Centrifugal compressor for toluene-to-benzene device
By designing a simple and compact toluene benzene-making centrifugal compressor, the rear benzene-making impeller and casting partition set with diameters of 450mm, 900mm or 400mm, the problems of complex structure and oil pollution risk in the chemical process are solved, and stable operation is achieved and low maintenance oil-free compression effect.
Patent Information
- Application Number
- CN202420827430.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-19
AI Technical Summary
The existing centrifugal compressors have problems such as complex structure, many moving parts, high maintenance costs and oil pollution risks in chemical processes, especially in the toluene benzene making device, which is difficult to achieve oil-free compression.
A centrifugal compressor for toluene benzene making device including a casing group, a rotor group, a bearing group and a shaft end dry air seal is designed. It adopts a simple and compact structure and uses a rear bending closure with a diameter of 450mm, 900mm or 400mm. The type of impeller and partition set uses QT400-18 or ZG230-450 castings, which fix the impeller and spacer by hot installation and welding to ensure sealing and stability.
The centrifugal compressor has a simple structure, few moving parts, stable operation, low operating costs and oil-free compression, reducing the demand for spare parts and maintenance costs, and is suitable for oil-free compression requirements in chemical processes.
Smart Images
Figure CN222162956U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of centrifugal compressors, in particular to a centrifugal compressor used in a toluene-to-benzene device. Background Art
[0002] Centrifugal compressors are devices that compress gas to the pressure required by process equipment. Their role and importance cannot be ignored in industrial production and life. The main function of a centrifugal compressor is to compress gas and then transmit the compressed gas to the required location. Centrifugal compressors are widely used in refrigeration, air compression, wind power generation, industrial gas transportation, petrochemicals and other fields. Utility Model Content
[0003] In view of the deficiencies in the prior art, the utility model provides a centrifugal compressor for a toluene-to-benzene device, which solves the technical problems raised in the above-mentioned background technology.
[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a centrifugal compressor for a toluene-to-benzene device, comprising a casing group, a rotor group, a bearing group and a shaft end dry gas seal, the casing group comprising a cylinder, a partition group, a sealing group, a first end cover, a second end cover, an air inlet and an air outlet, the rotor group comprising a main shaft, an impeller, a spacer, a balancing disk, a lock nut and a thrust disk, the partition group is divided into upper and lower halves of a horizontally split structural partition, a pair of the partitions are connected by a pull rod bolt, the air inlet and the air outlet are welded and fixedly installed on the upper part of the cylinder, the second end cover is fixedly installed on the cylinder by bolts, and a plurality of the impellers are installed on the cylinder by heat-fitting. On the main shaft, the spacer is installed between several impellers, the rear of the last-stage impeller is installed on the balancing disk by heat-fitting, the impeller, the spacer and the balancing disk are fixedly installed on the main shaft by the lock nuts at both ends, the thrust disk is fixedly installed on the main shaft by the thrust lock nut, the seal group is installed in the partition group, the rotor group is installed in the partition group, the seal group and the partition group are installed in the casing, the first end cover is fixedly installed on the cylinder by bolts, the shaft end dry gas seal is installed in the first end cover and the second end cover cavity, and the bearing group is installed in the positioning groove of the first end cover and the second end cover.
[0005] Preferably, the impeller is a backward curved closed impeller with a diameter of 450 mm, 900 mm or 400 mm.
[0006] Preferably, the partition plate group is made of QT400-18 casting or ZG230-450 casting.
[0007] Beneficial Effects
[0008] The utility model provides a centrifugal compressor for a toluene-to-benzene device, which has the following beneficial effects:
[0009] 1. The centrifugal compressor has a simple and compact structure, few moving parts, reliable operation, durability and low operating costs.
[0010] 2. Stable operation, reliable operation, high operating rate, few friction parts, so less spare parts are needed, less maintenance cost and less personnel.
[0011] 3. In the chemical process, centrifugal compressors can achieve an absolutely oil-free compression process for chemical media. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is the general assembly diagram of a centrifugal compressor used in a toluene to benzene device described in the utility model.
[0013] Figure 2 This is a structural diagram of a casing assembly of a centrifugal compressor used in a toluene to benzene device described in the utility model.
[0014] Figure 3 This is a structural diagram of the rotor group of a centrifugal compressor used in a toluene to benzene device described in the utility model.
[0015] In the figure: 1, casing assembly; 2, rotor assembly; 3, bearing assembly; 4, shaft end dry gas seal; 10, cylinder; 11, partition assembly; 12, sealing assembly; 13, first end cover; 14, second end cover; 15, air inlet pipe; 16, air outlet pipe; 20, main shaft; 21, impeller; 22, spacer; 23, balance plate; 24, lock nut; 25, thrust plate. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0017] See also Figure 1-3The utility model provides a technical solution of a centrifugal compressor for a toluene-to-benzene device: a centrifugal compressor for a toluene-to-benzene device, comprising a casing group 1, a rotor group 2, a bearing group 3 and a shaft end dry gas seal 4, the casing group 1 comprises a cylinder 10, a partition group 11, a sealing group 12, a first end cover 13, a second end cover 14, an air inlet 15 and an air outlet 16, the rotor group 2 comprises a main shaft 20, an impeller 21, a spacer 22, a balance disc 23, a lock nut 24 and a thrust disc 25, the partition group 11 is divided into upper and lower halves of a horizontally split structural partition, a pair of partitions are connected by a tie rod bolt, the air inlet 15 and the air outlet 16 are welded and fixedly installed on the upper part of the cylinder 10, the second end cover 14 is fixedly installed on the cylinder 10 by bolts, and a plurality of impellers are connected. The impeller 21 is installed on the main shaft 20 by heat-fitting, and spacers 22 are installed between several impellers 21. The rear of the last-stage impeller 21 is installed on the balancing disk 23 by heat-fitting. The impeller 21, spacers 22 and balancing disk 23 are fixedly installed on the main shaft 20 by lock nuts 24 at both ends. The thrust disk 25 is fixedly installed on the main shaft 20 by thrust lock nuts. The sealing group 12 is installed in the partition group 11, the rotor group 2 is installed in the partition group 11, the sealing group 12 and the partition group 11 are installed in the casing, the first end cover 13 is fixedly installed on the cylinder 10 by bolts, the shaft end dry gas seal 4 is installed in the cavity of the first end cover 13 and the second end cover 14, and the bearing group 3 is installed in the positioning grooves of the first end cover 13 and the second end cover 14.
[0018] Furthermore, the impeller 21 is a backward curved closed impeller with a diameter of 450 mm, 900 mm or 400 mm.
[0019] Furthermore, the partition plate group 11 is made of QT400-18 casting or ZG230-450 casting.
[0020] Example 1: Vertically split five-stage centrifugal compressor.
[0021] like Figure 1 , 2As shown in Figure 3, the casing group 1, rotor group 2, bearing group 3, shaft end dry gas seal 4 and other components are processed respectively. First, five 450mm diameter backward curved and closed impellers are processed with ASTM A705 age-hardened stainless steel; the main shaft is turned with 40NiCrMo7 alloy steel forgings; the partition group 3 is processed with ZG230-450 castings; the cylinder 10 is processed with 20# forgings through welding, turning, drilling, milling and other processes; the interstage, shaft end and mouth ring seals are made of 2A14 forged aluminum alloy; the spacer and lock nut are made of 12Cr13 martensitic stainless steel, and then the impeller, spacer, balance plate, lock nut and thrust plate are installed and fixed on the main shaft to form the rotor group 2. Install the partition assembly with the rotor and seal into the casing; then the rotor assembly 2 is positioned in the casing and the partition assembly through the bearing assembly 3; then the left and right end covers are fixed to the cylinder body by bolts, and the installation of the vertically split five-stage centrifugal compressor is completed.
[0022] Example 2: Vertically split four-stage centrifugal compressor.
[0023] like Figure 1 , 2 As shown in Figure 3, the casing group 1, rotor group 2, bearing group 3, shaft end dry gas seal 4 and other components are processed respectively. First, five backward curved and closed impellers with a diameter of 900 mm are processed with ASTM A705 age-hardened stainless steel; the main shaft is turned with 40NiCrMo7 alloy steel forgings; the partition group 3 is processed with QT400-18 castings; the cylinder 10 is processed with 20# forgings through welding, turning, drilling, milling and other processes; the interstage, shaft end and mouth ring seals are made of 2A14 forged aluminum alloy; the spacer and lock nut are made of 12Cr13 martensitic stainless steel, and then the impeller, spacer, balance plate, lock nut and thrust plate are installed and fixed on the main shaft to form the rotor group 2. Install the partition assembly with the rotor and seal into the casing; then the rotor assembly 2 is positioned in the casing and the partition assembly through the bearing assembly 3; then the left and right end covers are fixed to the cylinder body by bolts, and the installation of the vertically split four-stage centrifugal compressor is completed.
[0024] Example 3: Vertically split seven-stage centrifugal compressor.
[0025] like Figure 1 , 2As shown in Figure 3, the casing group 1, rotor group 2, bearing group 3, shaft end dry gas seal 4 and other components are processed respectively. First, five backward curved and closed impellers with a diameter of 400mm are processed with ASTM A705 age-hardened stainless steel; the main shaft is turned with 40NiCrMo7 alloy steel forgings; the partition group 3 is processed with ZG230-450 castings; the cylinder 10 is processed with 20CrMo# forgings through welding, turning, drilling, milling and other processes; the interstage, shaft end and mouth ring seals are made of 2A14 forged aluminum alloy; the spacer and lock nut are made of 12Cr13 martensitic stainless steel, and then the impeller, spacer, balance plate, lock nut and thrust plate are installed and fixed on the main shaft to form the rotor group 2. Install the partition assembly with the rotor and seal into the casing; then the rotor assembly 2 is positioned in the casing and the partition assembly through the bearing assembly 3; then the left and right end covers are fixed to the cylinder body by bolts, and the installation of the vertically split seven-stage centrifugal compressor is completed.
[0026] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.
Claims
1. A centrifugal compressor for a toluene-to-benzene device, comprising a casing assembly (1), a rotor assembly (2), a bearing assembly (3) and a shaft end dry gas seal (4), It is characterized in that The casing group (1) comprises a cylinder (10), a partition group (11), a sealing group (12), a first end cover (13), a second end cover (14), an air inlet cylinder (15) and an air outlet cylinder (16); the rotor group (2) comprises a main shaft (20), an impeller (21), a spacer (22), a balancing plate (23), a lock nut (24) and a thrust plate (25); the partition group (11) is divided into two upper and lower halves of a horizontally split structural partition; a pair of the partitions are connected by tie rod bolts; the air inlet cylinder (15) and the air outlet cylinder (16) are welded and fixedly installed on the upper part of the cylinder (10); the second end cover (14) is fixedly installed on the cylinder (10) by bolts; a plurality of the impellers (21) are installed on the main shaft (20) by heat-fitting; the spacer (22) is installed between the plurality of the impellers (21); the last stage of the impeller The rear of the impeller (21) is mounted on the balancing disk (23) by means of heat-fitting, and the impeller (21), the spacer (22) and the balancing disk (23) are fixedly mounted on the main shaft (20) at both ends by means of the lock nut (24), and the thrust disk (25) is fixedly mounted on the main shaft (20) by means of the thrust lock nut, the seal group (12) is mounted in the partition group (11), the rotor group (2) is mounted in the partition group (11), the seal group (12) and the partition group (11) are mounted in the casing, the first end cover (13) is fixedly mounted on the cylinder (10) by means of bolts, the shaft end dry gas seal (4) is mounted in the cavity of the first end cover (13) and the second end cover (14), and the bearing group (3) is mounted in the positioning grooves of the first end cover (13) and the second end cover (14).
2. A centrifugal compressor for a toluene to benzene device according to claim 1, It is characterized in that The impeller (21) is a backward curved closed impeller with a diameter of 450 mm, 900 mm or 400 mm.
3. A centrifugal compressor for a toluene to benzene device according to claim 1, It is characterized in that The partition plate group (11) is made of QT400-18 castings or ZG230-450 castings.