Sealing mechanism and nitrogen spring thereof

Abstract

The utility model discloses a sealing mechanism and a nitrogen spring thereof, and relates to the technical field of sealing equipment. The device comprises an adjusting unit, wherein the adjusting unit comprises a compensation ring, a sealing piece and a bimetallic strip; the sealing piece is arranged in the compensation ring; the double metal sheets are arranged in the compensation ring, distributed in an annular array mode and in transmission connection with the sealing piece, the double metal sheets drive the sealing piece to contract inwards through deformation at the high temperature, and the double metal sheets drive the sealing piece to expand outwards through deformation at the low temperature. According to the sealing mechanism of the device, through the design of the bimetallic strip, the position of the sealing piece can be automatically adjusted according to the temperature change, the sealing piece shrinks inwards at the high temperature, the sealing piece expands outwards at the low temperature, the good sealing effect is kept, and the problem of sealing failure caused by the temperature change is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of sealing equipment technology, specifically to a sealing mechanism and its nitrogen spring. Background Technology

[0002] In industrial production, many devices require good sealing performance to ensure their normal operation and service life. For example, nitrogen springs, as a common elastic element, are widely used in mold making, automobile manufacturing, and other fields.

[0003] Under different temperature conditions, due to the thermal expansion and contraction of materials, jamming or gaps may easily occur between the seal and the sealed part, resulting in gas leakage, which affects the performance and stability of the nitrogen spring and has limitations.

[0004] The reason for this problem is that the temperature environment is complex and variable in actual working conditions. In high-temperature environments, the rubber, plastic and other polymer materials used in the seals soften and expand due to thermal expansion. On the one hand, excessive expansion causes a sharp increase in the friction between the seal and the sealed part, which in turn causes jamming and hinders the smooth movement of the piston inside the nitrogen spring. In low-temperature environments, the flexibility and fit of the seal are greatly reduced, and gaps inevitably appear between it and the sealed part, significantly increasing the risk of nitrogen leakage. Therefore, we propose a sealing mechanism and its nitrogen spring to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a sealing mechanism and its nitrogen spring, which solves the problem that under different temperature environments, thermal expansion and contraction of materials can easily lead to jamming or gaps between the sealing element and the sealed part, resulting in gas leakage, affecting the performance and stability of the nitrogen spring, and thus having limitations.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a sealing mechanism and its nitrogen spring, including an adjustment unit, wherein the adjustment unit includes a compensation ring, a sealing element and a bimetallic strip;

[0007] The sealing element is disposed inside the compensation ring; the bimetallic strip is disposed inside the compensation ring, the bimetallic strip is distributed in a ring array, the bimetallic strip is connected to the sealing element in a driving connection, the bimetallic strip causes the sealing element to contract inward through deformation at high temperature, and the bimetallic strip causes the sealing element to open outward through deformation at low temperature.

[0008] Preferably, the compensation ring has a guide groove inside, and the seal is movably engaged inside the guide groove.

[0009] Preferably, the guide groove is internally provided with a sliding groove arranged in a ring array, and the sliding groove is internally and slidably connected with a sliding block, and the sliding block is fixedly assembled with a sealing element.

[0010] Preferably, the sliding block is fixedly assembled with a fixed block on one side, the fixed block is fixedly assembled with a butterfly spring on one side, and the other side of the butterfly spring is fixedly assembled with a compensation ring.

[0011] Preferably, the bimetallic strip comprises a low-expansion layer and a high-expansion layer.

[0012] The low-expansion layer is arranged in the fixed block, the high-expansion layer is fixedly assembled on the top of the low-expansion layer, one end of the bimetallic strip is fixedly assembled with the fixed block, and the other end of the bimetallic strip is fixedly assembled with the compensation ring.

[0013] Preferably, the nitrogen spring comprises a spring body, and the spring body is sealed in the inside by a sealing mechanism.

[0014] Preferably, one side of the spring body is provided with a high-pressure gas valve, the inside of the spring body is slidably connected with an end cover, and the adjusting unit is arranged on the end cover.

[0015] Preferably, the top of the end cover is fixedly assembled with a piston rod, the top of the spring body is fixedly assembled with a dustproof element, and the inner wall of the dustproof element is in abutment with the end of the piston rod.

[0016] The sealing mechanism of the device can automatically adjust the position of the sealing element according to the change of temperature, the sealing element is inwardly retracted at high temperature, the sealing element is outwardly expanded at low temperature, and good sealing effect is always maintained, and the sealing failure problem caused by temperature change is effectively solved.

[0017] The sealing mechanism of the device can automatically adjust the position of the sealing element according to the change of temperature, the sealing element is inwardly retracted at high temperature, the sealing element is outwardly expanded at low temperature, and good sealing effect is always maintained, and the sealing failure problem caused by temperature change is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0019] Figure 1 It is a whole structure schematic view of the present application;

[0020] Figure 2 It is a compensation ring internal structure schematic view of the present application;

[0021] Figure 3 It is the adjusting unit structure schematic view of the utility model;

[0022] Figure 4 It is the spring body internal structure schematic view of the utility model;

[0023] Figure 5 It is the spring body structure schematic view of the utility model.

[0024] In the figure: 1, adjusting unit;11, compensating ring;12, sealing element;13, bimetallic strip;131, low expansion layer;132, high expansion layer;14, guide groove;15, sliding slot;16, sliding block;17, butterfly spring;18, fixed block;2, spring body;21, high-pressure gas valve;22, end cover;23, piston rod;24, dustproof element. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0026] The sealing mechanism and nitrogen gas spring provided by the embodiment of the application solve the problem that due to thermal expansion and cold contraction of materials under different temperature environments, the sealing element and the sealed part are prone to be stuck or have a gap, thereby causing gas leakage, affecting the performance and stability of the nitrogen gas spring, and having limitations.

[0027] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings of the specification and specific embodiments. EMBODIMENT

[0028] The utility model embodiment discloses a sealing mechanism and nitrogen gas spring. According to the accompanying Figures 1-3 As shown in the figure, it comprises adjusting unit 1, adjusting unit 1 includes compensating ring 11, sealing element 12 and bimetallic strip 13;

[0029] Sealing element 12 is arranged in the inside of compensating ring 11;Bimetallic strip 13 is arranged in the inside of compensating ring 11, bimetallic strip 13 is annular array distribution, bimetallic strip 13 is transmission connection with sealing element 12, bimetallic strip 13 is in high temperature through deformation and drives sealing element 12 to contract inwards, bimetallic strip 13 is in low temperature through deformation and drives sealing element 12 to open outwards.

[0030] The inside of the compensation ring 11 is provided with a guide groove 14, the sealing element 12 is movably connected in the inside of the guide groove 14, the inside of the guide groove 14 is provided with a sliding groove 15, the sliding groove 15 is arranged in an annular array, the sliding groove 15 is slidably connected with a sliding block 16, the sliding block 16 is fixedly connected with the sealing element 12, one side of the sliding block 16 is fixedly connected with a fixed block 18, one side of the fixed block 18 is fixedly connected with a butterfly spring 17, the other side of the butterfly spring 17 is fixedly connected with the compensation ring 11, the bimetallic strip 13 comprises a low-expansion layer 131 and a high-expansion layer 132; the low-expansion layer 131 is arranged in the inside of the fixed block 18; the high-expansion layer 132 is fixedly connected on the top of the low-expansion layer 131; one end of the bimetallic strip 13 is fixedly connected with the fixed block 18, and the other end of the bimetallic strip 13 is fixedly connected with the compensation ring 11.

[0031] In the embodiment, when the ambient temperature changes, the bimetallic strip 13 will be deformed due to the temperature change. Since the bimetallic strip 13 is composed of the low-expansion layer 131 and the high-expansion layer 132, in a high-temperature environment, the expansion degree of the high-expansion layer 132 is greater than that of the low-expansion layer 131, so that the bimetallic strip 13 is bent upward, the convex surface is upward, thereby driving the fixed block 18 fixedly connected with one end of the bimetallic strip 13 and the sliding block 16 connected with the fixed block 18 to slide in the sliding groove 15, and further driving the sealing element 12 to shrink inwardly in the guide groove 14, so that the sealing element 12 and the sealed part can still maintain close contact, and good sealing effect is achieved.

[0032] In a low-temperature environment, the high-expansion layer 132 of the bimetallic strip 13 is contracted more than the low-expansion layer 131, the bimetallic strip 13 is bent downward, the bimetallic strip tends to be linear, drives the fixed block 18 and the sliding block 16 to slide reversely, so that the sealing element 12 is opened outwardly in the guide groove 14, and the sealing performance in the low-temperature environment is ensured. The butterfly spring 17 plays a role of auxiliary adjustment and buffering in the whole process, so that the movement of the sealing element 12 is more stable and reliable, the bimetallic strip 13 is in the shape of an upwardly curved arc, the normal use of the device is ensured, the low-expansion layer 131 is a nickel-iron alloy, the high-expansion layer 132 is brass, and the bimetallic strip 13 is bent when heated, the two are combined by high-pressure rolling, and since the deformation range of the bimetallic strip 13 is limited, the shrinkage or opening of the sealing element 12 is also limited, so that the sealing element is not deformed too much, and the sealing effect is ensured. EMBODIMENT

[0033] The utility model discloses a sealing mechanism and nitrogen spring thereof, on the basis of embodiment one, more specifically, according to the Figure 1 、 4 , 5 shows, including adjusting unit 1, adjusting unit 1 includes compensation ring 11, sealing element 12 and bimetallic strip 13;

[0034] The sealing member 12 is arranged inside the compensation ring 11; the bimetallic strip 13 is arranged inside the compensation ring 11, the bimetallic strip 13 is arranged in an annular array, the bimetallic strip 13 is in transmission connection with the sealing member 12, the bimetallic strip 13 drives the sealing member 12 to contract inwards by deformation at high temperature, and the bimetallic strip 13 drives the sealing member 12 to expand outwards by deformation at low temperature.

[0035] The nitrogen spring comprises a spring body 2, the inside of the spring body 2 is sealed by a sealing mechanism, one side of the spring body 2 is provided with a high-pressure gas valve 21, the inside of the spring body 2 is slidably connected with an end cover 22, an adjusting unit 1 is arranged on the end cover 22, the top of the end cover 22 is fixedly provided with a piston rod 23, the top of the spring body 2 is fixedly provided with a dustproof piece 24, and the inner wall of the dustproof piece 24 is in abutment with the end of the piston rod 23.

[0036] In the embodiment, when the nitrogen spring works, the spring body 2 is filled with high-pressure nitrogen gas through the high-pressure gas valve 21. When the piston rod 23 is subjected to external force, the end cover 22 slides in the spring body 2, and since the end cover 22 is provided with the sealing member 12, the nitrogen gas in the spring body 2 can be effectively prevented from leaking. The dustproof piece 24 can prevent foreign matters such as dust from the outside from entering the inside of the spring body 2, thereby affecting the normal work of the nitrogen spring. Under different temperature environments, the bimetallic strip 13 of the sealing mechanism can automatically adjust the position of the sealing member 12, thereby ensuring that the nitrogen spring always maintains good sealing performance and working stability.

[0037] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing mechanism, characterized in that, Includes an adjustment unit (1), the adjustment unit (1) comprising; Compensation ring (11); A seal (12) is disposed inside the compensation ring (11); A bimetallic strip (13) is disposed inside the compensation ring (11). The bimetallic strip (13) is arranged in a ring array. The bimetallic strip (13) is connected to the seal (12) in a transmission connection. When the bimetallic strip (13) is at high temperature, it causes the seal (12) to shrink inward by deformation. When the bimetallic strip (13) is at low temperature, it causes the seal (12) to open outward by deformation.

2. The sealing mechanism according to claim 1, characterized in that: The compensation ring (11) has a guide groove (14) inside, and the seal (12) is movably engaged inside the guide groove (14).

3. A sealing mechanism according to claim 2, characterized in that: The guide groove (14) has a sliding groove (15) inside, the sliding groove (15) is arranged in a ring array, and a slider (16) is slidably connected inside the sliding groove (15), the slider (16) is fixedly assembled with the seal (12).

4. A sealing mechanism according to claim 3, characterized in that: A fixing block (18) is fixedly mounted on one side of the slider (16), a butterfly spring (17) is fixedly mounted on one side of the fixing block (18), and the other side of the butterfly spring (17) is fixedly mounted to the compensation ring (11).

5. A sealing mechanism according to claim 1, characterized in that: The bimetallic strip (13) comprises; A low-expansion layer (131) is disposed inside the fixing block (18); A high-expansion layer (132) is fixedly mounted on top of a low-expansion layer (131); One end of the bimetallic strip (13) is fixedly assembled with the fixing block (18), and the other end of the bimetallic strip (13) is fixedly assembled with the compensation ring (11).

6. A nitrogen spring, characterized in that, It includes a spring body (2), the interior of which is sealed by a sealing mechanism as described in claims 1-5.

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