A high-efficiency multi-stage hydraulic coupling

Abstract

The present application relates to the technical field of hydraulic coupler, in particular to a high-efficiency multi-stage hydraulic coupler. The present application adopts the structure of disc and cavity groove, and aims to improve the utilization of liquid kinetic energy, reduce the loss in liquid flow, thereby improving the efficiency, as a power transmission medium, can start under full load, prolong the starting time, reduce the initial starting torque of the prime mover, so that the prime mover can utilize the maximum torque to start the working machine; in the transmission process, the impact can be slowed down, the torsional vibration can be isolated, the overload protection can be realized, and the low overload coefficient and high efficiency can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic couplings, in particular to a high-efficiency multi-stage hydraulic coupling. BACKGROUND

[0002] A hydraulic coupling is a hydraulic element that connects a prime mover and a working machine.

[0003] In the current application in China, there are multiple series of torque-limiting hydraulic couplings and speed-regulating hydraulic couplings, but the impellers are all single-cavity type.

[0004] The existing hydraulic couplings have the following disadvantages: poor starting ability of the prime mover, long starting time; a large amount of heat is generated during transmission, so an additional cooling system is needed to keep the oil temperature within a specified range, which increases the complexity and operating cost of the equipment. In addition, the power transmission capacity of the hydraulic coupling is proportional to the square of the input speed. When the input speed is too low, the size of the coupling needs to be increased in order to transmit the same power, which reduces the performance-price ratio.

[0005] Therefore, there is an urgent need for a new type of hydraulic coupling to solve the problems existing in the prior art. SUMMARY

[0006] The purpose of the present application is to solve the problems existing in the prior art, and the present application provides a high-efficiency multi-stage hydraulic coupling.

[0007] In order to solve the problems existing in the prior art, the present application adopts the following technical solutions:

[0008] A high-efficiency multi-stage hydraulic coupling is connected between an electric motor and a working machine, and comprises a driving coupling, a metal diaphragm, a driven coupling, a rear auxiliary cavity, an oil injection plug, an end cover, a driving disc set, a connecting cylinder, a driven disc set, a main shaft, an outer shell and a fusible plug.

[0009] The driving coupling is mounted on the shaft extension of the electric motor, and the main shaft is mounted on the shaft extension of the working machine; the driving coupling is connected to the driven coupling through the metal diaphragm, and the driven coupling is connected to the rear auxiliary cavity through bolts.

[0010] The end cover is fixed on the rear auxiliary cavity, and a rear auxiliary cavity accommodating space is formed between the rear auxiliary cavity and the end cover; the connecting cylinder is connected to the end cover, and the outer shell is fixedly connected to the connecting cylinder to form a mounting cavity; an oil injection channel and the oil injection plug are arranged on the end cover, and a drain channel and the fusible plug are arranged on the outer shell.

[0011] The main driven disc set is installed in the connecting cylinder and fixed with the connecting cylinder or the end cover;

[0012] One end of the main shaft is supported on the end cover through a bearing, and the other end of the main shaft is arranged on the shell through a bearing, the driven disc set is arranged in the installation cavity, and the driven disc set is sleeved on the main shaft, and the main driven disc set and the driven disc set form a working cavity.

[0013] As an improvement of the technical scheme of the high-efficiency multi-stage hydraulic coupling, the main driven disc set comprises a plurality of stacked main driven discs, and each disc is provided with a plurality of cavity slots; the driven disc set comprises a plurality of stacked driven discs, and each disc is provided with a plurality of cavity slots.

[0014] As an improvement of the technical scheme of the high-efficiency multi-stage hydraulic coupling, the structure of the cavity slot of each main driven disc is different from that of each driven disc; wherein the structure of the cavity slot comprises the number, shape and / or size of the cavity slot.

[0015] As an improvement of the technical scheme of the high-efficiency multi-stage hydraulic coupling, the number of discs of the main driven disc set is N1, the number of discs of the driven disc set is N2, and the number of stages of the high-efficiency multi-stage hydraulic coupling is N=(N1+N2)-1.

[0016] As an improvement of the technical scheme of the high-efficiency multi-stage hydraulic coupling, the single-stage transmission torque M of the high-efficiency multi-stage hydraulic coupling i (i=1, 2, 3, 4, 5), M i determined by test. The total transmission torque is the sum of the transmission torque of each disc pump wheel, that is: M=∑(M1+M2+M3+…). The transmission power is P, wherein P=M×n÷9550;

[0017] P is the transmission power (kW), and n is the rotating speed of the disc pump wheel (r / min).

[0018] As an improvement of the technical scheme of the high-efficiency multi-stage hydraulic coupling, each main driven disc comprises 40-60 cavity slots, each driven disc comprises 40-60 cavity slots, and the number difference of the cavity slots of the main driven disc and the driven disc is 3-5.

[0019] The beneficial effects of the present application are:

[0020] 1. The present application is mainly applied in mechanical transmission in mining, metallurgy, chemical industry, power industry and the like, and has the advantages of full-load starting, prolonging starting time, reducing starting current, improving starting ability of the original motor, reducing impact and vibration, preventing power overload, prolonging service life of the machinery and the like;

[0021] 2、The application adopts the structure of disc and cavity groove, and aims to improve the utilization of liquid kinetic energy, reduce the loss in liquid flow, thereby improving the efficiency, as a power transmission medium, can start under full load, prolong the starting time, reduce the initial starting torque of the prime mover, so that the prime mover can utilize the maximum torque to start the working machine; can slow down the impact, isolate the torsional vibration, overload protection, realize low overload coefficient and high efficiency during transmission;

[0022] 3、The application adopts the disc structure, through the action of the liquid in the cavity groove, the working liquid can flow faster in the cavity groove of the driving disc set and the driven disc set, the working liquid exchange between the working cavity and the rear auxiliary cavity is faster through the connection of the rear auxiliary cavity and the driving disc set, directly and effectively improving the heat dissipation effect of the fluid coupling;

[0023] 4、The application has high balance accuracy, ensures the overall liquid dynamic balance of the coupling, effectively prevents vibration and operation sound during use, and greatly improves the strength and rigidity;

[0024] 5、In the application, through the setting of the number of corresponding driving disc and driven disc in the driving disc set and the driven disc set, the multi-stage effect is realized, the more the number of stages is, the greater the transmission power is, the transmission slip is reduced, the overload coefficient is lower, the starting is stable, the capacity of the working liquid of the fluid coupling is improved, the transmission power of the fluid coupling is increased, and the need of better bearing large load is met, and the working needs of large inertia, high speed and large power working machine are met. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the application;

[0026] Figure 2 is a structural schematic view of the application in use.

[0027] Mark explanation: 1-driving coupling; 2-metal diaphragm; 3-driven coupling; 4-rear auxiliary cavity; 5-oil filling plug; 6-end cover; 7-driving disc set; 8-connection cylinder; 9-driven disc set; 10-main shaft; 11-outer shell; 12-fusible plug. DETAILED DESCRIPTION

[0028] In order to make the invention purpose, technical scheme and beneficial effects of the application clearer, the technical scheme in the embodiment of the application will be described clearly and completely in combination with the drawings in the embodiment of the application. Obviously, the described embodiment is only a part of the embodiments of the application, not all the embodiments.

[0029] EMBODIMENT

[0030] As Figure 1As shown, a high-efficiency multi-stage type fluid coupling is connected between a motor and a working machine, and comprises a driving coupling 1, a metal diaphragm 2, a driven coupling 3, a rear auxiliary cavity 4, an oil injection plug 5, an end cover 6, a driving disc set 7, a connecting cylinder 8, a driven disc set 9, a main shaft 10, an outer shell 11 and a fusible plug 12.

[0031] The driving coupling 1 is installed on the shaft extension of the motor, and the main shaft 10 is installed on the shaft extension of the working machine; the driving coupling 1 is connected with the driven coupling 3 through the metal diaphragm 2, and the driven coupling 3 is connected with the rear auxiliary cavity 4 through bolts.

[0032] The end cover 6 is fixed on the rear auxiliary cavity 4, and the rear auxiliary cavity 4 and the end cover 6 form a rear auxiliary cavity 4 accommodating space therebetween; the connecting cylinder 8 is in opposite connection with the end cover 6, and the outer shell 11 is in fixed and opposite connection with the connecting cylinder 8 and forms a mounting cavity; the end cover 6 is provided with an oil injection channel and the oil injection plug 5, and the outer shell 11 is provided with a oil discharge channel and the fusible plug 12.

[0033] The driving disc set 7 is installed in the connecting cylinder 8 and is fixed with the connecting cylinder 8 or the end cover 6.

[0034] One end of the main shaft 10 is supported on the end cover 6 through a bearing, and the other end of the main shaft 10 is arranged on the outer shell 11 through a bearing; the driven disc set 9 is arranged in the mounting cavity and is sleeved on the main shaft 10; the driving disc set 7 and the driven disc set 9 form a working cavity.

[0035] In detail, in the present application, the disc structure is adopted, and the working liquid can flow faster in the cavity groove of the driving disc set 7 and the driven disc set 9 through the liquid action in the cavity groove; the working liquid exchange between the working cavity and the rear auxiliary cavity 4 is faster through the communication between the rear auxiliary cavity 4 and the driving disc set 7, and the heat dissipation effect of the fluid coupling is directly and effectively improved.

[0036] In working, the motor drives the hydraulic coupler main disc group 7 to rotate through the driving joint 1, the metal diaphragm 2, the driven joint 3, the rear auxiliary cavity 4, the end cover 6, the driving disc group 7, the shell 11, and the working liquid in the cavity groove of the hydraulic coupler driving disc group 7 is pushed by the centrifugal force and the double action of the driving disc group 7 cavity groove opposite to the turning side, is accelerated and pressurized from the two sides of the driving disc group 7 cavity groove opposite to the turning side to the outer edge, the momentum of the liquid is increased, that is, the mechanical energy input by the motor is converted into the kinetic energy of the liquid, when the working liquid with the kinetic energy of the liquid is rushed to the opposite driven disc group 9 from the two sides of the driving disc group 7 opposite to the turning side, the liquid flow impacts the cavity groove of the driven disc group 9 on the two sides opposite to the turning side, so that the same direction rotation as the driving disc group 7 is obtained, that is, the kinetic energy of the liquid is converted into mechanical energy, the driven disc group 9 is driven to rotate and the main shaft 10 is driven to work.

[0037] The application is mainly applied to mechanical transmission in mining, metallurgy, chemical industry, electric power and other industries, and has the advantages of full-load starting, prolonged starting time, reduced starting current, improved starting ability of the prime mover, reduced impact and vibration, prevention of power overload, prolonged service life of the machine and the like.

[0038] The application adopts the structure of the disc and the cavity groove, aims to improve the utilization of the kinetic energy of the liquid, reduce the loss in the liquid flow, thereby improve the efficiency, as the power transmission medium, can start under full load, prolong the starting time, reduce the initial starting torque of the prime mover, enable the prime mover to utilize the maximum torque to start the working machine, can reduce the impact in the transmission process, isolate the torsional vibration, protect the overload, realize the low overload coefficient and high efficiency.

[0039] The application adopts the disc structure, through the action of the liquid in the cavity groove, the working liquid can flow faster in the cavity groove of the driving disc group and the driven disc group, the working liquid exchange between the working cavity and the rear auxiliary cavity is faster through the communication of the rear auxiliary cavity and the driving disc group, and the heat dissipation effect of the hydraulic coupler is directly and effectively improved.

[0040] The application has high balance precision, ensures the overall liquid dynamic balance of the coupler, effectively prevents the vibration and operation sound generated during use, and greatly improves the strength and rigidity.

[0041] In the present application, by setting the number of corresponding driving and driven discs in the driving disc set and the driven disc set, the multi-stage effect is realized. The more the number of stages, the greater the transmission power, the less the transmission slip, the lower the overload coefficient, the smoother the start, which can improve the capacity of the working fluid of the fluid coupling, increase the transmission power of the fluid coupling, and better withstand the need of large load.

[0042] In some embodiments of the present application, the driving disc set 7 includes a plurality of driving discs arranged in stacks, each disc being provided with a plurality of cavities; the driven disc set 9 includes a plurality of driven discs arranged in stacks, each disc being provided with a plurality of cavities. Further, the structure of the cavities of each driving disc is different from that of each driven disc; wherein the structure of the cavities includes the number, shape and / or size of the cavities, so that the torque transmission is stable, the hydraulic loss is reduced, and the transmission efficiency and stability of the equipment are improved.

[0043] In detail, in the present application, the number of discs of the driving disc set 7 is N1, the number of discs of the driven disc set 9 is N2, and the number of stages of the high-efficiency multi-stage fluid coupling is N=(N1+N2)-1. Further, the single-stage transmission torque M of the high-efficiency multi-stage fluid coupling is M i (i=1, 2, 3, 4, 5), M i The total transmission torque is the sum of the transmission torque of each disc, i.e. M=∑(M1+M2+M3+…). The transmission power is P, wherein P=M×n÷9550; P is the transmission power (kW), and n is the speed of the disc pump (r / min).

[0044] More specifically, before use, the number of driving discs and / or driven discs can be adjusted as needed.

[0045] The number of driving discs of the driving disc set 7 is N1, the number of driven discs of the driven disc set 9 is N2, and the number of stages of a high-efficiency multi-stage fluid coupling is N=(N1+N2)-1. As an example of this embodiment, the number of driving discs is 2, the number of driven discs is 3, and the number of stages is 4.

[0046] With the increase of the number of stages of the driving disc set 7 and the driven disc set 9, the transmission power increases, the transmission slip decreases, the overload coefficient is lower, the start is smoother, which can improve the capacity of the working fluid of the fluid coupling, increase the transmission power of the fluid coupling, and better withstand the need of large load.

[0047] The active disc group 7 and the driven disc group 9 have multiple working cavities, which can balance the axial force generated during the working of the coupling, simplify the structure of the coupling, meet the working requirements of the working machine with large inertia, high rotating speed and large power, improve the service life of the bearing and prolong the service life of the machine.

[0048] As a specific embodiment of the present embodiment, the active disc group 7 is composed of active disc plates with a certain number of cavities. Each disc plate has 40-60 cavities, and the cavity structure of the active disc plates is the same in the same product, and the cavity structure of the active disc plates of different models is the same or different.

[0049] The driven disc group 9 is composed of driven disc plates with a certain number of cavities. Each disc plate has 40-60 cavities, and the cavity structure of the driven disc plates is the same in the same product, and the cavity structure of the driven disc plates of different models is the same or different.

[0050] The number of cavities of the active disc plates of the active disc group 7 and the driven disc plates of the driven disc group 9 is different by 3-5.

[0051] The installation steps and disassembly steps of the present application are as follows:

[0052] The main shaft 10 of the high-efficiency multi-stage hydraulic coupling is sleeved on the working machine shaft, and the main shaft 10 is axially fixed with the working machine. The working machine is installed according to the installation requirements, and the foot bolts of the working machine are tightened.

[0053] The driving coupling 1 of the high-efficiency multi-stage hydraulic coupling is installed on the shaft extension of the motor, and when the motor is installed, the driving coupling 1 is matched with the shaft extension of the motor. The motor is moved to make the driving coupling 1 and the high-efficiency multi-stage hydraulic coupling match and combine into a whole. The matching end faces of the driving coupling 1 and the high-efficiency multi-stage hydraulic coupling should have a gap of 3-9 mm. If it is a large-size product, the gap should be larger.

[0054] The radial deviation, axial inclination and gap of the driving coupling 1 and the driven coupling 3 are measured, the motor base gasket thickness is converted according to the deviation value, the motor base is added with a gasket, the radial deviation, axial inclination of the driving coupling 1 and the driven coupling 3 are measured again, and then the gasket is increased or decreased until the radial deviation, axial inclination of the driving coupling 1 and the driven coupling 3 are within the installation alignment range.

[0055] The installation distance of the motor is adjusted until the gap of the driving coupling 1 and the driven coupling 3 is within the installation alignment range; the swing angle of the motor is adjusted so that the axial inclination of the driving coupling 1 and the driven coupling 3 is within the installation alignment range.

[0056] The foot bolts of the motor are tightened, the installation alignment accuracy of the motor and the working machine shaft is checked, and the radial deviation, axial inclination and gap of the driving coupling 1 and the driven coupling 3 meet the requirements.

[0057] If the installation alignment accuracy does not meet the requirements, loosen the motor foot bolts, add or subtract motor foot pads and swing angle according to the measured value, then tighten the motor foot bolts, recheck the installation alignment accuracy of the motor and the working machine axis until the requirements are met.

[0058] The high-efficiency multi-stage fluid coupling driving and driven rotors are respectively rotated, flexible and without jam.

[0059] The oil injection plug 5 and the fusible plug 12 on the same side of the high-efficiency multi-stage fluid coupling are disassembled, the installation hole of the disassembled oil injection plug 5 is rotated to the top, and oil is added to the high-efficiency multi-stage fluid coupling to meet the transmission power requirements.

[0060] The disassembled oil injection plug 5 and the fusible plug 12 are screwed on and tightened. Note that the O-shaped sealing ring at the oil injection plug 5 and the fusible plug 12 cannot be damaged.

[0061] Check the installation and electrical conditions of the motor and the working machine to make the equipment meet the requirements of the trial operation.

[0062] The motor is jogged, and the motor rotation direction is observed, which should be consistent with the specified direction of the equipment.

[0063] The motor is started, and the starting conditions of the motor and the working machine are observed, which should meet the starting requirements of the equipment. After the operation is stable, the operation conditions of the motor, the high-efficiency multi-stage fluid coupling and the working machine are checked, which should be normal.

[0064] The working machine is loaded for trial operation. During the trial operation, the operation conditions of the motor, the high-efficiency multi-stage fluid coupling and the working machine are checked, which should be normal. After meeting the requirements, the equipment can be put into normal operation.

[0065] The disassembly steps of the present application are as follows:

[0066] Loosen the motor foot bolts, move the motor and the high-efficiency multi-stage fluid coupling body horizontally backward, and move the driving coupling 1 and the driven coupling 3 to a distance that can be separated upward, downward and leftward.

[0067] Use a sling to cross the high-efficiency multi-stage fluid coupling body and make the sling force and firm, and loosen the main shaft 10 fastening bolt.

[0068] Disassemble the oil injection plug 5 and the fusible plug 12 on the same side, and drain the working oil in the fluid coupling.

[0069] Use a puller or a bolt to separate the high-efficiency multi-stage fluid coupling from the working machine shaft.

[0070] Disassemble the connecting bolt between the rear auxiliary cavity 4 and the pump wheel end cover 6, and disassemble the rear auxiliary cavity 4.

[0071] The connecting bolt between the pump wheel end cover 6 and the connecting cylinder 8 and the shell 11 is disassembled, and the connecting cylinder 8 and the shell 11 are disassembled.

[0072] The connecting bolt between the disc pump wheel and the main shaft 10 is disassembled, and the driving disc group 7 and the driven disc group 9 are disassembled in sequence.

[0073] So far, the present application has been disassembled.

[0074] As a specific embodiment of the present embodiment, as shown in Table 1, a high-efficiency multi-stage type hydraulic coupler model and code representation method.

[0075] A high-efficiency multi-stage type hydraulic coupler model and code representation method:

[0076]

[0077] Table 1

[0078] Label example: a high-efficiency multi-stage hydraulic coupler with a cavity groove effective diameter of 500 mm and including two driving disc group quantities, the model and code representation is YOXGD400-2.

[0079] A high-efficiency multi-stage type hydraulic coupler structure form, as shown in Table 2

[0080]

[0081] Table 2

[0082] A high-efficiency multi-stage type hydraulic coupler main technical parameter, as shown in Table 3

[0083]

[0084]

[0085]

[0086] Table 3

[0087] From the above three tables, in the present application, the structure of the disc and the cavity groove is adopted, the purpose is to improve the utilization of liquid kinetic energy, reduce the loss in liquid flow, thereby improving the efficiency, as a power transmission medium, can start under full load, prolong the starting time, reduce the initial starting torque of the prime mover, so that the prime mover can utilize the maximum torque to start the working machine; In the transmission process, the impact can be slowed down, the torsional vibration can be isolated, the overload protection can be realized, and the low overload coefficient and high efficiency can be realized.

[0088] Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the present application.

Claims

1. A high-efficiency multi-stage type fluid coupling, characterized by, The high-efficiency multi-stage hydraulic coupling is connected between a motor and a working machine, and comprises a driving joint, a metal diaphragm, a driven joint, a rear auxiliary cavity, an oil injection plug, an end cover, a driving disc set, a connecting cylinder, a driven disc set, a main shaft, a housing and a fusible plug. The driving joint is mounted on a shaft extension of the motor, and the main shaft is mounted on a shaft extension of the working machine. The driving joint is connected with the driven joint through the metal diaphragm, and the driven joint is connected with the rear auxiliary cavity through bolts. The end cover is fixed on the rear auxiliary cavity, and a rear auxiliary cavity accommodating space is formed between the end cover and the rear auxiliary cavity. The driving disc set is mounted in the connecting cylinder and fixed with the connecting cylinder or the end cover.

2. The high-efficiency multi-stage fluid coupling as set forth in claim 1, wherein, One end of the main shaft is supported on the end cover through a bearing, and the other end of the main shaft is arranged on the housing through a bearing.

3. The high-efficiency multi-stage fluid coupling of claim 2, wherein, The driving disc set and the driven disc set form a working cavity.

4. The high-efficiency multi-stage fluid coupling of claim 3, wherein, The driving disc set comprises a plurality of stacked driving discs, and each disc is provided with a plurality of cavity slots.

5. The high-efficiency multistage fluid coupling of claim 4 wherein, The single-stage transmission torque M of the high-efficiency multi-stage type hydraulic coupling i (i = 1, 2, 3, 4, 5), M i Determined by test; the total transmission torque is the sum of the transmission torque of each stage disc pump wheel, that is: M = ∑(M1+M2+M3+…); the transmission power is P, wherein P = M × n ÷ 9550; The cavity slots of each driving disc are different from the cavity slots of each driven disc in structure.

6. The high-efficiency multistage fluid coupling of claim 4 wherein, The structure of the cavity slots includes the number, shape and / or size of the cavity slots. The number of discs of the driving disc set is N1, the number of discs of the driven disc set is N2, and the number of stages of the high-efficiency multi-stage hydraulic coupling is N=(N1+N2)-1. P is the transmitted power (kW), and n is the rotating speed of the disc pump (r / min). Each driving disc comprises 40-60 cavity slots, and each driven disc comprises 40-60 cavity slots. The number of cavity slots of the driving disc and the driven disc is 3-5.

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