CN113145434A

CN113145434A - Two-stage type moment-adjusting vibration exciter

Info

Publication number: CN113145434A
Application number: CN202110505776.9A
Authority: CN
Inventors: 王秀忠; 俞振燊
Original assignee: Wuxi Kunlong Construction Machinery Co ltd
Current assignee: Wuxi Kunlong Construction Machinery Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-07-23

Abstract

The invention relates to a two-stage type moment-adjusting vibration exciter which structurally comprises a vibration exciter box body and an internal bilateral symmetry moment-adjusting mechanism, wherein the moment-adjusting mechanism comprises a central shaft, static blocks, a movable block, a synchronous gear and a limit pin shaft, two ends of the central shaft are respectively connected with two side surfaces of the vibration exciter box body through axial self-aligning bearing supports, the two static blocks are installed on the central shaft, the movable block is installed between the two static blocks, the synchronous gear is further installed on the central shaft outside one static block, the two static blocks are fixedly connected with the synchronous gear through static block synchronous installation bolts, the two static blocks are connected through the limit pin shaft, and the movable block is provided with a limit pin shaft collision groove. The invention has the advantages that: the central shaft is respectively in a high-low two-stage eccentric moment state when rotating clockwise and anticlockwise to finish the low-frequency piling of a large load in a soft soil layer and the high-frequency piling of a small load in a hard soil layer, the eccentric key of the static block is connected with the central shaft and arranged on two sides of the movable block, the structure is stable, and the limiting pin and the groove of the movable block are limited by the molded surface to fix a corner. Can be used for two or four eccentric gear occasions.

Description

Two-stage type moment-adjusting vibration exciter

Technical Field

The invention relates to a two-stage type moment-adjusting vibration exciter, in particular to a two-stage type moment-adjusting vibration exciter of a hydraulic vibration pile driving hammer with adjustable eccentric moment, and belongs to the technical field of piling machinery.

Background

The hydraulic vibration pile hammer is a pile sinking and pulling construction machine widely used in various foundation construction projects such as city construction, bridges, ports and the like. The pile frame is generally matched with a crane and a pile frame for use, is suitable for the sinking and pulling operation of various steel sheet piles and various steel pipe piles, and can also be used for various types of foundation operation such as concrete cast-in-place piles, lime piles, sand piles and the like. The working principle of the pile hammer is as follows: the pile hammer holds the pile body for forced vibration, and the high frequency vibration is transmitted to the soil layer in contact with the pile to cause the change of the physical properties of the soil, thereby reducing the friction force. And then controlling the periodically reciprocating exciting force to carry out pile sinking and pulling operation.

Along with the rapid development and continuous perfection of the hydraulic technology, the pile hammer driven by the hydraulic motor is produced, and compared with the motor, the hydraulic motor has better vibration resistance and shock load resistance, has smaller external dimension and lighter weight, and is beneficial to reducing the quality of a vibrating body, improving the amplitude and improving the pile sinking effect. The hydraulic vibration pile driving hammer also has strong operation capability, excellent controllability and safety of outdoor construction.

However, the working condition of the soil layer is uncertain, and the excitation load in the pile driver in the prior art is generally fixed. The soft soil layer needs to be piled with heavy load and low frequency, and the hard soil layer needs to be piled with light load and high frequency. Therefore, a vibration exciter for a pile driver, which can meet the requirement of efficient pile sinking and pulling operation in both soft soil layers and hard soil layers, is urgently needed.

Disclosure of Invention

The invention provides a two-stage type moment-adjusting vibration exciter, aiming at filling the blank in the prior art and realizing the purpose of adapting to variable eccentric moment vibration sinking-pulling piles under different soil layer working conditions.

The technical solution of the invention is as follows: two-stage type moment adjusting vibration exciter, its structure includes the vibration exciter box and installs the moment adjusting mechanism at the inside bilateral symmetry of vibration exciter box, moment adjusting mechanism includes the center pin, quiet piece, the movable block, synchronous gear and spacing round pin axle, the center pin is located the inside and both ends of vibration exciter box and supports through an axial aligning bearing respectively, vibration exciter box both sides face is connected respectively to both sides axial aligning bearing, two quiet pieces are installed on the center pin, the movable block is installed on the center pin between two quiet pieces, still be equipped with synchronous gear on the outside center pin axle of one side quiet piece, two quiet pieces consolidate with synchronous gear through quiet piece synchronous erection bolt mutually, connect through the spacing round pin axle between two quiet pieces, both ends are equipped with respectively on the movable block and collide the recess with spacing round pin axle shape complex spacing round pin axle, the synchronous gear intermeshing of adjacent moment adjusting mechanism.

Preferably, the static block is directly connected to the central shaft through a key, and the movable block is mounted on the central shaft 4 through a movable block rotary bearing.

Preferably, the moment adjusting mechanisms are 2 groups or 4 groups, 2 groups of moment adjusting mechanisms are arranged left and right, 4 groups of moment adjusting mechanisms are arranged left and right, 2 groups of upper and lower groups are arranged left and right, and synchronous gears of other moment adjusting mechanisms except the upper 2 groups are meshed with each other.

According to the working method of the two-stage moment-adjusting vibration exciter, when a central shaft of a left moment-adjusting mechanism rotates anticlockwise, a movable block and a fixed block are in a moment superposition state to generate large moment, so that a high-grade eccentric working condition is realized, and high-load low-frequency piling of a soft soil layer is performed; when the central shaft of the left side moment adjusting mechanism rotates clockwise, the movable block and the static block are in a moment subtraction state, so that the working condition of low-level eccentric moment is realized to generate small moment, and the piling of the hard soil layer under small load at high frequency is carried out.

The invention has the advantages that: structural design is reasonable, and appearance symmetrical design controls side spacer pin axle collision recess, can be in high low two-stage eccentric moment state respectively when the clockwise anticlockwise rotation of center pin, accomplishes soft soil layer heavy load low frequency pile, the pile of the little load high frequency of hard soil layer under big or small eccentric moment's the condition, and quiet piece eccentric key-type connects the center pin and arranges in the movable block both sides, stable in structure, the spacer pin is spacing with fixed corner through the profile with the movable block recess. The gear can be used for two-eccentric gear or four-eccentric gear occasions, and the application range is wide.

Drawings

Fig. 1 is an axial structural schematic diagram of the two-stage type moment-adjustable vibration exciter of the invention.

Fig. 2 is an eccentric arrangement schematic diagram of the two-stage type moment-adjusting vibration exciter of the invention under the working condition of high eccentric moment.

Fig. 3 is a schematic view of the two-stage type moment-adjusting vibration exciter of the invention used for four-eccentric superposition installation.

Fig. 4 is a schematic diagram of four-eccentric-center superposition installation of the two-stage type moment-adjusting vibration exciter under the working condition of low-level eccentric moment.

In the figure, 1 is a vibration exciter box body, 2 is an axial self-aligning bearing, 3 is a movable block rotary bearing, 4 is a central shaft, 5 is a static block (eccentric), 6 is a static block synchronous mounting bolt, 7 is a movable block (eccentric), 8 is a synchronous gear, and 9 is a limit pin shaft.

Detailed Description

The present invention will be described in further detail with reference to examples and specific embodiments.

As shown in fig. 1-4, a two-stage type moment adjusting vibration exciter structurally comprises a vibration exciter case 1 and a bilateral symmetry moment adjusting mechanism installed inside the vibration exciter case 1, wherein the moment adjusting mechanism comprises a central shaft 4, static blocks 5, a movable block 7, a synchronous gear 8 and a limit pin shaft 9, the central shaft 4 is located inside the vibration exciter case 1, two ends of the central shaft are respectively supported by an axial self-aligning bearing 2, the axial self-aligning bearings 2 on two sides are respectively connected with two side surfaces of the vibration exciter case 1, the two static blocks 5 are installed on the central shaft 4, the movable block 7 is installed on the central shaft 4 between the two static blocks 5, the central shaft 4 outside the static block 5 on one side is also provided with the synchronous gear 8, the two static blocks 5 are fixedly connected with the synchronous gear 8 through static block synchronous installation bolts 6, the two static blocks 5 are connected through the limit pin shaft 9, two ends of the movable block 7 are respectively provided with limit pin shaft collision grooves matched with the limit pin shaft 9 in shape (the rotation process of the movable block 7 is limited by the limit pin shaft 9, and finally, two-stage moment adjustment is realized), and the synchronous gears 8 of the adjacent moment adjustment mechanisms are meshed with each other.

The static block 5 is directly connected to the central shaft 4 through a key, and the movable block 7 is installed on the central shaft 4 through the movable block slewing bearing 3. The free rotation of the movable block 7 in the circumferential direction is realized.

The moment adjusting mechanisms are 2 groups or 4 groups in total, 2 groups of moment adjusting mechanisms are arranged left and right, 4 groups of moment adjusting mechanisms are arranged left and right, upper and lower 2 groups are respectively arranged left and right, and synchronous gears 8 of other moment adjusting mechanisms except the upper 2 groups are meshed with each other. The gear meshing mechanism can be used for occasions with two eccentric gears or four eccentric gears, when the gear meshing mechanism is used in occasions with four eccentric gears, the two gears at the lower end are meshed, the gears at the upper end are not meshed, and the gears at the upper end are respectively meshed with the gears at the lower part independently.

According to the structure, when the two-stage moment-adjusting vibration exciter works, the eccentric moment of the vibration exciter is changed through the phase difference generated by the rotation of the movable block eccentric and the static block eccentric around the central shaft 4, the left central shaft 4 rotates anticlockwise, the movable eccentric block and the static eccentric block are in a moment superposition state, and the high-grade eccentric working condition is realized; the left central shaft 4 rotates clockwise, and the dynamic and static eccentric blocks are in a moment subtraction state, so that the working condition of low-level eccentric moment is realized.

And then accomplish the relation between the eccentric moment superposes or disperses between movable block 7 and the quiet piece 4 through simple control vibration exciter positive and negative rotation, make anticlockwise rotation vibration exciter produce the big moment that movable block 7 and quiet piece 4 eccentric moment superpose the production, clockwise rotation produces movable block 7 and produces little moment with quiet piece 4 eccentric moment by subtraction. And the low-frequency piling of the soft soil layer with large load and the high-frequency piling of the hard soil layer with small load are completed under the condition of large and small eccentric moments.

All the above components are prior art, and those skilled in the art can use any model and existing design that can implement their corresponding functions.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The two-stage type moment-adjusting vibration exciter is characterized by comprising a vibration exciter box body (1) and a bilateral symmetry moment-adjusting mechanism arranged in the vibration exciter box body (1), wherein the moment-adjusting mechanism comprises a central shaft (4), static blocks (5), a movable block (7), synchronous gears (8) and a limit pin shaft (9), the central shaft (4) is positioned in the vibration exciter box body (1), two ends of the central shaft are respectively supported by an axial aligning bearing (2), the axial aligning bearings (2) at two sides are respectively connected with two side surfaces of the vibration exciter box body (1), the two static blocks (5) are arranged on the central shaft (4), the movable block (7) is arranged on the central shaft (4) between the two static blocks (5), the synchronous gear (8) is also arranged on the central shaft (4) at the outer side of one static block (5), and the two static blocks (5) are fixedly connected with the synchronous gears (8) through static block synchronous mounting bolts (6), two static blocks (5) are connected through a limit pin shaft (9), two ends of the movable block (7) are respectively provided with a limit pin shaft collision groove matched with the limit pin shaft (9) in shape, and synchronous gears (8) of adjacent moment adjusting mechanisms are meshed with each other.

2. The two-stage moment-adjustable vibration exciter as claimed in claim 1, characterized in that the stationary mass (5) is directly connected to the central shaft (4) by a key, and the movable mass (7) is mounted on the central shaft (4) by a movable mass slewing bearing (3).

3. The two-stage type moment-adjusting vibration exciter as claimed in claim 1, wherein the moment-adjusting mechanisms are arranged in 2 groups or 4 groups, 2 groups of moment-adjusting mechanisms are arranged in left and right, 4 groups of moment-adjusting mechanisms are arranged in 2 groups of left and right, and the synchronizing gears (8) of other moment-adjusting mechanisms except the upper 2 groups are meshed with each other.

4. The working method of the two-stage moment-adjusting vibration exciter according to any one of claims 1 to 3, characterized in that when the central shaft (4) of the left moment-adjusting mechanism rotates counterclockwise, the movable block (7) and the stationary block (5) are in a moment superposition state to generate a large moment, thereby realizing a high-grade eccentric working condition and performing low-frequency piling on a soft soil layer under a large load; when a central shaft (4) of the left side moment adjusting mechanism rotates clockwise, the movable block (7) and the static block (5) are in a moment subtraction state, so that the working condition of low-level eccentric moment is realized to generate small moment, and the high-frequency piling of the small load of the hard soil layer is carried out.