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CN-121990349-A - Automatic overturning device and method for cylinder block of marine diesel engine

CN121990349ACN 121990349 ACN121990349 ACN 121990349ACN-121990349-A

Abstract

The invention discloses an automatic overturning device and method for a marine diesel engine cylinder body, wherein the automatic overturning device for the marine diesel engine cylinder body comprises a pit, a supporting bracket, an overturning bracket and two driving components, the overturning bracket comprises two supporting frames which are vertically connected, the overturning bracket is provided with a first gesture that one outer wall of the supporting frame is in parallel butt joint with the supporting bracket and a second gesture that the other outer wall of the supporting frame is in parallel butt joint with the supporting bracket, the driving components comprise at least one hydraulic cylinder, one end of each hydraulic cylinder is rotatably arranged on the bottom surface of the pit through a supporting seat, the other end of each hydraulic cylinder penetrates through the supporting bracket and is hinged with the outer wall of the corresponding supporting frame, and the two driving components are matched to drive the overturning bracket to reciprocate between the first gesture and the second gesture. The driving assembly is simple in structure and convenient to control, the turnover device mechanism and the cylinder body mounting steps can be simplified, meanwhile, the situation that the surface of the cylinder body is damaged by pulling of the steel wire rope is avoided, and the operation efficiency and the product quality are improved.

Inventors

  • ZHANG WEI
  • CHEN QI
  • WANG HAO

Assignees

  • 上海中船三井造船柴油机有限公司

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. An automatic turning device of marine diesel engine cylinder block, characterized by comprising: a pit (1); A support bracket (2) placed on the ground and crossing over the pit (1); The turnover support (3) comprises two support frames (31) which are vertically connected, the inner sides of the two support frames (31) are respectively provided with a support surface which is suitable for supporting a cylinder block (5) to be processed, and the turnover support (3) is provided with a first gesture that the outer wall of one support frame (31) is in parallel butt joint with the support bracket (2) and a second gesture that the outer wall of the other support frame (31) is in parallel butt joint with the support bracket (2); two drive assembly (4), follow the length direction symmetry of support bracket (2) set up and with carriage (31) one-to-one, drive assembly (4) include at least one pneumatic cylinder (41), pneumatic cylinder (41) one end pass through supporting seat (11) rotate install in pit (1) bottom surface, the other end wear to locate support bracket (2) and with the outer wall of carriage (31) that corresponds articulates, two drive assembly (4) cooperation is in order to order about upset support (3) first gesture with reciprocal upset between the second gesture.
  2. 2. The automatic turning device of a marine diesel engine cylinder block according to claim 1, characterized in that the driving assembly (4) further comprises a controller, the supporting seat (11) is provided with a first angle sensor for detecting the rotation angle of the hydraulic cylinder (41), the turning bracket (3) is provided with a second angle sensor for detecting the rotation angle of the turning bracket (3), and the controller is respectively connected with the first angle sensor, the second angle sensor and the hydraulic cylinder (41) in a signal manner.
  3. 3. The automatic turning device for a marine diesel cylinder block according to claim 2, characterized in that the hydraulic cylinder (41) is a double-acting hydraulic cylinder.
  4. 4. The automatic turning device of a marine diesel engine cylinder block according to claim 2, wherein a center longitudinal beam (21) and a center cross beam (22) are arranged in the supporting bracket (2), the center longitudinal beam (21) and the center cross beam (22) are vertically and crosswise arranged, a hollowed-out part (23) for the hydraulic cylinder (41) to pass through is defined between the center longitudinal beam (21), the center cross beam (22) and the inner wall of the supporting bracket (2), and when the turning bracket (3) is in the first posture or the second posture, the outer wall of the turning bracket (3) is abutted with the center longitudinal beam (21) and the center cross beam (22).
  5. 5. The automatic turning device for a marine diesel engine cylinder block according to claim 2 or 4, wherein the outer wall of the joint of the two support frames (31) is a rounded corner structure.
  6. 6. The automatic turning device of a marine diesel engine cylinder block according to claim 2, characterized in that a nonmetallic protection piece (32) is arranged between the supporting surface and the diesel engine, and the nonmetallic protection piece (32) is fixedly connected with the supporting surface and is abutted with the cylinder block (5).
  7. 7. The automatic turning device for a marine diesel engine cylinder block according to claim 6, wherein the nonmetallic protective member (32) includes a plurality of sleepers that are provided extending in a length direction of the support frame (31), the plurality of sleepers being provided equidistantly in a width direction of the support frame (31).
  8. 8. The automatic turning device for a marine diesel engine cylinder block according to claim 7, wherein a lightening hole (33) is provided between two adjacent sleepers, the lightening hole (33) penetrating through the support frame (31) in a wall thickness direction of the support frame (31).
  9. 9. The automatic turning device for a marine diesel cylinder block according to claim 7, characterized in that the length of the sleeper is greater than the width or height of the cylinder block (5) in the length direction of the support bracket (2).
  10. 10. A marine diesel engine cylinder block automatic turning method performed by the marine diesel engine cylinder block automatic turning device according to any one of claims 2 to 9, comprising: Setting a flipping speed and activating the drive assembly (4); acquiring an angle signal detected by the second angle sensor, and calculating an expected angle after n seconds according to the angle signal and the overturning speed; -controlling the output pressure of the hydraulic cylinder (41) according to the desired angle.

Description

Automatic overturning device and method for cylinder block of marine diesel engine Technical Field The invention relates to the technical field of diesel engines, in particular to an automatic overturning device and method for a marine diesel engine cylinder block. Background The cylinder block is a large main body structural part of the marine low-speed diesel engine, the shape of the cylinder block is a cuboid structure, the length and the width of the cylinder block can reach 10m and 2m and 2.5 m respectively, the cylinder block is generally formed by a plurality of single cylinder segments and is generally made of spheroidal graphite cast iron materials, the weight of a single cylinder block of the large-model low-speed diesel engine can reach more than 30 tons, the weight of the whole cylinder block exceeds 100 tons, and the cylinder block is one of three large structural parts of the marine low-speed diesel engine and is used for bearing the installation of the rest parts of a plurality of diesel engines, and the processing precision requirement is high. When the cylinder body is produced, four planes and holes on the planes are required to be machined, the whole section of the cylinder body is generally machined on a numerical control floor type boring and milling machine, only one plane can be machined at a time, and when one plane is machined, the other plane is required to be turned over by 90 degrees. In the prior art, a crane and a steel wire rope are adopted to turn over a cylinder body, when the crane is hung on a crane lifting hook in a flat manner, two ends of the steel wire rope are penetrated oppositely from two sides of the cylinder body and are connected through shackles, protection is achieved by using a cloth covered sizing block at a finish machining plane and a corner, and the lifting hook stably ascends to lift the cylinder body. When the cylinder body is turned over, two pairs of steel wire rope main hooks are respectively hung on the traveling crane main hooks and the auxiliary hooks, steel wire ropes penetrate through flange holes on the side surfaces of the traveling crane main hooks and the auxiliary hooks respectively, the other side surface of the cylinder body is connected by using a shackle, the steel wire ropes hung on the auxiliary hooks are operated in the same way, and protection is achieved by using a cloth wrapping sizing block at the position where all the steel wire ropes are contacted with the finish machining surface of the cylinder body. Then the main hook slowly lifts, the auxiliary hook gradually descends in a matching way, one side of the cylinder body slowly inclines to the other side until the cylinder body turns over 90 degrees, and finally all wrapping cloth sizing blocks are removed to finish one-time turning. The plane after the cylinder body processing needs to avoid being strained by the wire rope in the overturning process, but adopts the current conventional cylinder body overturning mode, multiple overturning operations are needed in the cylinder body processing process, the cylinder body is a large-sized part, the weight of a single cylinder body is usually more than 100 tons, the diameter of the used wire rope is thick, the weight is heavy, and a great amount of physical effort is needed for threading the wire rope. The problem that the surface of a workpiece is damaged by a steel wire rope is difficult to avoid being damaged by pulling is easily caused in the overturning process of the cylinder body, so that quality defects are generated, the operation process is complex, and the requirement on hoisting operators is high. Disclosure of Invention The invention aims to provide an automatic overturning device for a marine diesel engine cylinder body, which is simple to operate and can not damage the surface of the cylinder body by pulling. The automatic overturning device for the marine diesel engine cylinder block comprises a pit, a supporting bracket, an overturning bracket and two driving components, wherein the supporting bracket is placed on the ground and spans over the pit, the overturning bracket comprises two vertically connected supporting frames, the inner sides of the two supporting frames are respectively provided with a supporting surface suitable for supporting the cylinder block to be processed, the overturning bracket is provided with a first gesture in which the outer wall of one supporting frame is in parallel abutting joint with the supporting bracket and a second gesture in which the outer wall of the other supporting frame is in parallel abutting joint with the supporting bracket, the two driving components are symmetrically arranged along the length direction of the supporting bracket and are in one-to-one correspondence with the supporting frames, each driving component comprises at least one hydraulic cylinder, one end of each hydraulic cylinder is rotatably installed on the bottom surface of the pit through a supporting sea