Self-priming gear pump

Abstract

The utility model relates to the technical field of gear pumps, and particularly discloses a self-priming gear pump which comprises a pump shell, two rotors are rotatably arranged in the pump shell and meshed with each other, one rotor is in key connection with the outer wall of a driven shaft, the other rotor is in key connection with the outer wall of a driving shaft, a driving gear is arranged on the outer wall of the driving shaft, and the driving gear is meshed with the driven shaft. A driven gear is arranged on the outer wall of the driven shaft, and the driving gear is meshed with the driven gear; a rotor cavity is formed in the pump shell, the rotor is arranged in the rotor cavity, the left side of the middle of the rotor cavity communicates with a left inlet-outlet cavity, the right side of the middle of the rotor cavity communicates with a right inlet-outlet cavity, and the left inlet-outlet cavity and the right inlet-outlet cavity are each provided with two openings. Through the arrangement of the two openings in the left inlet and outlet cavity and the two openings in the right inlet and outlet cavity, cleaning can be conducted through the four openings when the self-priming gear pump is blocked, the self-priming gear pump does not need to be overall disassembled, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, and specifically discloses a self-priming gear pump. Background Art

[0002] A self-priming gear pump is a gear pump with self-priming ability. Through specific design and working principle, it can suck liquid from a lower position and start normal operation without external guiding liquid.

[0003] The working principle of the self-priming gear pump is mainly based on the rotational movement of the gears. When the gears rotate in the pump housing, the teeth of the gears gradually separate, increasing the volume of the suction chamber and reducing the pressure, thus generating negative pressure. This negative pressure causes the liquid to be sucked into the pump, and as the gears continue to rotate, the liquid is carried into the meshing area of the gears. In the meshing area, the liquid is squeezed and pushed to the outlet, thereby realizing continuous transportation of the liquid.

[0004] In the existing self-priming gear pump, the meshing gears are prone to material jamming, which may cause blockage. Moreover, for the existing self-priming gear pump, both the inlet and outlet of the pump housing are on the top surface or both on the side walls. If blockage occurs, the entire self-priming gear pump needs to be disassembled, and the operation is cumbersome. Content of the Utility Model

[0005] According to the above deficiencies in the prior art, the utility model provides a self-priming gear pump, which reduces the probability of blockage caused by material jamming of the meshing gears. When blockage occurs, it can be cleaned from four openings, and the operation is simple.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0007] The self-priming gear pump described in the utility model includes a pump housing. Two rotors are rotatably arranged in the pump housing, and the two rotors mesh with each other. One of the rotors is key-connected to the outer wall of the driven shaft, and the other rotor is key-connected to the outer wall of the driving shaft. A driving gear is arranged on the outer wall of the driving shaft, and a driven gear is arranged on the outer wall of the driven shaft. The driving gear meshes with the driven gear. A rotor cavity is arranged in the pump housing, and the rotors are arranged in the rotor cavity. The left and right sides of the middle part of the rotor cavity are respectively communicated with a left inlet and outlet cavity and a right inlet and outlet cavity. Two openings are arranged on both the left inlet and outlet cavity and the right inlet and outlet cavity.

[0008] The rotor is integrally cylindrical, and three spiral grooves are arranged at intervals on the outer wall of the rotor. Transition fillets are arranged at the edges of the spiral grooves.

[0009] The two openings on the left inlet and outlet cavity are respectively arranged on the top surface and the side surface of the left inlet and outlet cavity, and the two openings on the right inlet and outlet cavity are respectively arranged on the top surface and the side surface of the right inlet and outlet cavity.

[0010] The connection between the rotor cavity and the left inlet and outlet cavity is arranged in cooperation with the opening on the side of the left inlet and outlet cavity, and the connection between the rotor cavity and the right inlet and outlet cavity is arranged in cooperation with the opening on the side of the right inlet and outlet cavity.

[0011] The driven shaft is arranged above the driving shaft. One side of the pump housing is provided with a gearbox through bolts. After passing through the pump housing, the driven shaft is rotatably arranged on the gearbox through bearings. After passing through the pump housing, the driving shaft is rotatably arranged on the gearbox through bearings, and the driving shaft passes through the gearbox.

[0012] Both the driving gear and the driven gear are arranged inside the gearbox.

[0013] On the front and rear inner walls of the gearbox, a first circular truncated cone is arranged in cooperation with the bearing of the driven shaft.

[0014] On the front and rear inner walls of the gearbox, a second circular truncated cone is arranged in cooperation with the bearing of the driving shaft.

[0015] A cover plate is arranged at the top of the gearbox.

[0016] An end cover is arranged on the side of the pump housing away from the gearbox.

[0017] The beneficial effects of the present utility model are as follows:

[0018] Through the arrangement of two openings on the left inlet and outlet cavity and two openings on the right inlet and outlet cavity of the present utility model, it can be cleaned from four openings when blocked, without the need to disassemble the self-priming gear pump as a whole, and the operation is simple. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a partial structural cross-sectional view of the present utility model;

[0021] Figure 3 is a schematic sectional structure diagram of the present utility model Figure 1 ;

[0022] Figure 4 is a schematic sectional structure diagram of the present utility model Figure 2 ;

[0023] Figure 5 is a schematic structural diagram of the rotor of the present utility model;

[0024] In the figure: 1. Pump housing; 2. Rotor; 3. Driven shaft; 4. Driving shaft; 5. Gearbox; 6. Driving gear; 7. Driven gear; 8. First circular truncated cone; 9. Second circular truncated cone; 10. Cover plate; 11. End cover; 101. Rotor cavity; 102. Left inlet and outlet cavity; 103. Right inlet and outlet cavity. Detailed Implementation Modes

[0025] The present utility model will be specifically described and illustrated below in conjunction with the accompanying drawings.

[0026] Embodiment 1

[0027] As Figures 1-5 shown, the present utility model includes a pump housing 1, in which two rotors 2 are rotatably arranged. The two rotors 2 mesh with each other. One of the rotors 2 is key-connected to the outer wall of the driven shaft 3, and the other rotor 2 is key-connected to the outer wall of the driving shaft 4. An active gear 6 is arranged on the outer wall of the driving shaft 4, and a driven gear 7 is arranged on the outer wall of the driven shaft 3. The active gear 6 meshes with the driven gear 7. A rotor cavity 101 is arranged in the pump housing 1, and the rotor 2 is arranged in the rotor cavity 101. The left and right sides of the middle part of the rotor cavity 101 are respectively communicated with a left inlet and outlet cavity 102 and a right inlet and outlet cavity 103. Two openings are arranged on both the left inlet and outlet cavity 102 and the right inlet and outlet cavity 103.

[0028] During use, according to needs, a liquid inlet and a liquid outlet are selected and arranged among the two openings on the left inlet and outlet cavity 102 and the two openings on the right inlet and outlet cavity 103. Through the arrangement of the two openings on the left inlet and outlet cavity 102 and the two openings on the right inlet and outlet cavity 103, cleaning can be carried out from the four openings when blocked, without the need to disassemble the self-priming gear pump as a whole, and the operation is simple.

[0029] The rotor 2 is integrally arranged in a cylindrical shape, and three spiral grooves are arranged at intervals on the outer wall of the rotor 2. Transition rounded corners are arranged at the edges of the spiral grooves. The reasonable arrangement of the spiral grooves on the rotor 2 reduces the probability of material jamming and blockage.

[0030] The two openings on the left inlet and outlet cavity 102 are respectively arranged on the top surface and the side surface of the left inlet and outlet cavity 102, and the two openings on the right inlet and outlet cavity 103 are respectively arranged on the top surface and the side surface of the right inlet and outlet cavity 103; it is convenient for the setting of external pipelines and reduces the head loss.

[0031] The connection part between the rotor cavity 101 and the left inlet and outlet cavity 102 is arranged in cooperation with the opening on the side surface of the left inlet and outlet cavity 102, and the connection part between the rotor cavity 101 and the right inlet and outlet cavity 103 is arranged in cooperation with the opening on the side surface of the right inlet and outlet cavity 103; to ensure the smooth flow of water inlet and outlet and reduce the head loss.

[0032] The driven shaft 3 is arranged above the driving shaft 4. One side of the pump housing 1 is provided with a gear box 5 through bolts. The driven shaft 3 passes through the pump housing 1 and is rotatably arranged on the gear box 5 through bearings. The driving shaft 4 passes through the pump housing 1 and is rotatably arranged on the gear box 5 through bearings, and the driving shaft 4 passes through the gear box 5.

[0033] Both the active gear 6 and the driven gear 7 are arranged in the gear box 5.

[0034] On the front and rear inner walls of the gearbox 5, a first annular platform 8 is provided for the bearing that mates with the driven shaft 3; the provision of the first annular platform 8 ensures the stability of the setting of the driven shaft 3.

[0035] On the front and rear inner walls of the gearbox 5, a second annular platform 9 is provided for the bearing that mates with the driving shaft 4; the provision of the second annular platform 9 ensures the stability of the setting of the driving shaft 4.

[0036] A cover plate 10 is provided at the top of the gearbox 5.

[0037] An end cover 11 is provided on one side of the pump casing 1 away from the gearbox 5; in case of blockage, the end cover 11 can also be removed for cleaning to avoid the removal of the rotor 2.

Claims

1. A self-priming gear pump, comprising a pump housing (1), wherein two rotors (2) are rotatably arranged in the pump housing (1), characterized in that: The two rotors (2) mesh with each other, one of the rotors (2) is key-connected to the outer wall of the driven shaft (3), and the other rotor (2) is key-connected to the outer wall of the driving shaft (4); a driving gear (6) is provided on the outer wall of the driving shaft (4), and a driven gear (7) is provided on the outer wall of the driven shaft (3); the driving gear (6) meshes with the driven gear (7); a rotor cavity (101) is provided in the pump housing (1), the rotor (2) is provided in the rotor cavity (101), a left inlet and outlet cavity (102) is connected to the left side of the middle of the rotor cavity (101), and a right inlet and outlet cavity (103) is connected to the right side of the middle of the rotor cavity (101), and two openings are provided on both the left inlet and outlet cavity (102) and the right inlet and outlet cavity (103).

2. The self-priming gear pump according to claim 1, characterized in that: The rotor (2) is arranged in a cylindrical shape as a whole, and three spiral grooves are arranged at intervals on the outer wall of the rotor (2), and transition fillets are arranged at the edges of the spiral grooves.

3. The self-priming gear pump according to claim 1, characterized in that: The two openings on the left inlet and outlet chamber (102) are respectively arranged on the top surface and the side surface of the left inlet and outlet chamber (102), and the two openings on the right inlet and outlet chamber (103) are respectively arranged on the top surface and the side surface of the right inlet and outlet chamber (103).

4. The self-priming gear pump according to claim 3, characterized in that: The connection between the rotor chamber (101) and the left inlet and outlet chamber (102) is arranged in coordination with the opening on the side of the left inlet and outlet chamber (102), and the connection between the rotor chamber (101) and the right inlet and outlet chamber (103) is arranged in coordination with the opening on the side of the right inlet and outlet chamber (103).

5. The self-priming gear pump according to claim 1, characterized in that: The driven shaft (3) is arranged above the driving shaft (4); a gear box (5) is arranged on one side of the pump housing (1) via bolts; the driven shaft (3) penetrates the pump housing (1) and is rotatably arranged on the gear box (5) via a bearing; the driving shaft (4) penetrates the pump housing (1) and is rotatably arranged on the gear box (5) via a bearing; and the driving shaft (4) penetrates the gear box (5).

6. The self-priming gear pump according to claim 5, characterized in that: The driving gear (6) and the driven gear (7) are both arranged in the gear box (5).

7. The self-priming gear pump according to claim 5, characterized in that: A circular ring platform (8) is provided on the front and rear inner walls of the gear box (5) to match the bearing of the driven shaft (3).

8. The self-priming gear pump according to claim 5, characterized in that: A second circular ring platform (9) is provided on the front and rear inner walls of the gear box (5) to match the bearing of the driving shaft (4).

9. The self-priming gear pump according to claim 5, characterized in that: A cover plate (10) is provided at the top of the gear box (5).

10. The self-priming gear pump according to claim 5, characterized in that: An end cover (11) is provided on a side of the pump housing (1) away from the gear box (5).

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