Low-noise motor integrated diaphragm pump

Abstract

The utility model discloses a low-noise motor integrated diaphragm pump which improves the stability of a motor and effectively reduces noise output. According to the technical scheme, the low-noise motor integrated diaphragm pump comprises a diaphragm pump body, a motor shaft is transversely arranged in a pump body of the diaphragm pump body, the motor shaft is driven by a motor arranged in the pump body, the two ends of the motor shaft are connected with a first bearing and a second bearing which are arranged in the pump body, and the first bearing and the second bearing are arranged in the pump body. The second bearing and the end of the motor shaft are fixed together through a screw, the screw is a round head screw, an inner ring on the outer side of the second bearing is pressed and fixed to the motor shaft in the axial direction of the motor shaft, a wave pad is arranged on the inner side of the second bearing and installed on the motor shaft in a sleeving mode, one side of the wave pad abuts against the pump body, and the other side of the wave pad abuts against the pump body. The other side of the wave pad abuts against the outer ring of the second bearing to form pre-tightening force on the second bearing. The diaphragm pump can be widely applied to the field of diaphragm pumps.

Description

TECHNICAL FIELD

[0001] The utility model relates to a low noise motor integral type diaphragm pump belongs to diaphragm pump technical field. BACKGROUND

[0002] In modern society, diaphragm pump as a common fluid conveying equipment, is widely used in chemical industry, medicine, water treatment, food processing and many other fields. With the continuous improvement of people's requirements for working environment and quality of life, low noise operation of diaphragm pump has become a new demand of the market.

[0003] The traditional motor integral type diaphragm pump has the problem of high noise in the running process, which greatly affects its use experience and application range. The main sources of noise include electromagnetic noise of motor operation, vibration noise of mechanical transmission components and airflow noise generated by fluid flowing in the pump cavity.

[0004] In terms of motor operation, the electromagnetic noise of the motor is mainly caused by the vibration of the stator and rotor caused by the change of the electromagnetic field inside the motor. This vibration will be transmitted to the surrounding air through the motor shell, forming noise. In addition, the centrifugal force generated by the unbalanced mass of the rotor during high-speed rotation will also cause the vibration of the whole motor, further aggravating the generation of noise.

[0005] In terms of mechanical transmission components, the motor integral type diaphragm pump usually adopts eccentric wheel and other transmission mechanisms to drive the diaphragm to make reciprocating motion. However, the eccentric wheel is not balanced when rotating, which will produce periodic changes, causing up and down vibration. This vibration will be transmitted to other components of the pump body, causing vibration and noise of the whole pump. Especially when running at high speed, the vibration and noise will be more obvious.

[0006] The flow of fluid in the pump cavity will also produce airflow noise. When the fluid passes through the valve, diaphragm and other components in the pump cavity, vortex, impact and pressure fluctuation phenomena will be formed, which will produce noise. In addition, factors such as flow rate, viscosity and density of fluid will also affect the size of airflow noise.

[0007] In order to reduce the noise of motor integral type diaphragm pump, some technologies are currently being tried, such as adding sound insulation materials on the pump body, optimizing the electromagnetic design of the motor, improving the mechanical transmission structure, etc. However, these methods often have certain limitations. For example, adding sound insulation materials will increase the volume and cost of the pump, and the sound insulation effect is limited; optimizing the electromagnetic design of the motor requires high technical investment and complex manufacturing process; improving the mechanical transmission structure may affect the performance and reliability of the pump.

[0008] In summary, the existing motor integrated diaphragm pump still has a large improvement space in low noise design, and a new technical scheme is needed to effectively solve the noise problem and improve the performance and use experience of the diaphragm pump. Utility model content

[0009] The utility model overcomes the insufficient of prior art, provides a low noise motor integrated diaphragm pump, increases motor stability, effectively reduces noise output.

[0010] In order to solve the above technical problems, the utility model adopts the technical scheme of a low noise motor integrated diaphragm pump, including the diaphragm pump body, the motor shaft is laterally arranged in the pump body, the motor shaft is driven through the motor arranged in the pump body, the both ends of the motor shaft are connected with the first bearing and the second bearing arranged in the pump body, the second bearing and the end of the motor shaft are fixed together through the screw, the screw is round head screw, and the inner ring of the second bearing outside is pressed and fixed on the motor shaft along the axial direction of the motor shaft, the wave pad is arranged on the inside of the second bearing, the wave pad is sleeved on the motor shaft, one side of the wave pad is abutted on the pump body, the other side of the wave pad is abutted on the outer ring of the second bearing, and the pre-tightening force is formed to the second bearing.

[0011] Further, the outer side end of the first bearing and the second bearing is provided with a plug, and the end of the plug is sealed with the outer ring of the first bearing and the second bearing and the pump body through sealing glue.

[0012] Further, the pump body on the side of the motor is provided with an end cover, the motor shaft penetrates the end cover and is arranged, and the second bearing is located on the outside of the end cover.

[0013] Further, the end cover and the pump body are provided with a sealing ring on the abutting surface between them.

[0014] Further, the bottom of the pump body is provided with a visual window, the outside of the visual window is provided with a bottom cover, and the bottom cover covers the outside of the visual window and is connected with the pump body.

[0015] The utility model discloses a motor shaft and the first bearing glue dead, the other end lock screw and second bearing fixed, the second bearing rear place wave pad, and wave pad is pressed against the second bearing outer ring, and the pre-tightening force is formed to the second bearing, and the second bearing backlash is offset, and the mechanical noise of second bearing is effectively reduced, and the motor axial stringing of the processing error is offset, and the motor stability is increased. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model makes further explanation in combination with the drawings.

[0017] Figure 1 It is the structure schematic diagram of the utility model.

[0018] Figure 2 It is the bottom view of the utility model.

[0019] Figure 3 It is the three-dimensional structure schematic diagram of the utility model and removes bottom cover.

[0020] In the drawing: 1 is diaphragm pump body, 2 is motor shaft, 3 is first bearing, 4 is second bearing, 5 is plug, 6 is screw, 7 is wave pad, 8 is end cover, 9 is sealing ring, 10 is visualization window, 11 is bottom cover. DETAILED DESCRIPTION

[0021] The utility model makes further explanation in combination with the drawings.

[0022] As Figure 1 , Figure 2 and Figure 3As shown, the utility model discloses a low noise motor integral type diaphragm pump, including diaphragm pump body 1, the pump body 1 of diaphragm pump body 1 is provided with motor shaft 2 in the pump body transversely, the motor shaft 2 is driven through the motor of setting in the pump body, the both ends of motor shaft 2 are connected with first bearing 3 and second bearing 4 of setting in the pump body, the end between second bearing 4 and motor shaft 2 is fixed together through screw 6, the screw 6 is round head screw, and the inner ring of the outer side of second bearing 4 is fixed tightly on motor shaft 2 along the axial direction of motor shaft 2, the inner side of second bearing 4 is provided with wave pad 7, the wave pad 7 is sleeved on motor shaft 2, one side of wave pad 7 abuts on the pump body, the other side of wave pad 7 abuts on the outer ring of second bearing 4, and pre-tightening force is formed to second bearing 4, the outer side end of first bearing 3 and second bearing 4 is provided with plug 5, and the end of plug 5 is sealed with the outer ring of first bearing 3 and second bearing 4, the pump body through sealing glue.The pump body on the motor side is provided with end cover 8, motor shaft 2 passes through end cover 8 and is provided, second bearing 4 is located the outer side of end cover 8, and sealing ring 9 is arranged on the lamination surface between end cover 8 and the pump body.

[0023] The bottom of the pump body is provided with a visual window 10, and the outer side of the visual window 10 is provided with a bottom cover 11.

[0024] In the utility model, one end of the motor shaft 2 is glued to the first bearing 3, the other end is locked with the second bearing 4 by the screw 6, the wave pad 7 is placed behind the second bearing 4, the wave pad 7 abuts against the outer ring of the second bearing 4, pre-tightening force is formed to the second bearing 4, the runout of the second bearing 4 is offset, the mechanical noise of the second bearing 4 is effectively reduced, the axial movement of the motor shaft caused by the machining error is offset, and the stability of the motor is increased. The first bearing 3 and the second bearing 4 are blocked by the plug 5 and the glue, the motor noise is isolated inside, the noise output is effectively reduced, and the first bearing 3 and the second bearing 4 are protected from damage. The sealing ring 9 is installed between the end cover 8 and the pump body, water droplets are prevented from entering the drive board to cause burning, the visual window 10 is arranged at the bottom of the pump body, the bottom cover 11 is removed, and the running condition inside the pump body can be directly observed, so that observation and maintenance are facilitated.

[0025] The embodiments of the utility model are described in detail in combination with the drawings above, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model.

Claims

1. A low-noise integrated diaphragm pump with a motor, comprising a diaphragm pump body (1), wherein a motor shaft (2) is transversely arranged within the pump body of the diaphragm pump body (1), the motor shaft (2) is driven by a motor disposed within the pump body, and both ends of the motor shaft (2) are connected to a first bearing (3) and a second bearing (4) disposed within the pump body, characterized in that, The second bearing (4) is fixed to the end of the motor shaft (2) by a screw (6). The screw (6) is a round head screw, which is fixed along the axial direction of the motor shaft (2) to press and fix the inner ring of the second bearing (4) to the motor shaft (2). A wave washer (7) is provided on the inner side of the second bearing (4). The wave washer (7) is fitted on the motor shaft (2). One side of the wave washer (7) is against the pump body, and the other side of the wave washer (7) is against the outer ring of the second bearing (4), forming a preload force on the second bearing (4).

2. The low-noise integrated motor diaphragm pump according to claim 1, characterized in that, The outer ends of the first bearing (3) and the second bearing (4) are provided with plugs (5), and the ends of the plugs (5) are sealed with sealant between the outer rings of the first bearing (3) and the second bearing (4) and the pump body.

3. The low-noise integrated motor diaphragm pump according to claim 1, characterized in that, An end cover (8) is provided on the pump body located on one side of the motor. The motor shaft (2) is provided through the end cover (8). The second bearing (4) is located on the outside of the end cover (8).

4. A low-noise integrated motor diaphragm pump according to claim 3, characterized in that, A sealing ring (9) is provided on the mating surface between the end cap (8) and the pump body.

5. A low-noise integrated motor diaphragm pump according to claim 1, characterized in that, A visualization window (10) is provided at the bottom of the pump body, and a bottom cover (11) is provided on the outside of the visualization window (10). The bottom cover (11) covers the outside of the visualization window (10) and is connected to the pump body.

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