A gear pump

Abstract

A gear pump provided by the present invention belongs to the technical field of mechanical pumps and includes a pump body, a rotor, an elastomer, and an elastic member. The pump body is provided with an accommodation cavity, and an inlet pipe and an outlet pipe are arranged on both side surfaces of the pump body; the rotor includes a rotor core and a plurality of meshing teeth. A plurality of first installation grooves are provided on the rotor core. The meshing teeth include a tooth body and a meshing head. The meshing teeth are provided with a first groove, and the meshing teeth on two rotors are meshingly connected; the elastomer is installed in each first installation groove; the elastic member is installed in each first groove. For the gear pump provided by the present invention, by means of the meshing head and the elastic member, when encountering smaller particles, it slides in the first groove to reduce wear, and when encountering larger particles, it uses the meshing teeth and the elastomer to slide in the first installation groove to reduce wear and increase the service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical pumps, and particularly relates to a gear pump. Background Art

[0002] Gear pumps are generally applied in occasions such as petroleum, chemical industry, and mechanical engineering. A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquids or increase their pressure. It consists of two gears, a pump body, and front and rear covers to form two closed spaces. When the gears rotate, the volume of the space on the side where the gears disengage changes from small to large, creating a vacuum to suck in the liquid, and the volume of the space on the side where the gears mesh changes from large to small to squeeze the liquid into the pipeline. However, when transporting some media with hard particles, the particles vary in size and are easily stuck in the gaps between the teeth and the pump body, causing wear of the gear pump and reducing the service life of the pump. Summary of the Invention

[0003] An embodiment of the present invention provides a gear pump to solve the technical problem in the prior art that the gear pump is prone to wear when transporting a medium with hard particles of different sizes.

[0004] To achieve the above object, the technical solution adopted by the present invention is: providing a gear pump, including:

[0005] A pump body, which is provided with an accommodation cavity, and an inlet pipe and an outlet pipe communicating with the accommodation cavity are respectively arranged on two side surfaces of the pump body;

[0006] Two rotors, both of which are installed in the accommodation cavity and rotatably connected to the accommodation cavity; each rotor includes a rotor core and a plurality of meshing teeth, a plurality of first installation grooves are provided on the rotor core, and the plurality of first installation grooves are uniformly arranged along the circumferential direction of the rotor core, and each meshing tooth is slidably connected in each first installation groove; the meshing tooth includes a tooth body and a meshing head, a first groove is opened on the upper end surface of the meshing tooth, and the meshing head is slidably connected in the first groove; the meshing teeth on the two rotors are meshingly connected;

[0007] A plurality of elastic bodies, which are respectively installed in each first installation groove; the elastic body is located at one end of the first installation groove away from the inner wall of the accommodation cavity, and one end of the meshing tooth is connected to the elastic body;

[0008] A plurality of elastic members, which are respectively installed in each first groove; the elastic member is located at one end of the first groove away from the inner wall of the accommodation cavity, and one end of the meshing head is connected to the elastic member.

[0009] In a possible implementation, a clamp is provided on the engaging head; a limiting groove is provided on the inner wall of the first groove, the clamp is slidably connected in the limiting groove, and the clamp has the freedom to move up and down along the limiting groove.

[0010] In a possible implementation, the engagement head is an arc-shaped engagement head; and the plurality of elastic members are arranged in a straight line array along the length direction of the first groove.

[0011] In a possible implementation, a limiting flange is provided in the first installation groove to limit the moving distance of the meshing gear teeth.

[0012] In a possible implementation, a disassembly groove is formed at one end of the meshing gear close to the elastic body, and one end of the elastic body is connected to the disassembly groove.

[0013] In a possible implementation, a card slot is defined in the disassembly slot, and the number of the card slots is two, each of which is located at one end of the inner wall of the disassembly slot away from the elastic body.

[0014] In a possible implementation, the elastomer includes an elastic body and a torsion clamp; the elastic body is provided with a second groove and a fixing groove, the number of the second grooves is two and they are located on both sides of the elastic body, the number of the fixing grooves is two and they are located below the second groove, the torsion clamp is installed on the elastic body and is located between the second groove and the fixing groove, and is used to limit the meshing gear teeth in the first installation groove.

[0015] In a possible implementation, the torsion chuck includes a fixing frame, a chuck body and a torsion spring, the fixing frame is fixed on the elastic body, the chuck body is rotatably connected to the fixing frame, the torsion spring is installed on the rotating shaft of the chuck body, and the two ends of the torsion spring are respectively connected to the elastic body and the chuck body; the chuck body is provided with an inclined guide surface and a driving connection surface located below the inclined guide surface, the inclined guide surface is used to connect with the meshing gear teeth entering the first mounting groove from top to bottom, and the chuck body enters the fixing groove, the driving connection surface is used to connect with the meshing gear teeth detached from the first mounting groove from bottom to top, and the chuck body enters the second groove.

[0016] In a possible implementation, the fixing frame includes a crossbeam and two support rods fixed at both ends of the crossbeam, one end of the clamp body is installed between the two support rods and is rotatably connected to the two support rods; the torsion spring is installed between the clamp body and the support rods.

[0017] In a possible implementation, a flexible filler is provided between two adjacent engaging gear teeth on the same rotor.

[0018] The beneficial effects of a gear pump provided by the present invention are as follows: Compared with the prior art, when the gear pump of the present invention is in use, the gear pump is started, and the two rotors in the pump body rotate. The engaging gear teeth on the two rotor cores start to engage and rotate with each other. During the rotation of the engaging gear teeth, a series of sealed spaces are formed with the inner wall of the accommodating cavity. At the left-side engagement of the two rotors, as the engaging gear teeth continuously engage, the engaging gear teeth of the two rotors continuously separate, thereby forming an additional volume. As the volume increases, the pressure here decreases, and a vacuum suction force is formed at the inlet pipe, thereby sucking the medium entering from the inlet pipe into the sealed space formed by the engaging head of the engaging gear teeth and the inner wall of the accommodating cavity. The rotor continues to rotate, and the sealed space moves from the left side of the accommodating cavity to the right side accordingly. And as the two rotors rotate, the engaging gear teeth continuously engage with each other on the right side, and the volume here continuously decreases and the pressure increases, so that the medium is squeezed out from the sealed space and then flows out from the outlet pipe on the right side. When there are hard particles in the medium, the engaging head first contacts and squeezes the hard particles. Since the engaging head is slidably connected to the first groove and an elastic member is installed between the two, the engaging head slides in the first groove by means of the elastic member to reduce wear. When the hard particles are relatively large and the elastic member is compressed to the minimum state, the engaging gear teeth will be squeezed, and the engaging gear teeth will slide in the first installation groove. At the same time, with the help of the elastic force of the elastic body, the wear between the engaging head and the inner wall of the accommodating cavity is further reduced. In this way, first, the engaging head and the elastic member are used to slide in the first groove to reduce wear when encountering smaller particles. When encountering larger particles, the engaging gear teeth and the elastic body are used to slide in the first installation groove to reduce wear, thereby increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of the gear pump provided by the embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of the rotor provided by the embodiment of the present invention;

[0022] Figure 3 is a front view of the engaging gear teeth provided by the embodiment of the present invention;

[0023] Figure 4 is Figure 3 the enlarged view of position A in

[0024] Figure 5 the side view of the meshing gear teeth provided by the embodiment of the present invention;

[0025] Figure 6 the structural schematic diagram of the meshing gear teeth and the rotor core provided by the embodiment of the present invention;

[0026] Figure 7 the partial sectional view of the meshing gear teeth and the rotor core provided by the embodiment of the present invention;

[0027] Figure 8 the structural schematic diagram of the elastomer provided by the embodiment of the present invention;

[0028] Figure 9 the structural schematic diagram of the torsion chuck provided by the embodiment of the present invention;

[0029] Figure 10 the sectional view of the torsion chuck provided by the embodiment of the present invention;

[0030] Figure 11 the structural schematic diagram of the installation of the meshing gear teeth provided by the embodiment of the present invention;

[0031] Figure 12 the structural schematic diagram of the disassembly of the meshing gear teeth provided by the embodiment of the present invention.

[0032] Among them, the reference numerals in the figure are as follows:

[0033] 1, pump body; 11, accommodation cavity; 12, inlet pipeline; 13, outlet pipeline; 2, rotor; 21, rotor core; 211, first installation groove; 212, limiting flange; 22, meshing gear teeth; 221, gear tooth body; 222, meshing head; 223, chuck; 224, first groove; 225, limiting groove; 226, disassembly and installation groove; 227, clamping groove; 228, driving connection surface; 3, elastomer; 31, elastic body; 311, second groove; 312, fixing groove; 32, torsion chuck; 321, fixing frame; 3211, cross beam; 3212, support rod; 322, chuck body; 3221, rotating shaft; 3222, inclined guiding surface; 323, torsion spring; 4, elastic member; 5, flexible filler. Detailed implementation manners

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0038] Please refer to Figures 1 to 12 , and now the gear pump provided by the present invention will be described. A gear pump includes a pump body 1, a rotor 2, an elastomer 3, and an elastic member 4. The pump body 1 is provided with an accommodation cavity 11. An inlet pipe 12 and an outlet pipe 13 communicating with the accommodation cavity 11 are respectively provided on both side surfaces of the pump body 1. The number of rotors 2 is two, both are installed in the accommodation cavity 11 and are rotatably connected to the accommodation cavity 11. The rotor 2 includes a rotor core 21 and a plurality of meshing teeth 22. A plurality of first installation grooves 211 are provided on the rotor core 21. The plurality of first installation grooves 211 are uniformly arranged along the circumferential direction of the rotor core 21. Each meshing tooth 22 is slidably connected in each first installation groove 211. The meshing tooth 22 includes a tooth body 221 and a meshing head 222. A first groove 224 is provided on the upper end surface of the meshing tooth 22. The meshing head 222 is slidably connected in the first groove 224. The meshing teeth 22 on the two rotors 2 are meshingly connected. The number of elastomers 3 is a plurality, and they are respectively installed in each first installation groove 211. The elastomer 3 is located at one end of the first installation groove 211 away from the inner wall of the accommodation cavity 11. One end of the meshing tooth 22 is connected to the elastomer 3. The number of elastic members 4 is a plurality, and they are respectively installed in each first groove 224. The elastic member 4 is located at one end of the first groove 224 away from the inner wall of the accommodation cavity 11. One end of the meshing head 222 is connected to the elastic member 4.

[0039] Compared with the prior art, the gear pump provided in this embodiment, when in use, starts the gear pump, and the two rotors 2 in the pump body 1 rotate. The meshing teeth 22 on the two rotor cores 21 start to mesh and rotate with each other. During the rotation of the meshing teeth 22, a series of sealed spaces are formed with the inner wall of the accommodation cavity 11. At the left meshing part of the two rotors 2, as the meshing teeth 22 continuously mesh, the meshing teeth 22 of the two rotors 2 continuously separate, thus forming an additional volume. As the volume increases, the pressure here decreases, and a vacuum suction force is formed at the inlet pipe 12. Then, the medium entering from the inlet pipe 12 is sucked into the sealed space formed by the meshing head 222 of the meshing teeth 22 and the inner wall of the accommodation cavity 11. The rotor 2 continues to rotate, and the sealed space moves from the left side of the accommodation cavity 11 to the right side. And as the two rotors 2 rotate, the meshing teeth 22 continuously mesh with each other on the right side, the volume here continuously decreases, and the pressure increases, so that the medium is squeezed out of the sealed space and then flows out from the outlet pipe 13 on the right side. When there are hard particles in the medium, the meshing head 222 first contacts and squeezes the hard particles. Since the meshing head 222 is slidably connected in the first groove 224 and an elastic member 4 is installed between the two, the meshing head 222 slides in the first groove 224 by means of the elastic member 4 to reduce wear. When the hard particles are relatively large and the elastic member 4 is compressed to the minimum state, the meshing teeth 22 will be squeezed, and the meshing teeth 22 will slide in the first installation groove 211. At the same time, with the elastic force of the elastic body 3, the wear between the meshing head 222 and the inner wall of the accommodation cavity 11 is further reduced. In this way, first, when encountering smaller particles, the meshing head 222 and the elastic member 4 slide in the first groove 224 to reduce wear. When encountering larger particles, the meshing teeth 22 and the elastic body 3 slide in the first installation groove 211 to reduce wear, thereby increasing the service life.

[0040] Please refer to Figures 2 to 5 , as a specific implementation manner of the gear pump provided by the present invention, a chuck 223 is provided on the meshing head 222, a limiting groove 225 is formed on the inner wall of the first groove 224, the chuck 223 is slidably connected in the limiting groove 225, and the chuck 223 has the freedom to move up and down along the limiting groove 225; one end of the elastic member 4 is connected to the lower end of the meshing head 222, and the other end is installed on the bottom surface of the first groove 224. When the meshing head 222 squeezes the hard particles, the meshing head 222 slides in the first groove 224 by means of the reaction force and deforms the elastic member 4. When passing through the hard particles, the compressed elastic member 4 resumes its original shape, and at the same time, the meshing head 222 resets and continues to contact the inner wall of the accommodation cavity 11. During this process, the chuck 223 is restricted by the limiting groove 225, so that after the elastic member 4 resumes its original shape, the meshing head 222 will not fall off the meshing teeth 22 due to the sudden restoration of the elastic member 4, ensuring that the meshing head 222 can continue to work normally.

[0041] See also Figures 2 to 5 As a specific embodiment of the gear pump provided by the present invention, the meshing head 222 is arc-shaped, and multiple elastic members 4 are arranged in a straight array along the length direction of the first groove 224; when the rotor 2 rotates, the meshing head 222 contacts the accommodating chamber 11 to form a sealed space, so the arc-shaped meshing head 222 contacts the inner wall of the accommodating chamber 11, which can reduce the wear between the two and increase the service life; multiple elastic members 4 are arranged in a straight array along the length direction of the first groove 224, and when the meshing head 222 is subjected to the reaction force of the hard particles, the multiple elastic members 4 are deformed at the same time, ensuring that the meshing head 222 will not be tilted due to uneven force, thereby increasing the wear on the inner wall of the accommodating chamber 11.

[0042] See also Figure 6 and Figure 7 As a specific embodiment of the gear pump provided by the present invention, a limiting flange 212 is provided in the first mounting groove 211 for limiting the moving distance of the meshing gear 22. When the meshing gear 22 squeezes larger hard particles, the elastic member 4 transmits the extrusion force received to the elastomer 3 through the meshing gear 22. The elastomer 3 is extruded and deformed, so that the meshing gear 22 slides in the first mounting groove 211. When it slides, with the help of the limiting flange 212 and the first mounting groove 211, it can only slide up and down and cannot move in other directions. Moreover, the elastomer 3 will only be subjected to the extrusion force perpendicular to the bottom surface of the first mounting groove 211, thereby ensuring that the elastomer 3 can work stably.

[0043] See also Figure 6 and Figure 7 As a specific embodiment of the gear pump provided by the present invention, a disassembly groove 226 is provided at one end of the meshing gear 22 close to the elastic body 3, and one end of the elastic body 3 is connected to the disassembly groove 226. When a meshing gear 22 is worn and cannot continue to work, the meshing gear 22 can be very conveniently removed from the first installation groove 211 with the help of the disassembly groove 226. During installation, it can also be quickly installed with the help of the elastic body 3 and the disassembly groove 226.

[0044] See also Figures 6 to 9 As a specific embodiment of the gear pump provided by the present invention, a card slot 227 is opened in the unloading groove 226. There are two card slots 227, which are respectively located at one end of the inner wall of the unloading groove 226 away from the elastomer 3. The meshing gear 22 is fixed on the elastomer 3 by means of the card slot 227, and the movement of the meshing gear 22 is restricted by the first mounting groove 211, so that it can only slide up and down in the first mounting groove 211. The card slot 227 is used to prevent the meshing gear 22 from falling off due to the deformation of the elastomer 3 when the meshing gear 22 is squeezed.

[0045] See alsoFigures 8 to 12 , as a specific embodiment of the gear pump provided by the present invention, the elastomer 3 includes an elastic body 31 and a torsion chuck 32. The elastic body 31 is provided with a second groove 311 and a fixing groove 312. The number of the second grooves 311 is two and they are located on both sides of the elastic body 31. The number of the fixing grooves 312 is two and they are located below the second grooves 311. The torsion chuck 32 is installed on the elastic body 31 and is located between the second groove 311 and the fixing groove 312 for limiting the meshing tooth 22 in the first installation groove 211. After the meshing tooth 22 is installed, the torsion chuck 32 is stuck in the clamping groove 227 to prevent the elastomer 3 from being squeezed and causing the meshing tooth 22 to become loose. When the elastomer 3 is squeezed and deformed, by virtue of the elastic force of the elastic body 31 itself, the meshing tooth 22 is squeezed and slides in the first installation groove 211, so as to reduce the wear of the meshing tooth 22 caused by hard particles.

[0046] Please refer to Figures 8 to 12 , as a specific embodiment of the gear pump provided by the present invention, the torsion chuck 32 includes a fixing frame 321, a chuck body 322 and a torsion spring 323. The fixing frame 321 is fixed on the elastic body 31. The chuck body 322 is rotatably connected to the fixing frame 321. The torsion spring 323 is installed on the rotating shaft 3221 of the chuck body 322, and the two ends of the torsion spring 323 are respectively connected to the elastic body 31 and the chuck body 322. An inclined guiding surface 3222 and a driving connection surface 228 located below the inclined guiding surface 3222 are provided on the chuck body 322. The inclined guiding surface 3222 is used to connect with the meshing tooth 22 entering the first installation groove 211 from top to bottom, and the chuck body 322 enters the fixing groove 312. The driving connection surface 228 is used to connect with the meshing tooth 22 disengaging from the first installation groove 211 from bottom to top, and the chuck body 322 enters the second groove 311. When disassembling the meshing tooth 22, a force is applied to the meshing tooth 22 away from the first installation groove 211. At this time, the torsion chuck 32 is subjected to a squeezing force and turns upward by means of the inclined guiding surface 3222 and enters the second groove 311. At this time, the meshing tooth 22 can be disassembled, and then the torsion chuck 32 resets. Similarly, when installing the meshing tooth 22, a force is applied to the meshing tooth 22 close to the first installation groove 211. At this time, the torsion chuck 32 is subjected to a squeezing force and turns downward by means of the driving connection surface 228 and enters the fixing groove 312, and the torsion chuck 32 slides on the driving connection surface 228. When the meshing tooth 22 is installed, the torsion chuck 32 resets and is stuck in the clamping groove 227. With the dismounting groove 226 and the elastomer 3, the meshing tooth 22 can be installed and disassembled quickly and conveniently.

[0047] Please refer to Figures 8 to 12, as a specific embodiment of the gear pump provided by the present invention, the fixing frame 321 includes a cross beam 3211 and two support rods 3212 fixedly arranged at both ends of the cross beam 3211. One end of the chuck body 322 is installed between the two support rods 3212 and is rotatably connected to the two support rods 3212. The torsion spring 323 is installed between the chuck body 322 and the support rods 3212. In this way, when the chuck body 322 rotates, it can slide better on the inner wall of the unloading groove 226. With the help of the torsion spring 323, when the force acting on the chuck body 322 disappears, the torsion spring 323, relying on the fixed connection between the support rods 3212 and the chuck body 322, enables the torsion spring 323 to quickly recover after deformation.

[0048] Please refer to Figure 1 and Figure 2 , as a specific embodiment of the gear pump provided by the present invention, a flexible filler 5 is arranged between two adjacent meshing teeth 22 on the same rotor 2. After the meshing teeth 22 on the two rotors 2 are meshed, since the flexible filler 5 is very easy to deform and recover, the meshing connection can be made unaffected, and the wear between the meshing teeth 22 can also be reduced.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gear pump, characterized in that, it comprises: a pump body provided with a receiving cavity, and an inlet pipe and an outlet pipe communicating with the receiving cavity are respectively arranged on two side surfaces of the pump body; two rotors, both installed in the receiving cavity and rotatably connected to the receiving cavity; each rotor includes a rotor core and a plurality of meshing teeth, a plurality of first mounting grooves are provided on the rotor core, and the plurality of first mounting grooves are uniformly arranged along the circumferential direction of the rotor core, and each meshing tooth is slidably connected in each first mounting groove; the meshing tooth includes a tooth body and a meshing head, a first groove is opened on the upper end surface of the meshing tooth, and the meshing head is slidably connected in the first groove; the meshing teeth on the two rotors are meshingly connected; a plurality of elastic bodies, respectively installed in each of the first mounting grooves; the elastic bodies are located at one end of the first mounting grooves away from the inner wall of the receiving cavity, and one end of the meshing teeth is connected to the elastic bodies; a plurality of elastic members, respectively installed in each of the first grooves; the elastic members are located at one end of the first grooves away from the inner wall of the receiving cavity, and one end of the meshing head is connected to the elastic members; the elastic body includes an elastic body and a torsion chuck; the elastic body is provided with two second grooves and two fixing grooves, the two second grooves are located on both sides of the elastic body, the two fixing grooves are located below the second grooves, and the torsion chuck is installed on the elastic body and located between the second grooves and the fixing grooves for limiting the meshing teeth in the first mounting grooves.

2. The gear pump according to claim 1, characterized in that, a chuck is provided on the meshing head; a limiting groove is opened on the inner wall of the first groove, the chuck is slidably connected in the limiting groove, and the chuck has a degree of freedom to move up and down along the limiting groove.

3. The gear pump according to claim 1, characterized in that, the meshing head is an arc-shaped meshing head; a plurality of elastic members are arranged in a linear array along the length direction of the first groove.

4. The gear pump according to claim 1, characterized in that, a limiting flange is opened in the first mounting groove for limiting the moving distance of the meshing teeth.

5. The gear pump according to claim 1, characterized in that, a disassembly groove is opened at one end of the meshing tooth close to the elastic body, and one end of the elastic body is connected to the disassembly groove.

6. The gear pump according to claim 5, characterized in that, a clamping groove is opened in the disassembly groove, and the number of the clamping grooves is two, which are respectively located at one end of the inner wall of the disassembly groove away from the elastic body.

7. The gear pump according to claim 1, characterized in that, The torsion chuck includes a fixing frame, a chuck body and a torsion spring. The fixing frame is fixedly arranged on the elastic body. The chuck body is rotatably connected to the fixing frame. The torsion spring is installed on the rotating shaft of the chuck body, and both ends of the torsion spring are respectively connected to the elastic body and the chuck body. An inclined guiding surface and a driving connection surface located below the inclined guiding surface are provided on the chuck body. The inclined guiding surface is used for connecting with the meshing gear teeth entering the first installation groove from top to bottom, and when the chuck body enters the fixing groove, the driving connection surface is used for connecting with the meshing gear teeth disengaging from the first installation groove from bottom to top, and when the chuck body enters the second groove.

8. A gear pump according to claim 7, characterized in that the fixing frame includes a cross beam and two support rods fixedly arranged at both ends of the cross beam. One end of the chuck body is installed between the two support rods and is rotatably connected to the two support rods. The torsion spring is installed between the chuck body and the support rods.

9. A gear pump according to claim 1, characterized in that a flexible filler is provided between two adjacent meshing gear teeth on the same rotor.

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