Hydrogen circulating pump impurity collection and storage structure

Abstract

The application belongs to the hydrogen circulating pump impurity collecting and storing structure in the hydrogen circulating pump technical field. The housing body (10) is provided with a storage chamber (5), the protruding part (11) inner ring is provided with a bearing hole (8) and a gas seal hole (9), the position between the inner wall of the bearing hole (8) and the inner wall of the gas seal hole (9) is provided with a storage chamber inlet (7), the storage chamber inlet (7) is an annular groove structure, the storage chamber inlet (7) is communicated with the storage chamber (5) through a channel (6), and the horizontal height of the storage chamber (5) is lower than that of the storage chamber inlet (7). The hydrogen circulating pump impurity collecting and storing structure can effectively collect the impurities generated due to the wear of the gas seal during the operation of the hydrogen circulating pump, improve the reliability and stability of the pump, separate the impurities from the hydrogen, maintain the purity of the hydrogen, ensure the normal operation of the system, reduce the accumulation of the pollutants in the pump, and provide a clean working environment for the parts of the pump.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrogen circulation pumps, and more particularly relates to a hydrogen circulation pump impurity collecting and storing structure. BACKGROUND

[0002] The hydrogen circulation pump is mainly used for pressurizing and reusing the hydrogen-containing mixed gas discharged by a fuel cell, wherein the pump head is a main pressurizing component. During the operation of the hydrogen circulation pump, some impurities, particulate matters, and possible oil stains and other pollutants are inevitably generated. If these impurities cannot be effectively collected and treated, they may enter the inside of the pump body, affect the normal operation of the hydrogen circulation pump, and reduce the working efficiency and service life thereof. In addition, the existence of the impurities may also cause damage to other precision components in the pump, further aggravating the failure risk of the equipment.

[0003] The following are some current situations of the impurity and pollutant collecting technology inside the hydrogen circulation pump:

[0004] Filtering technology: filter screen filtering: setting a filter screen at the inlet or internal key position of the hydrogen circulation pump is a common impurity filtering method. These filter screens are usually made of metal or special synthetic materials and have a certain pore size, which can intercept larger particulate impurities such as dust and metal debris. However, filter screen filtering has certain limitations, and the filtering effect on small particles may be limited, and the filter screen is easy to be clogged, which needs to be cleaned or replaced regularly.

[0005] Filter element filtering: filter element filtering is another important filtering technology. Filter elements are usually made of fiber materials, porous ceramics, etc., and have a more fine filtering structure, which can effectively remove small particles, oil stains and other impurities in hydrogen. Compared with filter screens, filter elements have higher filtering precision, but also face the problems of clogging and the need for regular replacement. In order to improve the service life and filtering efficiency of the filter element, some advanced filter elements adopt special surface treatment technology or multi-layer composite structure.

[0006] Electrostatic adsorption technology: by setting an electrostatic field inside the hydrogen circulation pump, the impurity particles are charged and adsorbed to the electrode or adsorption material with opposite charges. Electrostatic adsorption technology can effectively remove small particles in hydrogen, especially for some fine dust and electrostatic impurities that are difficult to remove by physical filtering methods. However, this technology requires stable power supply and precise electric field control, and the adsorption material may be saturated after a long time of use, which needs to be cleaned or replaced regularly to ensure the adsorption effect.

[0007] Magnetic adsorption technology: For the magnetic impurities that may exist in hydrogen, such as ferromagnetic particles, etc., the method of magnetic adsorption is used for collection. Magnetic materials such as magnets or magnetic filters are installed at specific positions of the hydrogen circulating pump, and the magnetic impurities are attracted by magnetic force, so as to realize the separation and collection of impurities. The magnetic adsorption technology has good effect on the removal of magnetic impurities, but it is powerless for non-magnetic impurities, and the adsorption capacity of the magnetic material will gradually weaken over time, which needs regular inspection and maintenance.

[0008] Regular maintenance and cleaning: In addition to the above impurity collection technology, regular maintenance and cleaning of the hydrogen circulating pump are also very important. This includes disassembling the hydrogen circulating pump, inspecting and cleaning the internal components, removing accumulated impurities and dirt. For example, for some parts that are prone to accumulate impurities, such as impeller surface, pump shell interior, etc., regular cleaning can maintain the good running state of the hydrogen circulating pump. At the same time, during maintenance, worn or damaged parts can be found and replaced in time to avoid the generation and leakage of impurities due to component failure. In addition, some hydrogen circulating pumps are also equipped with online monitoring system to monitor the content and accumulation of impurities in the pump in real time, so as to take maintenance measures in time.

[0009] In the prior art, there is a technology named "Hydrogen fuel cell vehicle pressure energy driven hydrogen circulating pump device", with publication (announcement) number "CN107634245A". The technology provides a pressure energy driven hydrogen circulating pump device suitable for hydrogen fuel cell vehicles, which comprises an expansion-compression integrated machine (7) including a hydrogen expander (1) and a hydrogen pump (4). High-pressure hydrogen enters the expander (1) to reduce pressure, while outputting expansion work W to the outside, which directly drives the hydrogen pump (4); the hydrogen pump (4) drives the hydrogen circulating pump to recycle and reuse the hydrogen that has not been completely reacted in the fuel cell (3); the expansion-compression integrated machine (7) uses the pressure energy stored in high-pressure hydrogen to drive the hydrogen circulating pump, which overcomes the leakage and lubricating oil pollution problems of traditional motor driven hydrogen circulating pump, and recycles the pressure energy of high-pressure hydrogen, improving the energy utilization rate of the whole vehicle.

[0010] However, this technology does not involve the technical problems and technical solutions of the present application. SUMMARY

[0011] The technical problem to be solved by the present application is: in view of the deficiencies of the prior art, a hydrogen circulating pump impurity collecting and storing structure is provided, which has a simple structure, can effectively collect impurities generated due to wear of a gas seal during operation of the hydrogen circulating pump, prevent the impurities from entering key parts in the pump, improve the reliability and stability of the pump, separate the impurities from hydrogen, maintain the purity of the hydrogen, ensure normal operation of the system, reduce the accumulation of pollutants in the pump, provide a clean working environment for parts of the pump, reduce the wear and corrosion speed of the parts, and prolong the service life of the pump.

[0012] To solve the above technical problems, the technical solution adopted by the present application is:

[0013] The present application is a hydrogen circulating pump impurity collecting and storing structure, which comprises a shell body and a protruding part, a storage chamber is arranged in the shell body, a gas seal hole and a bearing hole are arranged in the inner circle of the protruding part, a storage chamber inlet is arranged between the inner walls of the gas seal hole and the bearing hole, the storage chamber inlet has an annular groove structure and is arranged along half of the inner wall of the protruding part, the storage chamber inlet is connected to the storage chamber through a channel, the horizontal height of the storage chamber is lower than that of the storage chamber inlet, a storage chamber outlet is arranged on the outer circle of the storage chamber, a step part is arranged on the storage chamber outlet, and a sealing cover plate is arranged on the step part.

[0014] The shell body and the protruding part have a T-shaped structure.

[0015] The step part of the storage chamber outlet is provided with a sealing gasket.

[0016] The thickness of the cover plate and the sealing gasket is less than or equal to the depth of the step part.

[0017] The storage chamber is located near one side of the shell body.

[0018] The channel is inclined from the position of the storage chamber inlet to the storage chamber, and the storage chamber extends through one side of the shell body.

[0019] The bearing hole of the inner circle of the protruding part is close to the end of the protruding part, and the gas seal hole of the inner circle of the protruding part is close to one side of the shell body.

[0020] The sealing cover plate and the sealing gasket have a rectangular structure, and screws pass through the sealing cover plate and the sealing gasket to connect with the screw holes in the position of the step part.

[0021] When the hydrogen circulating pump is working, the shell body of the shell is located below the protruding part, and the shell body and the protruding part have an integrated structure.

[0022] The technical solution of the present application has the following working principles and beneficial effects:

[0023] The hydrogen circulation pump impurity collection and storage structure of this invention includes a housing. In its structural configuration, the housing comprises a main body and a protrusion, forming an integral housing. During housing processing, a sludge storage chamber is provided within the main body. This chamber is a hollow structure that allows for both impurity collection and storage. An air seal hole and a bearing hole are located on the inner ring of the protrusion. These are the main areas where impurities are generated and pass through. The sludge storage chamber inlet is located between the inner walls of the air seal hole and the bearing hole. This inlet is an annular groove structure, allowing impurities to enter, then pass through a channel, and finally into the sludge storage chamber. The sludge storage chamber inlet connects to the sludge storage chamber via a channel. The horizontal level of the sludge storage chamber is lower than that of the inlet. This ensures that impurities enter the sludge storage chamber effectively from the higher inlet through the channel. The outer ring of the sludge storage chamber has an outlet, and the outlet of the storage chamber has a stepped section, with a sealing cover installed at the stepped section. When it is necessary to clean the impurities in the sludge storage chamber, the sealing cover is opened, the impurities are cleaned, and then the sealing cover is reinstalled. The sludge storage chamber is located on the side of the shell, making reasonable use of the effective space of the shell to effectively collect impurities generated by wear of the gas seal and other components during the operation of the hydrogen circulation pump. The inlet of the sludge storage chamber is an open groove structure, located between the gas seal hole and the bearing hole in the shell. The inlet of the sludge storage chamber is connected to the sludge storage chamber through a channel. The channel is inclined downward from the gas seal hole and bearing hole of the shell towards the sludge storage chamber. Impurities enter the lower sludge storage chamber from the higher sludge storage chamber inlet through the channel, and gravity causes the impurities to settle naturally into the sludge storage chamber, ensuring smooth flow of impurities into the sludge storage chamber. The sludge storage chamber inlet is designed as an annular groove structure, which facilitates the processing of the channel and allows impurities from different parts to first enter the sludge storage chamber inlet 7, then enter the channel, and finally flow into the sludge storage chamber. The above structure is simple and easy to manufacture; the design is reasonable and does not affect the overall appearance and installation space of the hydrogen circulation pump; the sludge storage chamber is located at the lowest position in the hydrogen circulation pump, and impurities are naturally deposited into the sludge storage chamber by gravity; the shape of the sludge storage chamber is designed to be narrow inside and wide outside according to the outer shape of the shell, and the bottom of the sludge storage chamber is opened up by a channel, which connects to the sludge storage chamber inlet located between the gas seal hole and the bearing hole in the shell, which facilitates the collection of gas seal wear impurities and solid and liquid contaminants such as water vapor, avoids impurities damaging the bearing, and improves the reliability and stability of the hydrogen circulation pump. Attached Figure Description

[0024] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0025] Figure 1 This is a schematic diagram of the impurity collection and storage structure of the hydrogen circulation pump described in this invention;

[0026] Figure 2 A cross-sectional structure schematic diagram of the impurity collection and storage structure of the hydrogen circulation pump according to the present application;

[0027] Figure 3 A partial structure schematic diagram of the impurity collection and storage structure of the hydrogen circulation pump according to the present application;

[0028] Figure 4 A partial structure schematic diagram of the impurity collection and storage structure of the hydrogen circulation pump according to the present application;

[0029] In the drawings, reference numerals are respectively: 1, a sealing cover plate; 2, a sealing gasket; 3, a shell; 4, a storage chamber outlet; 5, a storage chamber; 6, a passage; 7, a storage chamber inlet; 8, a bearing hole; 9, a gas seal hole; 10, a shell body; 11, a protrusion; 12, a step portion. DETAILED DESCRIPTION

[0030] The shape, structure, mutual position and connection relationship between the parts, the function and working principle of each part of the specific embodiment of the present application will be further described in detail by the description of the embodiments with reference to the drawings:

[0031] As shown in the drawings Figure 1 - the drawings Figure 4As shown, the application is a hydrogen circulating pump impurity collection and storage structure. The shell 3 includes a shell body 10 and a protruding part 11. The shell body 10 is provided with a storage chamber 5. The inner ring of the protruding part 11 is provided with a bearing hole 8 and a gas seal hole 9. The position between the inner wall of the bearing hole 8 and the inner wall of the gas seal hole 9 is provided with a storage chamber inlet 7. The storage chamber inlet 7 is an annular groove structure. The storage chamber inlet 7 is connected to the storage chamber 5 through a channel 6. The horizontal height of the storage chamber 5 is lower than that of the storage chamber inlet 7. The outer ring of the storage chamber 5 is provided with a storage chamber outlet 4. The storage chamber outlet 4 is provided with a stepped part 12. The stepped part 12 is positioned and buckled with a sealing cover plate 1. The above structure improves the technical solution for the deficiencies in the prior art. The hydrogen circulating pump includes a shell 3. When the structure is set, the shell 3 includes a shell body 10 and a protruding part 11. The shell body 10 and the protruding part 11 form an integrated shell 3. When the shell 3 is processed, the storage chamber 5 is arranged in the shell body 10. The storage chamber 5 is a cavity structure. It can not only collect impurities but also store impurities. The inner ring of the protruding part 11 is provided with a bearing hole 8 and a gas seal hole 9. The bearing hole 8 and the gas seal hole 9 are the main parts where impurities are generated and pass through. The position between the inner wall of the bearing hole 8 and the inner wall of the gas seal hole 9 is provided with a storage chamber inlet 7. The storage chamber inlet 7 is an annular groove structure. The annular groove structure of the storage chamber inlet 7 is used for impurities to enter. The impurities enter the channel and then enter the storage chamber 5. The storage chamber inlet 7 is connected to the storage chamber 5 through a channel 6. The horizontal height of the storage chamber 5 is lower than that of the storage chamber inlet 7. In this way, the impurities enter the storage chamber 5 from the high-positioned storage chamber inlet 7 through the channel 6, ensuring that the impurities effectively enter the storage chamber 5. The outer ring of the storage chamber 5 is provided with a storage chamber outlet 4. The storage chamber outlet 4 is provided with a stepped part 12. The stepped part 12 is positioned and buckled with a sealing cover plate 1. When the impurities in the storage chamber 5 need to be cleaned, the sealing cover plate is opened. After the impurities are cleaned, the sealing cover plate is reinstalled. The storage chamber is located on the side of the shell. The effective space of the shell is reasonably utilized. The impurities generated during the operation of the hydrogen circulating pump due to the wear of the gas seal can be effectively collected. The storage chamber inlet 7 is an open groove structure. It is located between the gas seal hole and the bearing hole in the shell 3. The storage chamber inlet 7 is connected to the storage chamber through a channel 6. The channel 6 is inclined downward from the position of the bearing hole 8 and the gas seal hole 9 of the shell 3 to the direction of the storage chamber 5. The impurities enter the storage chamber 5 from the high-positioned storage chamber inlet 7 through the channel 6. The gravity causes the impurities to naturally precipitate into the storage chamber 5, ensuring that the impurities smoothly flow into the storage chamber 5. The storage chamber inlet 7 is provided with an annular groove structure. It is convenient for processing the channel 6 and for different parts of the impurities to enter the storage chamber inlet 7, then enter the channel 6, and then flow into the storage chamber 5.The structure is simple, easy to process, reasonable in design, does not affect the overall appearance and installation space of the hydrogen circulating pump, the impurity storage chamber 5 is located at the lowest position in the hydrogen circulating pump, and the impurities are naturally precipitated into the impurity storage chamber 5 by gravity; the chamber shape of the impurity storage chamber 5 is set to be narrow inside and wide outside according to the shell shape, the bottom of the impurity storage chamber 5 is opened by the channel 6, the channel 6 communicates the impurity storage chamber inlet 7 between the bearing hole 8 and the gas seal hole 9 of the shell 3, the solid-liquid pollutants such as gas seal wear impurities and water vapor are collected, the impurities are prevented from damaging the bearing, and the reliability and stability of the hydrogen circulating pump are improved. The impurity collecting and storing structure of the hydrogen circulating pump can effectively collect the impurities generated by the wear of the gas seal during the operation of the hydrogen circulating pump, prevent the impurities from entering the key parts of the pump, improve the reliability and stability of the pump, separate the impurities from the hydrogen, maintain the purity of the hydrogen, ensure the normal operation of the system, reduce the accumulation of pollutants in the pump by collecting and storing the impurities, provide a clean working environment for the parts of the pump, help to reduce the wear and corrosion speed of the parts, and prolong the service life of the circulating pump.

[0032] The shell body 10 and the protruding part 11 are in a T-shaped structure. The shell 3 is integrally processed and formed, the processing technology is simple, and the processing cost is low. The shell body 10 is provided with the impurity storage chamber 5, and the protruding part 11 is used to set the bearing hole 8 and the gas seal hole 9.

[0033] The step part 12 of the storage chamber outlet 4 is provided with a sealing gasket 2. The impurity storage chamber 5 is sealed by the sealing gasket 2 and the sealing cover plate 1, and is convenient for disassembly, inspection and cleaning.

[0034] The thickness of the sealing cover plate 1 and the sealing gasket 2 is less than or equal to the depth of the step part 12. After the sealing cover plate 1 and the sealing gasket 2 are installed, they do not exceed the size boundary of the shell side wall, that is, they do not protrude from the side of the shell 3, and do not affect the overall appearance and installation space of the hydrogen circulating pump.

[0035] The impurity storage chamber 5 is located at a position close to one side of the shell body 10. The impurity storage chamber 5 is set by the structure of the shell 3, and does not occupy additional space.

[0036] The channel 6 is inclined to communicate the impurity storage chamber 5 from the impurity storage chamber inlet 7, and the impurity storage chamber 5 extends and penetrates through one side of the shell body 10. The channel 6 is inclined, the impurity storage chamber inlet 7 is located at a high position, the impurity storage chamber 5 is located at a low position, and the impurities flow in.

[0037] The bearing hole 8 of the convex part 11 inner ring is close to the end of the convex part 11, and the gas seal hole 9 of the convex part 11 inner ring is close to the shell body 10 side. The above structure, the storage chamber entrance 7 is recessed along the convex part 11 inner ring half week, located between the bearing hole 8 and the gas seal hole 9 position, the impurities in the bearing hole 8 position and the gas seal hole 9 position enter the storage chamber entrance 7.

[0038] The sealing cover plate 1 and the sealing gasket 2 are both rectangular structures, and the screws pass through the screw holes of the sealing cover plate 1 and the sealing gasket 2 and are connected with the stepped part 12. The shell body 10 of the shell 3 is located below the convex part 11 during the operation of the hydrogen circulating pump, and the shell body 10 and the convex part 11 are integrated structures. The above structure, the sealing cover plate 1 is attached to the sealing gasket 2, and the sealing gasket edge is abutted on the stepped part 12, and then the bolt reliably connects the sealing cover plate.

[0039] The hydrogen circulating pump impurity collecting and storing structure comprises a shell 3, the shell 3 comprises a shell body 10 and a protruding part 11, the shell body 10 and the protruding part 11 form an integrated shell 3. When the shell 3 is processed, a sewage storage chamber 5 is arranged in the shell body 10, the sewage storage chamber 5 is a cavity structure, which can realize the collection and storage of impurities, bearing holes 8 and gas seal holes 9 are arranged in the inner ring of the protruding part 11, the bearing holes 8 and the gas seal holes 9 are main parts for generating and passing impurities, and a sewage storage chamber inlet 7 is arranged between the inner walls of the bearing holes 8 and the gas seal holes 9, the sewage storage chamber inlet 7 is an annular groove structure, the sewage storage chamber inlet 7 of the annular groove structure is arranged for impurities to enter, and the impurities enter a channel and then enter the sewage storage chamber 5. The sewage storage chamber inlet 7 is connected to the sewage storage chamber 5 through the channel 6, and the horizontal height of the sewage storage chamber 5 is lower than that of the sewage storage chamber inlet 7. In this way, the impurities enter the sewage storage chamber 5 at a low position from the sewage storage chamber inlet 7 at a high position through the channel 6, and the impurities are effectively ensured to enter the sewage storage chamber 5. A sewage storage chamber outlet 4 is arranged at the outer ring of the sewage storage chamber 5, the sewage storage chamber outlet 4 is provided with a stepped part 12, and the stepped part 12 is buckled with a sealing cover plate 1. When the impurities in the sewage storage chamber 5 need to be cleaned, the sealing cover plate is opened, the impurities are cleaned, and then the sealing cover plate is reinstalled. The sewage storage chamber is arranged on the side of the shell, and the effective space of the shell is reasonably utilized, so that the impurities generated due to the wear of the gas seal and the like during the operation of the hydrogen circulating pump can be effectively collected. The sewage storage chamber inlet 7 is an open groove structure and is arranged between the gas seal holes and the bearing holes in the shell 3, the sewage storage chamber inlet 7 is connected to the sewage storage chamber through the channel 6, the channel 6 is arranged to be inclined downward from the positions of the bearing holes 8 and the gas seal holes 9 of the shell 3 to the sewage storage chamber 5, the impurities enter the sewage storage chamber 5 at a low position from the sewage storage chamber inlet 7 at a high position through the channel 6, the gravity is used to make the impurities naturally precipitate into the sewage storage chamber 5, and the impurities are ensured to smoothly flow into the sewage storage chamber 5. The sewage storage chamber inlet 7 is an annular groove structure, which is convenient for the processing of the channel 6 and the impurities at different positions to enter the sewage storage chamber inlet 7 first, then enter the channel 6, and then flow into the sewage storage chamber 5. The above structure is simple in structure and easy to process, reasonable in design, does not affect the overall appearance and installation space of the hydrogen circulating pump, the sewage storage chamber 5 is arranged at the lowest position in the hydrogen circulating pump, the gravity is used to make the impurities naturally precipitate into the sewage storage chamber 5, the chamber shape of the sewage storage chamber 5 is arranged to be an internal-narrow-external-wide structure according to the shell shape, the bottom of the sewage storage chamber 5 is punched by the channel 6, the channel 6 connects the sewage storage chamber inlet 7 between the bearing holes 8 and the gas seal holes 9 of the shell 3, the channel 6 is convenient for collecting the impurities and water vapor generated due to the wear of the gas seal and the like and solid-liquid pollutants, avoids damage of the impurities to the bearing, and improves the reliability and stability of the circulating pump.

[0040] The application is described above with reference to the drawings, and it is obvious that the specific implementation of the application is not limited by the above manner, as long as various improvements are made by using the method concept and technical scheme of the application, or the concept and technical scheme of the application is directly applied to other occasions without improvement, which is within the protection scope of the application.

Claims

1. A hydrogen circulation pump impurity collection and storage structure, characterized in that: The shell (3) includes a shell body (10) and a protrusion (11). A sludge storage chamber (5) is provided inside the shell body (10). A bearing hole (8) and an air seal hole (9) are provided on the inner ring of the protrusion (11). A sludge storage chamber inlet (7) is provided between the inner wall of the bearing hole (8) and the inner wall of the air seal hole (9). The sludge storage chamber inlet (7) is an annular groove structure. The sludge storage chamber inlet (7) is connected to the sludge storage chamber (5) through a channel (6). The horizontal height of the sludge storage chamber (5) is lower than the horizontal height of the sludge storage chamber inlet (7). A sludge storage chamber outlet (4) is provided on the outer ring of the sludge storage chamber (5). A step (12) is provided on the sludge storage chamber outlet (4). A sealing cover plate (1) is fastened to the step (12). A sealing gasket (2) is provided at the stepped portion (12) of the outlet (4) of the sludge storage chamber; The thickness of the cover plate (1) and the sealing gasket (2) is less than or equal to the depth of the step portion (12); The channel (6) is inclined to connect the sludge storage chamber (5) from the entrance (7) of the sludge storage chamber, and the sludge storage chamber (5) extends and penetrates one side of the shell body (10); The bearing hole (8) of the inner ring of the protrusion (11) is close to the end of the protrusion (11), and the air seal hole (9) of the inner ring of the protrusion (11) is close to the side of the housing body (10).

2. The hydrogen circulation pump impurity collection and storage structure according to claim 1, characterized in that: The shell body (10) and the protrusion (11) are T-shaped.

3. The hydrogen circulation pump impurity collection and storage structure according to claim 1 or 2, characterized in that: The sludge storage chamber (5) is located on one side of the shell body (10).

4. The hydrogen circulation pump impurity collection and storage structure according to claim 1 or 2, characterized in that: The sealing cover (1) and sealing gasket (2) are both rectangular structures, and the screws pass through the sealing cover (1) and sealing gasket (2) and connect to the screw holes at the step (12).

5. The hydrogen circulation pump impurity collection and storage structure according to claim 1 or 2, characterized in that: When the hydrogen circulation pump is working, the housing body (10) of the housing (3) is located below the protrusion (11), and the housing body (10) and the protrusion (11) are an integral structure.

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