Dual-mass jaw crusher

Abstract

The application relates to the technical field of crushers, and specifically discloses a double-mass jaw crusher, which comprises a rack, a fixed jaw plate, a movable jaw plate, a thrust plate, a main vibration spring, a first vibration isolation spring, a variable-frequency exciter, an exciter base and a plate spring. The fixed jaw plate is arranged on the rack, the movable jaw plate is arranged on the side of the thrust plate, the thrust plate is connected with the main vibration spring to form a lower mass body, and the lower mass body is located on the side of the variable-frequency exciter. The variable-frequency exciter is arranged on the exciter base through bolts, the exciter base is arranged on the first vibration isolation spring, the side edge of the exciter base is connected with the thrust plate through the plate spring to form an upper mass body, and the upper mass body is connected with the lower mass body into an integrated whole through the main vibration spring and the plate spring.

Description

Technical Field

[0001] This application relates to the field of crusher technology, specifically to a dual-mass jaw crusher. Background Technology

[0002] A jaw crusher is a device that uses mechanical force to crush large particles into smaller particles. It primarily works by periodically impacting, crushing, and shearing the material through the moving and fixed jaws. Traditional jaw crushers are inefficient, noisy, energy-intensive, have short lifespans, and are complex to install. Therefore, it is essential to design a high-efficiency, energy-saving, environmentally friendly, and easy-to-install dual-mass jaw crusher.

[0003] Currently used jaw crushers primarily use a motor that drives an eccentric shaft via a pulley, causing the moving jaw to reciprocate. The fixed and moving jaw plates are designed in a "V" shape, using compression and bending forces to crush materials. This mechanical force consumes a significant amount of electrical energy during the crushing process, especially when processing high-hardness materials, resulting in low energy efficiency. Secondly, critical components such as the eccentric shaft and bearings in existing jaw crushers require continuous lubrication. However, traditional manual lubrication or intermittent oil supply is prone to dry friction due to operational oversights, leading to unstable equipment operation, severe vibrations, fatigue damage, and high maintenance costs. This also hinders continuous production and shortens the equipment's lifespan. Thirdly, traditional jaw crushers have limited use of automated adjustment mechanisms, making it difficult to meet the real-time adjustment needs of continuous production. Fourthly, the high-speed rotation of the pulleys and flywheel during operation poses certain safety hazards. Summary of the Invention

[0004] The purpose of this application is to provide a dual-mass jaw crusher to solve the problems in the prior art.

[0005] To achieve the above objectives, this application provides a dual-mass jaw crusher, comprising: a frame, a fixed jaw plate, a movable jaw plate, a thrust plate, a main vibration spring, a first vibration isolation spring, a frequency converter, a vibrator seat, and a leaf spring, wherein...

[0006] The fixed jaw plate is mounted on the frame, and the movable jaw plate is mounted on the side of the thrust plate. The thrust plate is connected to the main vibration spring to form a lower mass, which is located on the side of the variable frequency exciter.

[0007] The variable frequency exciter is bolted to the exciter seat, which is mounted on the first vibration isolation spring. The side of the exciter seat is connected to the thrust plate via a leaf spring to form an upper mass. The upper mass is connected to the lower mass via the main vibration spring and the leaf spring.

[0008] Optionally, the variable frequency exciter includes: a vibration motor, an eccentric block, a counterweight, a frequency converter, and a protective cover. The vibration motor has output shafts at both ends, and the eccentric block and the variable force wheel adjustment device are respectively located at both ends of the output shaft of the vibration motor.

[0009] Optionally, the main vibration spring is a metal helical variable pitch spring, which is connected to the frame and thrust plate by bolts;

[0010] The main vibration spring includes a first spring and a second spring, which are arranged side by side.

[0011] Optionally, the lower and upper ends of the thrust plate are connected to the frame via the main vibration spring and the second vibration isolation spring, respectively.

[0012] Optionally, the first and second vibration isolation springs are rubber and metal composite springs, and the leaf springs are connected to the vibrator seat and the thrust plate by bolts;

[0013] The leaf spring includes a third spring and a fourth spring, which are arranged side by side.

[0014] Multiple first and second vibration isolation springs are arranged side by side.

[0015] Optionally, the frame is equipped with a modularly designed wear-resistant liner, which is connected to the frame by bolts.

[0016] Optionally, the movable jaw plate and the fixed jaw plate are designed to be symmetrical.

[0017] Optionally, the thrust plate includes a first plate, a second plate, a third plate, and a fourth plate. One end of the first plate is connected to the frame via the main vibration spring. The other end of the first plate is connected to one side of the second plate. The other side of the second plate is connected to the moving jaw plate. The upper end of the second plate is connected to one end of the third plate. The other end of the third plate is connected to the frame via the second vibration isolation spring. The fourth plate is disposed below the first plate and is connected to both the first and second plates.

[0018] Optionally, it further includes: a control cabinet, wherein the control cabinet is equipped with a PLC system, and the PLC system is electrically connected to the variable frequency exciter.

[0019] Optionally, it also includes a material monitor, which is electrically connected to the PLC system.

[0020] The embodiments of this application have the following advantages:

[0021] Compared with existing technologies, the dual-mass jaw crusher provided by the above technical solution connects the thrust plate to the frame via a main vibration spring and a second vibration isolation spring. During operation, the eccentric block of the vibrating motor rotates around the motor shaft to generate an eccentric excitation force. Under the action of the eccentric excitation force, the vibrator seat begins to vibrate, and drives the thrust plate to reciprocate through the main vibration spring. Materials of different sizes are subjected to compression and bending between the fixed jaw plate and the moving jaw plate, and the materials are eventually crushed. Due to the special arrangement of the upper mass, the thrust plate is pushed forward by its own gravity while vibrating. The material causes the thrust plate to oscillate at small angles in a cyclical manner under gravity, making the material crushed more thoroughly and greatly improving the crushing efficiency of the crusher.

[0022] Material enters the crushing inlet, is repeatedly struck and crushed by the jaw plates, and is gradually pulverized. Fine material is discharged from the lower outlet and enters the next process. During this process, the vibration generated by the frequency converter will not affect the frame, which to a certain extent extends the service life of the equipment.

[0023] The magnitude of the vibration frequency depends on the mass ratio of the supermass to the material. By controlling the mass ratio of the material, the vibration frequency can be controlled so that it is always lower than the natural frequency, thus forming a sensitive sub-resonance system.

[0024] When the material monitoring instrument detects changes in the material, the frequency converter changes its frequency accordingly, driving the vibrating motor to vibrate. Simultaneously, the material itself has a certain mass, pushing the thrust plate forward to some extent. Under gravity, the material causes the thrust plate to move backward. Meanwhile, the main vibration spring, which stores energy, is compressed under the centrifugal force of the vibrator and the inertial force of the material. When compressed to its limit, the stored energy is released exponentially, driving the jaw plate to move. Because the amplitude is magnified many times over, and a larger amplitude is obtained with a smaller excitation force, the power consumption of the equipment motor can be minimized. Furthermore, the use of the frequency converter achieves energy saving and meets the needs of real-time adjustment in continuous production.

[0025] Compared with traditional jaw crushers, this mass jaw crusher reduces the design of pulleys and flywheels, greatly improving the safety of equipment use. At the same time, the bolted connections between various components facilitate the installation and disassembly of the entire machine.

[0026] When the crusher starts and stops, the frequency of the frequency converter is controlled by the PLC system, which in turn controls the amplitude and vibration intensity, reducing the vibration during the start-up and shutdown of the crusher and lowering the failure rate of the crusher.

[0027] Through the interaction of the main spring, the first vibration isolation spring, and the leaf spring, the vibrator and the thrust plate will not cross the resonance zone when the equipment starts or stops, and will not generate resonance. This will not cause fatigue damage to the machine body, and the equipment can work smoothly, reducing the failure rate, extending the service life, and will not generate much noise pollution.

[0028] The frame is equipped with modular wear-resistant liners, which are impact-resistant, corrosion-resistant, and have a long service life. The moving jaw plate and the fixed jaw plate are symmetrically designed and can be reversed when worn, making replacement convenient and extending the service life of the equipment. Attached Figure Description

[0029] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0030] Figure 1 A three-dimensional structural schematic diagram of a dual-mass jaw crusher provided for at least one embodiment of this application;

[0031] Figure 2 A side sectional view of a dual-mass jaw crusher provided for at least one embodiment of this application;

[0032] Figure 3 A top view of a dual-mass jaw crusher provided for at least one embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the control cabinet of a dual-mass jaw crusher provided for at least one embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Vibration motor; 2. Eccentric block; 3. Exciter base; 4. Main vibration spring; 5. Frame; 61. First vibration isolation spring; 62. Second vibration isolation spring; 7. Thrust plate; 8. Leaf spring; 9. Moving jaw plate; 10. Fixed jaw plate; 11. Control cabinet; 41. First spring; 42. Second spring; 81. Third spring; 82. Fourth spring; 71. First plate; 72. Second plate; 73. Third plate; 74. Fourth plate. Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0039] This application provides a dual-mass jaw crusher, see reference. Figures 1 to 4 ,include:

[0040] The components include: frame 5, fixed jaw plate 10, moving jaw plate 9, thrust plate 7, main vibration spring 4, first vibration isolation spring 61, frequency converter, vibrator seat 3, leaf spring 8, material monitor, amplitude sensor, control cabinet 11, etc.

[0041] The fixed jaw plate 10 is bolted to the frame 5, and the movable jaw plate 9 is bolted to the side of the thrust plate 7. The thrust plate 7 is connected to the main vibration spring 4 to form a lower mass, which is located on the side of the frequency converter.

[0042] The variable frequency vibrator is bolted to the vibrator seat 3, which is mounted on the first vibration isolation spring 61. The side of the vibrator seat 3 is connected to the thrust plate 7 via a leaf spring 8 to form an upper mass. The upper mass is connected to the lower mass via the main vibration spring 4 and the leaf spring 8 to form a high-efficiency, energy-saving, environmentally friendly, and easy-to-install dual-mass jaw crusher.

[0043] In some embodiments, the variable frequency exciter includes: a vibration motor 1, an eccentric block 2, a counterweight, a frequency converter, and a protective cover. The vibration motor 1 has output shafts at both ends, and the eccentric block 2 and the variable force wheel adjustment device are respectively disposed at both ends of the output shaft of the vibration motor 1.

[0044] Specifically, by adjusting the power supply frequency through a frequency converter (e.g., 50Hz → 40Hz), the excitation force decreases by 36% when the motor speed n decreases by 20%. Specifically, at the rated speed of 1500rpm (50Hz), the excitation force F0 = m·e·(157 rad / s)², and when the speed is reduced to 1200rpm (40Hz), the excitation force F1 = m·e·(125.6 rad / s)² ≈ 0.64F0. By changing the speed, the amplitude and intensity of the crusher can be controlled.

[0045] In some embodiments, the main vibration spring 4 is a metal helical variable pitch spring, which is connected to the frame 5 and the thrust plate 7 by bolts;

[0046] The main vibration spring 4 includes a first spring 41 and a second spring 42, which are arranged side by side.

[0047] In some embodiments, the lower end and upper end of the thrust plate 7 are connected to the frame 5 via the main vibration spring 4 and the second vibration isolation spring 62, respectively.

[0048] In some embodiments, the first vibration isolation spring 61 and the second vibration isolation spring 62 are rubber and metal composite springs, and the leaf spring 8 is connected to the exciter seat 3 and the thrust plate 7 by bolts.

[0049] The leaf spring 8 includes a third spring 81 and a fourth spring 82, which are arranged side by side.

[0050] Multiple first vibration isolation springs 61 and second vibration isolation springs 62 are arranged side by side.

[0051] Specifically, the leaf spring 8 and the first and second vibration isolation springs 62 have good nonlinear characteristics, which can adapt to the non-uniformity of load changes in the vibration system, and have obvious vibration isolation effect, effectively reducing vibration and noise.

[0052] In some embodiments, the frame 5 is internally provided with modularly designed wear-resistant liners, which are bolted to the frame 5. The wear-resistant liners reduce noise and impact, and are easy to replace.

[0053] In some embodiments, the movable jaw plate 9 and the fixed jaw plate 10 are designed symmetrically. When worn, they can be reversed for continued use, greatly extending the equipment's lifespan.

[0054] In some embodiments, the thrust plate 7 includes a first plate 71, a second plate 72, a third plate 73, and a fourth plate 74. One end of the first plate 71 is connected to the frame 5 via the main vibration spring 4. The other end of the first plate 71 is connected to one side of the second plate 72. The other side of the second plate 72 is connected to the moving jaw plate 9. The upper end of the second plate 72 is connected to one end of the third plate 73. The other end of the third plate 73 is connected to the frame 5 via the second vibration isolation spring 62. The fourth plate 74 is disposed below the first plate 71 and is connected to the first plate 71 and the second plate 72 respectively.

[0055] In some embodiments, the system further includes a control cabinet 11, which is equipped with a PLC system and is electrically connected to the variable frequency exciter.

[0056] In some embodiments, the system further includes a material monitor, which is electrically connected to the PLC system.

[0057] The working principle of the dual-mass jaw crusher provided in this application is as follows:

[0058] The thrust plate 7 is connected to the frame 5 via the main vibration spring 4 and the second vibration isolation spring 62. During operation, the eccentric block 2 of the vibrating motor 1 rotates around the motor shaft to generate eccentric excitation force. Under the action of the eccentric excitation force, the vibrator seat 3 begins to vibrate, and drives the thrust plate 7 to reciprocate through the main vibration spring 4. Materials of different sizes are subjected to compression and bending between the fixed jaw plate 10 and the moving jaw plate 9, and the materials are eventually crushed. Due to the special arrangement of the upper mass, the thrust plate 7 is pushed forward by the gravity of the upper mass while vibrating. Under the gravity, the material causes the thrust plate 7 to oscillate at a small angle in a cycle, which makes the material crushed more thoroughly and greatly improves the crushing efficiency of the crusher.

[0059] The material enters the crushing inlet, is repeatedly struck and crushed by the jaw plates, and is gradually pulverized. The fine material is discharged from the lower discharge port and enters the next process. During this process, the vibration generated by the frequency converter will not affect the frame 5, which extends the service life of the equipment to a certain extent.

[0060] The magnitude of the vibration frequency depends on the mass ratio of the supermass to the material. By controlling the mass ratio of the material, the vibration frequency can be controlled so that it is always lower than the natural frequency, thus forming a sensitive sub-resonance system.

[0061] When the material monitor detects changes in the material, the frequency converter changes its frequency accordingly, driving the vibrating motor 1 to vibrate. Simultaneously, the material itself has a certain mass, pushing the thrust plate 7 forward to a certain extent. Under gravity, the material causes the thrust plate 7 to move backward. Meanwhile, the main vibration spring 4, which stores energy, is compressed under the centrifugal force of the vibrator and the inertial force of the material. When compressed to its limit, the energy stored in the main vibration spring 4 is released exponentially, thereby driving the jaw plate 9 to move. Because the amplitude is magnified exponentially, and a larger amplitude is obtained with a smaller excitation force, the power consumption of the equipment motor can be minimized. At the same time, the use of the frequency converter achieves energy saving and meets the needs of real-time adjustment in continuous production.

[0062] Compared with traditional jaw crushers, this mass jaw crusher reduces the design of pulleys and flywheels, greatly improving the safety of equipment use. At the same time, the bolted connections between various components facilitate the installation and disassembly of the entire machine.

[0063] When the crusher starts and stops, the frequency of the frequency converter is controlled by the PLC system, which in turn controls the amplitude and vibration intensity, reducing the vibration during the start-up and shutdown of the crusher and lowering the failure rate of the crusher.

[0064] Through the interaction of the main spring, the first vibration isolation spring 61, and the leaf spring 8, the vibrator and the thrust plate 7 will not cross the resonance zone when the equipment starts or stops, and will not generate resonance. This will not cause fatigue damage to the machine body, and the equipment can work smoothly, reducing the failure rate, extending the service life, and will not generate much noise pollution.

[0065] The frame 5 is equipped with modular wear-resistant liners, which are impact-resistant, corrosion-resistant and have a long service life. The moving jaw plate 9 and the fixed jaw plate 10 are symmetrically designed and can be reversed when worn, making them easy to replace and extending the service life of the equipment.

[0066] Note that, unless otherwise explicitly stated, all features disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by alternative features for achieving the same, equivalent, or similar purpose. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features. Where used, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments, the combination of which with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment constitutes yet another embodiment.

[0067] In the implementation of functions and steps, the corresponding functions and steps in the various embodiments may occur in a different order than those shown. For example, two consecutive functions and steps may actually be executed or implemented substantially in parallel, and they may sometimes be executed or implemented in reverse order, depending on the functions involved.

[0068] Although this application has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this application fall within the scope of protection claimed in this application.

Claims

1. A twin-pitman jaw crusher, characterized in that include: The components include: frame, fixed jaw plate, moving jaw plate, thrust plate, main vibration spring, first vibration isolation spring, variable frequency exciter, exciter base, and leaf spring. The fixed jaw plate is mounted on the frame, and the movable jaw plate is mounted on the side of the thrust plate. The thrust plate is connected to the main vibration spring to form a lower mass, which is located on the side of the variable frequency exciter. The variable frequency exciter is bolted to the exciter seat, which is mounted on the first vibration isolation spring. The side of the exciter seat is connected to the thrust plate via a leaf spring to form an upper mass. The upper mass is connected to the lower mass via the main vibration spring and the leaf spring.

2. The dual-mass jaw crusher according to claim 1, characterized in that, The variable frequency exciter includes: a vibration motor, an eccentric block, a counterweight, a frequency converter, and a protective cover. The vibration motor has output shafts at both ends, and the eccentric block and the variable force wheel adjustment device are respectively located at both ends of the output shaft of the vibration motor.

3. The dual-mass jaw crusher according to claim 1, characterized in that, The main vibration spring is a metal helical variable pitch spring, which is connected to the frame and thrust plate by bolts. The main vibration spring includes a first spring and a second spring, which are arranged side by side.

4. The dual-mass jaw crusher according to claim 1, characterized in that, The lower and upper ends of the thrust plate are connected to the frame via the main vibration spring and the second vibration isolation spring, respectively.

5. The dual-mass jaw crusher according to claim 4, characterized in that, The first and second vibration isolation springs are rubber and metal composite springs, and the leaf springs are connected to the exciter seat and the thrust plate by bolts; The leaf spring includes a third spring and a fourth spring, which are arranged side by side. Multiple first and second vibration isolation springs are arranged side by side.

6. The dual-mass jaw crusher according to claim 1, characterized in that, The frame is equipped with modular wear-resistant liners, which are connected to the frame by bolts.

7. The dual-mass jaw crusher according to claim 1, characterized in that, The movable jaw plate and the fixed jaw plate are designed symmetrically.

8. The dual-mass jaw crusher according to claim 4, characterized in that, The thrust plate includes a first plate, a second plate, a third plate, and a fourth plate. One end of the first plate is connected to the frame via the main vibration spring. The other end of the first plate is connected to one side of the second plate. The other side of the second plate is connected to the moving jaw plate. The upper end of the second plate is connected to one end of the third plate. The other end of the third plate is connected to the frame via the second vibration isolation spring. The fourth plate is located below the first plate and is connected to both the first and second plates.

9. The dual-mass jaw crusher according to claim 1, characterized in that, Also includes: A control cabinet, which contains a PLC system, and the PLC system is electrically connected to the variable frequency vibrator.

10. The dual-mass jaw crusher according to claim 9, characterized in that, Also includes: A material monitoring instrument, which is electrically connected to the PLC system.

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