LIQUID PUMPING DEVICE

Abstract

Disclosed is a liquid pumping device, including a first component, a second component and a third component, wherein the second component moves relative to the first component in a fixed manner; a medium inlet and a medium outlet not in communication with each other are provided in a contact surface of the first component in liquid tightness sliding fit with the second component; a groove is provided in a contact surface of the second component in liquid tightness sliding fit, and the groove moves along a fixed path in the range of the contact surface in liquid tightness sliding fit; and the movement path of the groove respectively passes the medium inlet, the medium outlet and the third component, the third component is arranged on the side of the medium outlet in the forward movement direction of the groove, and when the groove moves forward through the third component, the part of the third component entering the groove extrudes the medium in the groove to the medium outlet. The quantification of liquid by the device of the present invention is determined by the groove, and the principle facilitates the control of the output precision of the pump.

Claims

1. A liquid pumping device, comprising a first component, a second component, and a third component, wherein the second component moves relative to the first component in a fixed manner, and at least a part of a contact surface of the first component and the second component is in liquid tightness sliding fit; a medium inlet and a medium outlet, not in communication with each other, are provided in the contact surface of the first component in liquid tightness sliding fit with the second component; at least one cave is provided in the contact surface of the second component in liquid tightness sliding fit with the first component; the cave moves in a fixed path in a range of the contact surface in liquid tightness sliding fit, along with a movement of the second component; a movement path of the cave passes respectively the medium inlet and the medium outlet on the first component and the third component; when the cave passes the third component, the third component at least partially enters the cave and fills the cave horizontally; the third component is arranged on a side of the medium outlet in a forward movement direction of the cave, and when the cave moves forward passing the third component, a part of the third component entering the cave extrudes medium in the cave to the medium outlet.

2. The liquid pumping device according to claim 1, wherein a side of the third component in a reverse movement direction of the cave is in natural communication with or transient communication with the medium outlet via the cave passing by.

3. The liquid pumping device according to claim 1, wherein the third component is located on a side of the medium inlet in the reverse movement direction of the cave, and when the cave passes the third component in the reverse movement direction, a part of the third component entering the cave extrudes medium in the cave to the medium inlet.

4. The liquid pumping device according to claim 3, wherein a side of the third component in the forward movement direction of the cave is in natural communication with or transient communication with the medium inlet via the cave passing by.

5. The liquid pumping device according to claim 1, wherein the movement of the second component is a rotational movement, and the contact surface of the first component and the second component in liquid tightness sliding fit is a plane perpendicular to a rotation axis of the second component, or a revolution surface coaxial with the rotation axis of the second component.

6. The liquid pumping device according to claim 1, wherein there is at least one group of caves and each group comprises at least one cave; the caves in same group share a movement path; each group has different cave movement path; in each group, the caves are evenly arranged along the movement path.

7. The liquid pumping device according to claim 1, wherein there are multiple groups of the medium inlets, the medium outlets, and the third components; each group comprises one medium inlet, one medium outlet, and one third component arranged between the medium inlet and the medium outlet; each group of medium inlets and medium outlets is provided alternatively on the movement paths of a cave groups.

8. The liquid pumping device according to claim 1, wherein an inner surface of the cave is a smooth curved surface, and a front edge and a rear edge of the cave are smoothly transitioned.

9. The liquid pumping device according to claim 1, wherein an elastic convex portion adapted to a shape of the cave is provided on the third component.

10. The liquid pumping device according to claim 1, wherein the second component is a core of a rotating body structure, and the first component is a cylinder liner sleeved on an outside of the core; the core rotates relatively inside the cylinder liner; an inner side of the cylinder liner and the outside of the core are in liquid tightness sliding fit in a section in an axial direction; the medium inlet and the medium outlet are arranged on an inner side surface of a section of the cylinder liner in liquid tightness sliding fit with a core side, and the cave is arranged on a section of the core side in liquid tightness sliding fit with the inner side of the cylinder liner; the third component is arranged on a side of the medium outlet in a forward rotation direction of the core; when the cave passes the third component with a forward rotation movement of the core, a part of the third component enters the cave and extrudes medium from the cave to the medium outlet.

11. The liquid pumping device according to claim 10, wherein the third component is located on a side of the medium inlet in a reverse rotation direction of the core; when the cave passes the third component with a reverse rotation movement of the core, a part of the third component enters the cave and extrudes medium from the cave to the medium inlet.

12. The liquid pumping device according to claim 10, wherein the core is a cylindrical structure, and the cylinder liner is a cylindrical sleeve structure.

13. The liquid pumping device according to claim 1, wherein a movement method of the second component relatively to the first component is rotation, or movement, or a combination of rotation and movement.

14. The liquid pumping device according to claim 3, wherein the movement of the second component is a rotational movement, and the contact surface of the first component and the second component in liquid tightness sliding fit is a plane perpendicular to a rotation axis of the second component, or a revolution surface coaxial with the rotation axis of the second component.

15. The liquid pumping device according to claim 3, wherein there is at least one group of caves and each group comprises at least one cave; the caves in same group share a movement path; each group has different cave movement path; in each group, the caves are evenly arranged along the movement path.

16. The liquid pumping device according to claim 3, wherein there are multiple groups of the medium inlets, the medium outlets, and the third components; each group comprises one medium inlet, one medium outlet, and one third component arranged between the medium inlet and the medium outlet; each group of medium inlets and medium outlets is provided alternatively on the movement paths of a cave groups.

17. The liquid pumping device according to claim 3, wherein an inner surface of the cave is a smooth curved surface, and a front edge and a rear edge of the cave are smoothly transitioned.

18. The liquid pumping device according to claim 3, wherein an elastic convex portion adapted to a shape of the cave is provided on the third component.

19. The liquid pumping device according to claim 11, wherein the core is a cylindrical structure, and the cylinder liner is a cylindrical sleeve structure.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG. 1 is a schematic structural view of a liquid pumping device of the present invention.

[0037] FIG. 2 is a schematic structural cross-sectional view of the liquid pumping device shown in FIG. 1.

[0038] FIG. 3 is a structural schematic view of a longitudinal section of the liquid pumping device shown in FIG. 1.

[0039] FIG. 4 is a schematic view of the surface structure of the core of the liquid pumping device shown in FIG. 1.

[0040] FIG. 5 is a schematic structural view of another structure form of a liquid pumping device of the present invention.

[0041] FIG. 6 is an A-o-o-A sectional view of the liquid pumping device shown in FIG. 5.

[0042] FIG. 7 is a schematic structural view showing normal communication by a groove-shaped channel between a medium outlet and the side of the third component in the reverse movement direction of the cave.

[0043] FIG. 8 is a schematic structural view showing transient communication by the cave passing between a medium outlet and the side of the third component in the reverse movement direction of the cave.

[0044] FIG. 9 is a schematic structural view showing the direct normal communication between the medium outlet and the side of the third component in the reverse movement direction of the cave.

[0045] Notes: 1. pump shell, 2. cylinder liner, 3. seal ring adapter, 4. core, 5. cover plate, 6. spindle, 7. seal ring, 8. third component, 9. spring, 10. cave, 11. snap spring, 12. medium inlet, 13. medium outlet, 14. elastic convex portion, 21. first component, 22. second component.

DESCRIPTION OF THE EMBODIMENTS

[0046] The principle and basic structure of the liquid pumping device of the present invention will be further illustrated below with reference to the accompanying drawings.

[0047] FIGS. 1 to 4 show an optional structural form of the liquid pumping device according to the present invention. The overall structure is a columnar structure, the first component is cylindrical, the second component is cylindrical, and the two components are assembled coaxially, and the second component moves rotationally.

[0048] Referring to FIG. 1, in this example, the device includes four main components: a pump shell 1, a cylinder liner 2, a core 4, and a third component 8. The cylinder liner 2 is independent of pump shell 1 and is made of a material with higher hardness and better wear and tear resistance than the shell. The cylinder liner 2 is a cylindrical sleeve that fixed tightly with the pump shell 1. The core 4 is a circular cylindrical structure and is assembled in the cylinder liner 2. The inner side of the cylinder liner 2 is liquid tightness sliding fit with the core 4 side surface. The cylinder liner 2 and the pump shell 1 together form a pump body. The two sides of the pump body are respectively provided with a medium inlet 12 and a medium outlet 13. The inner end openings of the medium inlet 12 and the medium outlet 13 are located on the inner side of the cylinder liner 2 and the outer end openings are located on the outer surface of the pump shell 1. A third component mounting hole is provided between the medium inlet 12 and the medium outlet 13, and the third component 8 is arranged in the third component mounting hole. There is cave 10 on the side of the core 4. During the rotation of the core, the cave 10 passes the inner end opening of the medium inlet 12 and the inner end opening of the medium outlet 13 successively; the third component 8 is arranged on the side of the medium outlet 13 in the forward rotation direction of the core. An elastic convex portion 14 is provided on the front end surface of the third component 8.

[0049] Referring to FIG. 2, four caves 10 are evenly arranged on the side of the core 4 along the circumferential direction. The caves are equal in size and shape. The length of the cave in the circumferential direction of the core is shorter than the minimum interval arc length between the inner end opening of the medium inlet and the inner end opening of the medium outlet. The periphery of each cave has a smooth transition with the surface of the core contour, and any cross section of the cave is arched with the same arc. The contour of the elastic convex portion has matching arc shape. The rear side of the elastic convex portion is in communication with the medium outlet through a channel.

[0050] The side of the third component 8 is tightly attached to the third component mounting hole and fully seals the hole. The third component is a cavity structure with an opening at the rear end. A spring 9 is provided in the cave of the third component, and the spring presses the front wall and the side wall forward and around. The front end surface of the third component has an arc surface with the same arc as the core side, and the front end surface of the third component is always tightly sealed with the core side. A cover plate 5 is provided on the outer side of the third component mounting hole, and the cover plate 5 is assembled on pump shell 1 by means of screws or buckles.

[0051] Referring to FIG. 3, the core 4 axis is provided with a spindle 6, and the spindle 6 is fixed with core 4. The driving device makes the core to rotate by turning the spindle. A seal ring 7 and a seal ring adapter 3 are respectively provided on the upper and lower end surfaces of the core to prevent leakage of the medium. A snap spring 11 is provided outside of the seal ring adapter 3 at both ends. The inner side of the cylinder liner is provided with snap spring grooves at both ends for mounting the snap spring 11.

[0052] Referring to FIG. 4, there may be multiple rows of caves 10. In this example, there are two rows, each row includes six caves, and the six caves in each row are evenly arranged along the circumferential direction of the core surface. There are two elastic convex portions on the third component corresponding to each row of caves, respectively. The two rows of caves are arranged at 30 degrees offset from each other in the circumferential direction.

[0053] FIGS. 5 and 6 show another optional structural form of the liquid pumping device according to the present invention. The device has a disc-shaped structure as a whole. Both the first component 21 and the second component 22 have a circular planar structure. The contact surface is a plane, performing a liquid tightness sliding fit. The second component 22 rotates around the center of the circle, taking clockwise as the forward direction. Two groups of caves 10 are provided along two cave movement path 101 and 102 on the second component 22 respectively, 6 caves for each group. The caves from 2 groups are arranged in an interlacing order. A first medium inlet 121, a first medium outlet 131, a first third component 81, a second medium inlet 122, a second medium outlet 132, and a second third component 82 are arranged on the first component 21 in a circumferentially clockwise direction. Wherein, the first medium outlet 131 is set near the first third component 81, and the second medium outlet 132 is set near the second third component 82. The radial widths of the first medium inlet 121, the first medium outlet 131, the first third component 81, the second medium inlet 122, the second medium outlet 132 and the second third component 82 are greater than the total radial width of the two rows of caves.

[0054] Referring to FIGS. 7 to 9, three typical forms of communication between the medium outlet 13 and the third component 8 on the side of the medium outlet are shown. Of which, FIG. 7 is a schematic structural view showing the normal communication by a groove-shaped channel 1301 between the medium outlet and the third component on the side of the medium outlet. The medium outlet consists of a first part 1302 and a groove-shaped channel 1301 as a second part. The forward movement direction of the second component is shown by the arrow. The cave 10 moves forward with the second component 22, and passes the medium inlet 12, the medium outlet, and the third component 8 sequentially. When the cave 10 moves through medium inlet 12, due to a negative pressure in cave 10, the medium in medium inlet enters the cave and fills it. When the cave 10 passes the third component 8, the top of third component intrudes into the cave, and the medium in the cave is extruded outwards to enter the groove-shaped channel 1301 of the medium outlet. The original medium in the groove-shaped channel 1301 is propelled into the first part 1302 of the medium outlet under the extrusion of the newly-entered medium.

[0055] FIG. 8 is a schematic structural view showing transient communication via the cave connecting the medium outlet and the side of the third component in the reverse movement direction of the cave. There is a thin section between the medium outlet 13 and the third component. When no cave sitting between them, the medium outlet 13 is not in communication with the side of the third component in the reverse movement direction of the cave. While the cave passes through, the side of the third component in the reverse movement direction of the cave is in transient communication with the medium outlet 13 via the cave. At this time, under the extrusion of the third component, the medium in the cave enters the medium outlet 13 via the portion of the cave 10 that is in communication with the medium outlet.

[0056] FIG. 9 is a schematic structural view showing a scenario of the direct communication all the time between the medium outlet and the side of the third component in the reverse movement direction of the cave. The medium outlet 13 does not have a groove-shaped channel portion. When the cave passes the medium outlet 13 and the third component, the medium extruded from the cave by the third component directly enters the medium outlet 13.