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Water-based hydraulic damping medium and preparation method thereof

A hydraulic damping and medium technology, applied in the field of elevator buffering, can solve problems such as low freezing point and high viscosity index, and achieve the effects of low cost, strong environmental adaptability and not easy environmental pollution

Inactive Publication Date: 2021-02-19
上海淳信机电科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a water-based hydraulic damping medium and a preparation method thereof. The water-based hydraulic damping medium solves the main defects of silicon-based mineral oil, and has a lower freezing point and a higher viscosity index, and is more Adapt to the working environment of the elevator buffer

Method used

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  • Water-based hydraulic damping medium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of a water-based hydraulic damping medium is as follows:

[0041] (1) Weigh 0.3g of sodium carboxymethylcellulose with a balance, mix 20ml of deionized water with sodium carboxymethylcellulose as a dispersant at room temperature (24-28°C), and then add 8ml of anticoagulant ethylene glycol , stirred at room temperature for 30 min, and the stirring speed was 300 r / min.

[0042] (2) Add 0.6g of nano-SiC (particle size 90nm) to the stable solution obtained in the previous step, and stir for 60min at a temperature of 80°C at a stirring speed of 200r / min to obtain the first suspension.

[0043] (3) Add 0.1 g of the anti-sedimentation stabilizer montmorillonite to the first suspension generated in the previous step, stir at room temperature (24-28°C) for 30 minutes at a stirring speed of 500 r / min, and obtain the second suspension liquid.

[0044] (4) Add 0.1 g of antifoaming agent triacetamide into the second suspension, stir at room temperature (24-28°...

Embodiment 2

[0048] According to the preparation method of Example 1, the amount of SiC added was increased to 1.2g, the amount of deionized water added was 20ml, 8ml of coagulation inhibitor ethylene glycol was also added in step 1, and the particle size of SiC was adjusted to 20nm at the same time. Other conditions No change, the nano-SiC water-based hydraulic damping medium was prepared.

[0049] The nano-SiC water-based hydraulic damping medium prepared in Example 1 and Example 2 is subjected to viscosity measurement, and the measurement method refers to the national standard GB / T3141-94.

[0050] After testing, the viscosity of the nano-SiC water-based hydraulic damping medium prepared in Example 1 is 1.31 mPa·s, and the viscosity of the nano-SiC water-based hydraulic damping medium prepared in Example 2 is 2.15 mPa·s. The above viscosities can meet the buffering requirements of elevator buffers with a rated load below 1250kg.

[0051] The nano-SiC water-based hydraulic damping mediu...

Embodiment 3

[0054] According to the preparation method of embodiment 1, adjust the consumption of anticoagulant ethylene glycol, and investigate the freezing point of damping medium, the results are shown in Table 1.

[0055] Table 1

[0056]

[0057]It can be seen from Table 1 that when ethylene glycol is used as the anticoagulant, the content of ethylene glycol in the range of 22% to 37% has a lower freezing point, which is suitable for the working environment of the elevator. For economy, determine the component content of 27% to 32%.

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Abstract

The invention belongs to the technical field of elevator buffering, and particularly relates to a water-based hydraulic damping medium and a preparation method thereof. The water-based hydraulic damping medium comprises the following components in percentage by weight: 60-71 (wt)% of water; 27 to 32 (wt)% of a coagulation inhibitor; 1-4 (wt)% of a nano additive; 0.3-1.2 (wt)% of a dispersing agent; 0.2-1.5 (wt)% of an anti-settling stabilizer; and 0.2-1 (wt)% of an antifoaming agent. The water-based hydraulic damping medium overcomes the defects that traditional silicon-based mineral oil serving as a damping medium is high in pollution, high in cost, easy to burn, not easy to transport and the like, and meanwhile the water-based hydraulic damping medium prepared through the method has a low freezing point and a high viscosity index and can adapt to the working environment of an elevator buffer.

Description

technical field [0001] The invention belongs to the technical field of elevator buffering, and in particular relates to a water-based hydraulic damping medium and a preparation method thereof. Background technique [0002] The elevator buffer is installed at the bottom of the elevator shaft. When the elevator car or counterweight falls, it can play the role of final buffer, stop and protection, so as to prevent the car or counterweight from directly hitting the bottom. Currently commonly used elevator buffers are hydraulic buffers, and its hydraulic medium is made of silicon-based mineral oil, which can only be applied to traditional metal hydraulic buffers. The main defects of the current hydraulic shock absorber are: (1) The cost of materials is high, and the raw materials come from increasingly scarce mineral oil; (2) It is not easy to transport, because liquid oil is a high-risk flammable liquid, its transportation is strictly controlled by the state, and must be It is ...

Claims

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Application Information

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IPC IPC(8): C10M173/02C10N40/08C10N30/02
CPCC10M173/02C10M2201/10C10M2201/105C10M2201/062C10M2201/103C10M2207/022C10M2207/124C10M2209/12C10M2215/08C10M2215/04
Inventor 刘仕国刘鹏左晅子刘奕哲
Owner 上海淳信机电科技股份有限公司
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