Liquid ring compressor with lengthened hub
By setting the extended hub and shaft shoulder in the liquid ring compressor to increase the contact area between the impeller and shaft, the problem of easy dislocation of the impeller and shaft is solved, the positioning reliability is improved, and the shaft is protected from corrosion and the equipment life is extended.
Patent Information
- Application Number
- CN202422224217.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The contact area between the impeller and the shaft of the liquid ring compressor is insufficient, which leads to relative dislocation of the impeller and the shaft, affecting the reliability of axial positioning, and when the corrosive medium is extracted, the corrosive medium will damage the shaft.
A liquid ring compressor with an extended hub is designed. By providing an extended hub and axle shoulder on the impeller, the thermal contact area of the impeller and the shaft is increased, and a fully covered structure is formed through the shaft sleeve to avoid damage to the impeller and shaft dislocation and corrosive media.
It improves the adhesion between the impeller and the shaft, avoids relative misalignment during the impeller operation, enhances the axial positioning reliability, and protects the shaft from damage from corrosive media, extending the service life of the compressor.
Smart Images
Figure CN223152269U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of liquid variable volume machinery, and particularly relates to a liquid ring compressor with an extended hub. Background Art
[0002] A liquid ring compressor is a driven machine that relies on the input mechanical energy to increase the gas pressure, and is widely used in systems such as metallurgy, petroleum, and chemical industry that require relatively high gas pressure. The principle of the liquid ring compressor is that the impeller is eccentrically installed in the pump body, and the working liquid enters the compressor through the liquid inlet channel. A liquid ring eccentric to the impeller is formed by the rotation of the impeller. When the impeller rotates, the gas is sucked in through the suction port and compressed, and finally the gas-liquid mixture is discharged through the exhaust port.
[0003] The core structure of the liquid ring compressor is the rotor component composed of the impeller and the shaft. Due to the particularity of the liquid ring compressor, the aspect ratio of the impeller is small, resulting in a short axial length of the impeller and insufficient contact area between the impeller and the shaft. When a relatively large power motor outputs torque, it is easy to cause the torque not to be transmitted, resulting in relative misalignment between the impeller and the shaft. In addition, the impeller is usually positioned on the impeller end face. After the shaft is inserted into the heated impeller, the impeller will shrink unilaterally towards the impeller end face, resulting in the relative position movement between the impeller and the shaft, affecting the reliability of the axial positioning. At the same time, when the liquid ring compressor extracts corrosive media, the corrosive media will damage the shaft. Summary of the Utility Model
[0004] According to the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a liquid ring compressor with an extended hub, which can improve the adhesion between the impeller and the shaft by setting the extended hub, avoid relative misalignment between the impeller and the shaft during the operation of the impeller, and at the same time increase the reliability of the axial positioning during the installation of the impeller, and avoid damage to the shaft caused by corrosive media.
[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:
[0006] The liquid ring compressor with an extended hub described in the utility model includes a pump body and an impeller. The impeller is eccentrically arranged inside the pump body through a shaft. The impeller includes an extended hub and a plurality of blades. The blades are fixedly arranged on the extended hub. The length of the extended hub along the axial direction is greater than the length of the blades along the axial direction. A shaft shoulder is sleeved on the outer surface of the shaft, and the extended hub is sleeved on the shaft shoulder. A shaft sleeve is cooperatively arranged on the outer surface of the shaft.
[0007] Among them:
[0008] Front and rear pump covers are respectively arranged at both ends of the pump body. A gas inlet is arranged at the top of the front pump cover, and a working liquid inlet is arranged at one side of the lower part of the front pump cover. A discharge port is arranged at the top of the rear pump cover.
[0009] A front disc is arranged between the front pump cover and the impeller, and a rear disc is arranged between the rear pump cover and the impeller. The front pump cover is connected to the front bearing bracket, and the rear pump cover is connected to the rear bearing bracket.
[0010] An air inlet and a liquid inlet channel are arranged on the front disc, and an exhaust port is arranged on the rear disc.
[0011] Both the front bearing bracket and the rear bearing bracket are sleeved on the shaft.
[0012] The shaft sleeve includes a front shaft sleeve and a rear shaft sleeve. The front shaft sleeve is located between the front pump cover and the shaft, and the rear shaft sleeve is located between the rear pump cover and the shaft. The front shaft sleeve, the shaft shoulder, and the rear shaft sleeve are connected in sequence.
[0013] A mechanical seal is arranged between the front pump cover and the front shaft sleeve, and a mechanical seal is arranged between the rear pump cover and the rear shaft sleeve.
[0014] One end of the front shaft sleeve close to the impeller is inserted between the extended hub and the shaft shoulder, and an O-ring is arranged between the front shaft sleeve and the extended hub.
[0015] One end of the rear shaft sleeve close to the impeller is inserted between the extended hub and the shaft shoulder, and an O-ring is arranged between the rear shaft sleeve and the extended hub.
[0016] The diameter of the shaft shoulder at the end close to the front shaft sleeve is larger than the diameter of the shaft shoulder at the end close to the rear shaft sleeve.
[0017] The beneficial effects of the present utility model are as follows:
[0018] By arranging the extended hub, the hot-fitting contact area between the impeller hub and the shaft is increased, thereby improving the adhesion between the impeller and the shaft and avoiding relative misalignment between the impeller and the shaft during the operation of the impeller; an axial shoulder is arranged inside the extended hub, and the impeller is positioned by the axial shoulder. When the hot-fitting assembly of the impeller and the shaft is completed, the impeller shrinks thermally from both ends of the impeller towards the middle, avoiding relative position movement between the impeller and the shaft caused by unidirectional shrinkage and improving the reliability of axial positioning during the installation of the impeller. By arranging a shaft sleeve that can be inserted into the inner side of the hub, a fully enclosed structure of the shaft is formed, avoiding damage to the shaft caused by corrosive media when the liquid ring compressor extracts corrosive media and extending the service life of the compressor. Description of the Drawings
[0019] Figure 1 is a structural schematic diagram of the present utility model;
[0020] Figure 2 is a structural schematic diagram of the impeller, shaft, shaft sleeve, front disc, and rear disc in the present utility model;
[0021] Figure 3 is a structural schematic diagram of the impeller in the present utility model;
[0022] Figure 4 is a structural schematic diagram of the front disc in the present utility model;
[0023] Figure 5 It is a schematic structural diagram of the rear disc in the present utility model;
[0024] In the figure: 1. Pump body; 2. Impeller; 201. Extended hub; 202. Blades; 3. Shaft; 301. Shaft shoulder; 4. Front pump cover; 5. Rear pump cover; 6. Gas inlet; 7. Working fluid inlet; 8. Discharge port; 9. Front disc; 901. Air inlet; 902. Liquid inlet channel; 10. Rear disc; 1001. Exhaust port; 11. Front bearing bracket; 12. Sleeve; 1201. Front sleeve; 1202. Rear sleeve; 13. Mechanical seal; 14. Rear bearing bracket. Specific embodiments
[0025] The following further describes the embodiments of the present utility model with reference to the accompanying drawings.
[0026] Embodiment 1
[0027] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 shown, the present utility model includes a pump body 1 and an impeller 2. The impeller 2 is eccentrically arranged inside the pump body 1 through a shaft 3. The impeller 2 includes an extended hub 201 and a plurality of blades 202. The blades 202 are fixedly arranged on the extended hub 201. The axial length of the extended hub 201 is greater than the axial length of the blades 202. A shaft shoulder 301 is sleeved on the outer surface of the shaft 3, and the extended hub 201 is sleeved on the shaft shoulder 301. A sleeve 12 is cooperatively arranged on the outer surface of the shaft 3.
[0028] By setting the extended hub 201, the hot-fitting contact area between the hub of the impeller 2 and the shaft 3 is increased, thereby improving the adhesion between the impeller 2 and the shaft 3, and avoiding relative misalignment between the impeller 2 and the shaft 3 during the operation of the impeller 2. The shaft shoulder 301 is cooperatively arranged inside the extended hub 201, and the impeller 2 is positioned by the shaft shoulder 301. When the hot-fitting assembly of the impeller 2 and the shaft 3 is completed, the impeller 2 shrinks thermally from both ends of the impeller 2 towards the middle, avoiding relative position movement of the impeller 2 and the shaft 3 caused by unidirectional shrinkage, and improving the reliability of axial positioning during the installation of the impeller 2.
[0029] The front pump cover 4 and the rear pump cover 5 are respectively arranged at both ends of the pump body 1. The gas inlet 6 is arranged at the top of the front pump cover 4, and the working fluid inlet 7 is arranged at one side of the lower part of the front pump cover 4. The discharge port 8 is arranged at the top of the rear pump cover 5.
[0030] A front disc 9 is arranged between the front pump cover 4 and the impeller 2, a rear disc 10 is arranged between the rear pump cover 5 and the impeller 2, the front pump cover 4 is connected to the front bearing bracket 11, and the rear pump cover 5 is connected to the rear bearing bracket 14.
[0031] An air inlet 901 and a liquid inlet passage 902 are provided on the front disk 9, and an exhaust port 1001 is provided on the rear disk 10.
[0032] Both the front bearing bracket 11 and the rear bearing bracket 14 are sleeved on the shaft 3.
[0033] The shaft sleeve 12 includes a front shaft sleeve 1201 and a rear shaft sleeve 1202. The front shaft sleeve 1201 is located between the front pump cover 4 and the shaft 3, and the rear shaft sleeve 1202 is located between the rear pump cover 5 and the shaft 3. The front shaft sleeve 1201, the shaft shoulder 301 and the rear shaft sleeve 1202 are connected in sequence.
[0034] A mechanical seal 13 is provided between the front pump cover 4 and the front shaft sleeve 1201, and a mechanical seal 13 is provided between the rear pump cover 5 and the rear shaft sleeve 1202.
[0035] One end of the front shaft sleeve 1201 close to the impeller 2 is inserted between the extended hub 201 and the shaft shoulder 301, and an O-ring is provided between the front shaft sleeve 1201 and the extended hub 201.
[0036] One end of the rear shaft sleeve 1202 close to the impeller 2 is inserted between the extended hub 201 and the shaft shoulder 301, and an O-ring is provided between the rear shaft sleeve 1202 and the extended hub 201. This can prevent the corrosive medium from corroding the surface of the shaft 3 when the liquid ring compressor extracts the corrosive medium.
[0037] The diameter of one end of the shaft shoulder 301 close to the front shaft sleeve 1201 is larger than the diameter of one end of the shaft shoulder 301 close to the rear shaft sleeve 1202.
[0038] Working principle and process:
[0039] The working liquid is introduced into the liquid ring compressor through the working liquid inlet 7. The working liquid enters the cavity formed by the impeller 2, the front disk 9, the rear disk 10 and the pump body 1 through the liquid inlet passage 902 on the front disk 9. Start the impeller 2 to rotate. When the impeller 2 rotates to a certain speed, due to the action of centrifugal force, the working liquid forms a liquid ring eccentric to the impeller 2. During the rotation of the impeller 2, the gas is inhaled into the cavity through the gas inlet 6 and the air inlet 901 on the front disk 9 and compressed. Finally, the gas-liquid mixture composed of the gas and the working liquid leaves the cavity through the exhaust port 1001 on the rear disk 10 and is discharged through the discharge port 8.
Claims
1. A liquid ring compressor with an extended hub, comprising a pump body (1) and an impeller (2), the impeller (2) being eccentrically arranged inside the pump body (1) through a shaft (3), characterized in that, The impeller (2) includes an extended hub (201) and a plurality of blades (202). The blades (202) are fixedly arranged on the extended hub (201). The axial length of the extended hub (201) is greater than the axial length of the blades (202). A shaft shoulder (301) is sleeved on the outer surface of the shaft (3). The extended hub (201) is sleeved on the shaft shoulder (301). A shaft sleeve (12) is arranged on the outer surface of the shaft (3) in a matching manner.
2. The liquid ring compressor with an extended hub according to claim 1, characterized in that, The front pump cover (4) and the rear pump cover (5) are respectively arranged at both ends of the pump body (1). A gas inlet (6) is arranged at the top of the front pump cover (4). A working fluid inlet (7) is arranged at one side of the lower part of the front pump cover (4). A discharge port (8) is arranged at the top of the rear pump cover (5).
3. The liquid ring compressor with an extended hub according to claim 2, characterized in that, A front disc (9) is arranged between the front pump cover (4) and the impeller (2). A rear disc (10) is arranged between the rear pump cover (5) and the impeller (2). The front pump cover (4) is connected to the front bearing bracket (11). The rear pump cover (5) is connected to the rear bearing bracket (14).
4. The liquid ring compressor with an extended hub according to claim 3, characterized in that, An air inlet (901) and a liquid inlet channel (902) are arranged on the front disc (9). An exhaust port (1001) is arranged on the rear disc (10).
5. The liquid ring compressor with an extended hub according to claim 3, characterized in that, Both the front bearing bracket (11) and the rear bearing bracket (14) are sleeved on the shaft (3).
6. The liquid ring compressor with an extended hub according to claim 3, characterized in that, The shaft sleeve (12) includes a front shaft sleeve (1201) and a rear shaft sleeve (1202). The front shaft sleeve (1201) is located between the front pump cover (4) and the shaft (3). The rear shaft sleeve (1202) is located between the rear pump cover (5) and the shaft (3). The front shaft sleeve (1201), the shaft shoulder (301) and the rear shaft sleeve (1202) are connected in sequence.
7. The liquid ring compressor with an extended hub according to claim 6, characterized in that, A mechanical seal (13) is arranged between the front pump cover (4) and the front shaft sleeve (1201). A mechanical seal (13) is arranged between the rear pump cover (5) and the rear shaft sleeve (1202).
8. The liquid ring compressor with an extended hub according to claim 6, characterized in that, One end of the front shaft sleeve (1201) close to the impeller (2) is inserted between the extended hub (201) and the shaft shoulder (301). An O-ring is arranged between the front shaft sleeve (1201) and the extended hub (201).
9. The liquid ring compressor with an extended hub according to claim 6, wherein, One end of the rear shaft sleeve (1202) close to the impeller (2) is inserted between the extended hub (201) and the shaft shoulder (301). An O-ring is arranged between the rear shaft sleeve (1202) and the extended hub (201).
10. The liquid ring compressor with an extended hub according to claim 6, characterized in that, The diameter of one end of the shaft shoulder (301) close to the front shaft sleeve (1201) is greater than the diameter of one end of the shaft shoulder (301) close to the rear shaft sleeve (1202).