Efficient multi-stage fluid coupling

Abstract

The invention relates to the technical field of hydraulic couplers, in particular to an efficient multi-stage hydraulic coupler. The structure of the disc and the cavity groove is adopted, so that utilization of liquid kinetic energy is improved, loss in liquid flowing is reduced, efficiency is improved, the disc serves as a power transmission medium, full-load starting can be achieved, the starting time is prolonged, the initial starting torque of a prime motor is reduced, and the prime motor can start a working machine through the maximum torque; in the transmission process, impact can be relieved, torsional vibration can be isolated, overload protection is achieved, and the low overload coefficient and high efficiency are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic couplers, in particular to a high-efficiency multi-stage hydraulic coupler. Background Art

[0002] A hydraulic coupling is a hydraulic component that uses liquid as the working medium to connect the prime mover with the working machine.

[0003] In the current application of hydraulic couplings in my country, there are several series of torque-limited hydraulic couplings and speed-regulating hydraulic couplings, but the impellers are all single-chamber type.

[0004] The existing hydraulic coupling has the following shortcomings: the starting ability of the prime mover is poor and the starting time is long; a large amount of heat is generated during the transmission process, so an additional cooling system is required to keep the oil temperature within the specified range, which increases the complexity of the equipment and the operating cost. In addition, since the power transmission ability of the hydraulic coupling is proportional to the square of its input speed, when the input speed is too low, in order to transmit the same power, the specifications of the coupler need to be increased, which will lead to a decrease in the performance-price ratio.

[0005] Based on this, a new type of hydraulic coupling is urgently needed to solve the problems existing in the prior art. Summary of the invention

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

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

[0008] A high-efficiency multi-stage hydraulic coupler 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 filling plug, an end cover, a driving disc group, a connecting tube, a driven disc group, a main shaft, a housing and a fusible plug;

[0009] The active coupling is mounted on the shaft extension of the motor, and the main shaft is mounted on the shaft extension of the working machine; the active 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 tube is connected to the end cover, and the outer shell is fixedly connected to the connecting tube to form a mounting cavity; the end cover is provided with an oil filling channel and the oil filling plug, and the outer shell is provided with an oil drain channel and the fusible plug;

[0011] The active disc assembly is installed in the connecting tube and fixed to the connecting tube 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 housing through a bearing. The driven disc group is placed in the installation cavity, and the driven disc group is sleeved on the main shaft. The active disc group and the driven disc group form a working cavity.

[0013] As an improvement of the technical solution of the high-efficiency multi-stage hydraulic coupling of the present invention, the active disc group includes a plurality of superimposed active discs, each of which is provided with a plurality of cavities; the driven disc group includes a plurality of superimposed driven discs, each of which is provided with a plurality of cavities.

[0014] As an improvement to the technical solution of the high-efficiency multi-stage hydraulic coupling of the present invention, the structure of the cavity of each active disc is different from the structure of the cavity of each driven disc; wherein the structure of the cavity includes the number, shape and / or size of the cavity.

[0015] As an improvement of the technical solution of the high-efficiency multi-stage hydraulic coupling of the present invention, the number of discs in the active disc group is N1, the number of discs in the driven disc group 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 solution of the high-efficiency multi-stage hydraulic coupling of the present invention, the single-stage transmission torque M of the high-efficiency multi-stage hydraulic coupling i (i=1,2,3,4,5),M i The total transmission torque is the sum of the transmission torques of the disc pumps of each stage, that is, M = ∑ (M1 + M2 + M3 + ...). The transmission power is P, where P = M × n ÷ 9550;

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

[0018] As an improvement on the technical solution of the high-efficiency multi-stage hydraulic coupling of the present invention, each of the active discs includes 40-60 cavities, and each of the driven discs includes 40-60 cavities, and the difference in the number of cavities between the active disc and the driven disc is 3-5.

[0019] Beneficial effects of the present invention:

[0020] 1. The present invention is mainly used in mechanical transmission in mining, metallurgy, chemical industry, electric power and other industries. It can start at full load, extend the starting time, reduce the starting current, improve the starting ability of the standard prime mover, reduce impact and vibration, prevent power overload, and extend the service life of the machine.

[0021] 2. The present invention adopts a disc and cavity structure, the purpose of which is to improve the utilization of liquid kinetic energy, reduce the loss in liquid flow, and thus improve efficiency. As a power transmission medium, it can start at full load, extend the starting time, reduce the initial starting torque of the prime mover, and enable the prime mover to use the maximum torque to start the working machine; during the transmission process, it can reduce impact, isolate torsional vibration, and provide overload protection, thereby achieving a low overload coefficient and high efficiency;

[0022] 3. The present invention adopts a disc structure, and through the action of the liquid in the cavity, the working liquid can flow faster in the cavity of the active disc group and the driven disc group. The working liquid in the working cavity and the rear auxiliary cavity are connected to the active disc group, and the working liquid exchange between the working cavity and the rear auxiliary cavity is faster, which directly and effectively improves the heat dissipation effect of the hydraulic coupling;

[0023] 4. The present invention has high balancing accuracy, ensuring the overall liquid-filled dynamic balance of the coupler, effectively preventing vibration and operating noise during use, and greatly improving strength and rigidity;

[0024] 5. In the present invention, a multi-stage effect is achieved by setting the number of corresponding active discs and driven discs in the active disc group and the driven disc group. The more stages there are, the greater the transmission power is, the less transmission slip is, the lower the overload coefficient is, and the smoother the start-up is. This can increase the capacity of the working fluid of the hydraulic coupling and increase the transmission power of the hydraulic coupling, so that it can better withstand the needs of large loads and meet the working needs of large inertia, high speed, and high power working machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the use state of the present invention.

[0027] Explanation of the reference numerals: 1 - driving coupling; 2 - metal diaphragm; 3 - driven coupling; 4 - rear auxiliary chamber; 5 - oil filling plug; 6 - end cover; 7 - driving disc group; 8 - connecting tube; 9 - driven disc group; 10 - main shaft; 11 - housing; 12 - fusible plug. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and beneficial effects of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Implementation

[0030] like Figure 1As shown, a high-efficiency multi-stage hydraulic coupler is connected between the motor and the working machine. The high-efficiency multi-stage hydraulic coupler includes an active coupling 1, a metal diaphragm 2, a driven coupling 3, a rear auxiliary cavity 4, an oil filling plug 5, an end cover 6, an active disc group 7, a connecting tube 8, a driven disc group 9, a main shaft 10, a housing 11 and a fusible plug 12;

[0031] The active 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 active coupling 1 is connected to the driven coupling 3 through the metal diaphragm 2, and the driven coupling 3 is connected to the rear auxiliary cavity 4 through bolts;

[0032] The end cover 6 is fixed on the rear auxiliary cavity 4, and a rear auxiliary cavity 4 accommodating space is formed between the rear auxiliary cavity 4 and the end cover 6. The connecting tube 8 is connected to the end cover 6, and the outer shell 11 is fixedly connected to the connecting tube 8 to form a mounting cavity; the end cover 6 is provided with an oil filling channel and an oil filling plug 5, and the outer shell 11 is provided with an oil drain channel and a fusible plug 12;

[0033] The active disc assembly 7 is installed in the connecting tube 8 and fixed to the connecting tube 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 set on the housing 11 through a bearing. The driven disc group 9 is placed in the installation cavity, and the driven disc group 9 is sleeved on the main shaft 10. The driving disc group 7 and the driven disc group 9 form a working cavity.

[0035] In detail, in the present invention, a disc structure is adopted, and through the action of the liquid in the cavity, the working fluid can flow faster in the cavity of the active disc group 7 and the driven disc group 9. The rear auxiliary cavity 4 is connected with the active disc group 7, and the working fluid exchange between the working cavity and the rear auxiliary cavity 4 is faster, which directly and effectively improves the heat dissipation effect of the hydraulic coupling.

[0036] When working, the motor drives the active disc group 7 of the hydraulic coupling to rotate through the active coupling 1, the metal diaphragm 2, the driven coupling 3, the rear auxiliary cavity 4, the end cover 6, the active disc group 7, and the housing 11. The working fluid in the cavity groove of the active disc group 7 of the hydraulic coupling is subjected to the dual effects of centrifugal force and the push of the cavity groove of the active disc group 7 on the side facing the steering direction. The working fluid is accelerated and pressurized to flow to the outer edge from both sides of the cavity groove of the active disc group 7 on the side facing the steering direction, and the kinetic moment of the liquid is increased, that is, the active disc group 7 converts the mechanical energy input by the motor into liquid kinetic energy. When the working fluid with liquid kinetic energy rushes from both sides of the side facing the steering direction of the active disc group 7 to the opposite driven disc group 9, the liquid flow impacts both sides of the cavity groove of the driven disc group 9 on the opposite side, so that it rotates in the same direction as the active disc group 7. That is to say, the liquid kinetic energy is converted into mechanical energy again, driving the driven disc group 9 to rotate and the main shaft 10 drives the working machine to do work. After releasing the kinetic energy of the liquid, the working liquid flows out of the driven disc group 9 to the cavity of the active disc group 7, and starts the next circulation flow again. In this way, the working liquid flows repeatedly between the active disc group 7 and the driven disc group 9, and the driven disc group 9 drives the main shaft 10 and transmits the power to the working machine to do work. That is, the output and the input are flexibly connected together by the kinetic energy of the liquid without any mechanical connection.

[0037] The present invention is mainly used in mechanical transmission in mining, metallurgy, chemical industry, electric power and other industries, and has the advantages of being able to start at full load, prolong starting time, reduce starting current, improve starting ability of standard prime movers, reduce impact and vibration, prevent power overload, and prolong mechanical service life.

[0038] The present invention adopts a disc and cavity structure, the purpose of which is to improve the utilization of liquid kinetic energy, reduce the loss in liquid flow, and thus improve efficiency. As a power transmission medium, it can start at full load, extend the starting time, reduce the initial starting torque of the prime mover, and enable the prime mover to use the maximum torque to start the working machine; during the transmission process, it can reduce impact, isolate torsional vibration, and provide overload protection, thereby achieving a low overload coefficient and high efficiency;

[0039] The present invention adopts a disc structure, and through the action of the liquid in the cavity, the working liquid can flow faster in the cavity of the active disc group and the driven disc group. The rear auxiliary cavity is connected with the active disc group, and the working liquid exchange between the working cavity and the rear auxiliary cavity is faster, which directly and effectively improves the heat dissipation effect of the hydraulic coupler.

[0040] The present invention has high balancing accuracy, ensures the overall liquid-filled dynamic balance of the coupler, effectively prevents vibration and operating noise during use, and greatly improves strength and rigidity;

[0041] In the present invention, a multi-stage effect is achieved by setting the number of corresponding active discs and driven discs in the active disc group and the driven disc group. The more stages there are, the greater the transmission power is, the less transmission slip is, the lower the overload coefficient is, and the smoother the startup is. This can not only increase the capacity of the working fluid of the hydraulic coupling, but also increase the transmission power of the hydraulic coupling, and can better withstand the needs of large loads, meeting the working needs of large inertia, high speed, and high power working machines.

[0042] In some embodiments of the present invention, the active disc group 7 includes a plurality of superimposed active discs, each of which is provided with a plurality of cavities; the driven disc group 9 includes a plurality of superimposed driven discs, each of which is provided with a plurality of cavities. Further, the structure of the cavity of each active disc is different from the structure of the cavity of each driven disc; wherein the structure of the cavity includes the number, shape and / or size of the cavity, so that the torque transmission is smooth, the hydraulic loss is reduced, and the transmission efficiency of the equipment and the stability of the equipment operation are improved.

[0043] Specifically, in the present invention, the number of discs of the active disc group 7 is N1, the number of discs of the driven disc group 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 i (i=1,2,3,4,5),M i The total transmission torque is the sum of the transmission torques of each disc pump wheel, that is, M = ∑ (M1 + M2 + M3 + ...). The transmission power is P, where P = M × n ÷ 9550; P is the transmission power (kW), n----the speed of the disc pump wheel (r / min).

[0044] More specifically, before use, the present invention can adjust the number of active discs and / or driven discs as needed.

[0045] The number of active discs of the active disc group 7 is N1, the number of driven discs of the driven disc group 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 structural type is: the number of active discs is 2, the number of driven discs is 3, and the number of stages is 4.

[0046] As the number of combinations of the active disc group 7 and the driven disc group 9 increases, the transmission power increases, the transmission slip decreases, the overload coefficient is low, and the startup is smooth, which can not only increase the capacity of the hydraulic coupling working fluid, but also increase the transmission power of the hydraulic coupling, and can better withstand the needs of large loads.

[0047] The active disc group 7 and the driven disc group 9 have multiple stages and multiple working chambers, which can balance the axial force generated when the coupler is working, simplify the structure of the coupler, thereby meeting the working needs of large inertia, high speed, and high power working machines, improving the bearing life, and extending the service life of the machine.

[0048] As a specific example of this embodiment, the active disc group 7 is composed of active discs with a certain number of cavities. Each disc has 40 to 60 cavities. The active disc cavity structure is the same for the active discs of the same product, and the active discs of different models have the same or different structures.

[0049] The driven disc set 9 is composed of a stack of driven discs with a certain number of cavities. Each disc has 40 to 60 cavities. The driven disc cavity structure is the same for the same product, and the driven discs of different models may have the same or different structures.

[0050] The number of cavities of the active discs of the active disc set 7 and the number of cavities of the driven discs of the driven disc set 9 differ by 3-5.

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

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

[0053] An active coupling 1 of a high-efficiency multi-stage hydraulic coupling is installed on the motor shaft extension. When the motor is installed, the active coupling 1 cooperates with the motor shaft extension. The motor is moved so that the active coupling 1 and the high-efficiency multi-stage hydraulic coupling are combined into a whole. A gap of 3 to 9 mm is left between the mating end faces of the active coupling 1 and the high-efficiency multi-stage hydraulic coupling. If it is a large-size product, the gap takes a larger value.

[0054] Measure the radial deviation, axial inclination and clearance of the active coupling 1 and the driven coupling 3, and convert the thickness of the motor base gasket according to the deviation value. After adding the gasket to the motor base, measure the radial deviation and axial inclination of the active coupling 1 and the driven coupling 3 again, and then add or remove gaskets until the radial deviation and axial inclination of the active coupling 1 and the driven coupling 3 are within the installation alignment range.

[0055] Adjust the installation distance of the motor until the clearance between the active coupling 1 and the driven coupling 3 is within the installation alignment range; adjust the swing angle of the motor so that the axis of the active coupling 1 and the driven coupling 3 are tilted within the installation alignment range.

[0056] Tighten the anchor bolts of the motor, check the installation and alignment accuracy of the motor and the working machine axis, and make sure that the radial deviation, axis inclination and clearance of the active coupling 1 and the driven coupling 3 meet the requirements.

[0057] If the installation alignment accuracy does not meet the requirements, loosen the motor anchor bolts, add or subtract the motor anchor gaskets and swing angles according to the measured values, then tighten the motor anchor bolts, and recheck the installation alignment accuracy between the motor and the working machine axis until it meets the requirements.

[0058] The active and driven rotors of the high-efficiency multi-stage hydraulic coupling are rotated separately, and the rotation is flexible and without sticking.

[0059] Remove the oil filling plug 5 and fusible plug 12 on the same side of the high-efficiency multi-stage hydraulic coupling, rotate the mounting hole of the removed oil filling plug 5 to the top, and add oil to the high-efficiency multi-stage hydraulic coupling until it meets the power transmission requirements.

[0060] Screw on the removed oil filling plug 5 and fusible plug 12 and tighten them. Be careful not to damage the O-rings at the oil filling plug 5 and fusible plug 12.

[0061] Check the installation and electrical conditions of the motor and working machine to ensure that the equipment meets the test run requirements.

[0062] Jog the motor and observe the direction of rotation, which should be consistent with the direction specified by the equipment.

[0063] Start the motor and observe the starting conditions of the motor and the working machine. They should meet the starting requirements of the equipment. After stable operation, check the operation of the motor, high-efficiency multi-stage hydraulic coupling and the working machine. There should be no abnormality.

[0064] The working machine is loaded for trial operation. During the trial operation, the operation of the motor, high-efficiency multi-stage hydraulic coupling and working machine should be checked. There should be no abnormality. After meeting the requirements, the equipment can be put into normal operation.

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

[0066] Loosen the motor anchor bolts, move the motor together with the high-efficiency multi-stage hydraulic coupling body horizontally backward, and move the active coupling 1 and the driven coupling 3 to a distance where they can be disengaged up, down, left, and right.

[0067] Use a sling to cross the body of the high-efficiency multi-stage hydraulic coupling and make the sling stressed and firm, and loosen the fixing bolts on the main shaft 10.

[0068] Remove the oil filling plug 5 and fusible plug 12 on the same side and drain the working oil in the hydraulic coupling.

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

[0070] Remove the connecting bolts between the rear auxiliary chamber 4 and the impeller end cover 6, and remove the rear auxiliary chamber 4.

[0071] Remove the connecting bolts between the impeller end cover 6 and the connecting tube 8 and the outer shell 11, and remove the connecting tube 8 and the outer shell 11.

[0072] Remove the bolts connecting the disc pump wheel and the main shaft 10, and disassemble the active disc group 7 and the driven disc group 9 in turn.

[0073] At this point, the present invention has been disassembled.

[0074] As a specific example of the present embodiment, as shown in Table 1, a method for indicating the model and code of a high-efficiency multi-stage hydraulic coupling.

[0075] A method for expressing the model and code of a high-efficiency multi-stage hydraulic coupling:

[0076]

[0077] Table 1

[0078] Marking example: The effective diameter of the cavity is 500mm, and it includes a high-efficiency multi-stage hydraulic coupling with 2 active disc groups. Its model and code are represented as: YOXGD400-2.

[0079] The structure of a high-efficiency multi-stage hydraulic coupling is shown in Table 2.

[0080]

[0081] Table 2

[0082] The main technical parameters of a high-efficiency multi-stage hydraulic coupling are shown in Table 3.

[0083]

[0084]

[0085]

[0086] Table 3

[0087] It can be seen from the above three tables that in the present invention, the disc and cavity structure is adopted, the purpose of which is to improve the utilization of liquid kinetic energy, reduce the loss in liquid flow, and thus improve efficiency. As a power transmission medium, it can start at full load, extend the starting time, and reduce the initial starting torque of the prime mover, so that the prime mover can use the maximum torque to start the working machine; during the transmission process, it can reduce the impact, isolate torsional vibration, and protect against overload, thereby achieving a low overload factor and high efficiency.

[0088] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A high-efficiency multi-stage hydraulic coupling, characterized in that: Connected between the motor and the working machine, the high-efficiency multi-stage hydraulic coupler includes a driving coupling, a metal diaphragm, a driven coupling, a rear auxiliary cavity, an oil filling plug, an end cover, a driving disc group, a connecting tube, a driven disc group, a main shaft, a housing and a fusible plug; The active coupling is mounted on the shaft extension of the motor, and the main shaft is mounted on the shaft extension of the working machine; the active coupling is connected to the driven coupling through the metal diaphragm, and the driven coupling is connected to 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 rear auxiliary cavity and the end cover. The connecting tube is connected to the end cover, and the outer shell is fixedly connected to the connecting tube to form a mounting cavity; the end cover is provided with an oil filling channel and the oil filling plug, and the outer shell is provided with an oil drain channel and the fusible plug; The active disc assembly is installed in the connecting tube and fixed to the connecting tube or the end cover; 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. The driven disc group is placed in the installation cavity, and the driven disc group is sleeved on the main shaft. The active disc group and the driven disc group form a working cavity.

2. The high-efficiency multi-stage fluid coupling according to claim 1, characterized in that: The active disc group includes a plurality of superimposed active discs, each of which is provided with a plurality of cavities; the driven disc group includes a plurality of superimposed driven discs, each of which is provided with a plurality of cavities.

3. The high-efficiency multi-stage fluid coupling according to claim 2, characterized in that: The structure of the cavity of each active disc is different from the structure of the cavity of each driven disc; wherein the structure of the cavity includes the number, shape and / or size of the cavity.

4. The high-efficiency multi-stage fluid coupling according to claim 3, characterized in that: The number of discs in the active disc group is N1, the number of discs in the driven disc group is N2, and the number of stages of the high-efficiency multi-stage hydraulic coupling is N=(N1+N2)-1.

5. The high-efficiency multi-stage fluid coupling according to claim 4, characterized in that: The single-stage transmission torque M of the high-efficiency multi-stage hydraulic coupling i (i=1,2,3,4,5),M i The total transmission torque is the sum of the transmission torques of the disc pumps of each stage, that is, M = ∑ (M1 + M2 + M3 + ...). The transmission power is P, where P = M × n ÷ 9550; P is the transmitted power (kW), n----the speed of the disc pump wheel (r / min).

6. The high-efficiency multi-stage fluid coupling according to claim 4, characterized in that: Each of the active discs includes 40-60 cavities, and each of the driven discs includes 40-60 cavities. The difference in the number of cavities between the active disc and the driven disc is 3-5.

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