High-efficiency compact type high-pressure-discharge liquid ring compressor
By adding a third bearing and improving the connection method in the two-stage liquid ring compressor, the problems of unstable connection, large bearing span, and high sealing difficulty were solved, resulting in a larger pumping capacity and more efficient gas flow, thus improving the stability and efficiency of the compressor.
Patent Information
- Application Number
- CN202520723754.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-16
AI Technical Summary
Existing two-stage liquid ring compressors suffer from problems such as unstable connections, large bearing spans, high sealing difficulty, and small gas flow area, resulting in low pumping capacity and low efficiency.
A third bearing is added between the first-stage rear distribution plate and the second-stage front distribution plate. A second air inlet and a second exhaust port are also added. Rolling or sliding bearings are used to replace the mechanical seal, and the connection method is improved to reduce the span.
It improves the stability of the connection, increases the gas flow area and pumping capacity, reduces leakage points and sealing costs, and improves the efficiency of the compressor.
Smart Images
Figure CN223938253U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of compressor technology, and in particular to a high-efficiency, compact, high-discharge-pressure liquid ring compressor. Background Technology
[0002] A two-stage liquid ring compressor is a compressor with two impellers connected in series on a single shaft. When it is working, the gas is drawn in from the intake port of the first-stage impeller, compressed for the first time, and then discharged to the intake port of the second-stage impeller. After being compressed again, the gas is discharged from the exhaust port of the second-stage impeller. It can achieve a higher compression ratio than a single-stage liquid ring compressor.
[0003] Existing two-stage liquid ring compressors have the following problems:
[0004] 1. The tie rod of the two-stage compressor needs to connect two pump bodies and four distribution plates, resulting in a large span of the connecting tie rod, which is not conducive to the stability of the compressor body connection.
[0005] 2. Because the two impellers are coaxially connected, the machine body has a large span. Usually, only the front and rear bearings are installed for support. In order to avoid the span between the two bearings being too large, the length of the impeller must be designed to be very short. This will result in the effective volume of the compressor impeller being too small, and the overall pumping capacity of the machine cannot be very large.
[0006] 3. The bearings at both ends are located outside the pump cavity, so a mechanical seal needs to be installed at each end to prevent gas leakage. The sealing is difficult and costly, and it also increases the shaft span, which is not conducive to the stability of the compressor.
[0007] 4. Typically, there is only one air inlet and one exhaust outlet. The gas can only flow from the front cover, the first stage impeller, the second stage impeller, and finally to the rear cover. It is a single-channel flow with a small flow area, resulting in high exhaust resistance and low compressor efficiency. Summary of the Invention
[0008] To overcome the shortcomings of the prior art, this utility model proposes a high-efficiency, compact, high-discharge-pressure liquid ring compressor, which not only increases the pumping capacity and eliminates the need for a mechanical seal, but also improves the stability of the connection and the efficiency of the compressor. The technical problem to be solved by this utility model is achieved through the following technical solution:
[0009] A high-efficiency, compact, high-discharge-pressure liquid ring compressor includes a first pump body and a second pump body. A first impeller is disposed within the first pump body, and a second impeller is disposed within the second pump body. The first pump body is fixedly connected to a first front distribution plate and a first rear distribution plate at both ends, respectively. The second pump body is fixedly connected to a second front distribution plate and a second rear distribution plate at both ends, respectively. The front end of the first front distribution plate is fixedly connected to a front side cover, and the rear end of the second rear distribution plate is fixedly connected to a rear side cover. The rear side cover is fixedly connected to a rear bearing housing. A first bearing is disposed between the rear bearing housing and the pump shaft. A mechanical seal is disposed between the rear side cover and the pump shaft. A first air inlet is disposed on the front side cover, and a first exhaust outlet is disposed on the rear side cover. A second bearing is disposed between the front side cover and the pump shaft. A front sealing cover is disposed at the front end of the front side cover and is fixedly connected to the front side cover. A third bearing is disposed between the first rear distribution plate and the second front distribution plate, and the third bearing is sleeved on the pump shaft.
[0010] Furthermore, a second exhaust port is provided on the front cover and a second air inlet is provided on the rear cover, with the second exhaust port and the second air inlet connected by a connecting pipe.
[0011] Furthermore, the front cover is fixedly connected to the first pump body by the first bolt.
[0012] Furthermore, the rear cover is fixedly connected to the second pump body by a second bolt.
[0013] Specifically, the first pump body and the second pump body are fixedly connected by double-ended studs.
[0014] Specifically, a distribution plate sleeve is provided between the first rear distribution plate and the second front distribution plate, and a cavity is formed between the first rear distribution plate, the second front distribution plate and the distribution plate sleeve.
[0015] Specifically, a first recessed stop is provided in the middle of the first rear distribution plate, a second recessed stop is provided in the middle of the second front distribution plate, and a third bearing is provided between the first recessed stop and the second recessed stop.
[0016] Ideally, a bushing should be installed between the third bearing and the pump shaft.
[0017] Better yet, the third bearing consists of an inner sleeve and an outer sleeve.
[0018] Ideally, the first bearing is a rolling bearing or a sliding bearing, while the second and third bearings are both sliding bearings.
[0019] This invention adds a third bearing between the first-stage rear distribution plate and the second-stage front distribution plate to improve the support force in the middle of the shaft. This allows the first-stage impeller to be made longer, enabling the compressor to draw in more gas and increase the pumping volume. The second bearing of this invention is installed in the shaft hole of the front cover, so the shaft does not need to extend out of the side cover. This not only reduces the leakage points of the compressor, but also eliminates the need for a mechanical seal, reducing sealing costs.
[0020] The connection method of this utility model can greatly reduce the span of the connecting parts and improve the stability of the connection; and the addition of a second exhaust port and a second air inlet that are interconnected can increase the flow area of the first stage compressed gas, allowing the gas to enter the second stage compression chamber in two separate paths, which can increase the pumping capacity of the compressor and improve the efficiency of the compressor. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a cross-sectional view of the present invention;
[0023] Figure 3 This is a schematic diagram of the connection of the third bearing. Detailed Implementation
[0024] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention, as shown below. Figure 1 and Figure 2 As shown, a high-efficiency, compact, high-discharge-pressure liquid ring compressor includes a first pump body 1 and a second pump body 2. A first impeller 3 is disposed within the first pump body 1, and a second impeller 4 is disposed within the second pump body 2. Both ends of the first pump body 1 are fixedly connected to a first front distribution plate 5 and a first rear distribution plate 6, respectively. Both ends of the second pump body 2 are fixedly connected to a second front distribution plate 7 and a second rear distribution plate 8, respectively. The front end of the first front distribution plate 5 is fixedly connected to a front side cover 9, and the rear end of the second rear distribution plate 8 is fixedly connected to a rear side cover 10. The rear side cover 10 is connected to a rear bearing housing 11. A fixed connection is provided, with a first bearing 12 between the rear bearing housing 11 and the pump shaft 14, a mechanical seal 13 between the rear side cover 10 and the pump shaft 14, a first air inlet 9.1 on the front side cover 9, a first exhaust outlet 10.1 on the rear side cover 10, a second bearing 15 between the front side cover 9 and the pump shaft 14, a front sealing cover 16 at the front end of the front side cover 9, the front sealing cover 16 being fixedly connected to the front side cover 9, and a third bearing 17 between the first rear distribution plate 6 and the second front distribution plate 7, the third bearing 17 being sleeved on the pump shaft 14.
[0025] A second exhaust port 9.2 is provided on the front side cover 9, and a second air inlet 10.2 is provided on the rear side cover 10. The second exhaust port 9.2 and the second air inlet 10.2 are connected by a connecting pipe 18. The pump body and the side cover of this utility model are connected by a flange and bolts. The front side cover 9 and the first pump body 1 are fixedly connected by multiple first bolts 19, and the rear side cover 10 and the second pump body 2 are fixedly connected by multiple second bolts 20. The first pump body 1 and the second pump body 2 are fixedly connected by multiple double-ended studs 21.
[0026] Figure 3 This is a schematic diagram of the connection of the third bearing, combined with... Figure 2 and Figure 3 As shown, a distribution plate sleeve 22 is provided between the first rear distribution plate 6 and the second front distribution plate 7, and a cavity 23 is formed between the first rear distribution plate 6, the second front distribution plate 7 and the distribution plate sleeve 22. A first recessed stop 6.1 is provided in the middle of the first rear distribution plate 6, and a second recessed stop 7.1 is provided in the middle of the second front distribution plate 7. A third bearing 17 is provided between the first recessed stop 6.1 and the second recessed stop 7.1. The third bearing 17 is tightly fitted with the two recessed stops to prevent movement. A bushing 24 is provided between the third bearing 17 and the pump shaft 14.
[0027] The third bearing 17 can be divided into an inner sleeve and an outer sleeve. The inner sleeve is made of wear-resistant and corrosion-resistant bearing-specific material, while the outer sleeve is made of metal material and serves to protect the inner sleeve. The first bearing 12 is a rolling bearing or sliding bearing that can simultaneously withstand axial and radial forces. The second bearing 15 and the third bearing 17 are both water-lubricated sliding bearings. The second bearing 15 is enclosed in the pump cavity, making the non-drive operation completely closed, eliminating the need for a mechanical seal.
[0028] Before the compressor starts operating, water is supplied to it. Once a certain water level is reached, the motor is started. After a stable liquid ring forms inside the compressor, it can operate normally. During operation, gas enters through the inlet of the front cover 9, passes through the first front distribution plate 5, and enters the first-stage compression chamber. After compression in the first stage, the gas is divided into two streams. One stream passes through the first rear distribution plate 6 into the cavity between the two stages, and then directly enters the second-stage compression chamber through the second front distribution plate 7. The other stream passes through the second exhaust port 9.2 of the front cover 9, through the connecting pipe 18 into the second inlet 10.2 of the rear cover 10, and then through the second rear distribution plate 8 into the second-stage compression chamber. The two streams of gas converge in the second-stage compression chamber, are compressed, and then exit through the second rear distribution plate 8 and the first exhaust port 10.1 of the rear cover 10. Throughout the process, the gas flows in two streams, resulting in a significantly larger flow area compared to a single-channel system. This reduces exhaust resistance, thus improving the overall pump efficiency and increasing the gas flow rate.
[0029] In summary, this invention adds a third bearing between the first-stage rear distribution plate and the second-stage front distribution plate to improve the support force in the middle of the shaft. This allows the first-stage impeller to be made longer, enabling the compressor to draw in more gas and increase the pumping volume. The second bearing of this invention is installed in the shaft hole of the front cover, so the shaft does not need to extend out of the side cover. This not only reduces the leakage points of the compressor but also eliminates the need for a mechanical seal, reducing sealing costs.
[0030] The connection method of this utility model can greatly reduce the span of the connecting parts and improve the stability of the connection; and the addition of a second exhaust port and a second air inlet that are interconnected can increase the flow area of the first stage compressed gas, allowing the gas to enter the second stage compression chamber in two separate paths, which can increase the pumping capacity of the compressor and improve the efficiency of the compressor.
Claims
1. A high-efficiency, compact, high-discharge-pressure liquid ring compressor, comprising a first pump body and a second pump body, a first impeller disposed within the first pump body, a second impeller disposed within the second pump body, a first front distribution plate and a first rear distribution plate fixedly connected to both ends of the first pump body, and a second front distribution plate and a second rear distribution plate fixedly connected to both ends of the second pump body, the front end of the first front distribution plate fixedly connected to a front side cover, the rear end of the second rear distribution plate fixedly connected to a rear side cover, the rear side cover fixedly connected to a rear bearing housing, a first bearing disposed between the rear bearing housing and a pump shaft, a mechanical seal disposed between the rear side cover and the pump shaft, a first air inlet disposed on the front side cover, and a first exhaust outlet disposed on the rear side cover, characterized in that, A second bearing is provided between the front cover and the pump shaft. A front sealing cover is provided at the front end of the front cover and is fixedly connected to the front cover. A third bearing is provided between the first rear distribution plate and the second front distribution plate and is sleeved on the pump shaft.
2. The high-efficiency, compact, high-discharge-pressure liquid ring compressor according to claim 1, characterized in that, A second exhaust port is provided on the front cover, and a second air inlet is provided on the rear cover. The second exhaust port and the second air inlet are connected by a connecting pipe.
3. The high-efficiency, compact, high-discharge-pressure liquid ring compressor according to claim 1, characterized in that, The front cover is fixedly connected to the first pump body by the first bolt.
4. The high-efficiency, compact, high-discharge-pressure liquid ring compressor according to claim 1, characterized in that, The rear cover is fixedly connected to the second pump body by the second bolt.
5. The high-efficiency, compact, high-discharge-pressure liquid ring compressor according to claim 1, characterized in that, The first pump body and the second pump body are fixedly connected by double-ended studs.
6. The high-efficiency compact high-discharge-pressure liquid ring compressor according to claim 1, characterized in that, A distribution plate sleeve is provided between the first rear distribution plate and the second front distribution plate, and a cavity is formed between the first rear distribution plate, the second front distribution plate and the distribution plate sleeve.
7. The high-efficiency compact high-discharge-pressure liquid ring compressor according to claim 1, characterized in that, A first recessed stop is provided in the middle of the first rear distribution plate, and a second recessed stop is provided in the middle of the second front distribution plate. The third bearing is disposed between the first recessed stop and the second recessed stop.
8. The high-efficiency, compact, high-discharge-pressure liquid ring compressor according to claim 7, characterized in that, A bushing is provided between the third bearing and the pump shaft.
9. The high-efficiency, compact, high-discharge-pressure liquid ring compressor according to claim 7, characterized in that, The third bearing includes an inner sleeve and an outer sleeve.
10. The high-efficiency, compact, high-discharge-pressure liquid ring compressor according to claim 1, characterized in that, The first bearing is a rolling bearing or a sliding bearing, and the second and third bearings are both sliding bearings.