Vibrating screen anti-resonance bidirectional damping device

Abstract

The utility model relates to an anti-resonance bidirectional damping device of a vibrating screen. The anti-resonance bidirectional damping device comprises an upper spring seat, a lower spring seat and a supporting spring for connecting the upper spring seat and the lower spring seat, an outer cylinder is fixedly mounted on the lower spring seat, and an elastic element, a baffle and an elastic element are sequentially stacked in the outer cylinder from top to bottom; a through hole is formed in a bottom plate of the upper spring seat, a push-pull screw rod is movably embedded in the through hole, the bottom of the push-pull screw rod extends into the outer cylinder and the upper-layer elastic element and then is fixedly connected with the baffle, and an upper limiting seat and a lower limiting seat which are arranged at a fixed interval are arranged on the upper portion of the push-pull screw rod. And the upper limiting seat and the lower limiting seat are respectively positioned above and below the upper spring seat bottom plate. The vibration amplitude of the vibration screen passing through a resonance area can be effectively restrained, the time of passing through the resonance area is greatly shortened, the vibration screen can rapidly enter a normal working or shutdown state, and the service life of the screening machine and the service life of a bearing foundation are prolonged.

Description

Technical Field

[0001] This utility model relates to the field of vibrating screen technology, and in particular to a damping device with anti-resonance bidirectional action for vibrating screens. Background Technology

[0002] Currently, the most widely used support springs on vibrating screens are metal helical springs because they have good vibration damping effect, low manufacturing cost, and mature technology. However, when metal helical springs are used as the support and vibration damping components of a vibrating screen, the amplitude of the vibration passing through the resonance zone is too large (5 to 7 times that of normal operation) when the vibrating screen starts or stops, and the duration is long. This causes the foundation supporting the vibrating screen to bear excessive dynamic load for a long time, which is detrimental to the safety of the screen itself and the load-bearing foundation.

[0003] Existing damping devices only place a rubber block below the upper spring seat of the vibrating screen to provide a unidirectional damping reaction force to the upper spring seat. This has limited effect on suppressing the amplitude of the vibrating screen in the resonance zone, and the duration of the resonance zone is still relatively long, posing a significant safety risk to the screen itself and its supporting foundation.

[0004] Therefore, there is an urgent need for a bidirectional anti-resonance damping device for vibrating screens that can effectively suppress the amplitude of the vibrating screen passing through the resonance zone and greatly shorten the time of passing through the resonance zone, so that the vibrating screen can quickly enter the normal working or shutdown state and improve the service life of the screen and the load-bearing foundation. Summary of the Invention

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a bidirectional damping device for anti-resonance of a vibrating screen that can effectively suppress the amplitude of the vibrating screen passing through the resonance zone and greatly shorten the time of passing through the resonance zone, so that the vibrating screen can quickly enter the normal working or shutdown state and improve the working life of the screen itself and the load-bearing foundation.

[0006] The purpose of this utility model is achieved as follows:

[0007] A bidirectional damping device for anti-resonance of a vibrating screen includes an upper spring seat, a lower spring seat, and a supporting spring connecting the upper and lower spring seats. An outer cylinder is fixedly mounted on the lower spring seat, and elastic elements, baffles, and elastic elements are stacked sequentially from top to bottom inside the outer cylinder. A through hole is provided on the bottom plate of the upper spring seat, and a push-pull screw is movably embedded in the through hole. The bottom of the push-pull screw extends into the outer cylinder and the upper elastic element and is fixedly connected to the baffle. An upper limit seat and a lower limit seat with a fixed spacing are provided on the upper part of the push-pull screw, and the upper limit seat and the lower limit seat are located above and below the bottom plate of the upper spring seat, respectively.

[0008] Furthermore, the elastic element is any one of a metal helical spring, a composite spring, a rubber spring, or an air spring.

[0009] Furthermore, the distance between the upper limit seat and the lower limit seat is equal to the working amplitude of the screening machine.

[0010] Furthermore, the gaps between the upper limit seat, the lower limit seat, and the upper spring seat base plate are equal.

[0011] Furthermore, the upper limit seat and the lower limit seat are connected to the push-pull screw via a threaded structure.

[0012] Furthermore, the outer cylinder is vertically fixed to the top plate of the lower spring seat via a threaded seat.

[0013] Furthermore, the two ends of the support spring are fixed in position by a spindle mounted on the upper spring seat and the lower spring seat.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention connects a push-pull screw and an outer cylinder between the upper and lower spring seats, respectively. An elastic element with a sandwich structure and a baffle are installed inside the outer cylinder. An upper limit seat and a lower limit seat are installed on the push-pull screw. The two elastic elements dampen and limit the vibration of the upper spring seat in the upward and downward directions, respectively. This effectively suppresses the amplitude range of the upper spring seat passing through the resonance zone, greatly shortens the time the upper spring seat passes through the resonance zone, and improves the service life of the vibrating screen itself and the supporting foundation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a bidirectional damping device for anti-resonance of a vibrating screen according to the present invention.

[0017] Figure 2 This is a left view of a vibrating screen anti-resonance bidirectional damping device according to the present invention.

[0018] in:

[0019] Upper spring seat 1, lower spring seat 2, support spring 3, spindle 4, outer cylinder 5, elastic element 6, push-pull screw 7, upper limit seat 8, lower limit seat 9, screw seat 10, baffle 11. Detailed Implementation

[0020] See Figures 1-2 The present invention relates to a bidirectional damping device for anti-resonance of a vibrating screen, comprising an upper spring seat 1, a lower spring seat 2, and a support spring 3 connecting the upper spring seat 1 and the lower spring seat 2; the two ends of the support spring 3 are fixed in position by a spindle 4 installed on the upper spring seat 1 and the lower spring seat 2.

[0021] The outer cylinder 5 is vertically fixed on the top plate of the lower spring seat 2 by the screw seat 10. The elastic element 6, the baffle 11 and the elastic element 6 are stacked in the outer cylinder 5 from top to bottom, that is, the baffle 11 is sandwiched between the two elastic elements 6 to form a sandwich structure.

[0022] The elastic element 6 serves a damping function. In this embodiment, it specifically refers to a damping spring used to suppress the amplitude of the vibrating screen when it passes through the resonance zone. It can be any one of a metal helical spring, a composite spring, a rubber spring, or an air spring.

[0023] The bottom plate of the upper spring seat 1 has a through hole, and a push-pull screw 7 is movably embedded in the through hole. The bottom of the push-pull screw 7 extends into the outer cylinder 5 and the upper elastic element 6 and is fixedly connected to the baffle 11. The upper part of the push-pull screw 7 is provided with an upper limit seat 8 and a lower limit seat 9 with a fixed distance through a threaded structure. The upper limit seat 8 and the lower limit seat 9 are located above and below the bottom plate of the upper spring seat 1, respectively.

[0024] The distance between the upper limit seat 8 and the lower limit seat 9 is equal to the working amplitude of the screen machine. That is, the vertical amplitude range of the upper spring seat 1 base plate in the working state is equal to the distance between the upper limit seat 8 and the lower limit seat 9. The gap between the upper limit seat 8, the lower limit seat 9 and the upper spring seat 1 base plate is equal. That is, when the upper spring seat 1 base plate vibrates upward or downward, it does not exceed the position of the upper limit seat 8 and the lower limit seat 9. In other words, the upper spring seat 1 base plate does not generate pushing or pulling force on the upper limit seat 8 and the lower limit seat 9.

[0025] When the vibrating screen is working normally, the screen body is supported by the support spring 3. During normal operation, the upper spring seat 1 does not exert a pushing or pulling force on the push-pull screw 7, so the damping spring does not participate in the work, ensuring that the normal operation of the screen is not affected. When the vibrating screen starts or stops, it will pass through the resonance zone. At this time, the amplitude is greater than the normal operating amplitude. The upper spring seat 1 vibrates upward to push the upper limit seat 8 upward and vibrates downward to push the lower limit seat 9 downward, which in turn drives the push-pull screw 7 to move up and down. When the push screw 7 moves up and down, the upper and lower damping springs generate bidirectional reaction forces, thereby effectively suppressing the amplitude of the vibrating screen passing through the resonance zone (only about 1.5 times the working amplitude), greatly shortening the time to pass through the resonance zone. Compared with the traditional one-way reaction damping device, the screen can quickly enter the normal operation or shutdown state, thereby improving the service life of the screen itself and the load-bearing foundation.

[0026] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A bidirectional damping device for anti-resonance of a vibrating screen, comprising an upper spring seat (1), a lower spring seat (2), and a support spring (3) connecting the upper spring seat (1) and the lower spring seat (2), characterized in that: The lower spring seat (2) is fixedly fitted with an outer cylinder (5), and the elastic element (6), baffle (11) and elastic element (6) are stacked in the outer cylinder (5) from top to bottom. The bottom plate of the upper spring seat (1) is provided with a through hole, and a push-pull screw (7) is movably embedded in the through hole. The bottom of the push-pull screw (7) extends into the outer cylinder (5) and the upper elastic element (6) and is fixedly connected to the baffle (11). The upper part of the push-pull screw (7) is provided with an upper limit seat (8) and a lower limit seat (9) with a fixed distance. The upper limit seat (8) and the lower limit seat (9) are located above and below the bottom plate of the upper spring seat (1), respectively.

2. The anti-resonance bidirectional damping device for a vibrating screen according to claim 1, characterized in that: The elastic element (6) is any one of a metal helical spring, a composite spring, a rubber spring, or an air spring.

3. The anti-resonance bidirectional damping device for a vibrating screen according to claim 1, characterized in that: The distance between the upper limit seat (8) and the lower limit seat (9) is equal to the working amplitude of the screening machine.

4. The anti-resonance bidirectional damping device for a vibrating screen according to claim 1, characterized in that: The gaps between the upper limit seat (8), the lower limit seat (9) and the base plate of the upper spring seat (1) are equal.

5. The anti-resonance bidirectional damping device for a vibrating screen according to claim 1, characterized in that: The upper limit seat (8) and the lower limit seat (9) are connected to the push-pull screw (7) by a threaded structure.

6. The anti-resonance bidirectional damping device for a vibrating screen according to claim 1, characterized in that: The outer cylinder (5) is vertically fixed to the top plate of the lower spring seat (2) via the thread seat (10).

7. The anti-resonance bidirectional damping device for a vibrating screen according to claim 1, characterized in that: The two ends of the support spring (3) are fixed in position by a spindle (4) mounted on the upper spring seat (1) and the lower spring seat (2).

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