CN113944629A

CN113944629A - High-pressure gear pump

Info

Publication number: CN113944629A
Application number: CN202111332505.4A
Authority: CN
Inventors: 郭勇; 陈桂芳; 谢洪涛; 张子健
Original assignee: Wuxi Peak Hydraulic Co ltd
Current assignee: Wuxi Peak Hydraulic Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-01-18

Abstract

The invention discloses a high-pressure gear pump, aiming at improving the strength of a pump shell and simultaneously not influencing the flow performance of oil liquid in an oil inlet and an oil outlet of the gear pump. Therefore, the high-pressure gear pump provided by the embodiment of the invention comprises a pump shell, a driving gear and a driven gear, wherein the driving gear and the driven gear are installed in an oil cavity of the pump shell, the pump shell is relatively provided with an oil inlet and an oil outlet, the oil inlet and the oil outlet are both communicated with the oil cavity, a first reinforcing rib is arranged on the pump shell and positioned at the outer side of the oil inlet, a second reinforcing rib is arranged on the pump shell and positioned at the outer side of the oil outlet, the oil inlet is a tapered opening gradually decreasing towards the oil cavity, and the oil outlet is a tapered opening gradually increasing towards the oil cavity.

Description

High-pressure gear pump

Technical Field

The invention belongs to the technical field of engineering machinery, and particularly relates to a high-pressure gear pump.

Background

Gear pumps are rotary pumps that deliver or pressurize fluid by virtue of the change in working volume and movement created between a pump cylinder and a meshing gear. When the gears rotate, the volume of the space on the gear disengagement side is changed from small to large to form vacuum to suck liquid, and the volume of the space on the gear engagement side is changed from large to small to squeeze the liquid into the pipeline. However, in the existing gear pump, in order to improve the strength of the pump shell of the gear pump, reinforcing ribs are often arranged in an oil inlet and outlet internal flow passage of the gear pump, but the arrangement of the reinforcing ribs can influence the flow performance of oil in the oil inlet and outlet of the gear pump.

Disclosure of Invention

The invention mainly aims to provide a high-pressure gear pump, aiming at improving the strength of a pump shell and simultaneously not influencing the flow performance of oil liquid in an oil inlet and an oil outlet of the gear pump.

Therefore, the high-pressure gear pump provided by the embodiment of the invention comprises a pump shell, a driving gear and a driven gear, wherein the driving gear and the driven gear are installed in an oil cavity of the pump shell, the pump shell is relatively provided with an oil inlet and an oil outlet, the oil inlet and the oil outlet are both communicated with the oil cavity, a first reinforcing rib is arranged on the pump shell and positioned at the outer side of the oil inlet, a second reinforcing rib is arranged on the pump shell and positioned at the outer side of the oil outlet, the oil inlet is a tapered opening gradually decreasing towards the oil cavity, and the oil outlet is a tapered opening gradually increasing towards the oil cavity.

Specifically, the pump shell comprises a pump body and end covers for sealing two ends of the pump body, and the end covers are fixedly connected with the pump body through bolts.

Specifically, a sealing ring is arranged at the joint of the end cover and the pump body.

Specifically, the driving gear is installed on the driving rotating shaft through a flat key, the driven gear is installed on the driven rotating shaft through a flat key, the driving rotating shaft is driven by a rotating motor located on the outer side of the pump shell, and a hole body for erecting the driving rotating shaft and the driven rotating shaft is arranged on the end cover.

Specifically, the first reinforcing ribs are symmetrically arranged on the upper side and the lower side of the oil inlet, and the second reinforcing ribs are symmetrically arranged on the upper side and the lower side of the oil outlet.

Specifically, the first reinforcing rib and the second reinforcing rib are in arc transition connection with the pump shell.

Specifically, the pump shell is made of nodular cast iron.

Compared with the prior art, at least one embodiment of the invention has the following beneficial effects: the reinforcing ribs are arranged on the outer side of the oil inlet and the oil outlet on the pump shell, so that the strength of the pump shell is improved, and the flowing performance of oil in the oil inlet and the oil outlet cannot be influenced; the oil inlet and the oil outlet are both designed into tapered openings with gradually reduced sections, so that oil has a supercharging effect through the oil inlet and the oil outlet, and the flowing performance of the oil can be improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a high-pressure gear pump provided by an embodiment of the invention;

wherein: 1. a pump housing; 2. a driving gear; 3. a driven gear; 4. an oil chamber; 5. an oil inlet; 6. an oil outlet; 7. a first reinforcing rib; 8. a second reinforcing rib; 9. a base; 10. bolt holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, a high-pressure gear pump, including pump case 1, driving gear 2 and driven gear 3 are installed in the oil cavity 4 of pump case 1, be equipped with oil inlet 5 and oil-out 6 on the pump case 1 relatively, oil inlet 5 and oil-out 6 all communicate with oil cavity 4, the outside department that lies in oil inlet 5 on the pump case 1 is equipped with first strengthening rib 7, the outside department that lies in oil-out 6 on the pump case 1 is equipped with second strengthening rib 8, oil inlet 5 is the bell mouth that diminishes gradually towards oil cavity 4, oil-out 6 is the bell mouth that enlarges gradually towards oil cavity 4.

The gear pump works as follows: when the gear rotates, the volume of the space on the gear disengagement side is increased from small to large, vacuum is formed, oil is sucked into the oil chamber 4 through the oil inlet 5, the volume of the space on the gear engagement side is decreased from large to small, and the oil in the oil chamber 4 is squeezed into a pipeline outside the pump shell 1 from the oil outlet 6.

In the embodiment, the reinforcing ribs are arranged at the outer sides of the oil inlet and outlet 6 on the pump shell 1, so that the strength of the pump shell 1 is improved, and the flowing performance of oil in the oil inlet and outlet 6 is not influenced; the oil inlet 5 and the oil outlet 6 are both designed into tapered openings with gradually reduced cross sections, so that oil has a supercharging effect through the oil inlet 5 and the oil outlet 6, and the flowing performance of the oil can be improved.

In some embodiments, the pump casing 1 includes a pump body and end covers closing two ends of the pump body, the end covers are fastened to the pump body through bolts, and the oil chamber 4 is enclosed by the pump body and the two end covers. Due to the design, the oil chamber 4 can be cleaned by opening the end cover, and the gear replacement is very convenient. In addition, in order to prevent the oil from leaking from the joint of the pump body and the end cover, a sealing ring can be additionally arranged at the joint of the end cover and the pump body.

Referring to fig. 1, it can be understood that, in practical design, the driving gear 2 is installed on the driving rotating shaft through a flat key, the driven gear 3 is installed on the driven rotating shaft through a flat key, the end covers are provided with hole bodies for erecting the driving rotating shaft and the driven rotating shaft, two ends of the driving rotating shaft and two ends of the driven rotating shaft are respectively connected with the corresponding hole bodies on the end covers at two ends of the pump body in a sealing and rotating manner, one end of the driving rotating shaft extends out of the pump shell 1 and then is connected with the rotating motor, and the driving rotating motor drives the driving rotating shaft.

Referring to fig. 1, specifically, in order to further improve the strength of the pump case 1, the first reinforcing ribs 7 are symmetrically arranged on the upper side and the lower side of the oil inlet 5, the second reinforcing ribs 8 are symmetrically arranged on the upper side and the lower side of the oil outlet 6, and the first reinforcing ribs 7 and the second reinforcing ribs 8 are in arc transition connection with the pump case 1. In addition, the casting material of the pump housing 1 may be ductile iron with high strength.

Referring to fig. 1, in some embodiments, a base 9 is integrally formed at the bottom of a pump housing 1, a bolt hole 10 is formed in the base 9, and a connecting bolt penetrates through the bolt hole 10 to be fixedly connected with a mechanical device, so that the whole high-pressure gear pump can be firmly mounted on the mechanical device such as an excavator, a crane, a rotary drilling rig, and the like.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.

Claims

1. The utility model provides a high-pressure gear pump, includes pump case (1), driving gear (2) and driven gear (3) are installed in oil cavity (4) of pump case (1), be equipped with oil inlet (5) and oil-out (6) on pump case (1) relatively, oil inlet (5) with oil-out (6) all with oil cavity (4) intercommunication, its characterized in that: the oil pump is characterized in that a first reinforcing rib (7) is arranged on the pump shell (1) and located at the outer side of the oil inlet (5), a second reinforcing rib (8) is arranged on the pump shell (1) and located at the outer side of the oil outlet (6), the oil inlet (5) is a tapered opening which gradually becomes smaller towards the oil cavity (4), and the oil outlet (6) is a tapered opening which gradually becomes larger towards the oil cavity (4).

2. The high pressure gear pump of claim 1, wherein: the pump shell (1) comprises a pump body and end covers for sealing two ends of the pump body, and the end covers are fixedly connected with the pump body through bolts.

3. The high pressure gear pump of claim 2, wherein: and a sealing ring is arranged at the joint of the end cover and the pump body.

4. The high-pressure gear pump according to claim 2 or 3, characterized in that: the driving gear (2) is installed on the driving rotating shaft through a flat key, the driven gear (3) is installed on the driven rotating shaft through a flat key, the driving rotating shaft is driven by a rotating motor located on the outer side of the pump shell (1), and a hole body for erecting the driving rotating shaft and the driven rotating shaft is arranged on the end cover.

5. The high-pressure gear pump according to claim 2 or 3, characterized in that: the first reinforcing ribs (7) are symmetrically arranged on the upper side and the lower side of the oil inlet (5), and the second reinforcing ribs (8) are symmetrically arranged on the upper side and the lower side of the oil outlet (6).

6. The high-pressure gear pump according to claim 2 or 3, characterized in that: the first reinforcing rib (7) and the second reinforcing rib (8) are in arc transition connection with the pump shell (1).

7. The high-pressure gear pump according to claim 2 or 3, characterized in that: the pump shell (1) is made of a nodular cast iron shell.

8. The high-pressure gear pump according to claim 2 or 3, characterized in that: the pump shell is characterized in that a base (9) is integrally formed at the bottom of the pump shell (1), and a bolt hole (10) is formed in the base (9).