CN105952636B - The capacity new-type double screw pump of self-lubricating supporting - Google Patents

The capacity new-type double screw pump of self-lubricating supporting Download PDF

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Publication number
CN105952636B
CN105952636B CN201610292279.4A CN201610292279A CN105952636B CN 105952636 B CN105952636 B CN 105952636B CN 201610292279 A CN201610292279 A CN 201610292279A CN 105952636 B CN105952636 B CN 105952636B
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China
Prior art keywords
pump
bearing
screw rod
self
driven
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CN201610292279.4A
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CN105952636A (en
Inventor
竺志大
曾励
孙冲
张帆
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Yangzhou University
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Yangzhou University
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Publication of CN105952636A publication Critical patent/CN105952636A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12Rotary-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
    • F04C2/14Rotary-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
    • F04C2/16Rotary-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H55/00Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02Toothed members; Worms
    • F16H55/08Profiling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/20Rotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/50Bearings

Abstract

The capacity new-type double screw pump of self-lubricating supporting, belong to screw pump technology field, left pump case is provided with medium input, right pump case is provided with medium output end, left pump case inside right pump case junction with being provided with self-lubricating bearing device, run through driving screw rod and driven screw provided with varying pitch in the pump housing, left pump case end is connected with rear support lid, the driving gear and driven gear being meshed are provided with rear support lid, the end face of rear support lid is provided with rear end cap, the end of right pump case is connected with front support lid, the end face of front support lid is provided with drive end bearing bracket, power intake of the drive end bearing bracket as Quimby pump is stretched out on the head of driving screw rod;Change volume by changing the pitch of screw rod fixation, vibration and noise when making it possible to reduce the deformation at the middle part of screw rod in Quimby pump work process and reducing transfer gas liquid medium, improve the stationarity of screw rod pump drive, the bearing capacity of gear is improved, so as to improve the operating efficiency of screw pump.

Description

The capacity new-type double screw pump of self-lubricating supporting
Technical field
The invention belongs to screw pump technology field, is related to the capacity new-type double screw pump of self-lubricating supporting, particularly relates to And a kind of bearing supporting, wildhaber-novikov gear pump drive, the new-type double screw pump of capacity occasion.
Background technology
Quimby pump is a kind of positive displacement quantitative pump, the screw rod intermeshing in pump, screw rod and hole wall, the pump for accommodating screw rod The annular seal space that the compositions such as body are connected to each other one by one.The synchronized gear drive connection in end of two screw rods, synchromesh gear are set In gear-box, there is independent lubrication, separated with pump chamber.Synchromesh gear ensure screw rod relative to continuous static rotation so that Annular seal space has no agitation ground and smoothly elapsed forward continuously in axial direction, so as to realize pumping purpose.The outstanding feature of Quimby pump That there is good self-priming performance, can pulse free, continuously and smoothly feed flow, the pressure stability of its pumped (conveying) medium, flow is constant, It is with small vibration, noise is low.The above-mentioned performance of Quimby pump, makes it have a wide range of applications field, be usually used in oil field, oil refining, steel, The every profession and trades such as thermoelectricity, chemical industry, convey the especially highly viscous liquid medium of various viscosity.
But its shortcoming is:
1. pumped (conveying) medium moves from input port to delivery outlet, the volume of the effective volume of pumped (conveying) medium in pump chamber is kept It is constant, only changed in the input port of pump and delivery outlet position, so when input port and delivery outlet have larger pressure difference, , will not be too high in the pressure of delivery outlet because gas easily compresses when especially conveying gas, surge is easily produced, is dropped significantly The delivery efficiency of low pump.
2. because the structure of the synchronous gear transmission device of current Quimby pump use is mainly spur gear, helical gear.Though Right spur-gear mechanism manufacture and assembly technology are fairly simple, but when gear is engaged with exiting, easily produce impact, shake Dynamic and noise, its bearing capacity are also poor;Screw-wheel gearing overlap coefficient is big, stable drive, the strength of gear teeth are high, suitable for heavy burden It is low to carry biography, noise, but helical teeth can produce axial force, assembly technology compared with spur gear complexity.
3. in the Quimby pump course of work, screw rod can be influenceed by the pressure of fluid, and screw rod can deform, particularly Moderate finite deformation can occur in the middle part of screw rod.
The content of the invention
The purpose of the present invention is to be directed to existing technical problem, proposes the capacity new-type double screw pump of self-lubricating supporting, Change volume by changing the pitch of screw rod fixation, enabling reduce the change at the middle part of screw rod in Quimby pump work process Vibration and noise, the stationarity of improvement screw rod pump drive when shape and reduction transfer gas liquid medium, improve the carrying of gear Power, so as to improve the operating efficiency of screw pump.
The technical scheme is that:The capacity new-type double screw pump of self-lubricating supporting, including Quimby pump housing;Its It is characterised by:The Quimby pump housing is connected and composed by left pump case and right pump case, and the left pump case is provided with medium Input, the right pump case are provided with medium output end, and the left pump case inside right pump case junction with being provided with from profit Slide-bar bearing apparatus, the left pump case is with running through driving screw rod and driven screw provided with varying pitch, the master in right pump case The outline of dynamic screw rod and driven screw is engaged with Quimby pump inner walls, and the left pump case end is propped up after being connected with Lid is held, the driving gear and driven gear being meshed, the driving gear and the driving screw rod are provided with the rear support lid Effect is connected, and the driven gear is connected with driven screw effect, and the end face of the rear support lid is provided with rear end cap, described The end of right pump case is connected with front support lid, and the end face of the front support lid is provided with drive end bearing bracket, the head of the driving screw rod Power intake of the drive end bearing bracket as Quimby pump, the rear end cap, rear support lid, left pump case, right pump case stretch out in portion Body, front support lid and drive end bearing bracket form the cavity of closing by mechanical seal.
The driving screw rod and driven screw are all the single-head screws of uniform varying pitch, and tooth form is trapezoidal, and driving screw rod is Convex stepped tooth, driven screw are recessed stepped tooth, and driving screw rod is intermeshed with driven screw.
The uniformly varying pitch is the change of the descending generation of pitch on driving screw rod and driven screw, and initial pitch is P, lift d, screw rod upper tooth number are n, and pitch is descending with p+nd, p+ (n-1) d, p+ (n-2) d, p+ (n-3) d successively class Push away.
The driving gear and driven gear are Novikov gears with double circular arc tooth profiles, and the modulus of driving gear and driven gear, the number of teeth are equal Equal, driving gear is connected by geared sleeve with driving screw rod, and geared sleeve is connected by flat key with driving screw rod.
The axial direction of the driving gear and driven gear sets bushing and stripped nut respectively.
The self-lubricating bearing device is between left pump case and right pump case, and embedded left pump case and right pump case It is interior;Self-lubricating bearing device is by bearing positioning device, the active lubrication bearing being arranged in bearing positioning device and driven lubrication Bearing and the catch composition being connected with bearing positioning device;The both sides of self-lubricating bearing device are provided with rectangular opening;Active lubrication Bearing and driven lubrication bearing are connected and composed by upper half bearing body with bottom half-bearing body by dovetail manner.
The inwall of the active lubrication bearing and driven lubrication bearing is equipped with circular arc tank, the bar number of tank 6.
The bottom half-bearing body of the active lubrication bearing to be flat, the upper half bearing body of driven lubrication bearing be it is flat, two The planar base surface of individual half-and-half bearing body contacts with each other to form support, to reduce the deformation in the middle part of screw rod.
The material of the upper half bearing body and bottom half-bearing body is ultra high molecular weight polyethylene material.
The middle part of the driving screw rod and driven screw is plain shaft structure, plain shaft structure and active lubrication bearing, The internal diameter of driven lubrication bearing forms gap and coordinated.
Beneficial effects of the present invention are:The capacity new-type double screw pump of self-lubricating supporting proposed by the present invention, structure are new Grain husk, operation principle is clear, and intermeshing driving and driven varying pitch screw is employed in structure, is provided with the middle part of driving and driven screw rod Self-lubricating bearing device, driving screw rod backwards rotation relative with driven screw, pumped (conveying) medium enter from big pitch end, driving screw rod The cavity body formed with driven screw and pump chamber, with the relative rotation of screw rod, thread constantly extrudes cavity body, make cavity body to Fine pitch extreme direction is moved, until output, volume of cavity is gradually reduced during this, has given pumped (conveying) medium effective precompressed Contracting, change volume by changing the pitch of screw rod fixation, enabling reduce the middle part of screw rod in Quimby pump work process Deformation and vibration and noise when reducing transfer gas liquid medium, improve the stationarity of screw rod pump drive, improve gear Bearing capacity, so as to improve the operating efficiency of screw pump.
Specifically have the beneficial effect that:
1. the pitch of the screw rod used uniformly diminishes, so as to have precommpression to pumped (conveying) medium in pump chamber, this is to delivery outlet Surge have inhibitory action so that the work of pump more flatten out surely, reduce vibration and noise.
2. using Double circular arc gear drive, its transmission is more steady, and vibration and noise are small.Further, since its thickness at root of tooth compared with Greatly, its bearing capacity is also very high.
3. Quimby pump self-lubricating bearing makes to form mutually support between principal and subordinate's screw rod, become so as to reduce the middle part of screw rod Shape, improve the operating efficiency of Quimby pump.
Can be in bearing 4. the Quimby pump self-lubricating bearing in the present invention is manufactured by composite, during screw rod pump work Surface forms one layer of lubricating water film, bearing is formed self-lubricating, reduces the abrasion of screw rod.
Brief description of the drawings
Fig. 1 is general assembly structural representation of the present invention.
Fig. 2 flows to schematic diagram for medium flow field in the present invention through self-lubricating bearing device.
Fig. 3 is the driving screw rod and driven screw engaging structure schematic diagram of varying pitch in the present invention.
Fig. 4 changes screw pump volume method schematic diagram to be related to other in the present invention.
Fig. 5 is middle gear engaging structure schematic diagram of the present invention.
Fig. 6 is self-lubricating bearing apparatus structure schematic diagram in the present invention.
Fig. 7 is upper half bearing body in the present invention and bottom half-bearing attachment structure schematic diagram.
In figure:Driven gear 1, driven gear bushing 1-1, driven gear flat key 1-2, driving gear 2, driving gear bushing 2-1, geared sleeve 2-2, fastening bolt 2-3, stripped nut 2-4, flat key 2-5, rear end cap 3, rear support lid 4, clamping screw 5, Driven screw 6, driving screw rod 7, left pump case 8, self-lubricating bearing device 9, bearing positioning device 9-1, holding screw 9-2, on Optical axis 9-4, bottom half-bearing 9-5, driven screw centre optical axis 9-6, catch 9-7, right pump case among half-and-half bearing 9-3, driving screw rod Body 10, front support lid 11, drive end bearing bracket 12, bearing support 13, medium input 14, medium output end 15.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings:
As shown in figs. 1-7, the capacity new-type double screw pump of self-lubricating supporting, including Quimby pump housing;Quimby pump Housing is connected and composed by left pump case 8 and right pump case 10, and left pump case 8 is provided with medium input 14, in right pump case 10 Provided with medium output end 15, left pump case 8 inside the right junction of pump case 10 with being provided with self-lubricating bearing device 9, left pump case 8 Foreign steamer with running through driving screw rod 7 and driven screw 6 provided with varying pitch, driving screw rod 7 and driven screw 6 in right pump case 10 Exterior feature is engaged with Quimby pump inner walls, and the left end of pump case 8 is connected with rear support lid 4, is provided with rear support lid 4 and mutually nibbles The driving gear 2 and driven gear 1 of conjunction, driving gear 2 are connected with the effect of driving screw rod 7, and driven gear 1 is made with driven screw 6 With being connected, the end face of rear support lid 4 is provided with rear end cap 3, and the end of right pump case 10 is connected with front support lid 11, front support lid 11 end face is provided with drive end bearing bracket 12, and power intake of the drive end bearing bracket 12 as Quimby pump, rear end are stretched out in the head of driving screw rod 7 Lid 3, rear support lid 4, left pump case 8, right pump case 10, front support lid 11 and drive end bearing bracket 12 form closing by mechanical seal Cavity.
As shown in figs. 1-7, the capacity new-type double screw pump of self-lubricating supporting, driving screw rod 7 and driven screw 6 are all equal The single-head screw of even varying pitch, for tooth form to be trapezoidal, driving screw rod 7 be convex stepped tooth, and driven screw 6 is recessed trapezoidal Tooth, driving screw rod 7 are intermeshed with driven screw 6;Uniform varying pitch be on driving screw rod 7 and driven screw 6 pitch by greatly to The change of small generation, initial pitch are p, and lift d, screw rod upper tooth number is n, and pitch is descending with p+nd, p+ (n-1) d, p+ (n-2) d, p+ (n-3) d;Driving gear 2 and driven gear 1 are Novikov gears with double circular arc tooth profiles, driving gear 2 and driven tooth The modulus of wheel 1, the number of teeth are equal, and driving gear 2 is connected by geared sleeve 2-2 with driving screw rod 7, and geared sleeve 2-2 passes through flat key 2-5 is connected with driving screw rod 7;The axial direction of driving gear 2 and driven gear 1 sets bushing 2-1 and stripped nut 2-4 respectively; Self-lubricating bearing device 9 is between left pump case 8 and right pump case 10, and in embedded left pump case 8 and right pump case 10;From Bearing arrangement 9 is lubricated by bearing positioning device 9-1, the active lubrication bearing being arranged in bearing positioning device 9-1 and driven profit Plain besring and the catch 9-7 compositions being connected with bearing positioning device 9-1;The both sides of self-lubricating bearing device 9 are provided with rectangular opening; Active lubrication bearing and driven lubrication bearing are connected structure with bottom half-bearing body 9-5 by upper half bearing body 9-3 by dovetail manner Into;The inwall of active lubrication bearing and driven lubrication bearing is equipped with circular arc tank, the bar number of tank 6;Active lubrication axle The bottom half-bearing body 9-5 held to be flat, the upper half bearing body 9-3 of driven lubrication bearing be it is flat, two half-and-half bearing bodies it is flat Face contacts with each other to form support, to reduce the deformation in the middle part of screw rod;Upper half bearing body 9-3 and bottom half-bearing body 9-5 material is Ultra high molecular weight polyethylene material;The middle part of driving screw rod 7 and driven screw 6 is plain shaft structure, optical axis knot The internal diameter of structure and active lubrication bearing, driven lubrication bearing forms gap and coordinated.
As shown in Fig. 2 the capacity new-type double screw pump of self-lubricating supporting, for the ease of installing self-lubricating bearing device 9, Quimby pump housing is divided into 8,10 two parts.Input and output end are respectively on housing 8 and housing 10, and liquid is through screw pump The entrance of housing 8 enters pump chamber, is discharged from the outlet of housing 10, and flow direction is as shown by the arrows in Figure 2.
As shown in figure 3, the capacity new-type double screw pump of self-lubricating supporting, by taking the pitch of driving screw rod as an example, screw rod spiral shell Away from being p, lift d for initial pitch, other capacity schemes are as shown in Fig. 4-a, 4-b, 4-c, and Fig. 4-a are by changing screw slot Depth, pairing screw rod increases and decreases △ d, Fig. 4-b by changing the width of screw slot respectively, pairing screw rod increase and decrease respectively △ t, Fig. 4- C then realizes capacity by the taper of screw rod.
As shown in figure 5, the capacity new-type double screw pump of self-lubricating supporting, housing 10 provide with bearing support 13 for screw rod Supporting;Driving and driven screw rod 7 and 6 is intermeshed;What is be connected with driving screw rod 7 passes through gear for driving gear 2, driving gear 2 Set 2-2 is connected with driving screw rod 7, flat key 2-5 connections is used between geared sleeve 2-2 and driving screw rod 7, to prevent the axle of driving gear 2 To movement, bushing 2-1 and stripped nut 2-4 is axially set respectively;Driven screw 6 is connected by key 1-2 with driven gear 1, To prevent driven gear 1 from moving axially, bushing 1-1 and stripped nut 1-4 is axially set respectively.
As shown in fig. 6, the capacity new-type double screw pump of self-lubricating supporting, by upper half bearing body 9-3 and bottom half-bearing body 9-5 forms two integral bearings by joggle, and two integral bearings are placed in self-lubricating bearing positioner 9-1, by fixed Position device 9-1 provide support, prevents bearing from moving radially;Catch 9-7 is fixed on by positioner 9-1 by holding screw 9-2 On, prevent bearing from moving axially.Coordinate at self-lubricating bearing internal diameter and driving screw rod 7 and the middle part cooperation of driven screw 6 for gap, Self-lubricating bearing positioner outline 9-1 and the screw rod pump case 8 of combination, 10 interior grooves are engaged.Simultaneously in self-lubricating axle The both sides for holding positioner 9-1 are provided with the circulation that rectangular opening is easy to liquid.
When screw rod joggleword, the liquid for flowing through housing 8 is provided with square by self-lubricating bearing positioner 9-1 both sides Shape hole is diverted to the intracavitary of housing 10, and then liquid converges from both ends flows to output end.Simultaneously because moment of torsion and pressure during engagement It is easily deformed in the middle part of the effect screw rod of difference, to provide support in the middle part of screw rod after installation self-lubricating bearing device, can effectively reduces Deformation.
As shown in figure 1, the operation principle of the capacity new-type double screw pump of self-lubricating supporting is as follows:In Quimby pump body Varying pitch trapezoidal screw provided with two engagements, is engaged, screw rod is provided with single head thread, big spiral shell between screw rod periphery and pump chamber Away from being delivery outlet for input port, fine pitch one end, pump housing both ends are respectively equipped with Supporting cover, and the rotating shaft of screw rod is rotatably supported at In Supporting cover, an end cap is stretched out as power intake in the end of driving screw rod.During work, inputted from driving screw rod dynamic Power, driving gear transmits torque by the flat key between driving screw rod and geared sleeve, by tight between geared sleeve and driving gear Fixing bolt connection compresses, and driving gear engages with driven gear transmits torque, and driven gear passes through the key between driven screw Torque is transmitted, synchromesh gear drives driven screw with respect to backwards rotation, with the relative rotation of screw rod, in the input of big pitch Side constantly forms the cavity volume of closing, and cavity volume moves to the gas outlet that pitch tapers into.In moving process, due to pitch not Disconnected to reduce, the volume of unit cavity volume can be gradually reduced, cause pressure constantly to rise, can reach expected pressure value in delivery outlet.
Foregoing description is only the description to present pre-ferred embodiments, is not any restriction to the scope of the invention, this The modification that the technical staff of invention field is made according to the above, especially by groove depth, groove width or the spiral shell for changing screw slot Bar taper changes the volume of Quimby pump, belongs to the protection domain belonging to the present invention.

Claims (10)

1. the capacity new-type double screw pump of self-lubricating supporting, including Quimby pump housing;It is characterized in that:The Quimby pump Housing is connected and composed by left pump case (8) and right pump case (10), and the left pump case (8) is provided with medium input (14), The right pump case (10) is provided with medium output end (15), the left pump case (8) with inside right pump case (10) junction Provided with self-lubricating bearing device (9), the left pump case (8) is with running through the driving screw rod provided with varying pitch in right pump case (10) (7) match with driven screw (6), the outline and Quimby pump inner walls of the driving screw rod (7) and driven screw (6) Close, left pump case (8) end is connected with rear support lid (4), and the driving tooth being meshed is provided with the rear support lid (4) Take turns (2) and driven gear (1), the driving gear (2) acts on the driving screw rod (7) to be connected, the driven gear (1) and Driven screw (6) effect is connected, and the end face of the rear support lid (4) is provided with rear end cap (3), the right pump case (10) End is connected with front support lid (11), and the end face of the front support lid (11) is provided with drive end bearing bracket (12), the driving screw rod (7) Head stretch out the power intake of the drive end bearing bracket (12) as Quimby pump, the rear end cap (3), rear support lid (4), a left side Pump case (8), right pump case (10), front support lid (11) and drive end bearing bracket (12) form the cavity of closing by mechanical seal.
2. the capacity new-type double screw pump of self-lubricating supporting according to claim 1, it is characterised in that:The active spiral shell Bar (7) and driven screw (6) are all the single-head screws of uniform varying pitch, and tooth form is trapezoidal, and driving screw rod (7) is convex trapezoidal Tooth, driven screw (6) are recessed stepped tooth, and driving screw rod (7) is intermeshed with driven screw (6).
3. the capacity new-type double screw pump of self-lubricating supporting according to claim 1, it is characterised in that:The varying pitch Be driving screw rod (7) and driven screw (6) since fluid inlet end to the port of export, its pitch is descending progressively to be become Change, the change of pitch is a fixed value in a small amount, and the initial designs pitch for making screw spiral tooth form is p, and the pitch of each circle becomes a small amount of For d.
4. the capacity new-type double screw pump of self-lubricating supporting according to claim 1, it is characterised in that:The driving tooth Wheel (2) and driven gear (1) are Novikov gears with double circular arc tooth profiles, and the modulus of driving gear (2) and driven gear (1), the number of teeth are equal, are led Moving gear (2) is connected by geared sleeve (2-2) with driving screw rod (7), and geared sleeve (2-2) passes through flat key (2-5) and driving screw rod (7) connect.
5. the capacity new-type double screw pump of self-lubricating supporting according to claim 1, it is characterised in that:The driving tooth The axial direction of wheel (2) and driven gear (1) sets bushing (2-1) and stripped nut (2-4) respectively.
6. the capacity new-type double screw pump of self-lubricating supporting according to claim 1, it is characterised in that:The self-lubricating Bearing arrangement (9) is between left pump case (8) and right pump case (10), and embedded left pump case (8) and right pump case (10) It is interior;Self-lubricating bearing device (9) is by bearing positioning device (9-1), the active lubrication axle being arranged in bearing positioning device (9-1) Hold and driven lubrication bearing and catch (9-7) composition being connected with bearing positioning device (9-1);Self-lubricating bearing device (9) Both sides be provided with rectangular opening;Active lubrication bearing and driven lubrication bearing are by upper half bearing body (9-3) and bottom half-bearing body (9- 5) connected and composed by dovetail manner.
7. the capacity new-type double screw pump of self-lubricating supporting according to claim 6, it is characterised in that:The active profit The inwall of plain besring and driven lubrication bearing is equipped with circular arc tank, the bar number of tank 6.
8. the capacity new-type double screw pump of self-lubricating supporting according to claim 6, it is characterised in that:The active profit The bottom half-bearing body (9-5) of plain besring is flat, and the upper half bearing body (9-3) of driven lubrication bearing is flat, two half-and-half bearings The planar base surface of body contacts with each other to form support, to reduce the deformation in the middle part of screw rod.
9. the capacity new-type double screw pump of self-lubricating supporting according to claim 6, it is characterised in that:The upper semiaxis The material for holding body (9-3) and bottom half-bearing body (9-5) is ultra high molecular weight polyethylene material.
10. the capacity new-type double screw pump of self-lubricating supporting according to claim 1, it is characterised in that:The active The middle part of screw rod (7) and driven screw (6) is plain shaft structure, plain shaft structure and active lubrication bearing, driven lubrication axle The internal diameter held forms gap and coordinated.
CN201610292279.4A 2016-05-05 2016-05-05 The capacity new-type double screw pump of self-lubricating supporting Active CN105952636B (en)

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CN105952636B true CN105952636B (en) 2017-11-24

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CN107387401A (en) * 2017-08-10 2017-11-24 黄山市威格狮泵业有限公司 A kind of high pressure Quimby pump
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CN201526451U (en) * 2009-09-13 2010-07-14 王旭 Novel double-screw pump provided with threaded sleeves with unequal pitches
CN102182680A (en) * 2011-06-02 2011-09-14 重庆大学 Multi-stage speed changing screw pump
CN102220974A (en) * 2011-07-29 2011-10-19 四川省机械研究设计院 Double-screw pump without bearing
CN203308712U (en) * 2013-06-07 2013-11-27 淄博瑞莱特真空设备有限公司 Variable-pitch double-thread screw vacuum pump
CN205779670U (en) * 2016-05-06 2016-12-07 扬州大学 A kind of novel capacity Quimby pump

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Publication number Priority date Publication date Assignee Title
US5667370A (en) * 1994-08-22 1997-09-16 Kowel Precision Co., Ltd. Screw vacuum pump having a decreasing pitch for the screw members
CN1230242A (en) * 1996-09-12 1999-09-29 爱特里尔斯布时股份公司 Screw rotor set
CN201159172Y (en) * 2008-02-01 2008-12-03 梁伯顺 Improved structure of screw vacuum pump
CN201526451U (en) * 2009-09-13 2010-07-14 王旭 Novel double-screw pump provided with threaded sleeves with unequal pitches
CN102182680A (en) * 2011-06-02 2011-09-14 重庆大学 Multi-stage speed changing screw pump
CN102220974A (en) * 2011-07-29 2011-10-19 四川省机械研究设计院 Double-screw pump without bearing
CN203308712U (en) * 2013-06-07 2013-11-27 淄博瑞莱特真空设备有限公司 Variable-pitch double-thread screw vacuum pump
CN205779670U (en) * 2016-05-06 2016-12-07 扬州大学 A kind of novel capacity Quimby pump

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