Large compound vibrating screen with secondary vibration isolation device

Abstract

The utility model relates to a large compound vibrating screen with a secondary vibration isolation device, which comprises a screen body and a support body, the screen body comprises more than two screen surfaces and is a vibration-participating body, and the support body is a non-vibration-participating body; the secondary vibration isolation device comprises a secondary vibration isolation spring, an upper supporting plate and a lower supporting plate, the upper supporting plate is fixedly connected with the bottom of the supporting body, the lower supporting plate is fixedly connected with a foundation, the upper supporting plate and the lower supporting plate are oppositely arranged, and the secondary vibration isolation spring is arranged between the upper supporting plate and the lower supporting plate. The structure of an existing large compound vibrating screen is not changed, a large-mass vibration isolation frame and a complex vibration reduction mechanism do not exist, only the secondary vibration isolation device is additionally arranged at the bottom of the vibrating screen, and implementation is easy. In addition, through scientific theoretical calculation, a secondary vibration isolation spring with proper parameters is selected, a good vibration isolation effect can be achieved, the impact dynamic load of the large compound vibrating screen on a foundation is greatly reduced, and equipment operation is more reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibrating screen, in particular to a large compound vibrating screen with secondary vibration isolation device. BACKGROUND

[0002] The large compound vibrating screen refers to a compound vibrating screen with a screen width of 2.5 meters or more, a screen length of 6 meters or more, and a vibrating mass of 15 tons or more. The compound vibrating screen is a multi-layer vibrating screen for simultaneously screening materials on multiple screen surfaces, which is equivalent to two conventional vibrating screen frames stacked together to form one screen frame. The compound vibrating screen has the advantages of simple maintenance, compact structure, large processing capacity, and good environmental protection performance. However, the single support point of the large compound vibrating screen has a working dynamic load of 2650N or more on the foundation, and a maximum dynamic load of 18550N or more (7 times the working dynamic load), which requires a very high foundation strength. Otherwise, the foundation resonance will be caused, which not only affects the operation of other equipment on the same foundation surface, but also has a serious destructive impact on the foundation, posing a huge safety hazard. The existing large compound vibrating screen does not have a secondary vibration isolation device, and the damping mechanism on other screening equipment has a complex structure. When applied to the large compound vibrating screen, not only the existing structure of the compound vibrating screen needs to be modified, but also the damping effect is poor. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a large compound vibrating screen with secondary vibration isolation device to overcome the deficiency of prior art, and the secondary vibration isolation device is simply added to the compound vibrating screen, so that the secondary vibration isolation of the large compound vibrating screen is realized, and the impact dynamic load of the large compound vibrating screen on the foundation is greatly reduced.

[0004] According to the utility model discloses a large compound vibrating screen with secondary vibration isolation device, it includes: large compound vibrating screen, including screen body and support body, the screen body includes two or more screen surfaces, and is the vibrating body, the support body is the non-vibrating body, secondary vibration isolation device includes secondary vibration isolation spring, upper support plate and lower support plate, the upper support plate is fixedly connected with the bottom of support body, and the lower support plate is fixedly connected with the foundation, the upper support plate and lower support plate are oppositely arranged, and the secondary vibration isolation spring is arranged between the upper support plate and lower support plate.

[0005] In one embodiment, the secondary vibration isolation spring is a rubber spring.

[0006] In one embodiment, the number of secondary vibration isolation springs between each group of upper support plates and lower support plates is the same and more than one.

[0007] In one embodiment, the number of upper support plates and lower support plates is four, and they are evenly arranged below the support body.

[0008] In one of the embodiments, the support body and the upper support plate are connected by bolts.

[0009] Compared with the prior art, the utility model has the advantages of:

[0010] (1) The application does not change the structure of the existing large compound vibrating screen, has no large mass vibration isolation frame and complex damping mechanism, and only adds a secondary vibration isolation device at the bottom, which is easy to implement.

[0011] (2) The application selects a secondary vibration isolation spring with suitable parameters through scientific theoretical calculation, so as to achieve good vibration isolation effect, greatly reduce the impact dynamic load of the large compound vibrating screen on the foundation, and make the equipment run more reliably. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic view of the structure of the new large compound vibrating screen;

[0013] Figure 2 is a sectional view of the original large compound vibrating screen;

[0014] Figure 3 is a sectional view of the secondary vibration isolation device.

[0015] In the drawing: 1, large compound vibrating screen; 11, screen body; 12, support body; 2, secondary vibration isolation device; 21, secondary vibration isolation spring; 22, upper support plate; 23, lower support plate. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the application. However, the application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the application, so the application is not limited by the specific embodiments disclosed below.

[0017] In the application, unless otherwise explicitly specified and limited, if the terms "mounting", "connection", "connection", "fixing" and the like appear, these terms should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0018] In the present application, unless otherwise explicitly specified and limited, if there is a description such as "on" or "under" or the like of a first feature to a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0019] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0020] Referring to Figure 1 , Figure 1 A schematic diagram of a new large compound vibrating screen structure in an embodiment of the present application is shown. The embodiment of the present application provides a large compound vibrating screen with a secondary vibration isolation device, which comprises: a large compound vibrating screen 1, comprising a screen body 11 and a support body 12, the screen body 11 comprises two or more screen surfaces, which are vibration bodies, and the support body 12 is a non-vibration body; a secondary vibration isolation device 2, comprising a secondary vibration isolation spring 21, an upper support plate 22 and a lower support plate 23, the upper support plate 22 is connected to the bottom of the support body 12 by bolts, the lower support plate 23 is connected to the foundation by bolts, the upper support plate 22 and the lower support plate 23 are oppositely arranged, and the secondary vibration isolation spring 21 is arranged between the upper support plate 22 and the lower support plate 23.

[0021] In this embodiment, the number of the upper support plate 22 and the lower support plate 23 is four, which are evenly arranged below the support body 12.

[0022] Among them, the secondary vibration isolation spring 21 selects appropriate parameters and types according to the mass, amplitude, excitation circular frequency of the screen body 11 and the mass of the support body 12.

[0023] In combination Figure 2 as shown, Figure 2 A sectional view of the original large compound vibrating screen is shown. In this embodiment, the difference between the present application and the original large compound vibrating screen is only that the secondary vibration isolation device 2 is arranged at the bottom. The small improvement makes it easy to implement, and if the selected parameters are appropriate, it can also produce good secondary vibration reduction effect.

[0024] in combination Figure 3 as shown, Figure 3 A cross-sectional view of a secondary vibration isolation device in an embodiment of the present application is shown, in which the secondary vibration isolation spring 21 is a rubber spring.

[0025] In this embodiment, the number of secondary vibration isolation springs 21 between each set of upper support plate 22 and lower support plate 23 is the same and more than one.

[0026] Given the mass m1 of the primary vibration isolation system, the total stiffness K1 of the primary vibration isolation system, and the mass m2 of the secondary vibration isolation system, only the appropriate total stiffness K2 of the secondary vibration isolation system needs to be selected to calculate the working dynamic load of the new large compound vibrating screen 1 on the foundation after the secondary vibration isolation device 2 is added, through the secondary vibration isolation dynamic parameter design calculation method. By comparing with the working dynamic load on the foundation before, the damping effect can be known. In this embodiment, after the secondary vibration isolation device 2 is added, the screen body 11 becomes a primary vibration isolation system, the support body 12 becomes a secondary vibration isolation system, and the new large compound vibrating screen is a new mass system.

[0027] Specifically, this embodiment selects a large compound vibrating screen with a model number of 2565, m1 = 16000 kg, K1 = 3584 N / mm, m2 = 8600 kg, amplitude A = 3 mm, and excitation circular frequency ω = 104.72 rad / s. According to the preferred experience after multiple tests, the spring compression amount is generally selected to be 10-20% of the free height of the spring, and the ratio of the primary vibration isolation spring compression amount to the secondary vibration isolation spring compression amount is selected in the range of 0.5-1.5. Therefore, the secondary vibration isolation spring compression amount is selected to be 30 mm, K2 = 8044 N / mm is obtained through calculation, amplitude B = 0.14 mm, four support points, the working dynamic load F2 after isolation of each support point is F2 = K2 x B ÷ 4 = 282 N, the working dynamic load F1 before isolation is F1 = K1 x A ÷ 4 = 2688 N, and the working dynamic load after isolation is only 10.5% of the working dynamic load before isolation. The isolation effect is very obvious. The specifications of the secondary vibration isolation spring rubber spring are selected according to the value of K2: outer diameter 200 mm, inner diameter 50 mm, free height 200 mm, and number 20, of which there are 5 at each support point.

[0028] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as within the scope of the present disclosure.

[0029] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A large-scale compound vibrating screen with a secondary vibration isolation device, characterized by, The application relates to a large-scale compound vibrating screen, a secondary vibration isolation device and a large-scale compound vibrating screen with the secondary vibration isolation device. The secondary vibration isolation device comprises a secondary vibration isolation spring, an upper support plate and a lower support plate, the upper support plate is fixedly connected with the bottom of the support body, the lower support plate is fixedly connected with a foundation, the upper support plate and the lower support plate are oppositely arranged, and the secondary vibration isolation spring is arranged between the upper support plate and the lower support plate. The secondary vibration isolation spring is a rubber spring.

2. A large-scale compound vibrating screen with a secondary vibration isolation device according to claim 1, characterized in that, The number of the secondary vibration isolation springs between each group of the upper support plate and the lower support plate is the same and more than one.

3. The large-scale compound vibrating screen with secondary vibration isolation device according to claim 1, characterized in that, The number of the upper support plate and the lower support plate is four, and the upper support plate and the lower support plate are uniformly arranged below the support body.

4. The large-scale compound vibrating screen with secondary vibration isolation device according to claim 1, characterized in that, The support body is connected with the upper support plate through bolts.

5. The large-scale compound vibrating screen with secondary vibration isolation device according to claim 1, characterized in that, ​

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