CN220909945U - Single-guide piston sealing structure of liquid hydrogen pump - Google Patents
Single-guide piston sealing structure of liquid hydrogen pump Download PDFInfo
- Publication number
- CN220909945U CN220909945U CN202322874402.1U CN202322874402U CN220909945U CN 220909945 U CN220909945 U CN 220909945U CN 202322874402 U CN202322874402 U CN 202322874402U CN 220909945 U CN220909945 U CN 220909945U
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- piston
- ring
- pump body
- sealing
- liquid hydrogen
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- 238000007789 sealing Methods 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 37
- 239000001257 hydrogen Substances 0.000 title claims abstract description 37
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 230000008093 supporting effect Effects 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims abstract description 3
- 238000012856 packing Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009835 boiling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
- Compressor (AREA)
Abstract
The utility model relates to the technical field of liquid hydrogen filling, in particular to a sealing structure of a single guide piston of a liquid hydrogen pump. The piston sealing structure comprises a plurality of annular grooves which are arranged on the outer surface of the piston head at intervals, two piston rings are respectively arranged in each annular groove, two piston rings are arranged in the annular groove on the outer side of each spring ring, the inner ring surface of each piston ring is in contact fit with the corresponding spring ring for installation, and the outer ring surface of each piston ring is in contact fit with the corresponding pump body for sealing and supporting; a guide ring is arranged between the piston head and the pump body. Even if one piston ring is damaged, the other piston ring can also play a sealing role, the form can adapt to the working environment of low temperature and high pressure, the service life is long, the sealing effect is better, the liquid hydrogen can be effectively prevented from leaking outwards from between the piston head and the pump body, and the compression efficiency is improved.
Description
Technical field:
The utility model relates to the technical field of liquid hydrogen filling, in particular to a sealing structure of a single guide piston of a liquid hydrogen pump.
The background technology is as follows:
At present, with the wide application of liquid hydrogen energy sources, liquid hydrogen filling is more and more important. Liquid hydrogen is a low-temperature liquid fuel, the temperature of which can be as low as-200 ℃ to-250 ℃, the boiling point of which is extremely low, and which is easy to vaporize, and the liquid hydrogen is generally filled by a liquid hydrogen pump, and the pressure can reach 50MPa during filling. The existing liquid hydrogen pump generally adopts a plunger pump, wherein a piston sealing structure is required to be arranged between a piston head and a pump body, and a packing sealing structure is required to be arranged between a piston rod and the pump body and used for sealing liquid hydrogen. However, in actual operation, the existing piston sealing structure and packing sealing structure are affected by low temperature and high pressure, and particularly, the piston sealing structure cannot adapt to the working environment of low temperature and high pressure, so that the service life is short, the sealing effect is poor, liquid hydrogen leakage is easy to occur, the compression efficiency is reduced, and the risk of inflammability and explosiveness is easy to occur after the liquid hydrogen leakage.
In summary, the sealing problem of the liquid hydrogen pump in the liquid hydrogen filling process has become a technical problem to be solved in industry.
The utility model comprises the following steps:
The utility model provides a single-guide piston sealing structure of a liquid hydrogen pump, which aims to overcome the defects of the prior art and solves the problems of short service life, poor sealing effect and easy liquid hydrogen leakage of the traditional piston sealing structure.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
The utility model provides a liquid hydrogen pump single direction piston seal structure, includes the pump body, is equipped with the compression chamber in the pump body, is equipped with inlet and the liquid outlet that is linked together with the compression chamber on the pump body, is equipped with the piston in the pump body, is equipped with piston seal structure between the piston head of piston and the pump body, piston seal structure includes a plurality of ring channels that the interval was established at the piston head surface, is equipped with a spring ring in each ring channel respectively, installs two piston rings in the ring channel of spring ring outside, and the inner circle surface of piston ring and spring ring contact cooperation are installed, and the outer lane surface of piston ring and the contact cooperation of pump body seal and support; a guide ring is arranged between the piston head and the pump body.
A cylinder sleeve is arranged between the pump body and the piston head.
The piston ring and the spring ring are made of low-temperature-resistant metal materials.
A packing sealing structure is arranged between a piston rod of the piston and the pump body, the packing sealing structure comprises a plurality of expansion rings, a sealing ring is arranged between every two adjacent expansion rings, the sealing ring comprises a vertical portion and an inclined portion, the vertical portion is clamped and fixed through the expansion rings, the inclined portion is in contact sealing with the piston rod, and the inclined direction of the inclined portion faces towards the piston head.
The expansion ring and the sealing ring are tightly fixed through a packing tightening sleeve arranged at the end part of the pump body.
And a sealing ring is arranged between the packing tightening sleeve and the end face of the pump body.
The sealing ring is made of rubber materials.
The outer edge of the vertical part is in contact fit with the inner wall of the pump body, and the connecting part of the vertical part and the inclined part is in contact fit with the right angle part of the inner ring of the expansion ring.
The utility model adopts the scheme and has the following advantages:
Through setting up a plurality of ring channels at the piston head surface, be equipped with a spring ring and two piston rings in every ring channel respectively, even a piston ring takes place to damage, another still can play sealed effect, this kind of form can adapt to low temperature high pressure's operational environment, long service life, and sealed effect is better, can effectively avoid liquid hydrogen to outwards leak between piston head and the pump body, promotes compression efficiency.
Through set up the packing seal structure that comprises a plurality of expansion ring and sealing ring interval between piston rod and the pump body, when liquid hydrogen leaked, the tilting part of sealing ring was big along with its holding power of increase of leakage pressure was big more, and sealing performance is better, can effectively avoid liquid hydrogen to outwards leak from between piston rod and the pump body, avoids taking place inflammable and explosive danger.
Description of the drawings:
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged schematic view of the portion a in fig. 1.
Fig. 3 is an enlarged schematic view of the B part in fig. 1.
In the figure, 1, a pump body, 2, a liquid inlet, 3, a liquid outlet, 4, a piston head, 5, an annular groove, 6, a spring ring, 7, a piston ring, 8, a guide ring, 9, a cylinder sleeve, 10, a piston rod, 11, an expansion ring, 12, a sealing ring, 13, a packing tightening sleeve, 14 and a sealing ring.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-3, a single-guide piston sealing structure of a liquid hydrogen pump comprises a pump body 1, a compression cavity is arranged in the pump body 1, a liquid inlet 2 and a liquid outlet 3 which are communicated with the compression cavity are arranged on the pump body 1, a piston is arranged in the pump body 1, a piston sealing structure is arranged between a piston head 4 of the piston and the pump body 1, the piston sealing structure comprises a plurality of annular grooves 5 which are arranged on the outer surface of the piston head 4 at intervals, a spring ring 6 is arranged in each annular groove 5, two piston rings 7 are arranged in the annular grooves 5 on the outer side of the spring ring 6, the inner ring surface of each piston ring 7 is in contact fit with the spring ring 6 for installation, and the outer ring surface of each piston ring 7 is in contact fit with the pump body 1 for sealing and supporting; a guide ring 8 is arranged between the piston head 4 and the pump body 1, and due to the supporting effect of the piston ring 7, the number of the guide rings 8 can be only one, and the guide effect on the piston head 4 can be ensured.
A cylinder sleeve 9 is arranged between the pump body 1 and the piston head 4 to protect the pump body 1, and the cylinder sleeve 9 is convenient to assemble, disassemble and replace.
The piston ring 7 and the spring ring 6 are made of low-temperature-resistant metal materials, have high strength and long service life, and can play a role in sealing and supporting.
Be equipped with packing seal structure between piston rod 10 and the pump body 1 of piston, packing seal structure includes a plurality of expansion ring 11, is equipped with sealing ring 12 between two adjacent expansion rings 11, sealing ring 12 includes vertical portion and tilting portion, and vertical portion is tight fixed through expansion ring 11 clamp, and tilting portion is sealed with piston rod 10 contact, and the inclination of tilting portion is towards piston head 4, and the leakage pressure of compression chamber is bigger, and the holding power of tilting portion is bigger, and sealing performance is better.
The expansion ring 11 and the sealing ring 12 are tightly fixed through a packing tightening sleeve 13 arranged at the end part of the pump body 1.
And a sealing ring 14 is arranged between the packing tightening sleeve 13 and the end face of the pump body 1 to realize the sealing of the end face.
The seal ring 12 is made of rubber material.
The outer fringe of vertical portion and the contact cooperation of pump body 1 inner wall, the junction of vertical portion and tilting portion and the right angle department contact cooperation of the inner circle of expansion ring 11 can avoid sealing ring 12 to take place radial movement.
Working principle:
When the device works, liquid hydrogen enters the compression cavity from the liquid inlet 2 for pressurization under the reciprocating motion of the piston, and then is discharged outwards from the liquid outlet 3. The number of the piston rings 7 is increased due to the piston sealing structure formed by the plurality of annular grooves 5, the spring ring 6 in each annular groove 5 and the two piston rings 7, the overall sealing performance is not affected even if the piston rings are damaged individually, the sealing effect is better, the service life is long, and the liquid hydrogen can be effectively prevented from leaking outwards from between the piston head 4 and the pump body 1. The packing sealing structure formed by a plurality of expansion rings 11 and sealing rings 12 at intervals has the advantages that when liquid hydrogen leaks, the larger the holding force of the inclined part of the sealing rings 12 is along with the increase of the leakage pressure, the better the sealing performance is, and the liquid hydrogen can be effectively prevented from leaking outwards from between the piston rod 10 and the pump body 1.
The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (8)
1. The utility model provides a liquid hydrogen pump single direction piston seal structure, includes the pump body, is equipped with the compression chamber in the pump body, is equipped with inlet and the liquid outlet that is linked together with the compression chamber on the pump body, is equipped with the piston in the pump body, is equipped with piston seal structure between the piston head of piston and the pump body, its characterized in that: the piston sealing structure comprises a plurality of annular grooves which are arranged on the outer surface of the piston head at intervals, a spring ring is respectively arranged in each annular groove, two piston rings are arranged in the annular grooves on the outer side of each spring ring, the inner ring surface of each piston ring is in contact fit with the corresponding spring ring for installation, and the outer ring surface of each piston ring is in contact fit with the pump body for sealing and supporting; a guide ring is arranged between the piston head and the pump body.
2. The liquid hydrogen pump single-guide piston sealing structure according to claim 1, wherein: a cylinder sleeve is arranged between the pump body and the piston head.
3. The liquid hydrogen pump single-guide piston sealing structure according to claim 1, wherein: the piston ring and the spring ring are made of low-temperature-resistant metal materials.
4. The liquid hydrogen pump single-guide piston sealing structure according to claim 1, wherein: a packing sealing structure is arranged between a piston rod of the piston and the pump body, the packing sealing structure comprises a plurality of expansion rings, a sealing ring is arranged between every two adjacent expansion rings, the sealing ring comprises a vertical portion and an inclined portion, the vertical portion is clamped and fixed through the expansion rings, the inclined portion is in contact sealing with the piston rod, and the inclined direction of the inclined portion faces towards the piston head.
5. The liquid hydrogen pump single guide piston sealing structure according to claim 4, wherein: the expansion ring and the sealing ring are tightly fixed through a packing tightening sleeve arranged at the end part of the pump body.
6. The liquid hydrogen pump single guide piston sealing structure according to claim 5, wherein: and a sealing ring is arranged between the packing tightening sleeve and the end face of the pump body.
7. The liquid hydrogen pump single guide piston sealing structure according to claim 4, wherein: the sealing ring is made of rubber materials.
8. The liquid hydrogen pump single guide piston sealing structure according to claim 4, wherein: the outer edge of the vertical part is in contact fit with the inner wall of the pump body, and the connecting part of the vertical part and the inclined part is in contact fit with the right angle part of the inner ring of the expansion ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322874402.1U CN220909945U (en) | 2023-10-25 | 2023-10-25 | Single-guide piston sealing structure of liquid hydrogen pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322874402.1U CN220909945U (en) | 2023-10-25 | 2023-10-25 | Single-guide piston sealing structure of liquid hydrogen pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220909945U true CN220909945U (en) | 2024-05-07 |
Family
ID=90909023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322874402.1U Active CN220909945U (en) | 2023-10-25 | 2023-10-25 | Single-guide piston sealing structure of liquid hydrogen pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220909945U (en) |
-
2023
- 2023-10-25 CN CN202322874402.1U patent/CN220909945U/en active Active
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