Internally geared gear pump with pressure relief channel

Abstract

The utility model relates to the technical field of internal gear pump, especially an internal gear pump with pressure relief channel, including pump body and pump cover, the front end of pump body is installed with pump cover through sealing washer, the lower extreme of pump body is fixedly connected with base, the front end left and right sides of pump cover all are fixedly connected with pressure relief pipe, the outer wall of pressure relief pipe is installed with pressure valve, the outer wall right side of pump body is installed with joint assembly, the upper portion of joint pipe in joint assembly is installed with auxiliary assembly. Through the cooperation between pump body, sharp head rod and curved partition, the liquid is not directly collided with pump body gear when pumping into the pump body, a certain degree of axial rotation is generated, the impact force of the pumped liquid is dispersed to the axial direction, the problem that the impact force of the liquid is directly acted on the pump body gear due to the direct alignment of the liquid inlet pipe to the pump body gear in the existing internal gear pump, resulting in the surface abrasion or corrosion under long-term use is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of internal gear pump technology, specifically an internal gear pump with a pressure relief channel. Background Technology

[0002] In the field of hydraulic systems, internal gear pumps are widely used due to their advantages such as compact structure and uniform flow. The core working principle of a gear pump is to achieve oil suction and oil pressure through the rotation of a pair of meshing gears. For example, an internal gear pump with a pressure relief channel with application number "202520519194.X" includes a housing, which includes a working chamber, an oil inlet and an oil outlet.

[0003] However, although it can improve the heat dissipation and lubrication of the bearing, existing internal gear pumps have problems such as wear or corrosion of the lower surface due to the liquid impact force acting directly on the pump body gears because the inlet pipe is directly aligned with the pump body gears. Furthermore, there is no effective indication of the specific installation direction when installing the connector pipe, and the connecting bolts may loosen during pump operation. Utility Model Content

[0004] The purpose of this invention is to solve the problems of the internal gear pump of the device, where the liquid inlet pipe is directly aligned with the pump body gear, causing the impact force of the liquid to act directly on the pump body gear, resulting in wear or corrosion on the lower surface after long-term use, and the lack of effective guidance on the specific installation direction when installing the connector pipe, and the possibility of the connecting bolts loosening during pump operation. Therefore, this invention proposes an internal gear pump with a pressure relief channel.

[0005] To achieve the above objectives, this utility model provides the following technical solution: Design an internal gear pump with a pressure relief channel, including a pump body and a pump cover. The pump cover is installed at the front end of the pump body through a sealing gasket. A base is fixedly connected to the lower end of the pump body. Pressure relief pipes are fixedly connected to the left and right sides of the front end of the pump cover. A pressure valve is installed on the outer wall of the pressure relief pipe. A connector assembly is installed on the right side of the outer wall of the pump body. An auxiliary component is installed on the upper part of the connector pipe in the connector assembly.

[0006] Preferably, the connector assembly includes a connector tube, the left outer wall of which is fixedly connected to the pump body by bolts, a flange is fixedly connected to the right outer wall of the connector tube, a pointed rod is provided at the center of the inner wall of the connector tube, and the outer wall of the pointed rod is fixedly connected to the connector tube by multiple curved partitions.

[0007] This feature: Through the design of the pointed rod and the curved baffle, the pointed rod can divert the liquid outward, while the curved baffle can guide the liquid to generate a vortex before entering the pump body, so that the liquid does not directly collide with the pump body gear when it enters the pump body, but generates a certain degree of axial rotation, so that the impact force of the pumped liquid is dispersed axially.

[0008] Preferably, the plurality of the curved partitions are centrally symmetrically distributed along the axis of the pointed rod.

[0009] Preferably, the upper and lower sides of the inner wall of the pump body are rotatably connected to the shaft of the pump body gear through sealed bearings, and the pump body gears on the upper and lower sides mesh with each other.

[0010] This setting works as follows: When the pump body gears rotate, the meshing tooth grooves create a vacuum in the suction chamber, drawing liquid into the pump body. The liquid is carried by the tooth grooves and transported from the suction chamber to the pressure chamber as the gears rotate. The meshing of the gears in the pressure chamber reduces the volume of the tooth grooves, squeezing the liquid out and completing the delivery process.

[0011] Preferably, the auxiliary component includes a sleeve, which is fixedly connected to the upper center of the connector tube. The inner wall of the sleeve is machined with a tapered groove, and a tapered rod is pressed against the inner wall of the tapered groove. One end of the tapered rod is fixedly connected to the pump body, and indicator arrows are fixedly connected to both the front and rear sides of the outer wall of the sleeve.

[0012] This feature: The design of the tapered rod and tapered groove allows the tapered rod to be aligned with the tapered groove during installation. At this time, the direction of the connector tube can only be that the pointed end of the rod faces outward. Due to the tight fit between the tapered rod and the tapered groove, after the connector tube is installed with the pump body by bolts, the tightness between the tapered rod and the tapered groove can also limit the shaking of the connector tube when the pump body starts working.

[0013] Preferably, the rear side of the shaft of the pump body gear described below is fixedly connected to the main shaft, and a flat key is machined at the end of the outer wall of the main shaft.

[0014] Preferably, the pump body and the pump cover are fixedly connected by multiple bolts.

[0015] The internal gear pump with a pressure relief channel proposed in this utility model has the following advantages: Through the cooperation between the pump body, the pointed rod, and the curved baffle, the liquid is transported into the pump body through the inlet pipe. The pointed rod and the curved baffle installed on the inner wall of the connector pipe allow the pointed rod to divert the liquid outward. At the same time, the curved baffle can guide the liquid to generate a vortex before entering the pump body, so that the liquid does not directly collide with the pump body gear when it enters the pump body, but generates a certain degree of axial rotation. This disperses the impact force of the pumped liquid axially, effectively avoiding the problem of the impact force of the liquid acting directly on the pump body gear due to the inlet pipe being directly aligned with the pump body gear in existing internal gear pumps, which leads to wear or corrosion of the lower surface of the pump body gear after long-term use. The fit between the tapered rod, tapered groove, connector tube, pointed rod, and pump body ensures that the tapered rod is aligned with the tapered groove during installation. The connector tube must be oriented with the pointed rod facing outwards. Indicator arrows provide clear guidance. Furthermore, the tight fit between the tapered rod and tapered groove limits the connector tube's movement during pump startup after bolt installation, reducing the possibility of loose bolts. This effectively avoids situations where there is no clear indication of the installation direction and the bolts may loosen during pump operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the present utility model; Figure 2 This is a schematic diagram of the rear appearance structure of this utility model; Figure 3 This utility model Figure 1 A schematic diagram of a partial cross-sectional structure in the diagram; Figure 4 This is a schematic diagram of the structure of the connector pipe of this utility model; Figure 5 This is a partial cross-sectional view of the connector pipe of this utility model; Figure 6 This utility model Figure 3 A schematic diagram of the structure at point I in the diagram.

[0017] In the diagram: 1. Pump body, 2. Pump cover, 3. Auxiliary components, 301. Sleeve, 302. Tapered rod, 303. Indicator arrow, 304. Tapered groove, 4. Connector assembly, 401. Connector pipe, 402. Pointed rod, 403. Flange, 404. Bending partition, 5. Bolt, 6. Base, 7. Pressure relief pipe, 8. Pressure valve, 9. Main shaft, 10. Flat key, 11. Pump body gear. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: See attached document Figure 1-6 In this embodiment, an internal gear pump with a pressure relief channel includes a pump body 1 and a pump cover 2. The pump cover 2 is installed at the front end of the pump body 1 through a sealing gasket. A base 6 is fixedly connected to the lower end of the pump body 1. Pressure relief pipes 7 are fixedly connected to both the left and right sides of the front end of the pump cover 2. The specific pressure relief process is provided by the two pressure relief pipes 7. When the pressure in the cavities on both sides of the pump body 1 is abnormal, the pressure of the internal liquid can break through the pressure valve 8, causing the pressure relief pipes 7 to open and flow, thus releasing the internal pressure of the pump body 1. If collection is required, it can also be connected to a collection pipe through the flange at the end of the pressure relief pipe 7. The outer wall of the pressure relief pipe 7 is fitted with a... The pump body 1 is equipped with a pressure valve 8. A connector assembly 4 is installed on the right side of the outer wall of the pump body 1. An auxiliary assembly 3 is installed on the upper part of the connector pipe 401 in the connector assembly 4. The model of the pump body 1 can be determined according to the specific application. The upper and lower sides of the inner wall of the pump body 1 are rotatably connected to the shaft of the pump body gear 11 through sealed bearings, and the upper and lower sides of the pump body gear 11 mesh with each other. The rear side of the shaft of the lower pump body gear 11 is fixedly connected to the main shaft 9. A flat key 10 is machined at the end of the outer wall of the main shaft 9. The flat key 10 facilitates the connection of the main shaft 9 to an external power source. The pump body 1 and the pump cover 2 are fixedly connected by multiple bolts 5.

[0019] See attached document Figure 1-6 In this embodiment, the connector assembly 4 includes a connector pipe 401. The left outer wall of the connector pipe 401 is fixedly connected to the pump body 1 by bolts. A flange 403 is fixedly connected to the right side of the outer wall of the connector pipe 401. A pointed rod 402 is provided at the center of the inner wall of the connector pipe 401. The pointed rod 402 is used to divert the flow when it flows with the liquid. The outer wall of the pointed rod 402 is fixedly connected to the connector pipe 401 by multiple curved baffles 404. The multiple curved baffles 404 are centrally symmetrically distributed along the axis of the pointed rod 402. The curved baffles 404 cause the liquid to generate eddies when it flows through, converting part of the liquid flow impact force into axial rotation force.

[0020] See attached document Figure 1-6 In this embodiment, the auxiliary component 3 includes a sleeve 301, which is fixedly connected to the upper center of the connector tube 401. The tapered rod 302 is aligned with the tapered groove 304 for installation. At this time, the connector tube 401 can only be in the state where the pointed rod 402 faces outward. The indicator arrow 303 can also provide effective guidance. The inner wall of the sleeve 301 is machined with a tapered groove 304. The tightness between the tapered rod 302 and the tapered groove 304 can also limit the shaking of the connector tube 401 when the pump body starts working. The inner wall of the tapered groove 304 is pressed against the tapered rod 302. One end of the tapered rod 302 is fixedly connected to the pump body 1. Indicator arrows 303 are fixedly connected to both the front and rear sides of the outer wall of the sleeve 301.

[0021] Working principle: When this internal gear pump with a pressure relief channel is needed, the user can connect the entire device to an external pipeline and install the connector pipe 401 in the correct position according to the direction of the pipeline. The connector pipe 401 needs to be installed on the liquid inlet side, and then the pipeline connection is completed through flanges or other structures. In actual use, the external power structure drives the main shaft 9 to rotate, which in turn drives the pump body gears 11 on both sides to rotate, realizing the pumping of liquid from one side to the other (this process is existing technology; simply put, when the gears rotate, the meshing grooves create a vacuum in the suction chamber, drawing the liquid into the pump body. The liquid is carried by the grooves and transported from the suction chamber to the pressure chamber as the gears rotate. The meshing of the gears on the pressure chamber side reduces the volume of the grooves, and the liquid is squeezed out, completing the transport).

[0022] In practical use, as the inlet pipe transports the liquid into the pump body 1, the pointed rod 402 and the curved baffle 404 installed on the inner wall of the connector pipe 401 allow the pointed rod 402 to divert the liquid outwards. At the same time, the curved baffle 404 can guide the liquid to generate a vortex before entering the pump body 1, so that the liquid does not directly collide with the pump body gear when it enters the pump body, but generates a certain degree of axial rotation, so that the impact force of the pumped liquid is dispersed axially. This effectively avoids the problem of the impact force of the liquid acting directly on the pump body gear due to the inlet pipe being directly aligned with the pump body gear in existing internal gear pumps, which leads to wear or corrosion of the lower surface of the pump body gear after long-term use.

[0023] Meanwhile, during installation, since the pointed rod 402 must be installed facing the inlet pipe for diversion, this design includes a tapered rod 302 and a tapered groove 304. During installation, the tapered rod 302 must be aligned with the tapered groove 304. At this point, the connector tube 401 must be positioned with the pointed rod 402 facing outwards. The indicator arrow 303 also provides effective guidance. Furthermore, the tight fit between the tapered rod 302 and the tapered groove 304 ensures that after the connector tube 401 is bolted to the pump body 1, the tightness between the tapered rod 302 and the tapered groove 304 limits the shaking of the connector tube 401 during pump startup, reducing the possibility of loosening the connecting bolts. This effectively avoids the situation where there is no clear indication of the installation direction during connector tube installation and the connecting bolts may loosen during pump operation.

[0024] The specific pressure relief process is provided by two pressure relief pipes 7. When the pressure in the cavities on both sides of the pump body 1 is abnormal, the pressure of the internal liquid can break through the pressure valve 8, causing the pressure relief pipe 7 to open and flow, releasing the internal pressure of the pump body 1. If collection is required, it can also be connected to a collection pipe through the flange at the end of the pressure relief pipe 7.

[0025] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An internal gear pump with a pressure relief channel, comprising a pump body (1) and a pump cover (2), wherein the pump cover (2) is mounted on the front end of the pump body (1) via a sealing gasket, characterized in that: The lower end of the pump body (1) is fixedly connected to a base (6). The front end of the pump cover (2) is fixedly connected to the left and right sides of the pressure relief pipe (7). The outer wall of the pressure relief pipe (7) is equipped with a pressure valve (8). The right side of the outer wall of the pump body (1) is equipped with a connector assembly (4). The upper part of the connector pipe (401) in the connector assembly (4) is equipped with an auxiliary assembly (3). The auxiliary assembly (3) includes a sleeve (301). The sleeve (301) is fixedly connected to the upper center of the connector pipe (401). The inner wall of the sleeve (301) is machined with a conical groove (304). The inner wall of the conical groove (304) is pressed against a conical rod (302). One end of the conical rod (302) is fixedly connected to the pump body (1). The front and rear sides of the outer wall of the sleeve (301) are fixedly connected with indicator arrows (303).

2. The internal gear pump with a pressure relief channel according to claim 1, characterized in that: The connector assembly (4) includes a connector tube (401). The left outer wall of the connector tube (401) can be fixedly connected to the pump body (1) by bolts. A flange (403) is fixedly connected to the right side of the outer wall of the connector tube (401). A pointed rod (402) is provided at the center of the inner wall of the connector tube (401). The outer wall of the pointed rod (402) is fixedly connected to the connector tube (401) by multiple curved partitions (404).

3. The internal gear pump with a pressure relief channel according to claim 2, characterized in that: The multiple curved partitions (404) are centrally symmetrically distributed along the axis of the pointed rod (402).

4. The internal gear pump with a pressure relief channel according to claim 1, characterized in that: The upper and lower sides of the inner wall of the pump body (1) are rotatably connected to the shaft of the pump body gear (11) through sealed bearings, and the pump body gears (11) on the upper and lower sides mesh with each other.

5. The internal gear pump with a pressure relief channel according to claim 4, characterized in that: The rear side of the shaft of the pump body gear (11) is fixedly connected to the main shaft (9), and a flat key (10) is machined at the end of the outer wall of the main shaft (9).

6. The internal gear pump with a pressure relief channel according to claim 1, characterized in that: The pump body (1) and the pump cover (2) are fixedly connected by multiple bolts (5).

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