CN106640222B - A kind of skid-mounted type natural gas line generator - Google Patents

Abstract

The invention particularly provides a skid-mounted natural gas pipeline generator, including an inlet manifold, a main inlet manifold, a power assembly, a generator assembly, a main outlet manifold, a bypass manifold, and an outlet manifold. When the skid-mounted natural gas pipeline generator is working, close the bypass valve at the bypass manifold, open the main inlet valve at the main inlet manifold, and open the main outlet valve at the main outlet manifold, Make the natural gas circulate along the main inlet manifold, power assembly, main outlet outlet manifold, and outlet manifold. When the natural gas flows through the power assembly, the natural gas will drive the power tool to rotate, and then the power tool will be driven by the cardan shaft. The generated rotation is transmitted to the transmission shaft, and the transmission shaft transmits the rotation to the generator rotor, which finally makes the generator work; adjusting the main inlet valve can control the flow of natural gas, and finally control the power generation of the generator. If you need to close the pipeline generator, you only need to open the bypass valve, close the main inlet valve and the main outlet valve.

Description

A skid-mounted natural gas pipeline generator

technical field

The invention relates to a pipeline generator used in a natural gas gathering station.

Background technique

In the production process of gas wells, after natural gas is extracted from underground gas reservoirs, it is transported to the natural gas station by the natural gas pipeline network. At this time, the natural gas still has a certain pressure. Delivery pressure will have some practical significance. Especially in winter and spring, due to the low ambient temperature, natural gas pipelines need to be heated. How to heat natural gas pipelines has become a practical issue. Based on the above technical background, the present invention provides a skid-mounted natural gas pipeline generator, which uses electric energy to heat the natural gas pipeline.

Contents of the invention

The invention specifically provides a skid-mounted natural gas pipeline generator to solve the problems of difficulty in power consumption in natural gas stations and difficulty in heating natural gas transmission pipelines when the ambient temperature is low.

The invention specifically provides a skid-mounted natural gas pipeline generator, including an inlet manifold, a main inlet manifold, a power assembly, a generator assembly, a main outlet manifold, a bypass manifold, an outlet manifold, an inlet The right end of the manifold and the upper end of the main intake manifold are connected by butt welding, the right end of the inlet manifold and the left end of the bypass manifold are connected by butt welding, the right end of the main intake manifold and the left end of the power assembly are connected by bolts, and the power assembly The right end of the generator assembly is connected with the left end of the generator assembly by a bolt group, the right part of the power assembly is connected with the lower end of the main vent manifold by socket welding, the upper end of the main vent manifold and the left end of the outlet manifold are connected by butt welding, and the side The right end of the through manifold and the left end of the outlet manifold are connected by butt welding.

The inlet manifold is composed of flange I, steel pipe I and tee joint I. The right end of flange I is connected to the left end of steel pipe I by butt welding, and the right end of steel pipe I is connected to the left end of tee joint I by butt welding.

The beneficial effects of the present invention are: the inlet manifold gathers the natural gas transported from various places, which is convenient for centralized processing of the natural gas; Provides switchable runners.

Further, the main air intake manifold is composed of steel pipe II, elbow joint, steel pipe III, and main air intake valve. The upper end of the steel pipe II is connected to the lower end of the three-way joint I by butt welding, and the lower end of the steel pipe II is connected to the steel pipe III. The left end is connected by an elbow joint, and the right end of the steel pipe III is connected by a flange to the left end of the main inlet valve.

The beneficial effect of adopting the above-mentioned further technical solution is: use the elbow joint to adjust the laying direction of the main inlet manifold; control the natural gas flow of the main inlet manifold and the opening of the main inlet manifold by adjusting the main inlet valve Or close, thereby controlling the working state of the pipeline generator.

Further, the power assembly is composed of flange II, power tool, tailpipe, and cardan shaft, the flange II is connected to the right end of the main intake valve by a bolt group, and the right end of flange II is connected to the left end of the power tool by thread The connection between the left end of flange II and the right end of the main intake valve is sealed with a rubber seal; the power tool is a screw motor, and the screw motor is composed of a screw motor casing, a rubber bushing, and a screw motor rotor. The screw The left end of the motor casing is threaded to the right end of flange II, the right end of the screw motor casing is threaded to the left end of the tail pipe, the right end of the screw motor rotor is threaded to the left end of the cardan shaft; a socket is provided in the middle of the tail pipe, There is a step at the right end of the tail pipe, and at least eight bolt holes are arranged on the step; the cardan shaft is installed in the inner chamber of the tail pipe.

The beneficial effect of adopting the above further technical solution is: using natural gas to drive the rotor of the power tool to rotate, and to transmit the rotation generated by the rotor of the power tool through the cardan shaft to provide a power source for the rotation of the rotor of the generator; and after the rotor of the power tool is driven by natural gas to rotate, The pressure of natural gas is reduced, which is conducive to the safe transportation of natural gas in the pipeline.

Further, the generator assembly is composed of a transmission shaft, a radial thrust bearing, a left end cover of a bearing, a right end cover of a bearing, a bearing protection sleeve, a flange III, a flange IV, and a generator. The left end of the transmission shaft is connected to the cardan shaft The right end adopts threaded connection, a step is arranged outside the transmission shaft, a blind hole is arranged inside the transmission shaft, at least one air inlet is arranged at the left side of the blind hole, and the air inlet blinds the inside of the transmission shaft. The hole communicates with the inner cavity of the tail pipe, and at least one air outlet is provided at the right side of the blind hole, and the air outlet connects the blind hole inside the drive shaft with the inner cavity of the generator; the centripetal thrust bearing is installed outside the drive shaft The left and right ends of the step; the bearing protection sleeve is installed outside the radial thrust bearing, and an oil injection hole is provided on the bearing protection sleeve; a step is provided inside the flange III, and the inner diameter of the left part of the flange III is larger than the inner diameter of the right part , the flange III is provided with at least eight bolt holes uniformly arranged along the circumference, the inner cavity of the right part of the flange III is connected with the left end of the bearing protective sleeve by socket welding, and the flange III is connected with the step at the right end of the tailpipe by a bolt group, In addition, a metal gasket is used to seal the flange III and the step at the right end of the tail pipe; there is a step inside the flange IV, and the inner diameter of the right part of the flange IV is larger than the inner diameter of the left part, and at least eight flanges along the circumference are arranged on the flange IV. Evenly arranged screw holes, socket welding connection between the inner cavity of the left part of flange IV and the right end of the bearing protective sleeve; the left end cover of the bearing is installed in the left inner cavity of flange III, and the left end cover of the bearing and the left inner cavity of flange III are assembled by screws connection; the right end cover of the bearing is installed in the inner cavity of the right part of flange IV, and the right end cover of the bearing is connected with the inner cavity of the right part of flange IV by a screw group; the generator is mainly composed of a generator rotor, magnetic steel, spacer sleeve, coil, power The generator casing and the generator end cover are composed, the generator rotor is connected with the right part of the drive shaft by a key, the magnetic steel is installed on the generator rotor, the spacer sleeve is installed outside the generator rotor, and the coil is wound on Inside the generator casing, the left end of the generator casing is connected to flange IV by a screw group, and the space between flange IV and the isolation sleeve is sealed by a rubber sealing ring.

The beneficial effect of adopting the above-mentioned further technical solution is: the rotation of the power tool rotor is transmitted to the transmission shaft by the cardan shaft, and then the rotation is transmitted to the generator rotor by the transmission shaft, thereby driving the generator to work; flange III and the right end of the tail pipe Metal gaskets are used to seal between the steps. When the radial thrust bearing becomes loose, the bearing can be re-clamped by adjusting the thickness of the metal gasket; because the transmission shaft is provided with air inlet holes and air outlet holes, when natural gas flows through the inner cavity of the tailpipe , the natural gas will enter the blind hole inside the drive shaft through the air inlet hole on the drive shaft, and then enter the inner cavity of the generator through the air outlet hole on the drive shaft, so that the left end cover of the bearing and the right end cover of the bearing are all affected by the air pressure. It can relieve the force of the radial thrust bearing and prolong the service life of the radial thrust bearing; the bearing protection sleeve is provided with an oil injection hole, which is convenient for regular oil lubrication or grease lubrication of the radial thrust bearing; the isolation sleeve is made of non-magnetic material It is used to isolate the natural gas and the coil, prevent the natural gas from contacting the coil, and ensure that the coil works in a good environment.

Further, the main air outlet manifold is composed of steel pipe IV, main air outlet valve, and steel pipe V, the lower end of the steel pipe IV is connected to the socket hole in the middle of the tailpipe by socket welding, and the upper end of the steel pipe IV is connected to the main air outlet. The lower end of the valve is flanged, and the upper end of the main outlet valve is flanged to the lower end of the steel pipe V.

The beneficial effect of adopting the above further technical solution is: the main outlet manifold provides an outflow channel for the natural gas after driving the power tool to rotate; the main outlet valve is used to adjust the channel switching between the main manifold and the bypass manifold.

Further, the bypass manifold is composed of a steel pipe VI, a bypass valve, and a steel pipe VII. The left end of the steel pipe VI is connected to the right end of the tee joint I by butt welding, and the right end of the steel pipe VI is connected to the left end of the bypass valve by a flange. The right end of the through valve is flanged to the left end of the steel pipe VII.

The beneficial effect of adopting the above further technical solution is: when the pipeline generator stops working, the bypass manifold provides a bypass flow channel for the natural gas, and the bypass valve is used to control the opening or closing of the bypass manifold.

Further, the outlet manifold is composed of a tee joint II, a steel pipe VIII, and a flange V, the left end of the tee joint II is connected to the right end of the steel pipe VII by butt welding, and the lower end of the tee joint II is connected to the upper end of the steel pipe V by butt welding , The right end of the tee joint Ⅱ is connected with the left end of the steel pipe Ⅷ by butt welding, and the right end of the steel pipe Ⅷ is connected with the left end of the flange Ⅴ by butt welding.

The beneficial effect of adopting the above further technical solution is: the outlet manifold is used to receive the natural gas flowing out of the main gas outlet manifold or the bypass manifold, and then transported to the destination through the outlet manifold.

Further, the power tool can also be a turbine motor. The turbine motor is mainly composed of a turbine shaft, a turbine rotor, a turbine stator, a turbine casing, a guide device, and a positioning device. The left end of the turbine casing is threaded to the right end of flange II, and the right end of the turbine casing It is threaded with the left end of the tail pipe, and the right end of the turbine shaft is threaded with the left end of the cardan shaft.

The beneficial effect of adopting the above-mentioned further technical solution is: since the speed of the turbine motor is higher than that of the screw motor, when the turbine motor drives the generator rotor to rotate, the generator rotor can obtain a higher speed, thereby increasing the power generation, so the turbine motor is suitable In the case of high power.

Description of drawings:

Fig. 1 is a sectional structural diagram of a skid-mounted natural gas pipeline generator of the present invention;

Fig. 2 is a sectional structure diagram of the inlet manifold in Fig. 1;

Fig. 3 is a cross-sectional structure diagram of the main ventilation intake manifold in Fig. 1;

Fig. 4 is a sectional structure diagram of the power assembly in Fig. 1;

Fig. 5 is a sectional structure diagram of the generator assembly in Fig. 1;

Fig. 6 is a cross-sectional structure diagram of the main outlet manifold in Fig. 1;

Fig. 7 is a cross-sectional structure diagram of the bypass manifold in Fig. 1;

Fig. 8 is a sectional structure diagram of the outlet manifold in Fig. 1;

Fig. 9 is a structural diagram of an embodiment of the turbine motor on the powertrain.

In the accompanying drawings, the parts list represented by each label is as follows:

01. Inlet Manifold, 02. Main Inlet Manifold, 03 Powertrain, 04. Generator Assembly, 05. Main Outlet Manifold, 06. Bypass Manifold, 07. Outlet Manifold, 011. Method Lan Ⅰ, 012. Steel pipe Ⅰ, 013. Tee joint Ⅰ, 021. Steel pipe Ⅱ, 022. Elbow joint, 023. Steel pipe Ⅲ, 024. Main inlet valve, 031. Flange Ⅱ, 032. Screw motor, 033 .Channel shaft, 034. Tail pipe, 035. Socket socket, 036. Turbine motor, 041. Transmission shaft, 042. Radial thrust bearing, 043. Bearing protection sleeve, 044. Bearing left end cover, 045. Bearing right end cover , 046. Flange Ⅲ, 047. Flange Ⅳ, 048. Generator, 0411. Air inlet, 0412. Air outlet, 051. Steel pipe Ⅳ, 052. Main outlet valve, 053. Steel pipe Ⅴ, 061. Steel pipe Ⅵ , 062. Bypass valve, 063. Steel pipe Ⅶ, 071. Tee joint Ⅱ, 072. Steel pipe Ⅷ, 073. Flange Ⅴ.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Refer to Fig. 1 for a cross-sectional structure diagram of a skid-mounted natural gas pipeline generator of the present invention. The natural gas pipeline generator includes an inlet manifold 01, a main inlet manifold 02, a power assembly 03, a generator assembly 04, a Outlet Manifold 05, Bypass Manifold 06, Outlet Manifold 07, the right end of Inlet Manifold 01 and the upper end of Main Air Intake Manifold 02 are connected by butt welding, and the right end of Inlet Manifold 01 and the left end of Bypass Manifold 06 are connected by butt welding. Butt welding connection, the right end of the main intake manifold 02 is connected with the left end of the power assembly 03 by a bolt set, the right end of the power assembly 03 is connected with the left end of the generator assembly 04 by a bolt set, the right end of the power assembly 03 is connected with the main air outlet pipe The lower end of the manifold 05 is connected by socket welding, the upper end of the main outlet manifold 05 is connected to the left end of the outlet manifold 07 by butt welding, and the right end of the bypass manifold 06 is connected to the left end of the outlet manifold 07 by butt welding.

Refer to Fig. 2 for a cross-sectional structural diagram of a skid-mounted natural gas pipeline generator inlet manifold 01 of the present invention. The inlet manifold is composed of a flange I011, a steel pipe I012, and a tee joint I013. The right end of the flange I011 is connected to the steel pipe The left end of I012 is connected by butt welding, and the right end of the steel pipe I012 and the left end of the tee joint I013 are connected by butt welding.

Refer to Figure 3 for the cross-sectional structural diagram of the main intake manifold 02 of a skid-mounted natural gas pipeline generator in the present invention. The main intake manifold is composed of steel pipe II 021, elbow joint 022, steel pipe III 023, and main intake valve 024. The upper end of the steel pipe II021 is connected to the lower end of the tee joint I013 by butt welding, the left end of the steel pipe II021 is connected to the left end of the steel pipe III023 by an elbow joint 022, and the right end of the steel pipe III023 is connected to the left end of the main inlet valve 024 by a flange.

Refer to Fig. 4 for a sectional structural diagram of a skid-mounted natural gas pipeline generator power assembly 03 of the present invention. The power assembly is composed of a flange II 031, a power tool 032, a cardan shaft 033, and a tail pipe 034. The right end of flange II 031 and the main intake valve 024 are connected by a bolt group, the right end of flange II 031 and the left end of power tool 032 are connected by threads, and the left end of flange II 031 and the right end of the main intake valve 024 are sealed with a rubber seal ring; The power tool 032 is a screw motor, and the screw motor is composed of a screw motor casing, a rubber bush, and a screw motor rotor. Threaded connection, the right end of the screw motor rotor and the left end of the cardan shaft 033 are threaded; the middle part of the tail pipe 034 is provided with a socket hole 035, and the right end of the tail pipe 034 is provided with a step, and there are at least eight steps on the step. bolt holes; the cardan shaft 033 is installed in the inner cavity of the tail pipe 034.

Refer to Figure 5 for a cross-sectional structure diagram of a skid-mounted natural gas pipeline generator generator assembly 04 of the present invention, the generator assembly 04 is composed of a transmission shaft 041, a centripetal thrust bearing 042, a left end cover of the bearing 043, and a right end cover of the bearing 044, bearing protection sleeve 045, flange III 046, flange IV 047, and generator 048. The left end of the transmission shaft 041 is connected to the right end of the cardan shaft 033 by threads, and a step is arranged outside the transmission shaft 041. The transmission shaft There is a blind hole inside the 041, and at least one air inlet 0411 is arranged at the left side of the blind hole, and the air inlet 0411 communicates the blind hole inside the drive shaft with the inner cavity of the tail pipe 034, and the right side of the blind hole At least one air outlet 0412 is provided at the position, and the air outlet 0412 connects the internal blind hole of the transmission shaft 041 with the inner cavity of the generator 048; the centripetal thrust bearing 042 is installed at the left and right ends of the external steps of the transmission shaft 041; The bearing protection sleeve 043 is installed on the outside of the radial thrust bearing 042, and the bearing protection sleeve 043 is provided with an oil injection hole; the inside of the flange III 046 is provided with a step, and the inner diameter of the left part of the flange III 046 is larger than that of the right part. There are at least eight bolt holes evenly arranged along the circumference on Ⅲ046. The inner cavity of the right part of flange Ⅲ046 is connected with the left end of bearing protection sleeve 043 by socket welding. A metal gasket is used to seal between III046 and the step at the right end of the tailpipe 034; there is a step inside the flange IV047, the inner diameter of the right part of the flange IV047 is larger than the inner diameter of the left part, and there are at least eight uniformly arranged along the circumference of the flange IV047. Screw holes, the left inner cavity of flange IV 047 and the right end of bearing protective sleeve 043 are connected by socket welding; the left end cover 044 of the bearing is installed in the left inner cavity of flange III 046, and the left end cover 044 of the bearing is connected with the left inner cavity of flange III 046 by screw assembly connection; the bearing right end cover 045 is installed in the inner cavity of the right part of flange IV 047, and the bearing right end cover 045 is connected with the inner cavity of the right part of flange IV 047 by a screw group; the generator 048 is mainly composed of a generator rotor, a magnetic steel, an isolation sleeve, Coil, generator shell, generator end cover, the generator rotor is connected with the right part of the transmission shaft 041 by a key, the magnetic steel is installed on the generator rotor, the isolation sleeve is installed outside the generator rotor, the The above-mentioned coil is wound in the generator shell, and the left end of the generator shell is connected with the flange IV047 by a screw group, and the flange IV047 and the isolation sleeve are sealed with a rubber sealing ring.

Refer to Figure 6 for the cross-sectional structural diagram of the main outlet valve 05 of a skid-mounted natural gas pipeline generator in the present invention. The main outlet manifold is composed of steel pipe IV051, main outlet valve 052, and steel pipe V053. The lower end of the steel pipe IV051 The socket hole 035 set in the middle of the tail pipe 034 is connected by socket welding, the upper end of the rigid pipe IV 051 is flanged to the lower end of the main outlet valve 052, and the upper end of the main outlet valve 052 is connected to the lower end of the steel pipe V053 by a flange.

Refer to Figure 7 for a cross-sectional structural diagram of a skid-mounted natural gas pipeline generator bypass manifold 06 of the present invention. The bypass manifold 06 is composed of a steel pipe VI061, a bypass valve 062, and a steel pipe VII063. The left end of the steel pipe VI061 is connected to The right end of tee joint Ⅰ013 adopts butt welding connection, the right end of steel pipe VI061 and the left end of bypass valve 062 adopt flange connection, and the right end of bypass valve 062 and the left end of steel pipe VII063 adopt flange connection.

Refer to Fig. 8 for a cross-sectional structural diagram of a skid-mounted natural gas pipeline generator outlet manifold 07 of the present invention. The outlet manifold 07 is composed of a tee joint II071, a steel pipe VIII072, and a flange V073. The left end of the tee joint II071 is The right end of the steel pipe Ⅶ063 is connected by butt welding, the lower end of the tee joint Ⅱ071 is connected to the upper end of the steel pipe Ⅴ053 by butt welding, the right end of the tee joint Ⅱ071 is connected to the left end of the steel pipe Ⅷ072 by butt welding, and the right end of the steel pipe Ⅷ072 is connected to the left end of the flange Ⅴ073 by butt welding.

A skid-mounted natural gas pipeline generator of the present invention can also use a turbine motor as a power source. The structure diagram of the implementation of the turbine motor 036 on the power assembly 03 is shown in Figure 9. The turbine motor 038 is mainly composed of a turbine shaft, a turbine rotor, Turbine stator, turbine casing, guide device, positioning device, the left end of the turbine casing is threaded to the right end of flange II 031, the right end of the turbine casing is threaded to the left end of the tailpipe 034, the right end of the turbine shaft is connected to the left end of the cardan shaft 033 Threaded connection.

In a specific embodiment, the opening or closing of the pipeline generator can be controlled by adjusting the main passage inlet valve 024, the main passage outlet valve 052, and the bypass valve 062. When the pipeline generator is working, it can be adjusted by adjusting the main passage The intake valve 024 is used to control the flow of natural gas, thereby controlling the generating power of the generator.

In describing the present invention, it is to be understood that the terms "centre", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", The orientation or positional relationship indicated by "inner" is based on the orientation or positional relationship shown in the assembly drawing of the parts, which is only for the convenience of describing the simplified description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, so as to Specific orientation configurations and operations, therefore, are not to be construed as limitations on the invention.

In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two elements or the interaction relationship between two parts. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the first and the second being directly in contact with each other, and may also include the first and the second The features are not in direct contact but through another feature between them. Moreover, "above", "above", "above" and "upper" of a first feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature Two features. "Below", "beneath", "beneath" and "below" the first feature on the second feature include that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

The downhole negative pressure sand dredging tool invented in this paper has been introduced in detail above, and specific examples are used in this paper to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, As stated above, the content of the description of the present invention should not be construed as limiting the present invention.

Claims (1)

1. A skid-mounted natural gas pipeline generator, including inlet manifold (01), main air intake manifold (02), power assembly (03), generator assembly (04), main air outlet manifold ( 05), bypass manifold (06), outlet manifold (07); the feature is: the right end of the inlet manifold (01) is connected to the upper end of the main inlet manifold (02) by butt welding, and the inlet manifold (01) The right end and the left end of the bypass manifold (06) are connected by butt welding, the right end of the main intake manifold (02) is connected to the left end of the power assembly (03) by a bolt group, and the right end of the power assembly (03) is connected to the generator assembly The left end of the assembly (04) is connected by a bolt group, the right part of the power assembly (03) is connected with the lower end of the main air outlet manifold (05) by socket welding, and the upper end of the main air outlet manifold (05) is connected with the outlet manifold (07) The left end adopts butt welding connection, the right end of the bypass manifold (06) and the left end of the outlet manifold (07) adopt butt welding connection; the power assembly consists of flange II (031), power tool (032), cardan shaft (033) , tailpipe (034), the flange II (031) is connected with the right end of the main inlet valve (024) by a bolt group, the right end of flange II (031) is connected with the left end of the power tool (032) by threads; the power tool ( 032) is a screw motor. The screw motor is composed of a screw motor casing, a rubber bushing, and a screw motor rotor. The left end of the screw motor casing is connected to the right end of flange II (031) by threads, and the right end of the screw motor casing is connected to the left end of the tail pipe (034). Threaded connection, the right end of the screw motor rotor and the left end of the cardan shaft (033) are threaded; a socket hole (035) is provided in the middle of the tail pipe (034); the generator assembly (04) is composed of a transmission shaft (041), a centripetal Thrust bearing (042), bearing left end cover (044), bearing right end cover (044), bearing protection sleeve (043), flange III (046), flange IV (047), generator (048); transmission shaft The left end of (041) is threadedly connected to the right end of the cardan shaft (033); the radial thrust bearing (042) is installed at the left and right ends of the external steps of the transmission shaft (041); the bearing protection sleeve (043) is installed on the radial thrust bearing (042) outside, the bearing protection sleeve (043) is provided with an oil injection hole; the inner cavity of the right part of the flange III (046) and the left end of the bearing protection sleeve (043) are connected by socket welding, and the flange III (046) is connected with the tail pipe ( 034) The right end step is connected by a bolt group; the left inner cavity of flange IV (047) and the right end of the bearing protective sleeve (043) are connected by socket welding; the left end cover of the bearing (044) is installed in the left inner cavity of flange III (046), The left end cover of the bearing (044) is connected with the inner cavity of the left part of the flange III (046) by a screw set; 047) The inner cavity on the right is connected by a screw group; the generator (048) is composed of a generator rotor, a magnetic steel, an isolation sleeve, a coil, a generator casing, and a generator end cover. The right part of the generator rotor and the transmission shaft (041) is connected by a key, the magnetic steel is installed on the generator rotor, the spacer sleeve is installed outside the generator rotor, the coil is wound in the generator casing, and the left end of the generator casing is connected to the flange IV (047 ) are connected by screw sets, and the space between flange IV (047) and the isolation sleeve is sealed with a rubber sealing ring, and the isolation sleeve is made of non-magnetic material.