Small-size gear pump

Abstract

A small-size gear pump comprises a gear pump protection shell, a sealing cover arranged at one end of the gear pump protection shell and a gear assembly contained in the gear pump protection shell. The gear pump protection shell comprises a gear pump shell, a containing cavity formed in the gear pump shell, a feeding port formed in the side wall of the gear pump shell and communicated with the containing cavity, and a discharging port formed in the side wall of the gear pump shell. And the connecting channel is arranged between the accommodating cavity and the discharge hole. The outer contour of the connecting channel is in an inverted U shape, and the feeding port and the discharging port are formed in the same side of the gear pump shell. According to the small-size gear pump, the feeding port and the discharging port are formed in the same side, pipeline connection can be conveniently carried out on the space-limited occasion, the pipeline trend does not need to be excessively adjusted, and the installation space is saved.

Description

Technical Field

[0001] This utility model belongs to the technical field of gear pump equipment, and in particular a small-volume gear pump. Background Technology

[0002] A gear pump mainly consists of a pair of meshing gears, a pump body, a pump cover, and a drive shaft. The two gears are mounted on bearings on either side, and the gear shaft, mounted on the bearings, is driven by an electric motor. The pump body and pump cover form a closed cavity; when the gears rotate, the fluid within this cavity is transported.

[0003] For example, the Chinese patent for a rubber gear pump, application number CN202310304072.4, includes a pump body, a gear set, two pressure plates, and two support plates. The pump body has an inner cavity, with an inlet and an outlet on each side. The gear set is located within the inner cavity and includes two parallel, meshing gear shafts. It is evident that the inlet and outlet are located on opposite sides of the pump body. However, because the inlet and outlet are on separate sides, the pump body's lateral dimensions need to be sufficient to accommodate two independent fluid channels. This layout significantly increases the overall size of the gear pump, especially for small equipment or space-constrained locations. Its large size makes compact arrangement difficult, limiting its application in confined spaces and failing to meet user needs. Utility Model Content

[0004] In view of this, the present invention provides a space-saving, compact gear pump to meet industrial needs.

[0005] A small-volume gear pump includes a gear pump protective housing, a sealing cover disposed at one end of the gear pump protective housing, and a gear assembly housed within the gear pump protective housing. The gear pump protective housing includes a gear pump casing, a receiving cavity disposed within the gear pump casing, a feed inlet disposed on the side wall of the gear pump casing and communicating with the receiving cavity, a discharge outlet disposed on the side wall of the gear pump casing, and a connecting channel disposed between the receiving cavity and the discharge outlet. The outer contour of the connecting channel is inverted "U" shape, and the feed inlet and the discharge outlet are located on the same side of the gear pump casing.

[0006] Furthermore, the cross-sectional outer contour of the accommodating cavity is an isosceles trapezoid, with the wide end of the isosceles trapezoid facing the connecting channel.

[0007] Furthermore, all corners of the connecting channel are rounded.

[0008] Furthermore, the gear pump housing includes a gear pump housing body, a sealing groove disposed on one end of the gear pump housing body facing the sealing cover, and a sealing ring disposed in the sealing groove.

[0009] Furthermore, the gear assembly includes a driving gear rotatably connected to the accommodating cavity and a driven gear rotatably connected to the accommodating cavity and meshing with one side of the driving gear.

[0010] Furthermore, the gear pump protective housing also includes a feed pipe connected to the feed inlet and a discharge pipe disposed on the discharge outlet.

[0011] Compared with existing technologies, the small-volume gear pump provided by this utility model guides the fluid in the accommodating cavity to the discharge port through the connecting channel of the gear pump protective shell. The outer contour of the connecting channel is an inverted "U" shape, which adjusts the discharge direction of the accommodating cavity, so that the inlet and the discharge port are located on the same side of the gear pump shell. Therefore, this small-volume gear pump achieves the same-side arrangement of the inlet and outlet, facilitating pipe connections in space-constrained situations without excessive adjustments to the pipe routing, thus saving installation space. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of the small-volume gear pump provided by this utility model.

[0013] Figure 2 for Figure 1 A cross-sectional structural diagram of a small-volume gear pump.

[0014] Figure 3 for Figure 2 A partially enlarged structural diagram of a small-volume gear pump at point A.

[0015] Figure 4 for Figure 1 A cross-sectional structural diagram of a small-volume gear pump from another perspective. Detailed Implementation

[0016] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0017] like Figures 1 to 4The diagram shown is a structural schematic of the small-volume gear pump provided by this utility model. The small-volume gear pump includes a gear pump protective housing 10, a sealing cover 20 disposed at one end of the gear pump protective housing 10, and a gear assembly 30 housed within the gear pump protective housing 10. The small-volume gear pump also includes other functional modules, such as assembly components, etc., which should be known to those skilled in the art and will not be described in detail here.

[0018] The gear pump protective housing 10 includes a gear pump housing 11, a receiving cavity 12 disposed within the gear pump housing 11, a feed inlet 13 disposed on the side wall of the gear pump housing 11 and communicating with the receiving cavity 12, a discharge outlet 14 disposed on the side wall of the gear pump housing 11, a connecting channel 15 disposed between the receiving cavity 12 and the discharge outlet 14, a feed pipe 16 connected to the feed inlet 13, and a discharge pipe 17 disposed on the discharge outlet 14.

[0019] The gear pump housing 11 is used to protect the gear assembly 30 and to make the gear pump protective shell 10 and the gear assembly 30 form an integral whole. The connection structure between the gear pump housing 11 and the gear assembly 30 is a prior art and will not be described in detail here.

[0020] The gear pump housing 11 includes a gear pump housing body 111, a sealing groove 112 disposed on one end of the gear pump housing body 111 facing the sealing cover 20, and a sealing ring 113 disposed within the sealing groove 112. The sealing groove 112 is used to restrict the position of the sealing ring 113, thereby the sealing ring 113 improves the sealing effect between the gear pump housing 11 and the sealing cover 20.

[0021] One end of the receiving cavity 12 is connected to one end of the gear pump housing 11. The receiving cavity 12 is used to house the gear assembly 30, which rotates within the receiving cavity 12, allowing fluid to flow from the inlet 13 to the connecting channel 15. The outer contour of the cross-section of the receiving cavity 12 is an isosceles trapezoid, and the inlet 13 is connected to the side wall of the isosceles trapezoid. The wide end of the isosceles trapezoid faces the connecting channel 15. The shape of the isosceles trapezoid facilitates the flow of fluid within the receiving cavity 12 to the connecting channel 15, thereby improving the operating efficiency of the pump.

[0022] The inlet 13 is used to guide fluid into the accommodating cavity 12, and the outlet 14 is used to guide the fluid in the connecting channel 15 out. Both the inlet 13 and the outlet 14 are existing technologies and will not be described in detail here.

[0023] The connecting channel 15 and the receiving cavity 12 are integrally formed. The connecting channel 15 guides the fluid in the receiving cavity 12 to the discharge port 14. The outer contour of the connecting channel 15 is an inverted "U" shape, which means that the connecting channel 15 adjusts the discharge direction of the receiving cavity 12, so that the inlet 13 and the discharge port 14 are located on the same side of the gear pump housing 11, which facilitates pipeline connection in space-constrained situations. In addition, the corners of the connecting channel 15 are all rounded to achieve a smooth transition at the corners of the connecting channel 15, which facilitates the flow of fluid in the connecting channel 15.

[0024] The feed pipe 16 is used to transfer fluid into the feed port 13, and the discharge pipe 17 is used to guide the fluid flowing out of the discharge port 14 to the outside. The connection structure between the feed pipe 16 and the feed port 13, and the connection structure between the discharge pipe 17 and the discharge port 14 are all existing technologies and will not be described in detail here.

[0025] The sealing cover 20 is used to close one end of the receiving cavity 12 in the gear pump housing 11. By installing or removing the sealing cover 20, the gear assembly 30 housed in the receiving cavity 12 can be installed and maintained. The connection structure between the sealing cover 20 and the gear pump housing 11 is a prior art and will not be described in detail here.

[0026] The gear assembly 30 includes a drive gear 31 rotatably connected to the accommodating cavity 12 and a driven gear 32 rotatably connected to the accommodating cavity 12 and meshing with one side of the drive gear 31.

[0027] A shaft 33 is mounted on the drive gear 31, passing through the upper cover 12. The shaft 33 is connected to a motor (not shown), enabling the rotation of both the drive gear 31 and the driven gear 32. The connection structure between the shaft 33 and the motor is existing technology. When the gear pump starts operating, the motor drives the drive gear 31 to rotate, which in turn drives the driven gear 32 to rotate synchronously. During the rotation of the driven gear 32 by the drive gear 31, two distinct regions are created. In front of the rotation direction of the drive gear 31 and driven gear 32, they gradually disengage, creating a localized vacuum environment in the suction chamber. Under atmospheric pressure, fluid is forced into the suction chamber and carried between the drive gear 31 and driven gear 32 as the gears rotate. When the driving gear 31 and the driven gear 32 engage, the fluid is discharged from the discharge chamber. The meshing structure of the driving gear 31 and the driven gear 32 is existing technology and will not be described in detail here.

[0028] Compared with the prior art, the small-volume gear pump provided by this utility model guides the fluid in the accommodating cavity 12 to the discharge port 14 through the connecting channel 15 of the gear pump protective shell 10. The outer contour of the connecting channel 15 is an inverted "U" shape, which means that the connecting channel 15 adjusts the discharge direction of the accommodating cavity 12, so that the inlet 13 and the discharge port 14 are located on the same side of the gear pump shell 11. It can be seen that the small-volume gear pump provided achieves the inlet and outlet ports being located on the same side, which facilitates pipeline connection in space-constrained situations, eliminates the need for excessive adjustment of pipeline routing, and saves installation space.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A small-volume gear pump, characterized in that: The small-volume gear pump includes a gear pump protective shell, a sealing cover disposed at one end of the gear pump protective shell, and a gear assembly housed within the gear pump protective shell. The gear pump protective shell includes a gear pump housing, a receiving cavity disposed within the gear pump housing, a feed inlet disposed on the side wall of the gear pump housing and communicating with the receiving cavity, a discharge outlet disposed on the side wall of the gear pump housing, and a connecting channel disposed between the receiving cavity and the discharge outlet. The outer contour of the connecting channel is inverted "U" shape. The feed inlet and the discharge outlet are disposed on the same side of the gear pump housing.

2. The small-volume gear pump as described in claim 1, characterized in that: The cross-sectional outer contour of the accommodating cavity is an isosceles trapezoid, with the wide end of the isosceles trapezoid facing the connecting channel.

3. The small-volume gear pump as described in claim 1, characterized in that: All corners of the connecting channels are rounded.

4. The small-volume gear pump as described in claim 1, characterized in that: The gear pump housing includes a gear pump housing body, a sealing groove disposed on one end of the gear pump housing body facing the sealing cover, and a sealing ring disposed in the sealing groove.

5. The small-volume gear pump as described in claim 1, characterized in that: The gear assembly includes a driving gear rotatably connected to the accommodating cavity and a driven gear rotatably connected to the accommodating cavity and meshing with one side of the driving gear.

6. The small-volume gear pump as described in claim 1, characterized in that: The gear pump protective housing also includes a feed pipe connected to the feed inlet and a discharge pipe disposed at the discharge outlet.

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