Elastomer cam rotor structure capable of completely isolating medium

Abstract

The utility model discloses an elastomer cam rotor structure capable of completely isolating a medium. The elastomer cam rotor structure comprises a pump body, a feeding pipe and a discharging pipe which are communicated with each other are symmetrically arranged on two sides of the pump body; sealing heads are arranged at two ends of the pump body; a first shaft rod and a second shaft rod are rotationally connected into the pump body. A first shaft rod and a second shaft rod which are arranged up and down are rotationally connected into the pump body; the first shaft rod and the second shaft rod are respectively and fixedly connected with a cam rotor; the three convex parts of the cam rotor are also provided with rubber coating layers; water or gas is conveyed into the cam rotor in two different modes, high-temperature steam or hot water exchanges heat with the cam rotor, and then heat is transmitted to a rubber coating layer of an outer convex part of the cam rotor through heat transfer, so that the temperature of the rubber coating layer is increased, and elasticity and flexibility are recovered; and a series of problems such as embrittlement cracking and adhesive force reduction are avoided, so that the medium isolation effect of the cam rotor is maintained, the service life is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of cam rotor pump accessories, specifically, it relates to an elastic cam rotor structure that completely isolates the medium. Background Technology

[0002] A cam rotor is a rotor with a special non-circular profile that generates uneven driving force during rotation, thereby performing specific mechanical actions to drive and control the movement in pumps or mechanical devices. In a cam rotor pump, the special shape of the cam, by cooperating with the rotor, changes the rotor's trajectory within the pump chamber, creating volume changes and thus driving the intake and discharge of fluid. The design of the cam rotor enables it to provide smooth motion and efficient fluid delivery during rotation, making it widely used in equipment requiring precise flow rates and high pressures.

[0003] Because there is usually significant friction between the cam rotor and the pump body, prolonged operation increases energy loss and leads to component wear, thereby reducing the overall system's service life and stability. Furthermore, the cam rotor structure requires high sealing and precision fitting. Generally, the larger the gap between the cam rotor and the pump body wall, or between two cam rotors, the worse the sealing effect and tightness, resulting in poor airtightness, serious leakage problems, and affecting the material conveying efficiency of the cam rotor pump.

[0004] Patent CN207830119U discloses a cam rotor, comprising a cam rotor and a coating layer. Each lug and recess of the cam rotor is provided with a boss or groove. The coating layer is tightly fixed to the boss or groove. The coating layer is located on the outer edge of the cam rotor and is consistent with the curvature of the lug and recess of the cam rotor. This provides a novel cam rotor that is highly practical, low in cost, and ensures a tight bond between the coating layer and the cam rotor.

[0005] However, in the above-mentioned technical solutions, the rubber coating of the rotor may exhibit a series of defects in low-temperature environments. Due to the reduced temperature, the elasticity and flexibility of the rubber layer decrease, potentially leading to hardening, embrittlement, or even cracking or peeling, affecting the media isolation effect of the cam rotor. Furthermore, low temperatures may also reduce the adhesion between the rubber layer and the rotor substrate, thereby affecting the pump's sealing performance and operational efficiency. Damage to the rubber coating may result in fluid leakage, reduced pump efficiency, and even accelerated wear on the rotor and pump body, thus impacting the long-term reliability and safety of the equipment. Utility Model Content

[0006] This invention provides an elastomer cam rotor structure that completely isolates the medium, aiming to solve the technical problem that the rubber coating of the rotor is easily damaged in low-temperature environments.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A completely media-isolated elastomeric cam rotor structure includes a pump body; a feed pipe and a discharge pipe are symmetrically arranged on both sides of the pump body; end caps are provided at both ends of the pump body; a first shaft and a second shaft are rotatably connected inside the pump body; a first shaft and a second shaft arranged vertically are rotatably connected inside the pump body; a cam rotor is fixedly connected to the first shaft and the second shaft respectively; three external protrusions of the cam rotor are also provided with an adhesive coating layer; a heating component is provided inside the cam rotor.

[0009] Furthermore, the heating assembly includes three spiral tubes embedded inside the cam rotor; and the three spiral tubes are respectively located on the outer protrusion of the cam rotor; both ends of the spiral tubes are respectively fixedly connected to a hollow disc; the two hollow discs, on opposite sides, are respectively fixedly connected to a connecting air inlet pipe and an air outlet pipe, with the air outlet pipe being closer to the motor side.

[0010] Furthermore, the first shaft and the second shaft extend to both ends of the pump body; the inlet pipe and the outlet pipe are both located inside the shaft; a hollow tube is fixed to the end of the outlet pipe located inside the second shaft; the hollow tube and the motor output end are perpendicular to each other; the outer end of the hollow tube protrudes outside the second shaft.

[0011] Furthermore, the heating assembly includes cavities formed inside the two cam rotors; heating wires are fixedly installed inside the cavities; water injection holes are provided at the ends of the first shaft and the second shaft away from the motor, and the water injection holes communicate with the cavities.

[0012] Furthermore, the positive and negative poles of the heating wire extend to the end of the shaft away from the motor.

[0013] Furthermore, a sealing plug is inserted into the open end of the water injection hole, which is used to seal the water injection port.

[0014] Furthermore, the pump body is equipped with a partition that divides the internal space of the pump body into a gear cavity and a rotor cavity.

[0015] Furthermore, a first gear and a second gear are respectively fixed to the first shaft and the second shaft at positions corresponding to the gear cavity, and the first gear and the second gear mesh with each other.

[0016] The beneficial effects of this utility model are:

[0017] This invention employs two different methods to deliver water or gas into the cam rotor in low-temperature environments. High-temperature steam or hot water exchanges heat with the cam rotor, and then the heat is transferred to the adhesive layer on the outer protrusion of the cam rotor through heat transfer. This raises the temperature of the adhesive layer, thereby restoring its elasticity and flexibility, avoiding a series of problems such as embrittlement, cracking, and decreased adhesion. In this way, the medium isolation effect of the cam rotor is maintained, the service life is increased, and the maintenance cost is reduced. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0020] Figure 2 This is a cross-sectional view of the overall structure of Embodiment 1 of this utility model;

[0021] Figure 3 This is a schematic diagram of the cam rotor in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the spiral tube in Embodiment 1 of this utility model;

[0023] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0024] Figure 6 This is a cross-sectional view of the overall structure of Embodiment 2 of this utility model;

[0025] Figure 7 This is a schematic diagram of the cam rotor in Embodiment 2 of this utility model;

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Pump body; 2. End cap; 3. Feed pipe; 4. Discharge pipe; 5. Screw; 6. First shaft; 7. Second shaft; 8. First gear; 9. Cam rotor; 91. Rubber coating layer; 10. Air inlet pipe; 101. Air outlet pipe; 11. Motor; 12. Sealing plug; 13. Partition plate; 14. Second gear; 15. Cavity; 16. Heating wire; 17. Hollow tube; 18. Spiral tube; 19. Hollow disc; 20. Water injection hole. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1 As shown, an elastic cam rotor structure that completely isolates the medium includes a pump body 1, with a feed pipe 3 and a discharge pipe 4 symmetrically arranged on both sides of the pump body 1; end caps 2 are provided at both ends of the pump body 1, and the end caps 2 are threadedly connected to the pump body 1 by screws 5; a first shaft 6 and a second shaft 7 are rotatably connected inside the pump body 1, arranged vertically, and the first shaft 6 and the second shaft 7 are conjugately arranged and pass through both ends of the pump body 1; a motor 11 is provided at one end of the second shaft 7, and the output end of the motor 11 is fixedly connected to the shaft.

[0030] Please see Figure 2 and Figure 4 As shown, a partition 13 is provided inside the pump body 1, which divides the internal space of the pump body 1 into a gear cavity and a rotor cavity. The gear cavity is used to house the first gear 8 and the second gear 14, and the rotor cavity is used to house the cam rotor 9. The first shaft 6 and the second shaft 7 are respectively fixedly connected to the first gear 8 and the second gear 14 at the positions corresponding to the gear cavity, and the first gear 8 and the second gear 14 mesh with each other. The cam rotor 9 is respectively fixedly connected to the first shaft 6 and the second shaft 7 at the positions corresponding to the rotor cavity.

[0031] Three spiral tubes 18 are embedded inside the cam rotor 9. The three spiral tubes 18 are located on the outer protrusion of the cam rotor 9. The spiral tubes 18 are used to increase the flow path length of steam or hot water inside the cam rotor 9, thereby increasing the heat exchange time and reducing heat loss. Hollow discs 19 are fixed to both ends of the spiral tubes 18 and are connected to the three spiral tubes 18. The two hollow discs 19 are fixed to the opposite sides of each other and are connected to the inlet pipe 10 and the outlet pipe 101, with the outlet pipe 101 being closer to the motor 11. The inlet pipe 10 and the outlet pipe 101 are both located inside the shaft. The outlet pipe 101 located inside the second shaft 7 is fixed to the end of a hollow tube 17, and the hollow tube 17 is perpendicular to the output end of the motor 11. The outer end of the hollow tube 17 protrudes outside the second shaft 7.

[0032] Please see Figure 3 As shown, the three outward protrusions of the cam rotor 9 are also provided with an adhesive layer 91, which is used to isolate the medium and reduce rigid contact.

[0033] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below:

[0034] Because the cam rotor 9 pump is used in low-temperature environments, the adhesive layer 91 on the cam rotor 9 may harden, become brittle, crack, peel off, and experience a decrease in adhesion between the adhesive layer and the rotor substrate. This can lead to fluid leakage, reduced pump efficiency, and even increased wear on the rotor and pump body 1, affecting the long-term reliability and safety of the equipment. Before use, the operator introduces high-temperature steam or hot water into the air inlet pipe 10. The high-temperature steam or hot water then flows sequentially through the hollow disc 19, spiral pipe 18, hollow disc 19, air outlet pipe 101, and hollow pipe 17. During this process, the high-temperature steam or hot water continuously exchanges heat with the cam rotor 9, and then transfers the heat to the adhesive layer 91 on the outer protrusion of the cam rotor 9 through heat transfer. This raises the temperature of the adhesive layer 91, restoring its elasticity and flexibility, preventing a series of problems such as embrittlement, cracking, and decreased adhesion. This maintains the media isolation effect of the cam rotor 9, increases its service life, and reduces maintenance costs.

[0035] Example 2:

[0036] This utility model is an elastic cam rotor structure that completely isolates the medium. This embodiment is basically the same as the first embodiment in structure, except that:

[0037] like Figures 5-7 As shown, each of the two cam rotors 9 has a cavity 15 inside; a heating wire 16 is fixedly installed inside the cavity 15, and the positive and negative poles of the heating wire 16 extend to the end of the shaft away from the motor 11. The heating wire 16 is used to heat water; a water injection hole 20 is opened at the end of the first shaft 6 and the second shaft 7 away from the motor 11. The water injection hole 20 is connected to the cavity 15 and is used to inject water into the cam rotor 9; a sealing plug 12 is inserted into the opening end of the water injection hole 20. The sealing plug 12 is used to block the water injection port and prevent water from flowing back into the cam rotor 9.

[0038] Before using the cam rotor 9 pump, the operator first injects water into the water injection hole 20. Since the cam rotor 9 has a cavity 15 inside, and the cavity 15 is connected to the water injection hole 20, water can be injected into the cavity 15 from the water injection hole 20. At this time, the operator then turns on the heating wire 16 inside the cavity 15. The heating wire 16 works to heat the injected water. The heated water exchanges heat with the cam rotor 9, and then the heat is transferred to the adhesive layer 91 on the outer protrusion of the cam rotor 9 through heat transfer, which raises the temperature of the adhesive layer 91, thereby restoring its elasticity and flexibility and promoting the normal operation of the cam rotor 9 pump.

[0039] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A completely media-isolated elastomeric cam rotor structure, comprising a pump body (1); a feed pipe (3) and a discharge pipe (4) symmetrically arranged on both sides of the pump body (1); and end caps (2) provided at both ends of the pump body (1); characterized in that: The pump body (1) is rotatably connected to a first shaft (6) and a second shaft (7); the pump body (1) is rotatably connected to a first shaft (6) and a second shaft (7) arranged vertically; a cam rotor (9) is fixedly connected to the first shaft (6) and the second shaft (7); the three protruding parts of the cam rotor (9) are also provided with an adhesive layer (91); a heating component is provided inside the cam rotor (9).

2. The elastic cam rotor structure with complete media isolation according to claim 1, characterized in that: The heating assembly includes three spiral tubes (18) embedded inside the cam rotor (9); and the three spiral tubes (18) are respectively located on the outer protrusion of the cam rotor (9); the two ends of the spiral tubes (18) are respectively fixedly connected to a hollow disk (19); the two hollow disks (19) are respectively fixedly connected to a connecting air inlet pipe (10) and an air outlet pipe (101) on the side away from each other, and the air outlet pipe (101) is closer to the motor (11).

3. The elastic cam rotor structure with complete media isolation according to claim 2, characterized in that: The first shaft (6) and the second shaft (7) extend through to both ends of the pump body (1); the air inlet pipe (10) and the air outlet pipe (101) are both located inside the shaft; the end of the air outlet pipe (101) located inside the second shaft (7) is fixedly connected to a hollow tube (17); the hollow tube (17) and the output end of the motor (11) are perpendicular to each other; the outer end of the hollow tube (17) protrudes outside the second shaft (7).

4. The elastic cam rotor structure with complete media isolation according to claim 1, characterized in that: The heating assembly includes a cavity (15) opened inside the two cam rotors (9); a heating wire (16) is fixedly installed inside the cavity (15); a water injection hole (20) is opened at the end of the first shaft (6) and the second shaft (7) away from the motor (11), and the water injection hole (20) is connected to the cavity (15).

5. The elastic cam rotor structure with complete media isolation according to claim 4, characterized in that: The positive and negative poles of the heating wire (16) extend to the end of the shaft away from the motor (11).

6. The elastic cam rotor structure with complete media isolation according to claim 4, characterized in that: A sealing plug (12) is inserted into the open end of the water injection hole (20).

7. The elastic cam rotor structure with complete media isolation according to claim 1, characterized in that: The pump body (1) is provided with a partition (13) inside, which divides the internal space of the pump body (1) into a gear cavity and a rotor cavity.

8. The elastic cam rotor structure with complete media isolation according to claim 1, characterized in that: The first shaft (6) and the second shaft (7) are respectively fixed to the first gear (8) and the second gear (14) at the positions corresponding to the gear cavity, and the first gear (8) and the second gear (14) mesh with each other.

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