High-efficiency cam rotor pump with gradually-changed gap design

Abstract

The utility model discloses a high-efficiency cam rotor pump with a gradually-changed gap design, and belongs to the technical field of cam rotor pumps. The high-efficiency cam rotor pump with the gradually-changed gap design comprises a shell, a pair of rotors are rotationally arranged in the shell, the high-efficiency cam rotor pump further comprises linings of an arc-shaped structure, clamping grooves are formed in the inner top and the inner bottom of the shell, the linings are arranged in the clamping grooves in a sliding mode respectively, the rotors abut against the inner walls of the corresponding linings respectively, and the pair of rotors abut against the inner walls of the linings respectively. An end cover is detachably arranged on one side of the shell; the clamping groove is formed in the inner wall of the shell, the lining is arranged in the clamping groove in a sliding mode, the rotor can abut against the inner wall of the lining in the rotating process of the rotor, the rotor and the inner wall of the shell are separated, mechanical abrasion of media for conveying particulate matter to the inner wall of the shell is reduced, replacement is convenient after the lining is abraded subsequently, and the service life of the rotor is prolonged. The use cost can be reduced, and the use effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of cam rotor pump technology, and in particular to a high-efficiency cam rotor pump with a gradual clearance design. Background Technology

[0002] Cam rotor pumps are among the most advanced fluid equipment in the world. Their rotors are fully rubber-coated, making them highly wear-resistant. The high-precision clearance fit between the rotor and the casing provides strong self-priming force and high lift. They can transport various viscous media or media containing particles and are suitable for various complex fluid media. The working principle of cam rotor pumps mainly relies on the suction force generated at the inlet by two synchronously counter-rotating rotors during rotation, thereby drawing in the material to be transported.

[0003] In existing lobe rotor pumps, the rotor rotates continuously relative to the inner wall of the casing. During long-term use, the presence of particulate matter in the conveyed medium increases the wear on the inner wall of the casing. Furthermore, since the casing is a single piece, subsequent replacement costs are high, affecting the performance. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that the rotor will experience mechanical wear on the inner wall of the casing during long-term operation, resulting in high subsequent maintenance and replacement costs. This invention proposes a high-efficiency cam rotor pump with a gradual clearance design.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency cam rotor pump with a gradually increasing clearance design includes a housing, a pair of rotors rotatably disposed within the housing, and an arc-shaped bushing. The top and bottom of the housing are provided with slots, and the bushings are slidably disposed within the slots. The pair of rotors abut against the inner walls of their respective bushings. An end cap is detachably disposed on one side of the housing.

[0007] To increase the protection range of the inner wall of the housing, preferably, the bushing arc is larger than a semicircle.

[0008] To make the bushing corrosion resistant, the bushing is preferably made of ceramic.

[0009] To facilitate fixing the end cap to the housing, preferably, multiple sets of rotating plates are fixedly installed on the housing, a fixed shaft is rotatably installed on the rotating plate, a screw is fixedly installed on the fixed shaft, and multiple sets of fixing ears corresponding to the rotating plates are fixedly installed on the end cap. The fixing ears are provided with through grooves, and a hand-tightening nut is threaded to one end of the screw extending out of the through groove.

[0010] Furthermore, at least two positioning holes are provided on one side of the housing, and blind holes corresponding to the positioning holes are provided on the end cap. The positioning holes and blind holes are connected by positioning pins.

[0011] Preferably, a sealing gasket is provided between the housing and the end cap.

[0012] Compared with the prior art, this utility model provides a high-efficiency cam rotor pump with a gradual clearance design, which has the following beneficial effects:

[0013] 1. This high-efficiency cam rotor pump with a gradual clearance design has a groove on the inner wall of the housing, in which a bushing is slidably installed. During the rotation of the rotor, the bushing can abut against the inner wall of the housing, thus separating the rotor from the inner wall of the housing. This reduces the mechanical wear caused by the medium conveying particulate matter to the inner wall of the housing. After the bushing wears out, it is easier to replace, which can reduce the cost of use and improve the performance.

[0014] 2. This high-efficiency cam rotor pump with a gradual clearance design has a rotating plate fixed on the housing, a screw rotating around a fixed shaft on the rotating plate, and a fixing lug fixed on the end cover. By tightening the hand-tightening nut, the end cover can be fixed to the housing, which is convenient to install and remove, reliable to fix, and can prevent the screw from being lost, thus improving maintenance efficiency.

[0015] 3. This high-efficiency cam rotor pump with a gradual clearance design has a positioning hole on the housing and a blind hole on the end cover. The two ends of the positioning pin are slidably set in the positioning hole and the blind hole respectively, which can achieve a precise connection between the end cover and the housing and improve the performance.

[0016] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model provides a slot on the inner wall of the housing, in which a bushing is slidably disposed. During the rotation of the rotor, the bushing can abut against the inner wall of the housing, thereby separating the rotor from the inner wall of the housing, reducing the mechanical wear caused by the medium conveying particulate matter to the inner wall of the housing. After the bushing wears out, it is easier to replace, which can reduce the cost of use and improve the performance. Attached Figure Description

[0017] Figure 1 Schematic diagram of a high-efficiency cam rotor pump with a gradually changing clearance design proposed in this utility model Figure 1 ;

[0018] Figure 2 Schematic diagram of a high-efficiency cam rotor pump with a gradually changing clearance design proposed in this utility model Figure 2 ;

[0019] Figure 3Schematic diagram of a high-efficiency cam rotor pump with a gradually changing clearance design proposed in this utility model Figure 3 ;

[0020] Figure 4 This is a schematic diagram of the structure of a high-efficiency cam rotor pump rotating plate with a gradually changing gap design proposed in this utility model.

[0021] In the diagram: 1. Housing; 101. Slot; 102. Positioning hole; 2. End cap; 201. Fixing ear; 202. Through groove; 3. Bushing; 4. Sealing gasket; 5. Rotating plate; 501. Fixing shaft; 502. Screw; 503. Hand-tightening nut. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example:

[0025] Reference Figures 1-4 A high-efficiency cam rotor pump with a gradually increasing gap design includes a housing 1, a pair of rotors rotatably mounted inside the housing 1, an inlet pipe and an outlet pipe fixedly mounted on the housing 1, allowing the medium to enter the housing 1 through the inlet pipe and flow out through the outlet pipe during rotor rotation, and also includes an arc-shaped bushing 3, the arc of which is greater than a semicircle, preferably two-thirds of a circle, to maximize the shielding of the contact area between the inner wall of the housing 1 and the rotors. Furthermore, slots 101 are provided at the top and bottom of the housing 1, allowing the bushing 3 to be slidably mounted in the slots 101 respectively. Inside, the outer wall of the bushing 3 abuts against the sealing gasket 4, thus confining the bushing 3 within the housing 1. A pair of rotors abut against the inner walls of their respective bushings 3. An end cap 2 is detachably installed on one side of the housing 1. During use, a slot 101 is provided on the inner wall of the housing 1, within which the bushing 3 slides. During rotor rotation, it abuts against the inner wall of the bushing 3, thus separating the rotor from the inner wall of the housing 1. This reduces mechanical wear caused by the medium transporting particulate matter on the inner wall of the housing 1. Subsequent wear of the bushing 3 makes replacement easier, reducing operating costs and improving performance.

[0026] Reference Figure 2 and Figure 3 The bushing 3 is made of ceramic, bronze, or brass. Here, we prefer ceramic because it has excellent chemical stability, strong corrosion resistance, and strong wear resistance, making it suitable for medium and high speed applications.

[0027] Reference Figure 1 , Figure 2 and Figure 4 Multiple sets of rotating plates 5 are fixedly installed on the housing 1. There are two to eight sets of rotating plates 5, but three sets are preferred. A fixed shaft 501 is rotatably mounted on each of the three sets of rotating plates 5. A screw 502 is fixedly mounted on the fixed shaft 501, with the axis of the screw 502 perpendicular to the extended axis of the fixed shaft 501. Multiple sets of fixing ears 201 corresponding to the rotating plates 5 are fixedly installed on the end cover 2. A through groove 202 is formed in each fixing ear 201, and a thread extends from one end of the screw 502 beyond the through groove 202. A hand-tightening nut 503 is connected, and the end face of the hand-tightening nut 503 near the housing 1 abuts against the outer wall of the end cover 2, thereby fixing the end cover 2 to the housing 1. In use, a rotating plate 5 is fixedly set on the housing 1, and a screw 502 that rotates around a fixed shaft 501 is set on the rotating plate 5. A fixing lug 201 is fixedly set on the end cover 2. By tightening the hand-tightening nut 503, the end cover 2 can be fixed to the housing 1. It is easy to install and remove, the fixation is reliable, and it can prevent the screw 502 from being lost, thereby improving maintenance efficiency.

[0028] Reference Figure 2 and Figure 3 At least two positioning holes 102 are provided on one side of the housing 1. Here, we prefer two holes. A blind hole corresponding to the positioning hole 102 is provided on the end cover 2. The positioning hole 102 and the blind hole are connected by a positioning pin. In use, by providing the positioning hole 102 on the housing 1 and the blind hole on the end cover 2, and by sliding the two ends of the positioning pin in the positioning hole 102 and the blind hole respectively, a precise connection between the end cover 2 and the housing 1 can be achieved, improving the performance.

[0029] Reference Figures 1-3 A sealing gasket 4 is provided between the housing 1 and the end cover 2. When the end cover 2 is fixed to the housing 1, the sealing gasket 4 is sandwiched between the housing 1 and the end cover 2, thereby fixing the sealing gasket 4. In use, by providing the sealing gasket 4 between the housing 1 and the end cover 2, the sealing effect between the end cover 2 and the housing 1 can be improved, and leakage can be reduced.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency cam rotor pump with a gradually varying clearance design, comprising a housing (1), wherein a pair of rotors are rotatably disposed within the housing (1), characterized in that, It also includes a bushing (3) with an arc-shaped structure. The top and bottom of the housing (1) are provided with slots (101). The bushings (3) are slidably disposed in the slots (101), and a pair of rotors abut against the inner wall of the corresponding bushings (3). An end cap (2) is detachably disposed on one side of the housing (1).

2. The high-efficiency cam rotor pump with a gradually changing clearance design according to claim 1, characterized in that, The bushing (3) has an arc shape greater than a semicircle.

3. The high-efficiency cam rotor pump with a gradually changing clearance design according to claim 1, characterized in that, The bushing (3) is made of ceramic.

4. The high-efficiency cam rotor pump with a gradually changing clearance design according to claim 1, characterized in that, Multiple sets of rotating plates (5) are fixedly installed on the housing (1). A fixed shaft (501) is rotatably installed on the rotating plate (5). A screw (502) is fixedly installed on the fixed shaft (501). Multiple sets of fixed ears (201) corresponding to the rotating plate (5) are fixedly installed on the end cover (2). A through groove (202) is opened on the fixed ear (201), and a hand-tightening nut (503) is threaded to one end of the screw (502) extending out of the through groove (202).

5. A high-efficiency cam rotor pump with a gradually changing clearance design according to claim 4, characterized in that, The housing (1) has at least two positioning holes (102) on one side, and the end cap (2) has a blind hole corresponding to the positioning hole (102). The positioning hole (102) and the blind hole are connected by a positioning pin.

6. A high-efficiency cam rotor pump with a gradually changing clearance design according to claim 1, characterized in that, A sealing gasket (4) is provided between the housing (1) and the end cap (2).

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