Roots type hydrogen circulating pump adopting axial magnetic flux motor

Abstract

The utility model relates to a Roots type hydrogen circulating pump adopting an axial magnetic flux motor, which comprises a pump body, a gear cavity, a hydrogen compression cavity, a rotor cavity and a motor stator cavity are arranged in the pump body, and the rotor cavity is isolated from the motor stator cavity; a transmission rotor shaft is rotationally mounted in the gear cavity and the hydrogen compression cavity, and a transmission gear and a transmission air pressure rotor are sleeved on the rotor shaft; a driving rotor shaft is rotationally mounted in the gear cavity, the hydrogen compression cavity and the rotor cavity, and a driving gear, a driving air compression rotor and a motor rotor are arranged on the driving rotor shaft in a sleeving manner; the driving gear and the transmission gear which are meshed with each other are located in the gear cavity, the transmission air compression rotor and the driving air compression rotor which are matched with each other are located in the hydrogen compression cavity, and the motor rotor is located in the motor stator cavity; a motor stator is installed in the motor stator cavity. The axial magnetic flux motor is adopted, so that hydrogen can be completely prevented from entering the motor, and the safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circulating pumps and relates to a Roots-type hydrogen circulating pump adopting an axial magnetic flux motor. Background Art

[0002] The Roots-type hydrogen circulation pump is a rotary positive displacement compressor with the advantages of simple structure, strong pressure bearing capacity, good air flow performance, low energy consumption and convenient manufacturing.

[0003] As a key component of the fuel cell system, the Roots-type hydrogen circulation pump is used to transport the hydrogen required for the reaction of the fuel cell system. The structure of the traditional hydrogen circulation pump is generally in the form of "hydrogen compression chamber-gear chamber-radial flux motor" or "gear chamber-hydrogen compression chamber-radial flux motor". After long-term operation, it is difficult to avoid hydrogen or gear oil leakage into the motor after the oil and gas seal or oil seal ages, which seriously affects the life of the motor and poses a safety hazard. The axial flux motor can completely isolate the stator from the rotor, and use the permanent magnet attached to the side of the stator to drive the rotor to rotate. It has the advantages of large torque and high space utilization. After the axial flux motor is applied to the hydrogen circulation pump, the motor stator and hydrogen or gear oil can be completely isolated, which greatly improves safety. Summary of the invention

[0004] The utility model aims to provide a Roots-type hydrogen circulation pump adopting an axial flux motor, which can solve the problem of seriously affecting the life of the motor and posing potential safety hazards.

[0005] According to the technical solution provided by the utility model: a Roots-type hydrogen circulation pump using an axial flux motor includes a pump body, in which a gear chamber, a hydrogen compression chamber, a rotor chamber, and a motor stator chamber are arranged, and the hydrogen compression chamber, the rotor chamber, and the motor stator chamber are isolated from each other; a transmission rotor shaft is rotatably installed in the gear chamber and the hydrogen compression chamber, and a transmission gear and a transmission air compressor rotor are sleeved on the rotor shaft; an active rotor shaft is rotatably installed in the gear chamber, the hydrogen compression chamber, and the rotor chamber, and an active gear, an active air compressor rotor, and a motor rotor are sleeved on the active rotor shaft; the mutually meshing active gear and transmission gear are located in the gear chamber, the mutually cooperating transmission air compressor rotor and the active air compressor rotor are located in the hydrogen compression chamber, and the motor rotor is located in the motor stator chamber; the motor stator is installed in the motor stator chamber.

[0006] As a further improvement of the utility model, a first bearing, a second bearing, a third bearing and a fourth bearing are installed in the pump body, both ends of the active rotor shaft are located in the first bearing and the second bearing, and both ends of the transmission rotor shaft are located in the third bearing and the fourth bearing.

[0007] As a further improvement of the utility model, the first bearing, the second bearing, the third bearing and the fourth bearing are deep groove ball bearings.

[0008] As a further improvement of the utility model, a first sealing ring and a second sealing ring are provided between the gear chamber and the hydrogen compression chamber, and the first sealing ring and the second sealing ring are respectively sleeved on the driving rotor shaft and the transmission rotor shaft.

[0009] As a further improvement of the utility model, the first sealing ring is located between the first bearing and the active compressor rotor.

[0010] As a further improvement of the utility model, the second sealing ring is located between the third bearing and the transmission pneumatic rotor.

[0011] As a further improvement of the utility model, a third sealing ring is provided between the hydrogen compression chamber and the rotor chamber, and the third sealing ring is sleeved on the active rotor shaft.

[0012] As a further improvement of the utility model, the third sealing ring is located between the second bearing and the active compressor rotor.

[0013] The positive effects of this application are:

[0014] The utility model adopts an axial flux motor, which can completely isolate hydrogen from entering the interior of the motor and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural sectional view of the hydrogen circulation pump of the utility model.

[0016] Figure 2 This is a cross-sectional view of the gear chamber and hydrogen compression chamber structure of the hydrogen circulation pump of the utility model.

[0017] Figure 3 This is a front view of the hydrogen compression chamber structure of the hydrogen circulation pump of the utility model.

[0018] Figure 1-Figure 3 It includes a gear chamber 1, a hydrogen compression chamber 2, a first sealing ring 16-1, a second sealing ring 16-2, a third sealing ring 16-3, a transmission air compressor rotor 24, an active air compressor rotor 25, a motor rotor 34, a hydrogen inlet low-pressure area 201, a hydrogen outlet high-pressure area 202, etc. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed can also be "included" and "having"; for example, a process, method, system, product or device that can include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text expression.

[0023] like Figure 1 As shown, the utility model is a Roots-type hydrogen circulation pump using an axial flux motor, including a pump body, in which a gear chamber 1, a hydrogen compression chamber 2, a rotor chamber, and a motor stator chamber 3 are provided, and the hydrogen compression chamber 2, the rotor chamber, and the motor stator chamber 3 are isolated from each other.

[0024] The transmission rotor shaft 5 is rotatably installed in the gear chamber 1 and the hydrogen compression chamber 2, and the transmission gear 14 and the transmission gas compressor rotor 24 are sleeved on the rotor shaft; the active rotor shaft 4 is rotatably installed in the gear chamber 1, the hydrogen compression chamber 2, and the rotor chamber, and the active rotor shaft 4 is sleeved with the active gear 13, the active gas compressor rotor 25, and the motor rotor 34; the mutually meshing active gear 13 and the transmission gear 14 are located in the gear chamber 1, the mutually coordinated transmission gas compressor rotor 24 and the active gas compressor rotor 25 are located in the hydrogen compression chamber 2, and the motor rotor 34 is located in the motor stator chamber 3. The motor stator 33 is installed in the motor stator chamber 3.

[0025] The first bearing 15-1, the second bearing 15-2, the third bearing 15-3, and the fourth bearing 15-4 are installed in the pump body, the two ends of the active rotor shaft 4 are located in the first bearing 15-1 and the second bearing 15-2, and the two ends of the transmission rotor shaft 5 are located in the third bearing 15-3 and the fourth bearing 15-4. The first bearing 15-1, the second bearing 15-2, the third bearing 15-3, and the fourth bearing 15-4 are deep groove ball bearings.

[0026] like Figure 2 As shown, in order to isolate the gear chamber 1 from the hydrogen compression chamber 2, a first sealing ring 16-1 and a second sealing ring 16-2 are provided between the gear chamber 1 and the hydrogen compression chamber 2, and the first sealing ring 16-1 and the second sealing ring 16-2 are sleeved on the active rotor shaft 4 and the transmission rotor shaft 5, respectively. The first sealing ring 16-1 is located between the first bearing 15-1 and the active compressor rotor 25, and the second sealing ring 16-2 is located between the third bearing 15-3 and the transmission compressor rotor 24. In order to isolate the hydrogen compression chamber 2 from the rotor chamber, a third sealing ring 16-3 is provided between the hydrogen compression chamber 2 and the rotor chamber, and the third sealing ring 16-3 is sleeved on the active rotor shaft 4, and the third sealing ring 16-3 is located between the second bearing 15-2 and the active compressor rotor 25.

[0027] The pump body includes a partition wall 26 , which isolates the rotor cavity from the motor stator cavity 3 , thereby ensuring that the hydrogen cannot contact the motor stator 33 .

[0028] In this embodiment, the first sealing ring 16 - 1 and the second sealing ring 16 - 2 are oil and gas seals, and the third sealing ring 16 - 3 is an air seal.

[0029] The gap between the motor rotor 34 and the motor stator 33 is 1.5-2 mm.

[0030] The working process of the utility model is as follows:

[0031] like Figure 3 As shown, a hydrogen inlet low-pressure area 201 and a hydrogen outlet high-pressure area 202 are provided on both sides of the hydrogen compression chamber 2. During the operation of the circulating pump, the active compressor rotor 25 rotates clockwise, and the transmission compressor rotor 24 rotates counterclockwise in the opposite direction, so that the hydrogen entering the hydrogen inlet low-pressure area 201 is brought to the hydrogen outlet high-pressure area 202 by the rotating compressor rotor, thereby realizing the transportation and pressurization of hydrogen.

[0032] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A Roots-type hydrogen circulation pump using an axial flux motor, comprising a pump body, characterized in that: A gear chamber (1), a hydrogen compression chamber (2), a rotor chamber, and a motor stator chamber (3) are provided in the pump body, and the hydrogen compression chamber (2), the rotor chamber, and the motor stator chamber (3) are isolated from each other; a transmission rotor shaft (5) is rotatably mounted in the gear chamber (1) and the hydrogen compression chamber (2), and a transmission gear (14) and a transmission air compressor rotor (24) are sleeved on the rotor shaft; an active rotor shaft (4) is rotatably mounted in the gear chamber (1), the hydrogen compression chamber (2), and the rotor chamber, and an active gear (13), an active air compressor rotor (25), and a motor rotor (34) are sleeved on the active rotor shaft (4); the mutually meshing active gear (13) and the transmission gear (14) are located in the gear chamber (1), the mutually cooperating transmission air compressor rotor (24) and the active air compressor rotor (25) are located in the hydrogen compression chamber (2), and the motor rotor (34) is located in the motor stator chamber (3); and a motor stator (33) is installed in the motor stator chamber (3).

2. The Roots-type hydrogen circulation pump using an axial flux motor as claimed in claim 1, characterized in that: A first bearing (15-1), a second bearing (15-2), a third bearing (15-3), and a fourth bearing (15-4) are installed in the pump body; both ends of the driving rotor shaft (4) are located in the first bearing (15-1) and the second bearing (15-2); and both ends of the transmission rotor shaft (5) are located in the third bearing (15-3) and the fourth bearing (15-4).

3. The Roots-type hydrogen circulation pump using an axial flux motor as claimed in claim 2, characterized in that: The first bearing (15-1), the second bearing (15-2), the third bearing (15-3) and the fourth bearing (15-4) are deep groove ball bearings.

4. The Roots-type hydrogen circulation pump using an axial flux motor as claimed in claim 1, characterized in that: A first sealing ring (16-1) and a second sealing ring (16-2) are provided between the gear chamber (1) and the hydrogen compression chamber (2); the first sealing ring (16-1) and the second sealing ring (16-2) are sleeved on the driving rotor shaft (4) and the transmission rotor shaft (5), respectively.

5. The Roots-type hydrogen circulation pump using an axial flux motor as claimed in claim 4, characterized in that: The first sealing ring (16-1) is located between the first bearing (15-1) and the active compressor rotor (25).

6. The Roots-type hydrogen circulation pump using an axial flux motor as claimed in claim 4, characterized in that: The second sealing ring (16-2) is located between the third bearing (15-3) and the transmission pneumatic rotor (24).

7. The Roots-type hydrogen circulation pump using an axial flux motor as claimed in claim 1, characterized in that: A third sealing ring (16-3) is provided between the hydrogen compression chamber (2) and the rotor chamber, and the third sealing ring (16-3) is sleeved on the active rotor shaft (4).

8. The Roots-type hydrogen circulation pump using an axial flux motor as claimed in claim 7, characterized in that: The third sealing ring (16-3) is located between the second bearing (15-2) and the active compressor rotor (25).

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