Unit structure for driving compressor by steam turbine
By integrating the steam turbine and compressor into an integrated structure, the mechanical losses and economic problems caused by multi-equipment configuration in the prior art are solved, and a more efficient and economical unit design is achieved.
Patent Information
- Application Number
- CN202420503085.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The existing turbine-driven compressor structure requires multiple equipment to be installed, resulting in increased mechanical losses and reduced economicality.
The backpressure turbine and compressor structure are integrated into an integrated structure, and the turbine and compressor are coaxial. The turbine can be designed at the same speed according to the compressor, eliminating the arrangement of the intermediate gear box.
It reduces the mechanical loss of the equipment and improves the economics of the unit. The turbine efficiency is 5%-10% higher than that of conventional turbines. The integrated unit design can reduce the mechanical loss of unit power by 4%-8%.
Smart Images
Figure CN222558603U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steam turbines, in particular to a unit structure of a steam turbine driving a compressor. Background Art
[0002] The conventional steam turbine driven compressor structure is a steam turbine driving the compressor through a coupling, and a speed increasing gearbox or a speed reducing gearbox is required according to the speed of the compressor, so three devices will be designed: steam turbine + gearbox + compressor. At the same time, the three units need to be equipped with a large centralized lubrication oil station to provide bearing lubrication for the three devices. All three devices have mechanical losses, such as bearing mechanical losses and gear transmission losses. Summary of the invention
[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a unit structure of a steam turbine driven compressor, in which a back-pressure steam turbine and a compressor structure are integrated into an integral structure, the steam turbine and the compressor are coaxial, the steam turbine can be designed to have the same speed as the compressor, eliminating the need for an intermediate gear box, and reducing the mechanical loss of the equipment, making the unit more economical.
[0004] The purpose of the utility model is achieved in this way:
[0005] A unit structure of a steam turbine driven compressor comprises a steam turbine rotor, and also comprises a first-stage compressor, a first-stage compressor connecting body, a thrust bearing housing, a first-stage compressor radial bearing housing, a steam turbine exhaust casing, a steam turbine inlet casing, a second-stage compressor radial bearing housing, a second-stage compressor connecting body, and a second-stage compressor which are connected in sequence. The steam turbine rotor penetrates the first-stage compressor connecting body, the thrust bearing housing, the first-stage compressor radial bearing housing, the steam turbine exhaust casing, the steam turbine inlet casing, the second-stage compressor radial bearing housing, and the second-stage compressor connecting body. Both ends of the steam turbine rotor are connected to the compressor impeller of the first-stage compressor and the compressor impeller of the second-stage compressor.
[0006] A turbine steam inlet nozzle guide ring, a turbine nozzle ring and a turbine exhaust guide structure are arranged between the turbine rotor and the turbine exhaust casing and the turbine inlet casing; a thrust plate is arranged on the turbine rotor, and a thrust bearing is arranged between the thrust plate and the thrust bearing housing; radial bearings are arranged between the turbine rotor and the radial bearing housing of the first-stage compressor and the radial bearing housing of the second-stage compressor, respectively.
[0007] Preferably, both sides of the radial bearing housing of the first-stage compressor and the radial bearing housing of the second-stage compressor are respectively connected to radial bearing housing support scaffolds, and the radial bearing housing support scaffolds support the unit structure of the steam turbine-driven compressor.
[0008] Preferably, the steam turbine rotor is an integrally forged structure, and the steam turbine blades are installed on the wheel grooves of the steam turbine rotor.
[0009] Preferably, the two ends of the steam turbine rotor are connected to transmit torque through end face gears, compressor tie rods and compressor impellers of the first-stage compressor and the second-stage compressor respectively.
[0010] Preferably, the steam turbine steam inlet casing and the steam turbine exhaust casing are both integral casings with equal cross-section annular structures.
[0011] Preferably, the first-stage compressor and the second-stage compressor are arranged back to back.
[0012] Preferably, steam seals are provided between the turbine rotor and the compressor impeller, the turbine exhaust casing, and the turbine inlet casing, respectively.
[0013] Preferably, oil seals are respectively provided between the turbine rotor and the radial bearing housing of the first-stage compressor and the radial bearing housing of the second-stage compressor.
[0014] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:
[0015] The whole unit assembly adopts the axial installation structure. The steam turbine inlet casing 6 and the steam turbine exhaust casing 5 are both integral casings with equal cross-section annular form. Different from the horizontal split structure of the traditional steam turbine, its regular shape has better fluidity, small airflow loss and high efficiency. At the same time, the integral structure has better pressure bearing capacity.
[0016] The steam turbine follows the compressor with a high speed design. When the speed is increased, the corresponding structural size of the steam turbine is reduced, making the unit structure more compact and occupying less space. At the same time, the efficiency of the steam turbine is 5%-10% higher than that of conventional steam turbines.
[0017] The integrated unit design can reduce mechanical losses of the unit power by 4%-8%.
[0018] The back-to-back design of the compressors can reduce the axial aerodynamic thrust of the unit, reduce the difficulty of thrust bearing design, and at the same time reduce the power consumption of the thrust bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the utility model.
[0020] Attached photos
[0021] In the accompanying drawings, 1 is a first-stage compressor, 2 is a first-stage compressor connecting body, 3 is a thrust bearing housing, 4 is a first-stage compressor radial bearing housing, 5 is a turbine exhaust housing, 6 is a turbine inlet housing, 7 is a radial bearing housing support bracket, 8 is a second-stage compressor radial bearing housing, 9 is a second-stage compressor connecting body, 10 is a second-stage compressor, 11 is a compressor tie rod, 12 is a compressor impeller, 13 is a compressor steam seal sleeve, 14 is a thrust plate locking nut, 15 is a thrust bearing, 16 is a thrust plate, 17 is a radial bearing, 18 is a steam seal sleeve, 19 is a turbine exhaust guide structure, 20 is a turbine nozzle ring, 21 is a turbine rotor, 22 is an inlet nozzle guide ring, 23 is a balance steam seal, 24 is a radial bearing inner oil seal, 25 is a radial bearing outer oil seal, and 26 is a compressor sleeve. DETAILED DESCRIPTION
[0022] A steam turbine driven compressor unit structure, comprising a steam turbine rotor 21, and also comprising a first-stage compressor 1, a first-stage compressor connector 2, a thrust bearing housing 3, a first-stage compressor radial bearing housing 4, a steam turbine exhaust casing 5, a steam turbine inlet casing 6, a second-stage compressor radial bearing housing 8, a second-stage compressor connector 9, and a second-stage compressor 10 connected in sequence, wherein the steam turbine rotor 21 penetrates the first-stage compressor connector 2, the thrust bearing housing 3, the first-stage compressor radial bearing housing 4, the steam turbine exhaust casing 5, the steam turbine inlet casing 6, the second-stage compressor radial bearing housing 8, the second-stage compressor connector 9, and the steam turbine rotor 21 passes through ... The two ends of the rotor 21 are connected to the compressor impeller of the first-stage compressor 1 and the compressor impeller 12 of the second-stage compressor 10. A turbine steam inlet nozzle guide ring 22, a turbine nozzle ring 20, and a turbine exhaust guide structure 19 are arranged between the turbine rotor 21 and the turbine exhaust casing 5 and the turbine inlet casing 6 to form a steam turbine. A thrust plate 16 is arranged on the turbine rotor 21, and a thrust bearing 15 is arranged between the thrust plate 16 and the thrust bearing housing 3 to withstand axial force. Radial bearings 17 are respectively arranged between the turbine rotor 21 and the first-stage compressor radial bearing housing 4 and the second-stage compressor radial bearing housing 8 to withstand radial force.
[0023] Preferably, both sides of the radial bearing housing 4 of the first compressor and the radial bearing housing 8 of the second compressor are respectively connected to the radial bearing housing support ledge 7, and the radial bearing housing support ledge 7 supports the unit structure of the steam turbine driven compressor.
[0024] Preferably, the steam turbine rotor 21 is a one-piece forging structure, and steam turbine blades are installed on the wheel grooves of the steam turbine rotor 21 .
[0025] Preferably, both ends of the steam turbine rotor 21 are connected to transmit torque through end face gears, compressor tie rods 11 and compressor impellers 12 of the first-stage compressor 1 and the second-stage compressor 10 .
[0026] Preferably, the steam turbine inlet casing 6 and the steam turbine exhaust casing 5 are both integral casings with a uniform cross-section annular structure.
[0027] Preferably, the first-stage compressor 1 and the second-stage compressor 10 are arranged in back-to-back orientation.
[0028] Preferably, steam seals are provided between the steam turbine rotor 21 and the compressor impeller 12 , the steam turbine exhaust casing 5 , and the steam turbine inlet casing 6 , respectively.
[0029] Preferably, oil seals are provided between the steam turbine rotor 21 and the radial bearing housing 4 of the first-stage compressor and the radial bearing housing 8 of the second-stage compressor, respectively.
[0030] This patent integrates the back-pressure steam turbine and compressor structure into an integrated structure. The steam turbine and the compressor are coaxial, and the steam turbine can be designed to have the same speed as the compressor, eliminating the need for an intermediate gearbox. At the same time, it reduces the mechanical loss of the equipment, making the unit more economical.
[0031] Assembly structure and instructions:
[0032] 1) A first-stage compressor 1, a first-stage compressor connecting body 2, a thrust bearing housing 3, a first-stage compressor radial bearing housing 4, a steam turbine exhaust casing 5, a steam turbine inlet casing 6, a second-stage compressor radial bearing housing 8, a second-stage compressor connecting body 9, and a second-stage compressor 10 are connected by axial connecting bolts.
[0033] 2) The entire steam turbine compressor unit is supported and fixed by the radial bearing housing support brackets 7, with one bracket on each of the left and right sides of the outer side of each radial bearing housing.
[0034] 3) The turbine steam inlet nozzle guide ring 22, the turbine nozzle ring 20, and the turbine exhaust steam guide structure 19 are all installed inside the turbine steam inlet casing 6 and the turbine exhaust casing 5.
[0035] 4) The steam turbine rotor 21 is an integrally forged structure, and the blades are directly mounted on the rotor grooves.
[0036] 5) The two ends of the turbine rotor are connected to transmit torque through end face teeth, tie rods 11 and compressor impellers 12.
[0037] 6) The entire unit assembly adopts an axial installation structure. The steam turbine inlet casing 6 and the steam turbine exhaust casing 5 are both integral casings in the form of equal-section rings. Different from the horizontally split structure of traditional steam turbines, their regular shapes have better fluidity, small airflow losses, and high efficiency. At the same time, the integral structure has better pressure bearing capacity.
[0038] 7) The turbine follower compressor adopts a high speed design. When the speed is increased, the corresponding structural size of the turbine is reduced, making the unit structure more compact and occupying less space. At the same time, the efficiency of the turbine is 5%-10% higher than that of conventional turbines.
[0039] 10) The integrated unit design can reduce the mechanical loss of the unit power by 4%-8%.
[0040] 11) The back-to-back design of the compressors can reduce the axial aerodynamic thrust of the unit, reduce the difficulty of thrust bearing design, and reduce the power consumption of thrust bearings.
[0041] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.
Claims
1. A steam turbine driven compressor unit structure, comprising a steam turbine rotor, characterized in that: It also includes a first-stage compressor, a first-stage compressor connecting body, a thrust bearing housing, a first-stage compressor radial bearing housing, a turbine exhaust casing, a turbine inlet casing, a second-stage compressor radial bearing housing, a second-stage compressor connecting body, and a second-stage compressor, which are connected in sequence. The turbine rotor penetrates the first-stage compressor connecting body, the thrust bearing housing, the first-stage compressor radial bearing housing, the turbine exhaust casing, the turbine inlet casing, the second-stage compressor radial bearing housing, and the second-stage compressor connecting body. Both ends of the turbine rotor are connected to the compressor impeller of the first-stage compressor and the compressor impeller of the second-stage compressor. A turbine steam inlet nozzle guide ring, a turbine nozzle ring and a turbine exhaust guide structure are arranged between the turbine rotor and the turbine exhaust casing and the turbine inlet casing; a thrust plate is arranged on the turbine rotor, and a thrust bearing is arranged between the thrust plate and the thrust bearing housing; radial bearings are arranged between the turbine rotor and the radial bearing housing of the first-stage compressor and the radial bearing housing of the second-stage compressor, respectively.
2. The unit structure of a steam turbine driven compressor according to claim 1, characterized in that: The radial bearing housings of the first-stage compressor and the second-stage compressor are respectively connected to radial bearing housing support scaffolds, and the radial bearing housing support scaffolds support the unit structure of the steam turbine-driven compressor.
3. The unit structure of a steam turbine driven compressor according to claim 1, characterized in that: The steam turbine rotor is a one-piece forged structure, and the steam turbine blades are installed on the wheel grooves of the steam turbine rotor.
4. The unit structure of a steam turbine driven compressor according to claim 1, characterized in that: The two ends of the steam turbine rotor are connected to transmit torque through end face gears, compressor tie rods and compressor impellers of the first-stage compressor and the second-stage compressor.
5. The unit structure of a steam turbine driven compressor according to claim 1, characterized in that: The steam inlet casing of the steam turbine and the steam exhaust casing of the steam turbine are both integral casings with equal cross-section annular structures.
6. The unit structure of a steam turbine driven compressor according to claim 1, characterized in that: The first-stage compressor and the second-stage compressor are arranged back to back.
7. The unit structure of a steam turbine driven compressor according to claim 1, characterized in that: Steam seals are provided between the turbine rotor and the compressor impeller, the turbine exhaust casing and the turbine inlet casing.
8. The unit structure of a steam turbine driven compressor according to claim 1, characterized in that: Oil seals are respectively arranged between the turbine rotor and the radial bearing housing of the first-stage compressor and the radial bearing housing of the second-stage compressor.