Hiwin IM-2-13, Инструкция по сборке

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Assembly Instruction Configuration
Torque Motor TM-Komponenten-04-0-EN-2108-MA Page 31 of 84
3.6 Coolant selection
Coolant needs to be prepared by the user. Anti-corrosion coolant needs to be used for HIWIN torque motor. The
design and performance test of HIWIN torque motors are based on pure water. If customers use oil as the
coolant, the heat that can be taken away by the same flow rate will be reduced and so will the motor power,
otherwise the flow rate should be increased to keep the motor power. Please contact HIWIN for related
information.
The coolant must be processed and filtered in advance to avoid blocking the cooling channel. The maximum
allowable size of particles in the coolant is 100 microns, and it must not freeze. If untreated water is used, it
may cause failure or damage due to deposition, algae growth or formation of slime, and corrosion, such as:
reduced thermal conductivity, pressure loss due to cross-sectional area reduction, and blockage of various
components. And for water quality, at the least the following requirements must be met:
1 Chloride and sulfate must be less than 100 ppm.
2 The solute of mineral salt must be less than 2000 ppm.
3 6,5
≦
pH
≦
9,5
If an anti-corrosion agent is added (the basic raw material is Ethylene Glycol Monoethyl Ether), it must not react
with water and the freezing point must be at least -5
℃
. The anti-corrosion agent must be compatible with the
connectors and the materials in the cooling system including the O-ring of the motor. Please confirm with the
supplier of the agent! It is generally recommended that the concentration should not exceed 50 %.
Apart from oil, adding various solvents to water will also cause its specific heat capacity (
C
p
) to decrease
(please confirm the features with the supplier). It is necessary to reduce the motor power accordingly. For
example, when using Glycol as an additive, please refer to the Table 3.2 below:
Table 3.2: The specific heat capacity of Ethylene Glycol based water solutions at various temperatures
Specific heat capacity
𝐂𝐂
𝐩𝐩
(
𝐊𝐊𝐊𝐊 / 𝐤𝐤𝐤𝐤 𝐊𝐊
)
Concentration of
Ethylene Glycol
(Weight %) Temperature
0
℃
10
℃
20
℃
30
℃
0 4,203 4,195 4,189 4,185
10 4,071 4,079 4,087 4,096
20 3,918 3,935 3,951 3,968
30 3,764 3,807 3,807 3,828
40 3,595 3,647 3,647 3,674
50 3,412 3,473 3,473 3,504