CN218991694U

CN218991694U - BPRT unit high efficiency low pressure jar last stage blade

Info

Publication number: CN218991694U
Application number: CN202223284260.5U
Authority: CN
Inventors: 张旭阳
Original assignee: Wuxi Dingyuan Precision Machinery Co ltd
Current assignee: Wuxi Dingyuan Precision Machinery Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-05-09
Anticipated expiration: 2032-12-08

Abstract

The utility model provides a high-efficiency low-pressure cylinder final stage blade of a BPRT unit, which comprises a device main body and a multifunctional protection mechanism. This high-efficient low pressure jar last stage blade of BPRT unit, including the device back lid, the connection recess, connect the lug, the blade, dehumidification baffle, guiding gutter and tungsten carbide coating set up, when needs use the high-efficient low pressure jar last stage blade of BPRT unit, the connection recess of lid behind the device is put into to the connection lug that will be connected with the blade, the setting of draw-in groove connection is convenient for replace under the circumstances that the blade takes place wearing and tearing, the blade is for using heat-resisting stainless steel material, when steam temperature appears great little water droplet or water droplet, when striking the blade surface, the guiding gutter on dehumidification baffle surface is little water droplet or water droplet drainage, guaranteed the dehumidification effect of dehumidification baffle, tungsten carbide coating has increased blade surface hardness, the blade is corrosion-resistant, the wearability is improved, make the blade anti water erosion ability promote, the life of extension blade.

Description

BPRT unit high efficiency low pressure jar last stage blade

Technical Field

The utility model relates to the technical field of low-pressure cylinder final-stage blades, in particular to a high-efficiency low-pressure cylinder final-stage blade of a BPRT unit.

Background

The steam turbine is also called a steam turbine engine, and is a rotary steam power device, high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a rotor provided with a blade row rotates and simultaneously does work outwards. The turbine is a main device of a modern thermal power plant, and is also used in metallurgical industry, chemical industry and ship power plants, the last stage blade of the turbine is a core component of the turbine, particularly for a high-capacity turbine, which represents the technical level of the turbine, the blade is one of key parts of the turbine, and along with the large capacity of the turbine of the power plant, the safety and reliability of the blade and the maintenance of high efficiency are particularly important, so that the last stage blade of a high-efficiency low-pressure cylinder of a BPRT unit is particularly needed.

However, in the using process of the final stage blade of the high-efficiency low-pressure cylinder of the conventional BPRT unit, continuous dense small water drops or water drops appear due to the fact that the temperature of water vapor in the device is high, the surface of the final stage blade can be corroded in the running process of the device, and the working efficiency of the device and the safety of the device can be affected after the blade is corroded by water.

Disclosure of Invention

The utility model aims to provide a high-efficiency low-pressure cylinder final stage blade of a BPRT unit, which aims to solve the problems that in the prior art, the working efficiency of the device is affected and the safety of the device is affected due to the fact that continuous dense small water drops or water drops appear due to the fact that the temperature of water vapor in the device is large in the use process, the surface of the final stage blade is corroded in the operation process of the device, and the working efficiency of the device is affected after the blade is corroded by water.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a BPRT unit high efficiency low pressure jar last stage blade, includes device main part and multi-functional protection machanism, and multi-functional protection machanism includes lid, connection recess, connection lug, blade, dehumidification baffle, hydrophobic groove and tungsten carbide coating behind the device, the outside of device main part is provided with multi-functional protection machanism, the inboard of device main part is provided with the retainer plate.

Preferably, the multifunctional protection mechanism comprises a device rear cover, a connecting groove, a connecting lug, a blade, a dehumidifying partition, a water drain tank and a tungsten carbide coating, wherein the rear end of the device main body is provided with the device rear cover, the inner side of the device rear cover is provided with the connecting groove, the upper end of the connecting groove is provided with the connecting lug, one side of the connecting lug is connected with the blade, the outer side of the blade is provided with the dehumidifying partition, the surface of the dehumidifying partition is provided with the water drain tank, and one side of the dehumidifying partition is provided with the tungsten carbide coating.

Preferably, the connecting convex blocks are connected with the connecting grooves through clamping grooves, and the connecting convex blocks are matched with the connecting grooves in size.

Preferably, the blade is made of heat-resistant stainless steel, and the blade and the connecting lug are welded.

Preferably, the high-efficiency low-pressure cylinder final stage blade of the BPRT unit is characterized in that the hydrophobic grooves are uniformly distributed on the dehumidifying partition plate, and the dehumidifying partition plate is tightly attached to the blade.

Preferably, the tungsten carbide coating is tightly attached to the blade, and the size of the tungsten carbide coating is smaller than that of the blade.

Preferably, the fixing ring is connected with the device main body through a screw, and the outer diameter of the fixing ring is matched with the inner diameter of the device main body.

Compared with the prior art, the utility model has the beneficial effects that; when a BPRT unit high-efficiency low-pressure cylinder last-stage blade is needed, the connecting convex blocks connected with the blade are placed in the connecting grooves of the rear cover of the device, the clamping grooves are connected so as to be convenient to replace under the condition that the blade is worn, the blade is made of heat-resistant stainless steel, the heat-resistant stainless steel has good corrosion resistance, a layer of compact and stable oxidation protection film can be formed on the surface of the blade to protect the blade, small water drops or water drops appear at a large steam temperature, when the surface of the blade is impacted, the water drain grooves on the surface of the dehumidifying partition board are used for draining the small water drops or the water drops, the dehumidifying effect of the dehumidifying partition board is guaranteed, the tungsten carbide coating increases the surface hardness of the blade, the corrosion resistance and the wear resistance of the blade are improved, the water erosion resistance of the blade is improved, and the service life of the blade is prolonged.

Drawings

FIG. 1 is a schematic view of the overall appearance structure of the present utility model;

FIG. 2 is a schematic view of the mating structure of the connection bumps and blades of the present utility model;

FIG. 3 is a schematic view of the interaction structure of the vane, dehumidifying partition, water-repellent tank and tungsten carbide coating of the present utility model;

fig. 4 is a schematic diagram of the mutual matching structure of the rear cover and the connecting groove of the device.

In the figure: 1. a device body; 201. a device rear cover; 202. a connection groove; 203. a connection bump; 204. a blade; 205. dehumidifying partition; 206. a water drain tank; 207. a tungsten carbide coating; 3. and (5) fixing rings.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a BPRT unit high efficiency low pressure jar last stage blade, includes device main part 1 and multi-functional protection machanism, and multi-functional protection machanism includes device back lid 201, coupling groove 202, coupling lug 203, blade 204, dehumidification baffle 205, hydrophobic groove 206 and tungsten carbide coating 207, and the outside of device main part 1 is provided with multi-functional protection machanism, and the inboard of device main part 1 is provided with retainer plate 3.

Further, the multifunctional protection mechanism comprises a device rear cover 201, a connecting groove 202, a connecting lug 203, a blade 204, a dehumidifying partition 205, a hydrophobic groove 206 and a tungsten carbide coating 207, wherein the rear end of the device main body 1 is provided with the device rear cover 201, the connecting groove 202 is arranged on the inner side of the device rear cover 201, the connecting lug 203 is arranged at the upper end of the connecting groove 202, the blade 204 is connected to one side of the connecting lug 203, the dehumidifying partition 205 is arranged on the outer side of the blade 204, the hydrophobic groove 206 is arranged on the surface of the dehumidifying partition 205, the tungsten carbide coating 207 is arranged on one side of the dehumidifying partition 205, when a BPRT unit high-efficiency low-pressure cylinder final blade is needed, the connecting lug 203 connected with the blade 204 is placed into the connecting groove 202 of the device rear cover 201, the clamping groove is convenient to replace under the condition that the blade 204 is worn, the blade 204 is made of a heat-resistant stainless steel material, the heat-resistant stainless steel material has good corrosion resistance, a compact and stable oxidation protection film is formed on one side of the surface of the connecting lug 203, the blade is protected by the blade, the surface of the blade has a small water drop resistance or the water drop resistance of the blade 205, when the surface of the blade 205 is large in steam temperature, the water drop resistance of the blade 205 is prolonged, the water drop resistance of the blade 204 is prolonged, and the water drop resistance of the blade 204 is guaranteed.

Further, the connection protrusion 203 is connected with the connection groove 202 through a clamping groove, the connection protrusion 203 is matched with the connection groove 202 in size, and the clamping groove is connected with the blade 204 in a convenient mode to replace the blade 204 when the blade is worn.

Further, the blade 204 is made of heat-resistant stainless steel, the blade 204 and the connection bump 203 are welded, and the blade 204 is made of heat-resistant stainless steel, which has good corrosion resistance, and a dense and stable oxidation protection film is formed on the surface of the heat-resistant stainless steel, so that the blade is protected.

Further, the high-efficiency low-pressure cylinder final-stage blade of the BPRT unit is characterized in that the hydrophobic grooves 206 are uniformly distributed on the dehumidification partition plate 205, the dehumidification partition plate 205 is tightly attached to the blade 204, and the hydrophobic grooves 206 on the surface of the dehumidification partition plate 205 are used for draining small water drops or water drops, so that the dehumidification effect of the dehumidification partition plate 205 is guaranteed.

Further, the tungsten carbide coating 207 is tightly attached to the blade 204, the size of the tungsten carbide coating 207 is smaller than that of the blade 204, the surface hardness of the blade 204 is increased by the tungsten carbide coating 207, the corrosion resistance and the wear resistance of the blade 204 are improved, the water erosion resistance of the blade 204 is improved, and the service life of the blade 204 is prolonged.

Further, the fixing ring 3 is connected with the device main body 1 by a screw, the outer diameter of the fixing ring 3 is matched with the inner diameter of the device main body 1, and the device main body 1 and the device rear cover 201 are fixed by the fixing ring 3, so that the device main body 1, the blade 204 and the device rear cover 201 are integrated.

Working principle: firstly, when a BPRT unit high-efficiency low-pressure cylinder final stage blade is needed, a connecting lug 203 connected with a blade 204 is placed into a connecting groove 202 of a device rear cover 201, the connection of a clamping groove is convenient to replace under the condition that the blade 204 is worn, secondly, the blade 204 is made of heat-resistant stainless steel, the heat-resistant stainless steel has good corrosion resistance, a layer of compact and stable oxidation protection film is formed on the surface of the blade, the blade is protected, thirdly, when small water drops or water drops appear at a high steam temperature and impact the surface of the blade 204, a hydrophobic groove 206 on the surface of a dehumidifying baffle 205 is used for draining the small water drops, the dehumidifying effect of the dehumidifying baffle 205 is guaranteed, and fourthly, a tungsten carbide coating 207 increases the surface hardness of the blade 204, the corrosion resistance and the wear resistance of the blade 204 are improved, the service life of the blade 204 is improved, and finally, a fixing ring 3 is used for fixing the device main body 1 and the device rear cover 201, and the device main body 1, the blade 204 and the device rear cover 201 are made into a BPRT unit with high efficiency.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a BPRT unit high efficiency low pressure jar last stage blade, includes device main part (1) and multi-functional protection machanism, and multi-functional protection machanism includes lid (201), connection recess (202), connection lug (203), blade (204), dehumidification baffle (205), hydrophobic groove (206) and tungsten carbide coating (207), its characterized in that: the multifunctional protection mechanism is arranged on the outer side of the device main body (1), and the fixing ring (3) is arranged on the inner side of the device main body (1);

the multifunctional protection mechanism comprises a device rear cover (201), a connecting groove (202), a connecting lug (203), a blade (204), a dehumidifying partition plate (205), a hydrophobic groove (206) and a tungsten carbide coating (207), wherein the rear end of a device main body (1) is provided with the device rear cover (201), the connecting groove (202) is formed in the inner side of the device rear cover (201), the connecting lug (203) is arranged at the upper end of the connecting groove (202), the blade (204) is connected to one side of the connecting lug (203), the dehumidifying partition plate (205) is arranged on the outer side of the blade (204), the hydrophobic groove (206) is arranged on the surface of the dehumidifying partition plate (205), and the tungsten carbide coating (207) is arranged on one side of the dehumidifying partition plate (205).

2. The BPRT unit high-efficiency low-pressure cylinder last stage blade according to claim 1, wherein a clamping groove is formed between the connecting convex block (203) and the connecting groove (202), and the connecting convex block (203) is matched with the connecting groove (202) in size.

3. The BPRT unit high-efficiency low-pressure cylinder last-stage blade according to claim 1, wherein the blade (204) is made of heat-resistant stainless steel, and the blade (204) and the connecting lug (203) are welded.

4. The BPRT unit high efficiency low pressure cylinder last stage vane according to claim 1, wherein said water drain grooves (206) are uniformly distributed on a dehumidifying partition (205), and said dehumidifying partition (205) is tightly attached to the vane (204).

5. The BPRT assembly high efficiency low pressure cylinder last stage vane according to claim 1, wherein said tungsten carbide coating (207) is tightly adhered to the vane (204), and the size of said tungsten carbide coating (207) is smaller than the size of the vane (204).

6. The high-efficiency low-pressure cylinder final stage blade of the BPRT unit according to claim 1, wherein the fixing ring (3) is connected with the device main body (1) through screws, and the outer diameter of the fixing ring (3) is matched with the inner diameter of the device main body (1).