WO2009103217A1

WO2009103217A1 - A multi-stage diaphragm pump

Info

Publication number: WO2009103217A1
Application number: PCT/CN2009/000043
Authority: WO
Inventors: 陆新
Original assignee: 常州富邦电气有限公司
Priority date: 2008-02-20
Filing date: 2009-01-13
Publication date: 2009-08-27

Abstract

A multi-stage diaphragm pump has a casing in which is provided a plurality of gas chambers, wherein each gas chamber has a gas inlet valve, a gas outlet valve and an elastic diaphragm (6), the elastic diaphragm (6) of each gas chamber is connected to one transmission assembly (8, 8') which is connected to a rotating shaft (2) driven by an electric motor (1). At least two stages of upper and lower gas chambers (9, 9') are provided, each of which includes four gas chambers being equally spaced in circumference. Accordingly, the rotating shaft (2) is provided with two stages of upper and lower eccentric cams, each of which includes two upper and lower opposite eccentric cams, and two adjacent transmission assemblies in one stage are sleeved on one respective eccentric cam.

Description

Multi-stage diaphragm pump

The utility model relates to a multi-stage diaphragm pump, belonging to a gas variable volume fluid delivery pump.

Background technique

The diaphragm pump is a gas variable displacement fluid transfer pump, which drives the eccentric shaft to rotate by the motor, and the eccentric shaft drives the driving element to reciprocate, and the diaphragm connected to the driving element periodically shrinks or expands the air chamber, thereby causing the air to open and close. , to achieve the delivery of the medium. There is a four-chamber diaphragm pump, the eccentric shaft has only one slanting, and the four 90-degree driving elements are mounted on the eccentric shaft. With the rapid rotation of the shaft, the four driving elements are sequentially changed to different degrees. Telescopic. However, this kind of driving structure is bound to cause the non-equilibrium of the components in the diaphragm pump to become a large vibration. This vibration is especially noticeable when the motor is running at a higher rotational speed, and a large noise is generated along with the vibration. It also reduces the life of the diaphragm pump and is less efficient.

Summary of the invention

In order to overcome the above-mentioned deficiencies of the existing diaphragm pump, the utility model provides a double-layer multi-chamber diaphragm pump with low working vibration, low noise and long service life.

The multi-stage diaphragm pump of the utility model has a plurality of air chambers in the casing, and each air chamber is provided with an intake valve, an air outlet valve and an elastic diaphragm, and the elastic diaphragms of each air chamber are respectively connected with a transmission component, and the transmission components are the same A motor-driven rotating shaft is connected, at least two upper and lower air chambers are arranged, and each stage comprises four air chambers arranged at equal intervals in the circumference, and the rotating shaft is correspondingly provided with upper and lower two-stage convexity, each level of convexity includes upper, The next two reverse convexities, the two adjacent transmission components of the same stage are sleeved on the same convexity.

When the diaphragm pump is driven by the motor and the rotating shaft rotates rapidly, the four air chambers in each group are separately exhausted and inhaled, but the two air chambers in the four air chambers are in a state of change. The same, so that the diaphragm pump balance, fundamentally reduce the vibration and noise of the diaphragm pump, keep working in a quiet environment, and also extend the life of the diaphragm pump, and the pump contains a multi-stage air chamber, and the work efficiency is further improved.

DRAWINGS

1 is a schematic cross-sectional view of a diaphragm pump of the present invention.

Figure 2 shows the hinge structure.

Figures 3-6 show the periodic changes of the four chambers of the diaphragm pump, respectively. In the figure: 1 is the motor, 2 is the rotating shaft, 2-1, 2- 2 is the first-order deflection, 2-1', 2- 2' is the second-order deflection, 3 is the casing, 4 is the shaft bearing, 5 For the top cover, 6 is the diaphragm, 7 is the limit plate, 8 is the first-stage transmission component, 8' is the secondary. The transmission component, 9 is the upper air chamber, and 9' is the secondary air chamber.

detailed description

The structure of the embodiment of the two-stage diaphragm pump of the present invention will be further described below with reference to the accompanying drawings.

As shown in Fig. 1, the diaphragm pump comprises a rotating shaft 2 connected to the motor 1, the rotating shaft 2 is provided with a bearing 4, an upper first-stage air chamber 9, and a lower-level secondary air chamber 9', each of which has a circumferentially equidistant four. In the air chamber (see Fig. 3), the rotating shaft 2 is provided with four eccentricities 2-2, 2-1, 2-2', 2-1' which are reversed in order from top to bottom (Fig. 2). 3 to 6 show that the upper first stage air chamber 9 includes four air chambers 9-1, 9-2, 9-3 and 9-4, and is distributed at intervals of 90 degrees, and each of the air chambers is respectively provided with elasticity. The diaphragm 6, each diaphragm 6 is respectively connected to a transmission assembly 8; a pair of two adjacent transmission assemblies 8 are respectively sleeved on the eccentric 2-1, 2- 2 . The lower secondary gas chamber 9' also contains four gas chambers with a circular phase of 90 degrees, and its layout corresponds to the four primary gas chambers 9-1, 9-2, 9-3, and 9-4. The connection manner of the convex 2-, 2- 2' is also the same as that of the upper structure, and the close-up view of the secondary air chamber is omitted here.

When the rotating shaft 2 rotates at a high speed, the first four air chambers of the upper layer of the diaphragm pump and the second four air chambers of the lower layer are periodically changed in synchronization, and the inhalation and exhaust processes are repeated. Fig. 3 to Fig. 6 show the change process of the air chambers in the upper level in one cycle of the rotation of the shaft 2 by 360 degrees.

As shown in the state of Fig. 3, the lobes 2-1 and 2-2 are in the left and right positions of the rotary shaft 2, and the diaphragms of the air chambers 9-1 and 9_3 are pushed to the limit by the transmission assembly, and the air chambers 9-1 and 9- 3 is at the minimum volume, the indoor air is exhausted; and the other pair of air chambers 9-2 and 9-4 are in the middle position, the air chambers 9-2 and 9-4 are in the middle position, and the volume is being reduced.

Figure 4 shows that the rotary shaft 2 is rotated clockwise by 90 degrees on the basis of the state of Fig. 3, at which time the lobes 2-1 and 2-2 are in the front and rear positions of the rotary shaft 2, and the diaphragms of the gas chambers 9-2 and 9-4. Both are pushed to the limit by the transmission assembly, at the minimum volume, the gas has been exhausted, and the diaphragms of the chambers 9-1 and 9-3 are in the process of being pulled out by the transmission assembly, the volumes of the chambers 9-1 and 9-3 In the middle.

Fig. 5 shows that the rotary shaft 2 is rotated clockwise by 90 degrees on the basis of the state of Fig. 4, at which time the lobes 2-1 and 2-2 are in the right and left positions of the rotary shaft 2, and the diaphragms of the gas chambers 9-1 and 9-3 Both are stretched to the limit by the transmission assembly, the two chambers are in the inspiratory state of the maximum volume; and the diaphragms of the chambers 9-2 and 9-4 are in the middle position.

Fig. 6 shows that the rotary shaft 2 is rotated clockwise by 90 degrees on the basis of the state of Fig. 5, at which time the knurls 2-1 and 2-2 are in the rear and front positions of the rotary shaft 2, and the diaphragms of the air chambers 9-1 and 9-3 Both are pushed to the neutral position by the transmission assembly; while the diaphragms of the chambers 9-2 and 9-4 are stretched to the limit by the transmission assembly, and the two chambers are at the maximum volume, inhaling the gas. At this point, the diaphragm pump completes a cycle of suction and exhaust processes, and then continues to repeat the above cycle process. In the same way, the change process of the lower two-level air chambers is the same as the one-to-one correspondence of the upper layers.

It can be seen from the variation process of FIG. 3 to FIG. 6 that the change positions of the two gas chambers which are mutually aligned in the four gas chambers are always the same, thereby keeping the diaphragm pump in balance and fundamentally reducing the vibration and noise of the diaphragm pump. The multi-stage air chamber further improves work efficiency.

Claims

Rights request

1. Multi-stage diaphragm pump, the casing contains a plurality of air chambers, each air chamber is provided with an air intake threshold, an air outlet width and an elastic diaphragm, and the elastic diaphragms of each air chamber are respectively connected with a transmission component, and each transmission component is the same The motor-driven rotating shaft is connected, and is characterized in that at least two upper and lower air chambers are arranged, and each stage comprises four air chambers arranged at equal intervals in the circumference, and the rotating shaft is correspondingly provided with upper and lower two-stage convexity, each level of convexity includes The upper and lower two reverse convexities, the two adjacent transmission components of the same level are sleeved on the same convexity.