CN108180140B - Full-sealed double-screw pump - Google Patents
Full-sealed double-screw pump Download PDFInfo
- Publication number
- CN108180140B CN108180140B CN201711381508.0A CN201711381508A CN108180140B CN 108180140 B CN108180140 B CN 108180140B CN 201711381508 A CN201711381508 A CN 201711381508A CN 108180140 B CN108180140 B CN 108180140B
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- Prior art keywords
- arc
- transmission shaft
- liquid
- ring seat
- output transmission
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- 230000005540 biological transmission Effects 0.000 claims abstract description 96
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 230000003068 static effect Effects 0.000 claims abstract description 32
- 230000009347 mechanical transmission Effects 0.000 claims abstract description 12
- 230000001050 lubricating effect Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 18
- 239000012535 impurity Substances 0.000 claims description 13
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 12
- 239000000788 chromium alloy Substances 0.000 claims description 12
- 229910052726 zirconium Inorganic materials 0.000 claims description 12
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 11
- 230000002441 reversible effect Effects 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 102100025012 Dipeptidyl peptidase 4 Human genes 0.000 description 2
- 101000908391 Homo sapiens Dipeptidyl peptidase 4 Proteins 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
- F04C11/003—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle having complementary function
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
Abstract
The invention discloses a full-sealed double-screw pump, which comprises a transmission shell, a liquid inlet, a liquid outlet, a movable ring seat, a baffle ring, a baffle gap, a static ring seat, a gap groove, a friction ring, a movable ring, rotation-preventing pins, a static ring, a positioning pin and a lubricating gap, wherein a mechanical transmission case and a liquid transmission case are arranged in the transmission shell, one ends of a first output transmission shaft and a second output transmission shaft in the mechanical transmission case extend into the liquid transmission case, one ends of the first output transmission shaft and the second output transmission shaft are respectively provided with a positive spiral blade and a negative spiral blade in a staggered manner, and a wear-resisting layer is arranged between the positive spiral blade and the negative spiral blade and the inner side wall of the liquid transmission case; the invention has simple structure, reasonable and reliable structural design and can be widely popularized and applied.
Description
Technical Field
The invention relates to the technical field of screw pumps, in particular to the technical field of sealing devices of screw pumps.
Background
In the traditional sealing device, a static sealing device and a moving sealing device are arranged, the static sealing is easy to solve, but the moving sealing has a plurality of problems, particularly on some pump bodies, because of the movement between the transmission device and the liquid conveying part, the moving sealing is needed to be adopted for sealing between the two cavities, the general sealing can bring impurity particles in the liquid conveying cavity into the transmission device through a sealed gap to pollute lubricating oil in the transmission device, and meanwhile, the abrasion of mechanical parts is processed, the service life of equipment is shortened, and the moving sealing is needed to be improved and designed to avoid the problems; in the double-screw rotating process, the screw blade is poor in linear sealing and easy to wear in the conventional screw blade in the meshing rotating process, and the screw blade is necessary to be researched and designed.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a full-sealed double-screw pump which can avoid unbalanced force in the liquid conveying process, and meanwhile, can avoid impurities in a liquid conveying cavity from entering a mechanical cavity, ensure the cleaning of lubricating oil in the mechanical cavity and reduce the abrasion of mechanical parts.
In order to achieve the above purpose, the invention provides a totally-enclosed double-screw pump, which comprises a transmission casing, a liquid inlet, a liquid outlet, a movable ring seat, a baffle ring, a baffle gap, a static ring seat, a gap groove, a friction ring, a movable ring, an anti-rotation pin, a static ring, a positioning pin and a lubrication gap, wherein a mechanical transmission box and a liquid transmission box are arranged in the transmission casing, one ends of a first output transmission shaft and a second output transmission shaft in the mechanical transmission box extend into the liquid transmission box, one ends of the first output transmission shaft and the second output transmission shaft are respectively provided with a positive spiral blade and a negative spiral blade in a staggered manner, and a wear-resisting layer is arranged between the positive spiral blade and the negative spiral blade and the inner side wall of the liquid transmission box;
the mechanical transmission case is separated from the liquid transmission case through a sealing device, a movable ring seat of the sealing device is arranged on a first output transmission shaft and a second output transmission shaft, dustproof threads are arranged on the outer circular surface of one end of the movable ring seat, a movable ring is arranged at one end of the inner side of the movable ring seat, a static ring seat is arranged at the lower side of a baffle ring, a friction ring is arranged in a groove of the static ring seat, one side of the baffle ring, which is in contact with the upper side of the static ring seat, is in contact with the front side wall of the static ring seat and one side of the friction ring, a gap is reserved between the lower end of the baffle ring and the dustproof threads, a static ring is arranged at the lower side of the static ring seat, positioning is carried out between the static ring seat and the static ring through a positioning pin, a lubricating gap is reserved between the lower sides of the movable ring and the static ring and the transmission shaft, and the lubricating gap is communicated with an oil cavity.
Preferably, the positive helical blade on the first output transmission shaft is engaged with the negative helical blade on the second output transmission shaft, and the positive helical blade on the second output transmission shaft is engaged with the negative helical blade on the first output transmission shaft.
Preferably, the positive spiral blade is provided with an arc AB, an involute BC, a transitional arc CD, a cycloid DE, an arc EF, an arc FG and an arc HA, and the negative spiral blade is provided with an arc A 'B', an involute B 'C', a transitional arc C 'D', a cycloid D 'E', an arc E 'F', an arc F 'G' and an arc H 'A'; the arc AB is conjugated with the arc E 'F', the involute BC is conjugated with the cycloid D 'E', the transitional arc CD is a transitional arc of the involute BC and the cycloid DE, the lengths of the transitional arc CD and the arc AB are 1-3mm, the cycloid DE is conjugated with the involute B 'C', the arc EF is conjugated with the arc A 'B', the arc FG is conjugated with the arc H 'A', the transitional arc C 'D' is a transitional arc of the involute B 'C' and the cycloid D 'E', the length of the transitional arc C 'D' is 1-3mm, and the length of the arc A 'B' is also 1-3mm.
Preferably, zirconium-based chromium alloy wear-resistant layers are arranged on the outer sides of the positive spiral blade and the negative spiral blade, and the zirconium-based chromium alloy wear-resistant layers comprise the following chemical components: the Zr content is 32.3-32.8%; cr content is 6.1-6.3% and Ti content is 2.2-2.6%; w content is 2.3-2.7%; al content of 0.84-0.88%, nb content of 2.8-3.2%, C content of 1.5-1.9%; the Mo content is 1.3-1.9%, the balance is Fe and impurities, and the weight percentage of the impurities is as follows: si is less than 0.22%, S is less than 0.011%, P is less than 0.05%, and the Rockwell hardness of the zirconium based chromium alloy wear layer is HRC75.
Preferably, anti-rotation pins are arranged in the gaps in the movable ring seat and the movable ring; the rotation direction of the dustproof thread is opposite to the rotation direction of the transmission shaft inside the movable ring seat.
Preferably, the side wall of the liquid transmission case is provided with liquid inlets and liquid outlets, the number of the liquid inlets is 2, and the liquid inlets are respectively positioned at two sides of the liquid outlets.
The invention has the beneficial effects that: according to the invention, the positive spiral blades and the reverse spiral blades are respectively arranged at one ends of the first output transmission shaft and the second output transmission shaft in a staggered manner, the positive spiral blades on the first output transmission shaft are mutually matched with the reverse spiral blades on the second output transmission shaft, and the positive spiral blades on the second output transmission shaft are mutually matched with the reverse spiral blades on the first output transmission shaft, so that good balance force can be effectively ensured to be kept when the first output transmission shaft and the second output transmission shaft are in transmission, and the abrasion of parts caused by unbalance is eliminated; the outer circular surface of one end of the movable ring seat is provided with a dustproof thread, the notch of the static ring seat is provided with a friction ring, the friction ring is contacted with the dustproof thread, the rotation direction of the dustproof thread is opposite to the rotation direction of the transmission shaft inside the movable ring seat, impurities in liquid can be placed into the oil cavity through a gap generated in the movement process, and rapid abrasion of parts is prevented; the positive helical blade and the negative helical blade are provided with the zirconium-based chromium alloy wear-resistant layers, so that the wear resistance of the positive helical blade and the negative helical blade is greatly improved, and the service life of equipment is prolonged; the invention has simple structure, reasonable and reliable structural design and can be widely popularized and applied.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic cross-sectional front view of a fully enclosed twin screw pump of the present invention;
FIG. 2 is an enlarged partial schematic view in front cross section of a fully enclosed twin screw pump of the present invention;
FIG. 3 is a schematic cross-sectional profile of a positive and negative helical vane of a fully sealed twin screw pump of the present invention;
FIG. 4 is a schematic axial section view of a fully sealed twin screw pump of the present invention with positive and negative helical vanes engaged.
In the figure: 1-transmission case, 2-mechanical transmission case, 3-liquid transmission case, 4-first output transmission shaft, 5-second output transmission shaft, 6-positive helical blade, 7-negative helical blade, 8-liquid inlet, 9-liquid outlet, 10-wear-resistant layer, 11-moving ring seat, 12-dustproof screw thread, 13-baffle ring, 14-baffle notch, 15-static ring seat, 16-notch groove, 17-friction ring, 18-moving ring, 19-rotation-preventing pin, 20-static ring, 21-locating pin, 22-lubrication gap, 23-oil cavity, 24-arc AB, 25-involute BC, 26-transitional arc CD, 27-cycloid DE, 28-arc EF, 29-arc, 30-arc HA, FG-arc A 'B', 32-involute B 'C', 33-transitional arc C 'D', 34-cycloid D 'E', 35-arc E 'F', 36-F 'G', 37-H 'A', 38-zirconium-based chromium alloy layer.
Detailed Description
Referring to fig. 1-4, the fully sealed double-screw pump comprises a transmission casing 1, a liquid inlet 8, a liquid outlet 9, a movable ring seat 11, a baffle ring 13, a baffle gap 14, a static ring seat 15, a gap 16, a friction ring 17, a movable ring 18, an anti-rotation pin 19, a static ring 20, a positioning pin 21 and a lubrication gap 22, wherein a mechanical transmission case 2 and a liquid transmission case 3 are arranged in the transmission casing 1, one ends of a first output transmission shaft 4 and a second output transmission shaft 5 in the mechanical transmission case 2 extend into the liquid transmission case 3, one ends of the first output transmission shaft 4 and the second output transmission shaft 5 are respectively provided with a positive screw blade 6 and a negative screw blade 7 in a staggered manner, and a wear-resisting layer 10 is arranged between the positive screw blade 6 and the negative screw blade 7 and the inner side wall of the liquid transmission case 3; the mechanical transmission case 2 and the liquid transmission case 3 are separated by a sealing device, a movable ring seat 11 of the sealing device is arranged on a first output transmission shaft 4 and a second output transmission shaft 5, a dustproof thread 12 is arranged on the outer circular surface of one end of the movable ring seat 11, a movable ring 18 is arranged on one end of the inner side of the movable ring seat 11, a stationary ring seat 15 is arranged on the lower side of a baffle ring 13, a friction ring 17 is arranged on a notch 16 of the stationary ring seat 15, one side of the baffle ring 13 is contacted with the upper side of the stationary ring seat 15, the other side of the baffle ring 14 is contacted with the front side wall of the stationary ring seat 15 and one side of the friction ring 17, a gap is reserved between the lower end of the baffle ring 13 and the dustproof thread 12, a stationary ring 20 is arranged on the lower side of the stationary ring seat 15 and the stationary ring 20, a lubricating gap 22 is reserved between the lower sides of the movable ring 18 and the stationary ring 20 and the transmission shafts, and the lubricating gap 22 is communicated with an oil cavity 23; the positive helical blades 6 on the first output transmission shaft 4 are mutually matched with the negative helical blades 7 on the second output transmission shaft 5; the positive spiral blade 6 is provided with an arc AB24, an involute BC25, a transitional arc CD26, a cycloid DE27, an arc EF28, an arc FG29 and an arc HA30, and the negative spiral blade 7 is provided with an arc A 'B'31, an involute B 'C'32, a transitional arc C 'D'33, a cycloid D 'E'34, an arc E 'F'35, an arc F 'G'36 and an arc H 'A'37; the arc AB24 is conjugated with the arc E 'F'35, the involute BC25 is conjugated with the cycloid D 'E'34, the transitional arc CD26 is a transitional arc of the involute BC25 and the cycloid DE27, the lengths of the transitional arc CD and the arc AB24 are 1-3mm, the cycloid DE27 is conjugated with the involute B 'C'32, the arc EF28 is conjugated with the arc A 'B'31, the arc FG29 is conjugated with the arc H 'A'37, the transitional arc C 'D'33 is a transitional arc of the involute B 'C'32 and the cycloid D 'E'34, the length of the transitional arc C 'D' is 1-3mm, and the length of the arc A 'B'31 is also 1-3mm; the outer sides of the positive spiral blade 6 and the negative spiral blade 7 are provided with a zirconium-based chromium alloy wear-resistant layer 38, and the zirconium-based chromium alloy wear-resistant layer 38 comprises the following chemical components: the Zr content is 32.3-32.8%; cr content is 6.1-6.3% and Ti content is 2.2-2.6%; w content is 2.3-2.7%; al content of 0.84-0.88%, nb content of 2.8-3.2%, C content of 1.5-1.9%; the Mo content is 1.3-1.9%, the balance is Fe and impurities, and the weight percentage of the impurities is as follows: si is less than 0.22%, S is less than 0.011%, P is less than 0.05%, and the zirconium based chromium alloy wear layer 38 Rockwell hardness HRC75; the positive helical blades 6 on the second output transmission shaft 5 are mutually matched with the negative helical blades 7 on the first output transmission shaft 4; anti-rotation pins 19 are arranged in gaps in the movable ring seat 11 and the movable ring 18; the rotation direction of the dustproof thread 12 is opposite to the rotation direction of the transmission shaft in the movable ring seat 11; the side wall of the liquid transmission case 3 is provided with liquid inlets 8 and liquid outlets 9, the number of the liquid inlets 8 is 2, and the liquid inlets 8 are respectively positioned at two sides of the liquid outlets 9.
The working process of the invention comprises the following steps:
in the working process of the fully-sealed double-screw pump, a water inlet pipe is connected with a liquid inlet 8, a water outlet pipe is connected with a liquid outlet 9, a pump body is connected with a power supply, the pump body is started, a first output transmission shaft 4 and a second output transmission shaft 5 rotate, so that liquid enters a positive screw blade 6 and a negative screw blade 7 through the liquid inlet 8 and is discharged through the liquid outlet 9, liquid is conveyed, impurities in the liquid can enter a gap between the lower end of a baffle ring and dustproof threads in the liquid conveying process, a movable ring seat 11 rotates to enable the dustproof threads 12 to rotate, the impurities are rotated back into a liquid transmission box 3, and the impurities are effectively prevented from entering a mechanical transmission box 2 through the gap between a friction ring 17 and the dustproof threads 12; lubrication gaps 22 are reserved between the lower sides of the movable ring 18 and the static ring 20 and the transmission shaft, the lubrication gaps 22 are communicated with oil cavities 23, and the lubrication oil lubricates the contact surfaces of the movable ring 18 and the static ring 20 through the lubrication gaps 22, so that abrasion between the movable ring 18 and the static ring 20 is reduced.
According to the invention, the positive spiral blades 6 and the reverse spiral blades 7 are respectively arranged at one ends of the first output transmission shaft 4 and the second output transmission shaft 5 in a staggered manner, the positive spiral blades 6 on the first output transmission shaft 4 are mutually matched with the reverse spiral blades 7 on the second output transmission shaft 5, and the positive spiral blades 6 on the second output transmission shaft 5 are mutually matched with the reverse spiral blades 7 on the first output transmission shaft 4, so that good balance force can be effectively ensured to be maintained when the first output transmission shaft 4 and the second output transmission shaft 5 are transmitted, and therefore, component abrasion caused by unbalance is eliminated; the outer circular surface of one end of the movable ring seat 11 is provided with the dustproof thread 12, the notch 16 of the static ring seat 15 is provided with the friction ring 17, the friction ring 17 is contacted with the dustproof thread 12, the rotation direction of the dustproof thread 12 is opposite to the rotation direction of the transmission shaft inside the movable ring seat 11, impurities in liquid can be prevented from entering the oil cavity 23 through a gap generated in the movement process, and rapid abrasion of parts is prevented; the molded lines of the positive spiral blade 6 and the negative spiral blade 7 are optimally designed, so that the sealing performance is better, the liquid conveying capacity is stronger, and the wear resistance of the positive spiral blade 6 and the negative spiral blade 7 is greatly improved by arranging the zirconium-based chromium alloy wear-resistant layer 38, so that the service life of equipment is prolonged; the invention has simple structure, reasonable and reliable structural design and can be widely popularized and applied.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (1)
1. A totally enclosed twin screw pump, characterized in that: the novel anti-friction type hydraulic oil cylinder comprises a transmission casing (1), a liquid inlet (8), a liquid outlet (9), a movable ring seat (11), a baffle ring (13), a baffle gap (14), a static ring seat (15), a gap groove (16), a friction ring (17), a movable ring (18), an anti-rotation pin (19), a static ring (20), a positioning pin (21) and a lubricating gap (22), wherein a mechanical transmission case (2) and a liquid transmission case (3) are arranged in the transmission casing (1), one ends of a first output transmission shaft (4) and a second output transmission shaft (5) in the mechanical transmission case (2) extend into the liquid transmission case (3), one ends of the first output transmission shaft (4) and the second output transmission shaft (5) are respectively provided with a positive spiral blade (6) and a reverse spiral blade (7) in a staggered mode, and a wear-resistant layer (10) is arranged between the positive spiral blade (6) and the reverse spiral blade (7) and the inner side wall of the liquid transmission case (3); the mechanical transmission case (2) and the liquid transmission case (3) are separated by a sealing device, a movable ring seat (11) of the sealing device is arranged on a first output transmission shaft (4) and a second output transmission shaft (5), a dustproof thread (12) is arranged on the outer circular surface of one end of the movable ring seat (11), a movable ring (18) is arranged on one end of the inner side of the movable ring seat (11), a static ring seat (15) is arranged on the lower side of a baffle ring (13), a friction ring (17) is arranged on a notch groove (16) of the static ring seat (15), one side of a baffle gap (14) of the baffle ring (13) is contacted with the upper side of the static ring seat (15), the other side of the baffle gap (14) is contacted with the front side wall of the static ring seat (15) and one side of the friction ring (17), a gap is reserved between the lower end of the baffle ring (13) and the dustproof thread (12), a static ring (20) is arranged on the lower side of the static ring seat (15), the static ring seat (15) is positioned by a positioning pin (21), and a gap (22) is reserved between the static ring seat (18) and the lower side of the movable ring (20) and the transmission shaft (20) and the lubricating cavity (22); the positive helical blades (6) on the first output transmission shaft (4) are mutually matched with the negative helical blades (7) on the second output transmission shaft (5), and the positive helical blades (6) on the second output transmission shaft (5) are mutually matched with the negative helical blades (7) on the first output transmission shaft (4); the positive spiral blade (6) is provided with an arc AB (24), an involute BC (25), a transitional arc CD (26), a cycloid DE (27), an arc EF (28), an arc FG (29) and an arc HA (30), and the negative spiral blade (7) is provided with an arc A 'B' (31), an involute B 'C' (32), a transitional arc C 'D' (33), a cycloid D 'E' (34), an arc E 'F' (35), an arc F 'G' (36) and an arc H 'A' (37); the arc AB (24) is conjugated with the arc E 'F' (35), the involute BC (25) is conjugated with the cycloid D 'E' (34), the transitional arc CD (26) is a transitional arc of the involute BC (25) and the cycloid DE (27), the transitional arc CD and the arc AB (24) are 1-3mm in length, the cycloid DE (27) is conjugated with the involute B 'C' (32), the arc EF (28) is conjugated with the involute A 'B' (31), the arc FG (29) is conjugated with the arc H 'A' (37), the transitional arc C 'D' (33) is a transitional arc of the involute B 'C' (32) and the cycloid D 'E' (34), the transitional arc C 'D' is 1-3mm in length, and the arc A 'B' (31) is also 1-3mm in length. The outer sides of the positive spiral blade (6) and the reverse spiral blade (7) are provided with a zirconium-based chromium alloy wear-resistant layer (38), and the zirconium-based chromium alloy wear-resistant layer (38) comprises the following chemical components: the Zr content is 32.3-32.8%; cr content is 6.1-6.3% and Ti content is 2.2-2.6%; w content is 2.3-2.7%; al content of 0.84-0.88%, nb content of 2.8-3.2%, C content of 1.5-1.9%; the Mo content is 1.3-1.9%, the balance is Fe and impurities, and the weight percentage of the impurities is as follows: si less than 0.22%, S less than 0.011%, P less than 0.05%, said zirconium based chromium alloy wear layer (38) having a Rockwell hardness HRC75; anti-rotation pins (19) are arranged in gaps inside the movable ring seat (11) and the movable ring (18); the rotation direction of the dustproof thread (12) is opposite to the rotation direction of the transmission shaft in the movable ring seat (11); the side wall of the liquid transmission case (3) is provided with a liquid inlet (8) and a liquid outlet (9), the number of the liquid inlets (8) is 2, and the liquid inlets are respectively positioned at two sides of the liquid outlet (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711381508.0A CN108180140B (en) | 2017-12-20 | 2017-12-20 | Full-sealed double-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711381508.0A CN108180140B (en) | 2017-12-20 | 2017-12-20 | Full-sealed double-screw pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108180140A CN108180140A (en) | 2018-06-19 |
| CN108180140B true CN108180140B (en) | 2023-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711381508.0A Active CN108180140B (en) | 2017-12-20 | 2017-12-20 | Full-sealed double-screw pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN108180140B (en) |
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| CN204783807U (en) * | 2015-07-02 | 2015-11-18 | 鸿浩泵业有限公司 | Modified bi -polar face collection dress formula mechanical seal |
| CN106015080A (en) * | 2016-07-25 | 2016-10-12 | 浙江工业大学 | Anti-abrasion seal device for submersible sewage pump |
| CN207583622U (en) * | 2017-12-20 | 2018-07-06 | 杭州电子科技大学 | A kind of full seal type Quimby pump and high-pressure balancing rotor |
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2017
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545588A (en) * | 1983-07-08 | 1985-10-08 | Tanken Seiko Corp. | Mechanical face seal for sealing slurry liquid |
| CN2177823Y (en) * | 1993-10-08 | 1994-09-21 | 重庆新世纪电气有限公司 | Single screw stem pump |
| CN101963153A (en) * | 2009-07-22 | 2011-02-02 | 株式会社丰田自动织机 | Screw rotor |
| CN103388580A (en) * | 2013-08-02 | 2013-11-13 | 浙江大学 | Split type mechanical seal and double-screw pump with same |
| CN104005954A (en) * | 2014-06-20 | 2014-08-27 | 淄博景曜真空设备有限公司 | Vertical type Roots dry vacuum pump |
| CN204783807U (en) * | 2015-07-02 | 2015-11-18 | 鸿浩泵业有限公司 | Modified bi -polar face collection dress formula mechanical seal |
| CN106015080A (en) * | 2016-07-25 | 2016-10-12 | 浙江工业大学 | Anti-abrasion seal device for submersible sewage pump |
| CN207583622U (en) * | 2017-12-20 | 2018-07-06 | 杭州电子科技大学 | A kind of full seal type Quimby pump and high-pressure balancing rotor |
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| CN108180140A (en) | 2018-06-19 |
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