CN214533540U

CN214533540U - Hydrogen circulating pump with offset compensation function

Info

Publication number: CN214533540U
Application number: CN202023063020.3U
Authority: CN
Inventors: 陆元红
Original assignee: Hanqu Wuxi Automobile Technology Co ltd
Current assignee: Hanqu Wuxi Automobile Technology Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-10-29
Anticipated expiration: 2030-12-18

Abstract

The utility model discloses a hydrogen circulating pump with offset compensation function, including the motor and the pump body, the pump body includes gear cover plate, race plate, casing, driving shaft and driven shaft, be equipped with air inlet and gas outlet simultaneously on the casing, be equipped with a pair of meshed rotor in the casing, gear cover plate and race plate constitute the gear chamber together, the gear intracavity is equipped with a pair of intermeshing's gear, the rotor chamber is constituteed to casing and race plate, the rotor is located the rotor intracavity, the motor passes through the coupling joint driving shaft, be provided with atmoseal and first bearing between rotor chamber and the gear chamber, first bearing is setting up the gear chamber of laminating on the race plate. The utility model discloses can compensate the axial and the radial skew of driving shaft through the shaft coupling, prevent that atmoseal and sealing washer from becoming invalid, guarantee the sustainability of the high leakproofness ability in the hydrogen circulating pump to guarantee hydrogen safety in utilization, and improved fuel utilization.

Description

Hydrogen circulating pump with offset compensation function

Technical Field

The utility model belongs to the technical field of fuel cell, concretely relates to hydrogen circulating pump that has compensation skew function for fuel cell.

Background

The hydrogen circulating pump is a key part of a hydrogen fuel cell engine, and plays important roles of improving the fuel utilization rate, ensuring the hydrogen safety (unsafe factors caused by hydrogen overflow in the external environment) and the like. For the hydrogen circulating pump, besides ensuring the safety of hydrogen, the hydrogen purity is ensured, so the sealing design of the hydrogen circulating pump is much higher than that of the traditional gas circulating pump. The complete machine sealing reliability of the hydrogen circulating pump in the current market is not enough, the result caused by the complete machine sealing reliability is firstly hydrogen leakage, and then the lubricating oil used for lubricating the gear in the pump body leaks to pollute hydrogen, so that the purity of the hydrogen cannot meet the requirement, and the fuel utilization rate is reduced.

Patent No. 201921516515.1 discloses a gear outdoor shift formula hydrogen circulating pump assembly, and it adopts first oil blanket and second oil blanket to realize the good sealed effect of hydrogen circulating pump, but its in the middle of practical application, because the motor driving shaft is usually too long, the distal end is beated great, leads to first oil blanket and the sealed inefficacy of second oil blanket very easily to do not thoroughly solve lubricating oil leakage and hydrogen leakage problem.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the hydrogen circulating pump with the offset compensation function for the fuel cell is provided, the motor is connected with the driving shaft through the coupler, the coupler can compensate the axial offset and the radial offset of the driving shaft, the failure of a sealing structure is prevented, the continuous high sealing performance in the hydrogen circulating pump is ensured, the hydrogen leakage and the lubricating oil leakage are prevented, the use safety of the hydrogen is ensured, and the fuel utilization rate is improved.

The technical scheme is as follows: in order to achieve the above object, the utility model provides a hydrogen circulating pump with offset compensation function, including the motor and the pump body, the pump body includes gear cover plate, bearing plate, casing, driving shaft and driven shaft, be equipped with air inlet and gas outlet simultaneously on the casing, be equipped with a pair of meshed rotor in the casing, gear cover plate and bearing plate constitute the gear chamber together, the gear intracavity is equipped with a pair of intermeshing's gear, the rotor chamber is constituteed to casing and bearing plate, the rotor is located the rotor intracavity, the motor passes through the coupling joint driving shaft, be provided with atmoseal and first bearing between rotor chamber and the gear chamber, the gear chamber is being laminated on the bearing plate to first bearing setting, the atmoseal sets up and is used for preventing the high-pressure gas of rotor intracavity from joining in gear chamber between first bearing and the rotor chamber.

Furthermore, the number of the air seals and the first bearings is two, the first bearings are respectively sleeved on the driving shaft and the driven shaft, and the air seals are also respectively sleeved on the driving shaft and the driven shaft.

Furthermore, two second bearings are further arranged in the shell and are respectively sleeved on the driving shaft and the driven shaft.

Furthermore, a sealing ring is arranged between the shell and the driving shaft and is positioned at a joint close to the shell and the driving shaft.

Further, the shaft coupling includes motor shaft wheel hub, motor shaft wheel hub round pin, driving shaft wheel hub round pin and elastomer, motor shaft wheel hub round pin and driving shaft wheel hub round pin are installed on motor shaft wheel hub and driving shaft wheel hub through interference fit respectively, be provided with the pinhole that matches with motor shaft wheel hub round pin and driving shaft wheel hub round pin on the elastomer, motor shaft wheel hub round pin and driving shaft wheel hub round pin pass through pinhole clearance fit and install on the elastomer, the motor shaft of motor and the driving shaft of the pump body are connected respectively on motor shaft wheel hub and driving shaft wheel hub. The motor shaft hub pin and the driving shaft hub pin are in interference fit with a motor shaft hub and a driving shaft hub and in clearance fit with the elastic body, so that radial offset of the motor shaft and the driving shaft is compensated, axial offset of the motor shaft and the driving shaft is compensated by the axial clearance between the elastic body and the hub, and the elastic body is used for transmitting torque and absorbing shock.

Has the advantages that: compared with the prior art, through the use of first bearing and second bearing, cooperation atmoseal and sealing washer, the atmoseal high-pressure gas that can prevent the rotor intracavity from bunching into the gear chamber, first bearing can prevent lubricating oil and leak, make the hydrogen circulating pump possess fine leakproofness, in addition through passing through the coupling joint driving shaft with the motor, the shaft coupling can compensate the axial and the radial skew of driving shaft, prevent atmoseal and sealing washer inefficacy, the sustainability of the high leakproofness ability in the hydrogen circulating pump has been guaranteed, thereby hydrogen safety in utilization has been guaranteed, and fuel utilization rate has been improved.

Drawings

FIG. 1 is a schematic view of a hydrogen circulation pump;

FIG. 2 is a cross-sectional view of the pump body;

FIG. 3 is a schematic view of the structural connection state of the coupling;

fig. 4 is an exploded view of the coupling.

Detailed Description

The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.

As shown in fig. 1, the utility model provides a hydrogen circulating pump with offset compensation function for fuel cell, including the motor 100 and the pump body 101, the pump body 101 is connected on the motor 100, and the pump body 101 includes gear cover plate 3, bearing plate 2, casing 1, is equipped with air inlet 102 and gas outlet 103 on the casing 1 simultaneously.

As shown in fig. 2, a pair of meshed rotors are arranged in a housing 1, the pair of meshed rotors are a main rotor 10 and a slave rotor 11 respectively, the housing 1 and a bearing plate 2 form a rotor cavity 9, the main rotor 10 and the slave rotor 11 are both arranged in the rotor cavity 4, a gear cover plate 3 and the bearing plate 2 form a gear cavity 4 together, a pair of gears meshed with each other are arranged in the gear cavity 4, the pair of gears are a main gear 6 and a slave gear 5 respectively, the main gear 12 and a slave shaft 13 are respectively arranged on the main rotor 10 and the slave rotor 11, the main gear 6 and the slave gear 5 are respectively arranged on the main shaft 12 and the slave shaft 13, a motor 100 is connected with the main shaft 12 through a coupler, two air seals 8 and two first bearings 7 are arranged between the rotor cavity 9 and the gear cavity 4, the two first bearings 7 are respectively sleeved on the main shaft 12 and the slave shaft 13, and the first bearings 7 are arranged on the bearing plate 2 and attached to the gear cavity 4, two air seals 8 are also respectively sleeved on the driving shaft 12 and the driven shaft 13, two second bearings 14 are further arranged in the shell 1 and respectively sleeved on the driving shaft 12 and the driven shaft 13, a sealing ring 15 is arranged between the shell 1 and the driving shaft 12, and the sealing ring 15 is positioned at a joint close to the shell 1 and the driving shaft 12.

As shown in fig. 3 and 4, the coupling includes a motor shaft hub 106, three motor shaft hub pins 107, a drive shaft hub 108, three drive shaft hub pins 109 and an elastic body 105, the three motor shaft hub pins 107 and the three drive shaft hub pins 109 are respectively installed on the motor shaft hub 106 and the drive shaft hub 108 through interference fit, six pin holes 110 matched with the motor shaft hub pins 107 and the drive shaft hub pins 109 are arranged on the elastic body 105, the three motor shaft hub pins 107 and the three drive shaft hub pins 109 are installed on the elastic body 105 through clearance fit of the six pin holes 110, and a motor shaft 104 of the motor and a drive shaft 12 of the pump body are respectively connected to the motor shaft hub 106 and the drive shaft hub 109.

Above-mentioned hydrogen circulating pump is in the use, this embodiment is through injecting lubricating grease in gear chamber 14, utilize the mode that lubricating grease replaced lubricating oil, can reduce the probability of seepage by a wide margin, and under first bearing 7's effect, can accomplish to prevent lubricating grease and leak, in addition under the effect of atmoseal 8, can prevent that the high-pressure gas in the rotor chamber 9 from joining in marriage gear chamber 4 in series, under the effect of sealing washer 15, can prevent that the high-pressure gas in the rotor chamber 9 from running out of pump body 101, thereby make hydrogen purity obtain the guarantee, can satisfy the user demand, fuel utilization rate has been improved.

Above-mentioned hydrogen circulating pump is in the use, the most crucial is, the shaft coupling can compensate the axial and radial skew of driving shaft, through motor shaft hub round pin 107 and driving shaft hub round pin 109 and motor shaft hub 106 and driving shaft hub 108 interference fit and with elastomer 105's clearance fit, be used for compensating the radial skew of motor shaft 104 and driving shaft 12, elastomer 105 and hub are used for compensating the axial skew of motor shaft 104 and driving shaft 12 in axial clearance, make atmoseal 8 and sealing washer 15 keep effective position, it takes place to lose efficacy to have avoided atmoseal 8 and sealing washer 15, the sustainability of the interior high leakproofness ability of hydrogen circulating pump has been guaranteed.

Claims

1. The utility model provides a hydrogen circulating pump with offset compensation function, includes the motor and the pump body, the pump body includes gear cover plate, bearing plate, casing, driving shaft and driven shaft, be equipped with air inlet and gas outlet simultaneously on the casing, be equipped with a pair of meshed rotor in the casing, gear cover plate and bearing plate constitute the gear chamber together, the gear intracavity is equipped with a pair of intermeshing's gear, the rotor chamber is constituteed to casing and bearing plate, the rotor is located the rotor intracavity, its characterized in that: the motor passes through the coupling joint driving shaft, be provided with atmoseal and first bearing between rotor chamber and the gear chamber, first bearing sets up and is laminating the gear chamber on the bearing plate, the atmoseal sets up and is used for preventing the high-pressure gas of rotor intracavity from joining in marriage the gear chamber between first bearing and the rotor chamber.

2. A hydrogen circulation pump having offset compensation function according to claim 1, characterized in that: the number of the air seals and the first bearings is two, the first bearings are respectively sleeved on the driving shaft and the driven shaft, and the air seals are also respectively sleeved on the driving shaft and the driven shaft.

3. A hydrogen circulation pump having offset compensation function according to claim 1, characterized in that: and two second bearings are further arranged in the shell and are respectively sleeved on the driving shaft and the driven shaft.

4. A hydrogen circulation pump having offset compensation function according to claim 3, characterized in that: a sealing ring is arranged between the shell and the driving shaft and is positioned at a joint close to the shell and the driving shaft.

5. A hydrogen circulation pump having offset compensation function according to claim 1, characterized in that: the shaft coupling includes motor shaft wheel hub, motor shaft wheel hub round pin, driving shaft wheel hub round pin and elastomer, motor shaft wheel hub round pin and driving shaft wheel hub round pin are installed on motor shaft wheel hub and driving shaft wheel hub through interference fit respectively, be provided with the pinhole that matches with motor shaft wheel hub round pin and driving shaft wheel hub round pin on the elastomer, motor shaft wheel hub round pin and driving shaft wheel hub round pin are installed on the elastomer through pinhole clearance fit, the motor shaft of motor and the driving shaft of the pump body are connected respectively on motor shaft wheel hub and driving shaft wheel hub.