CN214464847U - Novel plunger pump structure - Google Patents
Novel plunger pump structure Download PDFInfo
- Publication number
- CN214464847U CN214464847U CN202120378451.4U CN202120378451U CN214464847U CN 214464847 U CN214464847 U CN 214464847U CN 202120378451 U CN202120378451 U CN 202120378451U CN 214464847 U CN214464847 U CN 214464847U
- Authority
- CN
- China
- Prior art keywords
- plunger pump
- main shaft
- ring
- bearing
- permanent magnet
- 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.)
- Active
Links
Images
Landscapes
- Rotary Pumps (AREA)
Abstract
The utility model relates to a novel plunger pump structure, it includes rotor housing and plunger pump shell be equipped with the master cylinder body in the rotor housing, the master cylinder body links to each other with rotor housing through the center pin axle the master cylinder body is equipped with the rotor housing junction and joins in marriage the food tray, and the bulb end of center ejector pin links to each other with the main shaft, is equipped with a plurality of ball sockets on this side main shaft terminal surface be equipped with the connecting rod plunger between ball socket and the plunger hole, the main shaft is established in the plunger pump shell be equipped with bevel gear on the main shaft, bevel gear and tapered tooth match the setting be equipped with permanent magnet bearing assembly on the main shaft main extreme of bevel gear below be equipped with mechanical bearing on the main shaft tip of permanent magnet bearing assembly below. The utility model discloses the main shaft hypervelocity is rotatory, automatic balance load, low energy consumption.
Description
Technical Field
The utility model relates to a plunger pump, concretely relates to permanent magnet bearing supporting formula plunger pump.
Background
The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. The device is widely applied to occasions with high pressure, large flow and flow needing to be adjusted, such as hydraulic machines, engineering machinery and ships.
Wherein the support mode directly influences the efficiency, stability, life-span of pump. Generally, the plunger pump main shaft is supported by mechanical bearings and two or more mechanical bearing assemblies, so that the main shaft is rotatably fixed in the pump body. When the oil distribution disc works, the main shaft rotates by inputting energy from outside, so that the plunger reciprocates in the oil cavity of the cylinder body, and oil absorption and oil pressing are realized under the action of the oil distribution disc.
With the development of hydraulic technology and engineering machinery, higher requirements are provided for the rotating speed, stability and efficiency of a main shaft of a plunger pump, but when a common plunger pump operates, the plunger pump is used as a mechanical bearing for supporting the main shaft, friction can be generated inevitably, the problems of uneven loading and difficulty in automatic adjustment can be easily caused under high-speed operation, and therefore ultrahigh-speed operation of the main shaft can not be realized, and the requirements of stability and the like of the pump under high rotating speed can not be met.
Disclosure of Invention
The purpose of the invention is as follows: the utility model aims at overcoming the not enough among the prior art, provide a novel plunger pump structure of main shaft hypervelocity rotation, automatic balance load, low energy consumption.
The technical scheme is as follows: in order to solve the technical problem, the utility model provides a novel plunger pump structure, which comprises a rotor shell and a plunger pump shell, wherein a connecting sleeve is arranged on the inner side wall of the joint of the rotor shell and the plunger pump shell, a main cylinder body is arranged in the rotor shell, conical teeth are integrally arranged at one end of the main cylinder body close to a main shaft, the main cylinder body is connected with the rotor shell through a center pin shaft, one end of the center pin shaft is fixedly connected with the rotor shell, the other end of the center pin shaft is connected with the rotor shell through a needle bearing, the needle bearing is arranged in a center hole of the main cylinder body, an oil distribution disc is arranged at the joint of the main cylinder body and the rotor shell, the needle bearing is sleeved on the center pin shaft, a plurality of plunger holes are arranged on the main cylinder body outside the center hole, a spring seat is arranged at one end of the center hole, and the spring seat is connected with a center ejector rod, the improved plunger pump is characterized in that one end of the central ejector rod is arranged on the spring seat in a penetrating mode, a spring is sleeved outside the central ejector rod, the ball end of the central ejector rod is connected with a main shaft, a plurality of ball sockets are arranged on the end face of the main shaft on the side, the ball sockets and the plunger holes are arranged in a one-to-one correspondence mode, a connecting rod plunger is arranged between the corresponding ball sockets and the corresponding plunger holes, the main shaft is arranged in the plunger pump shell, a bevel gear is arranged on the main shaft, the bevel gear is matched with conical teeth, a permanent magnet bearing assembly is arranged on the large end of the main shaft below the bevel gear, a mechanical bearing is arranged on the small end of the main shaft below the permanent magnet bearing assembly, one end of the mechanical bearing is provided with a spring retainer ring, and an outer end cover is arranged on the end face of the bottom of the plunger pump shell.
Further, the permanent magnet bearing assembly comprises a permanent magnet bearing, a sleeve and an inner end cover, the permanent magnet bearing is arranged in an offset mode, an inner ring of the permanent magnet bearing is axially positioned by a shaft shoulder of a main shaft and is simultaneously compressed by the sleeve, an outer ring of the permanent magnet bearing is positioned by a permanent magnet bearing hole on a plunger pump shell and is simultaneously compressed by the inner end cover, the permanent magnet bearing comprises a rotor and a stator, the rotor comprises a movable magnetic ring, a movable retainer and a rotor magnetism isolating ring, the movable retainer is a hollow shaft and is sleeved on the main shaft, an outer flange is arranged on the outer wall of one end of the movable retainer along the radial direction, the outer side of the outer flange is in contact positioning with the shaft shoulder on the main shaft, the movable magnetic ring and the rotor magnetism isolating ring are both sleeved on the movable retainer, the movable magnetic ring is arranged between the rotor magnetism isolating ring and the outer flange of the movable retainer, the stator comprises a fixed magnetic ring, a fixed retainer and a stator magnetism isolating ring, the fixed magnetic ring is sleeved on the movable magnetic ring, the stator magnetism isolating ring is sleeved on an outer flange of the movable retainer and is in contact with the outer flange, the fixed retainer is a hollow shaft and is sleeved on the fixed magnetism isolating ring, a circle of inner flange is arranged on the inner wall of one end of the fixed retainer along the radial direction, the inner flange of the fixed retainer is opposite to the rotor magnetism isolating ring, the fixed magnetism isolating ring is arranged between the inner flange of the fixed retainer and the stator magnetism isolating ring, the fixed retainer is compressed by an inner end cover, and the inner flange of the fixed retainer is positioned between a concave flange of a plunger pump shell and the fixed magnetism isolating ring.
Further, the inner ring of the mechanical bearing is axially positioned by the sleeve and is fixed by the spring retainer ring, and the outer ring of the mechanical bearing is positioned by a mechanical bearing hole on the shell of the plunger pump and is compressed by the outer end cover.
Furthermore, the inner end cover is a transparent cover and is installed inside the plunger pump shell, and the outer protruding edge I of the inner end cover is fixedly connected with the concave edge of the inner wall of the plunger pump shell through screws.
Further, the outer end cover is a transparent cover, and an outer flange II of the outer end cover is fixedly connected with the end face of the bottom of the plunger pump shell through a screw.
Further, the mechanical bearing is a deep groove ball bearing.
Further, the sleeve is fixed on the main shaft.
Furthermore, the permanent magnet bearing is arranged in a mode that the inner magnetic ring and the outer magnetic ring are arranged in an offset mode, the inner magnetic ring and the outer magnetic ring have axial offset displacement, and the offset displacement is set according to the axial load when the pump operates, so that the bearing provides radial suspension support and can bear the main axial load during operation.
Has the advantages that: compared with the prior art, the utility model, it is showing the advantage and is: the utility model has the advantages of reasonable overall structure, adopt the permanent magnetism bearing supporting with the main shaft of plunger pump, permanent magnetism bearing utilizes permanent magnet magnetic field force itself to get up the stable suspension of main shaft, automatic balance function has, the even characteristics of bearing capacity distribution, can improve the stability of plunger pump operation, contact friction through reducing the pivot, reduce the temperature rise, improve the pivot rotational speed, can improve the power density of pump by a wide margin, and can prolong mechanical life, improve the efficiency of pump, permanent magnetism bearing need not the lubrication, therefore also need not sealing device, the project organization has been simplified, thereby the reliability of plunger pump has been improved, the inside and outside magnetic ring biasing of permanent magnetism bearing supporting adoption is arranged, make the bearing provide outside the radial suspension supporting, can also bear the main axial load of during operation, very big reduction mechanical bearing's in the course of work bearing, mechanical life is improved.
Drawings
Fig. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a schematic view of a longitudinal connection structure of the permanent magnet bearing of the present invention;
fig. 4 is a schematic view of the transverse connection structure of the permanent magnet bearing of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the novel plunger pump structure of the present invention comprises a rotor housing 1 and a plunger pump housing 2, wherein a connecting sleeve 3 is arranged on the inner side wall of the joint of the rotor housing 1 and the plunger pump housing 2, a main cylinder 4 is arranged in the rotor housing 1, one end of the main cylinder 4 close to a main shaft 5 is integrally provided with a tapered tooth 6, the main cylinder 4 is connected with the rotor housing 1 through a center pin 7, one end of the center pin 7 is fixedly connected with the rotor housing 1, the other end of the center pin 7 is connected with the rotor housing 1 through a needle bearing 8, the needle bearing 8 is arranged in a center hole of the main cylinder 1, an oil distribution disc 7 is arranged at the joint of the main cylinder 4 and the rotor housing 1, the needle bearing 8 is sleeved on the center pin 7, the main cylinder 4 outside the center hole is provided with a plurality of plunger holes 9, one end of the center hole is provided with a spring seat 10, the spring seat 10 is connected with a central ejector rod 11, one end of the central ejector rod 11 is arranged on the spring seat 10 in a penetrating way, a spring 12 is sleeved outside the central ejector rod 11, the ball head end of the central ejector rod 11 is connected with a main shaft 5, a plurality of ball sockets 12 are arranged on the end surface of the main shaft 5 on the side, the ball sockets 12 and plunger holes 9 are arranged in a one-to-one correspondence way, a connecting rod plunger 13 is arranged between the corresponding ball sockets 12 and the plunger holes 9, the main shaft 5 is arranged in a plunger pump shell body 2, a bevel gear 14 is arranged on the main shaft 5, the bevel gear 14 and a conical tooth 6 are arranged in a matching way, a permanent magnet bearing assembly is arranged on the large end 15 of the main shaft 5 below the bevel gear 14, a mechanical bearing 17 is arranged on the small end 16 of the main shaft 12 below the permanent magnet bearing assembly, the mechanical bearing 17 is a deep groove ball bearing, a spring retainer ring 18 is arranged at one end of the mechanical bearing 17, an outer end cover 19 is arranged on the end surface of the bottom of the plunger pump shell body 2, and the main shaft of the plunger pump is supported by the permanent magnet bearing, the permanent magnet bearing utilizes the magnetic field force of the permanent magnet to suspend the main shaft stably, has the function of automatic balance, has the characteristic of uniform distribution of bearing capacity, can improve the stability of the operation of the plunger pump, reduces temperature rise through reducing the contact friction of a rotating shaft, improves the rotating speed of the rotating shaft, can greatly improve the power density of the pump, can prolong the mechanical life, improve the efficiency of the pump, does not need lubrication, does not need a sealing device, simplifies the design structure and improves the reliability of the plunger pump.
The permanent magnet bearing assembly comprises a permanent magnet bearing 20, a sleeve 21 and an inner end cover 22, the permanent magnet bearing 20 is arranged in an offset mode, the inner ring of the permanent magnet bearing 20 is axially positioned by a shaft shoulder 23 of a main shaft 5 and is compressed by the sleeve 19, the outer ring of the permanent magnet bearing is positioned by a permanent magnet bearing hole 24 on a plunger pump shell 2 and is compressed by the inner end cover 20, the permanent magnet bearing 20 comprises a rotor and a stator, the rotor comprises a movable magnetic ring 25, a movable retainer 26 and a rotor magnetism isolating ring 27, the movable retainer 26 is a hollow shaft and is sleeved on the main shaft 5, the outer wall of one end of the movable retainer 26 is provided with a circle of outer flange 28 along the radial direction, the outer side of the outer flange 28 is in contact positioning with the shaft shoulder on the main shaft 5, the movable magnetic ring 25 and the rotor magnetism isolating ring 27 are both sleeved on the movable retainer 26, the movable magnetic ring 25 is arranged between the rotor magnetism isolating ring 27 and the outer flange 28 of the movable retainer 26, the stator comprises a fixed magnetic ring 29, a fixed retainer 30 and a stator magnetism isolating ring 31, a fixed magnetic ring 29 is sleeved on the movable magnetic ring 25, a stator magnetism isolating ring 31 is sleeved on an outer flange 28 of a movable retainer 26, a stator magnetism isolating ring 31 is contacted with the outer flange 28, a fixed retainer 30 is a hollow shaft, the fixed retainer 30 is sleeved on the fixed magnetic ring 29, the inner wall of one end of the fixed retainer 30 is provided with a circle of inner flange 32 along the radial direction, the inner flange 32 of the fixed retainer 30 is opposite to a rotor magnetism isolating ring 27, the fixed magnetic ring 29 is arranged between the inner flange 32 of the fixed retainer 30 and the stator magnetism isolating ring 31, the fixed retainer 30 is pressed by an inner end cover 22, the inner flange 32 of the fixed retainer 30 is positioned between a concave flange 33 of a plunger pump shell 2 and the fixed magnetic ring 29, a permanent magnetic bearing is supported by adopting an inner magnetic ring and an outer magnetic ring in an offset arrangement, the bearing can bear main axial load during working besides providing radial suspension support, so that the bearing of the mechanical bearing in the working process is greatly reduced, and the mechanical life is prolonged.
The inner ring of the mechanical bearing 17 is axially positioned by the sleeve 21 and is fixed by the spring collar 18, the outer ring is positioned by the mechanical bearing hole 34 on the plunger pump shell 2 and is pressed by the outer end cover 19, the connection is firm, and the sleeve 21 is fixed on the main shaft 5.
The inner end cover 22 is a transparent cover and is installed inside the plunger pump shell 2, and an outer protruding edge I35 of the inner end cover 22 and an inner wall concave edge 36 of the plunger pump shell 2 are fixedly connected through screws and are connected in place, so that observation is facilitated.
The outer end cover 19 is a transparent cover, and the outer flange II 37 of the outer end cover 19 is fixedly connected with the bottom end face of the plunger pump shell 2 through screws, so that the connection is in place, and the observation is convenient.
When the oil suction and oil discharge device works, one end of the main shaft and the main cylinder body are in bevel gear transmission, the other end of the main shaft is connected with external power, when the external power is input, the main shaft rotates to further drive the main cylinder body to rotate, a connecting rod plunger connected to the end face of the large end of the main shaft makes reciprocating linear motion in a cylindrical oil cavity in the main cylinder body, and in one period, under the action of an oil distribution disc, an oil suction and oil discharge process is completed.
The utility model provides a thinking and method, the method and the way of specifically realizing this technical scheme are many, above only the utility model discloses a preferred embodiment should point out, to the ordinary technical personnel in this technical field, not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improvements should also be regarded as the utility model discloses a protection range, each component that does not make clear and definite in this embodiment all can be realized with prior art.
Claims (7)
1. A novel plunger pump structure is characterized in that: the plunger pump comprises a rotor shell (1) and a plunger pump shell (2), wherein a connecting sleeve (3) is arranged on the inner side wall of the joint of the rotor shell (1) and the plunger pump shell (2), a main cylinder body (4) is arranged in the rotor shell (1), one end, close to a main shaft (5), of the main cylinder body (4) is integrally provided with tapered teeth (6), the main cylinder body (4) is connected with the rotor shell (1) through a center pin shaft (7), one end of the center pin shaft (7) is fixedly connected with the rotor shell (1), the other end of the center pin shaft (7) is connected with the rotor shell (1) through a needle bearing (8), the needle bearing (8) is arranged in a center hole of the main cylinder body (4), an oil distribution disc (38) is arranged at the joint of the main cylinder body (4) and the rotor shell (1), and the needle bearing (8) is sleeved on the center pin shaft (7), a plurality of plunger holes (9) are formed in a main cylinder body (4) on the outer side of the central hole, a spring seat (10) is arranged at one end of the central hole, the spring seat (10) is connected with a central ejector rod (11), one end of the central ejector rod (11) is arranged on the spring seat (10) in a penetrating mode, a spring is sleeved outside the central ejector rod (11), the ball head end of the central ejector rod (11) is connected with a main shaft (5), a plurality of ball sockets (12) are arranged on the end face of the main shaft (5) on the side, the ball sockets (12) and the plunger holes (9) are arranged in a one-to-one correspondence mode, a connecting rod plunger (13) is arranged between the corresponding ball sockets (12) and the plunger holes (9), the main shaft (5) is arranged in a plunger pump shell (2), a bevel gear (14) is arranged on the main shaft (5), the bevel gear (14) is matched with conical teeth (6), and a permanent magnet bearing assembly is arranged at the large end (15) of the main shaft (5) below the bevel gear (14), the plunger pump is characterized in that a mechanical bearing (17) is arranged on a small end (16) of the main shaft (5) below the permanent magnet bearing assembly, a spring collar (18) is arranged at one end of the mechanical bearing (17), and an outer end cover (19) is arranged on the end face of the bottom of the plunger pump shell (2).
2. The novel plunger pump structure of claim 1, characterized in that: the permanent magnet bearing assembly comprises a permanent magnet bearing (20), a sleeve (21) and an inner end cover (22), the permanent magnet bearing (20) is arranged in a bias mode, the inner ring of the permanent magnet bearing is axially positioned by a shaft shoulder (23) of a main shaft (5) and is simultaneously pressed by the sleeve (21), the outer ring of the permanent magnet bearing is positioned by a permanent magnet bearing hole (24) in a plunger pump shell (2) and is simultaneously pressed by the inner end cover (22), the permanent magnet bearing (20) comprises a rotor and a stator, the rotor comprises a movable magnetic ring (25), a movable retainer (26) and a rotor magnetism isolating ring (27), the movable retainer (26) is a hollow shaft and is sleeved on the main shaft (5), the outer wall of one end of the movable retainer (26) is provided with a circle of outer flange (28) along the radial direction, the outer side of the outer flange (28) is in contact positioning with the shaft shoulder of the main shaft (5), the movable magnetic ring (25) and the rotor magnetism isolating ring (27) are both sleeved on the movable retainer (26), the stator comprises a fixed magnetic ring (29), a fixed retainer (30) and a stator magnetic isolating ring (31), the fixed magnetic ring (29) is sleeved on the movable magnetic ring (25), the stator magnetic isolating ring (31) is sleeved on the outer flange (28) of the movable retainer (26) and the stator magnetic isolating ring (31) is in contact with the outer flange (28), the fixed retainer (30) is a hollow shaft and the fixed retainer (30) is sleeved on the fixed magnetic ring (29), a circle of inner flange (32) is arranged on the inner wall of one end of the fixed retainer (30) along the radial direction, the inner flange (32) of the fixed retainer (30) is opposite to the rotor magnetic isolating ring (27), the fixed magnetic ring (29) is arranged between the inner flange (32) of the fixed retainer (30) and the stator magnetic isolating ring (31), the fixed retainer (30) is pressed by the inner end cover (22), and an inner flange (32) of the fixed retainer (30) is positioned between a concave edge (33) and a fixed magnetic ring (29) of the plunger pump shell (2).
3. The novel plunger pump structure of claim 2, characterized in that: the inner ring of the mechanical bearing (17) is axially positioned by a sleeve (21) and is fixed by a spring collar (18), and the outer ring of the mechanical bearing is positioned by a mechanical bearing hole (34) on the plunger pump shell (2) and is compressed by an outer end cover (19).
4. The novel plunger pump structure of claim 2, characterized in that: the inner end cover (22) is a transparent cover and is arranged inside the plunger pump shell (2), and an outer protruding edge I (35) of the inner end cover (22) is fixedly connected with an inner wall concave edge (36) of the plunger pump shell (2) through screws.
5. The novel plunger pump structure of claim 2, characterized in that: the outer end cover (19) is a transparent cover, and an outer flange II (37) of the outer end cover (19) is fixedly connected with the bottom end face of the plunger pump shell (2) through screws.
6. The novel plunger pump structure of claim 2, characterized in that: the mechanical bearing (17) is a deep groove ball bearing.
7. The novel plunger pump structure of claim 2, characterized in that: the sleeve (21) is fixed on the main shaft (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120378451.4U CN214464847U (en) | 2021-02-20 | 2021-02-20 | Novel plunger pump structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120378451.4U CN214464847U (en) | 2021-02-20 | 2021-02-20 | Novel plunger pump structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214464847U true CN214464847U (en) | 2021-10-22 |
Family
ID=78143927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120378451.4U Active CN214464847U (en) | 2021-02-20 | 2021-02-20 | Novel plunger pump structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214464847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855517A (en) * | 2021-02-20 | 2021-05-28 | 江苏可奈力机械制造有限公司 | Permanent magnet bearing supporting type plunger pump |
-
2021
- 2021-02-20 CN CN202120378451.4U patent/CN214464847U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855517A (en) * | 2021-02-20 | 2021-05-28 | 江苏可奈力机械制造有限公司 | Permanent magnet bearing supporting type plunger pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214464847U (en) | Novel plunger pump structure | |
| CN201742219U (en) | High-voltage three-phase asynchronous motor for cylindrical low-noise compressor | |
| CN112855517A (en) | Permanent magnet bearing supporting type plunger pump | |
| CN111075678A (en) | Oblique axis bevel gear pump | |
| CN103527437A (en) | High-pressure and high-speed valve flow distributing axial plunger pump | |
| CN212272830U (en) | Ultra-high precision hydrostatic bearing | |
| CN114396427A (en) | Self-lubricating bearing and preparation method thereof | |
| CN210178876U (en) | Loader gearbox speed change pump power-take-off port bearing support structure | |
| CN2583386Y (en) | Oblique axis type axial plunger motor | |
| CN221033097U (en) | Mechanical sealing device of rotor pump | |
| CN111623038A (en) | Ultrahigh-precision hydrostatic bearing | |
| CN213684929U (en) | Novel crankshaft | |
| CN203321826U (en) | Half-sealed oil injecting screw booster | |
| CN216490093U (en) | Driving structure of hydraulic pipe fitting machining tool | |
| CN104912730A (en) | Inner curvilinear low-speed large-torque water hydraulic motor with replaceable wearproof dish | |
| CN201705708U (en) | Novel two-end supporting type double-suction oil pump structure | |
| CN211777848U (en) | Y-shaped connecting rod piston pump | |
| CN111120238A (en) | Floating transmission mechanism and micropump | |
| CN218845022U (en) | Main shaft and sun gear integral type hydraulic pressure plunger motor | |
| CN217044627U (en) | Live center with high rotation precision | |
| CN2268152Y (en) | Vertical high-speed motor oil lubrication sealing device | |
| CN214464648U (en) | Rotor assembly structure with high reliability | |
| CN102261456B (en) | Friction speed increaser for high speed transmission | |
| CN217434365U (en) | Integrated motor pump rotary joint | |
| CN214742034U (en) | High-precision high-stability long-service-life ternary rotor pump device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |