A cylinder head fixing structure of a gas compressor

Abstract

The utility model provides a kind of cylinder cover fixing structure of gas compressor, it is related to gas compressor technical field, including screw rod, the both ends of screw rod are equipped with thread one and thread two respectively, the screw nut is threadedly connected on thread one, sealing rubber pad is equipped on the screw rod between thread one and thread two, the sealing rubber pad is embedded in support ring, support ring is sleeved in antiskid ring;The utility model not only realizes reliable static seal by thread connection and intermediate pad, effectively prevents the leakage of high-pressure gas and lubricating oil, more through the mechanical self-locking effect generated by antiskid ring greatly enhances the anti-loose ability of thread connection, so as to ensure that the entire cylinder cover fixing structure can long-term maintain the stability of connection and the integrity of sealing under the high-frequency vibration and high-pressure working condition of compressor continues.

Description

Technical Field

[0001] This utility model relates to the field of gas compressor technology, and in particular to a cylinder head fixing structure for a gas compressor. Background Technology

[0002] The cylinder head fixing structure of a gas compressor is one of the key components to ensure the normal and reliable operation of the compressor. It mainly uses a specific connection method to tightly fix the cylinder head to the compressor body to withstand the internal gas pressure and other forces.

[0003] In the existing technology, the fixing structure between the gas compressor and the cylinder head mainly relies on the friction force generated by the preload of the bolts to prevent the nuts from turning back, at most supplemented by simple anti-loosening elements such as spring washers. However, under the continuous high-frequency vibration environment of the compressor, this friction force will gradually decay, resulting in a small relative slip between the threaded pairs, which will eventually cause the preload to decrease or even the connection to become completely loose, seriously threatening the safe operation of the equipment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a cylinder head fixing structure for a gas compressor. This structure not only achieves reliable static sealing through threaded connections and intermediate gaskets, effectively preventing leakage of high-pressure gas and lubricating oil, but also greatly enhances the anti-loosening capability of the threaded connection through the mechanical self-locking effect generated by the anti-slip ring. This ensures that the entire cylinder head fixing structure can maintain connection stability and sealing integrity for a long time under the continuous high-frequency vibration and high-pressure conditions of the compressor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cylinder head fixing structure for a gas compressor, including a screw, with a threaded first thread and a threaded second thread at both ends of the screw, a nut threadedly connected to the threaded first thread, a sealing gasket provided on the screw between the threaded first thread and the threaded second thread, the sealing gasket being fitted into a support ring, and the support ring being fitted into an anti-slip ring.

[0006] The anti-slip ring includes two parallel and coaxial washers, with a diagonal brace between the two washers. The inclination direction of the diagonal brace is the same as the screwing direction of the nut on the thread.

[0007] In a preferred embodiment, the sealing gasket includes an annular gasket with an interlocking groove, and the two end faces of the annular gasket are respectively provided with a first convex surface and a second convex surface.

[0008] In a preferred embodiment, the support ring includes a fitting ring, the fitting ring having a reinforcing protrusion at one end near the nut, the fitting ring having a fitting edge that fits into a fitting groove, and the annular pad fitting into the fitting ring.

[0009] In a preferred embodiment, the convex surface protrudes from the upper port of the reinforcing convex edge.

[0010] In a preferred embodiment, the convex surface protrudes from the lower port of the fitting ring.

[0011] In a preferred embodiment, the second thread is threaded into the machine body, the screw is inserted through the cylinder head, an intermediate gasket is provided between the cylinder head and the machine body, and the first thread passes through the cylinder head and is threaded between the nut and the screw.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] This invention not only achieves reliable static sealing through threaded connection and intermediate gasket, effectively preventing leakage of high-pressure gas and lubricating oil, but also greatly enhances the anti-loosening ability of threaded connection through the mechanical self-locking effect generated by anti-slip ring, thereby ensuring that the entire cylinder head fixing structure can maintain connection stability and sealing integrity for a long time under the continuous high-frequency vibration and high-pressure conditions of compressor.

[0014] This invention constructs a dual-functional unit that combines rigid positioning and elastic sealing. The mechanical interlocking mechanism greatly reduces the possibility of relative movement of the sealing gasket, ensuring extreme uniformity of pressure distribution. Meanwhile, the double convex structure fills the gaps through rapid deformation in the early stage of installation, forming two independent annular sealing bands on the outer sides of the upper and lower ports of the interlocking ring, thereby improving the reliability and durability of the entire sealing system under complex working conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a cylinder head fixing structure for a gas compressor provided by this utility model.

[0016] Figure 2 A half-sectional view of the combination of screw, sealing gasket, support ring and anti-slip ring of a cylinder head fixing structure for a gas compressor provided by this utility model.

[0017] Figure 3 A half-sectional view of the sealing gasket, support ring, and anti-slip ring of a gas compressor cylinder head fixing structure provided by this utility model.

[0018] Figure 4 This is a schematic diagram of the installation of a cylinder head fixing structure for a gas compressor provided by this utility model.

[0019] Legend:

[0020] 1. Screw; 2. Thread 1; 3. Nut; 4. Thread 2; 5. Sealing gasket; 6. Support ring; 7. Anti-slip ring; 8. Cylinder head; 9. Intermediate gasket; 10. Engine body;

[0021] 51. Annular gasket; 52. Fitting groove; 53. Convex surface one; 54. Convex surface two;

[0022] 61. Fitting ring; 62. Reinforcing convex edge; 63. Fitting edge;

[0023] 71. Washer ring; 72. Diagonal brace. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figures 1 to 4 As shown, this utility model provides a technical solution: a cylinder head fixing structure for a gas compressor, including a screw 1, with a first thread 2 and a second thread 4 at both ends of the screw 1. A nut 3 is threadedly connected to the first thread 2. A sealing gasket 5 is provided on the screw 1 between the first thread 2 and the second thread 4. The sealing gasket 5 is fitted inside a support ring 6, which is sleeved inside an anti-slip ring 7. In this design, axial mechanical connection is achieved through the first thread 2 and the second thread 4 at both ends of the screw 1. The second thread 4 is fixed to the machine body 10, and the first thread 2 presses the cylinder head 8 by tightening the nut 3. The sealing gasket 5 located between the two threads undergoes elastic deformation under the axial pressure of the nut 3, sealing the cylinder head 8. The design of the sealing gasket 5 being fitted inside the support ring 6 ensures uniform force distribution and positional stability. The support ring 6 is further fitted inside the anti-slip ring 7. Utilizing the characteristic that the direction of the anti-slip ring 7's diagonal brace 72 is the same as the screwing direction of the nut 3, a radial constraint force is generated during tightening, effectively resisting the reverse rotation tendency of the nut 3 caused by vibration. This design forms a multi-stage synergistic sealing and anti-loosening system. The compression deformation of the sealing gasket 5 achieves static sealing, preventing gas or lubricating oil leakage. At the same time, the combined structure of the anti-slip ring 7 and the support ring 6 significantly improves the anti-loosening capability of the threaded connection through the mechanical self-locking principle, ensuring the long-term connection reliability of the cylinder head 8 under the high-frequency vibration conditions of the compressor.

[0027] The anti-slip ring 7 includes two parallel and coaxially arranged washers 71, with a diagonal brace 72 between them. The diagonal brace 72 is inclined in the same direction as the screw-in direction of the nut 3 on the thread 2. In this design, the anti-slip ring 7 provides a stable axial support foundation for the entire assembly through the two parallel and coaxially arranged washers 71, and the diagonal brace 72 is provided between the two washers 71 with the same inclination direction as the screw-in direction of the nut 3 on the thread 2. When the nut 3 is tightened, the axial pressure and rotational torque applied by the nut 3 are transmitted to the anti-slip ring. The ring 7 causes the diagonal brace 72 to undergo slight elastic deformation and generate a tangential force in the same direction as the screwing direction. This tangential force is converted into a radial clamping force on the outer ring of the support ring 6 and the threaded connection. Through the directional design of the diagonal brace 72, this invention preloads a mechanical resistance to resist reverse rotation during installation, which greatly enhances the anti-loosening performance of the threaded connection and makes it difficult for the nut 3 to spontaneously rotate under the continuous vibration environment generated by the compressor operation, thereby ensuring the long-term stability and reliability of the cylinder head 8 fixing structure.

[0028] Furthermore, thread 4 is threaded into the body 10, and screw 1 is threaded through the cylinder head 8. An intermediate washer 9 is provided between the cylinder head 8 and the body 10. Thread 2 passes through the cylinder head 8 and is threaded between the nut 3. In this design, thread 4 is directly screwed into the body 10 to form a solid bottom anchor point, providing basic support for the entire connection structure. The design of screw 1 passing through the cylinder head 8 makes it the core load-bearing component connecting the body 10 and the cylinder head 8. The intermediate washer 9 between the cylinder head 8 and the body 10 is located after thread 2 passes through the cylinder head 8. When tightened with nut 3, it is axially compressed, thereby filling the microscopic unevenness of the contact surface between cylinder head 8 and body 10 and forming a static seal. This design constructs a continuous force flow path from body 10 to screw 1 to cylinder head 8 and finally locked by nut 3. This path ensures that cylinder head 8 is pressed evenly and stably onto body 10. The sealing effect of intermediate gasket 9 effectively prevents high-pressure gas from leaking from the joint surface. At the same time, the entire threaded connection provides good vibration and impact resistance, ensuring the reliability of compressor operation under high pressure conditions.

[0029] In this embodiment, the core connection frame is constructed by the thread 4 and thread 2 at both ends of the screw 1. The thread 4 is screwed into the body 10 to provide basic fixation, while the thread 2 cooperates with the nut 3. By tightening the nut 3, an axial clamping force is generated. The axial clamping force is transmitted sequentially through the anti-slip ring 7, the support ring 6 and the sealing gasket 5, and finally the cylinder head 8 is pressed onto the body 10 through the intermediate gasket 9.

[0030] During this process, the two washer rings 71 of the anti-slip ring 7 can provide stable support. The diagonal brace 72 between the two washer rings 71 has the same tilt direction as the screwing direction of the nut 3. During installation, it undergoes elastic deformation and generates a tangential force in the same direction as the tightening direction. The tangential force is eventually converted into a continuous radial constraint force acting on the support ring 6, forming a static sealing effect. At the same time, when the nut 3 has a tendency to loosen in the opposite direction, the diagonal brace 72 can resist the reverse loosening of the nut 3 due to its incompressibility.

[0031] Example 2

[0032] like Figures 1 to 4 As shown, the sealing gasket 5 includes an annular gasket 51 with a fitting groove 52. The two end faces of the annular gasket 51 are respectively provided with a first convex surface 53 and a second convex surface 54. The support ring 6 includes a fitting ring 61. The fitting ring 61 has a reinforcing convex edge 62 near one end of the nut 3. The fitting ring 61 has a fitting edge 63 that fits into the fitting groove 52. The annular gasket 51 is fitted into the fitting ring 61. In this design, the fitting groove 52 on the annular gasket 5 and the fitting edge 63 in the fitting ring 61 of the support ring 6 precisely fit together, achieving displacement-free fixation of the sealing gasket 5 within the support ring 6 and preventing it from tilting under pressure. The reinforcing convex edge 62 at the port of the interlocking ring 61 enhances the structural strength of the port to resist the huge clamping force applied by the nut 3. At the same time, the design of the convex surface 53 and convex surface 54 at both ends of the annular gasket 51 allows it to preferentially generate greater elastic deformation when axially compressed. This design constructs a sealing unit with the synergistic effect of mechanical interlocking and elasticity. The interlocking structure ensures the uniformity of force and the stability of position of the sealing gasket 5, avoiding sealing failure caused by uneven wear. The double convex surface structure can fill the gap between the sealing gasket 5 and the structure it contacts after being compressed, greatly improving the reliability of the sealing effect.

[0033] In this design, convex surface 53 protrudes from the upper port of the reinforcing edge 62, and convex surface 54 protrudes from the lower port of the fitting ring 61. By making convex surface 53 of the sealing gasket 5 protrude from the upper port of the reinforcing edge 62 of the support ring 6, and convex surface 54 protrude from the lower port of the fitting ring 61, the two protruding surfaces of the sealing gasket 5 will contact the adjacent pressing surface first, and undergo elastic deformation first under axial pressure, when the nut 3 is tightened and presses down on the support ring 6. This design, using convex surface 53 and convex surface 54 as pilot sealing contact points, ensures that even when the installation pressing force has not reached its maximum value, the gap at its port can be fully filled by the compression of the annular gasket 51 itself. This forms two independent and reliable annular sealing bands on the outer sides of the upper and lower ports of the fitting ring 61, greatly enhancing the response speed and sealing effectiveness of the entire sealing structure, and improving the containment and stability of the seal.

[0034] In this embodiment, the fitting groove 52 on the annular gasket 51 of the sealing gasket 5 and the fitting edge 63 provided in the fitting ring 61 of the support ring 6 form a mechanical interlock, ensuring that the sealing gasket 5 will not be displaced or twisted when subjected to the axial pressure of the nut 3. At the same time, the reinforcing protrusion 62 at the end of the fitting ring 61 significantly enhances the mechanical strength of the structure against the clamping force. The specially designed convex surface 53 and convex surface 54 at both ends of the annular gasket 51 protrude from the upper port of the reinforcing protrusion 62 and the lower port of the fitting ring 61, so that they can preferentially contact adjacent components and generate concentrated elastic deformation during the tightening of the nut 3.

[0035] Working principle:

[0036] like Figures 1 to 4 As shown, when using this utility model, first install the screw 1 on the mounting hole of the machine body 10, then put the intermediate washer 9 on the screw 1, then place the cylinder cover 8, then place the sealing structure composed of the sealing gasket 5 and the support ring 6 on the screw 1, then place the anti-slip ring 7 on the outer ring of the support ring 6, and finally install the nut 3 on the thread 2.

[0037] When the machine body 10 vibrates:

[0038] Vibration is transmitted directly to screw 1 through thread 2 4. The vibration collected on screw 1 attempts to be transmitted towards nut 3, but it first encounters the sealing structure composed of sealing gasket 5 and support ring 6. The elastic properties of sealing gasket 5 in this structure absorb and dissipate some of the high-frequency vibration energy, converting it into heat energy, thereby weakening the vibration intensity. At the same time, the vibration is transmitted to the anti-slip ring 7 sleeved on the outer ring of support ring 6. The inclined brace 72, which is inclined in the same direction as the screwing direction of nut 3, will generate a small elastic deformation recovery force opposite to the vibration direction under the action of vibration. This deformation continuously consumes vibration energy, and the radial constraint force generated by it effectively suppresses the radial micro-movement that may occur in screw 1, thereby cutting off the path of vibration causing the threaded connection to loosen. Finally, through the damping and vibration reduction of sealing gasket 5, the dynamic suppression and mechanical self-locking of anti-slip ring 7, and the buffering effect of intermediate pad 9, the vibration generated by body 10 is effectively isolated and canceled, ensuring the long-term stability of nut 3 connection and the reliability of sealing.

[0039] In addition, the intermediate gasket 9 can be replaced with a sealing gasket 5 and a support ring 6 to further increase the sealing of the screw 1 installation environment.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A cylinder head fixing structure of a gas compressor, characterized in that It includes a screw rod (1), with a first thread (2) and a second thread (4) provided at both ends of the screw rod (1) respectively. A nut (3) is threadedly connected to the first thread (2). A sealing gasket (5) is provided on the screw rod (1) between the first thread (2) and the second thread (4). The sealing gasket (5) is fitted in a support ring (6), and the support ring (6) is sleeved in an anti-slip ring (7). The anti-slip ring (7) includes two pad rings (71) that are parallel and coaxially arranged with each other. An inclined brace (72) is provided between the two pad rings (71). The inclination direction of the inclined brace (72) is the same as the advancing direction of the nut (3) on the first thread (2).

2. The cylinder head fixing structure of a gas compressor according to claim 1, wherein: The sealing gasket (5) includes an annular gasket (51) with a fitting groove (52) opened. A first convex surface (53) and a second convex surface (54) are provided on both end faces of the annular gasket (51).

3. The cylinder head fixing structure of a gas compressor according to claim 2, characterized in that: The support ring (6) includes a fitting ring (61). A reinforcing convex edge (62) is provided at one port of the fitting ring (61) close to the nut (3). A fitting edge (63) that is fitted in the fitting groove (52) is provided in the fitting ring (61). The annular gasket (51) is fitted in the fitting ring (61).

4. The cylinder head fixing structure of a gas compressor according to claim 2, characterized in that: The first convex surface (53) protrudes from the upper port of the reinforcing convex edge (62).

5. The cylinder head fixing structure of a gas compressor according to claim 2, characterized in that: The second convex surface (54) protrudes from the lower port of the fitting ring (61).

6. The cylinder head fixing structure of a gas compressor according to claim 1, wherein: The second thread (4) is threadedly connected in the body (10). The screw rod (1) is disposed through the cylinder head (8). An intermediate gasket (9) is provided between the cylinder head (8) and the body (10). The first thread (2) passes through the cylinder head (8) and is threadedly connected to the nut (3).

Images