CN2490333Y - Liquified petroleum gas pump - Google Patents
Liquified petroleum gas pump Download PDFInfo
- Publication number
- CN2490333Y CN2490333Y CN 01241476 CN01241476U CN2490333Y CN 2490333 Y CN2490333 Y CN 2490333Y CN 01241476 CN01241476 CN 01241476 CN 01241476 U CN01241476 U CN 01241476U CN 2490333 Y CN2490333 Y CN 2490333Y
- Authority
- CN
- China
- Prior art keywords
- motor
- petroleum gas
- rotor
- pump
- liquefied petroleum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a liquefied petroleum gas pump comprising a motor, a pump body, a transmission shaft and an impeller, which is characterized in that the motor is incorporated with the pump as a whole, and the transmission shaft inside a seal casing is provided at the upper end with a bearing component, a motor rotor component and a motor stator component in sequence, and at the lower end an impeller (set) and a balance device. The utility model has advantages that: the motor is incorporated with as a whole, the pump body without shaft seal device, zero leakage of the liquefied petroleum gas pump is realized with safe application and zero potential hazard, and operation of the pump is smooth and reliable.
Description
The utility model relates to a kind of pumping installations, is particularly suitable for carrying inflammable and explosive liquefied petroleum gas (LPG).
Depending primarily on the reliability that axle seals aspect the safe operation with pump transportation of liquefied petroleum gas.Because most liquid gas are inflammable and explosive dangerous substances, for example: methane, ethane, propane, butane, ethene, propylene etc.Carry these lower boiling liquid with pump, not only have problems such as cryogenic material embrittlement, the easy vaporization of liquid, and also have features such as low flash point, low viscosity, high-vapor-pressure.Slip end face in mechanical seal is difficult to keep stable fluid liquid film, and because of vaporizing liquid causes dry friction, end face is easy to freeze when pump startup, thereby end wear can take place.So the axle envelope problem that solves this class fluid at most and the most difficult.Also have cryogenic liquide with the medium of the similar performance of liquefied petroleum gas (LPG), as: liquid oxygen, liquefied ammonia, liquid hydrogen etc. when carrying this class medium, exist the problems referred to above too.So in petroleum chemical industry, the user of this kind pump has in use paid very high cost.
Except mechanical seal select for use with using process in exist the problems referred to above, in some liquefied gas devices, the condition of device proper makes selecting for use of pump become more harsh.As ethylene unit in, all the liquefied gas storage jar can be arranged, will dispose several or more liquid gas transfer pump in the bottom of liquefied gas storage jar.But because the particularity of liquid gas, make that the state of liquid gas in the liquefied gas storage jar is saturated or little hypersaturated state, pressure in the storage tank often is exactly the saturation vapour pressure of liquid gas, inlet at pump just can only provide the pressure that is higher than saturation vapour pressure that produces by pouring in down a chimney like this, it is very low promptly to install net positive suction head, thereby require pump that very strong anti-cavitation performance must be arranged, to satisfy behaviour in service.
The purpose of this utility model is to provide a kind of liquefied petroleum gas pump, and the structure that it adopts the motor and the pump housing to be combined into one has realized the zero leakage of pump, to improve the reliability and security of medium transport.
The purpose of this utility model is achieved in that a kind of liquefied petroleum gas pump, comprise motor, the pump housing, transmission shaft, impeller, its special way is that motor and pump are structure as a whole, transmission shaft is positioned at seal casinghousing fully, its upper end is provided with bearing part, motor rotor part and motor stator parts successively, and the lower end is followed successively by impeller (group) and Equilibrator.
Described motor is the disc type asynchronous motor, and its stator iron core and rotor iron core bury casting respectively in rotor and rotor body, and rotor is fastened on the electric machine casing, and rotor body is enclosed within on the transmission shaft, drives by flat key, and stator pole faces shields with nonmetal barrier film.
Between bearing bore and rotor chamber, be provided with the mechanical seal parts of realizing seal isolation.
Between motor stator chamber and pump import and export section is buffer cavity, is provided with sub-propeller and buffer in the chamber, and wherein sub-propeller need lean on a last flat key to drive, and buffer then is fastened on the electric machine casing.
Transmission shaft Equilibrator bottom is a balancing drum, and the pressure that its acceptance attracts from external pressure source is to offset the residual axial force of motor.
The difference of the utility model and existing liquefied petroleum gas pump is that the pump housing and electric machine casing adopt integrative-structure, be that electric machine casing is connected with the pump housing, transmission shaft is in the seal casinghousing fully, so just can avoids adopting the gland seal device sealing easily to cause the problem of leakage between the transmission shaft and the pump housing in the past.For guaranteeing that liquefied petroleum gas pump operates steadily, rotor is fastened on the electric machine casing, rotor body is connected by flat key with transmission shaft, and the pole-face of stator adopts the bonding shielding of nonmetallic material, and this mounting type can be offset the axial force that wheel rotation produces by the magnetic force that motor rotation produces.In order to realize the complete equilibrium of axial force, also be provided with Equilibrator bottom at rotatingshaft, according to the operating conditions of pump, adjust the pressure be applied on the Equilibrator, reaching the purpose of axial force complete equilibrium, thereby guarantee the smooth running of pump.
After the motor and the pump housing adopt integrative-structure, gas in the pump housing (gas that air and medium vaporization produce) certainly will enter in the electric machine casing, import and export the dynamical balancing between the section for guaranteeing the electric machine casing and the pump housing, be provided with buffer cavity betwixt, be provided with in the chamber by axle and go up the sub-propeller that flat key drives and be fastened on buffer on the electric machine casing, in order to prevent to enter the gas attack stator of motor cavity, the pole-face of stator adopts the bonding shielding of nonmetallic material.
Characteristics of the present utility model are: motor and the pump housing adopt integral structure, need not gland seal device, can realize that zero of liquefied petroleum gas pump reveals, and safe in utilization, no potential safety hazard; Pump operation steadily, reliably.
Accompanying drawing is a structural representation of the present utility model.
Be described in further detail below in conjunction with accompanying drawing:
As shown in the figure, electric machine casing is imported and exported section with pump and is connected, and junction plane is provided with seal ring.Electric machine casing 5 can be divided into four chambers: bearing bore, and Seal cage, stator and rotor chamber and buffer cavity, the top of electric machine casing is connected with upper end cap 22 and cooling-part 21.The pump housing is by interconnective import and export section 6, linkage section 7, derivation section 8, middle piece housing 9, supporting part 12 and balancing drum 13 constitute successively.Transmission shaft 17 is in the two housings.Bearing part 1 is installed in order to support whole rotor part in the bearing bore.Sealed member 2 is installed in the Seal cage, and it is separated into two mutual airtight chambers with bearing bore and stator and rotor chamber, oiling agent and pumped medium can be isolated.Rotor 3 and motor stator 4 are arranged in the stator and rotor chamber, and motor stator is fastened on the electric machine casing by cover 20 in the stator, and rotor is connected by flat key with transmission shaft, and the pole-face of motor stator adopts nonmetal diaphragm adhering shielding not corroded with the protection stator.Accessory lobes wheel 19 and buffer 18 are installed in the buffer cavity, and wherein sub-propeller need lean on a last flat key to drive, and buffer then is fastened on the electric machine casing.Hydraulic part inducer 16, first stage impeller 15, impeller 11 (2 to 14) and stator 10 (3 to 15) are installed in the chamber of middle piece housing, wherein inducer, first stage impeller, impeller are assemblied on the axle, rotate together with the axis, stator and middle piece housing drive fit, and by the stop pin radial location.Deriving section 8, middle piece housing 9 and support unit 12 is axially fastened by rod 14.
Claims (5)
1, a kind of liquefied petroleum gas pump, comprise motor, the pump housing, transmission shaft, impeller, it is characterized in that motor and pump are structure as a whole, transmission shaft is positioned at seal casinghousing fully, its upper end is provided with bearing part, motor rotor part and motor stator parts successively, and the lower end is followed successively by impeller (group) and Equilibrator.
2, liquefied petroleum gas pump according to claim 1, it is characterized in that described motor is the disc type asynchronous motor, its stator iron core and rotor iron core bury casting respectively in rotor and rotor body, rotor is fastened on the electric machine casing, rotor body is enclosed within on the transmission shaft, drive by flat key, stator pole faces shields with nonmetal barrier film.
3, liquefied petroleum gas pump according to claim 1 is characterized in that being provided with the mechanical seal parts of realizing seal isolation between bearing bore and rotor chamber.
4, liquefied petroleum gas pump according to claim 1 is characterized in that being buffer cavity that between motor stator chamber and pump import and export section be provided with sub-propeller and buffer in the chamber, wherein sub-propeller need lean on a last flat key to drive, and buffer then is fastened on the electric machine casing.
5, liquefied petroleum gas pump according to claim 1 is characterized in that transmission shaft Equilibrator bottom is a balancing drum, and the pressure that its acceptance attracts from external pressure source is to offset the residual axial force of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01241476 CN2490333Y (en) | 2001-04-28 | 2001-04-28 | Liquified petroleum gas pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01241476 CN2490333Y (en) | 2001-04-28 | 2001-04-28 | Liquified petroleum gas pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2490333Y true CN2490333Y (en) | 2002-05-08 |
Family
ID=33653470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01241476 Expired - Fee Related CN2490333Y (en) | 2001-04-28 | 2001-04-28 | Liquified petroleum gas pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2490333Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538491A (en) * | 2018-10-30 | 2019-03-29 | 浙江水利水电学院 | A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer |
| CN110685927A (en) * | 2019-11-04 | 2020-01-14 | 合肥新沪屏蔽泵有限公司 | Liquid cooling pump |
| CN116292346A (en) * | 2023-03-27 | 2023-06-23 | 山东凯格瑞森能源科技有限公司 | Vortex type hydrogen circulating pump device |
-
2001
- 2001-04-28 CN CN 01241476 patent/CN2490333Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538491A (en) * | 2018-10-30 | 2019-03-29 | 浙江水利水电学院 | A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer |
| CN109538491B (en) * | 2018-10-30 | 2021-01-12 | 浙江水利水电学院 | Multistage centrifugal pump with inducer and installation method thereof |
| CN110685927A (en) * | 2019-11-04 | 2020-01-14 | 合肥新沪屏蔽泵有限公司 | Liquid cooling pump |
| CN116292346A (en) * | 2023-03-27 | 2023-06-23 | 山东凯格瑞森能源科技有限公司 | Vortex type hydrogen circulating pump device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |