CN209370047U - One kind being used for the dedicated smelt gear pump of Lyocell fiber device - Google Patents

Abstract

The utility model discloses one kind to be used for the dedicated smelt gear pump of Lyocell fiber device, it is related to smelt gear pump field, the junction of driving gear shaft and passive tooth wheel shaft and drive end bearing bracket and rear end cap is respectively arranged with dextrorotation seal assembly and left-handed seal assembly, preceding bearing shell and rear bearing shell are respectively arranged between driving gear shaft and passive tooth wheel shaft and shell, pump housing temperature probe is installed in the middle part of shell, its both ends is separately installed with fore bearing temperature probe and rear bearing temperature probe, one end of driving gear shaft and passive tooth wheel shaft is connect with spindle rotation connector and driven axle rotary joint respectively, preceding pressure probe and rear pressure probe are respectively arranged on the drive end bearing bracket and rear end cap at shell both ends.Its temperature control precision is high, and effect is good, using special cavity runner design, eliminates dead angle to greatest extent, avoids material carbonization, goes bad, has self-lubricating property, and guarantee certain service life in the case where material lubricity is extremely weak.

Description

One kind being used for the dedicated smelt gear pump of Lyocell fiber device

Technical field

The utility model relates to one kind to be used for the dedicated smelt gear pump of Lyocell fiber device, belong to smelt gear pump skill Art field.

Background technique

Lyocell fiber (implying that disappearing fibre) is known as 21 century green fiber, it is with N-methylmorpholine-N- oxygen Compound (NMMO) is solvent, the regenerated celulose fibre for wet process spinning.Waste can natural degradation, the oxygen in production process Change amine solvent can 99.5% recycling, production exhaust emission is extremely low and end product can natural degradation be its main feature.But by Degradation reaction can be caused under given conditions as the NMMO of solvent in its production process, and be possible to cause violent company Lock reactor (explosion), so there is extremely harsh technical requirements to its production equipment.

Smelt gear pump for conveying, pressurizeing is exactly one of important equipment, and the production technology of Lyocell fiber is wanted Ask delivery pump to have some characteristics: 1, the temperature of guarantee conveying material is constant, and pump will have the dynamic temperature control energy for actively heating, cooling down Power；2, discharge pressure reaches as high as 25Mpa, material viscosity reaches 3000Pa.s；3, material requirement is in vacuum environment, and isolation is empty Gas；4, require pump bearing by material self-lubricating, material not can contact consistent lubricant, lubricating oil, copper ion；5, long-term 24 hours nothings It is interrupted the reliability of continuous operation.Common pump class product mainly has common gear pump, centrifugal pump, plunger pump in the market, such as Common gear pump can not actively heat cooling, and dynamic adjusts temperature, is also unable to satisfy the requirement of high-viscosity material self-lubricating；Centrifugation Pump can not adapt to high-viscosity material, equally can not dynamically adjust temperature because revolving speed is high；Plunger pump can not adapt to high-viscosity material Continuous production free of discontinuities also can not dynamically adjust temperature.It is fine that the pump of the above common structure type is neither able to satisfy conveying Lyocell The requirement for tieing up pyrosol does not have the characteristic for pumping itself active temperature control and conveying high temperature and pressure high-viscosity material generally.Currently, Conveying, pressurization, the metering of the industries high-temp high-viscosity polymer melt such as plastics, resin, rubber, chemical fibre are mainly solved with Melt Pump Certainly, Melt Pump is a kind of positive conveyance device, and the revolving speed of flow and pump is in stringent proportional relation.Mainly by pump case, active The composition such as gear, driven gear, sliding bearing, front and back end plate, packing seal.By the flank profil of two gears, the pump housing, side cover plate structure At feed zone, conveying area and the material discharge region of pump.Become when work by swept volume caused by the intermeshing of driving and driven gear Change and carrys out melt conveying.When gear is rotated by prescribed direction, melt enters in the tooth socket of two gear of feed zone, as gear turns Dynamic, melt is brought into conveying area from two sides, and the engagement once again of gear is extruded the melt in tooth socket, is sent to outlet conduit.

But since very big shearing force can be generated when crushing failure at high speed hot plastic melt, lead to be sheared temperature of charge sharply It increases, for thermally sensitive Lyocell fiber production technology, existing Melt Pump is unable to satisfy requirement at all.It is right simultaneously Completely cutting off air, special substance requirement of material contact portion etc. is all common Melt Pump without realization.

Utility model content

In view of the above-mentioned problems, the technical problem to be solved by the present invention is to provide one kind to be used for Lyocell fiber device Dedicated smelt gear pump.

One kind of the utility model is used for the dedicated smelt gear pump of Lyocell fiber device, it includes shell, driving gear Axis, passive tooth wheel shaft, drive end bearing bracket, rear end cap, dextrorotation seal assembly, left-handed seal assembly, preceding bearing shell, rear bearing shell, pump housing thermometric Probe, fore bearing temperature probe, rear bearing temperature probe, spindle rotation connector, driven axle rotary joint, preceding pressure probe and Pressure probe afterwards, is provided with driving gear shaft and passive tooth wheel shaft in shell, the both ends of shell be respectively arranged with drive end bearing bracket and after The junction of end cap, driving gear shaft and passive tooth wheel shaft and drive end bearing bracket and rear end cap is respectively arranged with dextrorotation seal assembly and a left side Seal assembly is revolved, is respectively arranged with preceding bearing shell and rear bearing shell between driving gear shaft and passive tooth wheel shaft and shell, in shell Portion is equipped with pump housing temperature probe, and both ends are separately installed with fore bearing temperature probe and rear bearing temperature probe, driving gear One end of axis and passive tooth wheel shaft is connect with spindle rotation connector and driven axle rotary joint respectively, the drive end bearing bracket at shell both ends With preceding pressure probe and rear pressure probe are respectively arranged on rear end cap.

Preferably, the drive end bearing bracket and rear end cap are by end cap matrix, runner, first outlet flange, first entrance Flange forms, and is provided with runner in end cap matrix, the upper end of end cap matrix is provided with first outlet flange, the lower end of end cap matrix It is provided with first entrance flange, end cap matrix is made of stainless steel material, and several holes hole, and hole are distributed inside end cap surrounding It communicates with one another with hole, forms runner, when work, liquid medium enters from first entrance flange, flows out from first outlet flange, together Sample controls the temperature of medium, flow to realize the temperature control of end cap.

Preferably, the shell is by pump case ontology, runner hole, collet, second outlet flange, second entrance flange Composition is provided with runner hole in pump case ontology, and the upper and lower ends of pump case ontology are respectively welded collet, above collet on set Be equipped with second outlet flange, be provided with second entrance flange on the collet of lower section, pump case ontology cast using stainless steel material and At, under certain volume, guarantee pressure rating needed for wall thickness while, as far as possible enlarged surface product, necessity be can again on Lower surface is welded with deflector, increases heat-conducting area, and collet is welded on pump case ontology after using the bending of pressure vessel stainless-steel sheet Top and bottom, form two independent cavitys, two cavitys are connected to by four runner holes, and when work, liquid medium enters from second Mouth flange enters, and through lower chamber to upper cavity, flows out from second outlet flange, controls temperature, the flow of medium equally to realize The temperature of end cap controls.

Preferably, the driving gear shaft and passive tooth wheel shaft use the surfaces nitrided Wear-resistant Treatment of high-quality nitrated steel, For surface hardness up to 900HV, matrix has good toughness simultaneously, not easy to break under high load, have certain impact resistance ability, Axle center hollow design, fitted shaft rotary joint when use are controlled in the obstructed liquid medium in axle center by controlling the temperature of medium The temperature of gear shaft processed, and then the shear heat that gear shearing material generates is offset, avoid temperature of charge from requiring and become beyond technique Matter, carbonization, this characteristic are not available for common smelt gear pump.

Preferably, the dextrorotation seal assembly and left-handed seal assembly are special specially to design for such operating condition Seal assembly, primary seal section mainly utilize backpitch labyrinth type mechanical seal, the reverse push that spiral generates when being rotated using axis Power offsets certain leak pressure, can stop material leakage completely under suitable viscosity, revolving speed, helical design parameter, generally Revolving speed can not change after being limited by piping flow design, helix parameter factory, therefore the material for trying dynamic change seal section is viscous It spends to obtain broader condition range, the spiral sleeve of this programme has hollow cavity, leads to liquid medium in use process lumen body (can be water, oil etc.) interferes the temperature of helical position by controlling temperature, the flow of medium to change the viscosity of material (material viscosity and temperature be in reverse characteristic), back segment are sealed into polytetrafluoroethylsealed sealed circle and combine, and are mainly used for that viscosity is especially low, prevents sky Gas enters in pump from sealing, can also install sealing liquid device (being common in mechanical seal) Lai Tisheng gas sealingability when necessary additional.

Preferably, the increment face faying face high pressure chest side of the preceding bearing shell and rear bearing shell is provided with compensating groove, leads Chute, excessive face, lubricating end surface slot and inner hole lubricating screw slot, excessive face be irregular face, it is therefore an objective to allow pump intake bore and Gear tooth profile relative smooth is excessive, prevents from forming dead angle, and material prolonged stay is caused to cause to go bad, be carbonized, inner hole lubrication Helicla flute 25 is the requirement for bearing self-lubricating and the large pitch helicla flute that designs, and groove depth is faced out by increment to be become gradually Shallowly；When work, material squeezes into compensating groove by high pressure chest side, enters inner hole lubricating screw slot through diversion trench, in gradually becoming shallower as A buffer brake is formed in the lubricating screw slot of hole, is made material in the of short duration delay of inner hole, is formed in the case where axis is rotated and driven Lubricating film, so that the effect of lubricating end surface slot is between oilgear end face and bearing face using material self-lubricating itself Friction.

It is process preferably, the preceding bearing shell and rear bearing shell are all made of bearing tool steel material.

Preferably, the effect of the spindle rotation connector and driven axle rotary joint be by liquid from pipeline this While be input in the equipment of rotation or reciprocating motion, then from the sealing device for the connection being wherein discharged, flow direction divide one-way flow, It two-way circulates, the structure point inner tube of inner tube is fixed, inner tube rotates, and what this programme was selected is the fixed bidirectional flow flow-through of inner tube, liquid Medium enters axle center part by inner tube, then is returned by hollow layer outside pipe, leads to liquid inside the axis realized in rotary motion for cooperating Medium.

Preferably, the preceding pressure probe and rear pressure probe are used to detect the leak pressure at sealing, then Seal assembly auxiliary cooling device is fed back, dynamic adjusts the amount of cooling water of cooling device, and then reaches a critical point, both keeps A force combination air from inside to outside enters in pump, and prevents pressure is excessive from causing to leak at sealing.

The utility model has the beneficial effects that it specifically for similar Lyocell fiber production technology particular/special requirement and into There is existing other types Melt Pump not have performance characteristics, verify by real case for the smelt gear pump of row special designing, Technique requirement is met, has reached desired effect, temperature control precision is high, and effect is good, using special cavity runner design, most The elimination dead angle of limits avoids material carbonization, goes bad, has self-lubricating property, and in the case where material lubricity is extremely weak Guaranteeing certain service life, for special material to adapt to Lyocell fiber manufacturing technique requirent, sealing leakage rate dynamic is adjustable, It is able to maintain vacuum, completely cuts off air, discharge pressure is stablized, and longer life expectancy.

Detailed description of the invention

The present invention is described in detail by the following detailed description and drawings for ease of explanation,.

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of forward and backward end cap in the utility model；

Fig. 3 is the structural schematic diagram of shell in the utility model；

Fig. 4 is the structural schematic diagram of forward and backward bearing shell in the utility model；

Fig. 5 is the top view of forward and backward bearing shell in the utility model.

1- shell；1-1- pump case ontology；1-2- runner hole；1-3- collet；1-4- second outlet flange；1-5- second entrance Flange；2- driving gear shaft；3- passive tooth wheel shaft；4- drive end bearing bracket；5- rear end cap；6- rear end cap；The left-handed seal assembly of 7-；Before 8- Bearing shell；Bearing shell after 9-；10- pump housing temperature probe；11- fore bearing temperature probe；12- rear bearing temperature probe；The rotation of 13- driving shaft Adapter；14- driven axle rotary joint；Pressure probe before 15-；Pressure probe after 16-；17- end cap matrix；18- runner；19- First outlet flange；20- first entrance flange；21- compensating groove；22- diversion trench；The excessive face 23-；24- lubricating end surface slot；25- Inner hole lubricating screw slot.

Specific embodiment

As Figure 1-Figure 5, present embodiment use following technical scheme: it include shell 1, driving gear shaft 2, Passive tooth wheel shaft 3, drive end bearing bracket 4, rear end cap 5, dextrorotation seal assembly 6, left-handed seal assembly 7, preceding bearing shell 8, rear bearing shell 9, the pump housing Temperature probe 10, fore bearing temperature probe 11, rear bearing temperature probe 12, spindle rotation connector 13, driven axle rotary joint 14, preceding pressure probe 15 and rear pressure probe 16, are provided with driving gear shaft 2 and passive tooth wheel shaft 3 in shell 1, and the two of shell 1 End is respectively arranged with drive end bearing bracket 4 and rear end cap 5, the connection of driving gear shaft 2 and passive tooth wheel shaft 3 and drive end bearing bracket 4 and rear end cap 5 Place is respectively arranged with dextrorotation seal assembly 6 and left-handed seal assembly 7, between driving gear shaft 2 and passive tooth wheel shaft 3 and shell 1 It is respectively arranged with preceding bearing shell 8 and rear bearing shell 9, the middle part of shell 1 is equipped with pump housing temperature probe 10, before both ends are separately installed with It is revolved respectively with driving shaft one end of measuring temperature of bearing probe 11 and rear bearing temperature probe 12, driving gear shaft 2 and passive tooth wheel shaft 3 Adapter 13 and driven axle rotary joint 14 connect, and are respectively arranged with preceding pressure on the drive end bearing bracket 4 and rear end cap 5 at 1 both ends of shell Probe 15 and rear pressure probe 16.

Wherein, the drive end bearing bracket 4 and rear end cap 5 are by end cap matrix 17, runner 18, first outlet flange 19, first Inlet flange 20 forms, and is provided with runner 18 in end cap matrix 17, and the upper end of end cap matrix 17 is provided with first outlet flange 19, The lower end of end cap matrix 17 is provided with first entrance flange 20, and end cap matrix 17 is made of stainless steel material, along end cap surrounding Inside distribution several holes hole, and Kong Yukong communicates with one another, and forms runner 18, and when work, liquid medium is from first entrance flange 20 Into being flowed out from first outlet flange 19, the same temperature for controlling medium, flow realize the temperature control of end cap；Described Shell 1 is made of pump case ontology 1-1, runner hole 1-2, collet 1-3, second outlet flange 1-4, second entrance flange 1-5, pump Runner hole 1-2 is provided in shell ontology 1-1, the upper and lower ends of pump case ontology 1-1 are respectively welded collet 1-3, above folder It is provided with second outlet flange 1-4 on set 1-3, second entrance flange 1-5, pump case ontology 1-1 are provided on the collet 1-3 of lower section Cast using stainless steel material, under certain volume, guarantee pressure rating needed for wall thickness while, expand as far as possible Surface area, necessity are upper and lower surface to be welded with deflector again, increase heat-conducting area, collet 1-3 uses pressure vessel stainless steel steel It is welded on the top and bottom of pump case ontology 1-1 after plate bending, forms two independent cavitys, two cavitys are by four runner hole 1-2 Connection, when work, liquid medium enters from second entrance flange 1-5, through lower chamber to upper cavity, from second outlet flange 1-4 Outflow controls temperature, the flow of medium equally to realize the temperature control of end cap；The driving gear shaft 2 and driven gear Axis 3 uses the surfaces nitrided Wear-resistant Treatment of high-quality nitrated steel, and for surface hardness up to 900HV, matrix has good toughness simultaneously, high It is not easy to break under load, have certain impact resistance ability, axle center hollow design, fitted shaft rotary joint when use, in axle center Obstructed liquid medium controls the temperature of gear shaft by controlling the temperature of medium, and then offsets what gear shearing material generated Shear heat avoids temperature of charge from requiring beyond technique and go bad, be carbonized, this characteristic is not available for common smelt gear pump 's；The dextrorotation seal assembly 6 and left-handed seal assembly 7 is the special seal assemblies specially designed for such operating condition, just Grade seal section mainly utilizes backpitch labyrinth type mechanical seal, and the deboost that spiral generates when being rotated using axis is certain to offset Leak pressure, can stop material leakage completely under suitable viscosity, revolving speed, helical design parameter, and general revolving speed is limited by pipe It can not change after road flow design, helix parameter factory, therefore the material viscosity for trying dynamic change seal section is wider to obtain Condition range, the spiral sleeve of this programme has a hollow cavity, and liquid medium is led in use process lumen body (can be water, oil Deng), the temperature of helical position is interfered by controlling the temperature of medium, flow to change the viscosity of material (material viscosity and Temperature is in reverse characteristic), back segment is sealed into polytetrafluoroethylsealed sealed circle and combines, and is mainly used for that viscosity is especially low, prevents air from sealing Sealing liquid device (being common in mechanical seal) Lai Tisheng gas sealingability can also be installed additional into pump, when necessary；The front axle Watts 8 and the increment face faying face high pressure chest side of rear bearing shell 9 be provided with compensating groove 21, diversion trench 22, excessive face 23, lubricating end surface Slot 24 and inner hole lubricating screw slot 25, excessive face 23 are irregular face, it is therefore an objective to allow pump intake bore and gear tooth profile phase It to smooth excessiveness, prevents from forming dead angle, material prolonged stay is caused to cause to go bad, be carbonized, inner hole lubricating screw slot 25 is to be directed to The requirement of bearing self-lubricating and the large pitch helicla flute designed, groove depth are faced out by increment and are shoaled gradually；When work, material by Compensating groove 21 is squeezed into high pressure chest side, enters inner hole lubricating screw slot 25 through diversion trench 22, in the inner hole lubricating screw gradually become shallower as A buffer brake is formed in slot 25, is made material in the of short duration delay of inner hole, is formed lubricating film in the case where axis is rotated and driven, from And material self-lubricating itself is utilized, the effect of lubricating end surface slot 24 is the friction between oilgear end face and bearing face；Institute The preceding bearing shell 8 and rear bearing shell 9 stated are all made of bearing tool steel material and are process；The spindle rotation connector 13 and passive The effect of axis rotary joint 14 is by liquid from the equipment that this side of pipeline is input to rotation or reciprocating motion, then from wherein arranging The sealing device of connection out, flow direction divide one-way flow, two-way circulate, and the structure point inner tube of inner tube is fixed, inner tube rotates, this What scheme was selected is the fixed bidirectional flow flow-through of inner tube, and liquid medium enters axle center part by inner tube, then is returned by hollow layer outside pipe, uses It is realized in cooperation and leads to liquid medium inside the axis in rotary motion；The preceding pressure probe 15 and rear pressure probe 16 is for examining The leak pressure at sealing is surveyed, then feedback arrives seal assembly auxiliary cooling device, and dynamic adjusts the amount of cooling water of cooling device, And then reach a critical point, not only kept a force combination air from inside to outside to enter in pump, but also prevent pressure is excessive from making It is leaked at sealing.

Present embodiment carries out special designing specifically for the particular/special requirement similar to Lyocell fiber production technology Smelt gear pump, have existing other types Melt Pump do not have performance characteristics, verified by real case, meet technique It is required that having reached desired effect, temperature control precision is high, and effect is good, using special cavity runner design, disappears to greatest extent Except dead angle, avoids material carbonization, goes bad, there is self-lubricating property, and guarantee centainly in the case where material lubricity is extremely weak In the service life, for special material to adapt to Lyocell fiber manufacturing technique requirent, sealing leakage rate dynamic is adjustable, is able to maintain vacuum, Completely cut off air, discharge pressure is stablized, and longer life expectancy.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model Claimed range is defined by the appending claims and its equivalent thereof.

Claims (6)

1. one kind is used for the dedicated smelt gear pump of Lyocell fiber device, it is characterised in that: it includes shell (1), driving gear Axis (2), passive tooth wheel shaft (3), drive end bearing bracket (4), rear end cap (5), dextrorotation seal assembly (6), left-handed seal assembly (7), front axle Watt (8), rear bearing shell (9), pump housing temperature probe (10), fore bearing temperature probe (11), rear bearing temperature probe (12), driving shaft Rotary joint (13), driven axle rotary joint (14), preceding pressure probe (15) and rear pressure probe (16), the interior setting of shell (1) There are driving gear shaft (2) and passive tooth wheel shaft (3), the both ends of shell (1) are respectively arranged with drive end bearing bracket (4) and rear end cap (5), main Movable gear shaft (2) and passive tooth wheel shaft (3) and drive end bearing bracket (4) and the junction of rear end cap (5) are respectively arranged with dextrorotation sealing group Part (6) and left-handed seal assembly (7), before being respectively arranged between driving gear shaft (2) and passive tooth wheel shaft (3) and shell (1) Bearing shell (8) and rear bearing shell (9) are equipped with pump housing temperature probe (10) in the middle part of shell (1), and both ends are separately installed with fore bearing One end of temperature probe (11) and rear bearing temperature probe (12), driving gear shaft (2) and passive tooth wheel shaft (3) respectively and actively Axis rotary joint (13) and driven axle rotary joint (14) connect, and divide on the drive end bearing bracket (4) and rear end cap (5) at shell (1) both ends It is not provided with preceding pressure probe (15) and rear pressure probe (16).

2. according to claim 1 a kind of for the dedicated smelt gear pump of Lyocell fiber device, it is characterised in that: institute The drive end bearing bracket (4) and rear end cap (5) stated are by end cap matrix (17), runner (18), first outlet flange (19), first entrance method Blue (20) composition, end cap matrix (17) is interior to be provided with runner (18), and the upper end of end cap matrix (17) is provided with first outlet flange (19), the lower end of end cap matrix (17) is provided with first entrance flange (20), and end cap matrix (17) is made of stainless steel material, It is distributed several holes hole inside end cap surrounding, and Kong Yukong communicates with one another, is formed runner (18).

3. according to claim 1 a kind of for the dedicated smelt gear pump of Lyocell fiber device, it is characterised in that: institute The shell (1) stated is by pump case ontology (1-1), runner hole (1-2), collet (1-3), second outlet flange (1-4), second entrance Flange (1-5) composition, pump case ontology (1-1) is interior to be provided with runner hole (1-2), and the upper and lower ends of pump case ontology (1-1) are welded respectively Be connected to collet (1-3), above collet (1-3) on be provided with second outlet flange (1-4), set on the collet (1-3) of lower section It is equipped with second entrance flange (1-5), pump case ontology (1-1) is cast using stainless steel material, and collet (1-3) is held using pressure It is welded on the top and bottom of pump case ontology (1-1) after device stainless-steel sheet bending, forms two independent cavitys, two cavitys are by four A runner hole (1-2) connection.

4. according to claim 1 a kind of for the dedicated smelt gear pump of Lyocell fiber device, it is characterised in that: institute The driving gear shaft (2) and passive tooth wheel shaft (3) stated use the surfaces nitrided Wear-resistant Treatment of high-quality nitrated steel.

5. according to claim 1 a kind of for the dedicated smelt gear pump of Lyocell fiber device, it is characterised in that: institute The increment face faying face high pressure chest side of the preceding bearing shell (8) and rear bearing shell (9) stated be provided with compensating groove (21), diversion trench (22), Excessive face (23), lubricating end surface slot (24) and inner hole lubricating screw slot (25), excessive face (23) are irregular face, and inner hole lubricates spiral shell The groove depth of spin slot (25) is faced out by increment to shoal gradually.

6. according to claim 1 a kind of for the dedicated smelt gear pump of Lyocell fiber device, it is characterised in that: institute The preceding bearing shell (8) and rear bearing shell (9) stated are all made of bearing tool steel material and are process.