Gear pump with packing seal and external cooling

Abstract

This utility model relates to the field of gear pump technology, specifically disclosing a gear pump with external cooling of the packing seal, including a pump body and a main shaft. A drive gear is fixedly installed on one end of the surface of the main shaft. A sealing shell is fixedly installed on the surface of the pump body. A packing groove is formed on the surface of the sealing shell. A liquid delivery chamber is formed inside the sealing shell. A cover is fixedly installed on the surface of the sealing shell. A circulation tank is fixedly installed on the surface of the pump body. A cooling component is slidably installed on the surface of the main shaft. Coolant is added into the circulation tank. When the pump body drives the main shaft to rotate, the coolant can be delivered to the inside of the packing groove through the meshing between the drive gear and the driven gear, thereby cooling the first and second sealing packing. The provided outlet pipe and return pipe can circulate the coolant, thereby improving the cooling effect and preventing the first and second sealing packing from getting too hot and affecting the sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of gear pump technology, specifically a gear pump with externally cooled packing seal. Background Technology

[0002] Gear pumps are rotary pumps that rely on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport or pressurize liquids. Their main structure consists of two gears, a pump body, and front and rear covers forming two enclosed spaces. As the gears rotate, the volume of the space on the disengaged side of the gears increases from small to large, creating a vacuum that draws in the liquid. The volume of the space on the meshing side of the gears decreases from large to small, discharging the liquid into the pipe. The sealing packing is a key component used at the shaft seal of the gear pump. Its function is to prevent leakage of the medium inside the pump and ensure the normal operation of the pump.

[0003] When a gear pump is working, the main shaft is constantly rotating, which causes the sealing packing of the gear pump to rub against the main shaft, resulting in particularly high heat. Excessive heat can easily damage the effectiveness of the sealing mechanism, causing the internal liquid of the gear pump to leak out. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a gear pump with externally cooled packing seals, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gear pump with packing seal and external cooling, comprising a pump body and a main shaft. A threaded hole is formed on the outer surface of the main shaft, and a screw is installed inside the threaded hole. A drive gear is fixedly installed at one end of the main shaft surface. A sealing shell is fixedly installed on the surface of the pump body. A packing groove is formed on the surface of the sealing shell. A liquid delivery chamber is formed inside the sealing shell. A first sealing packing material with a matching shape is installed inside the packing groove. A sealing ring fitted onto the surface of the main shaft is installed inside the liquid delivery chamber. A cover is fixedly installed on the surface of the sealing shell. A positioning groove is formed at the rear end of the cover. A second sealing packing material with a matching shape is installed inside the positioning groove. A circulation tank is fixedly installed on the surface of the pump body. An outlet pipe and a return pipe are fixedly connected to one side of the circulation tank. A cooling component is slidably installed on the surface of the main shaft.

[0006] Preferably, the spindle rotates through the interior of the sealing shell, and both the first sealing packing and the second sealing packing are sleeved on the outer surface of the spindle.

[0007] Preferably, the driving gear is disposed inside the infusion chamber, and a driven gear is rotatably mounted inside the infusion chamber, with the bottom of the driven gear meshing with the top of the driving gear.

[0008] Preferably, one end of the outlet pipe is connected to the interior of the infusion chamber, one end of the return pipe is connected to the interior of the packing trough, and a liquid guide pipe is fixedly installed on one side of the outer wall of the sealing shell, with both ends of the liquid guide pipe connected to the interior of the packing trough and the infusion chamber, respectively.

[0009] Preferably, heat-conducting fins are fixedly installed on the surface of the circulation box, and the rear end of the heat-conducting fins is connected to the interior of the circulation box.

[0010] Preferably, the cooling assembly comprises a sleeve and fan blades, wherein the top of the sleeve has an insertion hole and the sleeve is slidably fitted onto the surface of the spindle.

[0011] Preferably, the screw rotates through the interior of the insertion hole, and the bottom end of the screw is threadedly connected to the inner wall of the threaded hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, by adding coolant into the circulation tank, when the pump body drives the main shaft to rotate, the coolant can be delivered to the stuffing groove through the meshing between the drive gear and the driven gear, thereby cooling the first and second sealing packings. The provided outlet pipe and return pipe enable the coolant to circulate, thereby improving the cooling effect and preventing the first and second sealing packings from getting too hot and affecting the sealing effect.

[0013] In this invention, by installing a cooling component on the surface of the spindle, the spindle drives the fan blades to rotate, which can increase the airflow around the circulation box. One end of the heat-conducting fins is located inside the circulation box and in contact with the coolant, which can cool the coolant and prevent the coolant temperature from becoming too high due to prolonged use, thus affecting the subsequent cooling effect. Attached Figure Description

[0014] Figure 1 This utility model presents a three-dimensional structural diagram of the main body of a gear pump with external cooling and a packing seal. Figure 2 This utility model provides a three-dimensional structural diagram of the sealing shell of a gear pump with external cooling and packing seal. Figure 3 This utility model provides a schematic diagram of the disassembled structure of a cooling component for a gear pump with external cooling of a packing seal. Figure 4 This utility model provides a schematic diagram of the internal structure of the sealing shell of a gear pump with external cooling and a packing seal. Figure 5 This utility model provides a schematic diagram of the rear end structure of the baffle of a gear pump with external cooling and packing seal. Figure 6This utility model presents a top view cross-sectional structural diagram of the sealing shell of a gear pump with external cooling and packing seal.

[0015] In the diagram: 1. Pump body; 11. Main shaft; 111. Threaded hole; 12. Screw; 13. Drive gear; 14. Sealing ring; 2. Sealing shell; 201. Packing groove; 202. Infusion chamber; 21. First sealing packing; 22. Liquid guide pipe; 23. Driven gear; 3. Cover; 301. Positioning groove; 31. Second sealing packing; 4. Circulation tank; 41. Discharge pipe; 42. Return pipe; 43. Heat-conducting fins; 5. Cooling assembly; 51. Sleeve; 511. Insertion hole; 52. Fan blade. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1 like Figures 1-6 As shown, this utility model provides a technical solution: a gear pump with packing seal and external cooling, including a pump body 1 and a main shaft 11. A threaded hole 111 is formed on the outer surface of the main shaft 11, and a screw 12 is installed inside the threaded hole 111. A drive gear 13 is fixedly installed at one end of the surface of the main shaft 11. A sealing shell 2 is fixedly installed on the surface of the pump body 1. A packing groove 201 is formed on the surface of the sealing shell 2. A liquid delivery chamber 202 is formed inside the sealing shell 2. A first sealing packing 21 with a matching shape is installed inside the packing groove 201. A sealing ring 14 fitted onto the surface of the main shaft 11 is installed inside the liquid delivery chamber 202. A cover 3 is fixedly installed on the surface of the sealing shell 2. A positioning groove 301 is formed at the rear end of the cover 3. A second sealing packing 31 with a matching shape is installed inside the positioning groove 301. The pump body 1... A circulation tank 4 is fixedly installed on the surface. An outlet pipe 41 and a return pipe 42 are fixedly connected to one side of the circulation tank 4. A cooling component 5 is slidably installed on the surface of the main shaft 11. The main shaft 11 rotates through the interior of the sealing shell 2. The first sealing packing 21 and the second sealing packing 31 are both sleeved on the outer surface of the main shaft 11. The driving gear 13 is set inside the infusion chamber 202. A driven gear 23 is rotatably installed inside the infusion chamber 202. The bottom of the driven gear 23 meshes with the top of the driving gear 13. One end of the outlet pipe 41 is connected to the interior of the infusion chamber 202. One end of the return pipe 42 is connected to the interior of the packing groove 201. A liquid guide pipe 22 is fixedly installed on one side of the outer wall of the sealing shell 2. The two ends of the liquid guide pipe 22 are connected to the interior of the packing groove 201 and the infusion chamber 202, respectively.

[0018] In this embodiment, coolant is stored by adding it to the circulation tank 4, and the outlet pipe 41 transports the coolant to the delivery chamber 202. The meshing of the drive gear 13 and driven gear 23 drives the pump body 1 to rotate the main shaft 11 during operation, causing both the drive gear 13 and driven gear 23 to rotate together. This creates suction within the delivery chamber 202, which transports and transfers the coolant. The sealing ring 14 prevents leakage of the liquid transported inside the pump body 1, and the direct contact between the coolant and the sealing ring 14 cools it. The liquid guide pipe 22 further cools the coolant. The coolant is fed into the packing trough 201. The cover 3 is fixed to the surface of the sealing shell 2 with fixing bolts to cover and seal it. The first sealing packing 21 and the second sealing packing 31 both wrap and seal the main shaft 11, which can prevent the liquid and coolant in the pump body 1 from leaking. The coolant flowing into the packing trough 201 can cool the first sealing packing 21 and the second sealing packing 31, avoiding excessive heat generated by friction with the main shaft 11, which would reduce the sealing effect. The set return pipe 42 can transport the coolant back into the circulation box 4 for reuse, thereby ensuring continuous cooling of the first sealing packing 21 and the second sealing packing 31.

[0019] Example 2 like Figures 1-6 As shown, heat-conducting fins 43 are fixedly installed on the surface of the circulation box 4. The rear end of the heat-conducting fins 43 is connected to the interior of the circulation box 4. The cooling assembly 5 consists of a sleeve 51 and a fan blade 52. The top of the sleeve 51 is provided with a plug hole 511. The sleeve 51 is slidably sleeved on the surface of the main shaft 11. The screw 12 rotates through the interior of the plug hole 511. The bottom end of the screw 12 is threadedly connected to the inner wall of the threaded hole 111.

[0020] In this embodiment, the sleeve 51 is slidably fitted onto the surface of the spindle 11 to facilitate the installation and positioning of the cooling component 5. The insertion hole 511 is aligned with the threaded hole 111. A screw 12 is used to pass through the insertion hole 511 and connect between the threaded holes 111, which can install and fix the cooling component 5 on the surface of the spindle 11. When the spindle 11 is running, it can drive the cooling component 5 to rotate together. The rotation of the fan blade 52 can increase the surrounding airflow. The heat-conducting fins 43 are in direct contact with the coolant. When the coolant heats up, the heat-conducting fins 43 can transfer the heat in the coolant, thereby cooling the coolant and preventing the coolant temperature from becoming too high due to prolonged use, which would affect the subsequent cooling effect.

[0021] Working principle: By adding coolant into the circulation tank 4, the pump body 1 operates with the main shaft 11 rotating, driving the drive gear 13 to rotate. The drive gear 13 meshes with the driven gear 23, causing them to rotate together. At this time, there is suction inside the delivery chamber 202, which draws out the coolant and delivers it into the packing trough 201 through the guide pipe 22. The sealing ring 14 seals the delivery chamber 202, and the first sealing packing 21 and the second sealing packing 31 seal the packing trough 201. The coolant flows from inside the delivery chamber 202 to the packing trough. In the tank 201, the coolant directly contacts the sealing ring 14, the first sealing packing 21, and the second sealing packing 31 for heat exchange, which can cool them down and prevent the continuous friction with the spindle 11 from generating heat and reducing the sealing effect. The cooling component 5 is installed on the surface of the spindle 11. The spindle 11 can increase the surrounding airflow by driving the cooling component 5 to blow the heat-conducting fins 43, thereby accelerating the heat dissipation effect of the heat-conducting fins 43. When the coolant temperature is too high, it can cool the coolant, thereby ensuring the continuous operation of the cooling effect.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gear pump with externally cooled packing seal, characterized in that: The pump includes a pump body (1) and a main shaft (11). A threaded hole (111) is provided on the outer surface of the main shaft (11), and a screw (12) is installed inside the threaded hole (111). A drive gear (13) is fixedly installed at one end of the surface of the main shaft (11). A sealing shell (2) is fixedly installed on the surface of the pump body (1). A packing groove (201) is provided on the surface of the sealing shell (2), and an infusion chamber (202) is provided inside the sealing shell (2). A first sealing packing (21) with a matching shape is provided inside the packing groove (201). The infusion chamber (202) is provided with a sealing ring (14) fitted onto the surface of the main shaft (11). A cover (3) is fixedly installed on the surface of the sealing shell (2). A positioning groove (301) is provided at the rear end of the cover (3). A second sealing packing (31) with a matching shape is provided inside the positioning groove (301). A circulation box (4) is fixedly installed on the surface of the pump body (1). An outlet pipe (41) and a return pipe (42) are fixedly connected to one side of the circulation box (4). A cooling component (5) is slidably installed on the surface of the main shaft (11).

2. A gear pump with externally cooled packing seal according to claim 1, characterized in that: The main shaft (11) rotates through the interior of the sealing shell (2), and the first sealing packing (21) and the second sealing packing (31) are both sleeved on the outer surface of the main shaft (11).

3. A gear pump with externally cooled packing seal according to claim 1, characterized in that: The driving gear (13) is located inside the infusion chamber (202), and the driven gear (23) is rotatably installed inside the infusion chamber (202). The bottom of the driven gear (23) meshes with the top of the driving gear (13).

4. A gear pump with externally cooled packing seal according to claim 1, characterized in that: One end of the outlet pipe (41) is connected to the inside of the infusion chamber (202), and one end of the return pipe (42) is connected to the inside of the packing groove (201). A guide pipe (22) is fixedly installed on one side of the outer wall of the sealing shell (2). The two ends of the guide pipe (22) are connected to the inside of the packing groove (201) and the infusion chamber (202), respectively.

5. A gear pump with externally cooled packing seal according to claim 1, characterized in that: The surface of the circulation box (4) is fixedly equipped with heat-conducting fins (43), and the rear end of the heat-conducting fins (43) is connected to the interior of the circulation box (4).

6. A gear pump with externally cooled packing seal according to claim 1, characterized in that: The cooling component (5) consists of a sleeve (51) and a fan blade (52). The top of the sleeve (51) is provided with a plug hole (511), and the sleeve (51) is slidably sleeved on the surface of the main shaft (11).

7. A gear pump with externally cooled packing seal according to claim 1, characterized in that: The screw (12) rotates through the interior of the insertion hole (511), and the bottom end of the screw (12) is threadedly connected to the inner wall of the threaded hole (111).

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