Lifting tool and method for dual-fuel diesel engine cylinder block

Abstract

A lifting fixture and method for a dual-fuel diesel engine cylinder block, the cylinder block is provided with a Gland hole, the lifting fixture includes a shaft, a bracket, a lifting lug, a spring, a steel ball and a nut; wherein the bracket is provided with a bearing surface, a positioning surface and a conical guide surface, the bracket is provided with an arc guide groove, the center and both side ends of the arc guide groove are respectively provided with a semi-spherical groove, the outer side surface of the sleeve is provided with a cylindrical blind hole, the shaft and the nut hinge the bracket and the lifting lug together so that they can rotate relative to each other, the spring and the steel ball are arranged in the cylindrical blind hole, under the action of the spring, the steel ball respectively penetrates into the three semi-spherical grooves, and the bracket and the lifting lug are respectively locked in three different relative positions; the guide surface of the bracket guides the positioning surface to enter the Gland hole and achieve automatic centering, the bearing surface is attached to the end face of the Gland hole, so that the lifting fixture and the steel wire rope are on the same vertical line with the center of gravity of the cylinder block, and the cylinder block is automatically positioned and smoothly lifted. The present invention has the functions of automatic centering and self-locking, improves production efficiency, eliminates safety hazards, and improves working conditions.

Description

Technical Field

[0001] The invention relates to the handling of large diesel engine parts, in particular to a lifting tool and method for a dual-fuel diesel engine cylinder body, belonging to the technical field of lifting. Background Art

[0002] The cylinder block of the WinGD 12X92-DF large dual-fuel low-speed diesel engine is the main part of the engine, consisting of 12 single cylinders and 1 intermediate cylinder, each of which weighs about 23 tons. There is currently no special tooling and method for rapid loading and unloading and smooth lifting of the single cylinder of the cylinder block during machining, assembly and transportation. Figure 7 The traditional lifting method currently used is to manually assist the steel wire rope C to pass through the O-shaped hole A1 on the connecting surface of the two sides of the cylinder body or the waist-shaped door frame A2 on the exhaust side and the cam side for lifting. When the cylinder body A is lifted, the steel wire rope C is squeezed and sheared by the sharp edge of the O-shaped hole A1 or the waist-shaped door frame A2 under the action of the gravity of the cylinder body A. Under the action of the shear force, there is a safety hazard that the steel wire rope C may be cut off; in addition, due to the large volume of the cylinder body A and the unstable center of gravity during lifting, it is easy to cause relative sliding and shaking of the cylinder body A and the steel wire rope C, which also poses a safety hazard; at the same time, the lifting operation of the crane operator has high labor intensity and low production efficiency. Summary of the invention

[0003] The main purpose of the present invention is to overcome the shortcomings of the traditional method of lifting the cylinder block of a large diesel engine, and to provide a simple, efficient, safe and convenient lifting tool and method for the cylinder block of a dual-fuel diesel engine according to the structural characteristics of the cylinder block, so as to avoid direct contact between the wire rope and the cylinder block during the lifting process, prevent accidents caused by the sharp edges of the cylinder block squeezing and shearing the wire rope, and eliminate the shaking of the cylinder block due to unstable center of gravity caused by bending deformation and relative sliding of the wire rope during lifting.

[0004] To achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A lifting fixture for a dual-fuel diesel engine cylinder block, the cylinder block is a box-type part, the upper plane is provided with a Gland hole, the lower plane is provided with a cylinder liner hole coaxial with the Gland hole, and the center of gravity of the cylinder block is on the axis line of the Gland hole and the cylinder liner hole; the feature is that the lifting fixture is suspended on a steel wire rope and connected to the cylinder block, and comprises a shaft, a bracket, a lifting lug and a nut;

[0006] The bracket is a symmetrical hollow frame-type component, with horizontal supporting surfaces and positioning surfaces erected on the supporting surfaces at the front and rear sides, the arc surface of the positioning surface matches the inner wall of the Gland hole, and a raised conical guide surface is provided above the positioning surface, the guide surface corresponds to the Gland hole to play an automatic centering role, and circular rings are provided on the left and right sides of the bracket, and the circular rings are provided with shaft holes; the lifting ear includes a rib plate and a shaft sleeve, the rib plate is provided with a lifting hole, and the shaft sleeve is provided with a center hole; the shaft and the nut pass through the shaft hole of the circular ring sleeve and the center hole of the shaft sleeve to hinge the bracket and the lifting ear together so that they can rotate relatively;

[0007] The guide surface of the bracket guides the positioning surface to enter the Glan hole and achieve automatic centering, and the supporting surface of the bracket fits the end surface of the Glan hole, so that the lifting tool and the wire rope are on the same vertical line with the center of gravity of the cylinder body, realizing automatic positioning and smooth lifting of the cylinder body.

[0008] Furthermore, the lifting tool also includes a spring and a steel ball; arc guide rail grooves are provided on the relative inner sides of the circular ring sleeve of the bracket, and a hemispherical groove is respectively provided at the center and both side ends of the arc guide rail groove; a cylindrical blind hole is respectively provided on the two outer sides of the shaft sleeve, and the position of the cylindrical blind hole corresponds to the arc guide rail groove on the circular ring sleeve; the spring and steel ball are arranged in the cylindrical blind hole from the inside to the outside in sequence, and the steel ball can respectively protrude into the three hemispherical grooves on the inner side of the bracket; under the action of the spring, the relative position between the bracket and the lifting ear is locked at three different positions respectively.

[0009] Furthermore, the magnitude of the locking force between the relative positions of the bracket and the lifting ear depends on the magnitude of the elastic force of the spring.

[0010] Furthermore, the depth of the hemispherical groove is greater than the depth of the arc guide groove, but less than the radius of the steel ball.

[0011] Another technical solution of the present invention to solve the technical problem is:

[0012] A method for lifting a dual-fuel diesel engine cylinder block using the above-mentioned lifting tool comprises the following steps:

[0013] 1) Rotate the lifting lug and the bracket to form an oblique angle with each other, so that the relative position of the two is locked at the position where the steel ball is embedded in the hemispherical groove at the side end of the arc guide groove, and use a steel wire rope to pass the lifting tool through the Gland hole along the axis and put it into the cylinder body;

[0014] 2) Overcoming the locking force between the bracket and the lifting ear, rotating the bracket to a horizontal position and perpendicular to the lifting ear, locking the steel ball in the position of the hemispherical groove in the center of the arc guide groove;

[0015] 3) hanging the lifting tool along the axis of the Glan hole by a steel wire rope;

[0016] 4) The guide surface guides the positioning surface into the Gland hole, automatically centers the lifting fixture, and makes the supporting surface completely fit the end surface of the Gland hole, so that the lifting fixture and the wire rope are on the same vertical line with the center of gravity of the cylinder body, and the cylinder body is lifted;

[0017] 5) After the cylinder body is hoisted to the predetermined location, the bracket and the lifting lug are relatively rotated so that the steel ball returns to the central hemispherical groove and locks the position, and then the lifting tool is lifted out of the Gland hole along the axis, thereby completing the lifting operation of the cylinder body.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) The lifting tooling of the present invention has a simple and compact structure, is safe and reliable, is easy to operate, labor-saving and efficient, and is easy to maintain.

[0020] 2) The lifting tool has strong versatility and can be applied to the lifting operation of a single cylinder of a large diesel engine cylinder block of various models.

[0021] 3) Since the lifting fixture adopts a locking mechanism composed of a steel ball, a spring, a hemispherical groove and an arc guide groove, and uses a conical guide surface to automatically guide the lifting fixture into position, it has self-locking and automatic centering functions, thereby greatly reducing the difficulty of lifting operations, simplifying the operation process, reducing labor intensity, improving working conditions, and improving production efficiency.

[0022] 4) The present invention can avoid bending deformation and relative sliding of the wire rope, prevent the cylinder body from shaking due to unstable center of gravity, avoid the safety hazard of the wire rope being cut off due to shear force, extend the service life of the wire rope, achieve smooth and safe lifting, and improve the safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the component decomposition of the structure of the present invention.

[0024] Figure 2 yes Figure 1 Enlarged view of part D.

[0025] Figure 3 yes Figure 1 E-direction view.

[0026] Figure 4 It is a three-dimensional schematic diagram of the structure of the present invention.

[0027] Figure 5 yes Figure 4 HH cross-section diagram.

[0028] Figure 6 yes Figure 5 Enlarged view of part F.

[0029] Figure 7 It is a schematic diagram of the lifting state of the present invention.

[0030] Figure 8 It is an operation step diagram of the lifting method of the present invention.

[0031] Fig. 9 yes Figure 8 Enlarged view of the P part.

[0032] Fig.10 It is a semi-axle side cross-sectional schematic diagram of the lifting step 4) of the present invention.

[0033] In the figure:

[0034] A—cylinder body, B—lifting tooling, C—wire rope, A1—O-type hole, A2—waist-shaped door frame, A3—Glan hole, A3-1—Glan hole inner wall, A3-2—Glan hole end face, B1—shaft, B2—bracket, B3—lifting ear, B4—nut, B5—spring, B6—steel ball, B2-1—guide surface, B2-2—positioning surface, B2-3—bearing surface, B2-4—circular ring sleeve, K—cylindrical blind hole, U—hemispherical groove, V—hemispherical groove, W—hemispherical groove. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but this should not be used to limit the protection scope of the present invention.

[0036] The lifting tool B of the present invention is used for lifting the cylinder block of a dual-fuel diesel engine. Figure 7 The cylinder block A is a box-type part, with a glan hole A3 on the upper plane and a cylinder liner hole on the lower plane. The glan hole A3 is coaxial with the cylinder liner hole. Fig.10 , the center of gravity of the cylinder body A is on the axis G of the two holes. The lifting fixture B is connected to the cylinder body A and is suspended on the wire rope C together with the cylinder body A. The present invention makes full use of the structural characteristics of the cylinder body A, adopts the lifting fixture B whose shape matches the inner wall A3-1 of the Glan hole, and transforms the lifting operation of the cylinder body A with irregular shape originally tied with the wire rope C into lifting the parts with the wire rope C, the lifting fixture B and the center of gravity G of the cylinder body A on the same vertical line.

[0037] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown in the figure, the lifting tool B of the cylinder body is suspended at the lower end of the wire rope C, including a shaft B1, a bracket B2, a lifting ear B3, a nut B4, two springs B5 and two steel balls B6.

[0038] See also Figure 4 The bracket B2 is a hollow rectangular frame-type component with a symmetrical structure; horizontal step-type supporting surfaces B2-3 are provided on the front and rear sides of the rectangular frame as supporting surfaces for the cylinder body A during lifting; a vertical arc-shaped positioning surface B2-2 is provided on the inner side of the supporting surface B2-3, and the positioning arc surface of the positioning surface B2-2 coincides with the inner wall of the Gland hole A3; a raised conical guide surface B2-1 is provided above the positioning surface B2-2, and the guide surface B2-1 corresponds to the Gland hole A3, and can play an automatic centering role for the cylinder body A during lifting.

[0039] A circular ring sleeve B2-4 is provided on each of the left and right sides of the rectangular frame of the bracket B2, and a shaft hole for connecting the shaft B1 is provided in the center of the circular ring sleeve B2-4. Figure 1 and Figure 3 , arc guide grooves are provided on the opposite inner sides of the two circular ring sleeves B2-4, a hemispherical groove V is provided in the center of the arc guide groove, and hemispherical grooves U and W are provided on both side ends; the depths of the hemispherical grooves U, V and W are greater than the depth of the arc guide groove, but less than half the diameter of the steel ball B6.

[0040] See also Figure 1 The lifting lug B3 is an integral component consisting of an upper rib plate and a cylindrical sleeve connected to the lower part of the rib plate. The rib plate is provided with a circular lifting hole for connecting a wire rope. The sleeve is provided with a central hole for passing the shaft B1. The two outer sides of the sleeve are each provided with a cylindrical blind hole K. The position of the cylindrical blind hole K corresponds to the arc guide groove on the annular sleeve B2-4 of the bracket B2. Please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The spring B5 is arranged in the cylindrical blind hole K and one end thereof resists the bottom of the cylindrical blind hole K. The steel ball B6 is installed on the outside of the spring B5 and protrudes out of the opening of the cylindrical blind hole K.

[0041] One end of the shaft B1 is in the shape of a hexagonal nut, and the other end is provided with a thread. The shaft B1 is inserted into the shaft hole of the annular sleeve B2-4 of the bracket B2 and the center hole of the shaft sleeve of the ear B3, so that the bracket B2 and the ear B3 are rotatably hinged together, and the bracket B2 and the ear B3 can rotate around the shaft B1 and perform relative rotational motion. The nut B4 is connected to one end of the shaft B1.

[0042] The two steel balls B6 can respectively penetrate into the hemispherical groove U, hemispherical groove V or hemispherical groove W on the inner side of the bracket B2, and half of them remain in the cylindrical blind hole K of the ear B3. Under the action of the elastic force of the spring B5, the relative position between the bracket B2 and the ear B3 is locked at the three positions respectively. The magnitude of the elastic force of the spring B5 determines the magnitude of the locking force (rotational torque). When the ear B3 and the bracket B2 rotate relative to each other around the axis B1, the steel ball B6 is separated from the hemispherical groove, and the spring B5 is compressed under the extrusion of the circular arc guide groove, and rolls along the circular arc guide groove under the action of the rotational torque until it falls into another hemispherical groove, reaching a new position lock.

[0043] See also Figure 8 The lifting method of the dual-fuel diesel engine cylinder block using the lifting tool comprises the following steps:

[0044] 1) Rotate the lifting lug B3 and the bracket B2 relative to each other so that their relative positions are locked at the position where the steel ball B6 is embedded in the hemispherical groove W or the hemispherical groove U, that is, the lifting lug B3 and the bracket B2 form an oblique angle; connect the lifting lug B3 of the lifting tool with the wire rope C, and insert it into the cylinder body A from top to bottom through the Gland hole A3 of the cylinder body A along the axis line of the Gland hole A3.

[0045] 2) The crane operator overcomes the locking force between the bracket B2 and the lifting ear B3 through the O-shaped hole A1 of the cylinder body A or the waist-shaped door frame A2, and manually rotates and adjusts the bracket B2 to a horizontal position and locks it, that is, the bracket B2 and the lifting ear B3 are perpendicular to each other and locked in the position where the steel ball B6 is embedded in the hemispherical groove V.

[0046] 3) slowly lift the lifting tool B along the axis of the Glancon A3 through the steel wire rope C;

[0047] 4) Please refer to Fig. 9 When the guide surfaces B2-1 on the front and rear sides of the lifting fixture B enter the Glan hole A3, they play a guiding role, so that the positioning surface B2-2 enters the inner wall A3-1 of the Glan hole and quickly and automatically centers, and finally the supporting surface B2-3 of the lifting fixture B completely fits the Glan hole end surface A3-2; ​​at this time, the wire rope C and the center of gravity G of the lifting fixture B and the cylinder body A are exactly on the same vertical line, please refer to Fig.10 , the cylinder body A can be lifted.

[0048] 5) After the cylinder block A is hoisted to the predetermined location, the hoisting tool B is lowered along the axis of the Gland hole A3, and then the bracket B2 and the lifting ear B3 are relatively rotated so that the steel ball B6 returns to the original hemispherical groove U or hemispherical groove W and locks the position, and then the hoisting tool B is hoisted out of the Gland hole A3 along the axis, thereby completing the hoisting operation of the cylinder block A.

[0049] The present invention adopts a mechanism composed of a steel ball, a spring, a hemispherical groove and an arc guide groove to achieve position locking of the lifting fixture, avoiding the safety hazard caused by the free rotation of the lifting fixture, and simultaneously utilizes a conical guide surface to automatically guide the lifting fixture to position in the Gland hole, thereby greatly simplifying the operating procedure, and transforming the original method of directly lifting the cylinder body with a steel wire rope into lifting using a fixture, thereby achieving the purpose of simple, convenient and safe lifting operation.

[0050] The present invention significantly reduces the labor intensity of the operator on the one hand, and improves production efficiency on the other hand, making the operation safer, eliminating potential safety hazards, and achieving the effects of rapid positioning and loading and unloading of tooling and stable lifting of the cylinder body.

[0051] The protection scope required by the present invention is not limited to the above-mentioned embodiments, but should also include other obvious changes and alternatives to the present invention. All equivalent changes and modifications made according to the contents of the present invention belong to the scope of the present invention.

Claims

1. A lifting method for a dual-fuel diesel engine cylinder block, wherein the cylinder block is a box-type part, the upper plane is provided with a Gland hole, the lower plane is provided with a cylinder liner hole coaxial with the Gland hole, and the center of gravity of the cylinder block is on the axis line of the Gland hole and the cylinder liner hole; characterized in that: The lifting method is to suspend the lifting tool on the wire rope and connect it to the cylinder body, and the lifting tool includes a shaft, a bracket, a lifting lug, a nut, a spring and a steel ball; The bracket is a symmetrical hollow frame-type component, with horizontal supporting surfaces and positioning surfaces erected on the supporting surfaces at the front and rear sides, the arc surface of the positioning surface matches the inner wall of the Gland hole, and a raised conical guide surface is provided above the positioning surface, the guide surface corresponds to the Gland hole to play an automatic centering role, and circular rings are provided on the left and right sides of the bracket, and the circular rings are provided with shaft holes; the lifting ear includes a rib plate and a shaft sleeve, the rib plate is provided with a lifting hole, and the shaft sleeve is provided with a center hole; the shaft and the nut pass through the shaft hole of the circular ring sleeve and the center hole of the shaft sleeve to hinge the bracket and the lifting ear together so that they can rotate relatively; An arc guide groove is provided on the relative inner side surfaces of the annular sleeve of the bracket, and a hemispherical groove is respectively provided at the center and both side ends of the arc guide groove, and a cylindrical blind hole is respectively provided on the two outer side surfaces of the shaft sleeve, and the position of the cylindrical blind hole corresponds to the arc guide groove on the annular sleeve, and the spring and the steel ball are sequentially arranged in the cylindrical blind hole from the inside to the outside, and the steel ball can respectively protrude into the three hemispherical grooves on the inner side surface of the bracket, and under the action of the spring, the relative position between the bracket and the lifting ear is locked at three different positions respectively; The guide surface of the bracket guides the positioning surface to enter the Glan hole and achieve automatic centering, and the support surface of the bracket fits the end surface of the Glan hole, so that the lifting tool and the wire rope are on the same vertical line with the center of gravity of the cylinder body, realizing automatic positioning and stable lifting of the cylinder body; The lifting method comprises the following steps: 1) Rotate the lifting lug and the bracket to form an oblique angle with each other, so that the relative position of the two is locked at the position where the steel ball is embedded in the hemispherical groove at the side end of the arc guide groove, and use a steel wire rope to pass the lifting tool through the Gland hole along the axis and put it into the cylinder body; 2) Overcoming the locking force between the bracket and the lifting ear, rotating the bracket to a horizontal position and perpendicular to the lifting ear, locking the steel ball in the position of the hemispherical groove in the center of the arc guide groove; 3) hanging the lifting tool along the axis of the Glan hole by a steel wire rope; 4) The guide surface guides the positioning surface into the Gland hole, automatically centers the lifting fixture, and makes the supporting surface completely fit the end surface of the Gland hole, so that the lifting fixture and the wire rope are on the same vertical line with the center of gravity of the cylinder body, and the cylinder body is lifted; 5) After the cylinder body is hoisted to the predetermined location, the bracket and the lifting ear are rotated relative to each other so that the steel ball returns to the hemispherical groove at the side end of the arc guide groove and is locked in position, and then the lifting tool is lifted out of the Gland hole along the axis, thereby completing the lifting operation of the cylinder body.

2. The lifting method for a dual-fuel diesel engine cylinder block according to claim 1, characterized in that: The magnitude of the locking force between the bracket and the hanging ear relative to each other depends on the magnitude of the elastic force of the spring.

3. The lifting method for a dual-fuel diesel engine cylinder block according to claim 1, characterized in that: The depth of the hemispherical groove is greater than the depth of the arc guide groove, but less than the radius of the steel ball.

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