A gear cam pump

Abstract

The present invention provides a gear cam pump, which belongs to the technical field of mechanical pumps, and includes a pump body, a rotor, and an elastic member. The pump body is provided with a pump cavity, and an inlet pipe and an outlet pipe connected to the pump cavity are respectively provided on both side surfaces of the pump body; there are two rotors, and the rotor includes a rotor core and a plurality of blades installed on the rotor core. The rotor core is provided with a plurality of limit grooves, and the plurality of limit grooves are evenly arranged along the circumference of the rotor core, and the length direction of the limit grooves is consistent with the radial direction of the rotor core. The plurality of limit grooves correspond to the plurality of blades one by one, and the blades are slidably connected in the corresponding limit grooves, and each blade is provided with gear teeth, and the blades on the two rotors are meshedly connected. The gear cam pump provided by the present invention uses a meshing connection to prevent the cam pump from getting stuck during operation, and uses an elastic member to reduce the wear between the blades and the hard particles, thereby increasing the service life.

Description

Technical Field

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

[0002] Cam pumps are widely used in petrochemical, daily chemical, pharmaceutical, food and other industries. Therefore, the importance of cam pumps is self-evident. Cam pumps are a multi-purpose bidirectional positive displacement pump and one of the most advanced fluid conveying equipment in the world. They use two synchronously moving rotors. The rotors rotate synchronously in opposite directions under the drive shaft, thereby forming a gap line or surface seal, which constitutes a higher vacuum and discharge pressure. It is particularly suitable for the delivery of food, medicine, corrosive and high-viscosity media. However, when conveying some media with hard particles, the particles are easily stuck between the rotor and the pump body, causing wear and even jamming of the cam pump, reducing the service life of the pump. Summary of the invention

[0003] The embodiment of the present invention provides a gear cam pump to solve the technical problem in the prior art that the cam pump is prone to wear or pump jam when conveying a medium with hard particles.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a gear cam pump, comprising:

[0005] The pump body is provided with a pump cavity, and both sides of the pump body are provided with an inlet pipe and an outlet pipe connected with the pump cavity;

[0006] There are two rotors, both of which are installed in the pump cavity and are rotatably connected to the pump body; the rotor includes a rotor core and a plurality of blades installed on the rotor core, the rotor core is provided with a plurality of limiting grooves, the plurality of limiting grooves are evenly arranged along the circumference of the rotor core, and the length direction of the limiting grooves is consistent with the radial direction of the rotor core; the plurality of limiting grooves correspond to the plurality of blades one by one, and the blades are slidably connected in the corresponding limiting grooves; each of the blades is provided with gear teeth, and the blades on the two rotors are meshed and connected;

[0007] There are multiple elastic members, which are respectively installed in each of the limiting grooves; the elastic member is located at one end of the limiting groove away from the inner wall of the pump chamber; one end of the blade is connected to the elastic member.

[0008] In a possible implementation, the blade includes a blade body and a sliding portion installed at the lower end of the blade body, the sliding portion is connected to the limiting groove and is connected to the elastic member; the thickness of the sliding portion is greater than or equal to the depth of the limiting groove.

[0009] In a possible implementation, a plurality of mounting grooves are provided on the groove side wall of the limiting groove, rollers are provided in the mounting grooves, and the axial direction of the rollers is perpendicular to the sliding direction of the sliding part.

[0010] In a possible implementation, the gear cam pump further includes a bellows, the elastic member is installed in the bellows, and two ends of the bellows are respectively fixedly connected to the blade and the limiting groove.

[0011] In a possible implementation, a sliding gap is provided between the blade and the rotor core; the gear cam pump further includes a folding baffle for sealing the sliding gap and the limiting groove.

[0012] In a possible implementation, the folding baffle includes an elastic folding plate, a baffle and a clamp, the number of the baffles is two, the two baffles are respectively located on both sides of the elastic folding plate, and the length direction of the baffle is consistent with the folding direction of the elastic folding plate, and the baffle is connected to the elastic folding plate; the number of the clamps is two, which are respectively located at both ends of the elastic folding plate and are fixedly connected to the elastic folding plate.

[0013] In a possible implementation, the baffle is made of a flexible material, and is an arc-shaped baffle, and a curvature of the baffle is consistent with a curvature formed by the blade and the rotor core at the sliding gap.

[0014] In a possible implementation, the blade and the rotor core are both provided with slots on one side close to the sliding gap, and both ends of the folding baffle are fixedly mounted in the two slots.

[0015] In a possible implementation, the pump cover is fixedly mounted on the pump body. The pump body is provided with a pump cover, and the pump cover is used to seal the pump chamber.

[0016] In a possible implementation, the pump cover is fixedly mounted on the pump body, a screw hole is provided on the pump body, a through hole coaxially arranged with the screw hole is provided on the pump cover, and the pump cover is detachably connected to the pump body by screws.

[0017] The beneficial effect of a gear cam pump provided by the present invention is that compared with the prior art, when the gear cam pump of the present invention is used, the cam pump is started, and the rotor in the pump body begins to rotate. Since the rotor includes a rotor core and blades mounted on the rotor core, and gear teeth are provided on the blades, the blades of the two rotors are meshed and connected by means of the gear teeth. The number of blades is multiple, and when the blades rotate with the rotor core, the gear teeth and the inner wall of the pump chamber form sealed spaces one by one, and with the help of two rotors rotating in opposite directions, the gear teeth on the blades are continuously separated, the pressure becomes smaller, and thus a vacuum suction force is generated at the inlet pipe, and the sucked-in medium enters the sealed space accordingly. The blades continue to rotate, and the sealed space moves from the left side of the pump chamber to the right side accordingly, and the sealed space moves along with the blades. The blade rotates, thereby opening the right side of the pump chamber, and the gear teeth on the right side are continuously meshed, the pressure increases, and the medium flows out of the sealed space, and then flows out from the outlet pipe on the right; a plurality of limit grooves are arranged evenly along the circumference of the rotor core on the rotor core, and the blades correspond to the limit grooves one by one. Since an elastic member is provided between the blades and the limit grooves, and the blades are slidably connected in the limit grooves, when there are hard particles in the medium, the meshing blades will be deformed due to the extrusion force of the elastic member, so that the blades slide relative to the rotor core, thereby reducing the friction between the hard particles and the blades. In this way, the meshing connection is used to prevent the cam pump from getting stuck during operation, and the elastic member is used to reduce the friction between the blades and the hard particles, thereby reducing wear and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a gear cam pump provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of a rotor provided in an embodiment of the present invention;

[0021] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0022] Figure 4 A schematic diagram of the structure of the blades and the rotor core provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the structure of the sliding portion and the limiting groove provided in an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of the internal structure of the sliding portion and the limiting groove provided in an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the structure of a card slot provided by an embodiment of the present invention;

[0026] Figure 8 A side view of a folding baffle provided by an embodiment of the present invention;

[0027] Fig. 9 A front view of a folding baffle provided by an embodiment of the present invention;

[0028] Fig.10 This is a schematic diagram of the structure of a pump body provided in an embodiment of the present invention.

[0029] Among them, the reference numerals in the figure are:

[0030] 1. Pump body; 11. Pump chamber; 12. Inlet pipe; 13. Outlet pipe; 14. Pump cover; 15. Through hole; 16. Screw; 2. Rotor; 21. Rotor core; 211. Limiting groove; 212. Mounting groove; 213. Roller; 22. Blade; 221. Blade body; 222. Sliding part; 23. Gear teeth; 24. Bellows; 25. Sliding gap; 26. Folding baffle; 261. Elastic folding plate; 262. Baffle; 263. Clamp; 27. Clamping groove; 3. Elastic part. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 intended to limit the present invention.

[0032] 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.

[0033] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] See also Figures 1 to 10 The gear cam pump provided by the present invention is now described. A gear cam pump comprises a pump body 1, a rotor 2 and an elastic member 3. The pump body 1 is provided with a pump cavity 11. The two side surfaces of the pump body 1 are respectively provided with an inlet pipe 12 and an outlet pipe 13 connected with the pump cavity 11. There are two rotors 2, both of which are installed in the pump cavity 11 and are rotatably connected with the pump body 1. The rotor 2 comprises a rotor core 21 and a plurality of blades 22 installed on the rotor core 21. The rotor core 21 is provided with a plurality of limiting grooves 211. The plurality of limiting grooves 211 are evenly arranged along the circumference of the rotor core 21, and the length direction of the limiting grooves 211 is consistent with the radial direction of the rotor core 21. The plurality of limiting grooves 211 correspond to the plurality of blades 22 one by one. The blades 22 are slidably connected in the corresponding limiting grooves 211. Each blade 22 is provided with a gear tooth 23, and the blades 22 on the two rotors 2 are meshed and connected.

[0036] Compared with the prior art, the gear cam pump provided in the present embodiment is different from the prior art in that, when in use, the cam pump is started, and the rotor 2 in the pump body 1 starts to rotate. Since the rotor 2 includes a rotor core 21 and blades 22 mounted on the rotor core 21, and the blades 22 are provided with gear teeth 23, the blades 22 of the two rotors 2 are meshed and connected by means of the gear teeth 23. The number of blades 22 is multiple, and when the blades 22 rotate with the rotor core 21, the gear teeth 23 and the inner wall of the pump chamber 11 form sealed spaces, and with the help of two rotors 2 with opposite rotation directions, the gear teeth 23 on the blades 22 are continuously separated, and the pressure becomes smaller, thereby generating a vacuum suction force at the inlet pipe 12, and the sucked medium enters the sealed space, and the blades 22 continue to rotate, and the sealed space moves from the left side of the pump chamber 11 to the right side, and the sealed space moves with the blades 22 rotates, thereby opening the right side of the pump chamber 11, and the gear teeth 23 on the right side are continuously meshed, the pressure increases, and the medium flows out from the sealed space, and then flows out from the outlet pipe 13 on the right side; a plurality of limiting grooves 211 are provided on the rotor core 21, which are evenly arranged along the circumference of the rotor core 21, and the blades 22 correspond to the limiting grooves 211 one by one. Since an elastic member 3 is provided between the blades 22 and the limiting grooves 211, and the blades 22 are slidably connected in the limiting grooves 211, when there are hard particles in the medium, the meshing blades 22 will be deformed due to the extrusion force of the elastic member 3, so that the blades 22 slide relative to the rotor core 21, thereby reducing the friction between the hard particles and the blades 22. In this way, the meshing connection is used to prevent the cam pump from getting stuck during operation, and the elastic member 3 is used to reduce the wear between the blades 22 and the hard particles, thereby increasing the service life.

[0037] See also Figure 1 , Figure 2 and Figure 4As a specific embodiment of the gear cam pump provided by the present invention, the blade 22 includes a blade body 221 and a sliding portion 222 installed at the lower end of the blade body 221, the sliding portion 222 is connected to the limiting groove 211, and is connected to the elastic member 3, and the thickness of the sliding portion 222 is greater than or equal to the depth of the limiting groove 211; the blade body 221 is provided with gear teeth 23, and the gear teeth 23 are meshed and connected to drive, so that the two rotors 2 rotate synchronously in opposite directions, and thereby form suction at the connection point between the pump chamber 11 and the inlet pipe 12, and the medium is sucked into the sealed space formed by the gear teeth 23 and the pump chamber 11; the sliding portion 222 is installed on the blade body 221 and connected to the limiting groove 211, one end of the elastic member 3 is connected to the sliding portion 222, and the other end is connected to the bottom of the limiting groove 211 When the gear teeth 23 on the blade 22 squeeze the hard particles, since the blade 22 is slidably connected in the limiting groove 211, the blade body 221 is subjected to the reaction force of the hard particles, thereby moving, and the sliding part 222 slides in the limiting groove 211, with the help of the limiting groove 211 and the sliding part 222 connected to the elastic member 3, after the hard particles move to the sealed space, the blade 22 is reset; the thickness of the sliding part 222 is greater than the depth of the limiting groove 211, so that when the sliding part 222 slides in the limiting groove 211, the elastic force of the elastic member 3 that the sliding part 222 can withstand is larger and more stable; in this way, the wear of the gear teeth 23 is reduced and the service life is increased, the elastic force of the elastic member 3 is larger, and the deformation produced is smaller, so it will not hinder the meshing connection of the gear teeth 23.

[0038] See also Figures 4 to 6 As a specific embodiment of the gear cam pump provided by the present invention, a plurality of mounting grooves 212 are provided on the groove side wall of the limiting groove 211, and a roller 213 is provided in the mounting groove 212, and the axial direction of the roller 213 is perpendicular to the sliding direction of the sliding part 222; when encountering hard particles, due to the reaction force generated by the hard particles on the blade 22, the sliding part 222 will slide in the limiting groove 211, and with the help of the roller 213 in the mounting groove 212, the side wall of the sliding part 222 comes into contact with the roller 213, and when the sliding part 222 slides, the roller 213 rotates with the sliding part 222, and in this way, the roller 213 makes the sliding of the sliding part 222 in the limiting groove 211 more stable and smooth.

[0039] See also Figure 4 and Figure 6As a specific embodiment of the gear cam pump provided by the present invention, the gear cam pump also includes a bellows 24, the elastic member 3 is installed in the bellows 24, and the two ends of the bellows 24 are respectively fixedly connected to the blade 22 and the limiting groove 211. When the blade 22 is squeezed and slides relative to the core of the rotor 2, it is easy to have an unstable sliding direction. With the help of the bellows 24 fixedly connected to the sliding part 222 and the limiting groove 211, the two are fixed, and the sliding part 222 can only slide in the limiting groove 211, limiting the movement of the blade 22 in other directions. Due to the retractable characteristics of the bellows 24, when the elastic member 3 is deformed and restored, it will not limit the sliding of the sliding part 222 in the limiting groove 211.

[0040] See also Figure 2 , Figure 3 and Figure 7 As a specific embodiment of the gear cam pump provided by the present invention, there is a sliding gap 25 between the blade 22 and the rotor core 21, and the sliding gap 25 is used to make the blade 22 slide relative to the rotor core 21. When the two rotors 2 rotate, when encountering hard particles, the blade 22 will slide toward the center of the rotor core 21 through the limiting groove 211 and the sliding gap 25, so as to reduce the wear between the hard particles and the blade 22, and with the help of the elastic member 3 between the sliding portion 222 and the limiting groove 211, the blade 22 can also be reset, so that the meshing between the two rotors 2 is not affected, the connection is more stable, and it is ensured that the rotor 2 can rotate stably when encountering hard particles, and there will be no pump jamming; the gear cam pump also includes a folding baffle 26, which is used to seal the sliding gap 25 and the limiting groove 211 to prevent hard particles from entering the sliding gap 25 or the limiting groove 211 and causing the blade 22 to be unable to slide; the elastic member 3 can be a compression spring.

[0041] See also Figure 3 and Figure 8 As a specific embodiment of the gear cam pump provided by the present invention, the folding baffle 26 includes an elastic folding plate 261, a baffle 262 and a clamping head 263. There are two baffles 262, which are respectively located on both sides of the elastic folding plate 261, and the length direction of the baffle 262 is consistent with the folding direction of the elastic folding plate 261. The baffle 262 is connected to the elastic folding plate 261. There are two clamping heads 263, which are respectively located at both ends of the elastic folding plate 261 and fixedly connected to the elastic folding plate 261. When the rotor 2 encounters hard particles during rotation, the hard particles are brought into the sealed space through the sliding of the blade 22 and the limiting groove 211. In order to prevent the hard particles from entering the sliding gap 25 and hindering the sliding of the blade 22, a folding baffle 26 is installed at the sliding gap 25 to prevent the hard particles from entering the sliding gap 25.

[0042] See also Figure 3 and Figure 8 As a specific embodiment of the gear cam pump provided by the present invention, the baffle 262 is made of a flexible material, and the baffle 262 is an arc-shaped baffle 262. The curvature of the baffle 262 is consistent with the curvature formed by the blade 22 and the rotor core 21 at the sliding gap 25. When the blade 22 slides, the sliding gap 25 is reduced accordingly. The sliding gap 25 can be reduced with the help of the elastic folding plate 261. Since the baffle 262 is made of a flexible material, the baffle 262 is reduced accordingly and will not hinder the sliding of the blade 22. The baffle 262 is an arc-shaped baffle 262, and the curvature of the baffle 262 is consistent with the curvature formed by the blade 22 and the rotor core 21 at the sliding gap 25, which ensures that the meshing connection of the gear teeth 23 will not be affected and can work stably.

[0043] See also Figure 3 and Figure 7 As a specific embodiment of the gear cam pump provided by the present invention, a slot 27 is provided on one side of the blade 22 and the rotor core 21 close to the sliding gap 25, and two clamping heads 263 are respectively fixedly installed in the two slots 27; with the help of a folding baffle 26, hard particles are blocked outside the sliding gap 25 to ensure that the blade 22 can slide normally, and a slot 27 is provided on one side of the blade 22 and the rotor core close to the sliding gap 25, and the clamping head 263 is installed in the slot 27 through the clamping heads 263 at both ends of the folding baffle 26, and with the help of the connection between the slot 27 and the clamping head 263, the folding baffle 26 will not fall off and can work normally.

[0044] See also Fig. 9 As a specific embodiment of the gear cam pump provided by the present invention, the pump body 1 is also provided with a pump cover 14, and the pump cover 14 is used to seal the pump chamber 11. The pump cover 14 is opened on the pump body 1, and the pump chamber 11 is sealed. When the cam pump is working, the pump chamber 11 is completely sealed with the help of the pump cover 14, ensuring that the rotor 2 inside the pump chamber 11 is not affected by the outside world and the cleanliness of the rotor 2 is guaranteed.

[0045] See also Figure 1 and Fig. 9 As a specific embodiment of the gear cam pump provided by the present invention, a pump cover 14 is fixedly installed on the pump body 1, a screw hole is opened on the pump body 1, and a through hole 15 coaxially arranged with the screw hole is opened on the pump cover 14. The pump cover 14 and the pump body 1 are detachably connected by screws 16. When the pump chamber 11 is sealed, the pump cover 14 and the pump body 1 are detachably connected and fixed together by the detachable screws 16, so that the cam pump can be extremely conveniently repaired and maintained in the later stage.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gear cam pump, characterized in that: include: The pump body is provided with a pump cavity, and both sides of the pump body are provided with an inlet pipe and an outlet pipe connected with the pump cavity; There are two rotors, both of which are installed in the pump cavity and are rotatably connected to the pump body; the rotor includes a rotor core and a plurality of blades installed on the rotor core, the rotor core is provided with a plurality of limiting grooves, the plurality of limiting grooves are evenly arranged along the circumference of the rotor core, and the length direction of the limiting grooves is consistent with the radial direction of the rotor core; the plurality of limiting grooves correspond to the plurality of blades one by one, and the blades are slidably connected in the corresponding limiting grooves; each of the blades is provided with gear teeth, and the blades on the two rotors are meshed and connected; There are multiple elastic members, which are respectively installed in each of the limiting grooves; the elastic member is located at one end of the limiting groove away from the inner wall of the pump chamber; one end of the blade is connected to the elastic member; There is a sliding gap between the blade and the rotor core; the gear cam pump also includes a folding baffle for sealing the sliding gap and the limiting groove; The folding baffle includes an elastic folding plate, a baffle and a clamp. There are two baffles, which are respectively located on both sides of the elastic folding plate, and the length direction of the baffle is consistent with the folding direction of the elastic folding plate. The baffle is connected to the elastic folding plate; there are two clamps, which are respectively located at both ends of the elastic folding plate and fixedly connected to the elastic folding plate.

2. A gear cam pump as claimed in claim 1, characterized in that: The blade includes a blade body and a sliding part installed at the lower end of the blade body, the sliding part is connected to the limiting groove and is connected to the elastic member; the thickness of the sliding part is greater than or equal to the depth of the limiting groove.

3. A gear cam pump as claimed in claim 2, characterized in that: A plurality of mounting grooves are arranged on the groove side wall of the limiting groove, rollers are arranged in the mounting grooves, and the axial direction of the rollers is perpendicular to the sliding direction of the sliding part.

4. A gear cam pump as claimed in claim 1, characterized in that: The gear cam pump further comprises a bellows, the elastic member is installed in the bellows, and two ends of the bellows are respectively fixedly connected to the blades and the limiting grooves.

5. A gear cam pump as claimed in claim 1, characterized in that: The baffle is made of a flexible material and is an arc-shaped baffle, and the curvature of the baffle is consistent with the curvature formed by the blade and the rotor core at the sliding gap.

6. A gear cam pump as claimed in claim 1, characterized in that: A clamping groove is provided on one side of the blade and the rotor core close to the sliding gap, and the two clamping heads are respectively fixedly installed in the two clamping grooves.

7. A gear cam pump as claimed in claim 1, characterized in that: The pump body is provided with a pump cover, and the pump cover is used for sealing the pump cavity.

8. A gear cam pump as claimed in claim 7, characterized in that: The pump cover is fixedly mounted on the pump body. The pump body is provided with a screw hole. The pump cover is provided with a through hole coaxially arranged with the screw hole. The pump cover is detachably connected to the pump body by screws.

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