Large-specification torque-limiting fluid coupling
By designing a large-scale torque-limited hydraulic coupling, using pump wheel sets and turbine sets to form a working chamber, and using the kinetic energy of working fluid to transmit torque, the problems of starting impact and vibration of existing torque-limited hydraulic couplings in large-scale equipment are solved, achieving safe and efficient equipment operation and life extension.
Patent Information
- Application Number
- CN202422343171.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The existing limited-rhythmic hydraulic couplings are difficult to be suitable for large-scale or heavy-load large-scale production equipment. They have impact and vibration during the starting process and cannot effectively isolate torque, resulting in a shortening of the equipment service life.
A large-scale torque-limited hydraulic coupling is designed, using the pump wheel set and the turbine set to cooperate with each other to form a working cavity, use the kinetic energy of the working liquid to transmit torque, and connect the motor and the working machine through a diaphragm coupling to reduce impact and vibration during the starting process and prevent power overload.
It realizes safe operation of large-scale, high-speed, and high-power working machines, extends the service life of the equipment, reduces starting current, reduces equipment maintenance costs, improves the starting capacity of the motor, balances load, and saves energy.
Smart Images
Figure CN223164963U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of torque-limiting fluid couplings, and particularly refers to a large-size torque-limiting fluid coupling. Background Art
[0002] With the rapid development of the national economy, large-scale production equipment such as high-speed and heavy-load ones has been developed and applied, which also requires that hydrodynamic transmission products should match the corresponding production equipment.
[0003] Among the existing fluid coupling products in China, especially the torque-limiting fluid couplings, their impellers (pump impellers and turbine impellers) are all integrally produced and formed, and the performance of the impellers is thus determined. However, the impellers of the existing fluid couplings are restricted by their own structures, manufacturing processes and materials, making it more difficult to design and manufacture large-size impellers.
[0004] That is, the torque-limiting fluid couplings in the prior art cannot be applied to large-scale production equipment such as large-size or heavy-load ones, so the existing torque-limiting fluid couplings have certain limitations in use. Content of the Utility Model
[0005] The invention purpose of the utility model is: to solve the problems existing in the prior art, the utility model provides a large-size torque-limiting fluid coupling.
[0006] To solve the problems existing in the prior art, the utility model adopts the following technical solutions:
[0007] A large-size torque-limiting fluid coupling is used in cooperation with a motor and a working machine. The large-size torque-limiting fluid coupling includes a fluid coupling body, a coupling, a pump impeller group and a turbine impeller group;
[0008] The fluid coupling body includes a rear auxiliary cavity, a housing connected to the rear auxiliary cavity, and a coupling main shaft connected to the housing. A containing space is formed inside the housing;
[0009] The fluid coupling body is respectively connected to the motor and the working machine through the coupling and the coupling main shaft;
[0010] The pump impeller group and the turbine impeller group are arranged inside the containing space. The pump impeller group is connected to the coupling through the rear auxiliary cavity; the turbine impeller group is arranged opposite to the pump impeller group, and there is a gap between the turbine impeller group and the pump impeller group. The gap forms a working cavity, and working fluid is accumulated inside the working cavity;
[0011] The motor drives the rear auxiliary cavity to rotate through the coupling, the rear auxiliary cavity drives the pump impeller group to rotate, the pump impeller group drives the turbine impeller group to rotate by pushing the working fluid, and the rotation of the turbine impeller group drives the working machine to work.
[0012] As an improvement to the technical solution of the large-size torque-limiting hydraulic coupling of the present utility model, the pump wheel group includes a basic pump wheel and a functional pump wheel, and the turbine group includes a basic turbine and a functional turbine;
[0013] The basic pump wheel, the functional pump wheel, the basic turbine, and the functional turbine are all provided with multiple blades, and each blade is a radially vertical blade, and the working fluid is pushed to flow through the multiple radially vertical blades.
[0014] As an improvement to the technical solution of the large-size torque-limiting hydraulic coupling of the present utility model, the number of blades of the turbine group is greater than the number of blades of the pump wheel group.
[0015] As an improvement to the technical solution of the large-size torque-limiting hydraulic coupling of the present utility model, the clearance between the end faces of the functional pump wheel and the functional turbine is 5-6 mm, and the basic pump wheel, the functional pump wheel, the basic turbine, and the functional turbine form the working chamber.
[0016] As an improvement to the technical solution of the large-size torque-limiting hydraulic coupling of the present utility model, the flow channels of the functional pump wheel and the functional turbine are arranged coaxially.
[0017] As an improvement to the technical solution of the large-size torque-limiting hydraulic coupling of the present utility model, the rear auxiliary chamber is respectively hermetically connected to the coupling and the housing.
[0018] As an improvement to the technical solution of the large-size torque-limiting hydraulic coupling of the present utility model, the coupling is a diaphragm coupling.
[0019] As an improvement to the technical solution of the large-size torque-limiting hydraulic coupling of the present utility model, the coupling includes a driving coupling joint, a first metal diaphragm, an intermediate joint, a second metal diaphragm, and a driven connecting disc; the driven connecting disc is connected to the rear auxiliary chamber.
[0020] Advantages of the present utility model:
[0021] In the present utility model, through the mutual cooperation of the pump wheel group and the turbine group, a working chamber is formed between the pump wheel group and the turbine group, so that the present utility model reduces the impact and vibration during the starting process, isolates the torque, prevents power overload, and at the same time has a high operating speed, can be used at the maximum efficiency and operate safely; moreover, it meets the working requirements of large-inertia, high-speed, and high-power working machines, and can extend the service life of the equipment when used in a supporting manner. Description of the drawings
[0022] Figure 1 is a schematic structural diagram of the present utility model;
[0023] Figure 2 This is the usage state diagram of the present utility model.
[0024] Explanation of reference numerals: 1 - driving coupling; 2 - first metal diaphragm; 3 - intermediate section; 4 - second metal diaphragm; 5 - driven connecting disc; 6 - rear auxiliary cavity; 9 - basic pump impeller; 10 - oil filling plug; 11 - functional pump impeller; 12 - functional turbine; 13 - basic turbine; 14 - fusible plug; 15 - housing; 2-1 - motor; 2-2 - large - specification torque - limiting fluid coupling; 2-3 - working machine. Specific embodiments
[0025] To make the invention purpose, technical solution and beneficial effects of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.
[0026] As Figure 1 and Figure 2 shown, a large - specification torque - limiting fluid coupling is used in cooperation with the motor 2-1 and the working machine 2-3. The large - specification torque - limiting fluid coupling 2-2 includes a fluid coupling body, a coupling, a pump impeller group and a turbine group; the fluid coupling body includes a rear auxiliary cavity 6, a housing 15 connected to the rear auxiliary cavity 6 and a coupling main shaft connected to the housing 15. A containing space is formed inside the housing 15; the fluid coupling main body is connected to the motor 2-1 and the working machine 2-3 through the coupling and the coupling main shaft respectively;
[0027] The pump impeller group and the turbine group are arranged in the containing space. The pump impeller group is connected to the coupling through the rear auxiliary cavity 6; the turbine group is arranged opposite to the pump impeller group, and there is a gap between the turbine group and the pump impeller group. The gap forms a working cavity, and working fluid is accumulated in the working cavity;
[0028] The motor 2-1 drives the rear auxiliary cavity 6 to rotate through the coupling, the rear auxiliary cavity 6 drives the pump impeller group to rotate, the pump impeller group drives the turbine group to rotate by pushing the working fluid, and the rotation of the turbine group drives the working machine 2-3 to work.
[0029] The utility model is applicable to torque-limiting hydraulic couplings with large specifications, heavy loads, and special transmission characteristics. It has an effective diameter of the impeller circulation circle reaching 1550 - 2350 mm; the overall power transmission can reach 1800 KW - 7600 KW; during implementation, the manufacturing, processing, and assembly processes of the impeller group (basic pump impeller 9 and functional pump impeller 11, basic turbine 13 and functional turbine 12) are optimized. Through the mutual cooperation of the pump impeller group and the turbine group, a working chamber is formed between the pump impeller group and the turbine group, enabling the utility model to reduce the impact and vibration during the starting process, isolate torque, prevent power overload, and at the same time have a high operating speed, be able to operate at the maximum efficiency and safely; moreover, it meets the working requirements of large-inertia, high-speed, and high-power working machines 2-3, and can extend the service life of the equipment when used in a supporting manner. In addition, the utility model is mainly used in supporting high-speed, heavy-load, and large-specification equipment, can achieve no-load starting, extend the starting time, reduce the starting current, improve the starting ability of the motor 2-1, reduce impact and vibration, prevent power overload, extend the mechanical service life, balance the load of multiple machines, reduce the impact current on the power grid, save energy, reduce equipment maintenance costs, and extend the service life of the working machine 2-3, etc.
[0030] In some embodiments of the utility model, the pump impeller group includes a basic pump impeller 9 and a functional pump impeller 11, and the turbine group includes a basic turbine 13 and a functional turbine 12; the basic pump impeller 9, functional pump impeller 11, basic turbine 13, and functional turbine 12 are all provided with multiple blades, and each blade is a radially vertical blade, and the working fluid is pushed to flow through the multiple radially vertical blades.
[0031] The basic pump impeller 9 receives the input of torque, and the functional pump impeller 11 converts most of the torque into liquid energy to achieve energy conversion. The rated pump torque coefficient λB is determined by the functional pump impeller 11, which is easy to control the performance of the hydraulic coupling. The turbine group is composed of two parts: the basic turbine 13 and the functional turbine 12: the functional turbine 12 converts the liquid energy into mechanical energy to achieve energy conversion, and the basic turbine 13 transmits the torque to the main shaft to drive the working machine 2-3 to do work. The functional turbine 12 determines the torque transmission performance of the hydraulic coupling and can achieve overload protection.
[0032] Specifically, a large-specification torque-limiting hydraulic coupling is a hydraulic element that uses liquid as the working medium and connects the prime mover and the working machine 2-3. It is used in cooperation with the motor 2-1 and the working machine 2-3, and is particularly suitable for large-specification and high-speed hydraulic couplings, as well as torque-limiting hydraulic couplings with special performance requirements, which can enable the hydraulic coupling to better match the working machine 2-3 and maximize the advantages of hydraulic transmission.
[0033] When the utility model is in use, working fluid is filled in the working chamber, and the main shaft of the motor 2-1 is connected to the coupling. When the main shaft of the motor 2-1 rotates, the hydraulic coupling body and the pump wheel group are driven to rotate through the coupling. The blades in the pump wheel group have a driving effect on the working fluid. Moreover, when the hydraulic coupling body rotates, the working fluid in its working chamber also has centrifugal force, that is, the working fluid in the working chamber will be subject to the dual effects of centrifugal force and the driving of the pump wheel blades.
[0034] The working fluid is accelerated and pressurized from the inner edge of the impeller assembly to the outer edge of the functional impeller 11. This increases the fluid's kinetic moment (primarily kinetic energy). The impeller assembly converts the mechanical energy input from motor 2-1 into kinetic energy. As the working fluid, imbued with this kinetic energy, flows from functional impeller 11 toward functional turbine 12 in the opposing turbine assembly, it impacts the blades of functional turbine 12, causing it to rotate in the same direction as base impellers 9 and 11. Simultaneously, the fluid flows through functional turbine 12 and into base turbine 13, driving it to rotate in the same direction. This kinetic energy is then converted back into mechanical energy, causing base turbine 13 to rotate and drive working engine 2-3 to produce work. Having released its kinetic energy, the working fluid flows out of the turbine assembly and re-enters the inner edge of functional impeller 11, beginning the next cycle.
[0035] In this way, the working fluid circulates continuously between the inner edge of the functional pump impeller 11, the outer edges of the basic pump impeller 9 and functional pump impeller 11, and the functional turbine 12 and basic turbine 13. The basic turbine 13 drives the main shaft of the working machine 2-3 and transmits power to the working machine 2-3. Thus, the input and output of the hydraulic coupling are flexibly connected by the kinetic energy of the fluid without direct mechanical contact. This design, when used with high-speed, heavy-load, and large-scale equipment, can achieve no-load starting, extend starting time, reduce starting current, improve the starting capability of the motor 2-1, reduce shock and vibration, prevent power overload, extend the service life of the machine, balance the load of multiple machines, reduce inrush current in the power grid, save energy, reduce equipment maintenance costs, and extend the service life of the working machine 2-3.
[0036] In some embodiments of the present invention, the number of blades of the turbine assembly is greater than the number of blades of the pump assembly.
[0037] As an embodiment of this embodiment, 60 to 69 radially vertical blades are provided in each of the basic pump impeller 9, the functional pump impeller 11, the functional turbine 12, and the basic turbine 13. Among them, the number of blades of the basic pump impeller 9 and the functional pump impeller 11 is the same, and the number of blades of the basic turbine 13 and the functional turbine 12 is the same. The number of blades of the basic pump impeller 9 and the functional pump impeller 11 in the pump impeller group differs from the number of blades of the basic turbine 13 and the functional turbine 12 in the turbine group by 2 to 3 pieces. This can make the efficiency between the turbine group and the pump impeller group inconsistent, and then ensure the pushing effect of the pump impeller group on the working fluid, which has a certain difference from the pushing effect of the working fluid on the turbine group.
[0038] Furthermore, the clearance between the end faces of the functional pump impeller 11 and the functional turbine 12 is 5 to 6 mm. The basic pump impeller 9, the functional pump impeller 11, the basic turbine 13, and the functional turbine 12 form a working chamber of the hydraulic coupling, and an appropriate amount of working fluid is filled in the chamber to transmit power.
[0039] As an embodiment of this embodiment, the flow channels of the functional pump impeller 11 and the functional turbine 12 are arranged coaxially. Thereby reducing the unbalance generated by the rotation of the liquid flow, and thus ensuring the dynamic balance accuracy of the hydraulic coupling.
[0040] In some embodiments of the present invention, the hydraulic coupling body includes a housing 15 and a rear auxiliary chamber 6; the rear auxiliary chamber 6 is hermetically connected to the coupling and the housing 15 respectively.
[0041] Specifically, there are appropriate blades on the rear auxiliary chamber 6 to increase the pressure of the liquid flowing from the rear auxiliary chamber 6 into the working chamber. At the same time, the rear auxiliary chamber 6 absorbs the liquid flowing out of the working chamber when the hydraulic coupling is overloaded. When the amount of working fluid in the working chamber changes, the total amount of liquid energy changes accordingly, thereby changing the transmitted torque.
[0042] In some embodiments of the present invention, the coupling is a diaphragm coupling.
[0043] Specifically, in the present invention, the coupling can be a gear coupling, an elastic coupling, a universal coupling, a plum blossom elastic coupling, an elastic pin gear coupling or a diaphragm coupling. Since the diaphragm coupling can compensate for the axial, radial and angular offsets caused by manufacturing errors, installation errors, bearing deformation and temperature rise changes between the prime mover and the driven machine. And its diaphragm coupling has a compact structure, does not require lubricating oil, has a long service life, and has no rotational clearance, so the diaphragm coupling is preferred.
[0044] Further, the diaphragm coupling includes a driving coupling 1, a first metal diaphragm 2, an intermediate section 3, a second metal diaphragm 4, and a driven connection disk 5; the driven connection disk 5 is connected to the rear auxiliary cavity 6. The driving coupling 1, the first metal diaphragm 2, the intermediate section 3, the second metal diaphragm 4, and the driven connection disk 5 form a diaphragm coupling, which has the characteristics of high working speed, large transmitted torque, simple structure, and long service life.
[0045] In some embodiments of the present invention, the hydraulic coupling body further includes an oil filling plug 10 and a fusible plug 14 disposed adjacent to the oil filling plug 10. When the oil filling plug 10 and the fusible plug 14 are in the pulled-out state, the working cavity is in communication with the outside. During use, remove one oil filling plug 10 and an adjacent fusible plug 14, and inject an appropriate amount of working fluid into the working cavity of the hydraulic coupling (the maximum filling amount does not exceed 80% of the maximum cavity volume), and the hydraulic coupling will have the ability to transmit torque.
[0046] In the present invention, the working fluid can ensure the flexible combination of the basic pump impeller 9 at the driving end, the functional pump impeller 11, the basic turbine 13 at the driven shaft, and the functional turbine 12, and is the medium for the hydraulic coupling to transmit torque. For the same hydraulic coupling, the amount of the filled working fluid directly affects the magnitude of the torque transmitted by the hydraulic coupling. The basic rule is that within the specified filling amount range, the more the filling amount, the greater the torque transmitted by the hydraulic coupling. When the transmitted torque is constant, the more the filling amount, the higher the efficiency. By using different filling amounts, the same specification of hydraulic coupling can be power-matched with the motor 2-1 within the transmitted power range to meet the requirements of different working machines 2-3.
[0047] It should be noted here that the motor 2-1 and the working machine 2-3 are working components used in conjunction with the present invention, and the motor 2-1 and the working machine 2-3 are existing motors 2-1 and working machines 2-3, and their internal structures are as in the conventional technology, which will not be elaborated here.
[0048] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
Claims
1. A large-size torque-limiting fluid coupling, used in conjunction with an electric motor and a working machine, characterized in that: The large-size torque-limiting fluid coupling includes a fluid coupling body, a coupling, a pump wheel group, and a turbine group; The fluid coupling body includes a rear auxiliary cavity, a housing connected to the rear auxiliary cavity, and a coupling main shaft connected to the housing. An accommodation space is formed inside the housing; The fluid coupling main body is connected to the motor and the working machine through the coupling and the coupling main shaft respectively; The pump wheel group and the turbine group are arranged in the accommodation space. The pump wheel group is connected to the coupling through the rear auxiliary cavity; the turbine group is arranged opposite to the pump wheel group, and there is a gap between the turbine group and the pump wheel group. The gap forms a working cavity, and the working fluid is accumulated in the working cavity; The motor drives the rear auxiliary cavity to rotate through the coupling, the rear auxiliary cavity drives the pump wheel group to rotate, the pump wheel group drives the turbine group to rotate by pushing the working fluid, and the rotation of the turbine group drives the working machine to work.
2. The large-size torque-limiting hydraulic coupling according to claim 1, characterized in that The pump wheel group includes a basic pump wheel and a functional pump wheel, and the turbine group includes a basic turbine and a functional turbine; The basic pump wheel, the functional pump wheel, the basic turbine, and the functional turbine are all provided with a plurality of blades. Each blade is a radially vertical blade, and the plurality of radially vertical blades are used to push the working fluid to flow.
3. The large-size torque-limited fluid coupling according to claim 2, characterized in that: The number of blades of the turbine group is greater than the number of blades of the pump wheel group.
4. The large-size torque-limiting hydraulic coupling according to claim 2, wherein, The gap between the end faces of the functional pump wheel and the functional turbine is 5-6 mm. The basic pump wheel, the functional pump wheel, the basic turbine, and the functional turbine form the working cavity.
5. The large-sized torque-limiting hydraulic coupling according to claim 2, characterized in that, The flow channels of the functional pump wheel and the functional turbine are arranged coaxially.
6. The large-size torque-limiting hydraulic coupling according to claim 1, characterized in that, The rear auxiliary cavity is hermetically connected to the coupling and the housing respectively.
7. The large-size torque-limited fluid coupling according to any one of claims 1 to 6, characterized in that: The coupling is a diaphragm coupling.
8. The large-size torque-limited fluid coupling according to claim 7, characterized in that: The diaphragm coupling includes a driving coupling joint, a first metal diaphragm, an intermediate joint, a second metal diaphragm, and a driven connecting disc; the driven connecting disc is connected to the rear auxiliary cavity.