A piston hydrogen compressor assembly and hydrogen compressor thereof

Abstract

The application relates to the technical field of compressors, and discloses a piston-type hydrogen compressor assembly and a hydrogen compressor thereof, which comprises a piston ring, three limiting grooves are arranged in the side wall of a piston body, the piston ring is movably connected in the limiting groove of the piston body, an opening is arranged in the piston ring, the piston ring comprises a flow resistance ring and a sealing ring, the cross section of the flow resistance ring is a T-shaped structure with a rotation angle of 90 degrees, the flow resistance ring is fixedly connected to the inner ring wall surface of the sealing ring, and the outer ring wall surface of the sealing ring is in contact with the inner wall of a cylinder sleeve. The flow resistance ring shares the stress borne by the sealing ring and restricts the deformation space of the sealing ring, so that the deformation of the sealing ring in the radial direction under high temperature and high pressure is effectively prevented, the anti-creep property of the sealing ring is improved, the gap size between the sealing ring and the cylinder sleeve is always in a safe range, the sealing property between the sealing ring and the cylinder sleeve is improved, the compression efficiency of the piston body on hydrogen is ensured, and the service life of the piston ring is prolonged.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and in particular to a piston-type hydrogen compressor assembly and its hydrogen compressor. Background Technology

[0002] Hydrogen energy is a clean, efficient, safe, and sustainable new energy source, and hydrogen compressors are the core link connecting all aspects of the hydrogen energy industry chain, enabling the efficient storage, transportation, and use of hydrogen. There are various types of hydrogen compressors, among which the piston-type hydrogen compressor belongs to the positive displacement compressor category. It uses the reciprocating motion of a piston within a cylinder to change the working volume of the gas, completing the intake, compression, and discharge of hydrogen to achieve hydrogen pressurization and transportation.

[0003] The piston-type hydrogen compressor assembly is a crucial component of a hydrogen compressor. It includes the piston body, piston rings, cylinder, and cylinder liner. Piston-type hydrogen compressors employ two lubrication methods: oil lubrication and oilless lubrication. In oilless hydrogen compressors, the piston rings in contact with the cylinder wall are often made of self-lubricating materials, such as polytetrafluoroethylene (PTFE). While PTFE possesses ideal self-lubricating properties, it also has some drawbacks during compressor operation: increased temperature intensifies the thermal motion of PTFE molecules, softening the PTFE matrix and making the molecular chains prone to slippage and rearrangement. Furthermore, the piston rings continuously bear back pressure from the gas pressure and friction from the cylinder wall, causing "creep" in the piston rings. This results in a reduction in the outer diameter of the piston rings, leading to a gradual increase in the gap between the piston rings and the cylinder wall, ultimately increasing hydrogen leakage and reducing compression efficiency. Summary of the Invention

[0004] This application proposes a piston-type hydrogen compressor assembly and a hydrogen compressor thereof, which has the advantages of designing piston rings and adding auxiliary mechanisms to improve the creep resistance of piston rings, ensure the compression efficiency of the piston body for hydrogen, and extend the service life of piston rings, thereby solving the above-mentioned problems.

[0005] To achieve the above objectives, this application adopts the following technical solution: a reciprocating hydrogen compressor assembly, comprising:

[0006] A cylinder block and a cylinder liner, wherein the cylinder liner is fixedly sleeved at the middle part of the cylinder block;

[0007] The piston body is movably disposed in the middle of the cylinder liner, and the piston body is coaxially disposed with the cylinder liner.

[0008] The piston ring has three limiting grooves on the side wall of the piston body, and the piston ring is movably engaged in the limiting grooves of the piston body. The piston ring has an opening. The piston ring includes a flow-blocking ring and a sealing ring. The cross-section of the flow-blocking ring is a T-shape rotated 90 degrees, and the flow-blocking ring is fixedly embedded in the inner wall of the sealing ring. The outer wall of the sealing ring is in contact with the inner wall of the cylinder liner. The flow-blocking ring is made of metal, and the sealing ring is filled with polytetrafluoroethylene material. The flow-blocking ring can share the stress borne by the sealing ring and constrain the deformation space of the sealing ring.

[0009] Furthermore, the openings of the three piston rings are staggered, with each pair being offset by an angle of 120 degrees.

[0010] Furthermore, the cylinder block and cylinder liner together constitute the working mechanism, and a fixing mechanism is provided at the bottom end of the working mechanism, the fixing mechanism including:

[0011] The machine body, the top of which is connected to the bottom of the cylinder by bolts;

[0012] A power motor is fixedly sleeved on one side of the machine body.

[0013] Furthermore, a transmission mechanism is provided between the fixing mechanism and the working mechanism, the transmission mechanism comprising:

[0014] A rotating shaft, one end of which is movably connected to a power motor;

[0015] A crankshaft, the other end of which is fixedly connected to the middle of the crankshaft;

[0016] The lower connecting rod, one end of the crankshaft is movably connected to one end of the lower connecting rod;

[0017] A crossbar, wherein the other end of the lower connecting rod is movably connected to one end of the crossbar;

[0018] The other end of the cross bar is movably connected to the middle of the upper connecting rod;

[0019] The piston rod has its top end fixedly connected to the bottom end of the piston body, and the two sides of the bottom end of the piston rod are movably sleeved with the two ends of the upper connecting rod.

[0020] Furthermore, the inner wall of the flow-blocking ring is provided with several inclined grooves.

[0021] Furthermore, an auxiliary mechanism is provided within the piston body, and the auxiliary mechanism includes:

[0022] A dispersion shell is fixedly connected to the bottom end of the piston body, and an annular cavity is formed inside the dispersion shell;

[0023] The gas supply pipe has one end fixedly connected to the bottom end of the annular cavity of the dispersion shell, and the other end of the gas supply pipe passes through the machine body and is connected to the cooling gas pump. There are two gas supply pipes, one for filling and the other for exhausting. The two gas supply pipes do not work at the same time.

[0024] The movable parts are three movable parts that are movably sleeved at the top of the annular cavity of the dispersion shell, and the three movable parts are evenly arranged around the piston body.

[0025] Furthermore, the movable component includes:

[0026] The piston body has three movable grooves at its bottom end, and the upper half of the movable rod is movably sleeved with the movable grooves of the piston body, while the lower half of the movable rod is movably sleeved with the top surface of the dispersion shell.

[0027] A movable block is fixedly connected to the bottom surface of the bottom end of the movable rod;

[0028] A sealing membrane is fixedly connected between the bottom top surface of the movable rod and the inner top surface of the dispersion shell, and the sealing membrane is elastic.

[0029] The piston body has a movable cavity with an inclined plate. One movable groove is vertically connected to three movable cavities, and a limiting groove is horizontally connected to three movable cavities. A set of inclined plates is fixedly connected to the outer wall of the movable cavity. Several inclined plates arranged in a ring form a set of inclined plates. One of the inclined plates extends out of the movable cavity and into the limiting groove. The end of the inclined plate is engaged with the inclined groove of the flow-blocking ring. The inclined plate can move within the inclined groove of the flow-blocking ring.

[0030] A hydrogen compressor using a reciprocating hydrogen compressor assembly, the hydrogen compressor further comprising:

[0031] A connecting mechanism is provided at the top of the working mechanism;

[0032] A top cover mechanism is provided at the top of the connecting mechanism.

[0033] Furthermore, the connecting mechanism includes:

[0034] A connecting plate, wherein the connecting plate is disposed at the top of the cylinder body;

[0035] The connecting plate is divided into an inlet space and an outlet space, and a valve assembly is fixedly installed in both the inlet space and the outlet space. One valve assembly is used to input hydrogen into the working mechanism, and the other valve assembly is used to output hydrogen from the working mechanism.

[0036] Furthermore, the top cover mechanism includes:

[0037] A cover body, which is connected to the top of the cylinder body by bolts, with the bolts passing through a connecting plate;

[0038] The connecting plate separates the air inlet space and the air outlet space through the cover. Both ends of the cover are fitted with a delivery pipe. One delivery pipe is used to input hydrogen into the air inlet space, and the other delivery pipe is used to output hydrogen from the air outlet space.

[0039] The beneficial effects of this invention are as follows:

[0040] This application provides a piston-type hydrogen compressor assembly and its hydrogen compressor. By designing the piston ring, the piston ring is composed of a flow-blocking ring and a sealing ring. Specifically, a rigid flow-blocking ring is set in the inner ring of the sealing ring filled with polytetrafluoroethylene material. The flow-blocking ring shares the stress borne by the sealing ring and restricts its deformation space, thereby effectively preventing the sealing ring from deforming inward under high temperature and high pressure. This improves the creep resistance of the sealing ring and keeps the gap between the sealing ring and the cylinder liner within a safe range, thereby improving the sealing performance between the sealing ring and the cylinder liner, ensuring the compression efficiency of hydrogen by the piston body, and extending the service life of the piston ring.

[0041] By incorporating an auxiliary mechanism within the piston body, which includes a dispersion shell, a gas supply pipe, and a moving part, cooling gas is first supplied to the moving part via the dispersion shell and the gas supply pipe. Then, the moving part absorbs heat from the piston body and piston rings, effectively dissipating heat from the piston rings and reducing their temperature. This slows down the rate of creep in the sealing rings, further improving the sealing performance between the sealing rings and the cylinder liner, ensuring the compression efficiency of the piston body, and extending the service life of the piston rings.

[0042] By designing the moving parts, which consist of a moving rod, a moving block, a sealing diaphragm, and a ramp, the snap-fit ​​design of the ramp and the flow-blocking ring not only effectively increases the heat transfer area and improves the heat dissipation of the piston rings, but also effectively restricts the circumferential rotation of the three piston rings, ensuring that the openings of the three piston rings are always in a preset misaligned state to ensure the sealing of the cylinder liner. Secondly, when the two gas supply pipes reciprocate to charge and exhaust the dispersion shell and the moving rod, the moving rod can drive the ramp to rise and fall, which can push the three piston rings to rotate synchronously and slowly in a small circumferential direction. This effectively ensures the uniformity of the wear of the sealing rings, preventing one-sided wear, and also effectively ensures the uniformity of heat dissipation of the sealing rings, preventing local overheating, thereby extending the service life of the piston rings. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or 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 only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0044] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0045] Figure 2 This is a cross-sectional three-dimensional structural diagram of the entire invention;

[0046] Figure 3 This is a three-dimensional structural diagram showing the fixed mechanism, working mechanism, connecting mechanism and top cover mechanism in this invention.

[0047] Figure 4 This is a three-dimensional structural diagram of the transmission mechanism, piston body, piston ring, and auxiliary mechanism in this invention;

[0048] Figure 5 This is a three-dimensional structural diagram of the upper connecting rod, piston rod, piston body, piston ring, and auxiliary mechanism in this invention;

[0049] Figure 6 In this invention Figure 5 Cross-sectional three-dimensional structural diagram of the component;

[0050] Figure 7 In this invention Figure 6 Enlarged structural diagram at point A;

[0051] Figure 8 This is a three-dimensional structural diagram showing the upper connecting rod, piston rod, piston body, piston ring, and auxiliary mechanism in this invention.

[0052] Figure 9 This is a three-dimensional structural diagram of the piston ring in this invention;

[0053] Figure 10 This is a three-dimensional structural diagram of the auxiliary mechanism in this invention;

[0054] Figure 11 This is a top view of the auxiliary mechanism in this invention;

[0055] Figure 12 This is a three-dimensional structural diagram of the movable component in this invention.

[0056] In the diagram: 1. Fixed mechanism; 11. Machine body; 12. Power motor; 2. Working mechanism; 21. Cylinder block; 22. Cylinder liner; 3. Connecting mechanism; 31. Connecting plate; 32. Valve assembly; 4. Top cover mechanism; 41. Cover body; 42. Delivery pipe; 5. Transmission mechanism; 51. Rotating shaft; 52. Crankshaft; 53. Lower connecting rod; 54. Cross rod; 55. Upper connecting rod; 56. Piston rod; 6. Piston body; 7. Piston ring; 71. Flow-blocking ring; 72. Sealing ring; 8. Auxiliary mechanism; 81. Dispersion shell; 82. Gas delivery pipe; 9. Moving parts; 91. Moving rod; 92. Moving block; 93. Sealing membrane; 94. Inclined plate. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] Example 1: A piston-type hydrogen compressor assembly, such as... Figures 1-3 The device includes a fixed mechanism 1, and a working mechanism 2 is provided at the top of the fixed mechanism 1. The fixed mechanism 1 is a space component that provides power, and the working mechanism 2 is a space component that compresses hydrogen. Specifically, the fixed mechanism 1 includes a body 11 and a power motor 12, and the working mechanism 2 includes a cylinder 21 and a cylinder liner 22. The top of the body 11 is connected to the bottom of the cylinder 21 by bolts, and the cylinder liner 22 is fixedly sleeved in the middle of the cylinder 21.

[0059] like Figures 4-9 A piston body 6 is movably mounted in the middle of the cylinder liner 22, and the piston body 6 is coaxially mounted with the cylinder liner 22. The piston body 6 is the component that applies thrust to the hydrogen. Three limiting grooves are provided on the side wall of the piston body 6, and piston rings 7 are movably engaged in the limiting grooves of the piston body 6. The piston rings 7 are the component that prevents hydrogen leakage. An opening is provided on the piston rings 7 to facilitate the installation and removal of the piston rings 7 from the piston body 6. The openings of the three piston rings 7 are staggered, and the angle between each pair is 120 degrees, so that the openings of the three piston rings 7 do not overlap in the same direction, so as to form a labyrinth-like sealing path and prevent high-pressure gas from leaking directly from the opening.

[0060] like Figures 5-9The piston ring 7 includes a flow-blocking ring 71 and a sealing ring 72. The flow-blocking ring 71 has a T-shaped cross-section rotated 90 degrees and is fixedly embedded in the inner wall of the sealing ring 72. The outer wall of the sealing ring 72 is in contact with the inner wall of the cylinder liner 22. The flow-blocking ring 71 is made of a metal with high thermal conductivity and strong heat resistance, and the sealing ring 72 is filled with polytetrafluoroethylene material. Thus, the flow-blocking ring 71 can share the stress borne by the sealing ring 72 and constrain the deformation space of the sealing ring 72, effectively preventing the sealing ring 72 from deforming inward under high temperature and high pressure. This ensures that the gap between the sealing ring 72 and the cylinder liner 22 is always within a safe range, thereby improving the sealing performance between the sealing ring 72 and the cylinder liner 22, ensuring the compression efficiency of hydrogen in the piston body 6, and extending the service life of the piston ring 7.

[0061] like Figures 2-4 A transmission mechanism 5 is provided between the fixed mechanism 1 and the working mechanism 2. The transmission mechanism 5 includes a rotating shaft 51, a crankshaft 52, a lower connecting rod 53, a cross rod 54, an upper connecting rod 55, and a piston rod 56. A power motor 12 is fixedly sleeved on one side of the machine body 11. One end of the rotating shaft 51 is movably connected to the power motor 12, and the other end of the rotating shaft 51 is fixedly connected to the middle of the crankshaft 52. One end of the crankshaft 52 is movably sleeved to one end of the lower connecting rod 53, and the other end of the lower connecting rod 53 is movably sleeved to one end of the cross rod 54. The other end of the cross rod 54 is connected to the upper connecting rod 55. The piston rod 56 is fixedly connected to the bottom of the piston body 6, and the bottom two sides of the piston rod 56 are movably connected to the two ends of the upper connecting rod 55. By utilizing the connection design of the rotating shaft 51, crankshaft 52, lower connecting rod 53, cross rod 54, upper connecting rod 55 and piston rod 56, the rotational force of the power motor 12 can be converted into the driving force for the piston body 6 to reciprocate linear motion. Then, through the cooperation design of the piston body 6 and piston ring 7, the internal volume of the working mechanism 2 is changed to convert mechanical energy into the pressure energy of hydrogen, thereby realizing the pressurization and transportation of hydrogen.

[0062] Example 2, based on Example 1, such as Figures 5-10 An auxiliary mechanism 8 is provided inside the piston body 6. The auxiliary mechanism 8 includes a dispersion shell 81, an air supply pipe 82, and movable parts 9. The bottom end of the piston body 6 is fixedly connected to the dispersion shell 81, and an annular cavity is opened inside the dispersion shell 81. One end of the air supply pipe 82 is fixedly connected to the bottom end of the annular cavity of the dispersion shell 81, and the other end of the air supply pipe 82 passes through the machine body 11 and is connected to the cooling air pump. There are two air supply pipes 82, one for charging and the other for exhausting. The two air supply pipes 82 do not work at the same time. Three movable parts 9 are movably sleeved at the top end of the annular cavity of the dispersion shell 81, and the three movable parts 9 are evenly arranged around the piston body 6. The auxiliary mechanism 8 absorbs heat to improve the heat dissipation effect of the piston ring 7.

[0063] Example 3, based on Example 2, such as Figure 9 The inner wall of the flow-blocking ring 71 has several inclined grooves, which can increase the heat dissipation area of ​​the flow-blocking ring 71 and improve the heat dissipation effect.

[0064] like Figures 10-12 The movable component 9 includes a movable rod 91, a movable block 92, a sealing membrane 93, and an inclined plate 94. The bottom end of the piston body 6 has three movable grooves. The upper half of the movable rod 91 is movably sleeved with the movable grooves of the piston body 6, and the lower half of the movable rod 91 is movably sleeved with the top surface of the dispersion housing 81. The bottom surface of the movable rod 91 is fixedly connected to the movable block 92. The movable block 92 ensures a gap between the bottom surface of the movable rod 91 and the inner bottom surface of the dispersion housing 81, allowing cooling gas to enter the movable rod 91. This facilitates the rapid absorption of heat from the piston rings 7 by the cooling gas, improving the heat dissipation effect of the piston rings 7. The piston body 6 provides the power for the lifting and lowering of the movable rod 91. A sealing membrane 93 is fixedly connected between the bottom top surface of the movable rod 91 and the inner top surface of the dispersion housing 81, effectively increasing the sealing effect between the movable rod 91 and the dispersion housing 81 and reducing the possibility of cooling gas escaping from the dispersion housing 81. The sealing membrane 93 is elastic. When the amount of cooling gas in the dispersion housing 81 and the movable rod 91 is small, the movable rod 91 descends to the lowest point inside the dispersion housing 81 under the action of the sealing membrane 93, providing conditions for the subsequent gas supply pipe 82 to fill with gas to push the movable rod 91 upward. The piston body 6 has a movable cavity, and one movable groove is vertically connected to three movable cavities. The limiting groove is laterally connected to the three movable chambers. A set of inclined plates 94 is fixedly connected to the outer wall of 61 inside the movable chamber. Several inclined plates 94 arranged in a ring form a set of inclined plates 94, which can increase the heat absorption area of ​​the movable rod 91 to improve the heat dissipation effect of the piston ring 7. One of the inclined plates 94 extends out of the movable chamber and into the limiting groove, and the end of the inclined plate 94 is engaged with the inclined groove of the flow-blocking ring 71, which can effectively limit the circumferential rotation of the three piston rings 7 and ensure that the openings of the three piston rings 7 are always in a preset misaligned state to ensure the sealing of the cylinder liner 22. The inclined plate 94 can move in the inclined groove of the flow-blocking ring 71, which can provide a connection between the movable rod 91 and the inclined plate 94. The vertical movement of 4 provides the conditions for the movement of the piston rings. When one gas supply pipe 82 supplies gas to the dispersion housing 81 and the movable rod 91, the movable rod 91 can drive the inclined plate 94 to move upward. When the other gas supply pipe 82 exhausts gas from the dispersion housing 81 and the movable rod 91, the movable rod 91 can drive the inclined plate 94 to move downward. In summary, the alternating operation of the two gas supply pipes 82 will realize the lifting and lowering of the movable rod 91 and the inclined plate 94, which can drive the three piston rings 7 to rotate synchronously and slowly in a small circumferential direction. This effectively ensures the uniformity of wear of the sealing ring 72 and prevents its one-sided wear. At the same time, it effectively ensures the uniformity of heat dissipation of the sealing ring 72 and prevents its local overheating, thereby extending the service life of the piston ring 7.

[0065] Example 4, based on Example 3, a hydrogen compressor, such as... Figures 1-4 The application of a reciprocating hydrogen compressor assembly in a hydrogen compressor, which also includes a connecting mechanism 3, a top cover mechanism 4, and a cooling system, specifically:

[0066] like Figures 2-3 A connecting mechanism 3 is provided at the top of the working mechanism 2. The connecting mechanism 3 is used to control the entry and exit of hydrogen gas into or out of the working mechanism 2. The connecting mechanism 3 includes a connecting plate 31 and a valve assembly 32. The connecting plate 31 is located at the top of the cylinder body 21. The interior of the connecting plate 31 is divided into an inlet space and an outlet space, and a valve assembly 32 is fixedly installed in both the inlet space and the outlet space. The valve assembly 32 consists of a valve seat, a one-way valve, and a bolt. One valve assembly 32 is used to input hydrogen gas into the working mechanism 2, and the other valve assembly 32 is used to output hydrogen gas from the working mechanism 2. That is, the two valve assemblies 32 rely entirely on the working mechanism 2 and the connecting mechanism. The pressure difference of the gas between the components 3 enables automatic opening or closing without the need for an additional drive mechanism. Specifically, when the piston 6 moves downward and the pressure inside the working mechanism 2 is lower than the pressure inside the inlet space of the connecting mechanism 3, the gas pressure can push open the gas valve assembly 32 in the inlet space to allow hydrogen to enter the working mechanism 2. When the piston 6 reaches the bottom dead center, the pressure difference decreases and the gas valve assembly 32 closes. When the piston 6 moves upward and compresses the hydrogen, and the pressure inside the working mechanism 2 is higher than the pressure inside the outlet space of the connecting mechanism 3, the gas pressure pushes open the gas valve assembly 32 in the outlet space, and the high-pressure hydrogen is discharged. The exhaust ends and the gas valve assembly 32 closes.

[0067] like Figures 2-3 The top of the connecting mechanism 3 is provided with a top cover mechanism 4. The top cover mechanism 4 is used to realize the delivery of hydrogen in the hydrogen compressor. The top cover mechanism 4 includes a cover body 41 and a delivery pipe 42. The cover body 41 is connected to the top of the cylinder 21 by bolts, and the bolts pass through the connecting plate 31. The connecting plate 31 separates the air inlet space and the air outlet space through the cover body 41. Both ends of the cover body 41 are fitted with delivery pipes 42. One delivery pipe 42 is used to input hydrogen into the air inlet space, and the other delivery pipe 42 is used to output hydrogen from the air outlet space, so as to realize the continuous operation of the hydrogen compressor.

[0068] A cooling system is provided between the cylinder block 21 and the cylinder liner 22. The water or air in the cooling system removes the heat from the compressed hydrogen to reduce the temperature of the hydrogen during movement and ensure the safety of hydrogen transportation.

[0069] The working principle of this invention is as follows:

[0070] When the hydrogen compressor is working, the power motor 12 starts to drive the transmission mechanism 5, thereby pushing the piston 6 to reciprocate linearly within the working mechanism 2. This changes the working volume within the working mechanism 2, allowing hydrogen to enter from one end of the top cover mechanism 4, be compressed by the working mechanism 2, and then exit from the other end of the top cover mechanism 4. During this process, because the piston ring 7 is composed of a flow-blocking ring 71 and a sealing ring 72, the flow-blocking ring 71 can share the stress borne by the sealing ring 72 and constrain its deformation space. This effectively prevents the sealing ring 72 from deforming inward under high temperature and high pressure, thus improving the creep resistance of the sealing ring 72. Consequently, the gap between the sealing ring 72 and the cylinder liner 22 remains within a safe range, improving the sealing performance between the sealing ring 72 and the cylinder liner 22, ensuring the compression efficiency of the piston 6 for hydrogen, and extending the service life of the piston ring 7.

[0071] Meanwhile, the auxiliary mechanism 8 is used to dissipate heat from the piston body 6 and piston ring 7. Specifically, firstly, cooling gas is introduced into the dispersion housing 81 through a gas supply pipe 82. Then, the cooling gas is evenly distributed into each moving rod 91. Due to the uniform design of the inclined plate 94 on the moving rod 91 and the uniform design of the inclined groove on the flow-blocking ring 71, the heat transfer between the piston ring 7 and the auxiliary mechanism 8 can be increased, which can effectively reduce the temperature of the piston ring 7, thereby slowing down the rate of creep of the sealing ring 72, further improving the sealing performance between the sealing ring 72 and the cylinder liner 22, ensuring the compression efficiency of the piston body 6, and extending the service life of the piston ring 7. Afterward, the cooling gas in the dispersion housing 81 is discharged through another gas supply pipe 82.

[0072] During this process, due to the snap-fit ​​design of the inclined plate 94 and the flow-blocking ring 71, the three moving parts 9 jointly restrict the three piston rings 7, ensuring that the openings of the three piston rings 7 are always in a preset misaligned state. This effectively prevents the openings of the three piston rings 7 from aligning and affecting the sealing performance of the cylinder liner 22. At the same time, if the amount of cooling gas in the dispersion housing 81 increases, the gas pressure pushes the moving rod 91 upward and drives the inclined plate 94 to move upward synchronously. If the amount of cooling gas in the dispersion housing 81 decreases, the inclined plate 94 pushes the moving rod 91 downward and drives the inclined plate 94 to move downward synchronously. Thus, the moving rod 91 and the inclined plate 94 will produce a vertical movement operation, which can push the three piston rings 7 to perform a small circumferential rotation synchronously and slowly. This effectively ensures the uniformity of wear of the sealing ring 72 and prevents its one-sided wear. At the same time, it effectively ensures the uniformity of heat dissipation of the sealing ring 72 and prevents its local overheating, thereby extending the service life of the piston ring 7.

[0073] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piston-type hydrogen compressor assembly, characterized in that, include: Cylinder body (21) and cylinder liner (22), wherein the cylinder body (21) is fixedly sleeved with the cylinder liner (22) in the middle. Piston body (6), the piston body (6) is movably disposed in the middle of the cylinder liner (22), and the piston body (6) and the cylinder liner (22) are coaxially disposed; Piston ring (7), the side wall of the piston body (6) is provided with three limiting grooves, and the piston ring (7) is movably engaged in the limiting groove of the piston body (6), and the piston ring (7) is provided with an opening. The piston ring (7) includes a flow-blocking ring (71) and a sealing ring (72). The cross-section of the flow-blocking ring (71) is a T-shape rotated 90 degrees, and the flow-blocking ring (71) is fixedly embedded in the inner ring wall of the sealing ring (72). The outer ring wall of the sealing ring (72) is in contact with the inner wall of the cylinder liner (22). The material of the flow-blocking ring (71) is metal, and the material of the sealing ring (72) is filled with polytetrafluoroethylene material. The flow-blocking ring (71) can share the stress borne by the sealing ring (72) and constrain the deformation space of the sealing ring (72).

2. The reciprocating hydrogen compressor assembly according to claim 1, characterized in that, The openings of the three piston rings (7) are staggered, and the angle between each pair is 120 degrees.

3. The reciprocating hydrogen compressor assembly according to claim 2, characterized in that, The cylinder body (21) and cylinder liner (22) together constitute the working mechanism (2), and a fixing mechanism (1) is provided at the bottom end of the working mechanism (2). The fixing mechanism (1) includes: The top end of the body (11) is connected to the bottom end of the cylinder (21) by bolts; A power motor (12) is fixedly sleeved on one side of the body (11).

4. The reciprocating hydrogen compressor assembly according to claim 3, characterized in that, A transmission mechanism (5) is provided between the fixed mechanism (1) and the working mechanism (2), and the transmission mechanism (5) includes: A rotating shaft (51), one end of which is movably connected to a power motor (12); The crankshaft (52) has the other end of the rotating shaft (51) fixedly connected to the middle part of the crankshaft (52); The lower connecting rod (53) is movably connected at one end of the crankshaft (52) to one end of the lower connecting rod (53); The cross rod (54) has one end of the lower connecting rod (53) movably connected to one end of the cross rod (54); The other end of the cross rod (54) is movably connected to the middle of the upper connecting rod (55); The piston rod (56) is fixedly connected to the bottom end of the piston body (6) at its top end, and the bottom ends of the piston rod (56) are movably connected to the two ends of the upper connecting rod (55) on both sides.

5. The reciprocating hydrogen compressor assembly according to claim 4, characterized in that, The inner wall of the flow-blocking ring (71) has several inclined grooves.

6. The reciprocating hydrogen compressor assembly according to claim 5, characterized in that, An auxiliary mechanism (8) is provided inside the piston body (6), and the auxiliary mechanism (8) includes: The bottom end of the piston body (6) is fixedly connected to the dispersion shell (81), and the dispersion shell (81) has an annular cavity inside; The gas supply pipe (82) has one end fixedly connected to the bottom end of the annular cavity of the dispersion shell (81), and the other end of the gas supply pipe (82) passes through the machine body (11) and is connected to the cooling gas pump. There are two gas supply pipes (82), one gas supply pipe (82) is used for filling gas and the other gas supply pipe (82) is used for exhausting gas. The two gas supply pipes (82) do not work at the same time. The movable part (9) is movably sleeved at the top of the annular cavity of the dispersion shell (81), and the three movable parts (9) are evenly arranged around the piston body (6).

7. The reciprocating hydrogen compressor assembly according to claim 6, characterized in that, The movable component (9) includes: The piston body (6) has three movable grooves at its bottom end, and the upper half of the movable rod (91) is movably sleeved with the movable grooves of the piston body (6), and the lower half of the movable rod (91) is movably sleeved with the top surface of the dispersion shell (81). Movable block (92), the bottom surface of the bottom end of the movable rod (91) is fixedly connected to the movable block (92); A sealing membrane (93) is fixedly connected between the bottom top surface of the movable rod (91) and the inner top surface of the dispersion shell (81), and the sealing membrane (93) is elastic; An inclined plate (94) is provided in the piston body (6), and an active cavity is provided in the piston body (6). An active groove is vertically connected to three active cavities, and a limiting groove is horizontally connected to three active cavities. An inclined plate (94) is fixedly connected to the outer wall of the active cavity (61). Several inclined plates (94) arranged in a ring form an inclined plate (94). One of the inclined plates (94) extends out of the active cavity and into the limiting groove. The end of the inclined plate (94) is engaged with the inclined groove of the flow-blocking ring (71). The inclined plate (94) can move in the inclined groove of the flow-blocking ring (71).

8. A hydrogen compressor, characterized in that, When the reciprocating hydrogen compressor assembly of claim 7 is used in a hydrogen compressor, the hydrogen compressor further includes: A connecting mechanism (3) is provided at the top of the working mechanism (2); Top cover mechanism (4), the top of the connecting mechanism (3) is provided with top cover mechanism (4).

9. The hydrogen compressor according to claim 8, characterized in that, The connecting mechanism (3) includes: A connecting plate (31) is disposed at the top of the cylinder body (21); The gas valve assembly (32) is divided into an air inlet space and an air outlet space inside the connecting plate (31), and a gas valve assembly (32) is fixedly installed in both the air inlet space and the air outlet space. One of the gas valve assemblies (32) is used to input hydrogen into the working mechanism (2), and the other gas valve assembly (32) is used to output hydrogen from the working mechanism (2).

10. The hydrogen compressor according to claim 9, characterized in that, The top cover mechanism (4) includes: Cover (41), which is connected to the top of cylinder (21) by bolts and the bolts pass through connecting plate (31). The connecting plate (31) separates the air inlet space and the air outlet space through the cover (41). Both ends of the cover (41) are fitted with a conveying pipe (42). One conveying pipe (42) is used to input hydrogen into the air inlet space, and the other conveying pipe (42) is used to output hydrogen from the air outlet space.

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