CN212318292U - Energy-saving efficient low-noise screw vacuum pump - Google Patents

Abstract

The utility model provides an energy-conserving high-efficient low noise screw vacuum pump belongs to mechanical technical field. It has solved the big problem of current vacuum pump energy consumption. This energy-conserving high-efficient low noise screw vacuum pump is including the pump body that has air inlet and gas vent, and the outside of the pump body is equipped with the shell of ventilating, and the shell of ventilating has the absorption chamber of intercommunication gas vent, is equipped with on the shell of ventilating to be used for adsorbing intracavity gas outgoing's sprayer, and the quantity of sprayer is two at least and all parallelly connected setting, and the vacuum pump still includes the control structure according to pump body gas vent pressure control sprayer opening quantity. The screw vacuum pump with high efficiency and low noise has the advantage of low energy consumption.

Description

Energy-saving efficient low-noise screw vacuum pump

Technical Field

The utility model belongs to the technical field of machinery, a energy-conserving high-efficient low noise screw vacuum pump is related to.

Background

The screw vacuum pump is an air extraction device which utilizes the air suction and exhaust functions generated by a pair of screws rotating in a pump shell in a synchronous high-speed reverse direction, can extract gas containing a large amount of water vapor and a small amount of dust, and is widely applied to the fields of enterprises with higher requirements on clean vacuum, such as domestic pharmacy, chemical industry, semiconductors and the like.

Because the energy consumption of the screw vacuum pump has a direct relation with the pressure difference of the air inlet and the air outlet, in other words, under the condition that the inlet pressure of the screw vacuum pump is not changed, the energy consumption of the screw vacuum pump can be reduced by reducing the pressure of the air outlet. Therefore, in the prior art, in order to reduce the energy consumption of the screw vacuum pump during operation, the pitch of the screw is improved, for example, chinese patent literature discloses an energy-saving low-noise variable pitch screw vacuum pump [ patent no: 201520932917.5, respectively; application publication No.: CN205190219U ].

The screw pitch of the screw rod is set from the air inlet to the air outlet to be a structure from small to large and then to small, so that the pressure of the air outlet is reduced under the condition that the pressure of the air inlet of the screw rod vacuum pump is unchanged, and the energy-saving effect is achieved. However, the structure has high requirements on the machining precision of the screw, and needs to adjust the related structure matched with the screw in the screw vacuum pump, so that the machining cost of the screw vacuum pump is increased, and the popularization is not facilitated.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide an energy-conserving high-efficient low noise screw vacuum pump, solve the big problem of vacuum pump energy consumption.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides an energy-conserving high-efficient low noise screw vacuum pump, is including the pump body that has air inlet and gas vent, its characterized in that, the outside of the pump body is equipped with the shell of ventilating, the shell of ventilating has the absorption chamber of intercommunication gas vent, be equipped with on the shell of ventilating and be used for adsorbing intracavity gas outgoing's sprayer, the quantity of sprayer is two at least and all parallelly connected setting, and the vacuum pump still includes the control structure that opens quantity according to pump body gas vent pressure control sprayer.

The ejector is the working principle of the prior art: compressed air is sprayed at a high speed through an outlet of the ejector, jet flow is formed at the outlet of the ejector to generate entrainment flow, and under the entrainment effect, air around the outlet of the ejector is continuously sucked away to form a certain vacuum degree. This application sets up the shell of ventilating with the gas vent intercommunication on the pump body, consequently adsorbs the chamber by the gaseous meeting entering of pump body gas vent gas, and the gaseous emission of ejector suction adsorption intracavity is to the external world, and the ejector makes the gaseous quick discharge in the adsorption cavity and pumps the exhaust of pump body gas vent, makes pump body exhaust speed improve, and then makes the gas vent of the pump body form the negative pressure, reduces the energy consumption of vacuum pump from this.

Further, the displacement of vacuum pump is the change, and this application connects ejector parallel arrangement, controls the opening quantity of ejector through control structure, makes the displacement of vacuum pump and the inspiratory capacity of ejector match through the combination of a plurality of ejectors promptly, and then makes pump body gas vent maintain the negative pressure state, further reduces the energy consumption of vacuum pump from this. The air suction ports of different ejectors can be set to different calibers so as to further improve the matching degree of the exhaust volume of the vacuum pump and the suction volume of the ejectors.

In the above energy-saving high-efficiency low-noise screw vacuum pump, the control structure comprises a sensor for detecting the pressure of the exhaust port of the pump body and a controller for controlling the opening number of the ejectors, and the controller is electrically connected with the sensor. The pressure of the exhaust port of the pump body is detected by the sensor, and a detection signal is fed back to the controller in real time, so that the controller controls the opening number of the ejectors, and the exhaust volume of the vacuum pump is matched with the suction volume of the ejectors.

In the above energy-saving high-efficiency low-noise screw vacuum pump, the sensor has a detection head, and the detection head is located in the adsorption cavity. The ejector sucks the gas in the adsorption cavity, so the sensor detects the gas pressure in the adsorption cavity, the matching degree of the exhaust amount of the vacuum pump and the suction amount of the ejector is improved, and the energy consumption of the vacuum pump is further reduced.

In the above energy-saving high-efficiency low-noise screw vacuum pump, the adsorption cavity has an inlet section for air to enter, and the injectors have air suction ports arranged in the direction of the inlet section. The structure guides the gas in the adsorption cavity to flow towards the gas suction port, and accelerates the discharge of the gas in the adsorption cavity, thereby reducing the energy consumption of the vacuum pump.

In the energy-saving high-efficiency low-noise screw vacuum pump, the adsorption cavity is tapered, and the sectional area of the adsorption cavity is gradually increased from the inlet section. On one hand, the wall of the adsorption cavity guides the gas entering the adsorption cavity to accelerate the flow rate of the gas, so that the effect of reducing energy consumption is improved; on the other hand, the flow velocity of the gas in the adsorption cavity is accelerated through the change of the sectional area of the adsorption cavity, so that the energy consumption of the vacuum pump is reduced.

In the above-mentioned energy-saving high-efficiency low-noise screw vacuum pump, the vent casing includes a partition part and the partition part partitions the interior of the vent casing into an exhaust chamber communicated with the outside and the above-mentioned adsorption chamber, and the ejector is mounted on the partition part and the ejector is communicated with the exhaust chamber and the adsorption chamber. The gas in the adsorption cavity is exhausted to the exhaust cavity through the ejector, and then the gas is exhausted to the outside. The ejector is mounted on the partition portion, so that the exhaust cavity can protect the ejector, and the structure mounted outside the vacuum pump is compact.

In the above energy-saving high-efficiency low-noise screw vacuum pump, the partition is provided with an overflow valve through which gas in the adsorption cavity can flow to the exhaust cavity. If the air pressure in the adsorption cavity is too large, the overflow valve is opened, so that the air pressure in the adsorption cavity is constant, and the working stability of the ejector is ensured.

In the above energy-saving high-efficiency low-noise screw vacuum pump, the exhaust cavity has an outlet section, and the caliber of the outlet section is larger than that of the inlet section. The structure further aerates the flow rate of the gas in the shell to maintain the negative pressure state of the exhaust port of the vacuum pump, thereby reducing the energy consumption of the vacuum pump.

Compared with the prior art, the utility model provides a pair of energy-conserving high-efficient low noise screw vacuum pump has following advantage:

1. the ejectors are arranged in parallel, the controller controls the opening number of the ejectors, the exhaust volume of the vacuum pump is matched with the suction volume of the ejectors through the ejectors, and the exhaust port of the pump body is maintained in a negative pressure state so as to reduce the energy consumption of the vacuum pump.

2. The wall of the adsorption cavity can guide gas to the air suction port of the ejector in a targeted manner, and the direction of the air suction port is matched with the flow direction of the gas in the adsorption cavity, so that the flow speed of the gas in the adsorption cavity is accelerated, and the energy consumption of the vacuum pump is reduced.

Drawings

FIG. 1 is a first schematic view of a connection structure of an aeration shell and a vacuum pump.

Fig. 2 is a schematic view of a connection structure of the vent housing and the vacuum pump.

Figure 3 is a cross-sectional view of the present vent housing.

In the figure, 1, a pump body; 11. an air inlet; 12. an exhaust port; 2. ventilating the shell; 21. an adsorption chamber; 211. an inlet section; 22. an exhaust chamber; 221. an outlet section; 23. a partition portion; 3. an ejector; 31. an air suction port; 4. a control structure; 41. a sensor; 411. a detection head; 5. an overflow valve.

Detailed Description

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

As shown in fig. 1 and 2, the energy-saving, efficient and low-noise screw vacuum pump includes a pump body 1, the pump body 1 has an air inlet 11 and an air outlet 12, and a ventilation casing 2 communicating with the air outlet 12 and discharging air is provided outside the pump body 1.

As shown in fig. 3, in the present embodiment, two injectors 3 are provided in the ventilation housing 2, the number of the injectors 3 in actual production may be three or four, and the injectors 3 are arranged in parallel.

As shown in fig. 3, the vacuum pump further comprises a control structure 4 for controlling the number of the opening of the injectors 3 according to the pressure at the exhaust port 12 of the pump body 1, wherein the control structure 4 comprises a sensor 41 for detecting the pressure at the exhaust port 12 of the pump body 1 and a controller for controlling the number of the opening of the injectors 3, the controller is electrically connected with the sensor 41, and the sensor 41 is provided with a detection head 411. The ventilation housing 2 includes a partition portion 23, and the partition portion 23 partitions an inner cavity of the ventilation housing 2 into an adsorption cavity 21 into which gas enters and an exhaust cavity 22 communicating with the outside. The detection head 411 is located in the adsorption chamber 21, the ejector 3 is mounted on the partition 23, and the ejector 3 communicates the exhaust chamber 22 with the adsorption chamber 21.

As shown in fig. 3, the adsorption chamber 21 has an inlet section 211 into which gas enters, the injectors 3 each have a suction port 31, the suction ports 31 are provided in the direction of the inlet section 211, the adsorption chamber 21 is tapered, and the cross-sectional area of the adsorption chamber 21 gradually increases from the inlet section 211.

The partition 23 is provided with a relief valve 5 through which gas in the adsorption chamber 21 can flow to the exhaust chamber 22. The exhaust chamber 22 has an outlet section 221, and the caliber of the outlet section 221 is larger than that of the inlet section 211.

The present aeration shell 2 is installed on an existing vacuum pump. When the vacuum pump works, the exhaust of the vacuum pump enters the adsorption cavity 21, the detection head 411 detects the pressure of the gas entering the ejector 3, the controller controls the opening number of the ejector 3, the ejector 3 enables the exhaust volume of the vacuum pump to be matched with the suction volume of the ejector 3, if the air pressure in the adsorption cavity 21 is too high, the overflow valve 5 can be automatically opened, the gas in the adsorption cavity 21 is enabled to flow to the exhaust cavity 22 in an accelerated mode, the air pressure in the adsorption cavity 21 is enabled to be constant, the negative pressure state of the exhaust port 12 of the vacuum pump is maintained, and therefore the energy consumption of the vacuum pump is improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms pump body 1, intake port 11, exhaust port 12, breather housing 2, suction chamber 21, inlet section 211, exhaust chamber 22, outlet section 221, partition 23, injector 3, intake port 31, control structure 4, sensor 41, sensing head 411, relief valve 5, etc., are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (8)

1. The utility model provides an energy-conserving high-efficient low noise screw vacuum pump, is including pump body (1) that has air inlet (11) and gas vent (12), its characterized in that, the outside of the pump body (1) is equipped with ventilate shell (2), ventilate shell (2) have absorption chamber (21) of intercommunication gas vent (12), be equipped with on ventilate shell (2) and be used for adsorbing gas outgoing's sprayer (3) in chamber (21), the quantity of sprayer (3) is two at least and all parallelly connected the setting, and the vacuum pump still includes control structure (4) according to pump body (1) gas vent (12) pressure control sprayer (3) opening quantity.

2. Energy-saving high-efficiency low-noise screw vacuum pump according to claim 1, characterized in that the control structure (4) comprises a sensor (41) for detecting the pressure of the exhaust port (12) of the pump body (1) and a controller for controlling the number of opening of the injectors (3), the controller being electrically connected to the sensor (41).

3. Energy-saving high-efficiency low-noise screw vacuum pump according to claim 2, characterized in that the sensor (41) has a detection head (411), the detection head (411) being located inside the adsorption chamber (21).

4. Energy-saving efficient low-noise screw vacuum pump according to any of claims 1 to 3, characterized in that the suction chamber (21) has an inlet section (211) for the gas to enter, the injectors (3) each have a suction port (31) and the suction ports (31) are arranged in the direction of the inlet section (211).

5. The screw vacuum pump according to claim 4, characterized in that the adsorption chamber (21) is tapered, and the cross-sectional area of the adsorption chamber (21) is gradually increased from the inlet section (211).

6. The screw vacuum pump according to claim 4, wherein the aeration shell (2) comprises a partition (23) and the partition (23) partitions the interior of the aeration shell (2) into an exhaust chamber (22) communicating with the outside and the adsorption chamber (21), and the ejector (3) is mounted on the partition (23) and the ejector (3) communicates with the exhaust chamber (22) and the adsorption chamber (21).

7. The screw vacuum pump according to claim 6, wherein the partition (23) is provided with a relief valve (5) through which gas in the adsorption chamber (21) can flow to the exhaust chamber (22).

8. The screw vacuum pump according to claim 6, characterized in that the exhaust chamber (22) has an outlet section (221), the outlet section (221) having a larger caliber than the inlet section (211).

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