CN210386216U - Horizontal screw centrifugal machine - Google Patents
Horizontal screw centrifugal machine Download PDFInfo
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- CN210386216U CN210386216U CN201920666203.2U CN201920666203U CN210386216U CN 210386216 U CN210386216 U CN 210386216U CN 201920666203 U CN201920666203 U CN 201920666203U CN 210386216 U CN210386216 U CN 210386216U
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- 239000000463 material Substances 0.000 claims abstract description 79
- 239000002893 slag Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007790 solid phase Substances 0.000 claims description 5
- 239000000706 filtrate Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- UJCHIZDEQZMODR-BYPYZUCNSA-N (2r)-2-acetamido-3-sulfanylpropanamide Chemical compound CC(=O)N[C@@H](CS)C(N)=O UJCHIZDEQZMODR-BYPYZUCNSA-N 0.000 claims description 3
- 241001669680 Dormitator maculatus Species 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 25
- 230000007246 mechanism Effects 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 description 15
- 230000001133 acceleration Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The horizontal screw centrifuge comprises a material distribution chamber, a feeding pipe, a screw conveying shaft, a rotary drum, a screw blade, a housing, a differential mechanism, a front main bearing, a screw front bearing, a screw rear bearing and a rear main bearing; the material distribution chamber is fixedly arranged in the hollow shaft of the screw conveyor and rotates along with the screw conveying shaft; the material distribution chamber comprises a first conical cavity, a first-stage blade, a second conical cavity and a second-stage blade; the small end surface of the first conical cavity is of a convex round structure, and the convex round surface of the small end surface of the first conical cavity faces the outlet of the feeding pipe; the first-stage blades are uniformly welded on the conical surface of the first conical cavity in the circumferential direction; the large end face of the second conical cavity is opposite to the large end face of the first conical cavity, and a feeding pipe penetrates through the center of the small end face of the second conical cavity; the second-stage blades are uniformly welded between the large end face of the first conical cavity and the large end face of the second conical cavity in the circumferential direction; the central shafts of the first conical cavity, the first stage blade, the second conical cavity, the second stage blade and the feeding pipe are coincided. The utility model provides high separation efficiency.
Description
Technical Field
The utility model relates to a spiral shell centrifuge crouches.
Background
In consideration of the special characteristics of axial feeding and a double-rotor structure, the horizontal screw centrifuge needs to be provided with a material distribution chamber in the inner cavity of the spiral conveying shaft as a transition region between a material feeding pipe and a drum separation chamber. The most part of the material distribution chamber of the horizontal screw centrifuge on the market is a simple cylindrical cavity with a discharge hole, the process that materials to be separated enter the rotary material distribution chamber from a static feed pipe is mostly concentrated flow or jet flow, the transition of a flow guide device is avoided, the materials are caused to flow disorderly in the material distribution chamber, most of energy required by the acceleration of the materials in the distribution chamber is wasted, the materials can be seriously accumulated on the inner wall surface of the distribution chamber, the blockage of the discharge hole is caused, and the normal operation of the horizontal screw centrifuge equipment is damaged. On the other hand, the material gets into the in-process of rotary drum separation chamber through the discharge gate, and the radial velocity of material changes greatly, and the circumferential velocity is less than separation liquid pool circumferential direction speed far away, gets into rotary drum entry zone separation liquid pool with lower circumferential velocity when the material, because the influence of speed difference, makes the liquid in the entry zone separation liquid pool take place to slide, the turbulence, leads to light, heavy phase's remixing, has not only consumed the energy and has carried out circumference acceleration to the material, has still reduced centrifuge's separation efficiency. In addition, a certain clearance exists between the static feeding pipe and the rotating spiral conveying shaft, materials can enter the hollow spiral conveying shaft from the material distribution chamber through the dynamic and static clearances in the starting and stopping processes of the horizontal spiral centrifuge, and the dynamic balance of the rotor can be damaged when the materials are deposited in the hollow shaft for a long time. Therefore, in order to avoid concentrated flow or jet of feed material, increase the circumferential velocity of the material, and prevent material from settling in the hollow shaft, improvements in the material dispensing chamber are necessary.
Disclosure of Invention
In order to solve the problem that the feeding circumferential speed of the existing horizontal screw centrifuge is small, the separation liquid pool material separation efficiency is low, the utility model provides an efficient horizontal screw centrifuge.
The above technical problem of the utility model is solved through following technical scheme:
the utility model discloses a horizontal screw centrifuge, including material ration room 1, inlet pipe 2, spiral conveying shaft 3, rotary drum 4, helical blade 7, housing 10, differential 13, front main bearing 14, spiral front bearing 15, spiral rear bearing 16, rear main bearing 17;
a rotary drum 4 is rotatably arranged in the housing 10, a spiral conveying shaft 3 is rotatably arranged in the rotary drum 4, spiral blades 7 are fixed on the spiral conveying shaft 3, and the spiral conveying shaft 3, the rotary drum 4 and the spiral blades 7 are coaxially arranged;
a solid-phase slag discharge port 18 is formed in the left end of the housing 10, and a filtrate discharge port 19 is formed in the right end of the housing 10; the left end of the rotary drum 4 is provided with a slag hole 9, and the right end of the rotary drum 4 is provided with an overflow hole 8; the left end of the inner cavity of the rotary drum 4 is communicated with the left end of the inner cavity of the housing 10 through the slag hole 9, and the right end of the inner cavity of the rotary drum 4 is communicated with the right end of the inner cavity of the housing 10 through the overflow hole 8; the inner cavity of the material distribution chamber 1 is communicated with a cavity between the spiral conveying shaft 3 and the rotary drum 4 through a discharge port 6; the feed pipe 2 is arranged at the left end of the spiral conveying shaft 3, the inlet end of the feed pipe 2 extends out of the housing 10, and the outlet end of the feed pipe 2 is arranged in the material distribution chamber 1;
the right end of the rotary drum 4 is driven by a motor to rotate, the left end of the rotary drum 4 is connected with a differential mechanism 13, an output shaft of the differential mechanism 13 is connected with the spiral conveying shaft 3, and the output shaft of the differential mechanism 13 drives the spiral conveying shaft 3 and the rotary drum 4 to rotate in the same direction at a certain differential speed, so that the spiral blades 7 can discharge the sediments in the rotary drum 4 from the slag outlet hole 9;
the material distribution chamber is fixedly arranged in the hollow shaft of the screw conveyor and rotates along with the screw conveying shaft. The material distribution chamber 1 comprises a first conical cavity 11, a first-stage blade A, a second conical cavity 12 and a second-stage blade B;
the first conical cavity 11 is in a boss shape, the small end face of the first conical cavity 11 is of a convex round structure, and the convex round 11a of the small end face of the first conical cavity 11 faces the outlet of the feeding pipe 2; the first-stage blades A are uniformly welded on the conical surface of the first conical cavity 11 in the circumferential direction, the inlet edge of the first-stage blades A is flush with the outlet plane of the feeding pipe 2, and the outlet edge of the first-stage blades A is flush with the large end surface of the first conical cavity 11; the second conical cavity 12 is in a boss shape, the large end face of the second conical cavity 12 is opposite to the large end face of the first conical cavity 11, and a feeding pipe 2 penetrates through the center of the small end face of the second conical cavity 12; the second-stage blades B are uniformly welded between the large end face of the first conical cavity 11 and the large end face of the second conical cavity 12 in the circumferential direction; the central axes of the first conical cavity 11, the first-stage blade A, the second conical cavity 12, the second-stage blade B and the feeding pipe 2 are coincident;
a first flow passage is formed between the first-stage blades A, a second flow passage is formed between the second-stage blades B, the first flow passage is communicated with the outlet of the feeding pipe 2 and the second flow passage, and the second flow passage is communicated with the inner cavity of the material distribution chamber 1 and the inner cavity between the spiral conveying shaft 3 and the rotary drum 4;
a baffle ring 12a is arranged on the side of the second conical cavity 12 close to the small end surface, the plane where the baffle ring 12a is located is perpendicular to the central axis of the feed pipe 2, the large-diameter end of the baffle ring 12a is fixed on the conical surface of the second conical cavity 12, and the small-diameter end of the baffle ring 12a is not in contact with the feed pipe 2; and an annular sealing ring 2a is arranged on the feeding pipe 2 between the baffle ring 12a and the small end surface of the second conical cavity 12.
Preferably, the inclination angle η of the conical surface of the first conical cavity 11 is 20-35 degrees, the wall thickness of the first conical cavity 11 is 4mm, and the radius R of the large end surface of the first conical cavity 11275 mm-85 mm; the distance between the big end surface and the small end surface of the first conical cavity 11 is L3110 mm; the radius R of the convex circle 11a of the small end surface of the first conical cavity1Is 25 mm; the convex round surface and the conical surface are rounded, and the radius of the rounding is 10 mm; the distance L from the convex circle 11a to the outlet of the feeding pipe 24Is 30 mm.
Preferably, the inclination angle Ω of the conical surface of the second conical cavity 12 is 30-50 °; the wall thickness of the second conical cavity 12 is 4 mm; the large end face radius of the second conical cavity 12 and the large end face radius R of the first conical cavity 112Equal; the distance between the big end surface and the small end surface of the second conical cavity 12 is L190 mm; the thickness of the baffle ring 12a on the conical surface of the second conical cavity 12 is 2mm, and the distance from the baffle ring 12a to the small end surface of the second conical cavity 12 is 4 mm; annular seal 2a thickness is 2mm on inlet pipe 2, just annular seal 2a arrives keep off ring 12a distance is 1 mm.
Preferably, the first-stage blades consist of 5-7 blades, the first-stage blades A are single arc thin blades with equal thickness, the thickness of the first-stage blades A is 2mm, the installation angle α of the first-stage blades A is 30 degrees, the first-stage blades A are welded along the direction of the conical surface generatrix of the first conical cavity 11, the cross sections of the first-stage blades A are arc-shaped, and the radius R of the arc is the same as that of the first-stage blades A320mm, and a circular arc central angle β of 70, as shown in fig. 7, the inlet edge a of the first stage blade a1At and outlet edge A2The radius is 8 mm.
Preferably, the second-stage blade B consists of 9-11 blades; the section of the second-stage blade B is NACA9415 in NACA; the placing angle gamma of the second-stage blade B inlet is 40-60 degrees; the chord length x of the second-stage blade B is 70 mm; the second stage blade B has a height L2Equal to the distance between the large end faces of the first and second tapered cavities, L250 mm; the distance between the inlet edge of the second stage blade B and the rotating central shaft of the second stage blade B and the large end surface radius R of the first conical cavity 11 and the second conical cavity 122Are equal.
The utility model discloses a theory of operation is:
(1) install additional after the type material ration room 1 is accelerated to circumference, the first toper chamber 11 quilt of material ration room first order blade A divides into a plurality of runners, treats that separation material gets into material ration room 1 back from inlet pipe 2, at first quilt protruding circle 11a breaks away and evenly gets into on the first toper chamber fag end first order blade entry, first toper chamber 11 and first order blade A are in it is rotatory to produce under the drive of auger delivery axle 3, treats that separation material plays the effect of reposition of redundant personnel water conservancy diversion, has reduced mobile energy loss, has improved the continuity of flow.
(2) After the material is divided and guided by the first-stage blade A, the material to be separated enters the second-stage blade B from the outlet direction of the first-stage blade, and the circumferential speed of the material is improved due to the larger steering angle and the longer flow channel of the second-stage blade; the multiple flow channels formed by the second-stage blades B ensure the dispersibility of the materials to be separated when entering the inner cavity of the rotary drum 4, and reduce the disturbance of the materials to be separated on the separation liquid pool of the separation area E at the inlet of the inner cavity of the rotary drum; because the material to be separated is subjected to a circumferential acceleration action before entering the separation liquid pool 5, the circumferential speed of the material to be separated is increased, the circumferential speed difference with the liquid level of the separation liquid pool 5 is reduced, the energy of the material for accelerating in the separation liquid pool is saved, the phenomena of liquid slippage and turbulence in the separation E liquid pool of the inlet area are reduced, the separation of light and heavy phases is facilitated, and the separation efficiency of the horizontal decanter centrifuge is improved.
(3) Under the working condition of increasing the feeding amount, if the feeding amount is too large, a small amount of materials cannot be discharged out of the material separation chamber 1 in time, and are rushed onto the conical surface of the second conical cavity 12 of the material separation chamber under the action of inertia, and due to the limitation of the conical surface of the second conical cavity 12, the small amount of materials finally flow into a flow channel formed by the second-stage blades B under the action of centrifugal force and are thrown out of the material distribution chamber 1 along with the main flow; the second conical cavity 12 acts as a buffer for the material to be separated.
(4) The second conical cavity is close to the small end face side and is equipped with and keeps off ring 12a, be equipped with ring packing 2a on the inlet pipe, keep off ring 12a with ring packing 2a can prevent that the indoor material of waiting to separate of material ration from getting into hollow auger delivery axle 3 through the sound clearance of inlet pipe and material ration room under horizontal spiral shell centrifuge operating mode and non-operating mode circumstances, prevents that the material from depositing in the hollow shaft, destroying rotor dynamic balance.
The utility model has the advantages that: the energy loss of the material flowing in the material distribution chamber is reduced, the circumferential speed of the material at the discharge port is improved, the phenomena of slippage and turbulence of liquid in a separation liquid pool at an inlet area are reduced, and the separation efficiency of the horizontal screw centrifuge is improved; prevent the material from depositing in the hollow shaft and damaging the dynamic balance of the rotor.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of a decanter centrifuge;
FIG. 2 is a front view of a circumferentially accelerating material distribution chamber for a horizontal decanter centrifuge, according to one embodiment;
FIG. 3 is an axial cross-sectional view of a circumferentially accelerating material distribution chamber for a horizontal decanter centrifuge, according to one embodiment;
FIG. 4 is a schematic illustration of a sizing system for a peripheral acceleration type material distribution chamber of a horizontal decanter centrifuge, according to one embodiment;
FIG. 5 is a cross-sectional view taken in the direction P1-P1 of FIG. 2;
FIG. 6 is a cross-sectional view taken in the direction P2-P2 of FIG. 2;
FIG. 7 is a schematic view of blade A;
FIG. 8 is a schematic view of a blade A blade section;
FIG. 9 is a schematic view of blade B
Description of reference numerals: 1-material distribution chamber, 2-feeding pipe, 2 a-annular sealing ring, 3-spiral conveying shaft, 4-rotary drum, 5-separation liquid pool, 6-discharging port, 7-spiral blade, 8-overflow hole, 9-slag hole, 10-encloser, 11-first conical cavity, 11 a-convex circle, 11 b-inverted circle, 12-second conical cavity, 12 a-baffle ring, 13-differential mechanism, 14-front main bearing, 15-spiral front bearing, 16-spiral rear bearing, 17-rear main bearing, 18-solid phase slag discharge port, 19-filtrate discharge port, A-first stage blade, A-differential mechanism, 14-front main bearing, 15-spiral front bearing, 16-spiral rear bearing, 17-rear main bearing, 18-solid phase slag1、A2Radius, B-second stage blade, E-inlet separation zone, L1Distance between the large and small end faces of the second conical cavity, L2Second stage blade height, L3Distance between the large and small end faces of the first conical cavity, L4Distance of the bead from the outlet of the feed pipe, R1Radius of convex circle, R2Large end radii of the first and second conical cavities, R3Blade A blade section arc radius, x-blade B chord length, η -first conical cavity taper angle, omega-second conical cavity taper angle, α -first stage blade installation angle, β -blade A blade sectionThe arc central angle and the gamma-second-stage blade inlet arrangement angle.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to figures 1 to 9:
the utility model discloses a horizontal screw centrifuge, including material ration room 1, inlet pipe 2, spiral conveying shaft 3, rotary drum 4, helical blade 7, housing 10, differential 13, front main bearing 14, spiral front bearing 15, spiral rear bearing 16, rear main bearing 17;
a rotary drum 4 is rotatably arranged in the housing 10, a spiral conveying shaft 3 is rotatably arranged in the rotary drum 4, spiral blades 7 are fixed on the spiral conveying shaft 3, and the spiral conveying shaft 3, the rotary drum 4 and the spiral blades 7 are coaxially arranged;
a solid-phase slag discharge port 18 is formed in the left end of the housing 10, and a filtrate discharge port 19 is formed in the right end of the housing 10; the left end of the rotary drum 4 is provided with a slag hole 9, and the right end of the rotary drum 4 is provided with an overflow hole 8; the left end of the inner cavity of the rotary drum 4 is communicated with the left end of the inner cavity of the housing 10 through the slag hole 9, and the right end of the inner cavity of the rotary drum 4 is communicated with the right end of the inner cavity of the housing 10 through the overflow hole 8; the inner cavity of the material distribution chamber 1 is communicated with a cavity between the spiral conveying shaft 3 and the rotary drum 4 through a discharge port 6; the feed pipe 2 is arranged at the left end of the spiral conveying shaft 3, the inlet end of the feed pipe 2 extends out of the housing 10, and the outlet end of the feed pipe 2 is arranged in the material distribution chamber 1;
the right end of the rotary drum 4 is driven by a motor to rotate, the left end of the rotary drum 4 is connected with a differential mechanism 13, an output shaft of the differential mechanism 13 is connected with the spiral conveying shaft 3, and the output shaft of the differential mechanism 13 drives the spiral conveying shaft 3 and the rotary drum 4 to rotate in the same direction at a certain differential speed, so that the spiral blades 7 can discharge the sediments in the rotary drum 4 from the slag outlet hole 9;
the material distribution chamber is fixedly arranged in the hollow shaft of the screw conveyor and rotates along with the screw conveying shaft. The material distribution chamber 1 comprises a first conical cavity 11, a first-stage blade A, a second conical cavity 12 and a second-stage blade B;
the first conical cavity 11 is in a boss shape, the small end face of the first conical cavity 11 is of a convex round structure, and the convex round 11a of the small end face of the first conical cavity 11 faces the outlet of the feeding pipe 2; the first-stage blades A are uniformly welded on the conical surface of the first conical cavity 11 in the circumferential direction, the inlet edge of the first-stage blades A is flush with the outlet plane of the feeding pipe 2, and the outlet edge of the first-stage blades A is flush with the large end surface of the first conical cavity 11; the second conical cavity 12 is in a boss shape, the large end face of the second conical cavity 12 is opposite to the large end face of the first conical cavity 11, and a feeding pipe 2 penetrates through the center of the small end face of the second conical cavity 12; the second-stage blades B are uniformly welded between the large end face of the first conical cavity 11 and the large end face of the second conical cavity 12 in the circumferential direction; the central axes of the first conical cavity 11, the first-stage blade A, the second conical cavity 12, the second-stage blade B and the feeding pipe 2 are coincident;
a first flow passage is formed between the first-stage blades A, a second flow passage is formed between the second-stage blades B, the first flow passage is communicated with the outlet of the feeding pipe 2 and the second flow passage, and the second flow passage is communicated with the inner cavity of the material distribution chamber 1 and the inner cavity between the spiral conveying shaft 3 and the rotary drum 4;
a baffle ring 12a is arranged on the side of the second conical cavity 12 close to the small end surface, the plane where the baffle ring 12a is located is perpendicular to the central axis of the feed pipe 2, the large-diameter end of the baffle ring 12a is fixed on the conical surface of the second conical cavity 12, and the small-diameter end of the baffle ring 12a is not in contact with the feed pipe 2; an annular sealing ring 2a is arranged between the baffle ring 12a and the small end face of the second conical cavity 12 on the discharge pipe 2.
As shown in fig. 1, which is a sectional view of a horizontal screw centrifuge in one embodiment, a material distribution chamber 1 is fixedly disposed within a hollow shaft of a screw conveyor 3 and rotates together with the screw conveyor shaft 3.
FIG. 2 is a schematic structural diagram of a circumferential acceleration type material distribution chamber for a horizontal screw centrifuge according to an embodiment;
fig. 3 is a cross-sectional view of fig. 2 in the axial direction, the material distribution chamber 1 comprising a first conical cavity 11, a first stage vane a, a second conical cavity 12 and a second stage vane B; the first conical cavity 11 is in a boss shape, the small end face of the first conical cavity 11 is of a convex circular structure, and the convex circle 11a of the small end face of the first conical cavity 11 faces the outlet of the feeding pipe 2; the first-stage blades A are uniformly welded on the conical surface of the first conical cavity 11 in the circumferential direction, the inlet edge of the first-stage blades A is flush with the outlet plane of the feeding pipe 2, and the outlet edge of the first-stage blades A is flush with the large end surface of the first conical cavity 11; the second conical cavity 12 is in a boss shape, the large end face of the second conical cavity 12 is opposite to the large end face of the first conical cavity 11, and the feeding pipe 2 penetrates through the center of the small end face of the second conical cavity 12; the second-stage blades B are uniformly welded between the large end face of the first conical cavity 11 and the large end face of the second conical cavity 12 in the circumferential direction; the central axes of the first conical cavity 11, the first-stage blade A, the second conical cavity 12, the second-stage blade B and the feeding pipe 2 are superposed;
fig. 5, 6 are sectional views of fig. 2 in the direction P1-P1, P2-P2, fig. 3, 5, 6 illustrating the position of the first stage vanes a and the second stage vanes B within the material distribution chamber 1; a first flow channel is formed between the first-stage blades A, a second flow channel is formed between the second-stage blades B, the first flow channel is communicated with the outlet 2 of the feeding pipe and the second flow channel, and the second flow channel is communicated with the inner cavity of the material distribution chamber 1 and the inner cavity between the spiral conveying shaft 3 and the rotary drum 4;
a baffle ring 12a is arranged on the side of the second conical cavity 12 close to the small end surface, the plane where the baffle ring 12a is located is perpendicular to the central axis of the feeding pipe 2, the large-diameter end of the baffle ring 12a is fixed on the conical surface of the second conical cavity 12, and the small-diameter end of the baffle ring 12a is not in contact with the feeding pipe 2; an annular sealing ring 2a is arranged on the discharge pipe 2 between the baffle ring 12a and the small end face of the second conical cavity 12.
FIG. 4 is a schematic diagram showing the dimension of a material distribution chamber of a peripheral acceleration type for a horizontal decanter centrifuge, in which the inclination angle η of the conical surface of the first conical cavity 11 is 30 degrees, the wall thickness of the first conical cavity 11 is 4mm, and the radius R of the large end surface of the first conical cavity 11 is280 mm; the distance between the big end surface and the small end surface of the first conical cavity 11 is L3110 mm; radius R of convex circle 11a of small end surface of first conical cavity1Is 25 mm; the convex round surface and the conical surface are rounded, and the radius of the rounding is 10 mm; distance L from convex circle 11a to feedpipe outlet 24Is 30 mm.
The inclination angle omega of the conical surface of the second conical cavity 12 is 45 degrees; the wall thickness of the second conical cavity 12 is 4 mm; the large end face radius of the second conical cavity 12 and the large end face radius R of the first conical cavity 112Equal; the distance between the big end surface and the small end surface of the second conical cavity 12 is L190 mm; the thickness of the baffle ring 12a on the conical surface of the second conical cavity 12 is 2mm, and the distance from the baffle ring 12a to the small end surface of the second conical cavity 12 is 4 mm; the thickness of the annular sealing ring 2a on the discharge pipe 2 is 2mm, and the annular sealing ring 2a reaches the stopperThe distance of the rings 12a is 1 mm.
FIG. 7 is a schematic view of a blade A, as shown in FIG. 5, a first-stage blade A is composed of 6 blades, the first-stage blade A is a single arc thin blade with equal thickness, the thickness of the first-stage blade A is 2mm, the installation angle α of the first-stage blade A is 30 degrees, the first-stage blade A is welded along the direction of a generatrix of a conical surface of a first conical cavity 11, the section of the first-stage blade A is arc-shaped, and the radius of the arc is R320mm, arc centre angle β is 70 as shown in figure 7, a blade inlet edge a1At and outlet edge A2The radius is 8 mm.
As shown in fig. 5, 6 and 9, the second-stage blade B is composed of 10 blades; the section of the second-stage blade B is NACA9415 in NACA; the blade inlet placing angle gamma of the second-stage blade B is 50 degrees; the chord length x of the second-stage blade B is 70 mm; second stage blade B height L2Equal to the distance between the large end faces of the first and second tapered cavities, L250 mm; the distance from the inlet edge of the second stage blade B to the rotating central shaft of the second stage blade B and the large end surface radius R of the first conical cavity 11 and the second conical cavity 122Are equal.
The data in the above examples, and the specific operation manner, are only used to show a practical case, and are not used to limit the present invention, and the operation in any detail, or the corresponding modification of the data, should not be considered as the improvement of the present invention.
Claims (5)
1. Horizontal spiral shell centrifuge, its characterized in that: the device comprises a material distribution chamber (1), a feeding pipe (2), a spiral conveying shaft (3), a rotary drum (4), a spiral blade (7), a housing (10), a differential (13), a front main bearing (14), a spiral front bearing (15), a spiral rear bearing (16) and a rear main bearing (17);
a rotary drum (4) is rotatably arranged in the housing (10), a spiral conveying shaft (3) is rotatably arranged in the rotary drum (4), spiral blades (7) are fixed on the spiral conveying shaft (3), and the spiral conveying shaft (3), the rotary drum (4) and the spiral blades (7) are coaxially arranged;
a solid-phase slag discharge port (18) is formed in the left end of the housing (10), and a filtrate discharge port (19) is formed in the right end of the housing (10); a slag hole (9) is formed in the left end of the rotary drum (4), and an overflow hole (8) is formed in the right end of the rotary drum (4); the left end of the inner cavity of the rotary drum (4) is communicated with the left end of the inner cavity of the housing (10) through the slag hole (9), and the right end of the inner cavity of the rotary drum (4) is communicated with the right end of the inner cavity of the housing (10) through the overflow hole (8); the inner cavity of the material distribution chamber (1) is communicated with a cavity between the spiral conveying shaft (3) and the rotary drum (4) through a discharge hole (6); the feeding pipe (2) is arranged at the left end of the spiral conveying shaft (3), the inlet end of the feeding pipe (2) extends out of the housing (10), and the outlet end of the feeding pipe (2) is arranged in the material distribution chamber (1);
the right end of the rotary drum (4) is driven by a motor to rotate, the left end of the rotary drum (4) is connected with a differential (13), and an output shaft of the differential (13) is connected with the spiral conveying shaft (3);
the material distribution chamber is fixedly arranged in a hollow shaft of the screw conveyor and rotates along with the screw conveying shaft; the material distribution chamber (1) comprises a first conical cavity (11), a first-stage blade (A), a second conical cavity (12) and a second-stage blade (B);
the first conical cavity (11) is in a boss shape, the small end face of the first conical cavity (11) is of a convex round structure, and the convex round (11a) of the small end face of the first conical cavity (11) faces to the outlet of the feeding pipe (2); the first-stage blades (A) are uniformly welded on the conical surface of the first conical cavity (11) in the circumferential direction, the inlet edge of the first-stage blades (A) is level with the outlet plane of the feeding pipe (2), and the outlet edge of the first-stage blades (A) is level with the large end surface of the first conical cavity (11); the second conical cavity (12) is in a boss shape, the large end face of the second conical cavity (12) is opposite to the large end face of the first conical cavity (11), and a feeding pipe (2) penetrates through the center of the small end face of the second conical cavity (12); the second-stage blades (B) are uniformly welded between the large end surface of the first conical cavity (11) and the large end surface of the second conical cavity (12) in the circumferential direction; the central axes of the first conical cavity (11), the first-stage blade (A), the second conical cavity (12), the second-stage blade (B) and the feeding pipe (2) are superposed;
a first flow channel is formed between the first-stage blades (A), a second flow channel is formed between the second-stage blades (B), the first flow channel is communicated with an outlet of the feeding pipe (2) and the second flow channel, and the second flow channel is communicated with an inner cavity of the material distribution chamber (1) and an inner cavity between the spiral conveying shaft (3) and the rotary drum (4);
a baffle ring (12a) is arranged on the side, close to the small end face, of the second conical cavity (12), the plane where the baffle ring (12a) is located is perpendicular to the central shaft of the feeding pipe (2), the large-diameter end of the baffle ring (12a) is fixed on the conical surface of the second conical cavity (12), and the small-diameter end of the baffle ring (12a) is not in contact with the feeding pipe (2); an annular sealing ring (2a) is arranged on the feeding pipe (2) between the baffle ring (12a) and the small end surface of the second conical cavity (12).
2. The decanter centrifuge of claim 1, wherein the angle of inclination η of the conical surface of the first conical chamber (11) is between 20 ° and 35 °;
the wall thickness of the first conical cavity (11) is 4 mm;
the large end face radius R of the first conical cavity (11)2＝75mm～85mm
The distance between the big end surface and the small end surface of the first conical cavity (11) is L3＝110mm；
Radius R of convex circle (11a) of small end surface of first conical cavity1Is 25 mm;
the convex round surface and the conical surface are rounded, and the radius of the rounding is 10 mm;
the distance L from the convex circle (11a) to the outlet of the feeding pipe (2)4Is 30 mm.
3. A decanter centrifuge as defined in claim 1, wherein: the inclination angle omega of the conical surface of the second conical cavity (12) is 30-50 degrees;
the wall thickness of the second conical cavity (12) is 4 mm;
the large end face radius of the second conical cavity (12) and the large end face radius R of the first conical cavity (11)2Equal;
the distance between the big end surface and the small end surface of the second conical cavity (12) is L1＝90mm；
The thickness of a baffle ring (12a) on the conical surface of the second conical cavity (12) is 2mm, and the distance from the baffle ring (12a) to the small end surface of the second conical cavity (12) is 4 mm;
the thickness of the annular sealing ring (2a) on the feeding pipe (2) is 2mm, and the distance from the annular sealing ring (2a) to the baffle ring (12a) is 1 mm.
4. A decanter centrifuge as defined in claim 1, wherein: the first-stage blade (A) consists of 5-7 blades;
the first-stage blade (A) is a single arc thin blade with equal thickness, and the thickness of the first-stage blade (A) is 2 mm;
the installation angle α of the first-stage blade (A) is 30 degrees, and the first-stage blade (A) is welded along the direction of the conical surface generatrix of the first conical cavity (11);
the blade section of the first stage blade (A) is arc-shaped, and the radius of the arc is R320mm, arc center angle β is 70 °;
the inlet edge (A1) and the outlet edge (A2) of the first stage blade (A) are rounded, and the radius of the rounding is 8 mm.
5. A decanter centrifuge as defined in claim 1, wherein: the second-stage blade (B) consists of 9-11 blades;
the blade section of the second-stage blade (B) selects NACA9415 in NACA;
the placing angle gamma of the inlet of the second-stage blade (B) is 40-60 degrees;
the chord length x of the second-stage blade (B) is 70 mm;
the height of the second-stage blade (B) is equal to the distance between the large end surfaces of the first conical cavity and the second conical cavity, and L2 is 50 mm;
the distance from the inlet edge of the second stage blade (B) to the rotating central shaft of the second stage blade (B) and the large end surface radius R of the first conical cavity (11) and the second conical cavity (12)2Are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666203.2U CN210386216U (en) | 2019-05-10 | 2019-05-10 | Horizontal screw centrifugal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666203.2U CN210386216U (en) | 2019-05-10 | 2019-05-10 | Horizontal screw centrifugal machine |
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| Publication Number | Publication Date |
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| CN210386216U true CN210386216U (en) | 2020-04-24 |
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Family Applications (1)
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| CN201920666203.2U Withdrawn - After Issue CN210386216U (en) | 2019-05-10 | 2019-05-10 | Horizontal screw centrifugal machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252523A (en) * | 2019-05-10 | 2019-09-20 | 浙江工业大学 | Decanter centrifuge |
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2019
- 2019-05-10 CN CN201920666203.2U patent/CN210386216U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252523A (en) * | 2019-05-10 | 2019-09-20 | 浙江工业大学 | Decanter centrifuge |
| CN110252523B (en) * | 2019-05-10 | 2024-06-07 | 浙江工业大学 | Horizontal screw centrifuge |
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