes when the motor 1 drives the crankshafts 7 to rotate can be effectively avoided. The sliding grooves 21 and 35 of the crankshaft fixing device 2 and the rotary supporting device 3 realize synchronous movement of the trapezoidal sliding blocks 23 and 37 through the bidirectional bolts 24 and 36, so that horizontal position deviation generated when the crankshaft 7 rotates is effectively avoided. The rotary supporting device 3 uses the circular arcs tightened on two sides to always keep the axle center of the crankshaft 7 at the middle point of the circle centers of the two rings through the mutual matching of the concave ring buckle 31 and the convex ring buckle 32, so that the axle center of the supporting position of the crankshaft 7 is kept in the same straight line with the transmission shaft of the motor 1, and the vertical position deviation generated when the crankshaft 7 is fixed is effectively avoided. The c-shaped clamping sleeve 33 can set vibration intensity through the concave ring buckle 31 and the convex ring buckle 32, and when the crankshaft 7 rotates, the abrasion of the c-shaped clamping sleeve 33 can replace the abrasion of the crankshaft 7, so that the vibration of the crankshaft 7 is simulated. The operation environment of the crankshaft 7 is more truly simulated. The load simulation device 5 simulates the working load of the piston pump through the arranged container filled with liquid, and the resistance of the liquid passing through the communication piston 57 is changed by adjusting the size of the through hole on the communication piston 57, so that the setting of different working loads in the process of adjusting and testing the crankshaft 7 is realized. The authenticity and the reliability of the detection data are improved.
The detection method of the refrigeration compressor crankshaft detection equipment comprises the following steps:
step a, respectively installing the crankshaft 7 into the rotary bearing 34 at the main station and the contrast station, tightening the crankshaft fixing device 2 to fix the bottom end of the crankshaft 7, moving the operation platform 63 to put the top end of the crankshaft 7 into the fixed sleeve 42, and tightening the anti-skid bolt 41;
step b, tightening the rotary supporting device 3 to enable the C-shaped clamping sleeve 33 to clamp and adjust the positions of the rotary supporting device 3 by the rotary bearings 34 to enable the supporting points of the two groups of crankshafts 7 to be the same, adjusting the positions of the circle jump detecting device 8 to enable the measuring rod 68 to point to the target position, adjusting the extension length of the measuring rod 68, enabling the measuring end to be just contacted with the target position, and screwing the anti-skid screw 611;
and c, referring to the actual situation, controlling the extension length of the pressure valve 55 according to the pressure indicator 54 to set initial external load, setting the revolution of the crankshaft 7 through the motor 1, reading the circle jump value of the crankshaft 7 through the dial indicator 69, stopping the experiment when the circle jump value exceeds a target value, and determining the limit external load value if the circle jump value is lower than the target value and the parts are qualified and continue to increase the external load.
The step c further includes calculating a target value in such a manner that the deflection deformation amount of the crankshaft 7:
；
wherein, the liquid crystal display device comprises a liquid crystal display device,Pfor the value of the external load,lfor the total length of the crankshaft,dfor the length from the bottom end of the crankshaft to the supporting point,Eis the elastic modulus of the crankshaft,Iis the moment of inertia of the crankshaft.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the invention.
Claims (10)
1. The utility model provides a refrigeration compressor bent axle check out test set, includes rotation strutting arrangement (3), transmission connecting rod device (4), load simulator (5) and moving platform (6), its characterized in that:
the device comprises a motor (1) arranged above a moving platform (6), a circle jump detection device (8), a crankshaft fixing device (2) arranged on a transmission shaft of the motor (1), wherein the bottom of the moving platform (6) is fixed on the ground, an operation platform (63) at the top changes the horizontal position of the motor (1) through a base sliding rail (62) and a base sliding block (64), one end of the crankshaft fixing device (2) is arranged on the transmission shaft of the motor (1) through a coupling (27), the other end of the crankshaft fixing device is fixed at the bottom end of a crankshaft (7) through a V-shaped holding clamp (25), and the circle jump detection device (8) can change the horizontal position through a platform sliding rail (65) and a platform sliding block (66);
the device also comprises a rotary supporting device (3) which is clamped in the middle of the crankshaft (7), a load simulation device (5) is connected with the top end of the crankshaft (7) through a transmission connecting rod device (4), the bottom end of the rotary supporting device (3) is arranged on an operation platform (63) through a platform sliding rail (65) and a platform sliding block (66), the middle of the crankshaft (7) is fixed through the mutual matching of a concave ring buckle (31) and a convex ring buckle (32), one end of the transmission connecting rod device (4) is arranged on a load transmission shaft (53), and the other end of the transmission connecting rod device is fixed on the top end of the crankshaft (7);
the motor (1) is used for fixing the bottom end of the crankshaft (7) through the crankshaft fixing device (2), the initial vibration intensity of the crankshaft (7) is set at the middle part of the crankshaft through the rotary supporting device (3), the top end of the crankshaft (7) drives the load simulation device (5) to operate through the transmission connecting rod device (4), and the circle jump detection device (8) is used for detecting the circle jump of each position of the crankshaft (7) under the load state.
2. The refrigerant compressor crankshaft detection device as set forth in claim 1, wherein:
the crankshaft fixing device (2) comprises a first chute (21) with the bottom fixed on the motor (1) through a coupler (27), wherein the first chute (21) is rectangular in outline, a trapezoid groove is formed in the top inwards, a fixing circular ring (22) is arranged in the middle of the trapezoid groove, a two-way bolt I (24) penetrates through the fixing circular ring (22), two circular baffle plates (26) are arranged in the middle of the two-way bolt I (24) to clamp the fixing circular ring (22) in the middle, the threads at the left end and the right end of the circular baffle plates (26) are opposite in direction and equal in length, and hexagonal nuts are arranged at the two ends;
the novel sliding block is characterized by further comprising a first trapezoidal sliding block (23) arranged on the first sliding groove (21), a threaded hole capable of penetrating through the first bidirectional bolt (24) is formed in the center of the first trapezoidal sliding block (23), a V-shaped holding clamp (25) is arranged at the top of the first trapezoidal sliding block, and the V-shaped holding clamp (25) can move along the first sliding groove (21) along with the rotation of the first bidirectional bolt (24) to realize opening and closing.
3. The refrigerant compressor crankshaft detection device as set forth in claim 2, wherein:
the rotary supporting device (3) comprises a second chute (35) fixed on a platform sliding block (66), the second chute (35) has the same structure as the first chute (21), and is matched with a second bidirectional bolt (36) and a second trapezoid sliding block (37) to realize opening and closing of the second trapezoid sliding block (37);
the novel crank is characterized by further comprising a concave ring buckle (31) and a convex ring buckle (32) which are fixed above the sliding block II (37), wherein the concave ring buckle (31) is concave in overlooking mode, a round through hole penetrating through the front and the rear is formed in the front, the convex ring buckle (32) is convex in overlooking mode, a round through hole penetrating through the front and the rear is formed in the front, the concave ring buckle (31) and the convex ring buckle (32) are in concave-convex fit, the through holes can be completely overlapped and penetrate through the crank shaft (7), a C-shaped clamping sleeve (33) is arranged in the overlapped through hole, a rotating bearing (34) is arranged in the C-shaped clamping sleeve (33) in a surrounding mode, and the crank shaft (7) is rotatably supported in the rotating bearing (34).
4. A refrigerant compressor crankshaft detection device as recited in claim 3, wherein:
the concave ring buckle (31) and the convex ring buckle (32) move along the opposite direction along with the rotation of the two-way bolt II (36), the overlapping area of the circular through holes is gradually reduced, the C-shaped clamping sleeve (33) is clamped, the C-shaped clamping sleeve (33) clamps the rotary bearing (34), the sliding groove II (35) can horizontally move along the platform sliding rail (65) through the platform sliding block (66), and the supporting point of the crankshaft (7) is changed.
5. The refrigerant compressor crankshaft detection device as set forth in claim 4, wherein:
the transmission connecting rod device (4) comprises a transmission connecting rod (45) with the lower end arranged on a load transmission shaft (53),
the lower end of the transmission connecting rod (45) is provided with an opening, the long bolt I (47) penetrates through the gasket I (46) and articulates the lower end of the transmission connecting rod (45) with the load transmission shaft (53), and the long bolt II (44) penetrates through the gasket II (43) and articulates the upper end of the transmission connecting rod (45) with the fixed sleeve (42);
the inner part of the fixed sleeve (42) is provided with a hole, the lower semicircle of the through hole is provided with serrated anti-slip teeth, the top and the left side and the right side are respectively provided with a threaded hole along the radial direction, a section of cylindrical nut (48) extends out of the outer ring of the fixed sleeve (42), three anti-slip bolts (41) are respectively arranged on the cylindrical nut (48), and the top end of the crankshaft (7) is clamped by rotating the anti-slip bolts (41).
6. The refrigerant compressor crankshaft detection device as set forth in claim 5, wherein:
the load simulation device (5) comprises a bearing shell (51) fixed on the ground, wherein the bearing shell (51) is of a box-shaped structure with an opening on the top surface and a side surface supported on the ground, the bottom surface of the bearing shell (51) is provided with a circular large opening capable of penetrating through a pressure valve (55), a pressure indicator ruler (54) is hinged to one side of the circular large opening in the horizontal direction, the opening on the top surface is provided with a side cover (52), and the center of the side cover (52) is provided with a capsule-shaped opening capable of penetrating through a load transmission shaft (53);
the device is characterized by further comprising an upper sealing pressure mortar (56) arranged on the inner side of the top surface of the bearing shell (51) and a lower sealing pressure mortar (59) arranged on the inner side of the bottom surface, wherein the openings of the upper sealing pressure mortar (56) and the lower sealing pressure mortar (59) are opposite and are communicated with an upper liquid chamber (510) and a lower liquid chamber (510) through a communication piston (57), a plurality of air holes (58) are formed in the periphery of the opening, the liquid chambers (510) are arranged on the outer sides of two plugs of the communication piston (57), an air chamber (511) is arranged on the inner side of the communication piston (57), a row of through holes for communicating the upper liquid chamber (510) and the lower liquid chamber (510) are formed in the communication piston (57), a load transmission shaft (53) is arranged on one side of the middle part, and a pressure valve (55) is arranged on the opposite side of the communication piston, and is inserted into the communication piston (57) to control the quantity of the through holes.
7. The refrigerant compressor crankshaft detection device as set forth in claim 6, wherein:
the utility model provides a mobile platform (6) including switch board (61) of bottom, four transversely set up in base slide rail (62) of switch board (61) top, work platform (63) are installed in base slide rail (62) through a plurality of base sliders (64) at middle part, work platform (63) top and the opposite one side of motor (1) are equipped with four and are used for installing rotatory strutting arrangement (3) and two platform slide rails (65) that are used for installing circle to jump detection device (8), mobile platform (6) top be equipped with two sets of motors (1), bent axle fixing device (2), rotatory strutting arrangement (3), circle to jump detection device (8) respectively, mobile platform (6) be furnished with two sets of transmission connecting rod device (4) and load simulator (5), can set up a set of environmental impact the same reference group, carry out two sets of experiments simultaneously.
8. The refrigerant compressor crankshaft detection device as set forth in claim 7, wherein:
the round trip detection device (8) comprises a support rod (67) arranged on a platform sliding block (66), a fixed pipe (610) fixed at the top of the support rod (67), an anti-slip screw (611) is arranged in the middle of the top of the fixed pipe (610), two side holes penetrate through a measuring rod (68), a measuring end of the measuring rod (68) is sharp, and a dial indicator (69) is arranged between the measuring end and the fixed pipe (610).
9. A method for detecting a crankshaft of a refrigeration compressor using the refrigeration compressor crankshaft detection apparatus according to any one of claims 1 to 8, characterized in that: comprises the steps of,
step a, respectively installing a crankshaft (7) into a rotary bearing (34) at a main station and a comparison station, tightening a crankshaft fixing device (2) to fix the bottom end of the crankshaft (7), moving a working platform (63) to put the top end of the crankshaft (7) into a fixed sleeve (42), and screwing an anti-skid bolt (41);
step b, tightening the rotary supporting device (3), enabling the C-shaped clamping sleeve (33) to clamp and adjust the rotary bearing (34) to the position of the rotary supporting device (3) to enable the supporting points of the two groups of crankshafts (7) to be the same, adjusting the position of the circle jump detecting device (8), enabling the measuring rod (68) to point to the target position, adjusting the extension length of the measuring rod (68), enabling the measuring end to just contact with the target position, and screwing the anti-skid screw (611);
and c, referring to the actual situation, controlling the extension length of the pressure valve (55) according to the pressure indicator (54) to set initial external load, setting the revolution of the crankshaft (7) through the motor (1), reading the circle jump value of the crankshaft (7) through the dial indicator (69), stopping the experiment when the circle jump value exceeds a target value, and determining the limit external load value if the circle jump value is lower than the target value, and if the part is qualified and continues to increase the external load.
10. The method for detecting a crankshaft of a refrigeration compressor as recited in claim 9, wherein:
the step c further comprises calculating a target value in such a way that the deflection deformation of the crankshaft (7) is:
；
wherein P is an external load value, l is the total length of the crankshaft, d is the length from the bottom end of the crankshaft to the supporting point, E is the elastic modulus of the crankshaft, and I is the moment of inertia of the crankshaft.
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| CN116123065B (en) * | 2022-12-15 | 2023-07-07 | 烟台日冷机电科技有限公司 | Belt pulley air compressor machine detects platform |
| CN117969069A (en) * | 2024-02-29 | 2024-05-03 | 淮安市新盛压缩机配件有限公司 | Compressor connecting rod fatigue strength detection device |
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