阅读说明：本技术 一种适用于低温余压利用的大型有机工质发电装置 (Large-scale organic working medium power generation device suitable for low-temperature excess pressure utilization ) 是由 张晓东 黄果 李志明 唐丽丽 王鑫 张文祥 刘勐 翟璇 谢涛 赵海峰 苏正 张 于 2019-10-09 设计创作，主要内容包括：本发明公开了一种适用于低温余压利用的大型有机工质发电装置,属于有机工质透平膨胀机的技术领域,包括发电机部和机组透平部,所述发电机部与机组透平部装配成一体,机组透平部经有机工质通流膨胀做功,通过机组透平部运行驱动发电机部的转子旋转发电,且发电机部位于有机工质通流走向的相背一侧,以达到在超低排气温度下,实现透平和发电机转子一体化设计,同时解决发电机转子免受超低排气温度影响的目的。(The invention discloses a large organic working medium power generation device suitable for low-temperature residual pressure utilization, which belongs to the technical field of organic working medium turbo expanders and comprises a generator part and a unit turbine part, wherein the generator part and the unit turbine part are assembled into a whole, the unit turbine part performs through-flow expansion work through an organic working medium, a rotor of the generator part is driven to rotate through the operation of the unit turbine part to generate power, and the generator part is positioned on the opposite side of the through-flow direction of the organic working medium, so that the integrated design of a turbine and a generator rotor is realized at ultralow exhaust temperature, and the purpose that the generator rotor is prevented from being influenced by the ultralow exhaust temperature is also solved.)

1. The large organic working medium power generation device is characterized by comprising a generator part and a unit turbine part, wherein the generator part and the unit turbine part are assembled into a whole, the unit turbine part does work through the through-flow expansion of an organic working medium, a rotor of the generator part is driven to rotate to generate power through the operation of the unit turbine part, and the generator part is positioned on one side of the organic working medium in the through-flow direction and the back of the organic working medium.

2. The large-scale organic working medium power generation device suitable for low-temperature residual pressure utilization according to claim 1, further comprising an integrated rotor, wherein the integrated rotor is shared by the generator part and the unit turbine part.

3. The large-scale organic working medium power generation device suitable for low-temperature residual pressure utilization according to claim 1, wherein the generator part comprises a generator shell and a generator stator arranged inside the generator shell; the turbine part of the unit comprises a turbine cylinder, and the turbine cylinder is provided with an air inlet cavity and an air outlet cavity; and the generator stator and the turbine cylinder are matched with the integrated rotor.

4. The large-scale organic working medium power generation device suitable for low-temperature residual pressure utilization according to claim 3, wherein a first radial bearing and a second radial bearing are respectively arranged at two ends of the integrated rotor, and the first radial bearing and the second radial bearing are respectively assembled on the generator shell and the inner cavity wall of the turbine cylinder.

5. The large-scale organic working medium power generation device suitable for low-temperature residual pressure utilization according to claim 4, wherein the integrated rotor is provided with a thrust bearing, and the thrust bearing is positioned between the first radial bearing and the generator stator.

6. The large organic working medium power generation device suitable for low-temperature residual pressure utilization according to claim 3, wherein organic working medium flows through the air inlet chamber and the air outlet chamber, and the air inlet temperature range of the air inlet chamber is 0-100 ℃.

7. The large-scale organic working medium power generation device suitable for low-temperature residual pressure utilization according to claim 3, wherein the turbine cylinder is of a single-layer cylinder structure, an end flange is further arranged at the end of the turbine cylinder, and a generator shell, the turbine cylinder and the end flange are connected through bolts to form a closed shell.

8. The large-scale organic working medium power generation device suitable for low-temperature residual pressure utilization according to claim 1, 2 or 3, wherein the turbine part of the unit is of a multistage axial-flow turbine structure.

Technical Field

The invention belongs to the technical field of organic working medium turboexpanders, and particularly relates to a large organic working medium power generation device suitable for low-temperature excess pressure utilization.

Background

Natural gas is one of important energy applications in urban life as a clean energy with high calorific value. In the transportation process of the natural gas, in order to ensure long-distance transportation, the liquefied natural gas is firstly pressurized to a higher pressure (4-10 MPa), and then is transported to a gas utilization area through a pipeline. In the process of conveying to users, the pressure needs to be reduced to 0.1-0.4 MPa through the primary pressure reduction process to the secondary pressure reduction process, the partial pressure difference can be realized by adopting a pressure reducing valve, but the throttling loss is large; in addition, the expansion machine can be used for doing work through expansion, differential pressure energy is used for generating electricity, and gradient utilization of energy is achieved.

In the design of the organic working medium pressure reduction turbine with small power grade, the size of the turbine is not large; based on the convenience and cost consideration of the container loading and transportation of the equal-grade unit, the expander adopts the integrated design idea of the turbine and the generator rotor, namely the turbine and the generator share one rotor, the turbine and the generator adopt a single-layer cylinder design structure, the magnetic bearing is adopted to support the rotor, and the problem of working medium leakage is avoided. The temperature of the organic working medium subjected to decompression expansion by the expansion machine can reach about-30 ℃, the design and the type selection difficulty of the generator in the design scheme of the integrated rotor at the temperature is high, the internal structure (such as a stator winding) of the generator cannot normally operate and needs low-temperature protection mainly due to low temperature, but the problem of heat dissipation of the generator cannot be well solved while protection is carried out, and the generator can alarm and stop operation due to the fact that heat cannot be effectively dissipated; in addition, the cost is greatly increased. Therefore, the problem of low temperature operation environment of the generator needs to be solved.

Disclosure of Invention

In view of the above, in order to solve the above problems in the prior art, the present invention provides a large organic working medium power generation device suitable for low-temperature residual pressure utilization, so as to achieve the purpose of implementing an integrated design of a turbine and a generator rotor at an ultra-low exhaust temperature, and simultaneously solving the problem that the generator rotor is not affected by the ultra-low exhaust temperature.

The technical scheme adopted by the invention is as follows: the utility model provides a large-scale organic working medium power generation facility suitable for low temperature residual pressure utilizes, includes generator portion and unit turbine portion, generator portion and unit turbine portion assemble an organic whole, unit turbine portion through organic working medium through-flow in order to expand the acting, through the rotatory electricity generation of the rotor of unit turbine portion operation drive generator portion, and generator portion is located the back of the body one side of carrying on the back of the way of organic working medium through-flow trend.

Further, the integrated rotor is further included, and the generator part and the unit turbine part share the integrated rotor, so that the purposes of compact arrangement, cost reduction and convenience in overall transportation are achieved.

Further, the generator part comprises a generator shell and a generator stator arranged inside the generator shell; the turbine part of the unit comprises a turbine cylinder, and the turbine cylinder is provided with an air inlet cavity and an air outlet cavity; and the generator stator and the turbine cylinder are matched with the integrated rotor.

Further, a first radial bearing and a second radial bearing are respectively arranged at two ends of the integrated rotor and are respectively assembled on the generator shell and the inner cavity wall of the turbine cylinder so as to provide enough supporting acting force for the integrated rotor.

Further, the integrated rotor is provided with a thrust bearing which is positioned between the first radial bearing and the generator stator to balance the thrust of the integrated rotor.

Furthermore, the air inlet chamber and the air outlet chamber are communicated through an organic working medium, the air inlet temperature range of the air inlet chamber is between 0 ℃ and 100 ℃, and the safe operation environment of the generator can be ensured under the temperature condition.

Further, the turbine cylinder is of a single-layer cylinder structure, an end flange is further arranged at the end of the turbine cylinder, the generator shell, the turbine cylinder and the end flange are connected through bolts to form a closed shell, the closed shell has good sealing performance, and no organic working medium can be guaranteed to leak outwards in the operation process.

Furthermore, the turbine part of the unit is of a multi-stage axial flow turbine structure, and the capacity of the unit can be improved towards megawatt level by adopting the structure.

The invention has the beneficial effects that:

1. by adopting the large organic working medium power generation device suitable for low-temperature residual pressure utilization, the generator part and the unit turbine part are integrally designed, and meanwhile, the generator part is arranged on the opposite side of the through flow direction of the organic working medium, so that the influence of the ultralow exhaust temperature (-50-0 ℃) borne by a generator rotor can be effectively avoided, the normal operation of the internal structure (such as a stator winding) of the generator cannot be influenced by the low temperature, the problem that the generator cannot operate in a low-temperature environment is solved, and the cost of power generation of the large organic working medium is reasonably controlled.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a large organic working medium power generation device suitable for low-temperature residual pressure utilization, provided by the invention;

the drawings are labeled as follows:

1-a turbine cylinder, 2-a generator shell, 3-an integrated rotor, 4-a thrust bearing, 5-a first radial bearing, 6-a second radial bearing, 7-an end flange, 8-a generator stator, 9-an air inlet chamber, 10-an air outlet chamber, 11-a generator end and 12-a gas end.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be further noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases by those skilled in the art; the drawings in the embodiments are used for clearly and completely describing the technical scheme in the embodiments of the invention, and obviously, the described embodiments are a part of the embodiments of the invention, but not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.