CN219932468U - Multi-stage pump for liquefied gas - Google Patents

Multi-stage pump for liquefied gas Download PDF

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Publication number
CN219932468U
CN219932468U CN202321659209.XU CN202321659209U CN219932468U CN 219932468 U CN219932468 U CN 219932468U CN 202321659209 U CN202321659209 U CN 202321659209U CN 219932468 U CN219932468 U CN 219932468U
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CN
China
Prior art keywords
pump
liquefied gas
pump body
bearing
cover
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CN202321659209.XU
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Chinese (zh)
Inventor
刘波
余温如
聂东
郝行亮
刘良永
姜浩
杜彦平
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Zhejiang Jiasong New Energy Co ltd
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Zhejiang Jiasong New Energy Co ltd
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Priority to CN202321659209.XU priority Critical patent/CN219932468U/en
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Abstract

The utility model discloses a liquefied gas multistage pump, which comprises a pump body, wherein a pull rod is arranged in the middle of the pump body, a middle section cover is arranged at the upper part of the pull rod, a tail section cover is arranged at the tail part of the pump body, a discharging section is arranged at the rear side of a cavity of the tail section cover, a sealing seat is arranged at the rear side of the discharging section, a sealing cover is arranged at the end part of the sealing seat, a bearing bracket is arranged at the rear side of the sealing cover, a bearing gasket is arranged at the central part of the bearing bracket, the bearing gasket is attached to a deep groove bearing, and a pump shaft is arranged at the central part of the pump body; the gap of middle section lid department is provided with the pump chamber, pump body right side upper portion is provided with the liquefied gas and inhales the end, through adopting centrifugal flow measurement channel principle, horizontal structure and the sealed axle design of machine mould for the pump body can be under high pressure differential, low consumption performance and high gas content's the high-efficient, steady pumping liquefied gas.

Description

Multi-stage pump for liquefied gas
Technical Field
The utility model relates to a liquefied gas multistage pump.
Background
In the field of liquefied gas transfer, centrifugal pumps are commonly used to effect the transfer of liquefied gas. Centrifugal pumps create centrifugal forces by rotating blades, drawing liquid from the suction end and pushing it to the discharge end. However, there are challenges and problems in delivering liquefied gas. First, liquefied gas typically has a high pressure differential, which requires a high operating pressure capacity for the pump. Second, the gas content of the liquefied gas is typically high, possibly up to 50%, which has a certain influence on the working performance and stability of the pump. In addition, the consumption performance of the liquefied gas is required to be low, and the pump is required to have high efficiency.
Cooling of the pump body also requires consideration when delivering the liquefied gas. Because of the cryogenic nature of liquefied gas, conventional cooling methods may not be suitable for use with liquefied gas multi-stage pumps, and thus other means are required to maintain the normal operating temperature of the pump body.
In the prior art, the centrifugal pump has poor stability in the use process. Since leakage is easy to occur in the process of delivering the liquefied gas, an improvement is made, and a liquefied gas multistage pump is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a liquefied gas multistage pump, which comprises a pump body and is characterized in that: the middle part of the pump body is provided with a pull rod, the upper part of the pull rod is provided with a middle section cover, the tail part of the pump body is provided with a tail section cover, the rear side of a cavity of the tail section cover is provided with a discharging section, the rear side of the discharging section is provided with a sealing seat, the end part of the sealing seat is provided with a sealing cover, the rear side of the sealing cover is provided with a bearing frame, the central part of the bearing frame is provided with a bearing gasket, the bearing gasket is attached to a deep groove ball bearing, and the central part of the pump body is provided with a pump shaft; a pump cavity is arranged at the gap of the middle section cover, a liquefied gas suction end is arranged at the upper part of the right side of the pump body, and a pre-compression turbine is arranged on the outer surface of the pump shaft; the left end of the pump body is provided with a liquefied gas outlet end.
By adopting the structure, the pump body provides structural support for the pump cavity and bears various parts and connecting pipelines. The hexagonal nut is used for fixing and connecting the pump body and other components. The nut stop washer fixes the position of the nut, preventing the nut from loosening. The pull rod is connected with and supports the pump body, the bearing frame and other parts, so that the stability of the pump body is enhanced. The middle section cover is used for sealing the pump cavity to prevent liquefied gas from leaking. The tail section cover is used for sealing the pump cavity to prevent liquefied gas from leaking. The discharging section is used for discharging the liquefied gas and conveying the compressed liquefied gas to a target site. The sealing seat provides sealing of the pump cavity to prevent leakage of liquefied gas.
As a preferable technical scheme of the utility model, the bearing washer and the deep groove ball bearing are sleeved on the outer surface of the pump shaft.
By adopting the structure, the bearing bracket provides support and fixation for the pump shaft, and ensures the normal rotation of the pump shaft. The bearing washers are used to support the pump shaft, reducing friction and wear. The deep groove ball bearing supports and fixes the pump shaft, so that the pump shaft can smoothly rotate.
As a preferable technical scheme of the utility model, a pump motor is arranged on the right side of the pump body, and a motor rotor is arranged in the pump motor.
By adopting the structure, the pump motor is used for providing power to drive the pump shaft to rotate, so that the liquefied gas is compressed and discharged. And the rotating part of the motor rotor motor drives the pump shaft to rotate through rotation. The O-shaped ring is used for sealing the pump cavity and preventing liquefied gas from leaking. The graphite sleeve is used for sealing the pump cavity to prevent liquefied gas from leaking.
As a preferable technical scheme of the utility model, the pump body is connected through a hexagonal nut, and a nut stop washer is arranged at the joint of the hexagonal nut and the pump body.
By adopting the structure, the position of the nut is fixed through the nut stop washer, so that the nut is prevented from loosening.
As a preferable technical scheme of the utility model, an O-shaped ring is arranged on the inner surface of the sealing cover, a graphite sleeve is arranged on the outer surface of the pump shaft, and the outer surface of the graphite sleeve is attached to the pre-compression turbine.
By adopting the structure, the sealing of the pump cavity is realized through the O-shaped ring, so that the leakage of liquefied gas is prevented. The graphite sleeve is used for sealing the pump cavity to prevent liquefied gas from leaking.
As a preferable technical scheme of the utility model, the liquefied gas suction end is connected with the pump cavity through a side flow channel.
By adopting the structure, the liquefied gas flows through the impeller by the side flow passage and participates in the compression process. The liquefied gas at the gas suction end enters the pump cavity from the port to participate in the gas suction process.
As a preferable technical scheme of the utility model, the liquefied gas suction end is connected with the liquefied gas outlet end through a cavity of a pre-compression turbine.
With the above structure, compression is performed to some extent by the pre-compression turbine. And the liquefied gas compressed at the liquefied gas outlet end is discharged from the port and flows to a place where needed.
As a preferable technical scheme of the utility model, the pump shaft is connected with the deep groove ball bearing by interference fit.
By adopting the structure, the connection degree of the pump shaft and the deep groove ball bearing can be improved by connecting the pump shaft and the deep groove ball bearing through interference fit.
Drawings
FIG. 1 is a block diagram of the present utility model;
FIG. 2 is a partial block diagram of the present utility model;
FIG. 3 is a view of the pump body of the present utility model;
fig. 4 is a partial structural view of the present utility model.
Detailed Description
Example 1 of the inventive liquefied gas multistage pump is shown in fig. 1 to 4: the novel high-pressure pump comprises a pump body 1, wherein a pull rod 4 is arranged in the middle of the pump body 1, a middle section cover 5 is arranged at the upper part of the pull rod 4, a tail section cover 6 is arranged at the tail part of the pump body 1, a discharging section 7 is arranged at the rear side of a cavity of the tail section cover 6, a sealing seat 8 is arranged at the rear side of the discharging section 7, a sealing cover 9 is arranged at the end part of the sealing seat 8, a bearing bracket 10 is arranged at the rear side of the sealing cover 9, a bearing gasket 11 is arranged at the central part of the bearing bracket 10, the bearing gasket 11 is attached to a deep groove ball bearing 12, and a pump shaft 13 is arranged at the central part of the pump body 1; a pump cavity 14 is arranged at the gap of the middle section cover 5, a liquefied gas suction end 16 is arranged at the upper part of the right side of the pump body 1, and a pre-compression turbine 17 is arranged on the outer surface of the pump shaft 13; the left end of the pump body 1 is provided with a liquefied gas outlet end 18.
The pump body 1 provides structural support for the pump chamber 14, carrying the various components and connecting tubing. The hexagonal nut 2 is used to fix and connect the pump body 1 and other components. The nut stop washer 3 fixes the position of the nut, preventing the nut from loosening. The pull rod 4 is connected with and supports the pump body 1, the bearing frame 10 and other parts, so that the stability of the pump body 1 is enhanced. The middle section cover 5 is used for sealing the pump cavity 14 to prevent the leakage of liquefied gas. The tail cap 6 is used to seal the pump chamber 14 from leakage of liquefied gas. The discharging section 7 is used for discharging liquefied gas and delivering the compressed liquefied gas to a target site. The seal seat 8 provides a seal of the pump chamber 14 against leakage of liquefied gas.
The bearing washer 11 and the deep groove ball bearing 12 are sleeved on the outer surface of the pump shaft 13.
The bearing frame 10 provides support and fixation for the pump shaft 13, ensuring normal rotation of the pump shaft 13. The bearing washer 11 is used to support the pump shaft 13, reducing friction and wear. The deep groove ball bearing 12 supports and fixes the pump shaft 13 so that it can smoothly rotate.
The pump motor 19 is provided on the right side of the pump body 1, and a motor rotor 20 is provided inside the pump motor 19.
The pump motor 19 provides power to drive the pump shaft 13 to rotate, so as to compress and discharge the liquefied gas. The motor rotor 20 rotates the pump shaft 13 by rotating the rotating part of the motor. The O-ring 21 is used to seal the pump chamber 14 against leakage of liquefied gas. The graphite sleeve 22 serves to seal the pump chamber 14 against leakage of liquefied gas.
The pump body 1 is connected through a hexagonal nut 2, and a nut stop washer 3 is arranged at the joint of the hexagonal nut 2 and the pump body 1.
The nut stop washer 3 fixes the position of the nut, preventing the nut from loosening.
An O-shaped ring 21 is arranged on the inner surface of the sealing cover 9, a graphite sleeve 22 is arranged on the outer surface of the pump shaft 13, and the outer surface of the graphite sleeve 22 is attached to the pre-compression turbine 17.
The O-ring 21 is used to seal the pump chamber 14 against leakage of liquefied gas. The graphite sleeve 22 serves to seal the pump chamber 14 against leakage of liquefied gas.
The liquefied gas suction end 16 is connected to the pump chamber 14 through a side flow passage 15.
The liquefied gas in the side flow passage 15 flows through the impeller through the side flow passage 15 to participate in the compression process. The liquefied gas suction end 16 allows liquefied gas to enter the pump cavity 14 from the port to participate in the suction process.
The liquefied gas suction end 16 is connected to the liquefied gas outlet end 18 through the cavity of the pre-compression turbine 17.
Some compression is performed by the pre-compression turbine 17. The liquefied gas compressed at the liquefied gas outlet end 18 is discharged from the port and flows to a place where needed.
The pump shaft 13 is connected with the deep groove ball bearing 12 by adopting interference fit.
The pump body 1 provides structural support for the pump chamber 14, carrying the various components and connecting tubing. The hexagonal nut 2 is used to fix and connect the pump body 1 and other components. The nut stop washer 3 fixes the position of the nut, preventing the nut from loosening. The pull rod 4 is connected with and supports the pump body 1, the bearing frame 10 and other parts, so that the stability of the pump body 1 is enhanced. The middle section cover 5 is used for sealing the pump cavity 14 to prevent the leakage of liquefied gas. The tail cap 6 is used to seal the pump chamber 14 from leakage of liquefied gas. The discharging section 7 is used for discharging liquefied gas and delivering the compressed liquefied gas to a target site. The seal seat 8 provides a seal of the pump chamber 14 against leakage of liquefied gas. The sealing cap 9 is used to seal the pump chamber 14 against leakage of liquefied gas. The bearing frame 10 provides support and fixation for the pump shaft 13, ensuring normal rotation of the pump shaft 13. The bearing washer 11 is used to support the pump shaft 13, reducing friction and wear. The deep groove ball bearing 12 supports and fixes the pump shaft 13 so that it can smoothly rotate. The pump shaft 13 rotates through a motor to drive an impeller in the pump cavity 14 to rotate, so that liquefied gas is sucked, compressed and discharged. The pump chamber 14 provides a flow space for liquefied gas, and generates centrifugal force by rotation of the impeller to compress and discharge the liquefied gas. The liquefied gas in the side flow passage 15 flows through the impeller through the side flow passage 15 to participate in the compression process. The liquefied gas suction end 16 allows liquefied gas to enter the pump cavity 14 from the port to participate in the suction process. The pre-compression turbine 17 is compressed to some extent by the pre-compression turbine 17 before the liquefied gas enters the pump chamber 14. The liquefied gas compressed at the liquefied gas outlet end 18 is discharged from the port and flows to a place where needed. The pump motor 19 provides power to drive the pump shaft 13 to rotate, so as to compress and discharge the liquefied gas. The motor rotor 20 rotates the pump shaft 13 by rotating the rotating part of the motor. The O-ring 21 is used to seal the pump chamber 14 against leakage of liquefied gas. The graphite sleeve 22 serves to seal the pump chamber 14 against leakage of liquefied gas.
The working principle of the utility model is as follows: 1. working principle: the liquefied gas multistage pump adopts the principle of a centrifugal side flow pump, drives an impeller in a pump cavity 14 to rotate through a pump shaft 13, generates centrifugal force to suck liquefied gas from a suction end, pressurizes the liquefied gas through multistage compression, and finally discharges the compressed liquefied gas from a gas outlet end. The sealing of the pump body 1 and the various components ensures a circulating flow of liquefied gas in the pump chamber 14.
2. The working process comprises the following steps:
a. the inspiration process comprises the following steps: the liquefied gas enters the pump chamber 14 from the liquefied gas suction end 16, and is compressed to some extent by the action of the pre-compression turbine 17 before entering the pump chamber 14. During the suction process, the liquefied gas flows through the impeller via the side flow passage 15, and the rotation of the impeller generates centrifugal force, so that the liquefied gas is sucked into the pump chamber 14 from the suction end.
b. The compression process comprises the following steps: the liquefied gas is compressed in multiple stages in the pump cavity 14, and each stage of compression is realized by driving the impeller and the pump shaft 13 in the pump cavity 14. When the liquefied gas is compressed from one stage to the next stage, the pressure is gradually increased under the centrifugal force of the impeller.
c. And (3) exhausting: the liquefied gas after multi-stage compression is discharged from the liquefied gas outlet end 18 and flows to a place where needed. During the exhaust process, the liquefied gas keeps the tightness of the pump cavity 14 through the sealing seat 8 and the sealing cover 9, so that leakage is avoided.
d. And (3) motor driving: the driving force of the liquefied gas multistage pump comes from a pump motor 19, and the pump shaft 13 is driven to rotate through the rotation of a motor rotor 20, so that the suction, compression and discharge of the liquefied gas in the pump cavity 14 are realized.
The working principle of the liquefied gas multistage pump and various components in the working process play different roles, such as the pump body 1 provides structural support for the pump cavity 14, the hexagonal nut 2 and the nut stop washer 3 are used for fixing and stabilizing the positions of the pump body 1 and other components, the pull rod 4 is used for connecting and supporting the components such as the pump body 1, the bearing bracket 10 and the like, the middle section cover 5 and the tail section cover 6 are used for sealing the pump cavity 14, the discharging section 7 is used for discharging compressed liquefied gas, the bearing bracket 10 and the deep groove ball bearing 12 provide support and rotation of the pump shaft 13, the side flow channel 15 is used for flowing of the liquefied gas, the O-shaped ring 21 and the graphite sleeve 22 are used for sealing the pump cavity 14 and the like. All these components cooperate together to effect the suction, compression and discharge of the liquefied gas.
The above embodiments are merely one kind of liquefied gas multistage pump according to the preferred embodiments of the present utility model, and common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are included in the scope of the present utility model.

Claims (8)

1. The utility model provides a liquefied gas multistage pump, includes the pump body, its characterized in that: the middle part of the pump body is provided with a pull rod, the upper part of the pull rod is provided with a middle section cover, the tail part of the pump body is provided with a tail section cover, the rear side of a cavity of the tail section cover is provided with a discharging section, the rear side of the discharging section is provided with a sealing seat, the end part of the sealing seat is provided with a sealing cover, the rear side of the sealing cover is provided with a bearing frame, the central part of the bearing frame is provided with a bearing gasket, the bearing gasket is attached to a deep groove ball bearing, and the central part of the pump body is provided with a pump shaft; a pump cavity is arranged at the gap of the middle section cover, a liquefied gas suction end is arranged at the upper part of the right side of the pump body, and a pre-compression turbine is arranged on the outer surface of the pump shaft; the left end of the pump body is provided with a liquefied gas outlet end.
2. The liquefied gas multistage pump according to claim 1, wherein: the bearing washer and the deep groove ball bearing are sleeved on the outer surface of the pump shaft.
3. The liquefied gas multistage pump according to claim 2, wherein: the right side of the pump body is provided with a pump motor, and the inside of the pump motor is provided with a motor rotor.
4. A liquefied gas multistage pump according to claim 3, wherein: the pump body is connected through the hexagonal nut, the hexagonal nut with the junction of the pump body is provided with nut lock washer.
5. The liquefied gas multistage pump according to claim 4, wherein: the inner surface of sealed lid is provided with O type circle, the surface of pump shaft is provided with the graphite cover, the surface of graphite cover is laminated with the compression turbine in advance.
6. The liquefied gas multistage pump according to claim 5, wherein: the liquefied gas suction end is connected with the pump cavity through a side flow channel.
7. The liquefied gas multistage pump according to claim 6, wherein: the liquefied gas suction end is connected with the liquefied gas outlet end through a cavity of the pre-compression turbine.
8. The liquefied gas multistage pump according to claim 7, wherein: the pump shaft is connected with the deep groove ball bearing in interference fit.
CN202321659209.XU 2023-06-27 2023-06-27 Multi-stage pump for liquefied gas Active CN219932468U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321659209.XU CN219932468U (en) 2023-06-27 2023-06-27 Multi-stage pump for liquefied gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321659209.XU CN219932468U (en) 2023-06-27 2023-06-27 Multi-stage pump for liquefied gas

Publications (1)

Publication Number Publication Date
CN219932468U true CN219932468U (en) 2023-10-31

Family

ID=88492239

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321659209.XU Active CN219932468U (en) 2023-06-27 2023-06-27 Multi-stage pump for liquefied gas

Country Status (1)

Country Link
CN (1) CN219932468U (en)

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