CN218414670U

CN218414670U - A galvanic pile structure that is used for leak protection oil pollution of hydrogen fuel cell air compressor machine

Info

Publication number: CN218414670U
Application number: CN202221858612.0U
Authority: CN
Inventors: 杨斌
Original assignee: Sinobrook New Energy Technologies Shanghai Co Ltd
Current assignee: Sinobrook New Energy Technologies Shanghai Co Ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2023-01-31
Anticipated expiration: 2032-07-19

Abstract

The utility model discloses a galvanic pile structure for preventing oil pollution leakage of a hydrogen fuel cell air compressor, wherein one end of a gear chamber is provided with a gear oil tank cover, and the gear oil tank cover is provided with a first vent valve; an oil seal sealing ring and an air seal sealing ring are arranged between the gear chamber and the compression cavity, a side opening is arranged between the oil seal sealing ring and the air seal sealing ring, a second breather valve is arranged at the end part of the side opening, valve plates are arranged on the first breather valve and the second breather valve, and an oleophobic coating is arranged on the valve plates. When the oil seal is used, the air pressure is adjusted and dredged before the gear chamber and the compression cavity, so that the working environment of the oil seal is improved, the abrasion of the oil seal caused by uneven air pressure is prevented, and the sealing performance of the oil seal is improved; meanwhile, the structure of the vent valve can effectively prevent lubricating oil in the gear chamber from leaking into the compression cavity, so that the outputted hydrogen is clear and oilless, and the poisoning phenomenon of a fuel cell stack is avoided; the utility model discloses simple structure, effect are outstanding, and the installation maintenance cost is low, facilitate promotion and utilization.

Description

A galvanic pile structure that is used for leak protection oil pollution of hydrogen fuel cell air compressor machine

Technical Field

The utility model relates to a fuel cell's technical field, in particular to a galvanic pile structure that is used for leak protection oil pollution of hydrogen fuel cell air compressor machine.

Background

At present, a fuel cell generates electric energy through an electrochemical reaction between combustible substances (hydrogen) and oxygen in air, wherein after the fuel cell reaction, discharged gas contains a large amount of hydrogen, and if the hydrogen is directly discharged into the atmosphere, on one hand, the hydrogen is a waste of energy, on the other hand, the hydrogen pollutes the environment, and on the other hand, the hydrogen is flammable and explosive and generates danger. Therefore, it is necessary to recover and reuse such hydrogen. At present, the hydrogen is generally recycled to the fuel cell by a compressor. And current compressor, what generally adopt between gear room and the compression chamber is the bearing, the oil blanket, the seal structure of atmoseal, the oil blanket needs lubricating oil lubrication in the use, wearing and tearing very easily between oil blanket and the high-speed rotatory pivot leads to the clearance increase, the leakproofness of wearing and tearing back oil blanket is relatively poor, and because the oil blanket is installed in inside also difficult change, in the recycling process with hydrogen pressure boost, there is the risk that lubricating oil revealed in the lubricating oil in the gear room, after the compression chamber was revealed to lubricating oil, can sneak into in hydrogen under high-pressure gas's drive, increase the oil content of output hydrogen, lead to the fuel cell galvanic pile poisoning to take place danger. In summary, in the field of hydrogen circulation pumps, the above problems have become an urgent technical problem to be solved in the industry.

Disclosure of Invention

The utility model aims at the above problem, a galvanic pile structure that is used for the leak protection oil of hydrogen fuel cell air compressor machine to pollute is provided, through the improvement of structure, adjusts to atmospheric pressure and dredges, prevents that the oil blanket structure from improving the leakproofness because of the uneven wearing and tearing that produces of atmospheric pressure, avoids lubricating oil to reveal.

The purpose of the utility model can be realized by the following technical scheme: a galvanic pile structure for preventing oil pollution of a hydrogen fuel cell air compressor comprises a gear chamber and a compression cavity, and is characterized in that one end of the gear chamber is provided with a gear oil tank cover, and the gear oil tank cover is provided with a first ventilation valve; an oil seal sealing ring and an air seal sealing ring are arranged between the gear chamber and the compression cavity, a side opening is arranged between the oil seal sealing ring and the air seal sealing ring, a second breather valve is arranged at the end part of the side opening, valve plates are arranged on the first breather valve and the second breather valve, and an oleophobic coating is arranged on the valve plates.

Preferably, the first ventilation valve and the second ventilation valve comprise metal shells, valve plates are arranged in the metal shells, pressure-sensitive springs are arranged above the valve plates, O-shaped sealing rings are arranged below the valve plates, elastic membranes are arranged on the valve plates, and oleophobic coatings are coated on the elastic membranes.

Furthermore, the elastic membrane is a membrane body made of thermoplastic elastomer, the thickness of the elastic membrane is 0.1-1mm, the oleophobic coating is a polytetrafluoroethylene coating, and the thickness of the coating is 0.2 mu m.

Compared with the prior art, the technical scheme of the utility model except whole technical scheme's improvement, still include the improvement in the aspect of many details, particularly, have following beneficial effect:

1. in the improved scheme of the utility model, one end of the gear chamber is provided with a gear oil tank cover, and the gear oil tank cover is provided with a first ventilation valve; an oil seal sealing ring and an air seal sealing ring are arranged between the gear chamber and the compression cavity, a side opening is arranged between the oil seal sealing ring and the air seal sealing ring, and a second ventilation valve is arranged at the end part of the side opening;

2. in the technical scheme of the utility model, the first and second breather valves are both provided with valve plates, the valve plates are provided with elastic membranes, the elastic membranes are coated with oleophobic coatings, here, the structure of the breather valve can effectively prevent lubricating oil in the gear chamber from leaking into the compression cavity, and the output hydrogen gas is clear and oilless, thereby avoiding the occurrence of poisoning phenomenon of fuel cell stack;

3. the utility model discloses simple structure, effect are outstanding, and the installation maintenance cost is low, facilitate promotion and utilization.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the working structure of the present invention.

Fig. 3 is a sectional view of the breather valve of the present invention.

Fig. 4 is an enlarged schematic view of a portion a of fig. 1.

The labels in the figure are as follows:

1, a gear chamber, 2 compression chambers, 3 gear oil tank covers, 4 first vent valves, 5 oil seal sealing rings, 6 air seal sealing rings, 7 side openings and 8 second vent valves;

11 metal shell, 12 valve plate, 13 pressure sensitive spring, 14O-shaped sealing ring, 15 elastic membrane and 16 oleophobic coating.

Detailed Description

The following detailed description of the embodiments of the invention, taken in conjunction with the accompanying drawings, will make it clear to those skilled in the art how the invention may be practiced. While the invention has been described in connection with its preferred embodiments, these embodiments are intended to be illustrative, and not to limit the scope of the invention.

As shown in fig. 1, a galvanic pile structure for preventing oil contamination of a hydrogen fuel cell air compressor, which includes a gear chamber 1 and a compression chamber 2, is different from the prior art in that one end of the gear chamber 1 is provided with a gear oil tank cover 3, and the gear oil tank cover is provided with a first ventilation valve 4; be equipped with oil blanket sealing washer 5 and gas seal sealing washer 6 between gear room 1 and the compression chamber 2, be equipped with side opening 7 between oil blanket sealing washer and the gas seal sealing washer, the tip of side opening is equipped with second breather valve 8, and first, second breather valve all is equipped with valve block 12, is equipped with oleophobic coating 16 on the valve block.

Particularly, the setting of first breather valve forms grease proofing fog design around the valve body for oil pocket internal gas pressure is linked together with the outside air, carries out the pressure release to the oil pocket, and simultaneously, the back of oil blanket sealing washer and the air-tight sealing washer back correspond mutually and install, and the side opening department between oil blanket sealing washer and the air-tight sealing washer sets up the second breather valve, has solved the risk factor that oil gas seal lip back atress expanded because of inside gas expend with heat and contract with cold leads to.

Furthermore, due to the fact that the oil-repellent coating is arranged on the valve plates of the first vent valve and the second vent valve, oil mist does not stop at the valve plates, and the problem that the valve plates fail due to oil mist blockage is solved.

Example 1

The utility model discloses a pile structure for hydrogen fuel cell air compressor, which is provided with a gear oil tank cover at one end of a gear chamber, and the gear oil tank cover is provided with a first ventilation valve; an oil seal sealing ring and an air seal sealing ring are arranged between the gear chamber and the compression cavity, a side opening is arranged between the oil seal sealing ring and the air seal sealing ring, a second breather valve is arranged at the end part of the side opening, valve plates are arranged on the first breather valve and the second breather valve, and an oleophobic coating is arranged on the valve plates.

Preferably, the first ventilation valve and the second ventilation valve comprise a metal shell 11, a valve plate 12 is arranged in the metal shell, a pressure-sensitive spring 13 is arranged above the valve plate, an O-shaped sealing ring 14 is arranged below the valve plate, an elastic membrane 15 is arranged on the valve plate, and an oleophobic coating 16 is coated on the elastic membrane. Specifically, the elastic membrane is a membrane body made of thermoplastic elastomer, the thickness of the elastic membrane is 0.1-1mm, the oleophobic coating is a polytetrafluoroethylene coating, and the thickness of the coating is 0.2 mu m. The diameter range of the side opening is 2-4cm, and a group of air holes are arranged at the position, close to the valve plate, of the metal shell.

Simultaneously, the back of oil blanket sealing washer and the back of air-tight sealing washer correspond each other and install, and specifically, the atmoseal of gas side is used for sealing gas specially, and the atmoseal of oil side is used for sealing oil specially, and the seal lip of sealing washer can be held the axle tightly towards one side of pressure, and when gas or liquid pressure were big more, then held more tightly. A clearance is reserved between the back of the oil seal sealing ring and the back of the oil seal sealing ring during installation, and the clearance value is 0.2-0.5mm.

The utility model discloses carrying out atmospheric pressure before gear room and compression chamber and adjusting to dredge, having improved the operational environment of oil blanket, preventing the oil blanket because of the uneven wearing and tearing that produce of atmospheric pressure, having improved its leakproofness, effectively avoided the lubricating oil in the gear room to reveal in the compression chamber, guarantee that the hydrogen knot after the output is clear does not have oil, has avoided the fuel cell galvanic pile poisoning phenomenon to take place, has solved the problem that exists among the prior art.

Example 2

In the embodiment, the first vent valve is arranged on the gear oil tank cover, and oil mist prevention design needs to be carried out on the surrounding structure of the valve body, so that the air pressure in the oil cavity is communicated with the outside, and the oil cavity is decompressed. The oil chamber side is not accompanied by the rise of the oil chamber side pressure due to the high temperature of the gear disturbance. The oil seal can work with constant holding force continuously and stably, and the problem that the oil seal needs to tightly hold the shaft to generate excessive abrasion due to pressure change factors is solved.

Then, a hole is formed in the middle side of the oil-gas oil seal, the hole is the same as the outside atmosphere, and a second vent valve is added at the position communicated with the outside, so that the risk factor that the back of the oil-gas seal lip is stressed to be opened due to expansion caused by heat and contraction caused by cold of the gas in the oil-gas seal lip is solved. Meanwhile, the first vent valve and the second vent valve are valve plates which are specially designed, and the oleophobic coating is added on the basis of the common waterproof vent valve, so that oil mist does not stop on a diaphragm layer of the valve plates, and the problem of failure of the valve plates due to oil mist blockage is avoided.

It should be noted that many variations and modifications of the embodiments of the present invention are possible, and are not limited to the specific examples of the above embodiments. The above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. In conclusion, the scope of the present invention shall include those alternatives or substitutions and modifications which are obvious to those of ordinary skill in the art, and shall be subject to the appended claims.

Claims

1. A galvanic pile structure for preventing oil pollution of a hydrogen fuel cell air compressor comprises a gear chamber and a compression cavity, and is characterized in that one end of the gear chamber is provided with a gear oil tank cover, and the gear oil tank cover is provided with a first ventilation valve; an oil seal sealing ring and an air seal sealing ring are arranged between the gear chamber and the compression cavity, a side opening is arranged between the oil seal sealing ring and the air seal sealing ring, a second breather valve is arranged at the end part of the side opening, valve plates are arranged on the first breather valve and the second breather valve, and an oleophobic coating is arranged on the valve plates.

2. The electric pile structure for preventing oil leakage pollution of a hydrogen fuel cell air compressor as claimed in claim 1, wherein the first and second vent valves comprise a metal casing, a valve plate is arranged in the metal casing, a pressure-sensitive spring is arranged above the valve plate, an O-shaped sealing ring is arranged below the valve plate, an elastic membrane is arranged on the valve plate, and an oleophobic coating is coated on the elastic membrane.

3. The fuel contamination prevention stack structure for the hydrogen fuel cell air compressor as claimed in claim 1, wherein the elastic membrane is a membrane body made of thermoplastic elastomer and has a thickness of 0.1-1mm, the oleophobic coating is a polytetrafluoroethylene coating, and the thickness of the coating is 0.2 μm.

4. The stack structure for preventing oil contamination of a hydrogen fuel cell air compressor of claim 1, wherein the back surface of the oil seal ring and the back surface of the air seal ring are installed to correspond to each other.

5. The fuel leakage pollution prevention stack structure for the hydrogen fuel cell air compressor as claimed in claim 1, wherein the diameter of the side opening ranges from 2 cm to 4cm, and the metal shell is provided with a set of air holes near the valve plate.