CN208605317U - A kind of precision plunger pump - Google Patents
A kind of precision plunger pump Download PDFInfo
- Publication number
- CN208605317U CN208605317U CN201820855463.XU CN201820855463U CN208605317U CN 208605317 U CN208605317 U CN 208605317U CN 201820855463 U CN201820855463 U CN 201820855463U CN 208605317 U CN208605317 U CN 208605317U
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- Prior art keywords
- sealing ring
- piston
- pump
- pump chamber
- pump housing
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Abstract
The utility model discloses a kind of precision plunger pumps for handling micro fluid, it is made of perforation shaft type linear stepping motor, guidance set, piston, the pump housing, seal assembly, position sensing component and substrate, penetrates through the straight reciprocating motion needed for opposing seal component slippage, realization plunger pump along lead screw length direction linear motion, in pump housing under the action of guidance set limitation lead screw rotates of shaft type linear stepping motor driving piston.The utility model structure is simple, cost is relatively low, compact dimensions.
Description
Technical field
It can be used for Life Science Instruments, in-vitro diagnosis equipment and field of analytic instrument the present invention relates to one kind and be used to accurate behaviour
Make the precision plunger pump of micro liquid.
Background technique
In Life Science Instruments, in-vitro diagnosis equipment and field of analytic instrument, have many instruments need accurately to obtain it is micro-
Quantity of fluid (including sample and reagent), liquid volume is from several microlitres to several milliliters.There are many pumps can satisfy the different behaviour of precision
Make, be such as suitable for the general peristaltic pump of continuous feed liquid, precision, is suitable for setting the diaphragm pump and expanded letter of volume of liquid operation
Product range, highly accurate micro-injection pump or precision plunger pump.
Syringe pump is made of stepper motor, linear reciprocation drive mechanism, bracket and syringe etc., and common linear reciprocation passes
Dynamic structure is the transmission of lead screw and feed screw nut composition.Feed screw nut is connected with the piston of syringe, and liquid is held in syringe
Body realizes the liquid transmission of high-precision, steady pulse free.The Carvo injection series pump of Tecan company exploitation is answered in above-mentioned field
With very extensive.Syringe is replaceable, or even is replaced by the syringe of different volumes, is convenient for research project.This pump
Common issue is the restricted lifetime of syringe, needs to regularly replace syringe；And it is led since syringe is generally used lead screw
Structure, the cost of rail are more expensive.
The integrated level of precision plunger pump is higher, and the structure for playing syringe pump chamber and piston function or component are integrated into
In the pump housing.Advantage is that pump housing volume is substantially reduced, and the piston seal cooperation service life greatly improves, the disadvantage is that the capacity of pump is fixed.But
It is for the instrument product of batch production, the capacity requirement of each pump is fixed.Sapphire company, the U.S. and the U.S.
LEE Company company all produces this precision plunger pump.The transmission mechanism of these pumps is all by a stepper motor and stepping
Lead screw, a feed screw nut and its guiding parts that motor shaft is connected, piston, a pump chamber, sensing being fixed on nut
Device and sealing ring composition.The shortcomings that this structure is that assembling process is cumbersome, and the size of the pump housing is larger.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of new precision plunger pump, mainly use improvement structure with
Simplify and installs and make full use of space to reduce the size of pump.
Purpose is appealed to realize, the invention adopts the following technical scheme:
On the basis of precision plunger pumps existing general technology scheme, using perforation shaft type linear stepping motor and guidance set
Straight reciprocating motion needed for plunger pump is realized in cooperation, precision plunger are pumped by perforation shaft type linear stepping motor, piston, guiding group
Part, the pump housing, seal assembly, position sensing component and substrate composition.
Perforation shaft type linear stepping motor is made of stepper motor, lead screw, feed screw nut, and wherein feed screw nut is integrated in step
On into the hollow rotor of motor, feed screw nut rotation is driven when stepper motor rotation, in the case where limiting lead screw rotation, stepping
Feed screw nut rotation drives lead screw to move along a straight line along lead screw length direction when motor works.
Precision plunger pump each component connection relationship include: (1) will penetrate through shaft type linear stepping motor lead screw and piston
It is connected directly to form movement shafting.(2) the movement shafting is supported by the seal assembly matched with piston.(3) on the pump housing
There is pump chamber, piston and pump chamber are concentric.(4) one or more pilot holes parallel with piston are processed on the pump housing as kinematic axis
The guide frame of system, accordingly on piston side by side the one or more slide bars parallel with piston axis of connection as guide part,
The inner surface of pilot hole is as guide surface；The pump housing can also be used or penetrate through one of shaft type motor and parallel with piston axis put down
The guide surface of face or curved surface as axis of movement, accordingly on piston it is placed side by side one or more guide runners as guiding
Part, the guide runner have one side and the guide surface to be overlapped；The guide part and guide surface form guidance set, so that movement
The movement of shafting is the linear motion moved along piston axes direction.(5) there is seal assembly in the intracorporal pump chamber of pump, seal
Component is made of seal ring assembly and compact heap, and seal ring assembly is on the stepped hole in the pump chamber, and is pushed down with compact heap close
Ring assemblies realize the sealing of seal assembly and pump chamber, seal assembly and piston space；Seal ring assembly can be by sealing ring and attached
Belong to sealing ring composition, between sealing ring and pump chamber, secondary sealant circle is used to realize between sealing ring and pump chamber secondary sealant circle
Sealing, sealing ring is used to realize sealing between sealing ring and piston；Seal ring assembly is also possible to a part, only has
Sealing ring, and the sealing between sealing ring and pump chamber and the sealing of piston space are realized simultaneously, so that each outlet of pump chamber blocked
When, the space between pump chamber and piston form an airtight cavity.(6) position sensing component can be optoelectronic switch and photoelectricity
Gear shaft, optoelectronic switch are mounted on the pump housing, linear stepping motor or substrate, and photoelectricity gear shaft is mounted on the silk of linear stepping motor
On thick stick or piston；Position sensing combination is also possible to Hall switch or position coder, is mounted on linear stepping motor；
Position sensor combination is also possible to travel switch, is mounted on the pump housing, substrate or linear stepping motor, and in straight line stepping
Travel switch is installed on the projecting shaft or piston of motor and touches part.(7) pump housing and motor are all installed on substrate；Or the pump housing
The a part i.e. pump housing, the pump housing is made into substrate to be connected with motor.(8) linear stepping motor drives piston, in guidance set
Positioning under opposing seal component slippage, move along a straight line in pump chamber, when piston moves along a straight line along and into pump housing direction, pump chamber
Interior generation positive pressure, piston generate negative pressure along when leaving pump housing direction linear motion, in pump chamber.(8) be provided on the pump housing one or
The more than one hole being connected to pump chamber.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The drawings and examples of offer obtain other embodiments.
Fig. 1 is the overall structure diagram of the pump of precision plunger provided by one embodiment of the invention；
Fig. 2 is the overall structure diagram of the pump of precision plunger provided by another embodiment of the present invention, and Fig. 3 is the implementation
The schematic diagram of example guidance set；
Fig. 4 A, 4B are a kind of structural schematic diagram of seal assembly provided by the embodiment of the present invention, and Fig. 4 C, 4D and 4E are this
The structural schematic diagram of other three kinds of seal assemblies provided by inventive embodiments.
Wherein, appended drawing reference is stepper motor, the 102- that 1- penetrates through shaft type linear stepping motor, 101- embeds feed screw nut
Lead screw, 2- sealing ring, 3- secondary sealant circle, 4- compact heap, 5- piston, the 6- pump housing, 7- substrate, 8- guidance set, 801- guiding
Part, 802- guide surface, 9- photoelectricity gear shaft, 10- optoelectronic switch.
Specific embodiment
There is provided a kind of new precision plunger pumps for core of the invention, mainly use improvement structure with simplified installation, simultaneously
Space is made full use of to reduce the size of pump.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention is cooperated using the perforation shaft type linear stepping motor 1 and guidance set 8, is realized straight needed for plunger pump
Line moves back and forth.The shaft type linear stepping motor 1 that penetrates through is by 102 groups of stepper motor 101, the lead screw of embedded nut on rotor
At.The guidance set 8 limits the lead screw 102 and rotates so that when the stepper motor 101 rotates, the lead screw 102 along
102 length direction of the lead screw linear motion.
Shown in FIG. 1 is one embodiment of the present of invention, and precision plunger pump includes by perforation shaft type linear stepping motor 1(
Stepper motor 101, the lead screw 102 of embedded nut on rotor), seal assembly (including sealing ring 2, secondary sealant circle 3 and compact heap
4), piston 5, the pump housing 6, substrate 7, guidance set 8(include slider guide part 801 and guide surface 802) and position sensing component (packet
Include photoelectricity gear shaft 9 and optoelectronic switch 10) composition.The connection relationship of each component includes: the perforation shaft type linear stepping motor 1
The lead screw 102 and the piston 5 are connected directly and guidance set 8 forms linear motion shafting；The guide surface 802 can be with
It is plane or curved surface parallel with 102 axis of lead screw on the pump housing 6 or the substrate 7, the stepper motor 101 rotates
When, but the slider guide part 8 limit the lead screw 102 as embedded nut described on the motor 101 rotates, so that institute
Lead screw 102 is stated to transport along the guide surface 802 parallel with 102 axis of lead screw, in the 102 axis direction straight line of lead screw
It is dynamic；The perforation shaft type linear stepping motor 1 and the pump housing 6 are fitted together by the substrate 7, the pump housing 6 and institute
Stating substrate 7 can be made one, have pump chamber inside the pump housing 6；It is being matched with the piston 5, be installed in the pump chamber
The sealing ring 2 support the linear motion shafting.
The seal assembly is made of seal ring assembly and compact heap 4, and the seal ring assembly is in the pump housing 6
On stepped hole, and the seal ring assembly is pushed down with the compact heap 4；The seal ring assembly can be by sealing ring 2 and attached
Sealing ring 3 forms, and on the periphery of the sealing ring 3, the secondary sealant circle 3 is used to realize the secondary sealant snare 3
Sealing between the sealing ring 2 and the pump housing 6, the sealing ring 2 are used to realize between the sealing ring 2 and the piston 5
Sealing；The seal assembly is mounted in pump chamber, between the pump chamber and the piston 5, so that the pump chamber is each
Space when a outlet blocks, between the pump chamber and the piston 5 forms an airtight cavity, and the piston 5 is in institute
It is generated just when stating under the driving of perforation shaft type linear stepping motor 1 along and into 6 direction of pump housing linear motion, in pump chamber
Pressure, the piston 5 generate negative pressure along when leaving 6 direction of pump housing linear motion, in pump chamber.
The position sensing component is made of photoelectricity gear shaft 9 and optoelectronic switch 10, and the optoelectronic switch 10 is mounted on described
On linear stepping motor 1, the pump housing 6 or the substrate 7, the photoelectricity gear shaft 9 is mounted on the perforation shaft type straight line step
Into motor 1 the lead screw 102 or piston 5 on.When the photoelectricity gear shaft 9 blocks or leave the optoelectronic switch 10
Sensor devices when, the output level of the optoelectronic switch 10 changes.
One or more holes being connected to the pump chamber are provided on the pump housing 6.
Fig. 2 and it is shown in Fig. 3 be another embodiment of the invention, precision plunger is pumped by perforation shaft type linear stepping motor
1(includes stepper motor 101, the lead screw 102 of embedded nut on rotor), seal assembly (including sealing ring 2,3 and of secondary sealant circle
Compact heap 4), piston 5, the pump housing 6, substrate 7, guidance set 8(include slide bar guide part 801 and pilot hole cylindrical surface guide surface
802) it is formed with position sensing component (including photoelectricity gear shaft 9 and optoelectronic switch 10).The connection relationship of each component includes: described passes through
The lead screw 102 and the piston 5 of shaft type linear stepping motor 1 are connected directly and guidance set 8 forms linear motion axis
System；The cylindrical surface guide surface 802 can be cylinder parallel with 102 axis of lead screw on the pump housing 6 or the substrate 7
The inner surface in hole, when the stepper motor 101 rotates but the slider guide part 8 limits the lead screw 102 with the electricity
The embedded nut rotation on machine 101, so that the lead screw 102 is along the cylindrical surface parallel with 102 axis of lead screw
Guide surface 802 moves along a straight line in 102 axis direction of lead screw；The perforation shaft type linear stepping motor 1 and the pump housing 6
It is fitted together by the substrate 7, the pump housing 6 and the substrate 7 can be made one, have pump chamber inside the pump housing 6；
It is being matched with the piston 5, be installed on the sealing ring 2 in the pump chamber to support the linear motion shafting.
The seal assembly is made of seal ring assembly and compact heap 4, and the seal ring assembly is mounted in 6 pump chamber of the pump housing
On interior stepped hole, and the seal ring assembly is pushed down with the compact heap 4；The seal ring assembly can be by 2 He of sealing ring
Secondary sealant circle 3 forms, and the secondary sealant circle between the sealing ring 3 and the pump chamber, use by the secondary sealant circle 3
Realize the sealing between the sealing ring 2 and the pump housing 6, the sealing ring 2 is used to realize the sealing ring 2 and the piston
Sealing between 5；The seal assembly is mounted in pump chamber, between the pump chamber and the piston 5, so that the pump chamber
Space of each outlet when block, between the pump chamber and the piston 5 form an airtight cavity, the piston 5
It is generated when moving along a straight line under the driving of the perforation shaft type linear stepping motor 1 along and into 6 direction of the pump housing, in pump chamber
Positive pressure, the piston 5 generate negative pressure along when leaving 6 direction of pump housing linear motion, in pump chamber.
The position sensing component is made of photoelectricity gear shaft 9 and optoelectronic switch 10, and the optoelectronic switch 10 is mounted on described
It penetrates through on shaft type linear stepping motor 1, the pump housing 6 or the substrate 7, the photoelectricity gear shaft 9 is mounted on the perforation axis
The lead screw 102 of formula linear stepping motor 1 or piston 5 on.When the photoelectricity gear shaft 9 blocks or leave the light
When the sensor devices of electric switch 10, the output level of the optoelectronic switch 10 changes.
The one or more hole being connected to the pump chamber is provided on the pump housing 6.
Two embodiment of the present invention and the other embodiment of the present invention shown in Fig. 1 and Fig. 2, Fig. 3, can be using different close
Sealing assembly structure and position sensing component, form more embodiments.
Fig. 4 A and Fig. 4 B are a kind of structural schematic diagram of seal assembly provided by the embodiment of the present invention.The seal assembly
It is made of seal ring assembly and compact heap 4, seal ring assembly is in the pump housing 6 on the stepped hole of pump chamber, and with the compact heap 4
Push down seal ring assembly；The seal ring assembly can be made of sealing ring 2 and secondary sealant circle 3, and the secondary sealant circle 3 can
To be section for circular O-ring, the sealing ring 2 is a hollow T-shaped structure, the sealing ring 2 and described attached
Belong to the connected periphery part of sealing ring 3 and inner headed face is all cylindrical surface, the secondary sealant snare 3 is in the sealing ring 2
On periphery.The secondary sealant circle 3 can be one, as shown in Figure 4 A；The secondary sealant circle 3 can be two or two
More than, as shown in Figure 4 B.
Fig. 4 C is the structural schematic diagram of another seal assembly provided by the embodiment of the present invention.The seal assembly by
Seal ring assembly and compact heap 7 form, and seal ring assembly is pressed on the stepped hole of pump chamber in the pump housing 6, and with the compact heap 4
Firmly seal ring assembly；The seal ring assembly can be made of sealing ring 2 and secondary sealant circle 3, and the secondary sealant circle 35 can
To be section for circular O-ring, the sealing ring 2 is a hollow T-shaped structure, and the inner headed face of the sealing ring 2 is
There are a groove, the secondary sealant circle 3 in cylindrical surface, the periphery part that the sealing ring 2 is connected with the secondary sealant circle 3
In the groove, the groove section can be rectangle, semi circular surface or arc surface.The secondary sealant circle 3 can be
One, the secondary sealant circle 3 is also possible to two or more.
Fig. 4 D is the structural schematic diagram of another seal assembly provided by the embodiment of the present invention.The seal assembly by
Seal ring assembly and compact heap 4 form, and seal ring assembly is pressed on the stepped hole of pump chamber in the pump housing 6, and with the compact heap 4
Firmly seal ring assembly；The seal ring assembly can be made of sealing ring 2 and secondary sealant circle 3, and the secondary sealant circle 3 can be with
Be section be circular O-ring, the sealing ring 2 is a cirque structure, and the inner headed face of the sealing ring 2 is all cylinder
There are a groove in face, the periphery part that the sealing ring 2 is connected with the secondary sealant circle 3, and the secondary sealant circle 3 is located at
In the groove, the groove section can be rectangle, semi circular surface or arc surface.The secondary sealant circle 3 can be one,
The secondary sealant circle 3 is also possible to two or more.
Fig. 4 E is the structural schematic diagram of another seal assembly provided by the embodiment of the present invention.The seal assembly by
Seal ring assembly and compact heap 4 form, and seal ring assembly is pressed on the stepped hole of pump chamber in the pump housing 6, and with the compact heap 4
Firmly seal ring assembly；The seal ring assembly is a part i.e. sealing ring 2, and the section of the sealing ring 2 can be rectangle, work
Font or other shapes realize sealing between the sealing ring 2 and the pump chamber of the pump housing 6, the sealing ring 2 and described
Sealing between piston 5.
In other embodiment of the present invention, the secondary sealant circle 3 is between the sealing ring 2 and the pump chamber,
The secondary sealant circle 3 is located in the plane for the stepped hole in the pump chamber being used to place the seal assembly, can also be located at
In groove in the plane of the stepped hole.
In different embodiments of the invention, same or different position sensing component can be used.The position sensing
Component can be photoelectricity gear shaft 9 and optoelectronic switch 10, and the optoelectronic switch 10 is mounted on the perforation shaft type linear stepping motor
1, on the pump housing 6 or the substrate 7, the photoelectricity gear shaft 9 is mounted on the described of the perforation shaft type linear stepping motor 1
On lead screw 102 or the piston 5；When the photoelectricity gear shaft 9 blocks or leaves the sensor devices of the optoelectronic switch 10,
The output level of the optoelectronic switch 10 changes.The position sensing component is also possible to Hall switch or position encoded
Device, the Hall switch or position coder are installed on the stepper motor of the perforation shaft type linear stepping motor 1；Institute's rheme
It sets sensory package and is also possible to travel switch, the travel switch is mounted on the pump housing 6, the substrate 7 or the perforation
On shaft type linear stepping motor 1, and the institute on the lead screw 102 or the piston 5 of the perforation shaft type linear stepping motor 1
State the touch part of installation travel switch.
In different embodiments of the invention, the one or more hole being connected to pump chamber is provided on the pump housing 6.Its
In have a hole axis and the piston 5 axis direction it is parallel or be overlapped or with the axis of the piston 5 at certain
Angle, the angle may be greater than 0 degree of some degree being less than in 180 degree.
In different embodiments of the invention, the sealing ring 2 uses wear-resistant material, and the sealing ring material can be polyethers
Ether ketone (PEEK), polyurethane are also possible to polytetrafluoroethylene (PTFE) (PTFE), fluorine-containing rubber or silicon rubber.
In different embodiments of the invention, the piston 5 uses wear-resisting, high-strength material, and the piston material can be
Ceramics are also possible to metal material.
In different embodiments of the invention, the material of the pump housing 6 uses metal or nonmetallic materials, the pump housing material
Material can be polyether-ether-ketone, be also possible to organic glass, polyformaldehyde, polymethyl methacrylate, polycarbonate or stainless steel.
In different embodiments of the invention, formed between the periphery of the piston 5 and the inner headed face of the sealing ring 2 close
Envelope cooperation, the cooperation can be clearance fit, zero clearance cooperation or interference fit.
The present invention uses in the embodiment of rubber or polyurethane material as 2 material of sealing ring, outside the piston 5
Round cylinder diameter is equal compared with the inner circle cylindrical surface diameter of the sealing ring 2 or bigger, and the 5 outer circle cylindrical surface of piston is straight
The difference that diameter subtracts the inner circle cylindrical surface diameter of the sealing ring 2 can be 0 ~ 1mm, preferably 0 ~ 0.2mm.
The present invention uses in embodiment of the polyetheretherketonematerials materials as 2 material of sealing ring, the 5 outer circle cylinder of piston
Face diameter is smaller, equal compared with the inner circle cylindrical surface diameter of the sealing ring 2 or bigger, and the 5 outer circle cylindrical surface of piston is straight
The difference that diameter subtracts the inner circle cylindrical surface diameter of the sealing ring 2 can be -0.05 ~ 0.1mm, preferably 0 ~ 0.08mm.
Claims (12)
1. a kind of precision plunger pump, it is characterised in that:
The precision plunger pump is by perforation shaft type linear stepping motor, guidance set, piston, the pump housing, seal assembly, position sensing
Component and substrate composition；It is described perforation shaft type linear stepping motor lead screw and the piston is connected directly and guidance set is matched
It closes and forms linear motion shafting；The perforation shaft type linear stepping motor and the pump housing are all installed on the substrate, or
The pump housing is made into the i.e. described pump housing of a part, the pump housing with the substrate and is connected with perforation shaft type linear stepping motor
It connects；The pump body has pump chamber；The guidance set includes guide part and guide surface；The seal assembly includes sealing ring.
2. plunger pump according to claim 1, it is characterised in that:
The guide surface is the inner surface for the one or more pilot holes parallel with piston processed on the pump housing, the guiding
Part is the one or more slide bars parallel with piston axis connected side by side with the piston；The guide part and the guide surface
The guidance set is formed, so that the movement of the linear motion shafting is that the straight line moved along the piston axis direction is transported
It is dynamic.
3. precision plunger pumps according to claim 1, it is characterised in that:
The guide surface is the pump housing or a plane or curved surface parallel with piston axis for penetrating through shaft type motor, the guiding
One or more guide runners, the guide runner that part is and the piston connects side by side have one side and the guide surface weight
It closes；The guide part and guide surface form guidance set, so that the movement of the linear motion shafting is along the piston shaft
The linear motion of line direction movement.
4. the precision plunger according to Claims 2 or 3 pumps, it is characterised in that:
There is the seal assembly in the intracorporal pump chamber of pump, the seal assembly is made of seal ring assembly and compact heap, institute
Seal ring assembly is stated on the stepped hole in pump chamber, and push down the seal ring assembly with the compact heap, realized described close
The sealing of sealing assembly and the pump chamber, the seal assembly and piston space, so that when each outlet of the pump chamber blocks,
Space between the pump chamber and the piston forms an airtight cavity；The piston is in the perforation shaft type straight line stepping electricity
Generate positive pressure when moving along a straight line under the driving of machine along and into the pump housing direction, in the pump chamber, the piston is along leaving
When the pump housing direction moves along a straight line, negative pressure is generated in the pump chamber.
5. precision plunger pumps according to claim 4, it is characterised in that:
The seal ring assembly can be made of sealing ring and secondary sealant circle, step of the seal ring assembly in pump chamber
Kong Shang, and the seal ring assembly is pushed down with the compact heap；The secondary sealant circle is located at the sealing ring and the pump chamber
Between, the secondary sealant circle is used to realize the sealing between the sealing ring and the pump chamber, and the sealing ring is used to realize institute
State the sealing between sealing ring and the piston.
6. precision plunger pumps according to claim 4, it is characterised in that:
The seal ring assembly is a part sealing ring, is pushed down on the stepped hole in pump chamber, and with the compact heap, real
The now sealing between the sealing ring and the pump chamber, the sealing of the sealing ring and the piston space；The sealing ring is cut
Face is that rectangle is I-shaped or other shapes.
7. precision plunger pumps according to claim 5, it is characterised in that:
The sealing ring is a hollow T-shaped structure, the periphery of the sealing ring being connected with the secondary sealant circle
Part and inner headed face are all cylindrical surfaces, and the secondary sealant snare is on the periphery of the sealing ring；The secondary sealant circle
It can be one or more.
8. precision plunger pumps according to claim 5, it is characterised in that:
The sealing ring is a hollow T-shaped structure, and the inner headed face of the sealing ring is cylindrical surface, the sealing ring and institute
Stating the connected periphery part of secondary sealant circle has a groove, and the secondary sealant circle is located in the groove, the groove
Section can be rectangle, semi circular surface or arc surface；The secondary sealant circle can be one or more.
9. precision plunger pumps according to claim 5, it is characterised in that:
The sealing ring is a cirque structure, and the inner headed face of the sealing ring is cylindrical surface, the sealing ring and described attached
Belonging to the connected periphery part of sealing ring has a groove, and the secondary sealant circle is located in the groove, the groove section
It can be rectangle, semi circular surface or arc surface；The secondary sealant circle can be one or more.
10. precision plunger pumps according to claim 5, it is characterised in that:
The secondary sealant circle is located in the plane for the stepped hole in the pump chamber being used to place the seal assembly, or is located at
In groove in the plane of the stepped hole.
11. precision plunger pumps according to claim 1, it is characterised in that:
The material of the sealing ring of the seal assembly be rubber or polyurethane, outside piston cylindrical surface diameter with it is described
For the inner circle cylindrical surface diameter of sealing ring compared to equal or bigger, outside piston cylindrical surface diameter subtracts the interior of the sealing ring
The difference of round cylinder diameter is 0~1mm.
12. precision plunger pumps according to claim 1, it is characterised in that:
The material of the sealing ring of the seal assembly is polyether-ether-ketone, outside piston cylindrical surface diameter and the sealing
For the inner circle cylindrical surface diameter of circle compared to smaller, equal or bigger, outside piston cylindrical surface diameter subtracts the sealing ring
The difference of inner circle cylindrical surface diameter is -0.05~0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820855463.XU CN208605317U (en) | 2018-06-04 | 2018-06-04 | A kind of precision plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820855463.XU CN208605317U (en) | 2018-06-04 | 2018-06-04 | A kind of precision plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208605317U true CN208605317U (en) | 2019-03-15 |
Family
ID=65662371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820855463.XU Expired - Fee Related CN208605317U (en) | 2018-06-04 | 2018-06-04 | A kind of precision plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208605317U (en) |
-
2018
- 2018-06-04 CN CN201820855463.XU patent/CN208605317U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191115 Address after: 100085 Room 601, unit 1, building 3, Shangdi Dongli District 7, Haidian District, Beijing Patentee after: Shen Xiner Address before: 100094 No. five, No. 4, building 7, No. 5009, Feng Yin Middle Road, Beijing, Haidian District Patentee before: Fu Beijing Kaiyin Biological Technology Co. Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190315 Termination date: 20210604 |
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| CF01 | Termination of patent right due to non-payment of annual fee |