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CN-117125612-B - Large-scale hydraulic cylinder installation device and installation method at limited space

CN117125612BCN 117125612 BCN117125612 BCN 117125612BCN-117125612-B

Abstract

The installation device comprises a hanging ring, an adjustable support frame for installing the hanging ring and bridge supports for being pressed at two installation holes of a rotating frame in cooperation with a hinge shaft of an oil cylinder, wherein the adjustable support frame 1 comprises a support frame body, hanging rings are respectively arranged on the front side and the rear side of the support frame body, the bridge supports comprise bridge support frame bodies, a positioning seat for positioning the hinge shaft is arranged at one end part of a support arm, and a manual jack for pressing a bearing sleeve assembly is arranged at the end part of the other support arm. The installation device solves the problems of uncontrolled quality, low installation efficiency, hidden quality hazards in long-term use and the like caused by an assembly method of manual knocking in a limited space without effective stress points of the hydraulic cylinder of the large-scale hinge shaft installation structure. The oil cylinder installed by the method reduces the phenomena of seepage and oil leakage in the use process, lightens the labor intensity in the installation process, improves the assembly efficiency and reduces the potential safety hazard in the assembly operation process.

Inventors

  • LIU CAN
  • HU WEI
  • JIANG KUN
  • MAO XUELING
  • HE KANG
  • MA HUI
  • Zhou Zhenyue
  • ZHOU ZHENFENG
  • WU QIANG

Assignees

  • 中国兵器工业集团江山重工研究院有限公司

Dates

Publication Date
20260512
Application Date
20221212

Claims (10)

  1. 1. The method for installing the large hydraulic cylinder in the limited space is characterized by comprising the following steps of: a) Firstly hoisting an oil cylinder (8) to be installed by using an adjustable support frame (1), wherein the oil cylinder (8) is in an inclined state when being hoisted by the adjustable support frame (1), hoisting the adjustable support frame (1) to the installation position on a rotating frame beam integrally, locking the adjustable support frame (1) by using a locking screw (16) after centering a hinge shaft of the initially-adjusted oil cylinder and an installation hole (71), and arranging the oil cylinder (8) in the inner cavity of the rotating frame; the positioning seat (3) and a bearing sleeve assembly (6) to be installed are respectively preassembled in the installation holes (71) on the rotating frame beam; Hoisting a bridge support (2) on a rotary frame beam, clamping one support arm end part of the bridge support (2) with a positioning seat (3), enabling a jack (4) at the other support arm end part of the bridge support (2) to correspond to a bearing sleeve assembly (6), enabling a gap to be reserved between the jack (4) and the bearing sleeve assembly (6), enabling a hand-press jack (4) to pre-press the bearing sleeve assembly (6), enabling two support arms of the bridge support (2) to bear force, and enabling the bridge support (2) to be vertically arranged on the rotary frame beam; the height adjusting screw rod (15) on the adjustable support frame (1) is adjusted, one side hinge shaft of the oil cylinder (8) is completely dropped into the semicircular sleeve part (62) of the positioning seat (3), and after the other side hinge shaft is aligned with the center of the bearing hole, the jack (4) is pressed by hand, and the bearing sleeve assembly (6) is pressed in place; B) B, taking down a bridge support (2) and a positioning seat (3) from the lower part of an adjustable support frame (1), pre-installing another bearing sleeve component to be installed at a mounting hole of the positioning seat (3) in the step A, turning the bridge support (2) 180 degrees, clamping one support arm end part of the bridge support (2) with the bearing sleeve component (6) well installed in the step A, enabling a jack (4) at the other support arm end part of the bridge support (2) to correspond to the bearing sleeve component to be installed, enabling a gap to exist between the jack (4) and the bearing sleeve component to be installed, pre-pressing the bearing sleeve component (6) to be installed by a hand jack (4), enabling two support arms of the bridge support (2) to bear force, enabling the bridge support (2) to be vertically installed on a rotating frame beam, and enabling the hand jack (4) to press the bearing sleeve component (6) to be installed in place; C) After the piston rod earrings (81) of the oil cylinder (8) are pre-centered with the installation position (91) of the large lifting platform (9), the piston rod earrings (81) of the oil cylinder (8) are pre-assembled with the installation position (91) by using a tensioning centering shaft (5), the installation directions of the tensioning centering shaft (5) and a shaft required by a product are opposite, the shaft subjected to cold mounting sequentially penetrates into the installation position of the large lifting platform (9) from the chamfering end of the tensioning centering shaft (5), and the tensioning centering shaft (5) is ejected to complete the assembly of the oil cylinder (8).
  2. 2. The installation method of the large hydraulic cylinder at the limited space according to claim 1, wherein the adjustable support frame (1) comprises a support frame body, the support frame body comprises two support frame bodies (11), the two support frame bodies are connected into a whole through a hoisting beam, installation seats are respectively arranged at the upper ends of the two support frame bodies, a height adjusting screw (15) is arranged at the outer side of each installation seat, the end parts of the height adjusting screws (15) are connected with a rotary hoisting ring (14) and are used for hoisting a front sling (12) and a rear sling (13) of a cylinder barrel of the cylinder (8) to be installed at the limited space, two vertical plates are welded at one side supporting leg ends of the two support frame bodies, and locking screws (16) are arranged on the vertical plates at the outer side; The bridge type support (2) comprises a bridge type support frame body, wherein a positioning seat (3) for positioning a hinge shaft is arranged at one end part of a support arm, a jack (4) for pressing a bearing sleeve assembly (6) is arranged at the other end part of the support arm, the positioning seat (3) comprises a cylinder part at the outer end and a semicircular sleeve part (62) connected with the inner end of the cylinder part, a positioning cavity for positioning the hinge shaft is formed in the inner cavity of the semicircular sleeve part, a radially arranged partition plate (67) is arranged between the cylinder part and the semicircular sleeve part, a small screw rod (66) for disassembling the positioning seat is arranged on the partition plate, a positioning step is arranged at the end part of the support arm, and the cylinder part of the positioning seat (3) is clamped at the positioning step; The bearing sleeve assembly (6) comprises a bearing sleeve (65) and a bearing (61) with an inner cavity thereof being centered by a bearing positioning sleeve (63), the bearing (61) is arranged at an inner port of the bearing sleeve (65) through a retainer ring, a pressing plate (64) is clamped at an outer port of the bearing sleeve (65), and the pressing plate (64) is matched with the jack (4).
  3. 3. The method for installing the large hydraulic cylinder at the limited space according to claim 1, wherein two cylinders (8) are installed in an inner cavity of a rotating frame (7), the rotating frame (7) is installed on a frame body which is 1.7 m high from the ground, the size of a large lifting platform (9) is 3.2m x 2.4m, the load is 8-10 tons, the rotating frame (7) is installed on the large lifting platform (9), a cylinder barrel of the cylinder (8) is installed on the rotating frame (7) through a hinge shaft (82), a piston rod earring (81) is installed at an installation position (91) of the large lifting platform (9), the lifting function of the large lifting platform (9) is achieved through piston rod extension and retraction, the cylinder weight is 360kg, and the total length of the cylinder is 2600mm when a piston rod is fully extended.
  4. 4. The method for installing the large hydraulic cylinder at the limited space according to claim 1, wherein in the step B, the bridge type support (2) is vertically arranged on the rotating frame beam, whether the inner hole wall of the bearing and the outer circle of the hinge shaft are aligned or not is observed, if not, the height adjusting screw (15) is finely adjusted until the inner ring of the bearing is aligned with the hinge shaft, and after the alignment, the hand-press jack (4) presses the bearing sleeve assembly (6) to be installed in place.
  5. 5. A large hydraulic cylinder mounting device at the limited space suitable for the mounting method as claimed in claim 1, which is characterized by comprising an adjustable support frame (1) and bridge supports (2) which are used for being pressed at two mounting holes of a rotating frame (7) by matching with a hinge shaft of an oil cylinder (8); the adjustable support frame (1) comprises a support frame body, the support frame body comprises two frame bodies (11), the two frame bodies are connected into a whole through a hoisting beam, mounting seats are respectively arranged at the upper ends of the two frame bodies, height adjusting screws (15) are arranged outside the mounting seats, the ends of the height adjusting screws (15) are connected with rotating hoisting rings (14), and a front hoisting belt (12) and a rear hoisting belt (13) of a cylinder barrel of an oil cylinder (8) to be mounted in a limited space are connected with the rotating hoisting rings (14); The bridge type support (2) comprises a bridge type support frame body, a positioning seat (3) for positioning a hinge shaft is arranged at one end part of a support arm, and a jack (4) for pressing a bearing sleeve assembly (6) is arranged at the other end part of the support arm.
  6. 6. The installation device for the large hydraulic cylinder at the limited space is characterized in that two vertical plates are welded at one side supporting leg ends of two frame bodies of the adjustable support frame (1), locking screws (16) are arranged on the vertical plates located on the outer sides, the cylinder (8) is in an inclined state when being lifted by a front hanging belt (12) and a rear hanging belt (13), and the front hanging belt (12) and the rear hanging belt (13) are connected with a rotary hanging ring (14) by hooks.
  7. 7. The installation device for the large hydraulic cylinder at the limited space according to claim 5, wherein a bayonet is arranged on the inner side of the installation seat, lifting beams clamped at the two bayonets are welded with the two frame bodies into a whole, the end part of the height adjusting screw (15) is connected with a hanging strip through a rotary hanging ring (14), and the hanging strip is hung on the rotary hanging ring (14) through a hook.
  8. 8. The device for installing the large hydraulic cylinder at the limited space according to claim 5, wherein the positioning seat (3) comprises a cylinder part positioned at the outer end and a semicircular sleeve part (62) connected with the inner end of the cylinder part, a positioning cavity for positioning the hinge shaft is formed in the inner cavity of the semicircular sleeve part, a partition plate (67) is radially arranged between the cylinder part and the semicircular sleeve part, and a small screw rod (66) for disassembling the positioning seat is arranged on the partition plate.
  9. 9. The large hydraulic cylinder mounting device at the limited space according to claim 5, wherein the end part of the support arm is provided with a positioning step, and the cylindrical part of the positioning seat is clamped at the positioning step.
  10. 10. The large hydraulic cylinder mounting device at the limited space according to claim 5, wherein the bearing sleeve assembly (6) comprises a bearing sleeve (65) and a bearing (61) with an inner cavity centered by the bearing positioning sleeve (63), the bearing (61) is mounted on an inner port of the bearing sleeve (65) through a retainer ring, a pressing plate (64) is clamped on an outer port of the bearing sleeve (65), the pressing plate (64) is matched with the jack (4), the bearing positioning sleeve (63) is detachably mounted in the bearing sleeve (65), a radial partition plate is arranged in the middle of the bearing positioning sleeve (63), and a small screw (66) for detaching the bearing positioning sleeve is mounted on the radial partition plate.

Description

Large-scale hydraulic cylinder installation device and installation method at limited space Technical Field The invention relates to a hydraulic cylinder, in particular to a device and a method for installing a large-sized hydraulic cylinder. Background The hydraulic cylinder is used as an executive component of a hydraulic system, and the purpose of reciprocating motion is realized through the extension and contraction of a piston rod. The hydraulic cylinder can also design different hydraulic cylinder structures according to the use and installation environments according to the movement mode, the stress effect, the structural form and the like. However, in the actual use process, the installation mode of the hydraulic cylinder mainly comprises a pull rod structure, an earring structure, a foot structure, a hinge shaft structure, a flange structure installation and the like. The hydraulic cylinders with different mounting structures have different mounting methods in the actual mounting environment. The size of the large landing platform is 3.2m x 2.4m, the load is 8-10 tons, and the rotating frame is used for realizing the rotation of the large landing platform in the directions required by different directions and is arranged on a frame body with the height of about 1.7 meters from the ground. Two large-scale hydraulic cylinders (the cylinder 8 for short) are arranged in the inner cavity of the rotating frame, the cylinder barrel is arranged on the rotating frame 7 through a hinge shaft, the piston rod earrings 81 are arranged on the large-scale landing platform 9, and the lifting function of the large-scale landing platform 9 is realized through the extension and retraction of the piston rod (as shown in figures 7-11). In order to reduce the occupied space of the rotating frame, the whole structure is compact, and the hydraulic cylinder is arranged in a limited space (namely an inner cavity) of about 1260mmX252mm between two tailor-welded beams in the rotating frame. The external dimension 1580mmX250mm of the large hydraulic cylinder weighs about 360kg, and the total length of the cylinder reaches 2600mm when the piston rod is fully extended. How to mount the hinge shaft and bearing sleeve assembly of a large hydraulic cylinder at the mounting hole on the rotating frame beam has been a difficult problem. The existing installation method is that the oil cylinder is lifted to the installation position by a crane, the crane is lifted, an operator performs centering of the hinge shaft 82 and the installation hole 71 by naked eyes, the crane is required to be lifted repeatedly to perform effective centering due to large error, and then the original hammering method is adopted for assembly. The method comprises the steps of firstly installing a bearing sleeve assembly on an outer side beam of a rotating frame, installing a bearing on the inner end of an inner cavity of the bearing sleeve 65 through a retainer ring, enabling the outer circle of the bearing sleeve 65 to be in interference fit with an installation hole on the rotating frame beam, after the outer end of the inner cavity of the bearing sleeve 65 is clamped by a tooling plate, installing the bearing sleeve 65 into the installation hole by a large hammer, then hanging an oil cylinder to the middle installation position of two beams on the rotating frame by a crane, enabling the bearing sleeve assembly on the inner side beam of the rotating frame to gradually enter the installation hole of the beam by one person to strike the tooling plate, and when the inner bearing of the bearing sleeve assembly is in contact with the hinge shaft of the oil cylinder, one person is responsible for observing the centering and commanding the lifting of the bearing holes in the hinge shafts at two ends of the oil cylinder and the bearing sleeve assembly on the inner side beam and the outer side beam of the rotating frame, ensuring that the hinge shafts at two ends of the oil cylinder can be installed into the bearing holes in the bearing sleeve, then enabling the bearing sleeve assembly to be completely installed into the installation hole by the tooling plate, and pushing the hinge shafts at two ends of the oil cylinder into the bearing holes. The method has the following problems that 1, the method has higher requirements on operator literacy and responsibility in the assembly process, is greatly influenced by personal subjective factors of operators, and has uncontrolled installation quality. 2. The oil cylinder can have the phenomena of seepage, oil leakage and the like in the use process, and needs maintenance or replacement. 3. Because the rotating frame has compact structure, the outer side beams of the rotating frame are suspended in the air and have no standing position for operators, the operators need to install by means of the ascending ladder, potential safety hazards exist in the operation process, and space for specially placing the ascending ladder is