CN114810579B

CN114810579B - Single screw pump

Info

Publication number: CN114810579B
Application number: CN202210434950.XA
Authority: CN
Inventors: 孙丽
Original assignee: Shanghai Shenbei Pump Manufacturing Co ltd
Current assignee: Shanghai Shenbei Pump Manufacturing Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2024-02-27
Anticipated expiration: 2042-04-24
Also published as: CN114810579A

Abstract

The application relates to the technical field of screw pump equipment, in particular to a single-screw pump, which comprises a pump shell and a material sucking cavity, wherein an inner casing is arranged in the pump shell, and a stator casing is arranged on the inner wall of the inner casing; the inner shell comprises a first shell inserted into the pump shell and a second shell arranged on the first shell in a sliding manner, a sliding groove for the second shell to slide is formed in the inner wall of the first shell, the inner wall of the first shell and the inner wall of the second shell are located on the same horizontal plane, an inserting block is arranged on the end face of one end, facing away from the sliding groove, of the second shell, a slot matched with the inserting block is formed in the end face, facing towards the inserting block, of the first shell, and when the inserting block is in plug-in fit with the slot, the inner wall of the first shell and the inner wall of the second shell form a complete circle; the stator casing includes the first stator of grafting setting on the inner wall of first casing and the second stator of grafting setting on the inner wall of second casing, and stator casing is constituteed to first stator and second stator, and this application has the effect of the dismouting of the single screw pump rotor of being convenient for.

Description

Single screw pump

Technical Field

The application relates to the technical field of screw pump equipment, in particular to a single-screw pump.

Background

The single screw pump is a rotor type volumetric pump, and it relies on the mutual engagement of screw and bush to produce volume change in suction cavity and discharge cavity to deliver liquid. The internal-meshed closed screw pump consists of main working parts including lining with double-head screw cavity and single-head screw meshed with the lining in the stator cavity. When the input shaft drives the rotor to rotate around the center of the stator through the universal joint, the stator and the rotor pair are continuously meshed to form sealed cavities, the volumes of the sealed cavities do uniform axial motion constantly, conveying media are conveyed from the suction end to the extrusion end through the stator rotor pair, and the media sucked into the sealed cavity flow through the stator without being stirred and damaged.

The single screw pump has stable flow, small pressure pulsation, self-priming capability, low noise, high efficiency, long service life and reliable operation, and has irreplaceable function on delivering high-viscosity medium, and the viscosity is 0-200000 centipoise.

In the prior art, the rotor of the single-screw pump is difficult to install, and the medium is filled in the stator cavity after the rotor is used, so that the rotor is more troublesome to disassemble, and the inventor considers that a stator cavity convenient to disassemble is needed so as to facilitate the disassembly and assembly of the rotor of the single-screw pump.

Disclosure of Invention

In order to facilitate disassembly and assembly of a single-screw pump rotor, the present application provides a single-screw pump.

The application provides a single screw pump adopts following technical scheme:

the single-screw pump comprises a pump shell and a material sucking cavity, wherein an inner casing is arranged in the pump shell, a stator casing is arranged on the inner wall of the inner casing, a rotor is rotatably arranged in the stator casing, and the material sucking cavity is arranged at one end of the pump shell and is communicated with the inner cavity of the stator casing;

the inner shell comprises a first shell inserted into the pump shell and a second shell arranged on the first shell in a sliding manner, wherein the first shell and the second shell are arc-shaped shells, a sliding groove for sliding of the second shell is formed in the inner wall of the first shell, the inner wall of the first shell and the inner wall of the second shell are positioned on the same horizontal plane, an inserting block is arranged on the end face, facing away from the sliding groove, of the second shell, a slot matched with the inserting block is formed in the end face, facing towards the inserting block, of the first shell, and when the inserting block is in plug-in fit with the slot, the inner wall of the first shell and the inner wall of the second shell form a complete circle;

the stator shell comprises a first stator and a second stator, wherein the first stator is inserted and arranged on the inner wall of the first shell, the second stator is inserted and arranged on the inner wall of the second shell, and the first stator and the second stator form the stator shell.

By adopting the technical scheme, when the rotor is installed, the rotor and the first stator are correspondingly installed, the first stator and the second stator are correspondingly spliced to form a stator shell, the rotor is installed in the stator shell, the second shell is pulled out from the sliding groove until the insert block on the second shell is inserted into the slot of the first shell to form a complete circular inner shell, the stator shell with the rotor is installed in the inner shell, and finally the inner shell is integrally inserted into the pump shell to form the single screw pump; when the rotor is detached, the inner shell is taken out from the pump shell and gradually detached, so that the rotor is detached, and the rotor of the single-screw pump is convenient to detach.

Optionally, a fixing component is disposed on a side wall of the first casing, which faces away from the material sucking cavity, and a mounting hole adapted to the fixing component is formed in the pump casing.

Through adopting above-mentioned technical scheme, the cooperation of utilizing fixed subassembly and mounting hole has realized the relative fixation between inner bag casing and the pump case, and then has reduced the relative movement that takes place between inner bag casing and the pump case in the single screw pump working process and has led to the fact the possibility of pump body damage.

Optionally, the inner wall of the pump shell is provided with a bump attached to the outer wall of the second shell, the inner wall of the pump shell is provided with a positioning groove, and the outer wall of the first shell is provided with a positioning block matched with the positioning groove.

Through adopting above-mentioned technical scheme, through the grafting cooperation of locating piece and constant head tank and the spacing of lug, realize the quick installation location between inner bag casing and the pump case, the spacing of lug has simultaneously reduced the plug on the second casing and has led to the possibility in gap appearing between first stator and the second stator in the constant head tank under the pump body vibration influence through the spacing of lug, and then has reduced the possibility that the clearance appears between rotor and the stator casing and lead to pumping efficiency reduction.

Optionally, a discharge cavity is arranged at one end of the pump shell, which is away from the suction cavity, and the discharge cavity is communicated with the inner cavity of the stator shell.

Through adopting above-mentioned technical scheme, through the ejection of compact chamber with stator housing inner chamber intercommunication, play the effect of direction ejection of compact to the medium of screw pump pumping, reduced the possibility that the pumping medium splashes and improved the efficiency of pumping simultaneously.

Optionally, the one side that inhale the material chamber and deviate from the pump case is provided with the drive rotor pivoted drive assembly, drive assembly is including setting up inhale the material chamber and deviate from the bearing seal of pump case one side, cover establish at the transmission seat outside the bearing seal, rotate the pump shaft that sets up in the transmission seat and set up the transmission part between rotor and the pump shaft, the pump shaft is fixed with outside actuating source, the rotor is in under the transmission part drives along with the pump shaft rotates.

Through adopting above-mentioned technical scheme, drive assembly is used for driving the rotor and rotates, and then realizes inhaling the row to the medium through the gyration of rotor and stator casing, and the bearing seal has reduced the possibility that the medium flows through inhaling the clearance between material chamber and the transmission seat in the pump body pumping process, has reduced the possibility that outside air flows into the pump through the clearance and leads to pumping efficiency to reduce or the pumping can't go up the medium simultaneously.

Optionally, a plurality of supports are arranged on the side wall of the bottom of the transmission seat.

Through adopting above-mentioned technical scheme, install a plurality of support on the drive seat, the holistic location installation of single-screw pump of being convenient for has also improved the stability of single-screw pump during operation simultaneously.

Optionally, teflon coatings are arranged on the inner walls of the first stator and the second stator.

By adopting the technical scheme, the medium pumped by the single-screw pump is sometimes corrosive and sticky, and the Teflon coating is arranged on the inner walls of the first stator and the second stator, so that the Teflon has excellent performances of chemical stability, corrosion resistance, non-tackiness, high temperature resistance and the like, the possibility of low transmission efficiency caused by the adhesion of the pumped medium on the inner wall of the stator shell is reduced, the corrosion resistance of the stator shell is improved, and the service life of the stator shell is prolonged.

Optionally, a discharging hole is formed in the bottom wall of the material sucking cavity, and a sealing plug is detachably arranged in the discharging hole.

Through adopting above-mentioned technical scheme, after the pumping, will inhale the material chamber and the stator casing in the residual dielectric liquid is discharged in advance through the bin outlet, has reduced dielectric liquid and has stayed in the pump body for a long time and cause the pump body to block up or corrode the possibility that the pump body reduces the pump body life-span, the dismouting of the pump body of being convenient for simultaneously, the bin outlet is plugged through the sealing plug after the discharge is accomplished, guarantees the normal operating of single screw pump.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the rotor is installed, the rotor is correspondingly installed with the first stator, the first stator and the second stator are correspondingly spliced to form a stator shell, the rotor is installed in the stator shell, the second shell is pulled out of the sliding groove until an inserting block on the second shell is inserted into a slot of the first shell to form a complete circular inner shell, the stator shell with the rotor is installed in the inner shell, and finally the inner shell is integrally inserted into a pump shell to form a single-screw pump; when the rotor is detached, the inner shell is taken out from the pump shell and gradually detached, so that the rotor is detached, and the rotor of the single-screw pump is convenient to detach.

2. Through the grafting cooperation of locating piece and constant head tank and the spacing of lug, realize the quick installation location between inner bag casing and the pump case, the spacing of lug has reduced simultaneously and has led to the possibility of gap to appear between first stator and the second stator from the constant head tank in the interior slip of constant head tank under the pump body vibration influence of the plug on the second casing, and then has reduced the possibility that the clearance appears between rotor and the stator casing and lead to pumping efficiency to reduce.

3. Through set up the teflon coating on first stator and second stator inner wall, both reduced pumping medium adhesion and led to the possibility that transmission efficiency is low on stator housing inner wall, improved the corrosion resistance of stator housing again and then improved stator housing's life.

Drawings

Fig. 1 is an isometric view of an overall structure of a single screw pump embodying mainly one embodiment of the present application.

Fig. 2 is a schematic diagram of the internal structure of a single screw pump according to an embodiment of the present application.

Fig. 3 is a schematic diagram of an explosion structure mainly showing the structure of an inner casing and a pump casing in the embodiment of the present application.

Reference numerals: 1. a material suction cavity; 2. a feed inlet; 3. a pump housing; 4. a drive assembly; 41. a shaft seal; 42. a transmission seat; 43. a pump shaft; 44. a transmission member; 441. a universal joint; 442. a connecting rod; 5. an inner bag housing; 51. a first housing; 52. a second housing; 6. a stator housing; 61. a first stator; 62. a second stator; 7. a rotor; 8. a slip groove; 9. pulling blocks; 10. inserting blocks; 11. a slot; 12. a positioning block; 13. a positioning groove; 14. a bump; 15. a fixing assembly; 151. ear plates; 152. countersunk head bolts; 16. a caulking groove; 17. a mounting hole; 18. a spiral cavity; 19. a teflon coating; 20. a discharge port; 21. a sealing plug; 22. a discharge cavity; 23. and (5) a support.

Description of the embodiments

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses a single-screw pump.

Referring to fig. 1, a single screw pump comprises a suction cavity 1, a pump shell 3, a driving component 4 and a discharge cavity 22, wherein a feed inlet 2 is integrally formed at the upper end of one side of the suction cavity 1, the pump shell 3 is fixedly arranged on one side of the suction cavity 1, which is away from the feed inlet 2, through bolts, the driving component 4 is arranged on one side of the suction cavity 1, which is close to the feed inlet 2, and provides power required by working for the single screw pump, the discharge cavity 22 is fixedly arranged on one side of the pump shell 3, which is away from the suction cavity 1, plays a role in guiding and discharging media pumped by the screw pump, reduces the possibility of splashing of pumped media and simultaneously improves the pumping efficiency.

Referring to fig. 1 and 2, the driving assembly 4 includes a shaft seal 41, a transmission seat 42 and a pump shaft 43, the shaft seal 41 is coaxially inserted on a side wall of one end of the suction cavity 1, which is close to the feed inlet 2, and is fixedly connected with the suction cavity 1 through a bolt, the transmission seat 42 is coaxially sleeved on an outer wall of the shaft seal 41 and is fixedly welded with the shaft seal 41, the pump shaft 43 is rotatably installed in the transmission seat 42 through a bearing, one end of the pump shaft 43 penetrates through the shaft seal 41 to extend into the cavity of the suction cavity 1, and the other end of the pump shaft 43 extends out of the transmission seat 42 and is fixedly connected with an external driving source, which in this embodiment can be a variable speed motor.

Referring to fig. 1 and 2, the driving assembly 4 further includes a transmission component 44, where the transmission component 44 is installed in the cavity of the suction cavity 1, and the transmission component 44 includes two universal joints 441, where the two universal joints 441 are fixedly connected by a connecting rod 442, and one of the universal joints 441 is coaxially sleeved on the outer wall of the end of the pump shaft 43 extending into the suction cavity 1.

Referring to fig. 2 and 3, a single screw pump further includes an inner casing 5, a stator casing 6 and a rotor 7, where the inner casing 5 is coaxially installed in the pump casing 3, the stator casing 6 is coaxially installed in the inner casing 5, the rotor 7 is rotatably installed in the stator casing 6, and a universal joint 441 on one side of a transmission part 44 facing away from the transmission seat 42 is coaxially sleeved on an outer wall of one end of the rotor 7, and drives the rotor 7 to perform planetary rotation in an inner cavity of the stator casing 6 through the universal joint 441, so as to realize a pumping function.

Referring to fig. 3, the inner casing 5 includes a first casing 51 and a second casing 52, where the first casing 51 and the second casing 52 are arc casings, and the arc length of the first casing 51 is greater than that of the second casing 52, a sliding groove 8 is formed on the inner wall of the first casing 51 along the axis direction of the first casing, the second casing 52 is slidably mounted in the sliding groove 8, and the inner wall of the second casing 52 and the inner wall of the first casing 51 are located in the same horizontal plane.

The second casing 52 deviates from and slides and integrally formed on the outer wall of groove 8 have with the big pull block 9 of first casing 51 length direction side class, and the pull block 9 deviates from the one side integrated into one piece of second casing 52 and has inserted block 10, offered on the first casing 51 lateral wall with the slot 11 of insert block 10 looks adaptation, be convenient for the workman to add second casing 52 through pull block 9 and pull out from sliding in groove 8, when the insert block 10 pegged graft completely in the slot 11, pull block 9 lateral wall and the butt of first casing 51 lateral wall, first casing 51 inner wall and second casing 52 inner wall constitute a complete circular.

Referring to fig. 2 and 3, the inner casing 5 is inserted into the pump casing 3, the outer wall of the first casing 51 abuts against the inner wall of the pump casing 3, the outer wall of the first casing 51 is integrally formed with a positioning block 12, and the inner wall of the pump casing 3 is provided with a positioning groove 13 for positioning and inserting the positioning block 12.

Referring to fig. 3, the inner wall of the pump housing 3 is further integrally formed with a bump 14, and when the first housing 51 is engaged with the second housing 52 through the insert 10, the bump 14 abuts against the outer wall of the second housing 52, thereby positioning the second housing 52.

Referring to fig. 2 and 3, first casing 51 and inhale material chamber 1 through fixed subassembly 15 fixed connection, fixed subassembly 15 includes otic placode 151 and countersunk bolt 152, the otic placode 151 is provided with two along first casing 51 axial interval, and two otic placode 151 integrated into one piece are on the lateral wall that first casing 51 deviates from inhale material chamber 1, countersunk bolt 152 is provided with two, and two countersunk bolts 152 wear to establish respectively on two otic placode 151, set up the caulking groove 16 with two otic placode 151 looks adaptations on the lateral wall that pump case 3 deviates from inhale material chamber 1, set up on the caulking groove 16 inner wall with countersunk bolt 152 threaded connection's mounting hole 17, in the fixed time, inlay the otic placode 151 into the caulking groove 16 on the pump case 3, rethread countersunk bolt 152 locks, convenient and fast.

Referring to fig. 2 and 3, the stator housing 6 includes a first stator 61 and a second stator 62, the first stator 61 and the second stator 62 are two semicircular arc plates symmetrically arranged, the first stator 61 and the second stator 62 are spliced together to form a cylindrical stator housing 6, and spiral cavities 18 for the rotor 7 to perform planetary motion are formed on the inner walls of the first stator 61 and the second stator 62, so that pumping of media is realized.

When the stator is installed, the first stator 61 and the second stator 62 are placed into the inner cavity of the first shell 51 through hand supporting and splicing, and then the second shell 52 is rotated, so that the second shell 52 is engaged with the first shell 51, and the stator shell 6 is clamped and fixed in the inner shell 5.

Referring to fig. 2 and 3, teflon coating 19 is coated on the inner walls of the spiral cavities 18 of the first stator 61 and the second stator 62, so that the possibility of low transmission efficiency caused by adhesion of pumping medium on the inner wall of the stator housing 6 is reduced, and the corrosion resistance of the stator housing 6 is improved, thereby prolonging the service life of the stator housing 6.

Referring to fig. 1 and 2, a discharge hole 20 is formed in the bottom wall of the suction cavity 1, a sealing plug 21 is connected to the discharge hole 20 in an internal thread manner, residual medium liquid in the suction cavity 1 and the stator housing 6 is discharged in advance through the discharge hole 20 after pumping is finished, the possibility that the pump body is blocked or corroded by the medium liquid in the pump body for a long time to shorten the service life of the pump body is reduced, meanwhile, the pump body is convenient to disassemble and assemble, the discharge hole 20 is plugged through the sealing plug 21 after discharging is finished, and normal operation of the single screw pump is guaranteed.

Referring to fig. 1 and 2, a plurality of supports 23 are integrally formed on the bottom side wall of the transmission seat 42, and the plurality of supports 23 are arranged on the transmission seat 42, so that the whole positioning and mounting of the single-screw pump are facilitated, and meanwhile, the stability of the single-screw pump in operation is improved.

The implementation principle of the single-screw pump in the embodiment of the application is as follows: when the medium is to be pumped, the rotor 7 is arranged in the spiral cavity 18 in the first stator 61, the first stator 61 and the second stator 62 are spliced into the stator housing 6, the stator housing 6 is placed in the first housing 51, the second housing 52 is rotated, the second housing 52 is spliced with the first housing 51 through the matching of the insert block 10 and the slot 11, and the stator housing 6 is clamped and fixed in the inner housing body 5.

After the inner shell 5 and the stator shell 6 are installed, the combined whole is inserted into the pump shell 3, the inner shell 5 is fixed with the pump shell 3 through the lug plate 151, the rotor 7 is fixed with the universal joint 441 in the driving assembly 4, the pump shell 3 is fixedly connected with the material sucking cavity 1 through bolts, the material discharging cavity 22 is installed at one end, deviating from the material sucking cavity 1, of the pump shell 3, and in the whole installation process, the rotor 7 is convenient and rapid to install.

After pumping, the stator housing 6 and the medium in the material suction cavity 1 are discharged in advance through the material discharge port 20, the inner housing body 5 is taken out of the pump housing 3, and at the moment, the stator housing 6 is taken out of the inner housing body 5 only by rotating the second housing 52 through the pull block 9, so that the rotor 7 can be quickly disassembled.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a single screw pump, includes pump case (3) and inhales material chamber (1), its characterized in that: an inner bag shell (5) is arranged in the pump shell (3), a stator shell (6) is arranged on the inner wall of the inner bag shell (5), a rotor (7) is rotationally arranged in the stator shell (6), and the material sucking cavity (1) is arranged at one end of the pump shell (3) and is communicated with the inner cavity of the stator shell (6);

the inner bag shell (5) comprises a first shell (51) inserted into the pump shell (3) and a second shell (52) arranged on the first shell (51) in a sliding manner, the first shell (51) and the second shell (52) are arc-shaped shells, a sliding groove (8) for sliding of the second shell (52) is formed in the inner wall of the first shell (51), the inner wall of the first shell (51) and the inner wall of the second shell (52) are located in the same horizontal plane, an inserting block (10) is arranged on the end face, facing away from the sliding groove (8), of the second shell (52), an inserting groove (11) matched with the inserting block (10) is formed in the end face, facing towards the inserting block (10), of the first shell (51), and when the inserting block (10) is in plug-in fit with the inserting groove (11), the inner wall of the first shell (51) and the inner wall of the second shell (52) form a complete circle;

the stator housing (6) comprises a first stator (61) which is inserted and arranged on the inner wall of the first housing (51) and a second stator (62) which is inserted and arranged on the inner wall of the second housing (52), and the first stator (61) and the second stator (62) form the stator housing (6);

a fixed component (15) is arranged on the side wall of the first shell (51) deviating from the suction cavity (1), a mounting hole (17) matched with the fixed component (15) is formed in the pump shell (3), and the first shell (51) is fixedly connected with the pump shell (3) through the fixed component (15);

a discharging hole (20) is formed in the bottom wall of the material sucking cavity (1), and a sealing plug (21) is detachably arranged in the discharging hole (20);

the novel water pump is characterized in that a bump (14) attached to the outer wall of the second shell (52) is arranged on the inner wall of the pump shell (3), a positioning groove (13) is formed in the inner wall of the pump shell (3), and a positioning block (12) matched with the positioning groove (13) is arranged on the outer wall of the first shell (51).

2. A single screw pump according to claim 1, wherein: one end of the pump shell (3) deviating from the material sucking cavity (1) is provided with a discharging cavity (22), and the discharging cavity (22) is communicated with the inner cavity of the stator shell (6).

3. A single screw pump according to claim 1, wherein: one side of inhaling material chamber (1) deviating from pump case (3) is provided with the drive rotor (7) pivoted drive assembly (4), drive assembly (4) are including setting up inhale material chamber (1) deviating from bearing seal (41) of pump case (3) one side, cover establish transmission seat (42) outside bearing seal (41), rotate pump shaft (43) and setting up between rotor (7) and pump shaft (43) in transmission seat (42) drive part (44), pump shaft (43) are fixed with the outside drive source, rotor (7) are in drive part (44) drive down with pump shaft (43) rotate.

4. A single screw pump according to claim 3, wherein: a plurality of supports (23) are arranged on the bottom side wall of the transmission seat (42).

5. A single screw pump according to claim 1, wherein: and the inner walls of the first stator (61) and the second stator (62) are respectively provided with a Teflon coating (19).