Built-in isolation cavity structure of hydraulic cylinder of hydrogen compressor
By integrating the hydraulic cylinder and isolation chamber of the hydrogen compressor into one unit, the complexity of traditional structures and the problem of coaxiality control are solved, achieving high-precision operation and improved safety of the equipment, simplifying installation and maintenance, and preventing oil and gas leaks.
Patent Information
- Application Number
- CN202520530674.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Traditional hydrogen compressors have two independent components: the hydraulic cylinder and the isolation chamber. This results in a complex structure, difficult installation and maintenance, and difficulty in controlling coaxiality. It is also prone to vibration, noise, oil leakage and gas leakage, which affect the stability and safety of the equipment.
A structure with an internal isolation chamber for a hydrogen compressor hydraulic cylinder is designed, which integrates the hydraulic cylinder and the isolation chamber into one unit. The hydraulic cylinder barrel is divided into a hydraulic oil chamber and an isolation chamber by a cylinder sealing stuffing box and a stuffing box plug. This simplifies the structure and controls coaxiality. Oil and gas leakage discharge holes are provided to ensure sealing.
It simplifies the overall structure, reduces assembly difficulty, improves equipment operating accuracy and stability, prevents leakage, ensures safety and reliability, and allows for timely handling of leaked media.
Smart Images
Figure CN223708148U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of hydraulic cylinders for hydrogen compressors, and in particular relates to a built-in isolation chamber structure for a hydraulic cylinder for a hydrogen compressor. Background Technology
[0002] Hydrogen compressors have wide applications in industrial production, especially in the energy and chemical industries. Traditional hydrogen compressors typically design the hydraulic cylinder and isolation chamber as two separate components, bolted together. While this design meets functional requirements to some extent, it also has some significant drawbacks.
[0003] First, the traditional structure is complex because the hydraulic cylinder and the isolation chamber are two separate components, making installation and maintenance difficult. Second, since the two components are connected by bolts, coaxiality is difficult to control, which can easily lead to vibration and noise during operation, affecting the stability and service life of the equipment. Furthermore, oil and air leaks are prone to occur at the connection points, affecting not only the equipment's sealing performance but also potentially causing safety hazards. Utility Model Content
[0004] In view of this, the present invention aims to propose a structure with an internal isolation chamber for a hydrogen compressor hydraulic cylinder, in order to solve the problems that hydraulic cylinders and isolation chambers are usually designed as two independent components, resulting in a complex overall structure, difficult installation and maintenance, and difficulty in controlling coaxiality.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a built-in isolation chamber structure for a hydrogen compressor hydraulic cylinder, comprising a hydraulic cylinder barrel, a piston rod, a cylinder piston, and two cylinder sealing stuffing boxes. The piston rod is axially movably inserted into the hydraulic cylinder barrel, and the cylinder piston is disposed in the middle of the piston rod. The cylinder piston slides in cooperation with the inner wall of the hydraulic cylinder barrel. The two cylinder sealing stuffing boxes are symmetrically sleeved on the piston rod on both sides of the cylinder piston. The outer wall of the cylinder sealing stuffing box is connected to the inner wall of the hydraulic cylinder barrel. Cylinder end caps are symmetrically disposed at both ends of the hydraulic cylinder barrel. The space between the cylinder sealing stuffing boxes and the cylinder end caps in the hydraulic cylinder barrel forms an isolation chamber, and the space between the two cylinder sealing stuffing boxes in the hydraulic cylinder barrel forms a hydraulic oil chamber.
[0006] Furthermore, the inner wall of the hydraulic cylinder barrel is provided with a limiting step that cooperates with the outer wall of the cylinder sealing stuffing box.
[0007] Furthermore, a stuffing plug is provided on one side of the hydraulic cylinder sealing stuffing box, and the outer ring wall of the stuffing plug is connected to the inner wall of the hydraulic cylinder barrel by a thread.
[0008] Furthermore, the inner ring of the stuffing box plug is clearance-fitted with the piston rod.
[0009] Furthermore, an oil scraper ring is provided on the inner side of the cylinder sealing stuffing box, and the piston rod slides through the oil scraper ring and contacts and engages with the inner ring of the oil scraper ring.
[0010] Furthermore, a sealing ring is provided on the inner side of the cylinder sealing stuffing box, and the piston rod slides through the sealing ring and contacts and engages with the inner ring of the sealing ring.
[0011] Furthermore, two oil inlets are provided on the side wall of the hydraulic oil chamber, and the two oil inlets are symmetrically arranged along the middle of the hydraulic cylinder barrel.
[0012] Furthermore, the cylinder end cover is provided with an oil drain hole and an oil drain pipe. The oil drain hole is located at the bottom of the cylinder end cover and is connected to the isolation chamber through the oil drain pipe.
[0013] Furthermore, the cylinder end cover is provided with a vent hole and an exhaust pipe. The vent hole is located on the top of the cylinder end cover and is connected to the isolation chamber through the exhaust pipe.
[0014] Furthermore, an end cap sealing plug is provided on the inner side of the cylinder end cap, and the piston rod slides through the end cap sealing plug and contacts and engages with the inner ring of the end cap sealing plug.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. This utility model provides a structure for an internal isolation chamber in a hydraulic cylinder of a hydrogen compressor. By merging and integrating the hydraulic cylinder and the isolation chamber, the hydraulic cylinder barrel is divided into two parts: a hydraulic oil chamber and an isolation chamber by having an internal cylinder sealing stuffing box and a stuffing box plug. This simplifies the overall structure, reduces the number of parts, and lowers the assembly difficulty.
[0017] 2. This utility model provides a built-in isolation chamber structure for a hydrogen compressor hydraulic cylinder. Since the isolation chamber and the hydraulic oil chamber are both inside the same hydraulic cylinder barrel, the coaxiality can be controlled within a very small range, avoiding the coaxiality deviation problem that may occur when connected by bolts in traditional structures, thus improving the operating accuracy and stability of the equipment.
[0018] 3. This utility model provides a built-in isolation chamber structure for a hydrogen compressor hydraulic cylinder. The isolation chamber can completely prevent leaked hydrogen or hydraulic oil from entering the oil cylinder or pneumatic cylinder, effectively preventing oil leakage from the oil cylinder from entering the pneumatic cylinder along with the hydraulic rod, thus improving the safety and reliability of the equipment. The isolation chamber is equipped with hydraulic oil leakage discharge holes and hydrogen leakage discharge holes, further ensuring the timely discharge and treatment of leaked media. Attached Figure Description
[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0020] Figure 1 This is a schematic diagram of the overall structure of the built-in isolation chamber structure of the hydraulic cylinder of the hydrogen compressor described in this utility model;
[0021] Figure 2 This is a front view schematic diagram of a built-in isolation chamber structure for a hydrogen compressor hydraulic cylinder according to the present invention;
[0022] Figure 3 This is a cross-sectional view of the internal isolation chamber structure of a hydrogen compressor hydraulic cylinder according to the present invention.
[0023] 1-Hydraulic cylinder barrel, 2-Piston rod, 3-Cylinder piston, 4-Cylinder sealing stuffing box, 5-Cylinder end cover, 6-Isolation chamber, 7-Hydraulic oil chamber, 8-Stuffing box plug, 9-Limit step, 10-Oil inlet, 11-Air leakage discharge hole, 12-Oil leakage discharge hole, 13-End cover sealing plug. 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. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.
[0025] See Figure 1-3This embodiment describes a hydrogen compressor hydraulic cylinder with an internal isolation chamber structure. It includes a hydraulic cylinder barrel 1, a piston rod 2, a cylinder piston 3, and two cylinder sealing stuffing boxes 4. The piston rod 2 is axially movable within the hydraulic cylinder barrel 1. The cylinder piston 3 is located at the middle of the piston rod 2, and the cylinder piston 3 slides against the inner wall of the hydraulic cylinder barrel 1. The two cylinder sealing stuffing boxes 4 are symmetrically fitted onto the piston rod 2 on both sides of the cylinder piston 3. The outer wall of the cylinder sealing stuffing box 4 is connected to the inner wall of the hydraulic cylinder barrel 1. The hydraulic cylinder barrel 1 is symmetrically provided with cylinder end caps 5 at both ends. The space between the cylinder sealing stuffing box 4 and the cylinder end cap 5 in the hydraulic cylinder barrel 1 forms an isolation cavity 6. The space between the two cylinder sealing stuffing boxes 4 in the hydraulic cylinder barrel 1 forms a hydraulic oil cavity 7. By merging and integrating the hydraulic cylinder and the isolation cavity 6, the hydraulic cylinder barrel 1 is divided into two parts, the hydraulic oil cavity 7 and the isolation cavity 6, by using the cylinder sealing stuffing box 4 and the stuffing box plug 8 inside the hydraulic cylinder barrel 1. This simplifies the overall structure, reduces the number of parts, and reduces the assembly difficulty.
[0026] In this embodiment, since the isolation chamber 6 and the hydraulic oil chamber 7 are both inside the same hydraulic cylinder barrel 1, the coaxiality can be controlled within a very small range, avoiding the coaxiality deviation problem that may occur when connected by bolts in traditional structures, thus improving the operating accuracy and stability of the equipment.
[0027] In this embodiment, the isolation chamber 6 can completely prevent leaked hydrogen or hydraulic oil from entering the oil cylinder or air cylinder, effectively preventing oil leakage from the oil cylinder from entering the air cylinder with the hydraulic rod, thus improving the safety and reliability of the equipment. The isolation chamber is equipped with hydraulic oil leakage discharge holes and hydrogen leakage discharge holes, further ensuring the timely discharge and treatment of leaked media.
[0028] In this embodiment, the inner wall of the hydraulic cylinder barrel 1 is provided with a limiting step 9 that cooperates with the outer wall of the cylinder sealing stuffing box 4. The limiting step 9 is used to limit the cylinder sealing stuffing box 4 in one direction.
[0029] In this embodiment, a stuffing plug 8 is provided on one side of the hydraulic cylinder sealing stuffing box 4. The outer ring wall of the stuffing plug 8 is connected to the inner wall of the hydraulic cylinder barrel 1 by a thread. The stuffing plug 8 is made of 45# steel and is used to restrict the movement of the hydraulic cylinder sealing stuffing box 4 in the hydraulic cylinder barrel 1.
[0030] In this embodiment, the hydraulic cylinder sealing stuffing box 4 is restricted from moving within the hydraulic cylinder barrel 1 by the combined action of the limiting step 9 and the stuffing box plug 8.
[0031] In this embodiment, an oil scraper ring is provided on the inner side of the cylinder sealing stuffing box 4. The piston rod 2 slides through the oil scraper ring and contacts and cooperates with the inner ring of the oil scraper ring. The oil scraper ring is used to scrape off the residual oil on the piston rod 2 that is reciprocating, and to prevent the residual oil on the piston rod 2 from entering the cylinders on both sides of the hydraulic cylinder barrel 1 along with the piston rod 2.
[0032] In this embodiment, the inner ring of the stuffing box plug 8 is fitted with the piston rod 2 with a clearance. The oil scraped off by the oil scraper ring from the piston rod 2 flows into the isolation chamber 6 through the gap between the inner ring of the stuffing box plug 8 and the piston rod 2, and is discharged through the isolation chamber 6.
[0033] In this embodiment, a sealing ring is provided on the inner side of the cylinder sealing stuffing box 4. The piston rod 2 slides through the sealing ring and contacts and cooperates with the inner ring of the sealing ring. The sealing ring is used to ensure the sealing performance of the cylinder sealing stuffing box 4, effectively blocking the hydraulic oil in the cylinder, ensuring the sealing performance of the hydraulic system, preventing hydraulic oil leakage, and improving the efficiency and reliability of the system.
[0034] In this embodiment, two oil inlets 10 are provided on the side wall of the hydraulic oil chamber 7. The two oil inlets 10 are symmetrically arranged along the middle of the hydraulic cylinder barrel 1. The oil inlets 10 are used for supplying and discharging oil into the hydraulic oil chamber 7.
[0035] In this embodiment, the cylinder end cover 5 is provided with an oil leakage discharge hole 12 and an oil drain pipe. The oil leakage discharge hole 12 is located at the bottom of the cylinder end cover 5 and is connected to the isolation chamber 6 through the oil drain pipe. The cylinder end cover 5 is provided with a gas leakage discharge hole 11 and an exhaust pipe. The gas leakage discharge hole 11 is located at the top of the cylinder end cover 5 and is connected to the isolation chamber 6 through the exhaust pipe. Hydrogen and oil in the isolation chamber 6 are discharged through the gas leakage discharge hole 11 and the oil leakage discharge hole 12, respectively. The isolation chamber 6 can completely prevent hydrogen leaking from the cylinders on both sides of the hydraulic cylinder from entering the cylinder or oil leaking from the hydraulic cylinder from entering the cylinders on both sides of the hydraulic cylinder, thereby improving the safety and reliability of the equipment. The hydraulic oil leakage discharge hole 12 and the hydrogen leakage discharge hole 11 on the cylinder end cover 5 further ensure the timely discharge and treatment of leaked media.
[0036] In this embodiment, an end cap sealing plug 13 is provided on the inner side of the cylinder end cap 5. The piston rod 2 slides through the end cap sealing plug 13 and contacts and cooperates with the inner ring of the end cap sealing plug 13. The end cap sealing plug 13 is used to ensure the sealing performance of the cylinder end cap 5.
[0037] In this embodiment, the stroke length of the isolation chamber 6 is determined by changing the length of the hydraulic cylinder barrel 1 and the position of the built-in cylinder sealing packing gland 4 according to the stroke of the cylinder, so as to adapt to different working requirements and improve the versatility and adaptability of the equipment.
[0038] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.
Claims
1. A structure with an internal isolation chamber in a hydraulic cylinder of a hydrogen compressor, characterized in that: It includes a hydraulic cylinder barrel (1), a piston rod (2), a cylinder piston (3), and two cylinder sealing stuffing boxes (4). The piston rod (2) is axially movably inserted into the hydraulic cylinder barrel (1). The cylinder piston (3) is provided in the middle of the piston rod (2). The cylinder piston (3) slides with the inner wall of the hydraulic cylinder barrel (1). The two cylinder sealing stuffing boxes (4) are symmetrically sleeved on the piston rod (2) on both sides of the cylinder piston (3). The outer wall of the cylinder sealing stuffing box (4) is connected to the inner wall of the hydraulic cylinder barrel (1). Cylinder end caps (5) are symmetrically provided at both ends of the hydraulic cylinder barrel (1). The space between the cylinder sealing stuffing box (4) and the cylinder end cap (5) in the hydraulic cylinder barrel (1) forms an isolation cavity (6). The space between the two cylinder sealing stuffing boxes (4) in the hydraulic cylinder barrel (1) forms a hydraulic oil cavity (7).
2. The built-in isolation chamber structure of a hydrogen compressor hydraulic cylinder according to claim 1, characterized in that: The inner wall of the hydraulic cylinder barrel (1) is provided with a limiting step (9) that cooperates with the outer wall of the cylinder sealing stuffing box (4).
3. The hydrogen compressor hydraulic cylinder built-in isolation chamber structure according to claim 1, characterized in that: A stuffing plug (8) is provided on one side of the hydraulic cylinder sealing stuffing box (4), and the outer ring wall of the stuffing plug (8) is connected to the inner wall of the hydraulic cylinder barrel (1) by a thread.
4. The hydrogen compressor hydraulic cylinder built-in isolation chamber structure according to claim 3, characterized in that: The inner ring of the stuffing gland plug (8) is clearance-fitted with the piston rod (2).
5. The built-in isolation chamber structure of a hydrogen compressor hydraulic cylinder according to claim 1, characterized in that: An oil scraper ring is provided on the inner side of the oil cylinder sealing stuffing box (4), and the piston rod (2) slides through the oil scraper ring and contacts and cooperates with the inner ring of the oil scraper ring.
6. The built-in isolation chamber structure of a hydrogen compressor hydraulic cylinder according to claim 1, characterized in that: A sealing ring is provided on the inner side of the cylinder sealing stuffing box (4), and the piston rod (2) slides through the sealing ring and contacts and cooperates with the inner ring of the sealing ring.
7. The built-in isolation chamber structure of a hydrogen compressor hydraulic cylinder according to claim 1, characterized in that: Two oil inlets (10) are provided on the side wall of the hydraulic oil chamber (7), and the two oil inlets (10) are symmetrically arranged along the middle of the hydraulic cylinder barrel (1).
8. The hydrogen compressor hydraulic cylinder built-in isolation chamber structure according to claim 1, characterized in that: The cylinder end cover (5) is provided with an oil drain hole (12) and an oil drain pipe. The oil drain hole (12) is located at the bottom of the cylinder end cover (5) and is connected to the isolation chamber (6) through the oil drain pipe.
9. The hydrogen compressor hydraulic cylinder built-in isolation chamber structure according to claim 1, characterized in that: The cylinder end cover (5) is provided with a leakage discharge hole (11) and an exhaust pipe. The leakage discharge hole (11) is located on the top of the cylinder end cover (5) and is connected to the isolation chamber (6) through the exhaust pipe.
10. The hydrogen compressor hydraulic cylinder built-in isolation chamber structure according to claim 1, characterized in that: The cylinder end cap (5) is provided with an end cap sealing plug (13) on its inner side. The piston rod (2) slides through the end cap sealing plug (13) and contacts and engages with the inner ring of the end cap sealing plug (13).