WO2021008154A1

WO2021008154A1 - Ejector, and fuel cell hydrogen intake regulation and hydrogen return device applicable thereto

Info

Publication number: WO2021008154A1
Application number: PCT/CN2020/079901
Authority: WO
Inventors: 李勇; 邓佳; 梁未栋; 韦庆省; 王宏旭; 刘小青; 刘华; 赵勇富; 刘静; 毛峰峰
Original assignee: 中山大洋电机股份有限公司
Priority date: 2019-07-18
Filing date: 2020-03-18
Publication date: 2021-01-21

Abstract

Disclosed are an ejector and a fuel cell hydrogen intake regulation and hydrogen return device applicable thereto. The ejector comprises a nozzle, a mixing chamber, an ejector sleeve, an inner seal ring, and a fastening screw. The nozzle and the mixing chamber are fitted to two ends of the ejector sleeve, respectively. A wall surface at a middle portion of the ejector sleeve is provided with a gap that serves as an inlet of an ejection fluid. A first flow channel is disposed at a center of the nozzle to serve as a channel for a work-producing high-pressure fluid. The nozzle has one end provided with a high-pressure fluid inlet, and another end being a high-pressure jetting opening. The mixing chamber is provided with a mixing section flow channel and an expansion section flow channel. The work-producing high-pressure fluid jetted from the high-pressure jetting opening and the ejection fluid flowing into the gap are mixed in the mixing section flow channel, pass through the expansion section flow channel, and are then ejected. The structure enables standardized and systematic designs, thereby providing high design and machining precision for part structures, superior interchangeability, and a low cost. The invention enables assembly and replacement of the nozzle and the mixing chamber without changing the ejector sleeve, thereby meeting different performance requirements.

Description

Ejector and its applied fuel cell hydrogen intake regulating hydrogen return device

Technical field:

The invention relates to an ejector and a fuel cell hydrogen intake adjustment and hydrogen return device used by the ejector.

Background technique:

The hydrogen fuel cell can directly convert the chemical energy of hydrogen into electric energy without burning. Because of its high efficiency and power density, zero emission, silent operation, it is very suitable for fuel cell vehicles. In the hydrogen circulation system of a hydrogen fuel cell vehicle, a hydrogen circulation pump is usually used as a hydrogen circulation device, but the processing and manufacturing of the hydrogen circulation pump is difficult, high cost, low reliability, and additional power consumption. Because the ejector has the outstanding advantages of simple structure, high reliability, low cost, and no extra power consumption when installed in the system, it has the development trend of replacing the hydrogen circulation pump.

However, the structure of the existing ejector is difficult to design, process and manufacture, the outer contour shape is irregular, and the versatility and interchangeability of various functional parts are poor, resulting in high design, development, and test costs, and it is difficult to integrate with other parts of the entire hydrogen circuit. .

Summary of the invention:

The purpose of the present invention is to provide an ejector and its applied fuel cell hydrogen feed adjustment and return hydrogen device, which solves the structural design, processing and manufacturing difficulties of the ejector in the prior art, and the versatility and interchangeability of various functional parts are poor. , The design, development, and test costs are high, and it is difficult to integrate with other parts of the hydrogen circuit.

The purpose of the present invention is achieved through the following technical solutions.

An ejector, which is characterized in that it comprises a nozzle, a mixing chamber, an ejection sleeve, an inner sealing ring and a fastening screw. The ejection sleeve is a cylindrical body, and a circular cavity is formed in the middle of the ejection sleeve. , The nozzle and the mixing chamber are respectively sleeved on both ends of the ejection sleeve; the mixing chamber and the ejection sleeve are sealed with an inner seal ring, and the nozzle and the ejection sleeve are sealed with an inner seal ring. It is installed and fixed on the ejection sleeve. A gap is opened on the wall surface of the ejection sleeve as the inlet of the fluid to be drained. The first flow channel is set in the middle of the nozzle as a channel for working high pressure fluid. One end of the nozzle is provided with a high pressure fluid inlet, and the other end of the nozzle is The high-pressure jet port, the mixing chamber is equipped with the mixing section flow channel and the expansion section flow channel. The work high pressure fluid ejected from the high pressure jet port is mixed with the drained fluid flowing in the gap in the mixing section flow channel and ejected after passing through the expansion section flow channel. .

The nozzle includes a first cylindrical portion and a spraying portion connected to the first cylindrical portion. The outer surface of the first cylindrical portion fits and nests with the inner surface of the ejection sleeve. An inner sealing ring is arranged between the inner surfaces of the shooting sleeve for sealing.

One end of the first cylindrical part is provided with a first flange flanging, a number of first mounting holes are provided on the first flange flanging, a number of first screw holes are provided on the front end of the ejection sleeve, and the first mounting holes Corresponding to the position of the first screw hole, the fastening screw passes through the first mounting hole and is screwed into the first screw hole to install the nozzle on the ejection sleeve.

The ejection part is a cone, and the notch of the ejection sleeve is located on one side of the middle of the ejection part.

At least one first annular groove is provided on the outer surface of the first cylindrical part, and an inner sealing ring is installed in the first annular groove.

The mixing chamber includes a second cylindrical portion. The two ends of the second cylindrical body are respectively provided with a mixing section inlet and an expansion section outlet. An inner surface is provided between the outer surface of the second cylindrical portion and the inner surface of the ejector sleeve. The sealing ring seals.

One end of the second cylindrical portion is provided with a second flange flanging, a plurality of second mounting holes are provided on the second flange flanging, and a plurality of second screw holes are provided on the rear end of the ejection sleeve The position of the second mounting hole corresponds to the second screw hole, and the mixing chamber is installed on the ejection sleeve by screwing the fastening screw through the second mounting hole and into the second screw hole.

At least one second annular groove is provided on the outer surface of the second cylindrical portion, and an inner sealing ring is installed in the second annular groove.

The diameter D1 of the first flange flange and the diameter D2 of the second flange flange are both smaller than or equal to the diameter D3 of the ejection sleeve, and a cylindrical body is formed between the nozzle, the mixing chamber and the ejection sleeve.

A plurality of third annular grooves and fourth annular grooves are respectively provided on both ends of the outer surface of the ejection sleeve, and the gap of the ejection sleeve is located between the third annular groove and the fourth annular groove. An outer sealing ring is installed in the third annular groove and the fourth annular groove.

A fuel cell hydrogen inlet regulator and hydrogen return device, comprising a block, a hydrogen inlet connector, a hydrogen return port connector, a hydrogen outlet connector, an ejector and a proportional regulating valve, the ejector is installed in the block, and The feature is that the ejector is any one of the above-mentioned ejectors.

Compared with the prior art, the present invention has the following effects:

1) The ejector of the present invention includes a nozzle, a mixing chamber, an ejection sleeve, an inner sealing ring and a fastening screw. The ejection sleeve is a cylindrical body, and a circular cavity is formed in the middle of the ejection sleeve. The nozzle and the mixing The chambers are respectively sleeved on the two ends of the ejection sleeve; the mixing chamber and ejection sleeve are sealed with an inner seal ring, and the nozzle and ejection sleeve are sealed with an inner seal ring. The nozzle and the mixing chamber are installed and fixed on the ejection sleeve by tightening screws. On the injection sleeve, a gap is opened on the wall surface of the middle of the injection sleeve as the inlet of the fluid to be drained. The first flow channel is set in the middle of the nozzle as a channel for working high-pressure fluid. One end of the nozzle is provided with a high-pressure fluid inlet, and the other end of the nozzle is a high-pressure injection port. The mixing chamber is provided with a mixing section flow channel and an expansion section flow channel. The work high pressure fluid ejected from the high-pressure jet port is mixed with the drained fluid flowing in the gap in the mixing section flow channel, and is ejected out after passing through the expansion section flow channel. Standardized and serialized design, high precision of parts structure design, good interchangeability, and low manufacturing cost. With the ejection sleeve unchanged, the nozzle and mixing chamber can be combined and replaced to meet different performance requirements. The entire ejection The outer wheel of the device is cylindrical, which is easy to integrate with other parts of the entire hydrogen circuit.

2) Other advantages are described in detail in specific embodiments.

Description of the drawings:

Figure 1 is a perspective view of the first embodiment of the present invention;

Figure 2 is an exploded perspective view of the first embodiment of the present invention;

Figure 3 is a schematic diagram of the nozzle structure in the first embodiment of the present invention;

4 is a schematic diagram of the structure of the middle mixing chamber in the first embodiment of the invention;

5 is a schematic diagram of the structure of the middle ejector sleeve of the first embodiment of the invention;

Figure 6 is a side view of the first embodiment of the invention;

Figure 7 is a cross-sectional view of A-A in Figure 6;

Fig. 8 is a schematic structural diagram of the second embodiment of the invention.

Detailed ways:

Hereinafter, the present invention will be further described in detail through specific embodiments in conjunction with the accompanying drawings.

Example one:

As shown in Figures 1 to 7, this embodiment provides an ejector, which is characterized in that it includes a nozzle 1, a mixing chamber 2, an ejection sleeve 3, an inner sealing ring 4, and a fastening screw 5. The ejection sleeve 3 described is a cylindrical body, a circular cavity 31 is formed in the middle of the ejection sleeve 3, and the nozzle 1 and the mixing chamber 2 are respectively sleeved at both ends of the ejection sleeve 3; the mixing chamber 2 and the ejection sleeve 3 The inner sealing ring 4 is used to seal the nozzle 1 and the ejection sleeve 3 is sealed with the inner sealing ring 4, the nozzle 1 and the mixing chamber 2 are installed and fixed on the ejection sleeve 3 by the fastening screw 5, in the middle of the ejection sleeve 3. A gap 32 is opened on the wall surface of the nozzle as the inlet of the fluid to be drained. The nozzle 1 is provided with a first flow passage 11 as a channel for working high-pressure fluid. One end of the nozzle 1 is provided with a high-pressure fluid inlet 12, and the other end of the nozzle 1 is a high-pressure jet port 13, a mixing chamber 2 Set the mixing section flow channel 21 and the expansion section flow channel 22. The work high pressure fluid ejected from the high-pressure injection port is mixed with the drained fluid flowing in from the gap in the mixing section flow channel 21, and is ejected after passing through the expansion section flow channel 22. The structure can adopt standardized and serialized design, and the parts structure design has high processing accuracy, good interchangeability, and low manufacturing cost. With the ejection sleeve unchanged, the nozzle and mixing chamber can be combined and replaced to meet different performance requirements. The outer wheel of the entire ejector is cylindrical, which is easy to integrate with other parts of the entire hydrogen circuit, and has a small volume.

The nozzle 1 includes a first cylindrical portion 14 and a spraying portion 15 connected to the first cylindrical portion 14. The outer surface of the first cylindrical portion 14 fits and nests with the inner surface of the ejection sleeve 3. An inner sealing ring 4 is arranged between the outer surface of the part 14 and the inner surface of the ejector sleeve 3 for sealing, with good sealing effect and high assembly accuracy.

One end of the first cylindrical portion 14 is provided with a first flange flanging 16, a number of first mounting holes 17 are provided on the first flange flanging 16, and a number of first screws are provided on the front end surface 30 of the ejector sleeve 3. Hole 33. The first mounting hole 17 corresponds to the first screw hole 33. The fastening screw 5 passes through the first mounting hole 17 and is screwed into the first screw hole 33 to install the nozzle 1 on the ejector sleeve 3. The mounting structure is simple. The assembly precision is high.

The ejection portion 15 is a cone, and the notch 32 of the ejection sleeve 3 is located on one side of the middle of the ejection portion 15, and the structure is reasonable.

At least one first annular groove 141 is provided on the outer surface of the first cylindrical portion 14, and the inner sealing ring 4 is installed in the first annular groove 141, which has a good sealing effect.

The mixing chamber 2 includes a second cylindrical portion 23. The two ends of the second cylindrical body 23 are respectively provided with a mixing section inlet 232 and an expansion section outlet 233. The outer surface of the second cylindrical portion 23 is connected to the ejector sleeve 3. The inner sealing ring 4 is arranged between the inner surfaces of the dies for sealing, and the sealing effect is good.

One end of the second cylindrical portion 23 is provided with a second flange flange 24, a plurality of second mounting holes 25 are provided on the second flange flange 24, and a rear end surface 300 of the ejection sleeve 3 is provided There are multiple second screw holes 34. The second mounting hole 25 corresponds to the second screw hole 34, and the mixing chamber 2 is installed in the lead by the fastening screw 5 passing through the second mounting hole 25 and screwing into the second screw hole 34 On the shooting sleeve 3, the installation structure is simple and the assembly accuracy is high.

At least one second annular groove 231 is provided on the outer surface of the second cylindrical portion 23, and the inner sealing ring 4 is installed in the second annular groove 231, which has good sealing effect and high assembly accuracy.

The diameter D1 of the first flange flanging 16 and the diameter D2 of the second flange flanging 24 are both smaller than or equal to the diameter D3 of the ejection sleeve 3, between the nozzle 1, the mixing chamber 2 and the ejection sleeve 3. A cylindrical body is formed, the structure is simple, the overall installation takes up a small space, and it is easy to integrate with other parts of the entire hydrogen circuit.

A plurality of third annular grooves 35 and fourth annular grooves 36 are respectively provided on both ends of the outer surface of the ejection sleeve 3, and the notches of the ejection sleeve 3 are located in the third annular groove 35 and the fourth annular groove. Between 36, the third annular groove 35 and the fourth annular groove 36 are both installed with an outer sealing ring 6, which has a good sealing effect.

Embodiment two:

As shown in Figure 8, a fuel cell hydrogen inlet regulator and hydrogen return device includes a block 100, a hydrogen inlet connector, a hydrogen return connector, a hydrogen outlet connector, an ejector 200, and a proportional regulating valve. The ejector 200 is installed in the cluster 100, and is characterized in that: the ejector 200 is any one of the ejectors 200 described in the first embodiment above, and a circular cross-section pipe 101 is arranged in the cluster 100. The ejector The 200 is nested and installed in the circular cross-section pipe 101, and the outer seal rings 6 at both ends of the outer surface of the ejection sleeve 3 are extruded with the wall surface of the circular cross-section pipe 101 to form a seal.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent. The replacement methods of are all included in the protection scope of the present invention.

Claims

An ejector, characterized in that it comprises a nozzle (1), a mixing chamber (2), an ejection sleeve (3), an inner sealing ring (4) and a fastening screw (5). The ejection sleeve (3) is a cylindrical body, a circular cavity (31) is formed in the middle of the ejection sleeve (3), the nozzle (1) and the mixing chamber (2) are respectively sleeved on both ends of the ejection sleeve (3); the mixing chamber (2) Use inner sealing ring (4) to seal with ejector sleeve (3), use inner sealing ring (4) to seal between nozzle (1) and ejector sleeve (3), tighten screw (5) The nozzle (1) and the mixing chamber (2) are installed and fixed on the ejection sleeve (3). A gap (32) is opened on the wall surface of the middle of the ejection sleeve (3) as the inlet of the fluid to be drained. The middle of the nozzle (1) Set the first flow channel (11) as a channel for working high-pressure fluid, one end of the nozzle (1) is provided with a high-pressure fluid inlet (12), the other end of the nozzle (1) is a high-pressure jet port (13), and the mixing chamber (2) is provided with a mixing section flow Channel (21) and the expansion section flow channel (22), the high-pressure fluid ejected from the high-pressure jet (13) and the drained fluid flowing in the gap are mixed in the mixing section flow channel (21), and pass through the expansion section flow channel (22) ) And then ejected.
The ejector according to claim 1, wherein the nozzle (1) comprises a first cylindrical portion (14) and a spraying portion (15) connected to the first cylindrical portion (14), and The outer surface of a cylindrical portion (14) is nested with the inner surface of the ejector sleeve (3), and an inner surface is arranged between the outer surface of the first cylindrical portion (14) and the inner surface of the ejector sleeve (3). The sealing ring (4) seals.
The ejector according to claim 2, characterized in that: one end of the first cylindrical portion (14) is provided with a first flange flange (16), and a first flange flange (16) is provided on the first flange flange (16). A number of first mounting holes (17), a number of first screw holes (33) are arranged on the front end surface (30) of the ejection sleeve (3), the first mounting holes (17) and the first screw holes (33) are located Correspondingly, the fastening screw (5) passes through the first mounting hole (17) and is screwed into the first screw hole (33) to install the nozzle (1) on the ejection sleeve (3).
The ejector according to claim 3, characterized in that: the ejection part (15) is a cone, and the notch (32) of the ejection sleeve (3) is located at a middle part of the ejection part (15). side.
The ejector according to claim 2 or 3 or 4, characterized in that: the outer surface of the first cylindrical portion (14) is provided with at least one first annular groove (141), and the first annular groove An inner sealing ring (4) is installed in the groove (141).
An ejector according to claim 1 or 2 or 3 or 4, characterized in that: the mixing chamber (2) comprises a second cylindrical portion (23), two of the second cylindrical body (23) The ends are respectively provided with a mixing section inlet (232) and an expansion section outlet (233), and an inner sealing ring (4) is provided between the outer surface of the second cylindrical portion (23) and the inner surface of the ejector sleeve (3). seal.
The ejector according to claim 6, characterized in that: one end of the second cylindrical portion (23) is provided with a second flange flanging (24), and the second flange flanging ( 24) is provided with a number of second mounting holes (25), the rear end surface (300) of the ejection sleeve (3) is provided with multiple second screw holes (34), the second mounting holes (25) and the first The two screw holes (34) are in corresponding positions, and the mixing chamber (2) is installed on the ejection sleeve (3) by screwing the fastening screw (5) through the second mounting hole (25) into the second screw hole (34).
The ejector according to claim 7, characterized in that: at least one second annular groove (231) is provided on the outer surface of the second cylindrical portion (23), and the second annular groove An inner sealing ring (4) is installed in (231).
The ejector according to claim 8, wherein the diameter D1 of the first flange flanging (16) and the diameter D2 of the second flange flanging (24) are both less than or equal to the ejector The diameter D3 of the sleeve (3) forms a cylinder between the nozzle (1), the mixing chamber (2) and the ejection sleeve (3).
The ejector according to claim 6, characterized in that: both ends of the outer surface of the ejector sleeve (3) are respectively provided with a plurality of third annular grooves (35) and fourth annular grooves (36). ), the gap of the ejection sleeve (3) is located between the third annular groove (35) and the fourth annular groove (36), and the third annular groove (35) and the fourth annular groove ( 36) The outer sealing ring (6) is installed inside.
A fuel cell hydrogen inlet regulating hydrogen return device, comprising a block (100), a hydrogen inlet connector, a hydrogen return connector, a hydrogen outlet connector, an ejector (200) and a proportional regulating valve. The ejector ( 200) is installed in an assembly block (100), characterized in that the ejector (200) is any one of the ejector (200) according to claim 1 to claim 10.