CN104131991A - Self-cooling circulation axial force carrying device for horizontal pump - Google Patents
Self-cooling circulation axial force carrying device for horizontal pump Download PDFInfo
- Publication number
- CN104131991A CN104131991A CN201410388050.1A CN201410388050A CN104131991A CN 104131991 A CN104131991 A CN 104131991A CN 201410388050 A CN201410388050 A CN 201410388050A CN 104131991 A CN104131991 A CN 104131991A
- Authority
- CN
- China
- Prior art keywords
- bearing
- axial force
- thrust bearing
- cooling
- cavity volume
- 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.)
- Granted
Links
Abstract
The invention discloses a self-cooling circulation axial force carrying device for a horizontal pump. The self-cooling circulation axial force carrying device for the horizontal pump comprises a transmission shaft connected with a pump shaft. The transmission shaft is sequentially sleeved with a connecting piece, a thrust bearing unit and a tail end cover from left to right. The thrust bearing unit sequentially comprises a front bearing seat, a front bearing, a sliding block, a thrust bearing sector block, a thrust bearing bracket and a rear bearing seat from left to right, wherein the front bearing is matched with the front bearing seat. A curved surface circular truncated cone is arranged at the right end of the thrust bearing bracket. The left end face of the rear bearing seat is provided with a concave face matched with the curved surface circular truncated cone. A lubricating sleeve and a cooling sleeve are sequentially and fixedly connected between the front bearing seat and the rear bearing seat from inside to outside in the radial direction and a lubricating containing cavity and a cooling containing cavity are sequentially formed from inside to outside. Cooling liquid circulates between the cooling containing cavity and an inlet flange. According to the self-cooling circulation axial force carrying device for the horizontal pump, axial force can be borne, self-cooling circulation between the cooling containing cavity and a pump body is achieved, the service life of the carrying device is prolonged, and the use range of the carrying device is widened.
Description
Technical field
The present invention relates to a kind of pump, particularly self cooling circulation axial force bearing device for a kind of horizontal pump.
Background technique
Pump is widely used in the every field of industry, agricultural, in the national economic development, plays an important role.At present, the centrifugal high pressure water-injection pump of horizontal multi-stage is for fields such as oil field long distance feedwater, down-hole pressure water injection.Pump is in operation process, and on pump shaft, effect has axial force conventionally, and this power pulls rotor axial to move, and therefore must manage balance or eliminate axial force just to make pump normally work.Be commonly used at present on pump Equilibrator kind more, as balancing drum, Balance disc, equalizing orifice etc.For multistage high-pressure pump, in pump, total axial force is larger, therefore balancing axial thrust problem seems, is even more important.At present conventional balancing axial thrust method has six kinds: 1. the back-to-back layout balance of impeller; The pump structure of applying this kind of method is complicated, and manufacture cost is high; 2. balance cylinder is established at the impeller back side; The axial force of this method balance is not thorough, has remnants, and use can cause accumulation residual axial force excessive in multistage pump; 3. after impeller, add balancing drum; The axial force of this method balance is not thorough, and it is excessive that in multistage pump, use can cause accumulation residual axial force; 4. impeller back shroud is established Balance disc; This kind of method is higher to the designing requirement of Balance disc, and in different pumps, needs to use different Balance discs; 5. after impeller, add balancing drum, Balance disc, gimbal combined unit; Design and installation is complicated, and reliability is low; 6. add stabilized pressure pump; The axial force of this kind of method is mainly to carry by bearing in motor, and stabilized pressure pump spoilage is high, the poor reliability of complete machine group.In above six kinds of balancing axial thrust methods all in various degree exist manufacture complicated, maintenance difficult, reliability is low, axial force balance weak effect, thermal discharge is high, manufactures the variety of problems such as installation cost height.Tradition loader inner utilization rolling bearing and sliding bearing be used in combination to bear axial force, in running, exist thermal discharge high, the life-span is short, axial force and radial force low bearing capacity cannot carry out the problems such as secondary maintenance.
Summary of the invention
The present invention provides a kind of and can solve pump axial force balance and cooling self cooling circulation axial force bearing device for horizontal pump for solving the technical problem existing in known technology.
The technological scheme that the present invention takes for the technical problem existing in solution known technology is: self cooling circulation axial force bearing device for a kind of horizontal pump, comprise suction flange and pump shaft, also comprise the transmission shaft being connected with described pump shaft, on described transmission shaft, be socketed successively from left to right link, thrust bearing unit and afterbody end cap; Between described link and described afterbody end cap and described transmission shaft, be equipped with mechanical seal; Described thrust bearing unit comprises the front axle bearing arraying from left to right and anterior bearing, slide block, thrust bearing sector unit, thrust bearing bracket and the rear axle bearing coordinating with it; Described thrust bearing bracket left side is provided with scalloped recess, and described thrust bearing sector unit right side coordinates in the described scalloped recess of embedding; Described thrust bearing bracket right-hand member is provided with curved surface round platform, and the side up and down in described curved surface round platform axis cross section is arc, and the left side of described rear axle bearing is provided with the concave surface matching with described curved surface round platform; Described suction flange, described link and described front axle bearing are affixed successively; Described thrust bearing bracket, described rear axle bearing and described afterbody end cap are affixed successively; Between described front axle bearing and described rear axle bearing, be radially from inside to outside connected with successively lubricating sleeve and coolant jacket, and from inside to outside form successively lubricated cavity volume and cooling cavity volume; Described suction flange cavity volume and described cooling cavity volume are connected.
The present invention can also adopt following technological scheme:
Described curved surface round platform is sphere round platform.
Also comprise two circulating cooling pipes that connect described suction flange cavity volume and described cooling cavity volume, described two circulating cooling pipes are that same vertical line is arranged up and down.
Between described anterior bearing and described front axle bearing, be provided with adjusting pad.
Described thrust bearing sector unit and described thrust bearing bracket, be provided with O type circle between the two, and locate by pin.
Between described link and described transmission shaft, be provided with double mechanical seal and O type circle back-to-back.
Between described front axle bearing and described rear axle bearing and described transmission shaft, be equipped with cemented carbide axle sleeve and bronze plain bearing.
Described thrust bearing unit also comprises lock washer and little round nut, and described slide block is fixedly connected with transmission shaft by the key on transmission shaft, described lock washer and described little round nut.
Advantage and good effect that the present invention has are: adopt coolant jacket to form cooling cavity volume and structure and suction flange cavity volume UNICOM, make the cryogenic liquide that pump is carried enter cooling cavity volume, and high-temp liquid is back in suction flange cavity volume in cooling cavity volume, between realizing in cooling cavity volume and pump body from cool cycles, thereby cooling lubricant oil and the thrust bearing unit of lubricated cavity volume, improved working life and the using scope of loader, and without sink is set in addition, loader has been carried out to radiating treatment; Adopt thrust bearing carrying axial force, increased axial force carrying scope; Lubricated cavity volume is filled the grease of 1/3-1/2, adopts splash lubrication structure to reduce the thermal discharge of loader; Adopt the structure such as double mechanical seal and O type rubber seal back-to-back, reduced pump body to carrying the pressure rating requirement of liquid; In the working life that adopts cemented carbide axle sleeve and bronze plain bearing to strengthen bearing, increased the ability to radial force carrying.
The invention provides a kind of have simple in structure, easily manufactured, reliable performance, with low cost, axial force bearing capacity is high, extend the pump structure in working life.Solve the manufacture occurring in conventional axial equilibrium of forces method complicated, with high costs, safeguarded inconvenience, thoroughly do not had the problems such as remnants, poor reliability, thermal discharge height.The working life of pump be can effectively raise, maintenance period and maintenance cost reduced.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the sectional view that the Vertical direction of Fig. 1 is dissectd;
Fig. 3 is the sectional view that the substantially horizontal of Fig. 1 is dissectd.
In figure: 1, suction flange; 2, mechanical seal; 3, link; 4, front axle bearing; 5, lubricating sleeve; 6, coolant jacket; 7, slide block; 8, thrust bearing sector unit; 9, rear axle bearing; 10, afterbody end cap; 11, bearing shell; 12, transmission shaft; 13, axle sleeve; 14, positioning ring; 15, thrust bearing bracket; 16, O type circle; 17, little round nut; 18, pin; 19, lock washer; 20, anterior bearing; 21, setting sleeve; 22, pipe joint; 23, lubricated cavity volume; 24, cooling cavity volume; 25, cocycle cooling tube; 26, lower circulating cooling pipe; 27, cooling liquid water filling hole.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1～Fig. 3, a self cooling circulation axial force bearing device for horizontal pump, comprises suction flange 1 and pump shaft, also comprises the transmission shaft 12 being connected with described pump shaft, on described transmission shaft 12, be socketed successively from left to right link 3, thrust bearing unit and afterbody end cap 10; Between described link 3 and described afterbody end cap 10 and described transmission shaft, be equipped with mechanical seal 2; Described thrust bearing unit comprises the front axle bearing 4 arraying from left to right and anterior bearing 20, slide block 7, thrust bearing sector unit 8, thrust bearing bracket 15 and the rear axle bearing 9 coordinating with it; Described thrust bearing bracket 15 left sides are provided with scalloped recess, and the right side of described thrust bearing sector unit 8 coordinates in the described scalloped recess of embedding; Described thrust bearing bracket 15 right-hand members are provided with curved surface round platform, and the side up and down in described curved surface round platform axis cross section is arc, and the left side of described rear axle bearing 9 is provided with the concave surface matching with described curved surface round platform; Described suction flange 1, described link 3 and described front axle bearing 4 are affixed successively; Described thrust bearing bracket 15, described rear axle bearing 9 and described afterbody end cap 10 are affixed successively; Between described front axle bearing 4 and described rear axle bearing 9, be radially from inside to outside connected with successively lubricating sleeve 5 and coolant jacket 6, and from inside to outside form successively lubricated cavity volume 23 and cooling cavity volume 24; The cavity volume of described suction flange 1 and described cooling cavity volume 24 are connected.。
The curved surface round platform of described thrust bearing bracket 15 right-hand members, by transversal formation such as spheroid, spheroids, the dual-side up and down of its shaft section is symmetrical curved line, this curved line rotates to form curved surface around axis; The sphere round platform that the preferred curved surface of curved surface round platform of described thrust bearing bracket 15 right-hand members is spherical shape, now curved line is a part for circle, the concave surface of the left side of described rear axle bearing 9 matches with the curved surface round platform of described thrust bearing bracket 15 right-hand members, guarantees so described thrust bearing bracket 15 self-alignments.
In addition, this device also can comprise two circulating cooling pipes that connect described suction flange cavity volume and described cooling cavity volume 24, refer to Fig. 3, cocycle cooling 25 and lower circulating cooling 26, described two circulating cooling pipes can be same vertical line and arrange up and down, wherein cocycle cooling 25 is upper, lower circulating cooling 26 below, article two, up and down over against layout, lubricating sleeve surface temperature not higher than coolant jacket in during the vapourizing temperature of liquid, utilize the height difference of cocycle cooling tube 25 and lower circulating cooling pipe 26, and the temperature difference of the interior liquid of cooling cavity volume 24 and suction flange appearance intracavity liquid, realize the heat exchange that the interior liquid of cooling cavity volume 24 and suction flange hold intracavity liquid, thereby reduced the room temperature of lubricated cavity volume 23.When lubricating sleeve surface temperature is during higher than the interior vaporizing liquid temperature of cooling cavity volume 24, there are a large amount of saturated gases in cold but cavity volume 24 tops, by cocycle cooling tube 25, overflow, the interior generation negative pressure of cooling cavity volume 24 now, cryogenic liquide in the cooling cavity volume 24 of the interior inflow of lower cool cycles pipe 26, keeps the lubricated interior temperature of cavity volume 23 unlikely too high.
Between described anterior bearing 20 and described front axle bearing 4, can be provided with adjusting pad, in order to distance between adjusting slider and anterior bearing.
Described thrust bearing sector unit 8 and described thrust bearing bracket 15, can be provided with O type circle 16 between the two, and can by pin 18 connect and other modes affixed, location.
Described thrust bearing bracket 15 and described rear axle bearing 9 can be connected by screw and other modes affixed.
Between described link 3 and described transmission shaft 12, can be provided with double mechanical seal and O type circle back-to-back, further improve sealability.
Keep the lubricated interior lubricant oil of cavity volume 23 to be filled to 1/3 to 1/2 of lubricated cavity volume; Thereby realize splash lubrication bearing rotary and slide member.
Between described front axle bearing and described rear axle bearing and described transmission shaft 12, can be equipped with cemented carbide axle sleeve 13 and bronze plain bearing 11, thereby increase the ability to radial force carrying the working life that has strengthened bearing.
Described thrust bearing unit also can comprise lock washer 19 and roundlet nut 17, described slide block 7 can be fixedly connected with transmission shaft by the key on transmission shaft 12, described lock washer 19 and described roundlet nut 17, described roundlet nut 17 is threaded with transmission shaft, lock little round nut, thereby fastening lock washer 19 and slide block 7, thereby be convenient to install and regulate.
Working principle of the present invention:
Described axle sleeve, slide block are rotated by key transmitting torque on axle, between thrust bearing sector unit 8 and thrust bearing bracket 15, by pin 18 and O type circle 16, position and fix, between thrust bearing bracket 15 and described tail bearing seat 9, by screw, be connected, between suction flange 1, link 3, thrust shaft block 4, lubricating sleeve 5, tail bearing seat 9, afterbody end cap, by high-strength bolt, connect.Suction flange 1 cavity volume is connected with cooling cavity volume 24 by cocycle cooling tube 25 and lower circulating cooling pipe 26; Mechanical seal 2 has formed sealing system with O type circle 16, wherein mechanical seal 2 adopts positive and negative two groups of mechanical seals at nearly feed-water end, it is soft-hard and hard-hard that material is respectively, back-to-back, by double mechanical seal and O type circle 16 back-to-back, thrust bearing unit and transmission shaft are sealed, liquid that pump is carried is carried out to isolating seal; Rely on lubricated cavity volume 23 in-lubricants to absorb the heat producing when thrust bearing unit bears axial force, and pass to the interior cooling liquid of cooling cavity volume 24 by lubricating sleeve 5, after cooling liquid absorbs heat, circulation is flowed out.Lubricating sleeve surface temperature not higher than coolant jacket in during the vapourizing temperature of liquid, utilize the height difference of cocycle cooling tube 25 and lower circulating cooling pipe 26, and the temperature difference of the interior liquid of cooling cavity volume 24 and suction flange appearance intracavity liquid, realize the heat exchange that the interior liquid of cooling cavity volume 24 and suction flange hold intracavity liquid, thereby reduced the room temperature of lubricated cavity volume 23.When lubricating sleeve surface temperature is during higher than the interior vaporizing liquid temperature of cooling cavity volume 24, there are a large amount of saturated gases in cold but cavity volume 24 tops, by cocycle cooling tube 25, overflow, the interior generation negative pressure of cooling cavity volume 24 now, cryogenic liquide in the cooling cavity volume 24 of the interior inflow of lower cool cycles pipe 26, keeps the lubricated interior temperature of cavity volume 23 unlikely too high.
Initially should make fluid lubricant capacity in described lubricating sleeve should be 1/3～1/2 of lubricated cavity volume 23 volumes, can form splash system lubrication like this; Just begin, by cooling liquid water filling hole 27, cooling liquid is filled with to whole cooling cavity volume 24, also can before unit running, make cooling liquid from flowing in suction flange cavity volume and being full of cooling cavity volume 24.
Erection sequence of the present invention:
Slide block 7 is fixed on transmission shaft 12 by the key on transmission shaft 12 and lock washer 19, roundlet nut 17, and positioning ring 14 and axle sleeve 13 are sleeved on transmission shaft 12, bearing shell 11 press-fits to rear axle bearing 9, the thrust bearing sector unit 8 that assembling is completed is connected with rear axle bearing 9 by bolt with thrust bearing bracket 15, guarantee the sphere curved surface of the sphere round platform of thrust bearing bracket 15 right-hand members, can in the left end concave surface of rear axle bearing 9, corresponding spherical inside surface partly move up and down; Install mechanical seal on transmission shaft 12 after, afterbody end cap 10 and rear axle bearing 9 are passed through to bolton.Now that lubricating sleeve 5 and rear axle bearing 9 use are affixed by screw and briquetting, the lubricated interior assurance foreign of cavity volume 23, anterior bearing 20 is with front axle bearing 4 by screw fastening, and front axle bearing 4 is affixed by screw with lubricating sleeve 5, and now the axial movement value of transmission shaft 12 should meet designing requirement; Positive mechanical seal 2, link 3, anti-mechanical seal 2 are installed successively, and the Placement of link 3 is that high-strength bolt connects; Circulating cooling cover 6 and suction flange 1, cocycle cooling tube 25 pipes, lower circulating cooling pipe 26 pipes are installed successively, installation.
Claims (8)
1. a self cooling circulation axial force bearing device for horizontal pump, comprises suction flange and pump shaft, it is characterized in that, also comprises the transmission shaft being connected with described pump shaft, on described transmission shaft, is socketed successively from left to right link, thrust bearing unit and afterbody end cap; Between described link and described afterbody end cap and described transmission shaft, be equipped with mechanical seal; Described thrust bearing unit comprises the front axle bearing arraying from left to right and anterior bearing, slide block, thrust bearing sector unit, thrust bearing bracket and the rear axle bearing coordinating with it; Described thrust bearing bracket left side is provided with scalloped recess, and described thrust bearing sector unit right side coordinates in the described scalloped recess of embedding; Described thrust bearing bracket right-hand member is provided with curved surface round platform, and the side up and down in described curved surface round platform axis cross section is arc, and the left side of described rear axle bearing is provided with the concave surface matching with described curved surface round platform; Described suction flange, described link and described front axle bearing are affixed successively; Described thrust bearing bracket, described rear axle bearing and described afterbody end cap are affixed successively; Between described front axle bearing and described rear axle bearing, be radially from inside to outside connected with successively lubricating sleeve and coolant jacket, and from inside to outside form successively lubricated cavity volume and cooling cavity volume; Described suction flange cavity volume and described cooling cavity volume are connected.
2. self cooling circulation axial force bearing device for horizontal pump according to claim 1, is characterized in that, described curved surface round platform is sphere round platform.
3. self cooling circulation axial force bearing device for horizontal pump according to claim 1, it is characterized in that, also comprise two circulating cooling pipes that connect described suction flange cavity volume and described cooling cavity volume, the layout up and down that described two circulating cooling pipes are same vertical line.
4. self cooling circulation axial force bearing device for horizontal pump according to claim 1, is characterized in that, between described anterior bearing and described front axle bearing, is provided with adjusting pad.
5. self cooling circulation axial force bearing device for horizontal pump according to claim 1, is characterized in that, described thrust bearing sector unit and described thrust bearing bracket, be provided with O type circle between the two, and locate by pin.
6. self cooling circulation axial force bearing device for horizontal pump according to claim 1, is characterized in that, is provided with double mechanical seal and O type circle back-to-back between described link and described transmission shaft.
7. self cooling circulation axial force bearing device for horizontal pump according to claim 1, is characterized in that, between described front axle bearing and described rear axle bearing and described transmission shaft, is equipped with cemented carbide axle sleeve and bronze plain bearing.
8. self cooling circulation axial force bearing device for horizontal pump according to claim 1, it is characterized in that, described thrust bearing unit also comprises lock washer and little round nut, and described slide block is fixedly connected with transmission shaft by the key on transmission shaft, described lock washer and described little round nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388050.1A CN104131991B (en) | 2014-08-07 | 2014-08-07 | The self cooling circulation axial force bearing device of a kind of horizontal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388050.1A CN104131991B (en) | 2014-08-07 | 2014-08-07 | The self cooling circulation axial force bearing device of a kind of horizontal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104131991A true CN104131991A (en) | 2014-11-05 |
| CN104131991B CN104131991B (en) | 2016-04-20 |
Family
ID=51804795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410388050.1A Active CN104131991B (en) | 2014-08-07 | 2014-08-07 | The self cooling circulation axial force bearing device of a kind of horizontal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104131991B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541839A (en) * | 2019-09-02 | 2019-12-06 | 丹东通博泵业有限公司 | Embedded thrust bearing assembly for magnetic pump and magnetic pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2633392A (en) * | 1951-03-09 | 1953-03-31 | Us Electrical Motors Inc | Thrust bearing |
| JPS6188014A (en) * | 1984-10-05 | 1986-05-06 | Hitachi Ltd | Thrust bearing device |
| CN201330753Y (en) * | 2008-12-30 | 2009-10-21 | 四川胜达泵业设备制造有限公司 | Self-cooling structure of multi-stage centrifugal pump |
| CN103790853A (en) * | 2012-10-29 | 2014-05-14 | 山东双轮股份有限公司 | Axial force balancing device |
| CN204003577U (en) * | 2014-08-07 | 2014-12-10 | 天津市百利溢通电泵有限公司 | A kind of self cooling circulation axial force bearing device for horizontal pump |
-
2014
- 2014-08-07 CN CN201410388050.1A patent/CN104131991B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2633392A (en) * | 1951-03-09 | 1953-03-31 | Us Electrical Motors Inc | Thrust bearing |
| JPS6188014A (en) * | 1984-10-05 | 1986-05-06 | Hitachi Ltd | Thrust bearing device |
| CN201330753Y (en) * | 2008-12-30 | 2009-10-21 | 四川胜达泵业设备制造有限公司 | Self-cooling structure of multi-stage centrifugal pump |
| CN103790853A (en) * | 2012-10-29 | 2014-05-14 | 山东双轮股份有限公司 | Axial force balancing device |
| CN204003577U (en) * | 2014-08-07 | 2014-12-10 | 天津市百利溢通电泵有限公司 | A kind of self cooling circulation axial force bearing device for horizontal pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541839A (en) * | 2019-09-02 | 2019-12-06 | 丹东通博泵业有限公司 | Embedded thrust bearing assembly for magnetic pump and magnetic pump |
| CN110541839B (en) * | 2019-09-02 | 2024-04-09 | 丹东通博泵业有限公司 | Embedded thrust bearing assembly for magnetic drive pump and magnetic drive pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104131991B (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103184990B (en) | Oblique plunger type pure water hydraulic swash plate pump | |
| CN205977713U (en) | Novel canned motor pump structure for air conditioning unit | |
| CN204003577U (en) | A kind of self cooling circulation axial force bearing device for horizontal pump | |
| CN104976133B (en) | A kind of high-temperature water pump of the mechanical seal with Vortex pump enclosed self-circulation system | |
| CN104131991B (en) | The self cooling circulation axial force bearing device of a kind of horizontal pump | |
| CN210423440U (en) | Tilting pad bearing lubricated by refrigerant | |
| CN208845370U (en) | A kind of centrifugal pump with water-cooled pump cover and sealing gland | |
| CN207892875U (en) | Vertical long pump for liquid salts carries oil lubrication device | |
| CN209244925U (en) | A kind of energy-saving engine cooling water pump | |
| CN113775651A (en) | Gate pump with water lubricated bearing | |
| CN204349709U (en) | A kind of high speed mining diving pump wet type electric motor | |
| CN208874395U (en) | Hydrogen cooled generator double fluid ring sealing bearing bush with wedged-shaped oil film film strips viscous flow groove | |
| CN207485672U (en) | For the high-pressure pump of seawater desalination system | |
| CN208236658U (en) | A kind of double suction second level middle open centrifugal pump | |
| CN205330868U (en) | Radial axle bush and have hydraulic generator thrust bearing of this radial axle bush | |
| CN204985034U (en) | Dry -type pump bearing retainer | |
| CN207246035U (en) | High-temperature melting salt pump | |
| CN105927542A (en) | Rotor shaft seal structure for double-screw compressor | |
| CN204961379U (en) | Dry -type pump bearing retainer | |
| CN106246129B (en) | Multifunctional polish rod sealing device | |
| CN208858649U (en) | A kind of new pump fixed ring cooling system | |
| CN216867354U (en) | Structure for shell working cavity in hydraulic retarder | |
| CN205977697U (en) | Chemical pump is supported at modified two -stage, chopped -off head double suction, radial subdivision, both ends | |
| CN204371757U (en) | A kind of forced circulation pump | |
| CN202718902U (en) | Thrust bearing structure used for axial flow pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |