Head Expander

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Introduction

Square Head Expander
Round Head Expander
Installation Examples

1. The head expander supplied by our company has various types, and it can be specially customized to meet the requirements of customers for expanding the vibration shaker.

2. In actual vibration test, specimen or fixture is commonly larger than the electro-dynamic shaker armature table. As a result, the original table needs to be extended by installing an auxiliary table.

3. The extended table has stringent requirements for the working frequency, table weight, table acceleration, amplitude uniformity, and the lateral movement, etc.

4. The VT series product undergoes finite element modal analysis. Its quality is guaranteed with superior structure, materials, and workmanship.

Advantages
1. All shake system expanders supplied by DONGLING have passed the finite element analysis. Their structure has been optimized.
2. High-quality workmanship guarantees stable performance and reliable technical indicators.
3. The standard-series head expander is optional. Its shape can be round or square. Its raw material can be aluminum or magnesium.

Models

Technical Parameters

1. Square Type

Table Diameter Model	-150	-200	-230 -240	-320	-370	-445/480	-550	-590
VT0303	7 2000	8 2000	10 2000				Effective Mass (kg) Upper Limit Frequency (Hz)
VT0404	12 2000	13 2000	21 2000
VT0505	20 2000	23 2000	32 2000	32 2000	33 2000
VT0606	29 1200	37 1500	38 1500	40 2000	40 2000	53 2000
VT0707			43 1000	60 2000	80 2000	80 2000
VT0808			60 1000	70 1200	80 1300	85 1300	125 1800	135 1800
VT0909			80 7 00	95 1000	95 1000	100 1000	120 1000	120 1000
VT1010			73 400	100 600	110 800	185 1000	200 1000	210 12 00
VT1111						230 500	245 700	160 700
VT1212	Effective Mass (kg) Upper Limit Frequency (Hz)					250 400	265 500	280 500
VT1515						350 400	400 400	420 400
VT2020							900 300	1000 300

2. Round Type

Table Diameter Model	-150	-200	-230 -240	-320	-370	-445/480	-550	-590
VT300	7 2000	8 2000					Effective Mass (kg) Upper Limit Frequency (Hz)
VT400	10 2000	12 2000	14 2000	16 2000
VT500	20 2000	21 2000	23 2000	30 2000	32 2000
VT600		20 1000	30 1 800	33 1800	38 1800	38 2000
VT700			33 800	58 1500	69 2000	70 2000
VT800				60 800	70 1200	72 1500
VT900					85 1200	100 1200
VT1000						140 1000	150 1100	160 1100
VT1100						200 800	210 900	230 1000
VT1200	Effective Mass (kg) Upper Limit Frequency (Hz)					250 500	260 600	270 600
VT1500						330 400	350 400	400 400

Remark
1. The above-mentioned effective mass and usable frequency range indicate the specification of aluminum head expander. For magnesium type, the effective mass will be reduced to 65%, and the usable frequency will be reduced to 90% of the same model of aluminum type.

2. VT0303 is referred to a square head expander with its table size of 300×300mm. VT300 represents a round type product with its table diameter of 300mm.

3. Standard Hole
1) VT0303 (VT300)~VT0505 (VT500): 50×50mm square hole
2) VT0606 (VT600)~VT1212 (VT1200) and above: 100×100mm square hole

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