Ceramic rod sleeve jacking structure device of hydrogen compressor

Abstract

The utility model provides a ceramic rod sleeve jacking structure device of a hydrogen compressor, and belongs to the technical field of hydrogen compressors. The problems that an existing ceramic rod sleeve cannot achieve accurate axial positioning, rigid contact between the end of the ceramic rod sleeve and an adjacent component can cause local stress overrun, the rod sleeve cracks and even breaks into pieces to lose efficacy, and the operation reliability of equipment is seriously affected are solved. The hydraulic cylinder comprises an oil cylinder sleeve, an air cylinder sleeve, an oil cylinder piston, an air cylinder piston, a piston rod and a ceramic rod sleeve, the oil cylinder sleeve and the air cylinder sleeve are coaxially arranged and connected through a cylinder base, and the oil cylinder piston and the air cylinder piston are arranged in the oil cylinder sleeve and the air cylinder sleeve respectively in a sliding mode. The piston rod penetrates through the cylinder base in a sliding mode to extend to the cylinder sleeve and the oil cylinder sleeve, the piston rod is connected with the oil cylinder piston and the cylinder piston, and the ceramic rod sleeve is arranged on the piston rod between the oil cylinder piston and the cylinder piston in a sleeving mode. The ceramic rod sleeve is mainly used for the hydrogen compressor.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen compressor technology, and in particular relates to a ceramic rod sleeve clamping structure device for a hydrogen compressor. Background Technology

[0002] As a key piece of equipment in the hydrogen energy industry chain, the core function of a hydrogen compressor is to achieve efficient compression of hydrogen through the reciprocating motion of a piston rod. As the driving component, the piston rod operates under high pressure and high speed conditions for extended periods, making frictional wear between its surface and the seals, as well as hydrogen embrittlement, particularly prominent. Especially in double-acting compression cylinders, the piston rod must withstand bidirectional loads, placing extremely high demands on the mechanical properties and surface hardness of the materials.

[0003] In traditional hydrogen compressors, piston rods are often made of hydrogen-resistant materials (such as high-strength stainless steel and nickel-based alloys) to cope with hydrogen embrittlement in a hydrogen environment. However, while these materials possess good resistance to hydrogen embrittlement, their surface hardness often falls short of the standards required for seals. Even with surface hardening treatments (such as nitriding and chrome plating), problems such as uneven layer thickness and insufficient bonding strength remain. This makes the piston rod prone to scoring and scratches during high-speed reciprocating motion, leading to seal failure, hydrogen leakage, and other safety hazards.

[0004] To compensate for the insufficient surface hardness of materials resistant to hydrogen embrittlement, existing technologies often employ a ceramic sleeve attached to the outer surface of the piston rod. Ceramic materials possess extremely high hardness and wear resistance, significantly reducing frictional losses between the piston rod and the seals. However, the inherent brittleness of ceramic materials makes them highly susceptible to fracture under dynamic loads due to stress concentration or end-face impact. Especially during compressor start-up, shutdown, or sudden load changes, if the ceramic sleeve cannot achieve precise axial positioning, the rigid contact between its end and adjacent components (such as the piston or end cap) will lead to excessive local stress, causing the sleeve to fracture or even fragment, severely impacting the reliability of equipment operation. Utility Model Content

[0005] In view of this, the present invention aims to propose a ceramic rod sleeve clamping structure device for hydrogen compressors, in order to solve the problem that existing ceramic rod sleeves cannot achieve precise axial positioning, and the rigid contact between their ends and adjacent components will lead to excessive local stress, causing the rod sleeve to break or even fragment and fail, seriously affecting the reliability of equipment operation.

[0006] To achieve the above object, the utility model discloses the following technical scheme: a kind of hydrogen compressor ceramic rod sleeve top structure device, it includes oil cylinder cover, cylinder cover, oil cylinder piston, cylinder piston, piston rod and ceramic rod sleeve, the oil cylinder cover and cylinder cover coaxial arrangement, the oil cylinder cover is connected between cylinder cover by cylinder base, the oil cylinder piston and cylinder piston are respectively slidably arranged in oil cylinder cover and cylinder cover, the piston rod extends to cylinder cover and oil cylinder cover by sliding through cylinder base, the piston rod is connected oil cylinder piston and cylinder piston respectively, the ceramic rod sleeve is set on the piston rod between oil cylinder piston and cylinder piston, the ceramic rod sleeve passes through cylinder base and is slidably matched with cylinder base, first spacer ring is arranged between the oil cylinder piston and the ceramic rod sleeve, one end of the first spacer ring is connected with the oil cylinder piston, the other end of the first spacer ring is connected with one end of the ceramic rod sleeve, one end of the cylinder piston is connected with the other end of the ceramic rod sleeve.

[0007] Further, one end of the oil cylinder piston is provided with an insertion slot, and one end of the first spacer ring is inserted and matched with the insertion slot.

[0008] Further, a second spacer ring is arranged between the piston rod and the oil cylinder piston, and a groove matched with the second spacer ring is formed in the outer wall of the piston rod.

[0009] Further, a first positioning groove is formed in the other end of the first spacer ring, and one end of the ceramic rod sleeve abuts in the first positioning groove.

[0010] Further, a second positioning groove is formed in one end of the cylinder piston, and the other end of the ceramic rod sleeve abuts in the second positioning groove.

[0011] Further, a super nut is arranged at the other end of the cylinder piston, the super nut comprises a gland nut and a plurality of compression screws, a first screw hole is formed in the center of the gland nut, one end of the piston rod passes through the cylinder piston and is screwed with the first screw hole of the gland nut, a plurality of second screw holes are uniformly formed in the periphery of the gland nut around the first screw hole, the compression screws are screwed on the second screw holes, and the bottom end of the compression screws abuts one end of the cylinder piston.

[0012] Further, a compression washer is arranged between the gland nut and the cylinder piston, the compression washer is sleeved on the piston rod, the bottom end of the compression screw abuts one side of the compression washer, and the other side of the compression washer is in contact with one end of the cylinder piston.

[0013] Further, the material of the oil cylinder piston is 45# steel.

[0014] Further, the materials of the first spacer ring and the second spacer ring are both 45# steel.

[0015] Further, the material of the cylinder piston is a hydrogen embrittlement resistant material.

[0016] Compared with the prior art, the hydrogen compressor ceramic rod sleeve structure device has the advantages that: the first and second separation rings are arranged on the oil cylinder piston at one end of the ceramic rod sleeve and the positioning groove is arranged on the cylinder piston at the other end of the ceramic rod sleeve to jointly limit the axial displacement of the ceramic rod sleeve, the super nut is arranged at one end of the cylinder piston, and the proper torque is applied through the compression washer and the compression screw, so that the axial displacement of the ceramic rod sleeve is prevented during the reciprocating operation of the ceramic rod sleeve along with the piston rod, and the ceramic rod sleeve can be always positioned in the axial direction, so that the damage caused by the collision of the end surface of the ceramic rod sleeve is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings are presented to provide an explanation of the present application, and are not meant to limit the present application. In the drawings:

[0018] Figure 1 The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings are presented to provide an explanation of the present application, and are not meant to limit the present application. In the drawings:

[0019] 1-oil cylinder sleeve, 2-cylinder sleeve, 3-oil cylinder piston, 4-cylinder piston, 5-piston rod, 6-ceramic rod sleeve, 7-cylinder seat, 8-first separation ring, 9-second separation ring, 10-pressing nut, 11-compression screw, 12-compression washer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present application, but not all the embodiments.

[0021] Referring to Figure 1The embodiment is illustrated by a hydrogen compressor ceramic rod sleeve top pressing structure device, which comprises an oil cylinder sleeve 1, a gas cylinder sleeve 2, an oil cylinder piston 3, a gas cylinder piston 4, a piston rod 5 and a ceramic rod sleeve 6. The oil cylinder sleeve 1 and the gas cylinder sleeve 2 are coaxially arranged, and the oil cylinder sleeve 1 and the gas cylinder sleeve 2 are connected through a cylinder base 7. The oil cylinder sleeve 1 and the gas cylinder sleeve 2 are respectively used for accommodating the reciprocating movement of the oil cylinder piston 3 and the gas cylinder piston 4. The oil cylinder piston 3 and the gas cylinder piston 4 are respectively slidably arranged in the oil cylinder sleeve 1 and the gas cylinder sleeve 2. The piston rod 5 extends to the gas cylinder sleeve 2 and the oil cylinder sleeve 1 through the cylinder base 7 and is slidably connected to the oil cylinder piston 3 and the gas cylinder piston 4. The ceramic rod sleeve 6 is sleeved on the piston rod 5 between the oil cylinder piston 3 and the gas cylinder piston 4. The ceramic rod sleeve 6 passes through the cylinder base 7 and is slidably connected to the cylinder base 7. A first spacer ring 8 is arranged between the oil cylinder piston 3 and the ceramic rod sleeve 6. One end of the first spacer ring 8 is connected to the oil cylinder piston 3, and the other end of the first spacer ring 8 is connected to one end of the ceramic rod sleeve 6. The other end of the ceramic rod sleeve 6 is connected to one end of the gas cylinder piston 4. The first spacer ring 8 arranged on one end of the oil cylinder piston 3 and the positioning groove arranged on the other end of the gas cylinder piston 4 jointly limit the axial displacement of the ceramic rod sleeve 6, thereby avoiding damage caused by the end face collision of the ceramic rod sleeve 6.

[0022] In the embodiment, a plug-in groove is arranged at one end of the oil cylinder piston 3, and one end of the first spacer ring 8 is plug-in connected to the plug-in groove. The plug-in groove is used for connecting the oil cylinder piston 3 and the first spacer ring 8.

[0023] In the embodiment, a second spacer ring 9 is arranged between the piston rod 5 and the oil cylinder piston 3. A groove is arranged on the outer wall of the piston rod 5 and matched with the second spacer ring 9. The second spacer ring 9 is used for connecting and fixing the piston rod 5 and the oil cylinder piston 3.

[0024] In the embodiment, a first positioning groove is arranged at the other end of the first spacer ring 8, and one end of the ceramic rod sleeve 6 is arranged in the first positioning groove. A second positioning groove is arranged at one end of the gas cylinder piston 4, and the other end of the ceramic rod sleeve 6 is arranged in the second positioning groove. The first positioning groove and the second positioning groove are respectively used for top pressing and limiting the two ends of the ceramic rod sleeve 6, and jointly limit the axial displacement of the ceramic rod sleeve 6.

[0025] The other end of the cylinder piston 4 in the embodiment is provided with a super nut, which comprises a gland nut 10 and a plurality of compression screws 11. The center of the gland nut 10 is provided with a first threaded hole. One end of the piston rod 5 penetrates the cylinder piston 4 and is screwed with the first threaded hole of the gland nut 10. The one end of the piston rod 5 is provided with an external thread matched with the first threaded hole, which is used for the connection and fixation between the piston rod 5 and the gland nut 10. A plurality of second threaded holes are uniformly arranged around the first threaded hole of the gland nut 10 in the circumferential direction. The compression screws 11 are screwed on the second threaded holes. The bottom end of the compression screws 11 abuts against one end of the cylinder piston 4. The compression gasket 12 is arranged between the gland nut 10 and the cylinder piston 4. The compression gasket 12 is sleeved on the piston rod 5. The bottom end of the compression screw 11 abuts against one side of the compression gasket 12. The other side of the compression gasket 12 is in contact with one end of the cylinder piston 4. The compression gasket 12 plays a role in uniformly distributing the compression force. By arranging the super nut at one end of the cylinder piston 4 and applying appropriate torque through the compression gasket 12 and the compression screw 11, it is ensured that the ceramic rod sleeve 6 will not displace in the axial direction during the reciprocating operation of the piston rod 5. The ceramic rod sleeve 6 can always be well positioned in the axial direction, thereby avoiding damage caused by the end face collision of the ceramic rod sleeve 6.

[0026] The tightening torque of the compression screw 11 in the embodiment needs to be calculated according to the material mechanics performance and end face size of the ceramic rod sleeve 6. It is necessary to ensure that the ceramic rod sleeve 6 will not displace in the axial direction and prevent excessive tightening torque from damaging the ceramic rod sleeve 6. The calculation method of the tightening torque is the prior art, which is not described here.

[0027] The material of the piston rod 5 in the embodiment is a hydrogen embrittlement resistant material. The processing feature is that the entire piston rod 5 needs to have good coaxiality and external surface roughness. The piston rod 5 is provided with the cylinder piston 4, the oil cylinder piston 3 and the ceramic rod sleeve 6. During the reciprocating operation of the piston rod 5, the external surface of the piston rod 5 is prevented from being pulled.

[0028] The materials of the oil cylinder piston 3, the first spacer ring 8 and the second spacer ring 9 in the embodiment are all 45# steel.

[0029] The material of the cylinder piston 4 in the embodiment is a hydrogen embrittlement resistant material. The processing feature is that the external surface of the cylinder piston 4 has good coaxiality and surface roughness.

[0030] The above disclosed embodiments of the utility model are only used for helping the utility model to be described. The embodiments do not describe all the details, and also do not limit the utility model to be the specific implementation mode. According to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.

Claims

1. A hydrogen compressor ceramic rod gland structure device, characterized in that: It includes oil cylinder sleeve (1), cylinder sleeve (2), oil cylinder piston (3), cylinder piston (4), piston rod (5) and ceramic sleeve (6), the oil cylinder sleeve (1) and cylinder sleeve (2) are coaxially arranged, the oil cylinder sleeve (1) is connected with cylinder sleeve (2) through cylinder base (7), the oil cylinder piston (3) and cylinder piston (4) are respectively slidably arranged in oil cylinder sleeve (1) and cylinder sleeve (2), the piston rod (5) extends to cylinder sleeve (2) and oil cylinder sleeve (1) through cylinder base (7), the piston rod (5) is connected with oil cylinder piston (3) and cylinder piston (4) respectively, the ceramic sleeve (6) is sleeved on the piston rod (5) between oil cylinder piston (3) and cylinder piston (4), the ceramic sleeve (6) passes through cylinder base (7) and is slidably connected with cylinder base (7), the first spacer ring (8) is arranged between the oil cylinder piston (3) and the ceramic sleeve (6), one end of the first spacer ring (8) is connected with the oil cylinder piston (3), the other end of the first spacer ring (8) is connected with one end of the ceramic sleeve (6), and the other end of the ceramic sleeve (6) is connected with one end of the cylinder piston (4).

2. A hydrogen compressor ceramic rod gland structure device according to claim 1, characterized in that: One end of the oil cylinder piston (3) is provided with a plug-in slot, and one end of the first spacer ring (8) is plug-in matched with the plug-in slot.

3. A hydrogen compressor ceramic rod gland structure device according to claim 2, characterized in that: The second spacer ring (9) is arranged between the piston rod (5) and the oil cylinder piston (3), and a groove is formed in the outer wall of the piston rod (5) and matched with the second spacer ring (9).

4. A hydrogen compressor ceramic rod gland structure apparatus according to claim 3, characterized in that: The other end of the first spacer ring (8) is provided with a first positioning groove, and one end of the ceramic sleeve (6) is located in the first positioning groove.

5. A hydrogen compressor ceramic rod gland structure apparatus as claimed in claim 4, wherein: The other end of the first spacer ring (8) is provided with a first positioning groove, and one end of the ceramic sleeve (6) is located in the first positioning groove.

6. A hydrogen compressor ceramic rod gland structure apparatus as claimed in claim 5, wherein: The other end of the first spacer ring (8) is provided with a first positioning groove, and one end of the ceramic sleeve (6) is located in the first positioning groove.

7. A hydrogen compressor ceramic rod gland structure apparatus as claimed in claim 6, wherein: The other end of the first spacer ring (8) is provided with a first positioning groove, and one end of the ceramic sleeve (6) is located in the first positioning groove.

8. A hydrogen compressor ceramic rod gland structure apparatus as claimed in claim 1, wherein: The other end of the first spacer ring (8) is provided with a first positioning groove, and one end of the ceramic sleeve (6) is located in the first positioning groove.

9. A hydrogen compressor ceramic rod gland structure apparatus as claimed in claim 3, wherein: The other end of the first spacer ring (8) is provided with a first positioning groove, and one end of the ceramic sleeve (6) is located in the first positioning groove.

10. A hydrogen compressor ceramic rod gland structure apparatus as claimed in claim 1, wherein: The other end of the first spacer ring (8) is provided with a first positioning groove, and one end of the ceramic sleeve (6) is located in the first positioning groove. The other end of the first spacer ring (8) is provided with a first positioning groove, and one end of the ceramic sleeve (6) is located in the first positioning groove. The material of the oil cylinder piston (3) is 45# steel. The material of the first spacer ring (8) and the second spacer ring (9) is 45# steel. The material of the cylinder piston (4) is hydrogen embrittlement resistant material.

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