共查询到20条相似文献,搜索用时 109 毫秒
1.
煤炭港口堆场大型设备的斗轮和俯仰系统大部分都采用液压传动。现有液压系统在设计时对于液压系统发热、散热、冬季油箱加热等油温控制方面考虑比较周全,但对于管路、液压缸等执行部件冬季保温措施考虑不周,由于环境温度过低,造成的液压故障自寸有发生。文中针对冬季低温环境对液压系统的影响进行了分析讨论。 相似文献
2.
各种类型的柴油机在冬季或环境温度较低的情况下,燃油会因外界天气变化而发生一些物理变化.WM-D01型柴油机燃油加热装置的研制成功,满足了用户需求,解决了冬季柴油机启动困难和由于天气突变所带来的诸多不便.如果驾驶人员所加燃油不能满足外界气温要求,该装置能够帮助柴油机顺利启动.本文着重介绍了WM-D01型柴油机燃油加热装置的技术原理、功能特点、技术参数、结构组成以及该产品的应用前景和经济价值. 相似文献
3.
该装置主要用于解决冬季小、中型车辆,特别是柴油发动机客车启动预热问题。之前通常用燃油锅炉加热柴油发动机的冷却液,以启动柴油发动机并对其提供暖气。 相似文献
4.
南岳高山气象站称重式降水传感器冬季经常被冻结出现降水观测资料数据异常的现象,为解决这一问题,文章研制了温控称重式降水传感器防冻仪。它以智能温控系统为核心,配置加热带、温度监测传感器等部件,实现了当环境温度开始冰冻自动对传感器进行加热、高于温控阈值时自动断开停止加热。经过2016年整个冬季现场使用试验,结果表明,该仪器解决了固态降水数据在冻雨低温天气时的数据异常问题,具有很好的实用性、稳定性和可推广性。 相似文献
5.
6.
我厂地处山区,锅炉房供气不足,油温低,冬季加热点火困难,因而浪费燃料。针对这些问题,并根据我厂锻工车间的实际情况,我们选用DR16-500型旋流式重油加热器。通过加热器第二次加热后的油温比进油温度提高近0℃,一般可达120~150℃左右,加热2 min就能使重油达到理想的雾化温度。一、提高油温的优越性重油内力随温度升高而线性下降,因此可提高雾化程度,改善重油燃烧 相似文献
7.
针对目前采油厂冬季洗井方式的弊端,研制一套具有多种功能的洗井清蜡车,它将洗井设备加装在车辆二类底盘上。通过现场加热升温、增压循环,达到在不影响转油站冷输系统生产的情况下,对需要洗井作业的生产井进行连续加热升温、增压循环洗井,有效地解决了冷输过程中洗井的问题,提高了冷输的效果,并为冷输试验提供了一种行之有效的洗井试验方法。 相似文献
8.
风冷柴油机具有启动方便、运行经济,对环境适应性强等优点,因而受到用户的欢迎。然而,如果不能正确使用,就会故障频发,工效降低,甚至引发事故。为此,使用时应注意以下几点。 1.启动 工程机械上装用的风冷柴油机功率较大,为便于冬季启动,大都设有下述辅助起动装置。 (1)火焰加热塞。启动时,利用蓄电池的电能使进气管上的火焰加热塞 相似文献
9.
<正>冬季气温低,柴油机启动困难,不少机手为快速启动柴油机,经常采用不当的"巧法"启动,殊不知,这些"巧法"会减少柴油机的使用寿命。1.用明火加热油箱。用明火加热油箱,不仅会破坏机体表面的油漆,而且容易烧坏塑料油管,造成漏油,甚至会因油箱内气体急剧膨胀而发生爆炸,导致机体毁 相似文献
10.
《气象水文海洋仪器》2020,(2)
高海拔地区冬季由于冻雨常会造成风向风速传感器被冻结,导致探测数据的缺测。基于单片机的强大功能,文章设计制作了一种可对风向风速进行自动加热的防冻装置,整个装置以单片机为核心控制器,主要包括单片机控制电路、继电器驱动电路、温度采集电路,电热丝控制电路、温度显示电路等模块。通过模拟试验与现场实测,证明该系统运行可靠,有效解决了冬季风向风速传感器被冻结的问题。 相似文献
11.
12.
A. A. Shul’zhenko M. B. Modestov B. A. Mnev 《Journal of Machinery Manufacture and Reliability》2011,40(4):393-399
Calculation features of a thermal field of a woven heater located in layers of clothing are considered. The urgency of this
work is determined by the expansion of the creation of winter clothing, special-purpose clothing and medical production with
electrical heating. Mathematical relations for calculating the effect of a woven electrical heater located in heat-insulated
clothes provided in the form of a cylindrical model are received. The work is of interest to a wide variety of professionals
involved in the development of winter clothes and other products with electrical heating. 相似文献
13.
14.
The operation performance measurement of the air source heat pumps in the field, in which conditions are complicated and the accuracy could not be ensured, is very crucial for its performance evaluation and improvement. In this investigation, a novel method for measuring the heating capacity of the air source heat pump is established. An auxiliary electric heater is installed along the pipeline between the compressor and the condenser, and the refrigerant temperature difference caused by the heater is gathered to calculate the refrigerant mass flow rate based on the energy conservation. The heating capacity is calculated with the measured data of the refrigerant enthalpy at the inlet and outlet of the condenser and the refrigerant mass flow rate of the compressor discharge pipe. The validation results in laboratory tests show that the measured heating capacity accuracy is within 9.2%. It is also found that the impact of the novel test method on the heating capacity of the air source heat pumps is below 1.7%, and the power consumption of the tested units is increasing of within 1.8% compared with it when the electric heater is off. The refrigerant enthalpy difference method with an electric heater presented in this research can be applied to measure the heating capacity of different air source heat pump air heaters accurately in the field, which will be much helpful to improve the performance for cleaning heating in northern China. 相似文献
15.
经特殊设计的石油平台燃料型加热器具有安全可靠、节能高效、抗海水Cl-腐蚀和智能化控制等特点。与"燃气轮机发电-电加热"的原油输送方式相比,热效率成倍提高,经济效益十分显著。在海洋油田井口平台原油加热海底输送方面有较好的应用前景。就海洋石油平台燃料型加热器的结构特点、Cl-腐蚀防护措施以及加热器控制系统的设计进行了介绍。 相似文献
16.
17.
18.
潘彩霞 《机械设计与制造工程》2012,(10):69-71,74
针对传统的机械式电热水器控制精度低、可靠性差等缺点,设计了家用电热水器智能温度控制器。该智能温度控制器以AVR单片机为核心,利用了数字传感器DS18B20和时钟芯片DS1302等元件,实现了智能加热、智能控温、LED及LCD显示等功能。整个系统充分利用了AVR单片机的内部资源,最大程度地简化了硬件电路,使系统具有较高的性价比和可靠性。 相似文献
19.
A. A. Shul’zhenko B. M. Modestov M. B. Modestov 《Journal of Machinery Manufacture and Reliability》2008,37(4):397-401
Processes in the human-woven heater-thermally insulating layers of a belt with electric heating-environment system are considered. The temperature distribution in the system with contact heating for switched-off and switched-on heaters is described. The reaction of the system on switching on the heater that was obtained experimentally using woven heaters is shown. The results of the study can be used in the development of a wide range of products providing contact heating of biological objects. 相似文献