An engine elastic support device and its installation method

Abstract

The present invention discloses an engine elastic support device and an installation method thereof, relating to the field of engines, including a body support installed on the outer wall of the engine. A plurality of vibration isolators are connected to the body support through fixing members. Fixing blocks corresponding to the vibration isolators one by one are provided on the installation base surface. An adjustment cushion block is arranged between the fixing block and the vibration isolator. A jacking mechanism capable of jacking up the engine is further installed on the body support. The engine elastic support device and the installation method thereof provided by the present invention not only reduce the vibration and noise of the engine, and the vibration isolation efficiency reaches 95%, but also solve the problems of poor flame retardancy of resin and poor maintenance of the vibration isolator, etc.

Description

Technical Field

[0001] The present invention relates to the field of engines, and particularly to an engine elastic support device and an installation method thereof. Background Art

[0002] At present, most of the domestically promoted marine diesel engines adopt a rigid installation method, and the marine diesel engines with a rigid installation method have large vibration and noise. A small number of the promoted diesel engines with an elastic installation method generally directly pour the elastic isolator and the hull together with resin during installation. Although this structure reduces the vibration and noise of the diesel engine, the resin has poor flame retardancy and is prone to catching fire, and the maintainability of the isolator is also very poor. Summary of the Invention

[0003] The purpose of the present invention is to provide an engine elastic support device and an installation method thereof for the above problems, which not only reduce the vibration and noise of the engine, and the vibration isolation efficiency reaches 95%, but also solve the problems such as poor flame retardancy of resin and poor maintainability of the isolator.

[0004] The technical solution adopted by the present invention is as follows:

[0005] An engine elastic support device includes a body support installed on the outer wall of the engine. A plurality of isolators are connected to the body support through fixing members. Fixing blocks corresponding to the isolators one by one are provided on the installation base surface. An adjusting cushion block is arranged between the fixing block and the isolator. A jacking mechanism for jacking up the engine is also installed on the body support.

[0006] Further, a plurality of the isolators are evenly distributed on the body support along the direction of the length of the body support, and a jacking mechanism is provided between two adjacent isolators.

[0007] Further, the jacking mechanism includes a jacking bolt and a support block. The jacking bolt is installed on the body support, the axis of the jacking bolt is parallel to the axis of the isolator, the support block is arranged on the installation base surface, and the jacking bolt and the support block are in one-to-one correspondence.

[0008] Further, the isolator includes an elastic body and a locking mechanism, and the locking mechanism can act on the elastic body and limit the elastic body in a rigid state.

[0009] Further, an adjusting member is provided on the lower seat of the isolator, and the adjusting member can adjust the height of the lower seat plane P of the isolator.

[0010] Correspondingly, the present invention also discloses an installation method of an engine elastic support device, including the following steps:

[0011] Fixed block installation steps: Align the engine, determine the initial thickness of the fixed block according to the installation height of the engine, position the fixed block, and install the fixed block on the installation base surface;

[0012] Vibration isolator installation steps: Install the vibration isolator on the body support through the fixing parts, and hoist the engine so that the lower seat plane P of the vibration isolator falls on the upper plane Q of the fixed block;

[0013] Engine alignment steps: Make the locking mechanism of the vibration isolator act on the elastomer of the vibration isolator to restrict the elastomer to be in a rigid state, jack up the engine with the jacking mechanism, adjust the longitudinal and transverse positions of the engine, and limit it after meeting the alignment requirements;

[0014] Static pressure step: Release the jacking mechanism, the lower seat plane P of the vibration isolator falls back on the upper plane Q of the fixed block again, release the locking mechanism, make the elastomer of the vibration isolator return to the flexible state, apply static pressure for at least 48 hours, and record the height H' after the vibration isolator is compressed;

[0015] Vibration isolator adjustment steps: Jack up the engine with the jacking mechanism, adjust the vibration isolator through the adjusting parts to make the height H' of each vibration isolator consistent;

[0016] Adjusting pad installation steps: Record the distance value L between the lower seat plane P of the vibration isolator and the upper plane Q of the fixed block, machine the adjusting pad according to the distance value L, place the adjusting pad between the P surface and the Q surface, release the jacking mechanism to make the lower seat plane P of the vibration isolator fall on the adjusting pad, connect the lower seat of the vibration isolator, the adjusting pad and the fixed block through the fasteners, and adjust the vibration isolator to ensure it is in a flexible state.

[0017] Furthermore, it also includes a fine-tuning step: After the adjusting pad is installed, align the generator; if the alignment data meets the set value, the engine installation is completed; if the alignment data does not meet the set value, rotate the adjusting nut on the vibration isolator to fine-tune it to meet the requirements of the set value.

[0018] Furthermore, it also includes a review step: After the engine runs for the first 24 hours or after the test, review the alignment data of the engine; if the alignment data meets the set value, the review is completed; if the alignment data does not meet the set value, rotate the adjusting nut on the vibration isolator to fine-tune it to meet the requirements of the set value.

[0019] Furthermore, in the fixed block installation steps, after the fixed block is installed, the surface of the fixed block needs to be polished to make the upper plane Q of the fixed block flat, and the inclination per meter with the installation base surface does not exceed 3 millimeters.

[0020] Furthermore, the engine is a diesel engine, and after the engine alignment steps are completed, add oil and water to the diesel engine.

[0021] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0022] 1. The adjustment cushion block of the present invention can be made of steel material, replacing the traditional resin casting method, and solving problems such as poor flame retardancy of resin and poor maintenance of vibration isolators.

[0023] 2. The present invention solves the impact on the diesel engine under the sea conditions of ±45° roll and ±10° pitch of the marine engine.

[0024] 3. The vibration isolation efficiency of the elastic installation of the present invention can reach 95%. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the engine elastic support device of the present invention;

[0026] Figure 2 is a schematic structural diagram of the locking mechanism of the present invention;

[0027] Figure 3 is a schematic structural diagram of the static pressure step of the present invention;

[0028] Figure 4 is a schematic structural diagram of the jacking mechanism jacking up the engine of the present invention;

[0029] Figure 5 is a front view of the engine elastic support device of the present invention installed on the engine;

[0030] Figure 6 is a side view of the engine elastic support device of the present invention installed on the engine.

[0031] Markings in the figure: 1 - body support, 2 - vibration isolator, 3 - setscrew bolt, 4 - support block, 5 - installation base surface, 6 - fixing block, 7 - adjustment cushion block, 8 - fastener, 9 - adjustment part, 10 - fixing part, 11 - adjustment nut, 12 - engine. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present invention will be described in detail below with reference to the drawings.

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Embodiment 1

[0035] An engine elastic support device, such as Figures 1-4As shown in the figure, it includes a body support 1 installed on the outer wall of the engine 12. A number of vibration isolators 2 are connected to the body support 1 through fixing parts 10. Fixing blocks 6 corresponding to the vibration isolators 2 one by one are provided on the installation base surface 5. An adjusting cushion block 7 is arranged between the fixing block 6 and the vibration isolator 2. A jacking mechanism capable of jacking up the engine 12 is also installed on the body support 1. Preferably, the fixing block 6 is welded to the installation base surface 5, and the lower seat of the vibration isolator, the adjusting cushion block 7 and the fixing block 6 are connected into a whole through fasteners 8. The adjusting cushion block 7 is made of, but not limited to, steel material. The adjusting cushion block 7 made of steel material replaces the traditional resin casting method, solving problems such as poor flame retardancy of resin and poor maintenance of the vibration isolator 2.

[0036] A plurality of the vibration isolators 2 are evenly distributed on the body support 1 along the length direction of the body support 1, and a jacking mechanism is arranged between two adjacent vibration isolators 2.

[0037] The jacking mechanism includes a jacking bolt 3 and a support block 4. The jacking bolt 3 is installed on the body support 1, the axis of the jacking bolt 3 is parallel to the axis of the vibration isolator 2, the support block 4 is arranged on the installation base surface 5, and the jacking bolt 3 and the support block 4 are in one-to-one correspondence.

[0038] The vibration isolator 2 includes an elastomer and a locking mechanism. The locking mechanism can act on the elastomer and limit the elastomer to be in a rigid state. Preferably, the elastomer is rubber.

[0039] An adjusting part 9 is provided on the lower seat of the vibration isolator. The adjusting part 9 can adjust the height of the plane P of the lower seat of the vibration isolator.

[0040] Embodiment 2

[0041] An installation method of an elastic support device for an engine. In this embodiment, the engine 12 is a marine diesel engine, and the installation scenario of the elastic support device is the hull of a ship, as Figures 1-6 shown, including the following steps:

[0042] Installation step of the fixing block 6: First, align the gearbox of the ship with the hull shafting. According to the installation height of the gearbox and the diesel engine, determine the initial thickness of the fixing block 6, position the fixing block 6, and install the fixing block 6 on the installation base surface 5 (that is, weld the fixing block 6 to the hull), and pre-drill the relevant screw holes on the fixing block 6. Grind the surface of the fixing block 6 to make the upper plane Q of the fixing block 6 flat, with the flatness deviation not greater than 0.1 mm, the surface roughness being Ra3.2, no protrusions are allowed on the surface, a concavity less than 0.1 mm is allowed, and the inclination with the installation base surface 5 does not exceed 3 mm per meter;

[0043] Installation steps of the vibration isolator 2: Install the vibration isolator 2 on the body support 1 through the fixing member 10. Lift the diesel engine by hoisting so that the lower seat plane P of the vibration isolator falls on the upper plane Q of the fixing block 6;

[0044] Alignment steps of the diesel engine: Make the locking mechanism of the vibration isolator 2 act on the elastic body of the vibration isolator 2 to restrict the elastic body to be in a rigid state (i.e., the M surface is in contact with the N surface. The relevant structure of the vibration isolator 2 is the prior art, and the specific details will not be elaborated here). Use the jacking mechanism to lift the diesel engine, adjust the longitudinal and transverse positions of the diesel engine. After meeting the alignment requirements, limit the position and fill the diesel engine with oil and water;

[0045] Hydrostatic pressure step: Loosen the jacking mechanism, and the lower seat plane P of the vibration isolator 2 falls back on the upper plane Q of the fixing block 6 again. Release the locking mechanism, adjust the limit value h of the vibration isolator 2 to 4 mm, make the elastic body of the vibration isolator 2 return to the flexible state, apply hydrostatic pressure for at least 48 hours, and record the compressed height H' of the vibration isolator 2; Adjustment steps of the vibration isolator 2: Use the jacking mechanism to lift the diesel engine so that the diesel engine meets the alignment requirements, that is, the axis of the diesel engine is 1 ± 1 mm higher than the axis of the gearbox. Adjust the vibration isolator 2 through the adjusting member 9 so that the height H' of each vibration isolator 2 is consistent, the deviation between different vibration isolators 2 does not exceed 2 mm, and the deviation of each side of the same vibration isolator 2 does not exceed 0.5 mm;

[0046] Installation steps of the adjusting pad 7: Record the distance value L between the lower seat plane P of the vibration isolator 2 and the upper plane Q of the fixing block 6. Machine the adjusting pad 7 according to the distance value L, and place the adjusting pad 7 between the P surface and the Q surface. Loosen the jacking mechanism so that the lower seat plane P of the vibration isolator 2 falls on the adjusting pad 7. Connect the lower seat of the vibration isolator, the adjusting pad 7 and the fixing block 6 through the fastener 8, and adjust the vibration isolator 2 so that the adjustment limit value h of the vibration isolator 2 is 4 mm to ensure that it is in a flexible state.

[0047] Fine-tuning step: After the installation of the adjusting pad 7 is completed, align the generator; if the alignment data meets the set value, the installation of the diesel engine is completed; if the alignment data does not meet the set value, rotate the adjusting nut on the vibration isolator 2 to fine-tune it to meet the requirements of the set value.

[0048] Recheck step: After the diesel engine runs for the first 24 hours or after the test, recheck the alignment data of the diesel engine; if the alignment data meets the set value, the recheck is completed; if the alignment data does not meet the set value, rotate the adjusting nut on the vibration isolator 2 to fine-tune it to meet the requirements of the set value.

[0049] In this text, specific embodiments are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principles of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0051] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. An installation method of an engine elastic support device, which is applied to an engine elastic support device. The engine elastic support device includes a body support installed on the outer wall of the engine. A plurality of vibration isolators are connected to the body support through fixing members. Fixing blocks corresponding to the vibration isolators one by one are provided on the installation base surface. An adjusting cushion block is arranged between the fixing block and the vibration isolator. A jacking mechanism capable of jacking up the engine is also installed on the body support. The plurality of vibration isolators are evenly distributed on the body support along the direction of the length of the body support. A jacking mechanism is arranged between two adjacent vibration isolators. The characteristics are as follows, It includes the following steps: Fixing block installation step: Align the engine, determine the initial thickness of the fixing block according to the installation height of the engine, position the fixing block, and install the fixing block on the installation base surface; Vibration isolator installation step: Install the vibration isolator on the engine support through fasteners, and hoist the engine so that the lower seat plane P of the vibration isolator falls on the upper plane Q of the fixing block; Engine alignment step: Make the locking mechanism of the vibration isolator act on the elastomer of the vibration isolator to restrict the elastomer to be in a rigid state, jack up the engine with the jacking mechanism, adjust the longitudinal and lateral positions of the engine, and limit it after meeting the alignment requirements; Static pressure step: Loosen the jacking mechanism, the lower seat plane P of the vibration isolator falls back on the upper plane Q of the fixing block again, release the locking mechanism, make the elastomer of the vibration isolator return to the flexible state, apply static pressure for at least 48 hours, and record the height H' after the vibration isolator is compressed; Vibration isolator adjustment step: Jack up the engine with the jacking mechanism, adjust the vibration isolator through the adjustment parts to make the height H' of each vibration isolator consistent; Adjusting pad installation step: Record the distance value L between the lower seat plane P of the vibration isolator and the upper plane Q of the fixing block, machine the adjusting pad according to the distance value L, place the adjusting pad between the P surface and the Q surface, loosen the jacking mechanism to make the lower seat plane P of the vibration isolator fall on the adjusting pad, connect the lower seat of the vibration isolator, the adjusting pad and the fixing block through fasteners, and adjust the vibration isolator to ensure it is in a flexible state.

2. The installation method of the engine elastic support device according to claim 1, characterized in that, It also includes Fine-tuning step: After the adjusting pad is installed, align the generator; if the alignment data meets the set value, the engine installation is completed; if the alignment data does not meet the set value, rotate the adjusting nut on the vibration isolator to fine-tune it to meet the requirements of the set value.

3. The installation method of the engine elastic support device according to claim 1, characterized in that It also includes Recheck step: After the engine runs for the first 24 hours or after the test, recheck the alignment data of the engine; if the alignment data meets the set value, the recheck is completed; if the alignment data does not meet the set value, rotate the adjusting nut on the vibration isolator to fine-tune it to meet the requirements of the set value.

4. The installation method of the engine elastic support device according to claim 1, characterized in that, In the fixing block installation step, after the fixing block is installed, the surface of the fixing block needs to be polished to make the upper plane Q of the fixing block flat and the inclination per meter with the installation base surface not exceeding 3 millimeters.

5. The installation method of the engine elastic support device according to claim 1, characterized in that, The engine is a diesel engine. After the engine alignment step is completed, add oil and water to the diesel engine.

6. The installation method of the engine elastic support device according to claim 1, characterized in that, The jacking mechanism includes a jacking bolt and a support block. The jacking bolt is installed on the engine support, the axis of the jacking bolt is parallel to the axis of the vibration isolator, the support block is arranged on the installation base surface, and the jacking bolts and the support blocks are in one-to-one correspondence.

7. The installation method of the engine elastic support device according to claim 6, characterized in that, The vibration isolator includes an elastomer and a locking mechanism. The locking mechanism can act on the elastomer and restrict the elastomer to be in a rigid state.

8. The installation method of the engine elastic support device according to claim 6, characterized in that, The lower seat of the vibration isolator is provided with an adjusting part, and the adjusting part can adjust the height of the lower seat plane P of the vibration isolator.

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