阅读说明：本技术 一种叶轮式风机的吊装工艺 (Lifting process of impeller type fan ) 是由 李宏龙 杨学 沈锋 吴春寒 郑马腾 于 2019-11-15 设计创作，主要内容包括：本发明涉及一种叶轮式风机的吊装工艺,具体包括以下步骤：(1)叶片吊装准备,(2)第一叶片吊装,(3)第二叶片吊装,(4)第三叶片吊装,(5)叶轮安装,本发明的一种叶轮式风机的吊装工艺通过使用主吊机和履带吊共同吊装叶片及叶轮,解决了现有的自升式风电安装平台无法进行大风力发电机的吊装作业的问题。(The invention relates to a lifting process of an impeller type fan, which specifically comprises the following steps: (1) the hoisting process of the impeller type fan comprises the steps of (1) blade hoisting preparation, (2) first blade hoisting, (3) second blade hoisting, (4) third blade hoisting and (5) impeller installation.)

1. A lifting process of an impeller type fan is characterized in that: the method specifically comprises the following steps:

(1) blade hoisting preparation

A. After the tower is transported by the tower transport ship, the tower is winched, the distance between the tower transport ship and the self-elevating platform is 200m, the blade transport ship is berthed and berthed on the ship, the berthed ship is close to the self-elevating platform through a mooring anchor, three blades are arranged on the blade transport ship, wherein the blade far away from the self-elevating platform is a first blade, the blade close to the self-elevating platform is a third blade, and the blade between the first blade and the third blade is a second blade;

B. the method comprises the following steps of installing an imaging leg tool on a self-elevating platform before hoisting, welding and fixing the imaging leg tool by adopting a set-square object leg tool, using a three-leg lifting tool on the top of a hub, transferring the hub and a hub transportation base to the imaging leg tool together, installing a positioning pin and a guide cover on a hub variable-pitch bearing, wherein three blade positioning points are distributed at equal angles on the hub, wherein the blade positioning point farthest away from a blade transportation ship is a first positioning point, and the blade positioning point is a second positioning point and a third positioning point in sequence in the clockwise direction of the first positioning point;

(2) first blade hoist and mount

After the preparation of blade hoisting is finished, starting to hoist the first blade, fixing the blade tip part of the first blade by using a crawler crane, fixing the blade root part of the first blade by using a main crane, simultaneously hoisting the blade root and the blade tip of the first blade by using the main crane and the crawler crane, anticlockwise rotating the blade tip of the first blade in the direction away from the blade transport ship by using the crawler crane, simultaneously anticlockwise rotating the blade root around a hub by using the main crane and moving the blade root to a first positioning point on the hub, and fixing the blade root of the first blade on the hub at the first positioning point;

(3) second blade hoist

After the first blade is hoisted, hoisting a second blade, fixing the blade root part of the first blade by using a crawler crane, fixing the blade tip part of the first blade by using a main crane, simultaneously hoisting the blade root and the blade tip of the first blade by using the main crane and the crawler crane, anticlockwise rotating the blade tip of the second blade by using the main crane, simultaneously anticlockwise rotating the blade root around the hub by using the crawler crane and moving the blade root to a second positioning point of the hub, and fixing the blade root of the second blade at the second positioning point on the hub;

(4) third blade hoist and mount

After the second blade is hoisted, hoisting a third blade, fixing the blade root part of the second blade by using a crawler crane, fixing the blade tip part of the second blade by using a main crane, simultaneously hoisting the blade root and the blade tip of the second blade by using the main crane and the crawler crane, rotating the blade tip of the third blade anticlockwise by using the main crane, simultaneously rotating the blade root clockwise around the hub by using the crawler crane and moving the blade root to a third positioning point of the hub, and fixing the blade root of the third blade at the third positioning point on the hub, thereby completing the installation of the impeller;

(5) impeller mounting

After the impeller is installed, the main crane is connected with a lifting point on the hub, the crawler crane is connected with a blade tip lifting point of the first blade, the main crane and the crawler crane horizontally lift the impeller to an installation position of an engine room, a lifting hook of the main crane is lifted slowly, a lifting hook of the crawler crane slowly descends to enable the impeller to be erected, the rotary crane butt-joints the impeller and the engine room, and the impeller is installed.

2. The hoisting process of the impeller type fan as claimed in claim 1, wherein: in the step A in the step (1), the purpose that the mooring ship approaches the self-elevating platform through the mooring anchor is to enable the safe distance between the blade transport ship and the self-elevating platform to be larger than or equal to 5 m.

3. The hoisting process of the impeller type fan as claimed in claim 1, wherein: and C, preparing before hoisting in the step B of the step (1), and checking the welding quality of the set square and checking and confirming whether a blade root flange of the blade has a positioning pin hole before hoisting each time.

4. The hoisting process of the impeller type fan as claimed in claim 1, wherein: in the first blade hoisting process in the step (2), the blade tip hoisting point is kept in the hoisting range of 21t @35m of the crawler crane, and the blade root hoisting point is kept in the range of 70t @70m of the main crane.

5. The hoisting process of the impeller type fan as claimed in claim 1, wherein: in the hoisting process of the second blade and the third blade respectively corresponding to the second blade and the third blade in the step (3) and the step (4), the blade root hoisting point is kept in the hoisting range of 21t @35m of the crawler crane, and the blade tip hoisting point is kept in the range of 70t @70m of the main crane.

6. The hoisting process of the impeller type fan as claimed in claim 1, wherein: and (4) after the impeller is installed, coating silica gel on the inner ring and the outer ring of the joint of the impeller hub and the main shaft, and coating a sealant on the outer ring of the joint of the impeller and the variable-pitch bearing.

7. The hoisting process of the impeller type fan as claimed in claim 1, wherein: the sum of the weight of the steel wire rope of the crawler crane and the weight of the blade hanging strip is 1t, and the weight of the hook head of the crawler crane is 2.5 t.

8. The hoisting process of the impeller type fan as claimed in claim 1, wherein: in the impeller hoisting process in the step (5), the maximum stress of the blade tip hoisting point of the first blade is within the turning radius of 21t @35m of the crawler crane, so that the hoisting capacity of the crane is met, the hub hoisting point is at the amplitude of 18m of the main crane, and the hoisting capacity of the main crane is 600 t.

9. The hoisting process of the impeller type fan as claimed in claim 1, wherein: the actual hoisting height of the impeller is 115.6 m.

Technical Field

The invention relates to the technical field of fan hoisting, in particular to a hoisting process of an impeller type fan.

Background

The wind power generator is an electric power device which converts wind energy into mechanical work, and the mechanical work drives a rotor to rotate so as to finally output alternating current. The wind-driven generator generally comprises wind wheels, a generator (including a device), a direction regulator (empennage), a tower, a speed-limiting safety mechanism, an energy storage device and other components.

The offshore wind driven generator needs a larger wind wheel to bear larger wind power along with the requirement of wind power generation, but the maximum lifting capacity of the self-elevating wind power installation platform in the prior art is only 600t, heavier wind wheel lifting can not be carried out, and the large wind driven generator can not be used indirectly.

Disclosure of Invention

The invention aims to solve the technical problem that a lifting process of an impeller type fan is provided to solve the problem that a self-elevating wind power installation platform in the prior art cannot carry out lifting operation of a large wind power generator.

In order to solve the technical problems, the technical scheme of the invention is as follows: the hoisting process of the impeller type fan is characterized by comprising the following steps: the method specifically comprises the following steps:

(1) blade hoisting preparation

A. After the tower is transported by the tower transport ship, the tower is winched, the distance between the tower transport ship and the self-elevating platform is 200m, the blade transport ship is berthed and berthed on the ship, the berthed ship is close to the self-elevating platform through a mooring anchor, three blades are arranged on the blade transport ship, wherein the blade far away from the self-elevating platform is a first blade, the blade close to the self-elevating platform is a third blade, and the blade between the first blade and the third blade is a second blade;

B. the method comprises the following steps of installing an imaging leg tool on a self-elevating platform before hoisting, welding and fixing the imaging leg tool by adopting a set-square object leg tool, using a three-leg lifting tool on the top of a hub, transferring the hub and a hub transportation base to the imaging leg tool together, installing a positioning pin and a guide cover on a hub variable-pitch bearing, wherein three blade positioning points are distributed at equal angles on the hub, wherein the blade positioning point farthest away from a blade transportation ship is a first positioning point, and the blade positioning point is a second positioning point and a third positioning point in sequence in the clockwise direction of the first positioning point;

(2) first blade hoist and mount

After the preparation of blade hoisting is finished, starting to hoist the first blade, fixing the blade tip part of the first blade by using a crawler crane, fixing the blade root part of the first blade by using a main crane, simultaneously hoisting the blade root and the blade tip of the first blade by using the main crane and the crawler crane, anticlockwise rotating the blade tip of the first blade in the direction away from the blade transport ship by using the crawler crane, simultaneously anticlockwise rotating the blade root around a hub by using the main crane and moving the blade root to a first positioning point on the hub, and fixing the blade root of the first blade on the hub at the first positioning point;

(3) second blade hoist

After the first blade is hoisted, hoisting a second blade, fixing the blade root part of the first blade by using a crawler crane, fixing the blade tip part of the first blade by using a main crane, simultaneously hoisting the blade root and the blade tip of the first blade by using the main crane and the crawler crane, anticlockwise rotating the blade tip of the second blade by using the main crane, simultaneously anticlockwise rotating the blade root around the hub by using the crawler crane and moving the blade root to a second positioning point of the hub, and fixing the blade root of the second blade at the second positioning point on the hub;

(4) third blade hoist and mount

After the second blade is hoisted, hoisting a third blade, fixing the blade root part of the second blade by using a crawler crane, fixing the blade tip part of the second blade by using a main crane, simultaneously hoisting the blade root and the blade tip of the second blade by using the main crane and the crawler crane, rotating the blade tip of the third blade anticlockwise by using the main crane, simultaneously rotating the blade root clockwise around the hub by using the crawler crane and moving the blade root to a third positioning point of the hub, and fixing the blade root of the third blade at the third positioning point on the hub, thereby completing the installation of the impeller;

(5) impeller mounting

After the impeller is installed, the main crane is connected with a lifting point on the hub, the crawler crane is connected with a blade tip lifting point of the first blade, the main crane and the crawler crane horizontally lift the impeller to an installation position of an engine room, a lifting hook of the main crane is lifted slowly, a lifting hook of the crawler crane slowly descends to enable the impeller to be erected, the rotary crane butt-joints the impeller and the engine room, and the impeller is installed.

Further, the purpose that the tower-barrel transport ship approaches the self-elevating platform through the anchor block in the step A in the step (1) is to enable the safe distance between the blade transport ship and the self-elevating platform to be greater than or equal to 5 m.

Further, the preparation before hoisting in the step (1) further comprises checking the welding quality of the set square and checking and confirming whether a blade root flange of the blade has a positioning pin hole before hoisting each time.

Further, in the first blade hoisting process in the step (2), the blade tip hoisting point is kept in the hoisting range of the crawler crane 21t @35m, and the blade root hoisting point is kept in the range of the main crane 70t @70 m.

Further, in the hoisting process of the second blade and the third blade respectively corresponding to the second blade and the third blade in the step (3) and the step (4), the blade root hoisting point is kept in the hoisting range of the crawler crane at 21t @35m, and the blade tip hoisting point is kept in the range of the main crane at 70t @70 m.

Further, after the impeller is installed in the step (4), silica gel is smeared on the inner ring and the outer ring of the joint of the hub and the main shaft, and sealant is smeared on the outer ring of the joint of the impeller and the variable-pitch bearing.

Furthermore, the sum of the weight of the steel wire rope of the crawler crane and the weight of the blade hanging strip is 1t, and the weight of the hook head of the crawler crane is 2.5 t.

Further, in the impeller hoisting process in the step (5), the maximum stress of the blade tip hoisting point of the first blade is within the turning radius of 21t @35m of the crawler crane, so that the hoisting capacity of the crane is met, the hub hoisting point is at the amplitude of 18m of the main crane, and the hoisting capacity of the main crane is 600 t.

Further, the actual hoisting height of the impeller is 115.6 m.

Compared with the prior art, the invention has the following beneficial effects:

according to the hoisting process of the impeller type fan, the main motor and the crawler crane are used for hoisting the blades and the impellers together, and the blades are installed and assembled in a mode of jointly hoisting the crawler crane and the main crane at sea, so that the problem of hoisting the impellers of the high-power offshore wind driven generator is solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the first blade in the impeller type fan hoisting process of the present invention.

Fig. 2 is a schematic diagram of the second blade in the impeller type fan hoisting process of the present invention.

Fig. 3 is a schematic view of the third blade in the impeller type fan hoisting process of the present invention.

Fig. 4 is a schematic view of the completion of impeller installation in the lifting process of the impeller type fan.

Fig. 5 is a schematic view of completion of impeller hoisting in the process of hoisting an impeller type fan according to the present invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described by the following detailed description.

The invention provides a hoisting process of an impeller type fan, which has the innovation points that: the method specifically comprises the following steps:

(1) blade hoisting preparation

A. And (3) after the tower barrel is transported by the tower barrel transport ship, the tower barrel is reamed to be away from the self-elevating platform by 200m, the blade transport ship is berthed and berthed, the berthed ship is close to the self-elevating platform through a mooring anchor, and the safety distance between the blade transport ship and the self-elevating platform is larger than or equal to 5 m. The blade transport ship is provided with three blades, wherein the blade far away from the self-elevating platform is a first blade, the blade close to the self-elevating platform is a third blade, and the blade between the first blade and the third blade is a second blade;

B. the method comprises the following steps of installing an imaging leg tool on a self-elevating platform before hoisting, welding and fixing the imaging leg tool by adopting a set-square object leg tool, using a three-leg lifting tool on the top of a hub, transferring the hub and a hub transportation base to the imaging leg tool together, installing a positioning pin and a guide cover on a hub variable-pitch bearing, wherein three blade positioning points are distributed at equal angles on the hub, wherein the blade positioning point farthest away from a blade transportation ship is a first positioning point, and the blade positioning point is a second positioning point and a third positioning point in sequence in the clockwise direction of the first positioning point; the preparation before hoisting further comprises the steps of checking the welding quality of the set square before each hoisting and checking and confirming whether a blade root flange of the blade has a positioning pin hole.

(2) First blade hoist and mount

After the preparation of blade hoisting is finished, the first blade is hoisted, the tip part of the first blade is fixed by using the crawler crane, the blade root part of the first blade is fixed by the main crane, the blade root and the blade tip of the first blade are hoisted simultaneously by the main crane and the crawler crane, the blade tip of the first blade is rotated anticlockwise in the direction away from the blade transport ship by the crawler crane, the blade root is rotated anticlockwise around the hub by the main crane and moved to a first positioning point on the hub as shown in fig. 1, the blade root of the first blade is fixed on the hub at the first positioning point, the blade tip hoisting point is kept in the hoisting range of the crawler crane 21t @35m, and the blade root hoisting point is kept in the range of the main crane 70t @70m in the first blade hoisting process.

(3) Second blade hoist

After the first blade is hoisted, the second blade starts to be hoisted, the blade root part of the first blade is fixed by using the crawler crane, the blade tip part of the first blade is fixed by the main crane, the blade root and the blade tip of the first blade are hoisted simultaneously by the main crane and the crawler crane, the blade tip of the second blade is rotated anticlockwise by the main crane, the blade root is rotated anticlockwise around the hub by the crawler crane and moved to the second positioning point of the hub, as shown in fig. 2, the blade root of the second blade is fixed at the second positioning point on the hub, in the hoisting process of the second blade root, the hoisting point of the second blade root is kept in the hoisting range of the crawler crane of 21t @35m, and the blade tip hoisting point is kept in the range of the main crane of 70t @70 m.

(4) Third blade hoist and mount

After the second blade is hoisted, hoisting a third blade, fixing the blade root of the second blade by using a crawler crane, fixing the blade tip of the second blade by using a main crane, simultaneously hoisting the blade root and the blade tip of the second blade by using the main crane and the crawler crane, rotating the blade tip of the third blade anticlockwise by using the main crane, simultaneously rotating the blade root clockwise around the hub by using the crawler crane and moving the blade root to a third positioning point of the hub, as shown in fig. 3, fixing the blade root of the third blade at the third positioning point on the hub, and thus completing the installation of the impeller, as shown in fig. 4, coating silica gel on the inner ring and the outer ring of the butt joint of the hub and the main shaft after the impeller is installed, and coating a sealant on the outer ring of the butt joint of the blade and the variable pitch bearing. In the process of lifting the third blade, the blade root lifting point is also kept in the lifting range of 21t @35m of the crawler crane, and the blade tip lifting point is kept in the range of 70t @70m of the main crane.

(5) Impeller mounting

After the impeller is installed, the main crane is connected with a lifting point on the hub, the crawler crane is connected with a blade tip lifting point of the first blade, the main crane and the crawler crane horizontally lift the impeller to a cabin installation position, a lifting hook of the main crane is lifted slowly, the lifting hook of the crawler crane slowly descends to enable the impeller to be erected, the main crane and the crawler crane butt-joint the impeller and the cabin to complete impeller installation, and the method is shown in fig. 5. In the impeller hoisting process, the maximum stress of the blade tip hoisting point of the first blade is within the turning radius of 21t @35m of the crawler crane, the hoisting capacity of the crane is met, the hub hoisting point is at the range of 18m of the main crane, and the hoisting capacity of the main crane is 600t at the moment. At the moment, the hoisting capacity of the main crane and the hoisting capacity of the crawler crane can hoist a high-power impeller (wind wheel) for hoisting operation, and preferably, the generator suitable for the wind wheel is a 7MW wind generator.

The sum of the weight of a steel wire rope of the crawler crane and the weight of a blade hanging strip in the hoisting process of the impeller type fan is 1t, and the weight of a hook head of the crawler crane is 2.5 t. The total elevation of the engine room and the tower barrel in the embodiment of the invention is as follows: 13 (foundation pile elevation) +21.12 (bottom tower height) +30 (middle tower height) +29.88 (upper tower height) +5.2 (cabin height) ═ 99.2 m. The impeller needs to be lifted up (above 1985 elevation): 99.2+10 (sling height) +2 (safety distance) 111.2 m. At the moment, the distance between the machine position and the main crane is 35m, the hoisting capacity is 400t, the hoisting height is more than the deck surface by 103m, and the actual hoisting height is as follows: 103+6 (air gap) +6.6 (plateau depth) ═ 115.6m > 111.2 m. Therefore, the main crane can be lifted to meet the requirement of lifting the impeller.

The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should fall into the protection scope of the present invention without departing from the design concept of the present invention, and the technical contents of the present invention as claimed are all described in the technical claims.