CN115354713B - Self-lubricating metal spring coupling applicable to various working conditions for hydraulic excavator - Google Patents
Self-lubricating metal spring coupling applicable to various working conditions for hydraulic excavator Download PDFInfo
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- CN115354713B CN115354713B CN202211034711.1A CN202211034711A CN115354713B CN 115354713 B CN115354713 B CN 115354713B CN 202211034711 A CN202211034711 A CN 202211034711A CN 115354713 B CN115354713 B CN 115354713B
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- 238000010168 coupling process Methods 0.000 title claims abstract description 37
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 34
- 239000002184 metal Substances 0.000 title claims abstract description 34
- 238000013016 damping Methods 0.000 claims abstract description 75
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000001050 lubricating effect Effects 0.000 claims abstract description 15
- 239000004519 grease Substances 0.000 claims description 22
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical group [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 16
- 229910052750 molybdenum Inorganic materials 0.000 claims description 16
- 239000011733 molybdenum Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 5
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- 230000005284 excitation Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
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- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
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- 230000005855 radiation Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2025—Particular purposes of control systems not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
A self-lubricating metal spring coupling suitable for various working conditions for a hydraulic excavator comprises a main pump driven hub, wherein a spring seat window is formed in the main pump driven hub; a damping spring assembly is arranged in the spring seat window; spring guide discs are arranged on two sides of the main pump driven hub, and damping spring guide windows are arranged on the spring guide discs; an intelligent friction damping system is arranged between the main pump driven hubs of the spring guide disc; the two sides of the flywheel driving disc are provided with a front oil cavity cover and a rear oil cavity cover, the flywheel driving disc is in sealing connection with the main pump driven wheel hub, and a lubricating medium is arranged in a sealing cavity of the coupler. According to the invention, the metal vibration reduction spring is adopted, so that the problem of rubber aging in a similar high-temperature environment is avoided, the performance of the coupler product is more stable and durable in the use process, and the coupler product is suitable for the working conditions of most hydraulic excavators.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a self-lubricating metal spring coupler which is used for a hydraulic excavator and can adapt to various working conditions.
Background
Torsional vibration phenomenon is common in the field of construction machinery and vehicles. Torsional vibration is extremely destructive, so that the fatigue damage of the shaft is increased by a light person, the service life is prolonged, and the damage or fracture of the shaft system of the unit can be caused by a heavy person. As internal combustion engine emissions are upgraded and power boost is increased, the risk of torsional vibration phenomena becomes more severe.
The problem of torsional vibration of the output end of the diesel engine for the hydraulic excavator at the present stage is mainly that a rubber high-elastic coupler is adopted. The coupling has the characteristics of high elasticity, strong vibration impact absorption capability and strong direction compensation capability. However, any rubber material is required to be aged and failed, and the excavator is often operated under high-temperature, high-dust and high-vibration environments due to very severe working conditions, so that the aging of the rubber is accelerated, and the coupling is failed in a quite large number of cases.
In the prior art, the torsional vibration strength is enhanced and the torsion angle is controlled within a moderate range by developing a composite material by using a novel process method. However, the elastomer is mainly made of rubber materials, and the aging failure problem is not avoided although the service life of the elastomer can be prolonged. And the coupler has only one system rigidity in the whole rotation speed range of 1100-1800 rpm of the excavator, and cannot adapt to the requirements of various working conditions of the hydraulic excavator.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the self-lubricating metal spring coupler which has a simple structure and good effect and is applicable to various working conditions for the hydraulic excavator.
The invention is realized by the following technical scheme: a self-lubricating metal spring coupling adaptable to various working conditions for a hydraulic excavator comprises a main pump driven hub connected with a main pump, wherein a plurality of spring seat windows are arranged on the main pump driven hub along the circumferential direction; a vibration reduction spring assembly is arranged in the spring seat window; the two sides of the main pump driven hub are respectively provided with a spring guide disc I and a spring guide disc II, vibration reduction spring guide windows are arranged on the spring guide disc I and the spring guide disc II, and the vibration reduction spring guide windows are provided with guide limiting structures; the spring guide disc II is arranged at one side close to the main pump, and an intelligent friction damping system is arranged between the spring guide disc II and the driven hub of the main pump; the outer periphery of the main pump driven hub is connected with a flywheel through a flywheel driving disc, a front oil cavity cover and a rear oil cavity cover are respectively arranged on two sides of the flywheel driving disc, the outer sides of the front oil cavity cover and the rear oil cavity cover are in sealing connection with the flywheel driving disc, and the inner sides of the front oil cavity cover and the rear oil cavity cover are in sealing connection with a main pump driven hub; the secondary hub of the main pump is connected with an inertia wheel at one side close to the main pump; the inside of the sealing cavity of the coupler is provided with a lubricating medium.
It is further: the main pump driven hub is made of forged steel, and is meshed with the external spline shaft of the main pump through the internal spline to transmit torque, and 6 grease passages leading to the internal spline are formed in the main pump driven hub.
The main pump driven hub is provided with 8 spring seat windows along the circumferential direction, and the outer side of each spring seat window is provided with a stress release opening.
The damping spring assembly comprises an outer damping spring and an inner damping spring which are sleeved together, and the lengths of the outer damping spring and the inner damping spring are different.
The outer damping spring is longer than the inner damping spring.
The inner side of the damping spring guide window is of a plane bending structure with a guide function, the outer side of the damping spring guide window is of a curved surface stamping structure with a limit function, and the inner side and the outer side of the damping spring guide window are both provided with pressure release openings.
The intelligent friction damping system comprises a friction plate, a pressure plate, a disc spring and a clamp spring II, wherein a limiting structure is arranged on the pressure plate, and a notch matched with the limiting structure for use is formed in a driven wheel hub of the main pump.
The front oil cavity cover and the rear oil cavity cover are of bowl-shaped stamping forming structures, two rows of radiating fins are welded on the outer sides of the front oil cavity cover and the rear oil cavity cover respectively, the front oil cavity cover and the rear oil cavity cover are connected with a flywheel driving disc in a sealing mode through a sealing gasket, a pressing gasket, a bolt I and a nut II, and the front oil cavity cover and the rear oil cavity cover are connected with a main pump driven wheel hub in a sealing mode through a V-shaped sealing ring and a clamp spring III.
The front oil cavity cover is provided with two threaded holes, and the threaded holes are connected with sealing plugs through taper threads.
The main pump driven hub seals the shaft end of the engine side through the clamp spring I and the oil seal, and the main pump driven hub clamp spring I and the shaft seal the main pump end.
The shaft seal includes a seal lip, a spring skeleton, and an outer lip.
The lubricating medium is molybdenum grease.
The flywheel is installed on the main pump driven hub through 3 hexagon socket head cap screws, 6 round holes are evenly formed in the position, close to the inner ring, of the flywheel, the outer ring of the flywheel is thickened, and the mass center of the flywheel moves to the outer ring.
The invention has the following advantages: according to the self-lubricating metal spring coupler applicable to the hydraulic excavator, the problem of rubber aging in a similar high-temperature environment is avoided by adopting the metal vibration reduction spring, so that the performance of a coupler product is more stable and durable in the use process, and the coupler is applicable to the working conditions of most hydraulic excavators; the intelligent damping system of the self-lubricating system is added to effectively protect abrasion and corrosion of the vibration damping spring; the lubrication and heat dissipation are realized through the self-energy without additionally adding a heat dissipation device; the number of parts of the coupler assembly is small, and the structure is simple and practical; compared with a high-elasticity rubber alloy coupler, the high-efficiency space design saves more than half of installation space; the parts are mainly of steel structure, the forming process is simple, and compared with the high-elastic synthetic rubber coupling, the cost is reduced by more than 30%.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a front view of the metal coupling of the present invention;
FIG. 3 is a schematic view of the internal structure of the metal coupling of the present invention;
FIG. 4 is a schematic view of a partially enlarged structure of FIG. 3;
FIG. 5 is a schematic view of the structure of the main pump driven hub of the present invention;
FIG. 6 is a front view of the main pump driven hub of the present invention;
FIG. 7 is a schematic view of the structure of the friction plate of the present invention;
FIG. 8 is a schematic view of the platen of the present invention;
FIG. 9 is a schematic view of the assembled construction of the present invention;
FIG. 10 is an enlarged schematic view of the partial structure of FIG. 9;
FIG. 11 is a campbell diagram of the present invention;
fig. 12 is a graph of the vibration torque versus excavator operating profile for the coupling of the present invention.
In the figure: 1. flywheel driving disc, 2, sealing gasket, 3, compression washer, 4, bolt I, 5, nut I, 6, front oil cavity cover, 7, spring guide I, 8, outer damping spring, 9, inner damping spring, 10, sealing plug, 11, jump ring I, 12, oil seal, 13, nut II, 14, spacer bush, 15, bolt II, 16, rear oil cavity cover, 17, spring guide II, 18, friction plate, 19, pressure plate, 20, disc spring, 21, jump ring II, 22, V-shaped sealing ring, 23, jump ring III, 24, inner hexagonal screw, 25, main pump driven hub, 26, shaft seal, 27, inertia wheel, 28, molybdenum grease, 30, spring seat window, 31, damping spring guide window.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are for illustration and explanation of the present invention, and are not intended to limit the present invention.
The self-lubricating metal spring coupling capable of adapting to various working conditions for the hydraulic excavator, as shown in fig. 1 to 12, comprises a main pump driven hub 25 connected with a main pump, wherein a plurality of spring seat windows 30 are arranged on the main pump driven hub 25 along the circumferential direction; a vibration damping spring assembly is arranged in the spring seat window 30; spring guide discs I7 and II 17 are respectively arranged on two sides of the main pump driven hub 25, damping spring guide windows 31 are arranged on the spring guide discs I7 and II 17, and the damping spring guide windows 31 are provided with guide limiting structures; the spring guide disc II 17 is arranged at one side close to the main pump, and an intelligent friction damping system is arranged between the spring guide disc II 17 and the main pump driven hub 25; the periphery of the main pump driven hub 25 is connected with a flywheel through a flywheel driving disc 1, a front oil cavity cover 6 and a rear oil cavity cover 16 are respectively arranged on two sides of the flywheel driving disc 1, the outer sides of the front oil cavity cover 6 and the rear oil cavity cover 16 are in sealing connection with the flywheel driving disc 1, and the inner sides of the front oil cavity cover 6 and the rear oil cavity cover 16 are in sealing connection with the main pump driven hub 25; the main pump driven hub 25 is connected with an inertia wheel 27 at one side close to the main pump; the inside of the sealing cavity of the coupler is provided with a lubricating medium. The self-lubricating metal spring coupler which can adapt to various working conditions for the hydraulic excavator is provided with a vibration reduction spring assembly, an intelligent friction damping system, a coupler sealing system and a self-lubricating system; the vibration damping spring assembly is arranged on a spring seat window on the main pump driven hub, the vibration damping spring assembly is provided with two-stage vibration damping springs, meanwhile, one side of the main pump driven hub is also connected with an inertia wheel, the two-stage springs are used for damping vibration and matching the inertia wheels on the driven side to form second-order rigidity, the resonance rotating speed of a coupling transmission system is changed, the working rigidity of the system is ensured, the resonance rotating speed is far away from the working rotating speed range of an engine, and the vibration damping spring assembly can adapt to main working conditions such as idling, digging, walking, crushing and the like of an excavator; the intelligent friction damping system is arranged between the spring guide disc II and the main pump driven hub, so that torsion peaks during starting and stopping of equipment and load transient are effectively reduced by adopting the intelligent friction damping system, a damping spring is protected, in addition, the friction damping is favorable for reducing the capacity of the structure for transmitting vibration, a certain vibration isolation effect is achieved, meanwhile, the sound radiation is also reduced, and a noise reduction effect is achieved; the coupling sealing system mainly refers to the sealing relation among the front oil cavity cover, the rear oil cavity cover, the flywheel driving disc and the main pump driven hub, and the sealing relation among the main pump driven hub, the engine and the main pump, so that external dust can be effectively prevented from entering, and the cleanliness in the sealing cavity is ensured; the self-lubricating system is arranged in the coupler sealing system, the service lives of the damping spring and the spline shaft sleeve are prolonged by more than one time by adding the closed self-lubricating system to the coupler and utilizing the characteristics of lubricating medium molybdenum grease, the lubrication of the transmission friction piece is realized under the condition of the dry flywheel shell of the engine, the problem of rust corrosion of metal parts of the coupler is solved, and the self-lubricating system is suitable for a dusty working environment; according to the invention, the metal spring is adopted for vibration reduction, so that the problem of rubber aging in a similar high-temperature environment is avoided, and the performance of the coupler product is more stable and durable in the use process; the coupler assembly has the advantages of small number of parts, simple structure and convenient disassembly and maintenance; compared with a high-elasticity rubber alloy coupler, the high-efficiency space design saves more than half of axial installation space; the parts are mainly of steel structures, the forming process is simple, compared with the high-elastic synthetic rubber coupling, the cost is reduced by more than 30%, the broadband vibration reduction protection output end can be realized, the resonance rotating speed of the system is far away from the excavator, the large torque can be transmitted to adapt to various working conditions such as idling, digging, walking and crushing of the excavator, and meanwhile the rubber aging problem commonly existing in the conventional high-elastic coupling can be avoided. The self-lubricating metal spring coupling which can adapt to various working conditions for the hydraulic excavator is shown in fig. 1 to 6, 8 spring seat windows 30 are arranged on the main pump driven hub 25 along the circumferential direction, and stress release openings are arranged on the outer sides of the spring seat windows 30. The inner side of the damping spring guide window 31 is a plane bending structure with a guide function, the outer side of the damping spring guide window 31 is a curved surface punching structure with a limit function, and the inner side and the outer side of the damping spring guide window 31 are both provided with pressure release openings. The main pump driven hub is provided with 8 spring seat windows, the outer side of each window is provided with a stress release opening F which is used as a vibration damping spring base together, and each window is internally provided with a pair of inner and outer vibration damping springs; the spring guide disc I and the spring guide disc II are made of high-strength alloy steel materials, 8 groups of vibration reduction spring guide windows are uniformly distributed in the middle circumferential direction through a stamping forming process, the spring guide windows correspond to the spring seat windows in position, the inner side of each group of spring guide windows is a plane bending structure and is attached to the middle main body part of the outer vibration reduction spring, the spring guide disc I and the spring guide disc II play a role in guiding when the spring is compressed and rebounded, and the two sides D of the plane bending structure are provided with internal stress release openings B to improve the fatigue resistance of parts; the outer side of each group of spring guide windows is provided with a curved surface punching structure which is tightly attached to the head and tail parts of the outer damping springs, and plays a limiting role in compression and rebound of the springs, and the two sides C of the curved surface punching structure are provided with internal stress release openings A for improving the fatigue resistance of the parts; when engine torque is transmitted to the main pump driven hub by the flywheel driving disc, the flywheel driving disc and the main pump driven hub are elastically connected together through the inner and outer vibration reduction spring groups arranged along the circumference of the main pump driven hub, so that the rigidity of a transmission system is changed, and the purpose of torsional vibration reduction is achieved.
A self-lubricating metal spring coupling which can adapt to various working conditions is used for a hydraulic excavator, as shown in figures 1 to 12, the damping spring assembly comprises an outer damping spring 8 and an inner damping spring 9 which are sleeved together, and the lengths of the outer damping spring 8 and the inner damping spring 9 are different. The outer damping spring 8 is longer than the inner damping spring 9. The vibration damping spring assembly is sleeved with the inner vibration damping spring and the outer vibration damping spring, and the lengths of the springs are different, so that the nonlinear entering work of the system stiffness from small to large can be realized, wherein the lengths of the outer springs are slightly longer, the first-order stiffness and the second-order stiffness are formed in a set torsion angle range, and the nonlinear entering work of the transmission system stiffness from small to large can be realized. When the engine is idling, the rigidity of the outer spring is smaller, and the effect of reducing idling noise is obvious; when the rated rotation speed of the engine works, the inner spring and the outer spring work together to effectively enlarge the working load range, which is beneficial to avoiding resonance of the transmission system and reducing torsional vibration and noise of the excavator during idling and operation.
As shown in the example of fig. 11, the natural frequencies of the coupling system in the first-order and second-order modes are calculated by combining the inner and outer damping springs with the inertia wheel. The excitation of the engine is derived from the reciprocating inertial force and the burst pressure after ignition, and the burst pressure is the main factor for generating the strongest excitation force and determines the main harmonic frequency. Most of the excavators are 4-stroke 6-cylinder engines, and the main harmonic of ignition excitation is 3.0. Through the two-mass system resonance rotating speed calculation formula
The primary and secondary resonance points were found to be about 720rpm in the first-order mode, and 960rpm in the second-order mode. And thenAs shown in the example of fig. 12, the resonant rotation speed is integrally moved forward by the combination of the inner and outer vibration damping springs and the inertia wheel, so that the excavator is far away from the resonant rotation speed point under three working conditions of walking, excavating and crushing. In the example, the highest vibration torque of the coupling system is 960rpm, the service life of a transmission shaft system is seriously influenced by high-load operation of an engine, and the load factor of the engine is only 15-20% when the engine is idling (1100 rpm), and the peak value is avoided, so that the influence is very small.
The hydraulic excavator mainly has four working conditions of idling, digging, walking and crushing. The working condition of the hydraulic excavator with the bucket is mainly excavating/loading operation, and the walking operation is auxiliary; the market detects that the idling working condition (1000-1100 rpm) accounts for about 10%, the walking working condition (rated rotation speed) accounts for about 10%, and the rated rotation speed digging working condition (1600-1800 rpm) accounts for about 75%. When the engine is idling, the load rate of the engine is only about 15%, the outer spring with smaller rigidity acts, and the effect of reducing idling noise is obvious through spring vibration reduction; when the engine works at the rated rotation speed, the external load is increased, the maximum instantaneous load rate of the engine can reach 100%, at the moment, the inner spring and the outer spring act together, the rigidity of the system can be improved, larger torque can be borne, and the bearing range of the working load is effectively widened; the running working condition is mostly that the engine works at the rated rotation speed of the engine, the load rate of the engine reaches between 50 and 70 percent when the engine runs on the flat ground, the load rate can reach more than 90 percent when the engine runs on a slope, and the inner spring and the outer spring jointly transmit torque. Further, the engine speed range of the crushing working condition of the excavator is 1400-1600 rpm, and the excavator belongs to a high torque speed region of the engine; the pressure range of the main pump is 200-280 bar, and the hammering frequency is 120-200 times per minute; the load factor of the engine is 50-80%. The impact frequency and strength of the inner spring and the outer spring of the coupler are high, and the strength and rigidity of the springs need to be properly enhanced. According to the resonant rotating speed calculation formula of the two-mass system
(C is the dynamic torsional rigidity of the system, J1 is the moment of inertia of the driving side, J2 is the moment of inertia of the driven side, and i is the engine ignition resonance frequency) can be obtainedIncreasing the spring rate increases the above equation C value to increase the resonant speed, but the above inertia wheel increasing measure (J2 value increase) assists in decreasing the resonant speed of the system, avoiding the excavator working speed region, and this structure (enhancing the spring strength and stiffness) is also beneficial to crushing conditions.
The self-lubricating metal spring coupling suitable for various working conditions for the hydraulic excavator is shown in fig. 1 to 8, the intelligent friction damping system comprises a friction plate 18, a pressure plate 19, a disc spring 20 and a clamp spring II 21, a limiting structure is arranged on the pressure plate 19, and a main pump driven hub 25 is provided with a notch matched with the limiting structure. The intelligent friction damping system consists of a friction plate, a pressure plate, a disc spring and a clamp spring II, wherein the friction plate is made of a copper-based friction material, so that the constancy of friction performance and overload resistance are maintained, and damping force can be generated under the condition of micro displacement; an 8-position lug structure clamping groove is formed between the friction plate and the spring guide disc II, and the pressure plate is provided with a limit structure J which is matched with a notch G of the main pump driven hub to prevent failure along with rotation of the friction plate; the whole damping system is tightly attached to one side end face of the main pump driven hub through a disc spring and a clamp spring II; when the relative motion of the coupler exceeds 2 degrees, the slip torque of the assembly is overcome, related parts slip at the moment, and the internal friction is converted into heat energy to dissipate torsional vibration energy, so that torsional peaks during equipment start-stop and load transient are effectively reduced, and the spring is prevented from being excessively compressed for a long time to accelerate failure; the friction damping is slipped under the preset load before the yield of the main structural member, and the torsional vibration energy is dissipated by virtue of internal friction, so that the torsional peak value during the start-stop and load transient of the equipment is effectively reduced, and the damping spring is protected; in addition, friction damping is helpful for reducing the capacity of the structure for transmitting vibration, plays a certain role in vibration isolation, and simultaneously reduces sound radiation and noise reduction.
The self-lubricating metal spring coupling for the hydraulic excavator, which is shown in fig. 1 to 10, is adaptable to various working conditions, wherein the front oil cavity cover 6 and the rear oil cavity cover 16 are of bowl-shaped stamping and forming structures, two rows of radiating fins are welded on the outer sides of the front oil cavity cover 6 and the rear oil cavity cover 16 respectively, the front oil cavity cover 6 and the rear oil cavity cover 16 are connected with the flywheel driving disc 1 in a sealing manner through a sealing gasket 2, a pressing gasket 3, a bolt I4 and a nut II 13, and the front oil cavity cover 6 and the rear oil cavity cover 16 are connected with the main pump driven hub 25 in a sealing manner through a V-shaped sealing ring 22 and a clamp spring III 23. The front oil cavity cover 6 is provided with two threaded holes, and the threaded holes are connected with a sealing plug 10 through taper threads. The main pump driven hub 25 seals the shaft end on the engine side through the clamp spring I11 and the oil seal 12, and the main pump driven hub 25 seals the main pump end through the clamp spring I11 and the shaft seal 26. The shaft seal 26 includes a seal lip, a spring skeleton, and an outer lip. The flywheel driving disc is made of high-strength (stiffness) alloy steel materials and is used for connecting the flywheel and a main pump driven hub, the outer ring of the flywheel driving disc is provided with 8 uniformly distributed mounting holes and is connected and fastened with the flywheel at the power output end of the engine through bolts to transmit engine torque, and the inner ring of the flywheel driving disc is provided with 16 uniformly distributed holes and is connected with the spring guide discs I and II through 16 nuts I5, 16 spacers 14 and 16 bolts II 15; the flywheel driving disc is provided with a front oil cavity cover and a rear oil cavity cover outside a spring guide disc I and a spring guide disc II respectively, two sealing gaskets are arranged at the joints of the front oil cavity cover and the rear oil cavity cover, the upper surface of the flywheel driving disc is pressed by the front oil cavity cover and the rear oil cavity cover and then is pressed by two tightening gaskets, and finally, the components are pressed together by 16 bolts I and 16 nuts II to be assembled, so that a coupling outer ring sealing structure is formed; the inner ring seal adopts 2V-shaped seal ring structures to realize radial and axial seal, and reinforcement is carried out in a clamp spring III pressing mode; the front oil cavity cover is provided with 2 threaded holes for exhausting air when one end is filled with oil and the other end is used for sealing the plug by 2 sealing plugs, and the threads of the front oil cavity cover adopt a cone thread sealing structure; the front and rear oil cavity covers are of bowl-shaped stamping forming structures, and two rows of radiating fins E are welded on the outer sides of the front and rear oil cavity covers respectively, so that the coupler automatically radiates heat in the rotating process; the sealing gasket and the V-shaped sealing ring are made of fluorosilicone rubber, and the rubber has good temperature resistance (-55-250 ℃) and chemical stability and weather resistance, and can be used for a long time in high temperature/low temperature, multiple oil and other environments. The shaft seal sealing lip K is of a flexible structure and good in sealing performance, and can solve the problem of larger eccentricity by being matched with the spring framework L; the outer lip M can effectively prevent external dust from entering, and ensures the cleanliness of molybdenum grease in the oil cavity.
The self-lubricating metal spring coupling which can adapt to various working conditions is used for the hydraulic excavator, the main pump driven hub 25 is made of forged steel, the main pump driven hub 25 is meshed with an external spline shaft of the main pump through an internal spline to transmit torque, and 6 lubricating grease channels leading to the internal spline are formed in the main pump driven hub 25. The lubricating medium is a molybdenum grease 28. The invention adds a closed self-lubricating system for preventing relative motion abrasion between metal parts, and 6 grease channels H leading to an internal spline are uniformly distributed in the circumferential direction inside a coupling sealing cavity, so that a lubricating medium automatically flows into an internal spline fit gap for lubricating; the lubricating medium adopts molybdenum grease to lubricate the spring and the spring guide window, and is communicated with the spline fit position through a channel on the driven hub of the main pump, when the coupler rotates together with the flywheel, the molybdenum grease is splashed onto the surfaces of all transmission parts through centrifugal force, an oil film is formed, the friction abrasion of parts is reduced, the surface rust is prevented, and the service life of the coupler is prolonged; the benefits of using molybdenum grease are as follows: 1) Compared with common lubricating grease, the molybdenum grease has the characteristics of more excellent chemical stability, lubricity, smaller volatility and the like, so that the service life of a lubricating product can be greatly prolonged, and the use amount of the lubricating grease is further reduced; 2) The molybdenum grease can ensure lubrication for a longer time due to the fact that the molybdenum grease does not contain organic silicon and has better high temperature resistance, and effectively reduces noise generated by vibration and friction of corresponding parts; 3) The molybdenum grease seepage is small, so that the molybdenum grease seepage can thoroughly avoid oil leakage, improve the operation environment, is suitable for places requiring clean, is nontoxic and odorless, and can meet the environmental protection requirement; 4) The friction loss of the spring window, the spring and the internal and external splines is reduced, and the friction coefficient of the molybdenum grease is lower and is between 0.05 and 0.1, so that the friction resistance of the friction device can be greatly reduced; 5) The molybdenum grease has the characteristics of moisture resistance, water resistance, alkali resistance and acid resistance, so that the service time of corresponding parts can be prolonged with high efficiency.
The self-lubricating metal spring coupling suitable for various working conditions for the hydraulic excavator is shown in fig. 1 to 4, the flywheel 27 is arranged on the main pump driven hub 25 through 3 inner hexagon screws 24, 6 round holes are uniformly formed in the position, close to the inner ring, of the flywheel 27, the outer ring of the flywheel 27 is thickened, and the mass center of the flywheel is moved to the outer ring. The inertia wheel is arranged on the side of a driven hub of a main pump, three points I in the circumferential direction of the hub are fixed by using inner hexagon screws, 6 round holes are uniformly formed in the position, close to an inner ring, of the inertia wheel, and the center of mass is moved to an outer ring by thickening the outer ring; the inertia wheel is arranged, the resonance rotating speed of the system is reduced while the inertia of the driven side is increased, and the system is far away from the working rotating speed range (1100-1800 rpm) of the engine, so that the reliability of shafting parts is improved; the maximum impact encountered by the torsion system is the moment of starting and stopping and when the external load of the engine suddenly increases, the inertia wheel can release certain energy to assist in driving the main pump to operate, so that the maximum conversion of kinetic energy is achieved, and the energy-saving effect is better.
Finally, it should be noted that: the foregoing description is only a preferred example of the present invention and is not intended to limit the present invention, but although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. The utility model provides a self-lubricating metal spring shaft coupling that can adapt to multiple operating mode for hydraulic shovel which characterized in that: the self-locking device comprises a main pump driven hub (25) connected with a main pump, wherein a plurality of spring seat windows (30) are arranged on the main pump driven hub (25) along the circumferential direction; a damping spring assembly is arranged in the spring seat window (30); spring guide discs I (7) and spring guide discs II (17) are respectively arranged on two sides of the main pump driven hub (25), damping spring guide windows (31) are arranged on the spring guide discs I (7) and the spring guide discs II (17), and the damping spring guide windows (31) are provided with guide limiting structures; the spring guide disc II (17) is arranged on one side close to the main pump, and an intelligent friction damping system is arranged between the spring guide disc II (17) and the main pump driven hub (25); the periphery of the main pump driven hub (25) is connected with a flywheel through a flywheel driving disc (1), a front oil cavity cover (6) and a rear oil cavity cover (16) are respectively arranged on two sides of the flywheel driving disc (1), the outer sides of the front oil cavity cover (6) and the rear oil cavity cover (16) are in sealing connection with the flywheel driving disc (1), and the inner sides of the front oil cavity cover (6) and the rear oil cavity cover (16) are in sealing connection with the main pump driven hub (25); the secondary hub (25) of the main pump is connected with an inertia wheel (27) at one side close to the main pump; a lubricating medium is arranged in the sealing cavity of the coupler;
the intelligent friction damping system comprises a friction plate (18), a pressure plate (19), a disc spring (20) and a clamp spring II (21), wherein a limiting structure is arranged on the pressure plate (19), and a main pump driven hub (25) is provided with a notch matched with the limiting structure.
2. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: the main pump driven hub (25) is made of forged steel, torque is transmitted through engagement of an inner spline and an outer spline shaft of the main pump by the main pump driven hub (25), and 6 grease passages leading to the inner spline are formed in the main pump driven hub (25).
3. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: 8 spring seat windows (30) are arranged on the main pump driven hub (25) along the circumferential direction, and a stress release opening is arranged on the outer side of each spring seat window (30).
4. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: the damping spring assembly comprises an outer damping spring (8) and an inner damping spring (9) which are sleeved together, and the lengths of the outer damping spring (8) and the inner damping spring (9) are different.
5. The self-lubricating metal spring coupling for a hydraulic excavator, which can adapt to various working conditions, according to claim 4, is characterized in that: the outer damping spring (8) is longer than the inner damping spring (9).
6. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: the inner side of the damping spring guide window (31) is of a plane bending structure with a guide function, the outer side of the damping spring guide window (31) is of a curved surface punching structure with a limiting function, and pressure release openings are formed in the inner side and the outer side of the damping spring guide window (31).
7. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: the front oil cavity cover (6) and the rear oil cavity cover (16) are of bowl-shaped stamping forming structures, two rows of radiating fins are welded on the outer sides of the front oil cavity cover (6) and the rear oil cavity cover (16), the front oil cavity cover (6) and the rear oil cavity cover (16) are connected with the flywheel driving disc (1) in a sealing mode through the sealing gasket (2), the pressing gasket (3), the bolt I (4) and the nut II (13), and the front oil cavity cover (6) and the rear oil cavity cover (16) are connected with the main pump driven hub (25) in a sealing mode through the V-shaped sealing ring (22) and the clamp spring III (23).
8. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: two threaded holes are formed in the front oil cavity cover (6), and the threaded holes are connected with a sealing plug (10) through taper threads.
9. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: the main pump driven hub (25) seals the shaft end of the engine side through the clamp spring I (11) and the oil seal (12), and the main pump driven hub (25) seals the main pump end through the clamp spring I (11) and the shaft seal (26).
10. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 9, wherein: the shaft seal (26) includes a seal lip, a spring skeleton, and an outer lip.
11. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: the lubricating medium is molybdenum grease (28).
12. The self-lubricating metal spring coupling adaptable to multiple working conditions for a hydraulic excavator of claim 1, wherein: the flywheel (27) is arranged on the main pump driven hub (25) through 3 inner hexagon screws (24), 6 round holes are uniformly formed in the position, close to the inner ring, of the flywheel (27), the outer ring of the flywheel (27) is thickened, and the mass center of the flywheel is moved to the outer ring.
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| CN211314972U (en) * | 2019-11-18 | 2020-08-21 | 华域动力总成部件系统(上海)有限公司 | Integrated pre-damping flywheel damper |
| CN216589763U (en) * | 2021-12-31 | 2022-05-24 | 浙江海天机械有限公司 | Torsional vibration damping system of transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2830783Y (en) * | 2005-09-30 | 2006-10-25 | 湖北三环离合器有限公司 | Double-quality flywheel suitable for pulling clutch |
| CN204553680U (en) * | 2015-03-19 | 2015-08-12 | 湖北三环离合器有限公司 | Flywheel vibration absorber |
| CN108105278A (en) * | 2017-01-25 | 2018-06-01 | 青岛丰宝汽车离合器有限公司 | Wet clutch assembly |
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| CN115354713A (en) | 2022-11-18 |
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