Self-priming pump

Abstract

The utility model provides a self-priming pump, and belongs to the technical field of pumps. The technical problem that leaked water of a pump shell of an existing self-priming pump can permeate into a motor to cause damage to the motor is solved. A self-priming pump comprises a motor and a pump shell, an impeller is arranged in the pump shell, the motor comprises a rotating shaft, one end of the rotating shaft is fixedly connected with the impeller, a fixed connecting piece is fixedly connected between the motor and the pump shell, the motor comprises a machine shell, the machine shell abuts against and is fixed to one end of the fixed connecting piece, and the other end of the fixed connecting piece abuts against and is fixed to the pump shell. A cavity is formed in the middle of the fixed connecting piece, and the rotating shaft penetrates through the cavity to be fixedly connected with the impeller. According to the utility model, liquid in the pump shell can be effectively prevented from leaking into the motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of pumps, in particular to a self-priming pump. Background Art

[0002] Before starting the self-priming pump, the pump casing must be filled with water. After starting, the motor drives the impeller to rotate at high speed to generate high pressure, causing the water in the impeller groove to flow to the volute. At this time, a vacuum is formed at the inlet. Due to the effect of atmospheric pressure, the air and liquid in the pump and pipeline are sucked into the impeller through the water inlet and the trumpet-shaped nozzle, and then enter the water outlet of the pump body through the guide groove in the guide vane and are ejected out.

[0003] The structure of the self-priming pump is relatively compact. The pump casing and the motor casing are directly fixedly connected. The motor shaft passes through the impeller cavity in the pump casing and is fixed to the impeller. Since a certain amount of drainage water is stored in the impeller cavity of the pump casing, the seal between the motor shaft and the pump casing will be damaged after long-term use, causing leakage, which will affect the motor. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a self-priming pump that can effectively prevent the liquid in the pump casing from leaking into the motor.

[0005] The objectives of the utility model can be achieved through the following technical solutions: A self-priming pump, comprising a motor and a pump casing, an impeller is arranged in the pump casing, the motor comprises a rotating shaft, one end of the rotating shaft is fixedly connected to the impeller, a fixing part is fixedly connected between the motor and the pump casing, the motor comprises a casing, the casing is abutted and fixed to one end of the fixing part, the other end of the fixing part is abutted and fixed to the pump casing, the fixing part has a cavity in the middle, the rotating shaft passes through the cavity and is fixedly connected to the impeller.

[0006] Furthermore, the connecting part has a bearing seat protruding toward the direction of the motor, a bearing is arranged in the bearing seat, a seal is also fixedly arranged in the bearing seat, a fixing plate is fixedly connected to the end of the bearing seat, and a connecting machine foot is formed on the outer peripheral surface of the connecting part.

[0007] Furthermore, the fastening member has a sealing seat protruding toward the pump housing, the sealing seat is coaxially arranged with the bearing seat, and a second sealing member is arranged in the sealing seat.

[0008] Furthermore, the fastening member has an annular seat protruding toward the pump housing and coaxial with the sealing seat, one end of the annular seat abuts against the pump housing, and a cavity is formed inside the annular seat.

[0009] Furthermore, the fastening member has a fixed ring seat protruding toward the pump housing, the pump housing has a fixed block protruding toward the fastening member, and the fixed ring seat is sleeved on the outer periphery of the fixed block and fixedly connected to the pump housing.

[0010] Furthermore, a third seal is provided between the pump casing and the rotating shaft.

[0011] Compared with the prior art, the technical effects of the present invention are as follows: 1. By providing a fastener between the motor and the pump casing, and providing a cavity in the fastener to separate the motor and the pump casing from the direct fixed connection, the liquid in the pump casing is isolated and prevented from penetrating or leaking into the motor, effectively protecting the normal operation of the motor. 2. A fastener foot is formed on the outer periphery of the fastener, which is used to fix the entire self-priming pump to the outside. The bearing seat is formed on the fastener to prevent the bearing from shaking, so that the bearing can better support the motor shaft. 3. The sealing effect of the entire machine is improved by seals 1, 2, and 3. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the utility model.

[0013] Figure 2 This utility model is a three-dimensional fastening piece Figure 1 .

[0014] Figure 3 This utility model is a three-dimensional fastening piece Figure 2 .

[0015] Figure number marking: 1. Motor; 2. Pump casing; 21. Fixed block; 201. Impeller chamber; 3. Impeller; 4. Rotating shaft; 5. Fastener; 501. Cavity; 51. Bearing seat; 52. Fastener foot; 53. Seal seat; 54. Ring seat; 55. Fixed ring seat; 6. Casing; 7. Bearing; 8. Seal 1; 9. Fixed plate; 10. Seal 2; 11. Seal 3. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] It should be noted that the descriptions of the present invention regarding directions such as "up", "down", "left", "right", "top", and "bottom" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0018] according to Figures 1 to 3As shown, a self-priming pump includes a motor 1 and a pump housing 2. The motor 1 includes a housing 6, a rotor and a stator disposed within the housing 6, and a rotating shaft 4 that rotates with the rotor. The rotating shaft 4 is supported by a bearing 7. One end of the rotating shaft 4 extends out of the motor 1 and into the pump housing 2 to be fixedly connected to the impeller 3. The rotating shaft 4 drives the impeller 3 to rotate. The pump housing 2 has a water inlet chamber and a water outlet chamber. The lower parts of the water inlet chamber and the water outlet chamber are connected to the impeller 3 chamber 201. The impeller 3 is located in the impeller 3 chamber 201. Liquid is stored in the impeller 3 chamber 201. A seal 3 11 is provided between the pump housing 2 and the rotating shaft 4. The seal 3 11 can prevent liquid from leaking out of the impeller 3 chamber 201.

[0019] To prevent liquid from seeping or leaking into the motor 1 from the pump housing 2 and effectively protect the normal operation of the motor 1, a fastening member 5 is fixedly connected between the motor 1 and the pump housing 2. The motor 1 and the pump housing 2 are located at the left and right ends of the fastening member 5. The housing 6 abuts and is fixed to one end of the fastening member 5, and the other end of the fastening member 5 abuts and is fixed to the pump housing 2. The fastening method can be bolted. A cavity 501 is provided in the middle of the fastening member 5, which separates the motor 1 and the pump housing 2 from direct contact.

[0020] The fastener 5 is an integrally formed part, and its specific structure includes a bearing seat 51, a sealing seat 53, an annular seat 54 and a fixed ring seat 55, which are all annular and coaxial. The sealing seat 53, the annular seat 54 and the fixed ring seat 55 are located on the same side of the fastener 5, that is, the side close to the pump casing 2. The bearing seat 51 is located on the other side of the fastener 5, that is, the side close to the motor 1, which is conducive to the installation of the bearing 7. A seal 1 8 is also provided in the bearing seat 51, and a fixing plate 9 is fixedly connected to the end of the bearing seat 51, and the fixed connection is fixed by bolts. The diameters of the sealing seat 53, the annular seat 54 and the fixed ring seat 55 of the fastener 5 protruding toward the pump casing 2 are increased once, and a seal 2 10 is provided in the sealing seat 53.

[0021] The pump housing 2 has a fixed block 21 protruding toward the connecting member 5. A fixed ring seat 55 is sleeved around the outer periphery of the fixed block 21 and fixedly connected to the pump housing 2, so that one end of the annular seat 54 abuts against the pump housing 2, forming a cavity 501 within the annular seat 54. A connecting foot 52 is formed on the outer periphery of the connecting member 5. The connecting foot 52 is used to secure the entire self-priming pump to the outside. The bearing seat 51 is molded onto the connecting member 5 to prevent the bearing 7 from shaking and better support the motor 1 shaft 4.

[0022] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection defined by the claims of the present invention.

Claims

1. A self-priming pump, comprising a motor (1) and a pump housing (2), wherein an impeller (3) is disposed in the pump housing (2), the motor (1) comprises a rotating shaft (4), one end of the rotating shaft (4) is fixedly connected to the impeller (3), and is characterized in that: A connecting member (5) is fixedly connected between the motor (1) and the pump housing (2). The motor (1) includes a housing (6). The housing (6) abuts against and is fixed to one end of the connecting member (5). The other end of the connecting member (5) abuts against and is fixed to the pump housing (2). A cavity (501) is provided in the middle of the connecting member (5). The rotating shaft (4) passes through the cavity (501) and is fixedly connected to the impeller (3).

2. A self-priming pump according to claim 1, characterized in that: The connecting member (5) has a bearing seat (51) protruding toward the direction of the motor (1), a bearing (7) is arranged in the bearing seat (51), a sealing member (8) is also fixedly arranged in the bearing seat (51), a fixing plate (9) is fixedly connected to the end of the bearing seat (51), and a connecting machine foot (52) is formed on the outer peripheral surface of the connecting member (5).

3. A self-priming pump according to claim 2, characterized in that: The fastening member (5) has a sealing seat (53) protruding toward the pump housing (2). The sealing seat (53) is coaxially arranged with the bearing seat (51), and a second sealing member (10) is arranged in the sealing seat (53).

4. A self-priming pump according to claim 3, characterized in that: The fastening member (5) has an annular seat (54) protruding toward the pump housing (2) and coaxial with the sealing seat (53). One end of the annular seat (54) abuts against the pump housing (2), and a cavity (501) is formed inside the annular seat (54).

5. A self-priming pump according to claim 4, characterized in that: The fastening member (5) has a fixed ring seat (55) protruding toward the pump housing (2), and the pump housing (2) has a fixed block (21) protruding toward the fastening member (5). The fixed ring seat (55) is sleeved on the outer periphery of the fixed block (21) and is fixedly connected to the pump housing (2).

6. A self-priming pump according to claim 1, characterized in that: A sealing member 3 (11) is provided between the pump housing (2) and the rotating shaft (4).

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