Rotor pump with circumferential piston rotor balanced in stress

Abstract

The utility model discloses a rotor pump with circumferential piston rotors balanced in stress, the two circumferential piston rotors rotating in a matched mode are arranged in a pump cavity, each circumferential piston rotor comprises a rotor sleeve, the rotor sleeves are fixedly connected with a rotating shaft in a sleeving mode, and two rotor wings are symmetrically and fixedly arranged at the center positions of the outer sides of the rotor sleeves; a cylindrical boss is fixedly arranged in the pump cavity, the boss is connected to the outer side of the rotor sleeve in a sleeving mode, a concave surface is arranged at the contact position of the outer side of the boss and the rotor wing at the corresponding position, and the concave surface is in clearance contact with the rotor wing surface; the rotor wings are symmetrically and fixedly arranged in the center of the outer side of the rotor sleeve, connection between the rotor sleeve and the rotor wings is more stable, stress is balanced, and the rotor pump operates more efficiently. The boss comprises a first boss body and a second boss body which are concentrically and oppositely arranged, the first boss body and the second boss body are fixedly arranged in the pump cavity and the pump cover respectively, the first boss body and the second boss body are connected with the rotor sleeve in a sleeved mode in two directions, the operation stability of the rotor pump is improved, and the rotor pump is more convenient to machine and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor pumps, in particular to a rotor pump with a circumferential piston rotor having balanced force. Background Art

[0002] A rotor pump refers to a pump that changes the working volume through the relative movement between the rotor and the pump body, thereby increasing the energy of the liquid. A rotor pump is a rotary positive displacement pump with a positive displacement property, and its flow rate does not change with the back pressure.

[0003] The rotors of rotor pumps usually have forms such as cam rotors, double-wing rotors, and circumferential piston rotors.

[0004] Among them, the gap contacts between the cam rotor and the double-wing rotor are all line contacts, and the effect of preventing liquid backflow is relatively poor. Moreover, once the rotor is worn, the gap will become very large, and the efficiency will be greatly reduced.

[0005] The circumferential piston rotor is a special double-wing rotor that improves the problem that the gap contact between the double-wing rotors is very narrow (a line). This makes the gap contacts between the circumferential piston rotor, the pump cover, the pump cavity, and the rotor all contact surfaces instead of contact lines, and the operation effect is very good. The circumferential piston rotor converts the contact between the rotors into the contact between the rotor and the convex platform of the pump cavity, making the contact line become a contact surface.

[0006] The circumferential piston rotor improves the gap contact, but this brings a problem, that is, the two wings of the rotor become cantilevers, resulting in: 1. Stress concentration at the root of the cantilever; 2. Under high pressure, the deflection is relatively large, and as the deflection increases, it is easy to scrape with the pump cavity. 3. The contact part between the two wings and the wing handle is relatively narrow, and the stability is poor. Summary of the Utility Model

[0007] Aiming at the problems in the related art, the present application discloses a rotor pump with a circumferential piston rotor having balanced force, which solves the problem of the cantilever connection of the two wings of the rotor in the related art.

[0008] To achieve the above object, the present application provides the following technical solutions:

[0009] A rotor pump with a circumferential piston rotor having balanced force, comprising a pump body, the pump body includes a pump chamber, one side of the pump chamber is provided with a pump cover, the pump cover is detachably and sealingly connected to the pump chamber to form a sealed working cavity, two circumferential piston rotors that cooperate with each other in rotation are arranged in the pump chamber, the circumferential piston rotor includes a rotor sleeve, the rotor sleeve is fixedly sleeved on the rotating shaft, two rotor wings are symmetrically and fixedly arranged at the central position on the outer side of the rotor sleeve, a cylindrical boss is fixedly arranged in the pump chamber, the boss is sleeved on the outer side of the rotor sleeve, a concave surface is arranged at the contact position between the outer side of the boss and the corresponding rotor wing, and the concave surface is in clearance contact with the rotor wing surface.

[0010] As a further solution of the present application: the boss includes a first boss and a second boss, the first boss and the second boss are respectively fixedly arranged in the pump chamber and the pump cover, the first boss and the second boss are arranged concentrically and oppositely, and the first boss and the second boss are sleeved on the rotor sleeve in two directions.

[0011] As a further solution of the present application: a collar is fixedly arranged at the central position on the outer side of the rotor sleeve, the collar is circular, wing handles are symmetrically and fixedly arranged at both ends of the collar, and the rotor wings are fixedly arranged on the outer sides of the wing handles.

[0012] As a further solution of the present application: the collar is in line contact with the corresponding rotor wing.

[0013] As a further solution of the present application: the width of the rotor wing is greater than the width of the wing handle, the width of the wing handle is equal to the width of the collar, and the outer side of the boss is in contact connection with the inner side surface of the rotor wing.

[0014] As a further solution of the present application: the inside of the rotor sleeve and the rotating shaft are connected by a key, and the rotating shaft and the outer side of the rotor sleeve are fixedly connected by a rotor nut.

[0015] In summary, the beneficial effects of the present application are:

[0016] 1. The rotor wings are symmetrically and fixedly arranged at the central position on the outer side of the rotor sleeve, the connection between the rotor sleeve and the rotor wings is more stable, the force is balanced, and the rotor pump runs more efficiently.

[0017] 2. The boss includes a first boss and a second boss that are arranged concentrically and oppositely, the first boss and the second boss are respectively fixedly arranged in the pump chamber and the pump cover, and the first boss and the second boss are sleeved on the rotor sleeve in two directions, improving the running stability of the rotor pump and making processing and assembly more convenient. Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification. They are used together with the embodiments of the present application to explain the present application, and do not constitute a limitation to the present application.

[0019] In the accompanying drawings:

[0020] Figure 1 This is a schematic structural diagram of a rotor pump with a circumferential piston rotor having balanced force.

[0021] Figure 2 This is a schematic structural diagram of the interior of the pump chamber of a rotor pump with a circumferential piston rotor having balanced force.

[0022] Figure 3 This is a schematic structural diagram of the circumferential piston rotor of a rotor pump with a circumferential piston rotor having balanced force.

[0023] Annotation of reference numerals in the drawings:

[0024] 1. Pump main body; 2. Pump chamber; 3. Pump cover; 41. Rotor sleeve; 42. Collar; 43. Wing handle; 44. Rotor wing; 51. Concave surface; 52. First convex part; 53. Second convex part; 6. Rotating shaft; 7. Key; 8. Rotor nut; Detailed implementation manners

[0025] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure detailed in the appended claims.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0027] In addition, the descriptions such as "first" and "second" in the embodiments are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present application. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0028] To further understand the content, features and effects of the present application, the following embodiments are exemplified and described in detail with reference to the accompanying drawings as follows:

[0029] As Figures 1 - 3 shown:

[0030] A rotor pump with a circumferential piston rotor having balanced force includes a pump body 1. The pump body 1 includes a pump chamber 2. A pump cover 3 is provided on one side of the pump chamber 2. The pump cover 3 is detachably and sealingly connected to the pump chamber 2 to form a sealed working cavity.

[0031] Two circumferential piston rotors that cooperate with each other to rotate are provided in the pump chamber 2. The circumferential piston rotor includes a rotor sleeve 41. The rotor sleeve 41 is fixedly sleeved with a rotating shaft 6. The rotating shaft 6 rotates under the action of power and drives the two circumferential piston rotors to rotate through the transmission of force.

[0032] Wherein, two rotor wings 44 are symmetrically and fixedly provided at the center position on the outer side of the rotor sleeve 41. A cylindrical boss is fixedly provided in the pump chamber 2. The boss is sleeved on the outer side of the rotor sleeve 41. A concave surface 51 is provided at the contact position between the outer side of the boss and the corresponding rotor wing 44. The concave surface 51 is in clearance contact with the surface of the rotor wing 44.

[0033] The concave shape of the concave surface 51 conforms to the outer shape of the rotor wing 44 and is arc-shaped.

[0034] Preferably, the boss includes a first boss 52 and a second boss 53. The first boss 52 and the second boss 53 are respectively fixedly provided in the pump chamber 2 and the pump cover 3. The first boss 52 and the second boss 53 are arranged concentrically and oppositely. The first boss 52 and the second boss 53 are sleeved with the rotor sleeve 41 in two directions.

[0035] Preferably, a collar 42 is fixedly provided at the center position on the outer side of the rotor sleeve 41. The collar 42 is circular. Wing handles 43 are symmetrically and fixedly provided at both ends of the collar 42. Rotor wings 44 are fixedly provided on the outer sides of the wing handles 43.

[0036] The collar 42 is in line contact with the corresponding rotor wing 44.

[0037] The first boss 52 and the second boss 53 are respectively abutted against the collar 42.

[0038] In addition, the width of the rotor wing 44 is greater than the width of the wing handle 43. The width of the wing handle 43 is equal to the width of the collar 42. The outer side of the boss is in contact connection with the inner side surface of the rotor wing 44.

[0039] The inside of the rotor sleeve 41 and the rotating shaft 6 are connected by a key 7. The rotating shaft 6 and the outer side of the rotor sleeve 41 are fixedly connected by a rotor nut 8, improving the operation stability of the rotor pump.

[0040] In practical applications:

[0041] The rotor blade 44 is symmetrically and fixedly arranged at the outer center position of the rotor sleeve 41. The connection between the rotor sleeve 41 and the rotor blade 44 is more stable, the force is balanced, and the rotor pump operates more efficiently.

[0042] The boss includes a first boss 52 and a second boss 53 which are arranged concentrically and oppositely. The first boss 52 and the second boss 53 are respectively fixedly arranged on the pump chamber 2 and the pump cover 3. The first boss 52 and the second boss 53 are sleeved with the rotor sleeve 41 in two directions, improving the stability of the operation of the rotor pump and making processing and assembly more convenient.

[0043] Finally, it should be noted that the above disclosure is only the preferred embodiment of the present application and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application. The scope of the present application is only limited by the appended claims.

Claims

1. A rotor pump with a circumferential piston rotor having balanced force, comprising a pump main body (1), the pump main body (1) includes a pump chamber (2), a pump cover (3) is provided on one side of the pump chamber (2), and the pump cover (3) is detachably and sealingly connected to the pump chamber (2) to form a sealed working cavity, characterized in that: There are two circumferential piston rotors that rotate in cooperation with each other in the pump chamber (2). The circumferential piston rotor includes a rotor sleeve (41), the rotor sleeve (41) is fixedly sleeved with the rotating shaft (6), two rotor wings (44) are symmetrically and fixedly arranged at the central position on the outer side of the rotor sleeve (41), a cylindrical boss is fixedly arranged in the pump chamber (2), the boss is sleeved on the outer side of the rotor sleeve (41), and a concave surface (51) is arranged at the contact position between the outer side of the boss and the rotor wing (44) at the corresponding position, and the concave surface (51) is in clearance contact with the surface of the rotor wing (44).

2. The rotor pump with a circumferential piston rotor having balanced force according to claim 1, wherein: The boss includes a first boss (52) and a second boss (53). The first boss (52) and the second boss (53) are respectively fixedly arranged in the pump chamber (2) and the pump cover (3). The first boss (52) and the second boss (53) are arranged concentrically and oppositely, and the first boss (52) and the second boss (53) are sleeved with the rotor sleeve (41) in two directions.

3. The rotor pump with a circumferential piston rotor having balanced force according to claim 1, characterized in that: A collar (42) is fixedly arranged at the central position on the outer side of the rotor sleeve (41). The collar (42) is circular, and wing handles (43) are symmetrically and fixedly arranged at both ends of the collar (42), and the rotor wings (44) are fixedly arranged on the outer sides of the wing handles (43).

4. The rotor pump with a circumferential piston rotor having balanced force according to claim 3, characterized in that: The collar (42) is in line contact with the rotor wing (44) at the corresponding position.

5. The rotor pump with a circumferential piston rotor having balanced force according to claim 3, wherein: The width of the rotor wing (44) is greater than the width of the wing handle (43), the width of the wing handle (43) is equal to the width of the collar (42), and the outer side of the boss is in contact connection with the inner side surface of the rotor wing (44).

6. The rotor pump with a circumferential piston rotor having balanced force according to claim 1, characterized in that: The inside of the rotor sleeve (41) is connected with the rotating shaft (6) through a key (7), and the rotating shaft (6) and the outer side of the rotor sleeve (41) are fixedly connected through a rotor nut (8).

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