A three-way limited steel spring vibration isolator

Abstract

The present invention relates to a three-way limited steel spring vibration isolator, comprising an upper shell (1), a steel spring group (2), a lower shell (3), an external limit device and an internal limit device, wherein the external limit device comprises an external limit rod (9) and a sliding wedge block (8), wherein the bottom of the external limit rod (9) is fixed on the lower shell (3), and the top cooperates with the sliding wedge block (8) to move up and down; the internal limit device is installed inside the lower shell (3) and comprises a limit cylinder (4), a sliding wedge block (5) and a threaded rod (6), wherein the limit cylinder (4) cooperates with the sliding wedge block (5) to move up and down. Compared with the prior art, the present invention can realize the function of adjustable axial limit height of the vibration isolator, and can ensure the same upper and lower limit clearances for different load conditions, and provide radial stiffness through the circumferential cooperation of the upper shell and the lower shell, so that the vibration isolator has a three-way limit function.

Description

Technical Field

[0001] The invention relates to a vibration isolation device, in particular to a steel spring vibration isolation device with a three-way limiting function, which is installed at the connection between a generator set and a foundation for reducing vibration and noise. Background Art

[0002] As a widely used vibration isolator, steel spring isolator is usually installed between the generator set and the installation foundation to reduce the transmission of vibration energy and noise between the generator set and the installation foundation. In addition, in the event of a sudden earthquake or when the vibration isolator is used on a ship, the vibration isolator with a limit function can effectively prevent the vibration isolator from being damaged in extreme situations such as external impact.

[0003] At present, the existing steel spring isolators in the industry rarely have a limiting function. When the steel spring isolator is damaged due to extreme deformation, it will seriously affect the normal operation of the generator set and cause huge economic losses. Chinese patent CN201920739220.4 discloses a steel spring isolator with an axial limiting function, including: an upper mounting plate and a bottom shell, the upper mounting plate and the bottom shell are connected by a limiting member, and a plurality of steel springs are arranged between the upper mounting plate and the bottom shell, and the plurality of steel springs are evenly distributed around the limiting member; the limiting member includes: an upper limit hook and a lower limit hook connected to the upper limit hook, the upper limit hook is arranged on the upper mounting plate, and the lower limit hook is arranged on the bottom shell. Although the steel spring isolator disclosed in the patent technology has a limiting function, the limiting gap cannot be adjusted. When multiple steel spring isolators are applied to a generator set at the same time, due to the complexity of the generator set structure, it is difficult to ensure that all isolators have the same initial deformation, resulting in changes in the limiting gap of the isolator, affecting the limiting performance and service life of the isolator. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a three-way limiting steel spring vibration isolator with adjustable axial limiting height.

[0005] The objective of the present invention can be achieved through the following technical scheme: a three-way limiting steel spring isolator, comprising an upper shell, a steel spring group, and a lower shell, wherein the steel spring group is placed in a shell composed of the upper shell and the lower shell, and is characterized in that it also includes an external limiting device and an internal limiting device, wherein the external limiting device includes an external limiting rod and a sliding wedge block 1, wherein the bottom of the external limiting rod is fixed to the lower shell, and the top cooperates with the sliding wedge block 1 to move up and down, and is fixed to the upper shell after adjusting the axial height; the internal limiting device is installed inside the lower shell and includes a limiting cylinder, a sliding wedge block 2 and a threaded rod, wherein the limiting cylinder cooperates with the sliding wedge block 2 to move up and down, and the threaded rod is threadedly connected to the sliding wedge block 2.

[0006] The external limit rod is in an inverted "L" shape as a whole, including a top cross bar and a side vertical bar. The bottom end surface of the side vertical bar is provided with multiple built-in threaded holes, the top end surface of the top cross bar is inclined, and is provided with an inverted "T"-shaped built-in groove. The sliding wedge block is on the cross bar of the external limit rod and slides along the cross bar to achieve axial height adjustment.

[0007] The upper end face of the sliding wedge block is inclined, the lower end face is horizontal, and a rectangular through hole is provided inside. The top cross bar of the external limit rod is inserted into the rectangular through hole. The upper end face of the sliding wedge block is provided with an internal threaded hole, and a fastening bolt is inserted through the internal threaded hole into the "T"-shaped groove on the cross bar of the external limit rod for positioning.

[0008] There are at least two external limit rods, which are symmetrically arranged on both sides of the shell formed by the upper shell and the lower shell, and a plurality of internal threaded holes are arranged on the bottom end surface of the external limit rod. The bottom of the external limit rod is fixed to both sides of the lower shell by fastening bolts 2.

[0009] The upper end surface of the limiting cylinder is horizontal, and the lower end surface is inclined.

[0010] The sliding wedge block 2 is rectangular in shape as a whole, with an upper end surface provided with an inclined surface that cooperates with the limiting cylinder, and two opposite sides of the top provided with rectangular bosses that block the movement of the limiting cylinder; the sliding wedge block 2 is provided with a built-in threaded hole inside, which is threadedly connected to the threaded rod.

[0011] Two rectangular grooves are provided on opposite sides of the upper surface of the upper shell, the top of the external limit rod is inserted into the rectangular groove, and the shells of different heights can be used by adjusting the position of the sliding wedge block 1 on the external limit rod;

[0012] A convex cylinder is provided at the geometric center of the lower end surface of the upper shell, and a plurality of upper spring installation grooves are provided around the convex cylinder. Each upper spring installation groove is provided with upper reinforcing ribs distributed in a hexagonal shape and an upper embedded ring in contact with the steel spring;

[0013] A rectangular through hole matching the limiting cylinder is provided at the geometric center of the lower shell, and a plurality of lower spring mounting grooves are provided around the rectangular through hole, and each lower spring mounting groove is provided with lower reinforcing ribs distributed in a hexagonal shape and a lower embedded ring in contact with the steel spring;

[0014] The steel spring assembly is installed in each spring installation groove and fixed by an upper embedded fixing ring and a lower embedded fixing ring.

[0015] The convex cylinder of the upper shell provides an axial lower limit for the vibration isolator by contacting with the top of the limit cylinder. The sliding wedge block 2 is moved by screwing the threaded rod to adjust the height of the limit cylinder, thereby realizing the function of adjustable axial lower limit height of the vibration isolator.

[0016] The bottom end of the upper shell is provided with a circumferential protrusion, and the top end of the lower shell is circumferentially provided with a circumferential groove that matches the circumferential protrusion of the upper shell to limit the radial position of the vibration isolator.

[0017] Eight internal threaded holes are machined on one opposite side of the lower shell.

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

[0019] (1) The vibration isolator of the present invention is provided with an external limit device, which includes an L-shaped external limit rod symmetrically arranged on both sides of the shell, the bottom of the external limit rod is fixed to the lower shell, the top is inserted into the groove of the upper shell, and the top is inclined, and a wedge block is provided in conjunction with it. The distance between the inclined cross bar at the top of the external limit rod and the top of the upper shell is adjusted by moving the wedge block forward and backward. When the height of the shell changes, although the height of the vertical rod of the L-shaped external limit rod is fixed, since the top cross bar is inclined, the upper shells of different heights can be firmly fixed to the lower shell by adjusting the sliding wedge block on the cross bar.

[0020] (2) The vibration isolator of the present invention is provided with a built-in limit device, which includes a limit cylinder, a sliding wedge block 2 and a threaded rod, wherein the top of the sliding wedge block 2 is provided with an inclined surface, and the bottom of the limit cylinder is an inclined surface. The interactive inclined block 2 can be driven to move forward and backward by rotating the threaded rod, and the top of the limit cylinder is inserted into the rectangular through hole at the geometric center of the lower shell, so it will not move forward and backward with it, but because the bottom will slide on the inclined surface of the sliding wedge block 2,

[0021] Thereby, the limiting cylindrical shaft can move up and down, thus being able to adapt to lower shells of different heights.

[0022] (3) The present invention can realize the function of adjustable axial limit height of the vibration isolator by moving sliding wedge block 1 and sliding wedge block 2, and can ensure the same upper and lower limit clearance for different load conditions, and through the circumferential cooperation of the upper shell and the lower shell, the vibration isolator has a three-way limit function. The limit effect can effectively prevent the vibration isolation heavy object from producing a large displacement, and at the same time can also play a role in protecting the steel spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of a vibration isolator according to an embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of an external limit device according to an embodiment of the present invention;

[0025] Figure 3 It is a partial enlarged schematic diagram of the external limit device of an embodiment of the present invention;

[0026] Figure 4is a cross-sectional view of the overall structure of the vibration isolator according to an embodiment of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the inner limit device of an embodiment of the present invention;

[0028] Figure 6 It is a schematic structural diagram of an upper shell of a vibration isolator according to an embodiment of the present invention;

[0029] Figure 7 It is a schematic structural diagram of the lower shell of the vibration isolator according to an embodiment of the present invention.

[0030] In the figure: 1—upper shell, 2—steel spring group, 3—lower shell, 4—limiting cylinder, 5—two sliding wedges, 6—threaded rod, 7—one fastening bolt, 8—one sliding wedge, 9—external limiting rod, 10—two fastening bolts, 1-1—upper embedded ring, 1-2—upper reinforcing rib, 1-3—convex cylinder, 3-1—lower embedded ring, 3-2—lower reinforcing rib, 3-3—rectangular through hole, 3-4—internal threaded hole. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figures 1 to 3As shown, a three-way limited steel spring isolator includes an upper shell 1, a steel spring group 2, and a lower shell 3. The steel spring group 2 is placed in a shell composed of the upper shell 1 and the lower shell 3, and also includes an external limit device and an internal limit device. The external limit device includes an external limit rod 9, a sliding wedge block 8, a fastening bolt 7 and a fastening bolt 10. The external limit rod 9 is an inverted "L" shape as a whole, including a top cross bar and a side vertical bar. The bottom end surface of the side vertical bar is provided with a plurality of internal threaded holes, the top end surface of the top cross bar is inclined, and is provided with an inverted "T"-shaped internal groove. The sliding wedge block 8 is on the cross bar of the external limit rod 9 and slides along the cross bar to achieve axial height adjustment. The upper end face of the sliding wedge block 8 is inclined, and the lower end face is horizontal, with a rectangular through hole inside, and the top cross bar of the external limit rod 9 is inserted into the rectangular through hole. The upper end face of the sliding wedge block 8 is provided with an internal threaded hole, and a fastening bolt 7 is passed through the internal threaded hole and inserted into the "T"-shaped groove on the cross bar of the external limit rod 9 for positioning.

[0036] There are two external limit rods 9, which are symmetrically arranged on both sides of the shell body composed of the upper shell body 1 and the lower shell body 3, and a plurality of internal threaded holes are arranged on the bottom end surface of the external limit rod 9, and the bottom of the external limit rod 9 is fixed to both sides of the lower shell body 3 by fastening bolts 10. The vibration isolator of this embodiment provides an axial upper limit through the external limit rod 9, which can effectively prevent the vibration isolation weight from causing a large displacement, and can also play a role in protecting the steel spring group 2. By adjusting the height of the sliding wedge block 8 on the external limit rod 9, the function of adjustable axial upper limit height of the vibration isolator can be realized, and the same axial upper limit clearance can be guaranteed for different load conditions.

[0037] like Figures 4-5 As shown, the built-in limiting device is installed inside the lower shell 3, including a limiting cylinder 4, a sliding wedge block 2 5 and a threaded rod 6. The limiting cylinder 4 cooperates with the sliding wedge block 2 5 to move up and down, and the threaded rod 6 is threadedly connected to the sliding wedge block 2 5. The upper end surface of the limiting cylinder 4 is horizontal, and the lower end surface is inclined. The sliding wedge block 2 5 is rectangular as a whole, and the upper end surface is provided with an inclined surface that cooperates with the limiting cylinder 4, and the two opposite sides of the top are provided with rectangular bosses that block the movement of the limiting cylinder 4; the sliding wedge block 2 5 is provided with a built-in threaded hole inside, which is threadedly connected to the threaded rod 6. The limiting cylinder 4 is connected with the sliding wedge block 2 5, and moves up and down along the sliding wedge block 2 5, and the threaded rod 6 is threadedly connected to the sliding wedge block 2 5. The convex cylinder 1-3 of the upper shell provides an axial lower limit for the vibration isolator by contacting with the top of the limit cylinder 4. The sliding wedge block 2 5 is moved by screwing the threaded rod 6 to adjust the height of the limit cylinder 4, thereby realizing the function of adjustable axial lower limit height of the vibration isolator.

[0038] like Figures 6-7As shown, two rectangular grooves are provided on opposite sides of the upper surface of the upper shell 1, and the top of the external limit rod 9 is inserted into the rectangular groove, and by adjusting the position of the sliding wedge block 8 on the external limit rod 9, shells of different heights can be used;

[0039] A convex cylinder 1-3 is provided at the geometric center of the lower end surface of the upper shell 1, and a plurality of upper spring mounting grooves are provided around the convex cylinder 1-3. Each upper spring mounting groove is provided with upper reinforcing ribs 1-2 distributed in a hexagonal shape and an upper embedded ring 1-1 in contact with the steel spring;

[0040] A rectangular through hole 3-3 cooperating with the limiting cylinder 4 is provided at the geometric center of the lower shell 3, and a plurality of lower spring mounting grooves are provided around the rectangular through hole 3-3, and each lower spring mounting groove is provided with a hexagonally distributed lower reinforcing rib 3-2 and a lower embedded ring 3-1 in contact with the steel spring;

[0041] The steel spring group 2 includes 4 groups of steel springs, which are respectively installed in each spring installation groove and fixed by the upper fixing ring 1-1 and the lower fixing ring 3-1. The 4 steel springs are evenly distributed between the upper shell 1 and the lower shell 3 to provide axial stiffness for the vibration isolator.

[0042] The convex cylinder 1-3 of the upper shell 1 provides an axial lower limit for the vibration isolator by contacting with the top of the limit cylinder 4. The sliding wedge block 2 5 is moved by screwing the threaded rod 6 to adjust the height of the limit cylinder 4, thereby realizing the function of adjustable axial lower limit height of the vibration isolator.

[0043] The bottom end of the upper shell 1 is provided with a circumferential protrusion, and the top end of the lower shell 3 is circumferentially provided with a circumferential groove that cooperates with the circumferential protrusion of the upper shell 1, which is used to limit the radial position of the vibration isolator. Four internal threaded holes are evenly arranged around the upper shell 1 and the lower shell 3 for fixing the upper shell 1 and the lower shell 3. Four grooves arranged in a 2×2 arrangement are reserved for the contact part of the upper shell 1 and the lower shell 3 with the steel spring, and an upper embedded ring 1-1 and a lower embedded ring 3-1 for fixing the spring are designed to prevent the steel spring 2 from moving left and right. Rubber vibration damping pads are provided in the contact area between the steel spring and the upper shell 1 and the lower shell 2 to increase the damping of the vibration isolator. At the same time, upper reinforcing ribs 1-2 and lower reinforcing ribs 3-2 distributed in a hexagonal shape are provided in the groove to improve the strength of the upper shell 1 and the lower shell 3. A rectangular through hole 3-3 that cooperates with the limiting cylinder 4 is provided at the geometric center of the lower shell 3, and eight built-in threaded holes 3-4 are processed on one opposite side of the bottom end surface.

[0044] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A three-way limited steel spring vibration isolator, comprising an upper shell (1), a steel spring group (2), and a lower shell (3), wherein the steel spring group (2) is placed in a shell composed of the upper shell (1) and the lower shell (3), characterized in that: It also includes an external limiting device and an internal limiting device, wherein the external limiting device includes an external limiting rod (9) and a sliding wedge block (8), wherein the bottom of the external limiting rod (9) is fixed to the lower shell (3), and the top cooperates with the sliding wedge block (8) to move up and down, and is fixed to the upper shell (1) after adjusting the axial height; the internal limiting device is installed inside the lower shell (3) and includes a limiting cylinder (4), a sliding wedge block (5) and a threaded rod (6), wherein the limiting cylinder (4) cooperates with the sliding wedge block (5) to move up and down, and the threaded rod (6) is threadedly connected to the sliding wedge block (5); The external limit rod (9) is in an inverted "L" shape as a whole, including a top cross bar and a side vertical bar, the bottom end surface of the side vertical bar is provided with a plurality of internal threaded holes, the top end surface of the top cross bar is inclined, and is provided with an inverted "T" shaped internal groove, the sliding wedge block (8) is on the cross bar of the external limit rod (9) and slides along the cross bar to achieve axial height adjustment; The upper end surface of the sliding wedge block (8) is inclined, and the lower end surface is horizontal. A rectangular through hole is provided inside. The top cross bar of the external limit rod (9) is inserted into the rectangular through hole. The upper end surface of the sliding wedge block (8) is provided with an internal threaded hole. A fastening bolt (7) is inserted through the internal threaded hole into the "T"-shaped groove on the cross bar of the external limit rod (9) for positioning. The distance between the inclined cross bar at the top of the external limit rod and the top of the upper shell can be adjusted by moving the sliding wedge block (8) forward and backward, so that the upper shells of different heights can be firmly fixed on the lower shell; The sliding wedge block 2 (5) is rectangular in shape as a whole, and an upper end surface is provided with an inclined surface that matches the limiting cylinder (4), and two opposite sides of the top are provided with rectangular bosses that block the movement of the limiting cylinder (4); the sliding wedge block 2 (5) is provided with a built-in threaded hole inside, which is threadedly connected to the threaded rod (6); by rotating the threaded rod (6), the sliding wedge block 2 (5) is driven to move forward and backward, so that the limiting cylinder (4) moves axially up and down to adapt to lower shells of different heights; By moving the sliding wedge block 1 (8) and the sliding wedge block 2 (5), the function of adjusting the axial limit height of the vibration isolator is realized, and the same upper and lower limit clearances can be ensured for different load conditions. In addition, through the circumferential cooperation of the upper shell body (1) and the lower shell body (3), the vibration isolator has a three-way limit function.

2. A three-way limited steel spring vibration isolator according to claim 1, characterized in that: At least two of the external limit rods (9) are symmetrically arranged on both sides of the shell body formed by the upper shell body (1) and the lower shell body (3), and a plurality of internal threaded holes are arranged on the bottom end surface of the external limit rods (9). The bottom of the external limit rods (9) is fixed to both sides of the lower shell body (3) by fastening bolts (10).

3. The three-way limited steel spring vibration isolator according to claim 1, characterized in that: The upper end surface of the limiting cylinder (4) is horizontal, and the lower end surface is inclined.

4. The three-way limited steel spring vibration isolator according to claim 1, characterized in that: Two rectangular grooves are provided on opposite sides of the upper surface of the upper shell (1), and the top of the external limit rod (9) is inserted into the rectangular groove. By adjusting the position of the sliding wedge block (8) on the external limit rod (9), shells of different heights can be used.

5. The three-way limited steel spring vibration isolator according to claim 1, characterized in that: A convex cylinder (1-3) is provided at the geometric center of the lower end surface of the upper shell (1), and a plurality of upper spring installation grooves are provided around the convex cylinder (1-3), and each upper spring installation groove is provided with upper reinforcing ribs (1-2) distributed in a hexagonal shape and an upper embedded ring (1-1) in contact with the steel spring; A rectangular through hole (3-3) cooperating with the limiting cylinder (4) is provided at the geometric center of the lower shell (3), a plurality of lower spring installation grooves are provided around the rectangular through hole (3-3), and each lower spring installation groove is provided with lower reinforcing ribs (3-2) distributed in a hexagonal shape and a lower embedded ring (3-1) in contact with the steel spring; The steel spring group (2) is installed in each spring installation groove and fixed by an upper embedded fixing ring (1-1) and a lower embedded fixing ring (3-1).

6. A three-way limited steel spring vibration isolator according to claim 5, characterized in that: The convex cylinder (1-3) of the upper shell (1) provides an axial lower limit for the vibration isolator by contacting the top end of the limit cylinder (4). The second sliding wedge (5) is moved by screwing the threaded rod (6) to adjust the height of the limit cylinder (4), thereby realizing the function of adjustable height of the axial lower limit of the vibration isolator.

7. The three-way limited steel spring vibration isolator according to claim 1, characterized in that: The bottom end of the upper shell (1) is provided with a circumferential protrusion, and the top end of the lower shell (3) is circumferentially provided with a circumferential groove that cooperates with the circumferential protrusion of the upper shell (1) and is used for radial limiting of the vibration isolator.

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