CN105840494A - Single-shaft eccentric screw pump - Google Patents
Single-shaft eccentric screw pump Download PDFInfo
- Publication number
- CN105840494A CN105840494A CN201510890515.8A CN201510890515A CN105840494A CN 105840494 A CN105840494 A CN 105840494A CN 201510890515 A CN201510890515 A CN 201510890515A CN 105840494 A CN105840494 A CN 105840494A
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- China
- Prior art keywords
- stator
- rotor
- bellying
- screw pump
- eccentric screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
Abstract
The invention aims to provide a single-shaft eccentric screw pump in which reduction of pressurized transmission performance induced by posture deformation of a rotor due to the restoring force of a connecting member (i.e. the reaction force) can be inhibited to a minimum even when the connecting member with flexibility is used in a power transmitting mechanism portion. The single shaft eccentric screw pump (10) includes a rotor (30), a stator (20) having a through hole (22), and a power transmission mechanism (50). A power transmission mechanism (50) is provided with a connecting member (62) made of a flexible rod or the like. The through hole (22) is formed so as to form an oblong open area in a cross section across the axis of the stator (20). Besides, the stator (20) has a bulging portion extending inward in the width direction of the opening region at the middle portion in the longitudinal direction of the opening region.
Description
Technical field
The present invention relates to a kind of Uniaxial eccentric screw pump, in this Uniaxial eccentric screw pump, be used for
It is transferred to the rotary power inputted from driving source in the Poewr transmission mechanism portion of rotor use and has
Flexible connection member towards the direction intersected with rotor axis direction.
Background technology
It is provided with the Uniaxial eccentric screw pump disclosed in following patent documentation 1 at present such, at power
Transmission mechanism portion arranges flexibility bar (flexible rod) or flexible cord (flexible wire) etc. have
The Uniaxial eccentric screw pump of flexible connection member.In the Uniaxial eccentric screw pump of patent documentation 1,
It is configured to via connection member, the rotary power inputted from driving source is transferred to rotor.By
This, it is possible to make rotor in the way of the inner peripheral surface revolution of rotation one edge stator inside stator
Carry out eccentric rotary.
[prior art literature]
[patent documentation]
Patent documentation 1: JP Publication, JP No. 2012-154215 number
But, when using the connection members such as flexibility bar in Poewr transmission mechanism portion as mentioned above, by
The attitude of rotor is caused to deform in the restoring force (counteracting force) of connection member.With reference to figure
8 are the most specifically described as follows, it may be assumed that when making the rotor 120 that is connected with connection member 100
When inserting in stator 110 and rotate, the restoring force of connection member 100 acts on rotor 120.
Due to the effect of this restoring force, rotor 120 is intended to follow the connection members such as flexibility bar 100 and line up
The mode of straight line changes attitude.But, the movement of rotor 120 is limited by stator 110.Cause
This, rotor 120 will not become the attitude arranged in a line with connection member 100.
If here, the rigid body that stator 110 is metal etc., then rotor 120 does not moves but in Fig. 8
Attitude shown in (a).Specifically, even if because of the restoring force deforming generation of connection member 100
Having an effect, as long as stator 110 is rigid body, then the movement of rotor 120 is limited by stator 110 completely
System, therefore rotor 120 will not tilt relative to stator 110.
But, normally used stator 110 is made up of elastomers such as rubber, thus elasticity can occur
Deformation.Therefore, when the restoring force of connection member 100 acts on rotor 120, such as Fig. 8 (b)
Shown example is such, and rotor 120 becomes comparing with base end side (power source: right side in figure)
The attitude that front (left side in figure) sagging mode tilts.
Here, in Uniaxial eccentric screw pump, by making rotor 120 connect in line in stator 110
Touch, and formed in stator 110 and be provided as the space (cavity) that the fluid of pressurized delivered object passes through.
When the linear contact lay part (seal line) of the rotor 120 with stator 110 that form cavity occurs to interrupt,
Fluid is likely from being in the exhaust end of high pressure towards the suction side adverse current being in low pressure.It addition, work as
Rotor 120 carries out when the action that the most Utopian motion morphology departs from, it is more likely that meeting
Become the reduction of pressurized delivered performance or the reason of fluid pulsation.Therefore, at Uniaxial eccentric screw pump
In, the state making rotor 120 will not become tilting relative to stator 110 is discharge stable performance
The important topic of aspect.
But, when there is elastic deformation in stator 110, because of connection member 100 deformation produce
Restoring force makes the attitude of rotor 120 be changed as shown in Fig. 8 (b), it is possible to can occur
Above-mentioned seal line is interrupted or rotor 120 is carried out from the disengaging of the most Utopian motion morphology
The situation of action.Therefore, when using the connection members 100 such as flexibility bar in Poewr transmission mechanism portion,
It is likely to the problems such as the adverse current of fluid or fluid pulsation.
Summary of the invention
Therefore, it is an object of the invention to provide a kind of Uniaxial eccentric screw pump, at this single-axis eccentricity
In screw pump, even if using flexibility bar or flexible cord etc. to have the company of flexibility in Poewr transmission mechanism portion
In the case of relay part, it is also possible to the impact of the restoring force (counteracting force) because of connection member is led
The posture deforming of rotor caused and the reduction of the pressurized delivered performance thus caused or the arteries and veins of fluid
Dynamic suppression subthreshold.
Here, generally as shown in Fig. 8 (c)～Fig. 8 (e) etc., the thickness of stator be
Outside the length direction of the open area of through hole thin and thickening outside width.Therefore, by
In rotor in through hole with stator contact and from rotor to stator apply towards stator radial outside
The stator that caused of power be subject to counteracting force, the restoring force that i.e. acts on stator from connection member
The impact that rotor attitude is brought, less at the length direction both ends of the open area of through hole,
And become big at length direction pars intermedia.Based on such imagination, the present inventors draw following opinion:
As long as stator can be executed from rotor in the length direction intermediate portion supports of the open area of through hole
Add towards the power outside the width of open area, just can suppress the restoring force because of connection member
The posture deforming of the rotor that the impact of (counteracting force) is caused, and can be by pressurized delivered performance
Reduction or fluid pulsation suppression subthreshold.
The Uniaxial eccentric screw pump of the present invention provided based on above-mentioned opinion possesses: by pin thread type
Axis body constitute rotor, by having the bullet of female thread type through hole that can insert for described rotor
Stator that gonosome is constituted and for the rotary power inputted from driving source is transferred to described rotor
Poewr transmission mechanism portion；Described Poewr transmission mechanism portion has connection member, further, it is possible to make
Described rotor with while inside described stator stator described in rotation one edge inner peripheral surface revolution
Mode carries out eccentric rotary, and wherein, described connection member has towards the axis side with described rotor
Flexibility to the direction intersected；Described through hole is with on the cross section of the axis of transversal described stator
Constitute the mode opening of oblong open area；Length direction pars intermedia in described open area
The bellying bloated inside the width of described open area, is arranged on the axle of described stator
In at least some of region on line direction.
The Uniaxial eccentric screw pump of the present invention at least some of region on the axis direction of stator
In, bloat inside the width of the open area being provided with in stator set through hole
Bellying.By so constituting, it is possible to utilize bellying support from rotor stator is applied towards
Power outside through hole width.Thereby, it is possible to suppression (counter is made because of the restoring force of connection member
The posture deforming of the rotor caused by impact firmly), and can be by the reduction of pressurized delivered performance
Or the pulsation suppression subthreshold of fluid.
In the Uniaxial eccentric screw pump of the invention described above preferably: described connection member is by flexibility bar or soft
Line is constituted.
In the Uniaxial eccentric screw pump of the present invention, it is possible to the company that reason flexibility bar or flexible cord are constituted
The impact of the restoring force of relay part and the posture deforming suppression subthreshold of rotor that causes.By
This, it is possible to is by because of the reduction of the pressurized delivered performance caused by the posture deforming of rotor or the arteries and veins of fluid
Dynamic suppression subthreshold.
Here, the present inventors draw following opinion after having carried out wholwe-hearted research: when connection member
When restoring force acts on rotor, on the end (leading section) being positioned at the opposition side driving source,
Due to the rigidity of stator and the confined state of movement in rotor, before thus rotor easily becomes
End side is the state that fulcrum is sagging to base end part side.
The Uniaxial eccentric screw pump of the present invention provided based on above-mentioned opinion is configured to: described stator
There is the leading section of the base end part being positioned at described driving source and the opposition side being positioned at described driving source,
Described bellying is arranged in the region of described base end part side of described stator.
By so constituting, it is possible to rotor is become lateral base end part side, end is sagging in the past state,
This situation of state suppression subthreshold that i.e. rotor tilts relative to stator.Thereby, it is possible to carry
For the pulsation of the reduction of pressurized delivered performance or fluid can be suppressed the single-axis eccentricity of subthreshold
Screw pump.
Here, from the point of view of this viewpoint of attitude stabilization making rotor, the single-axis eccentricity of the invention described above
Screw pump can also be configured to the amount of bloating making bellying whole region on axis stator direction
Interior in generally uniform.But, in order to also be able to consider caused torque is set because of bellying
Increase or because of the problem such as increase of the rate of wear caused by the deterioration of lubrication property, preferably seek
The further optimization of the amount of bloating of bellying.
The present inventors draw following opinion after having carried out wholwe-hearted research based on above-mentioned opinion: by adopting
The a part of region being used on axis stator direction is not provided with the composition of bellying or reduces bellying
The amount of bloating, it is possible to obtain the raising effect of discharge performance or the inhibition of fluid pulsation, simultaneously
It also is able to the effects such as the reduction realizing the rate of wear.It addition, as it has been described above, work as the extensive of connection member
When multiple power acts on rotor, rotor easily becomes with the side, leading section of stator for fulcrum to base end part side
Sagging state.It is therefore preferable that the bellying amount of bloating is adjusted, so that the effect of bellying
Fruit is compared in the region of side, leading section, more can be embodied in the region of base end part side.
The Uniaxial eccentric screw pump of the present invention provided based on above-mentioned opinion is configured to: described stator
There is the leading section of the base end part being positioned at described driving source and the opposition side being positioned at described driving source,
The described bellying amount of bloating in described base end part side region is more than in described leading section side region
The interior amount of bloating.
By so constituting, it is possible to the impact of rotor attitude is suppressed by the restoring force of connection member in
Bottom line, and be obtained in that and prevent torque from increasing or reduce the effect such as the rate of wear.
It addition, the Uniaxial eccentric screw pump of the present invention provided based on same opinion is configured to:
Described stator has the base end part being positioned at described driving source and the opposition side being positioned at described driving source
Leading section, the amount of bloating of described bellying along with from side, described leading section towards described base end part side
And be gradually increased.
By so constituting, it is possible to the impact of rotor attitude is suppressed by the restoring force of connection member in
Bottom line.And then, it is possible to obtain raising or the inhibition of fluid pulsation of discharge performance, and
And the effect such as the reducing effect that can also obtain the rate of wear.
(invention effect)
In accordance with the invention it is possible to provide following Uniaxial eccentric screw pump, at this single-axis eccentricity screw rod
In pump, even if using flexibility bar or flexible cord etc. to have the connecting portion of flexibility in Poewr transmission mechanism portion
In the case of part, it is also possible to the impact of the restoring force (counteracting force) because of connection member is caused
The posture deforming of rotor and the reduction of pressurized delivered performance thus caused or the pulsation of fluid
Suppression subthreshold.
Accompanying drawing explanation
Fig. 1 is the sectional view of the Uniaxial eccentric screw pump that an embodiment of the present invention relates to.
(a) in Fig. 2 is the front view of the example representing stator, and (b) is left side view, (c)
Being A1-A1 sectional view, (d) is right side view；Rearview, top view and upward view and front view
Identical, therefore omit diagram.
(a) in Fig. 3 is the B-B sectional view of Fig. 2 (c), and (b) is the C-C of Fig. 2 (c)
Sectional view.
Rotor and the attitude of connection member when Fig. 4 is the Uniaxial eccentric screw pump work about Fig. 1
Explanatory diagram.
(a) in Fig. 5 is the front view of the first variation representing stator, and (b) is left side view,
C () is A2-A2 sectional view, (d) is right side view；Rearview, top view and upward view with
Front view is identical, therefore omits diagram.
(a) in Fig. 6 is the front view of the second variation representing stator, and (b) is left side view,
C () is A3-A3 sectional view, (d) is right side view；Rearview, top view and upward view with
Front view is identical, therefore omits diagram.
(a) in Fig. 7 is the front view of the 3rd variation representing stator, and (b) is left side view,
C () is A4-A4 sectional view, (d) is right side view；Rearview, top view and upward view with
Front view is identical, therefore omits diagram.
(a) in Fig. 8 be relevant stator be the explanation of the attitude of rotor during rigid body and connection member
Figure, (b) is about prior art lower rotor part and the explanatory diagram of the attitude of connection member, and (c) is (b)
Left side view, (d) is the P-P sectional view of (b), and (e) is the right side view of (b).
(symbol description)
10... Uniaxial eccentric screw pump
20... stator
20x... leading section
20y... base end part
22... through hole
22e, 22f... bellying
22g... open area
30... rotor
50... Poewr transmission mechanism portion
62... connection member
Detailed description of the invention
Hereinafter, referring to the drawings the Uniaxial eccentric screw pump 10 of an embodiment of the present invention is carried out in detail
Describe in detail bright.
Uniaxial eccentric screw pump 10 is so-called rotary displacement type pump.As it is shown in figure 1, single shaft is inclined
Heart screw pump 10 is configured to: assembled in stator 20, rotor 30, Poewr transmission mechanism portion 50 etc.
In housing 12.Housing 12 is metal cartridge.Length direction one end of housing 12
The end component 12a of tubular is installed on side.End component 12a is provided with the first opening 14a.Separately
Outward, the outer peripheral portion of housing 12 is provided with the second opening 14b.Second opening 14b is being positioned at shell
At the pars intermedia 12d of the length direction mid portion of body 12, the inner space with housing 12 connects.
First opening 14a and the second opening 14b is the suction as Uniaxial eccentric screw pump 10 respectively
The part that mouth or discharge opening play a role.Further describe as follows, it may be assumed that in present embodiment
Uniaxial eccentric screw pump 10 in, by making rotor 30 forward rotation, it is possible to so that first opens
The mouth mode that 14a plays a role as discharge opening, the second opening 14b plays a role as suction inlet adds
Pressure conveyance fluid (fluid).It addition, in contrast to this, in Uniaxial eccentric screw pump 10, logical
Cross and make rotor 30 reverse rotation, it is possible to so that the first opening 14a plays a role as suction inlet,
The mode pressurized delivered fluid that second opening 14b plays a role as discharge opening.
Stator 20 is made up of the elastomer with rubber as representative or resin etc..About stator 20, except
Outside columnar stator, additionally it is possible to Usage profile shape is polygonal tubular stator.In this reality
Execute in mode, as in figure 2 it is shown, use generally cylindrical the determining of face shaping as stator 20
Son.The material of stator 20 can be according to the i.e. fluid of the conveying object of Uniaxial eccentric screw pump 10
Kind or characteristic etc. suitably select.
As it is shown in figure 1, stator 20 is arranged on and end component 12a adjoining position.Such as Fig. 3
Shown in, stator 20 is configured to be configured with inner core 20t in the inner side of the urceolus 20s of general cylindrical shape.
It is provided with in the end of inner core 20t and is radially oriented protuberance 21 protruding outside.Protuberance 21 phase
End than urceolus 20s highlights more towards the length direction of stator 20, and with the length of stator 20
The end abutment in degree direction.Inner core 20t is formed as near end real at set spot-facing portion 23
Execute the shape (counterbored shape) that spot-facing processes.It addition, in the present embodiment, example
It is shown in stator 20 and is provided with the example in spot-facing portion 23, but stator 20 can also be not necessarily to
Spot-facing portion 23 is set.
Stator 20 is fixed in the following way, it may be assumed that at the end position of housing 12, profit
With end component 12a and housing 12, the protuberance 21 at two ends is clamped, and spiral shell will be supported
Bolt 16 is arranged between end component 12a and housing 12 and is fastened, thus by stator 20
Fixed.
It addition, to be formed for for described later in the way of axis direction extension in stator 20
The through hole 22 that rotor 30 is inserted.Through hole 22 is formed as n bar single-stage or multistage female thread shape
Shape.In the present embodiment, through hole 22 is formed as two multistage female thread shapes.Such as Fig. 2
Shown in, through hole 22 has when any position section view of length direction (axis direction) equal
In roughly the same section shape.The section shape of through hole 22 and the opening shape of end are formed
For following shape, it may be assumed that towards a direction (hereinafter also referred to as " H direction ") length than towards
The Long Circle of the length length in the direction (hereinafter also referred to as " B direction ") intersected with H direction.
As in figure 2 it is shown, through hole 22 is oval to be constituted on the cross section of transversal stator 20 axis
The mode opening of the open area 22g of shape.Further describe as follows, it may be assumed that through hole 22
Section shape in having bending section 22a, the 22b bending to arc-shaped in the both end sides in H direction
And by the shape of pars intermedia 22c, 22d of connection between bending section 22a, 22b.
It addition, pars intermedia 22c, 22d are provided with bellying 22e, 22f (in present embodiment being
Between the substantially central portion of portion 22c, 22d).Bellying 22e, 22f are respectively to open area 22g's
Inner side bloats.Further specifically, bellying 22e, 22f is respectively to the width of through hole 22
The inner side in direction bloats.In the present embodiment, bellying 22e, 22f is formed from a portion
The both ends of 22c, 22d gently bend to substantially central portion, and substantially central portion the most to
The inner side of open area 22g highlights.Thus, open area 22g is at pars intermedia 22c, 22d
Substantially central portion be formed with shape as the so-called calabash of necking section.
It addition, bellying 22e, 22f be arranged on the axis direction of stator 20 at least some of
In region.In the present embodiment, bellying 22e, 22f is arranged on the axis direction of stator 20
On the most whole region in.
The amount of bloating that bellying 22e, 22f bloat towards the inner side of open area 22g, can be fixed
Optional position (region) place on son 20 axis directions is all in identical, it is also possible to make according to position
The amount of bloating is different.Specifically, bellying 22e, 22f preferably in stator 20 than leading section
20x side is preferentially arranged in the region of base end part 20y side.In the present embodiment, bellying 22e,
22f is formed as the amount of bloating in base end part 20y side region more than in the 20x side region of leading section
The amount of bloating.
Specifically, as shown in dotted line in Fig. 2 (d), it is arranged on the bellying of 20x side, leading section
22e, 22f are in the shape bloated inside the 22g of open area.In contrast, as in Fig. 2 (d)
Shown in solid, bellying 22e, 22f of being arranged on base end part 20y side are arranged on leading section in ratio
The shape that bellying 22e, 22f of 20x side bloats further inside the 22g of open area.It addition,
The amount of bloating of bellying 22e, 22f be adjusted to along with from 20x side, leading section towards base end part 20y side
And be gradually increased.
As it is shown in figure 1, rotor 30 is the axis body being inserted through in the through hole 22 of stator 20.Rotor
30 are formed by raw materials such as metal, resin or potteries, and in n-1 bar single-stage or multistage positive spiral shell
Stricture of vagina shape.In the present embodiment, rotor 30 is formed as a multistage pin thread shape.Rotor
30 is the axis body being connected with the connection member 62 described in detail afterwards.Rotor 30 is via connection member
Eccentric rotary is carried out under the driving of the power that 62 transmission come.
Further specifically, rotor 30 carries out rotation and along stator 20 in the inner side of stator 20
Constitute through hole 22 inner peripheral surface 24 revolve round the sun.Rotor 30 is formed as in the longitudinal direction
Any position section view time its section shape all in substantially circular.Rotor 30 is inserted through above-mentioned
In the through hole 22 formed on stator 20, and can in the inside of through hole 22 freely
Eccentric rotary.
When being inserted in stator 20 by rotor 30, become outer peripheral face 32 and the stator of rotor 30
The state that the inner peripheral surface 24 of 20 abuts with both tangent lines.It addition, in this condition, formed
Fluid is formed defeated between inner peripheral surface 24 and the outer peripheral face 32 of rotor 30 of the stator 20 of through hole 22
Send road 40.When length L of the helical pitch (lead) of said stator 20 is set to datum length S,
Fluid transport road 40 is d times of the datum length S on the axis direction of stator 20 with helical pitch
Multistage (d level) runner of length.
Fluid transport road 40 spirally extends along the length direction of stator 20 or rotor 30.
It addition, when making rotor 30 rotate in the through hole 22 of stator 20, fluid transport road 40 1
While rotate in stator 20 on one side along the length direction advance of stator 20.Therefore, when making rotor
During 30 rotation, it is possible to draw fluid in fluid transport road 40 from the end side of stator 20, and,
This fluid is carried towards another side of stator 20 with the state that is enclosed in fluid transport road 40
And spue in another side of stator 20.That is, when making rotor 30 forward rotation, it is possible to will
The fluid sucked from the second opening 14b carries out pressurized delivered and spues from the first opening 14a.It addition,
When making rotor 30 reverse rotation, it is possible to the fluid sucked from the first opening 14a is opened from second
Mouth 14b spues.
Poewr transmission mechanism portion 50 is in order to from driving sources such as the motor being arranged at outside housing 12
(not shown) transmits power to above-mentioned rotor 30 and arranges.Poewr transmission mechanism portion 50 has
Power connection 52 and eccentric rotary portion 54.Power connection 52 is arranged in the 12c of axle resettlement section,
This axle resettlement section 12c is arranged on the end side of the length direction of housing 12, is further specifically
It is provided with the opposition side (following, also referred to as " base end side ") of said stator 20 side.It addition, partially
Heart rotating part 54 is arranged on the pars intermedia 12d being formed between axle resettlement section 12c and stator 20.
Power connection 52 has drive shaft 56, and this drive shaft 56 is propped up by two bearings 58a, 58b
Support is for rotating freely.Drive shaft 56 is stretched from the inaccessible portion faces outward of housing 12 base end side
Go out and be connected with power source.Therefore, by making power source be driven, it is possible to make drive shaft 56 revolve
Turn.It is being provided with between the axle resettlement section 12c of power connection 52 and pars intermedia 12d, is being provided with such as
The gland seal device 60 being made up of mechanical sealing member or gland packing etc., thus, is formed as defeated
The fluid sending object will not be from pars intermedia 12d side leakage to the structure of 12c side, axle resettlement section.
Eccentric rotary portion 54 be by connection member 62 by above-mentioned drive shaft 56 with rotor 30 with energy
Enough transmit the part that the mode of power is connected.Connection member 62 is threaded connection or hot jacket is joined
The methods of attachment such as conjunction and be connected with drive shaft 56 and rotor 30.About connection member 62, if tool
There is the flexibility towards the direction intersected with rotor 30 axis direction, just can be any parts.Tool
For body, connection member 62 can use flexibility bar or flexible cord.In the present embodiment, connect
Parts 62 use flexibility bar.Thus, eccentric rotary portion 54 can will transmit via drive shaft 56
Rotary power be transferred to rotor 30, so that rotor 30 carries out eccentric rotary.
In above-mentioned Uniaxial eccentric screw pump 10, by making the driving source being made up of motor etc. drive
And make rotor 30 forward rotation such that it is able to fluid forward end is sucked from base end part 20y side
20x side, portion this fluid of pressurized delivered, and from the first opening 14a being arranged at end component 12a
Spue this fluid.Here, as it has been described above, in Uniaxial eccentric screw pump 10, stator 20 sets
There are bellying 22e, 22f.Bellying 22e, 22f are in the length of the open area 22g of through hole 22
Degree direction pars intermedia bloats inside width.By arranging such bellying 22e, 22f,
The restoring force putting on stator 20 from connection member 62 can be supported by bellying 22e, 22f, from
And the posture deforming (with reference to Fig. 4) of rotor 30 can be suppressed.Therefore, at Uniaxial eccentric screw pump
In 10, it is possible to by the reduction of pressurized delivered performance caused because of the restoring force of connection member 62 or stream
The pulsation suppression subthreshold of body.
In above-mentioned Uniaxial eccentric screw pump 10, as long as connection member 62 have towards with rotor
The flexibility in the direction that 30 axis directions intersect, just can be any parts, it is possible to suitably with example
Such as flexibility bar or flexible cord etc..It addition, in addition to flexibility bar etc., it is also possible to by so-called flexible shaft coupling
Device is such, have the flexure allowed towards the direction intersected with axis direction and can suppress to enclose
The shaft couplings of the characteristic of the torsional deformation on axis direction etc. are as connection member 62.
It addition, in above-mentioned Uniaxial eccentric screw pump 10, bellying 22e set on stator 20,
The 22f amount of bloating in base end part 20y side region is more than bloating in the 20x side region of leading section
Amount.By so constituting, it is possible to by the restoring force of connection member 62 shadow to the attitude of rotor 30
Ring suppression subthreshold, and also be able to prevent because arranging the fraud that bellying 22e, 22f are brought
End.
That is, in Uniaxial eccentric screw pump 10, it is contemplated that problems with and according to bellying 22e,
The amount of bloating of 22f position adjustment bellying 22e, 22f on stator 20 axis direction, this problem
Refer to: due to the impact of the restoring force of connection member 62, and there is rotor 30 easily in stator
The 20x side, leading section of 20 be fulcrum state this tendency sagging towards base end part 20y side and
Because arranging the torque that bellying 22e, 22f brought and increasing, because of caused by the deterioration of lubrication property
The problems such as rate of wear increase.Therefore, in Uniaxial eccentric screw pump 10, not only inhibit because of
The problems such as the reduction of the pressurized delivered performance caused by the restoring force of connection member 62 or fluid pulsation,
But also it is obtained in that the effects such as the rate of wear of reduction stator 20.
It addition, in the stator 20 shown in present embodiment, the amount of bloating of bellying 22e, 22f
Along with being gradually increased towards base end part 20y side from 20x side, leading section.Therefore, no matter with stator
Who on 20 axis directions is set to benchmark, and bellying 22e, 22f that stator 20 is arranged exist
The amount of bloating in base end part 20y side region is both greater than the amount of bloating in the 20x side region of leading section.
But, the present invention is not limited to this, such as, can also be formed as: with stator 20 axis side
On the basis of assigned position upwards, by bellying 22e, 22f drum in the 20x side region of leading section
Output is set as fixed amount α, and, on the basis of described assigned position, by bellying 22e, 22f
When the amount of bloating in base end part 20y side region is set as fixed amount β, set up the relation of α ＜ β.
That is, the amount of bloating of bellying 22e, 22f is not limited to as shown in the embodiment in non-steps
(stepless) change, it is also possible to change in steps.It addition, with assigned position as base
Standard, when 20x side, leading section and base end part 20y side change the amount of bloating of bellying 22e, 22f,
Preferably suitably adjusting according to conditions such as the fluidity of handled fluid or pressure makes the amount of bloating occur
The position of change or variable quantity.
It addition, in the present embodiment, exemplify along with from 20x side, leading section towards base end part 20y
Side and make the amount of bloating of bellying 22e, 22f be gradually increased, thus make bellying 22e, 22f exist
The amount of bloating in base end part 20y side region bigger than the amount of bloating in the 20x side region of leading section this
One example, but the present invention is not limited to this.
Specifically, it is possible to so that the amount of bloating of bellying 22e, 22f is along with from 20x side, leading section
Increase in steps (discontinuously) in each region towards base end part 20y side.It addition,
Without considering owing to the caused torque that arranges of bellying 22e, 22f increases, due to lubrication spy
During the problems etc. such as the rate of wear increase caused by deterioration of property, it is also possible to be formed as making bellying
In generally uniform in the amount of bloating of 22e, 22f whole region on stator 20 axis direction.
It addition, above-mentioned bellying 22e, 22f are formed as following shape, it may be assumed that along with from pars intermedia
The both ends of 22c, 22d are gradually prominent to the inner side of open area 22g towards substantially central portion
Substantially chevron shape, but the present invention is not limited to this.That is, as long as bellying 22e, 22f is respectively
In the shape that pars intermedia 22c, 22d bloat towards the inner side of open area 22g.
Specifically, as it is shown in figure 5, bellying 22e, 22f can also be at pars intermedia 22c, 22d
Substantially central portion protrude semicircle towards the inner side of open area 22g.It addition, such as Fig. 6 institute
Showing, bellying 22e, 22f can also be from the both end sides of pars intermedia 22c, 22d towards substantial middle
Portion highlights substantially uniform amount.Even if bellying 22e, 22f are the shape shown in Fig. 5 or Fig. 6,
As long as bellying 22e, 22f can supporting role in the restoring force of the connection member 62 of stator 20,
Just it also is able to suppress the posture deforming of rotor 30, and the pressurized delivered performance that will cause because of restoring force
Reduction or fluid pulsation suppression subthreshold.
It addition, in the present embodiment, exemplify bellying 22e, 22f be arranged on pars intermedia 22c,
The example of the substantially central portion of 22d, but bellying 22e, 22f can also be arranged on pars intermedia
The position of the deviation substantially central portion of 22c, 22d.
It addition, as long as the section shape of through hole 22 is Long Circle, then said stator 20 can be
Arbitrary shape.That is, the section shape of through hole 22 is not limited to utilize in linearly extension
Between portion 22c, 22d will between circular arc like curvature 22a, 22b arranged opposite connect runway
(track) (circle road) shape, it is also possible to be the shapes such as gold coin shape the most oval, oval.Enter one
Walk specifically, as it is shown in fig. 7, stator 20 can also be to set in oval through hole 22
It is equipped with the parts etc. of bellying 22e, 22f.In the case of such composition, it is also possible to by profit
With bellying 22e, 22f supporting role in the restoring force of the connection member 62 of stator 20, thus press down
The posture deforming of rotor 30 processed, and the reduction of pressurized delivered performance or the pulsation of fluid are suppressed in
Bottom line.
(industrial utilizability)
The present invention can be applicable to all following Uniaxial eccentric screw pumps, it may be assumed that for will be from
Driving source input rotary power be transferred in the Poewr transmission mechanism portion of rotor use have towards
All single shafts of flexible this type of connection member in the direction intersected with rotor axis direction are inclined
Heart screw pump.
Claims (5)
1. a Uniaxial eccentric screw pump, it is characterised in that
Possess:
Rotor, it is made up of the axis body of pin thread type,
Stator, it is by the elastomer of the through hole with the female thread type that described rotor can be supplied to insert
Constitute, and
Poewr transmission mechanism portion, it for being transferred to described turning by the rotary power inputted from driving source
Son；
Described Poewr transmission mechanism portion has connection member, further, it is possible to make described rotor with
The mode revolved round the sun at the inner peripheral surface of stator described in inner side rotation one edge of described stator carries out bias
Rotating, wherein, described connection member has the direction intersected towards the axis direction with described rotor
Flexibility；
Described through hole is to be constituted oblong opening on the cross section of the axis of transversal described stator
The mode opening of port area；
Length direction pars intermedia in described open area is towards the width of described open area
The bellying that inner side bloats, at least some of region being arranged on the axis direction of described stator
In.
2. Uniaxial eccentric screw pump as claimed in claim 1, it is characterised in that
Described connection member is flexibility bar or flexible cord.
3. Uniaxial eccentric screw pump as claimed in claim 1 or 2, it is characterised in that
Described stator has the base end part being positioned at described driving source and the phase being positioned at described driving source
The leading section tossed about；
Described bellying is arranged in the region of described base end part side of described stator.
4. the Uniaxial eccentric screw pump as described in any one in claims 1 to 3, it is characterised in that
Described stator has the base end part being positioned at described driving source and the phase being positioned at described driving source
The leading section tossed about；
The described bellying amount of bloating in described base end part side region is more than in side, described leading section
The amount of bloating in region.
5. the Uniaxial eccentric screw pump as described in any one in Claims 1 to 4, it is characterised in that
Described stator has the base end part being positioned at described driving source and the phase being positioned at described driving source
The leading section tossed about；
The amount of bloating of described bellying along with from side, described leading section towards described base end part side by
Cumulative greatly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-019036 | 2015-02-03 | ||
| JP2015019036A JP6761980B2 (en) | 2015-02-03 | 2015-02-03 | Uniaxial eccentric screw pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105840494A true CN105840494A (en) | 2016-08-10 |
| CN105840494B CN105840494B (en) | 2021-06-22 |
Family
ID=56568413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510890515.8A Active CN105840494B (en) | 2015-02-03 | 2015-12-04 | Single-shaft eccentric screw pump |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6761980B2 (en) |
| KR (1) | KR102439444B1 (en) |
| CN (1) | CN105840494B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075710A (en) * | 2019-12-25 | 2020-04-28 | 白坤 | 3 compare 4 equal wall thickness screw pump rubber lining structures |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6761980B2 (en) * | 2015-02-03 | 2020-09-30 | 兵神装備株式会社 | Uniaxial eccentric screw pump |
| JP7138383B1 (en) | 2022-01-18 | 2022-09-16 | 兵神装備株式会社 | Uniaxial eccentric screw pump |
| JP7138382B1 (en) * | 2022-01-18 | 2022-09-16 | 兵神装備株式会社 | Uniaxial eccentric screw pump |
| JP7199128B1 (en) * | 2022-01-18 | 2023-01-05 | 兵神装備株式会社 | Uniaxial eccentric screw pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397619A (en) * | 1979-03-14 | 1983-08-09 | Orszagos Koolaj Es Gazipari Troszt | Hydraulic drilling motor with rotary internally and externally threaded members |
| GB2272730A (en) * | 1992-11-11 | 1994-05-25 | Arnold Jaeger | Eccentric screw pump |
| CN201843778U (en) * | 2010-11-04 | 2011-05-25 | 韩全伟 | Iso-wall-thickness rubber stator screw pump |
| JP2012154215A (en) * | 2011-01-25 | 2012-08-16 | Heishin Engineering & Equipment Co Ltd | Single-shaft eccentric screw pump |
| JP2016142188A (en) * | 2015-02-03 | 2016-08-08 | 兵神装備株式会社 | Uniaxial eccentric screw pump |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4086270B2 (en) * | 2000-11-13 | 2008-05-14 | 株式会社リコー | Powder pump and image forming apparatus having the powder pump |
| DE10243675B3 (en) * | 2002-09-20 | 2004-01-29 | Netzsch-Mohnopumpen Gmbh | Eccentric screw pump with exchange unit |
-
2015
- 2015-02-03 JP JP2015019036A patent/JP6761980B2/en active Active
- 2015-12-04 CN CN201510890515.8A patent/CN105840494B/en active Active
-
2016
- 2016-02-02 KR KR1020160012741A patent/KR102439444B1/en active IP Right Grant
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397619A (en) * | 1979-03-14 | 1983-08-09 | Orszagos Koolaj Es Gazipari Troszt | Hydraulic drilling motor with rotary internally and externally threaded members |
| GB2272730A (en) * | 1992-11-11 | 1994-05-25 | Arnold Jaeger | Eccentric screw pump |
| DE4237966A1 (en) * | 1992-11-11 | 1994-05-26 | Arnold Jaeger | Eccentric screw pump |
| CN201843778U (en) * | 2010-11-04 | 2011-05-25 | 韩全伟 | Iso-wall-thickness rubber stator screw pump |
| JP2012154215A (en) * | 2011-01-25 | 2012-08-16 | Heishin Engineering & Equipment Co Ltd | Single-shaft eccentric screw pump |
| JP2016142188A (en) * | 2015-02-03 | 2016-08-08 | 兵神装備株式会社 | Uniaxial eccentric screw pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075710A (en) * | 2019-12-25 | 2020-04-28 | 白坤 | 3 compare 4 equal wall thickness screw pump rubber lining structures |
| CN111075710B (en) * | 2019-12-25 | 2021-11-26 | 黄山黄泵单螺杆泵有限公司 | 3-to-4-equal-wall-thickness single-screw pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6761980B2 (en) | 2020-09-30 |
| KR20160095632A (en) | 2016-08-11 |
| KR102439444B1 (en) | 2022-09-02 |
| JP2016142188A (en) | 2016-08-08 |
| CN105840494B (en) | 2021-06-22 |
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