Integrated cantilever type liquid ring vacuum pump

Abstract

The utility model belongs to the technical field of liquid ring vacuum pumps, and particularly relates to an integrated cantilever type liquid ring vacuum pump which comprises an integrated pump body, an end cover, a motor, a mechanical seal and an impeller, the integrated pump body is fixedly connected with the end cover, the end cover is fixedly connected with the motor, and the impeller and the mechanical seal are installed on a motor shaft extension. The impeller and the mechanical seal are wrapped in the integrated pump body, and the impeller and the motor shaft extension are in transmission through a flat key or an expansion sleeve. According to the utility model, the integral sealing performance of a product is effectively improved, the installation time is shortened, the integral structural strength of the pump body is improved, the reliability of the product is improved, the weight of the whole pump is reduced by 20-30%, and the production, transportation and installation costs are effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid ring vacuum pumps, in particular to an integrated cantilever liquid ring vacuum pump. Background Art

[0002] The existing Roots cantilever liquid ring vacuum pump is usually composed of several main parts: side cover 20, distribution plate 21, pump body 22, motor 23, mechanical seal 24 and impeller 25. Figure 1 It is a structural diagram of the prior art, such as Figure 1 As shown, the existing problems are: there are too many parts, the processing and installation work is difficult and the working hours are long, and the production and management costs are high; there are many fitting points and sealing surfaces, which require high processing accuracy of parts and are prone to leakage. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention proposes an integrated cantilever liquid ring vacuum pump, which effectively improves the overall sealing of the product, reduces the installation time, improves the overall structural strength of the pump body, and improves the reliability of the product. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0004] An integrated cantilever liquid ring vacuum pump includes an integrated pump body, an end cover, a motor, a mechanical seal and an impeller. The integrated pump body is fixedly connected to the end cover, the end cover is fixedly connected to the motor, the impeller and the mechanical seal are installed on the motor shaft, the impeller and the mechanical seal are wrapped in the integrated pump body, and the impeller and the motor shaft are driven by a flat key or an expansion sleeve.

[0005] Furthermore, a drain outlet is provided at the lower end of the front face of the integrated pump body, and the drain outlet is communicated with the working chamber of the integrated pump body.

[0006] Furthermore, an anti-cavitation interface is provided on the side of the integrated pump body, and the anti-cavitation interface is communicated with the exhaust port inside the integrated pump body.

[0007] Specifically, an air inlet, an air outlet, a water return port and a working fluid supply port are provided inside the integrated pump body.

[0008] Specifically, the air inlet is communicated with the working chamber of the integrated pump body and the external air inlet interface.

[0009] Specifically, the exhaust port is communicated with the working chamber of the integrated pump body and the external exhaust interface.

[0010] Specifically, the working fluid supply port is communicated with the working chamber of the integrated pump body and the external working fluid supply interface.

[0011] Preferably, the water return port is connected to the drain port.

[0012] The utility model effectively improves the overall sealing of the product, reduces installation time, improves the overall structural strength of the pump body, improves the reliability of the product, reduces the weight of the entire pump by 20%-30%, and effectively reduces the cost of production, transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the prior art;

[0014] Figure 2 It is a structural diagram of the utility model;

[0015] Figure 3 It is an exploded view of the utility model;

[0016] Figure 4 This is the left side view of the integrated pump body;

[0017] Figure 5 for Figure 4 sectional view of

[0018] Figure 6 This is the internal structure diagram of the integrated pump body. DETAILED DESCRIPTION

[0019] Figure 2 This is a schematic diagram of the structure of the utility model. Figure 3 This is the exploded diagram of the utility model, combined with Figure 2 and Figure 3 As shown, an integrated cantilever liquid ring vacuum pump includes an integrated pump body 1, an end cover 2, a motor 3, a mechanical seal 4 and an impeller 5. The integrated pump body 1 is fixedly connected to the end cover 2, the end cover 2 is fixedly connected to the motor 3, the impeller 5 and the mechanical seal 4 are mounted on the motor shaft, the impeller 5 and the mechanical seal 4 are wrapped in the integrated pump body 1, and the impeller 5 and the motor shaft are driven by a flat key or an expansion sleeve. The integrated pump body 1 of this embodiment is connected to the end cover 2, and the end cover 2 is connected to the motor 3, all of which are connected by tightening bolts and positioning with round stoppers.

[0020] Figure 4 This is the left side view of the integrated pump body. Figure 5 for Figure 4 Cross-sectional view, combined with Figure 4 and Figure 5As shown, a drain outlet 6 is provided at the lower end of the front face of the integrated pump body 1, and a working chamber 7 is provided inside the integrated pump body 1. The drain outlet 6 is connected to the working chamber 7 of the integrated pump body 1. Since there will be no water accumulation in the lower part of the integrated pump body 1, only one drain outlet is required, and the drain outlet 6 is directly connected to the inside of the pump body, and there is no need to separate the drainage chamber with a rib plate through the side cover; the drain outlet 6 only needs to be opened when the machine is shut down, and the drain outlet 6 is closed during normal operation. Part of the working water can flow back to the end face of the impeller through the return water port for reuse, thereby saving working water and enhancing the end face sealing effect.

[0021] An anti-cavitation interface 8 is provided on the side of the integrated pump body 1, and the anti-cavitation interface 8 is communicated with the exhaust port 10 inside the integrated pump body 1. Figure 6 As shown, since the anti-cavitation interface 8 is drilled from the side to the exhaust port 10, the pipe from the side cover end interface to the exhaust port is eliminated, and at the same time, the pipe is avoided from occupying the area of the exhaust port, reducing the exhaust resistance, thereby improving the working efficiency of the liquid ring pump.

[0022] Figure 6 This is the internal structure diagram of the integrated pump body, combined with Figure 3 、 Figure 5 and Figure 6 As shown, an air inlet 9, an exhaust port 10, a return water port 11 and a working fluid supply port 12 are arranged inside the integrated pump body 1, the air inlet 9 is connected with the working chamber 7 of the integrated pump body and the external air inlet interface 13, the exhaust port 10 is connected with the working chamber 7 of the integrated pump body and the external exhaust interface 14, the working fluid supply port 12 is connected with the working chamber 7 of the integrated pump body and the external working fluid supply interface 15, the external air inlet interface 13 and the external exhaust interface 14 are arranged at the upper end of the integrated pump body 1, the external working fluid supply interface 15 is arranged at the front of the integrated pump body 1, the return water port 11 is connected with the drain port 6, and the number of exhaust ports 10 in this embodiment is 8.

[0023] The integrated pump body of the utility model casts the original side cover, distribution plate and pump body into an integrated structure. The sealing surface and matching stop between the side cover and the distribution plate, and the sealing surface and matching stop between the distribution plate and the pump body are eliminated. There is no installation and matching requirement between the side cover, distribution plate and pump body, and the processing is simpler. The integrated pump body structure does not need to consider the installation and sealing fit of several parts, the size of multiple parts can be reduced, and the weight of the entire pump is reduced by 20%-30%.

[0024] In short, the number of main parts of the utility model is reduced, and the mating surfaces and sealing surfaces are also reduced, which can effectively improve the overall sealing of the product and reduce the difficulty of processing parts. At the same time, the reduction in the number of parts can also reduce the installation time and production management costs; after the side cover, distribution plate and pump body are cast into an integrated pump body, the overall structural strength of the pump body is improved, the reliability of the product is improved, and the weight of the entire pump is reduced by 20%-30%, effectively reducing the cost of production, transportation and installation.

Claims

1. An integrated cantilever liquid ring vacuum pump, characterized in that: It includes an integrated pump body, an end cover, a motor, a mechanical seal and an impeller. The integrated pump body is fixedly connected to the end cover, the end cover is fixedly connected to the motor, the impeller and the mechanical seal are installed on the motor shaft, the impeller and the mechanical seal are wrapped in the integrated pump body, and the impeller and the motor shaft are driven by a flat key or an expansion sleeve.

2. The integrated cantilever liquid ring vacuum pump according to claim 1, characterized in that: A drain port is provided at the lower end of the front face of the integrated pump body, and the drain port is communicated with the working chamber of the integrated pump body.

3. The integrated cantilever liquid ring vacuum pump according to claim 1, characterized in that: An anti-cavitation interface is provided on the side of the integrated pump body, and the anti-cavitation interface is communicated with the exhaust port inside the integrated pump body.

4. The integrated cantilever liquid ring vacuum pump according to claim 1, characterized in that: An air inlet, an air outlet, a water return port and a working fluid supply port are arranged inside the integrated pump body.

5. The integrated cantilever liquid ring vacuum pump according to claim 4, characterized in that: The air inlet is communicated with the working chamber of the integrated pump body and the external air inlet interface.

6. The integrated cantilever liquid ring vacuum pump according to claim 4, characterized in that: The exhaust port is communicated with the working chamber of the integrated pump body and the external exhaust interface.

7. The integrated cantilever liquid ring vacuum pump according to claim 4, characterized in that: The working fluid supply port is communicated with the working chamber of the integrated pump body and the external working fluid supply interface.

8. The integrated cantilever liquid ring vacuum pump according to claim 4, wherein: The water return port is communicated with the drain port.

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