【摘要】：隨著市場經(jīng)濟(jì)的高速發(fā)展,大型貨車的載貨量越來越大,卸貨用換向液壓閥的質(zhì)量直接影響著貨車的自動(dòng)卸貨的安全性和穩(wěn)定性,要求換向液壓閥有30MPa以上的耐壓,并且對其泄漏性能要求嚴(yán)格。如果換向液壓閥質(zhì)量不合格,在卸貨過程中就有可能出現(xiàn)翻車等現(xiàn)象。因此,對這一類超高壓控制用換向液壓閥的質(zhì)量與性能檢測顯得非常重要。傳統(tǒng)的質(zhì)量檢測方法主要以手工裝夾,人工操作換向,通過讀取機(jī)械儀表的方式進(jìn)行閥體的質(zhì)量檢測,一般不對數(shù)據(jù)進(jìn)行處理、記錄與分析,無數(shù)據(jù)的可追溯性。這種落后的檢測方式已不能滿足現(xiàn)代生產(chǎn)的質(zhì)量需求,設(shè)計(jì)并實(shí)現(xiàn)用于檢測卸貨用超高壓液壓換向閥、實(shí)現(xiàn)檢測的自動(dòng)化裝夾并精確檢測、以及實(shí)現(xiàn)檢測數(shù)據(jù)的可追溯查詢成為企業(yè)迫切需要解決的技術(shù)課題。本文充分利用先進(jìn)的液壓CAT技術(shù),研制了一種可用于同一類型多種不同產(chǎn)品的液壓閥檢測試驗(yàn)臺,并針對閥體內(nèi)部結(jié)構(gòu)進(jìn)行了流體分析,優(yōu)化了檢測系統(tǒng)的結(jié)構(gòu),從而提高了換向液壓閥的質(zhì)量,提升了大型貨車卸貨時(shí)的安全性能。 首先,根據(jù)系統(tǒng)要求,并結(jié)合TS16949關(guān)于多路換向閥質(zhì)量檢測規(guī)定,制定了合理的試驗(yàn)方案、試驗(yàn)原理和試驗(yàn)步驟,加工出可用于檢測卸貨用換向液壓閥的試驗(yàn)臺；其次,針對計(jì)算機(jī)測試系統(tǒng)原理,設(shè)計(jì)了性價(jià)比較高的控制系統(tǒng),合理選型了試驗(yàn)臺所需的硬件、分析了裝夾液壓系統(tǒng)液壓缸的運(yùn)動(dòng)性能；再次,針對卸貨用換向液壓閥腔體的流場結(jié)構(gòu)進(jìn)行了仿真分析,解決了液壓沖擊、液壓元件運(yùn)動(dòng)溫升與噪音問題；最后,利用Delphi7.0軟件開發(fā)了人機(jī)友好的自動(dòng)檢測軟件系統(tǒng),并對每個(gè)模塊的功能、檢測方法進(jìn)行了簡要說明,對全文的研究工作進(jìn)行了總結(jié),分析了本試驗(yàn)臺存在的不足,并對試驗(yàn)臺以后的優(yōu)化設(shè)計(jì)工作進(jìn)行了展望。 該換向液壓閥質(zhì)量檢測試驗(yàn)臺已成功用于武漢東江閥業(yè)制造有限公司液壓換向閥的出廠檢測,為其液壓閥檢測提供了性能穩(wěn)定、質(zhì)量可靠的試驗(yàn)平臺。經(jīng)過試運(yùn)行后,該檢測試驗(yàn)臺滿足了該企業(yè)的各項(xiàng)檢測需求,并大大提高了質(zhì)量檢測的工作效率,為企業(yè)創(chuàng)造了巨大的經(jīng)濟(jì)效益。
[Abstract]:With the rapid development of market economy, the loading capacity of large freight cars is increasing. The quality of reversing hydraulic valves for unloading has a direct impact on the safety and stability of automatic unloading of freight cars. It is required that the reversing hydraulic valves have the pressure above 30MPa. And strict requirements for its leakage performance. If the quality of reversing hydraulic valve is not up to standard, it is possible to turn over during unloading. Therefore, it is very important to test the quality and performance of this kind of reversing hydraulic valve. The traditional quality inspection methods are mainly manual clamping, manual operation and commutation, and the quality of valve body is detected by reading mechanical instruments. Generally, the data are not processed, recorded and analyzed, and no traceability of data is found. This backward detection method can no longer meet the quality requirements of modern production. The design and implementation of ultra-high pressure hydraulic reversing valve for testing and unloading, automatic clamping and accurate detection are realized. And how to realize the traceability query of inspection data becomes an urgent technical problem that enterprises need to solve. This paper makes full use of the advanced hydraulic CAT technology to develop a kind of hydraulic valve testing test-bed which can be used for the same type and many different products. The fluid analysis is carried out according to the internal structure of the valve body, and the structure of the testing system is optimized. Thus, the quality of reversing hydraulic valve is improved, and the safety performance of large truck is improved when unloading. First of all, according to the system requirements and combined with the quality inspection regulation of the multi-way reversing valve in TS16949, the reasonable test plan, test principle and test procedure are worked out, and the test bench can be used to detect the reversing hydraulic valve for unloading. According to the principle of computer test system, the control system with high performance-to-price ratio is designed, the hardware needed for the test bench is selected reasonably, and the motion performance of the hydraulic cylinder of the clamping hydraulic system is analyzed. The flow field structure of reversing hydraulic valve chamber for unloading is simulated and analyzed, which solves the problems of hydraulic shock, temperature rise and noise of hydraulic components. Finally, a man-machine friendly automatic detection software system is developed by using Delphi7.0 software. The function and testing method of each module are briefly explained, the research work of the full text is summarized, the shortcomings of the test bed are analyzed, and the optimization design work after the test bed is prospected. The reversing hydraulic valve quality test bench has been successfully used in the factory inspection of the hydraulic reversing valve of Wuhan Dongjiang Valve Manufacturing Co., Ltd., which provides a stable and reliable test platform for the hydraulic valve detection. After trial operation, the test bench meets the requirements of the enterprise, and greatly improves the efficiency of the quality inspection, and creates huge economic benefits for the enterprise.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH137

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