CN213450553U - Bidirectional gear pump applied to urea pump assembly - Google Patents
Bidirectional gear pump applied to urea pump assembly Download PDFInfo
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- CN213450553U CN213450553U CN202021902192.2U CN202021902192U CN213450553U CN 213450553 U CN213450553 U CN 213450553U CN 202021902192 U CN202021902192 U CN 202021902192U CN 213450553 U CN213450553 U CN 213450553U
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Abstract
The utility model relates to a can simplify two-way gear pump on assembly structure's being applied to urea pump assembly. The bidirectional gear pump applied to the urea pump assembly comprises a pump core shell and a motor, and is characterized in that: the pump core shell is connected with a lower bottom plate, the motor is located in a containing cavity formed between the pump core shell and the lower bottom plate, an upper cover plate is connected above the lower bottom plate, a sealing cavity is formed between the upper cover plate and the lower bottom plate in a sealing mode, a driving gear and a driven gear are rotatably arranged in the sealing cavity, the driving gear is in transmission connection with the motor and meshed with the driven gear, two through holes communicated with the sealing cavity are formed in the upper cover plate, and the two through holes are located on the left side and the right side of the meshing position of the driving gear and the driven. The bidirectional gear pump applied to the urea pump assembly drives the two meshed gears to rotate through the motor, so that the functions of forward rotation liquid suction and reverse rotation liquid discharge are realized, the assembly structure is greatly simplified, and the manufacturing cost is reduced.
Description
Technical Field
The utility model relates to a urea pump assembly, concretely relates to two-way gear pump on urea pump assembly.
Background
With the improvement of national emission requirements, more and more diesel vehicles need to be additionally provided with an SCR system, and urea is utilized to neutralize oxynitride so as to reduce the pollution of the diesel vehicles to the environment. The core component of the SCR system is a urea pump assembly, and the general urea pump assembly comprises a shell, a pressure sensor, a throttle valve, a reversing valve and a pump core. The urea pump assembly pumps urea in the urea box to the urea injection unit, and the urea injection unit sprays the urea to be neutralized with oxynitride in automobile exhaust. However, the urea solution may be frozen when the temperature is lower than-11 ℃, which may cause the urea supply system to fail to work normally, so after the urea injection unit finishes injecting urea, the urea in the system needs to be discharged back to the urea tank, and the switching operation of the urea flow direction is completed by the reversing valve. In order to realize the functions, the existing urea pump assembly is composed of a diaphragm pump and a reversing valve, the diaphragm pump is composed of a diaphragm and a motor, the diaphragm is driven by the motor to move, so that the diaphragm generates pump force, the diaphragm pump can only realize one-way liquid flow direction, and only with the help of the reversing valve can realize two-way liquid flow direction. However, the reversing valve has a complex structure, is troublesome to manufacture, and has high cost, and particularly, the reversing valve can be seen in a utility model patent named as a urea pump assembly electromagnetic reversing valve (with the patent number of CN 201921227322.4).
Disclosure of Invention
In view of the deficiencies in the prior art, the utility model discloses the innovation provides a can simplify assembly structure be applied to two-way gear pump on urea pump assembly.
The bidirectional gear pump applied to the urea pump assembly comprises a pump core shell and a motor, and is characterized in that: the improved pump core is characterized in that a lower bottom plate is connected to the pump core shell, the motor is located in a containing cavity formed between the pump core shell and the lower bottom plate, an upper cover plate is connected to the upper portion of the lower bottom plate, a sealing cavity is formed between the upper cover plate and the lower bottom plate in a sealing mode, a driving gear and a driven gear are rotatably arranged in the sealing cavity, the driving gear is in transmission connection with the motor and meshed with the driven gear, two through holes communicated with the sealing cavity are formed in the upper cover plate, and the two through holes are located on the left side and the right side of a meshing position of the driving.
The bottom of the upper cover plate is provided with an annular groove, a sealing ring is arranged in the annular groove, and the sealing ring acts on the lower bottom plate.
The driving gear and the driven gear are both made of plastics.
According to the utility model provides a pair of be applied to two-way gear pump on urea pump assembly, through the rotation of two meshing gears of motor drive to realize corotation imbibition, the assembly structure has been simplified greatly to the function of reversal flowing back, has reduced manufacturing cost.
Drawings
Fig. 1 is a top view of the present invention;
fig. 2 is a top view of the upper cover plate.
Detailed Description
As shown in fig. 1, the bidirectional gear pump applied to the urea pump assembly comprises a pump core shell 1 and a motor, wherein a lower bottom plate 2 is connected to the pump core shell 1, the motor is located in a cavity formed between the pump core shell 1 and the lower bottom plate 2, as shown in fig. 2, an upper cover plate 3 is connected above the lower bottom plate 2, a sealed cavity 6 is formed between the upper cover plate 3 and the lower bottom plate 2 in a sealed manner, a driving gear 4 and a driven gear 5 are rotatably arranged in the sealed cavity 6, wherein the driving gear 4 is in transmission connection with the motor, the driving gear 4 is meshed with the driven gear 5, in addition, two through holes 7 communicated with the sealed cavity 6 are arranged on the upper cover plate 3, and the two through holes 7 are respectively located at the left side and the right side of the meshing position of the.
When normal imbibition, the motor corotation, driving gear 4 along clockwise rotation, because driving gear 4 and driven gear 5 meshing, driven gear 5 synchronous rotation, the meshing department of two gears just produces a hydraulic pressure of right direction (the direction in figure 1) like this, and the through-hole 7 that is located two gear meshing departments left side just realizes the feed liquor, and the through-hole that is located two gear meshing departments right just realizes going out the liquid. On the contrary, if the motor rotates reversely, the through hole 7 on the left side of the meshing position of the two gears realizes liquid outlet, and the through hole on the right side of the meshing position of the two gears realizes liquid inlet. Through the structure, a bidirectional gear pump can replace a diaphragm pump to be combined with a commutator, so that the assembly structure is greatly simplified, and the manufacturing cost is reduced.
In order to seal the upper cover plate 3 and the lower base plate 2 to form a sealing cavity 6, an annular groove 9 is arranged at the bottom of the upper cover plate 3, a sealing ring is arranged in the annular groove 9, and the sealing ring acts on the lower base plate 2. The sealing ring can form good sealing between the upper cover plate 3 and the lower base plate 2.
Finally worth mentioning, the utility model discloses a driving gear 4 and driven gear 5 are made by plastics, and plastics itself has the self-lubricating effect, therefore driving gear 4 and driven gear 5 are more difficult wearing and tearing.
Claims (3)
1. Be applied to two-way gear pump on urea pump assembly, including pump core shell (1) and motor, its characterized in that: the improved pump core is characterized in that a lower bottom plate (2) is connected to the pump core shell (1), the motor is located in a containing cavity formed between the pump core shell (1) and the lower bottom plate (2), an upper cover plate (3) is connected to the upper portion of the lower bottom plate (2), a sealing cavity (6) is formed between the upper cover plate (3) and the lower bottom plate (2) in a sealing mode, a driving gear (4) and a driven gear (5) are rotatably arranged in the sealing cavity (6), the driving gear (4) is connected with the motor in a transmission mode, the driving gear (4) is meshed with the driven gear (5), two through holes (7) communicated with the sealing cavity (6) are formed in the upper cover plate (3), and the two through holes (7) are located on the left side and the right side of the meshing position of the driving gear (.
2. The bi-directional gear pump for use with a urea pump assembly of claim 1, further comprising: an annular groove (9) is formed in the bottom of the upper cover plate (3), a sealing ring is arranged in the annular groove (9), and the sealing ring acts on the lower bottom plate (2).
3. The bi-directional gear pump for use with a urea pump assembly of claim 1, further comprising: the driving gear (4) and the driven gear (5) are both made of plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021902192.2U CN213450553U (en) | 2020-09-03 | 2020-09-03 | Bidirectional gear pump applied to urea pump assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021902192.2U CN213450553U (en) | 2020-09-03 | 2020-09-03 | Bidirectional gear pump applied to urea pump assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213450553U true CN213450553U (en) | 2021-06-15 |
Family
ID=76320137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021902192.2U Active CN213450553U (en) | 2020-09-03 | 2020-09-03 | Bidirectional gear pump applied to urea pump assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213450553U (en) |
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2020
- 2020-09-03 CN CN202021902192.2U patent/CN213450553U/en active Active
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