NYP泵是容積式内齧合齒輪泵，主動齒輪（外轉子(zǐ)）帶動被動齒輪（内轉子）旋轉時，不斷産生(shēng)封閉的空間，在吸油區齒輪(lún)逐漸脫離齧合而液(yè)體不斷地充滿齒(chǐ)間并被帶(dài)到出油區，齒輪在出油區(qū)進入齧合時液體被排出。兩個旋轉齒輪的共同作用，形成一個穩定的體積排量，沒有脈動。由于泵是(shì)完全對稱的(de)，泵可以反轉，液流方向也随(suí)之改變。但應注意(yì)，泵的轉向可能受(shòu)到密封或泵内其它結構(gòu)的限制，用戶有反轉(zhuǎn)要求時(shí)應在訂貨時(shí)做出說明(míng)
    該泵(bèng)的流量可根據(jù)液體粘度選擇合适的(de)轉速來調整。由于泵的流量取決于(yú)單轉排量和旋轉速度(dù)，單轉(zhuǎn)排量是泵軸旋轉360度的體積排量，實(shí)際(jì)上，單轉排量是在(zài)進出口壓(yā)差為零(líng)時泵轉(zhuǎn)一周的(de)流(liú)量。各種規格的泵因為幾何尺寸已定，隻有通過改變轉速來調整(zhěng)流量。轉速可由(yóu)改變馬達的轉速或減(jiǎn)速機的速比而改(gǎi)變，也可用變速馬達或可變(biàn)速減速機。

     該泵結構簡(jiǎn)單，适用範圍廣，可以輸送高粘度和低粘度的各種(zhǒng)液體，最高輸送粘度(dù)可達500000cst。溫(wēn)度範圍自-40—300℃,輸(shū)送液體可有潤滑性也可以沒有潤滑(huá)性。由于内外轉子齒數互為質數，任意(yì)兩齒之間的機會(huì)相等，因此齒的磨損非常均勻。    高粘度齒輪泵的吸油管道内徑應(yīng)足夠大，并避免(miǎn)狹(xiá)窄通道或急劇拐彎、減少彎(wān)頭，去除不必要的閥門(mén)、附件(jiàn)，盡可能地降低泵的安裝高度，縮短吸油管道的長度，以減少壓力損(sǔn)失。管接頭等元件的密封要(yào)良好，以防止空氣侵入，從(cóng)而控制氣穴與氣(qì)蝕的發生。止回閥(fá)與安全閥(fá)在齒輪泵的輸出管路上最好安裝一個止回閥。這樣在檢修(xiū)泵及輸出(chū)管道時(shí)，系統中的液體不(bú)會發生倒流。齒輪泵帶負荷停車時，亦可(kě)防止泵倒轉而在其輸出管道内産(chǎn)生局部真空。應當注意，出口止回閥不能裝反或出(chū)現卡死現象。高粘度泵的(de)出口管(guǎn)路上還應當設置(zhì)安全(quán)閥等保護裝置，這樣一旦泵的(de)出口通道發生(shēng)堵(dǔ)塞，就可以打開安全閥卸壓。安全閥可以與泵體或泵蓋鑄(zhù)成一(yī)體，也(yě)可以(yǐ)單獨裝配。對于(yú)需要正反轉的高(gāo)粘度齒輪泵，其進(jìn)出口管路上均需設置安全閥。High viscosity gear pump oil suction pipe diameter should be large enough, and to avoid the narrow channel, or a sharp turn, reducing elbow, remove unnecessary valves, fittings, as much as possible to reduce the installation height of pump, shorten the length of the oil suction pipe, in order to reduce the pressure loss.Components, such as pipe joint sealed well, in order to prevent the air intrusion, thus control air-pocket and the occurrence of cavitation.Check valve and relief valve on the output of the gear pump tube had better install a check valve.In the overhaul pump and output pipe, the system of fluid backflow will not occur.Gear pump to stop loading machine, can be in the output pipe to prevent pump reverse, and create a partial vacuum.It should be noted that the outlet check valve cannot be installed backwards or stuck.High viscosity of the pump outlet pipe also shall set up relief valve or other protective device on the road, so that once the clogging pump export channels, can open the relief valve pressure relief.The relief valve can be cast and pump body and pump cover, also can separate assembly.For high viscosity gear pump need positive &negative, import and export all needs to set up the line safety valve.

   高粘度泵是輸送高粘度液體的齒輪泵，應做到在較低的功耗、較少的洩漏、較大的壓力下輸出最多的流量。在确定(dìng)所要輸送的介(jiè)質時(shí)，應該嚴格遵循産品說明書上的規定，盡量使用廠(chǎng)家推薦的流體介質，并注意考慮系統的工作溫度(dù)範圍。當希望在某一較寬的溫(wēn)度(dù)範圍内使用時，輸送介質的(de)粘度指數應該高些。輸送介(jiè)質不僅是能量傳遞的中介，而且(qiě)也是潤滑、密封(fēng)及傳(chuán)熱(rè)介質。液體粘度過(guò)高會增加内摩擦阻(zǔ)力，降低輸出功率(lǜ)，浪(làng)費能量，并産生過高的系統溫度.高粘(zhān)度齒(chǐ)輪泵的出口管路(lù)上應當設置安全閥等保(bǎo)護裝置，這樣一旦泵的(de)出口通道發生堵塞，就(jiù)可以(yǐ)打開安全閥卸壓。對于需(xū)要正反轉的高粘度齒輪泵，其進出口管路上均需(xū)設置安全(quán)閥。High viscosity pump is conveying liquid with high viscosity gear pump, should be in lower power consumption, less leakage, under the pressure of large output the most traffic.When determining to conveying medium, we should strictly follow the provisions of the product manuals on use manufacturers recommend fluid as far as possible, and pay attention to consider the system operating temperature range.When you want to use in a wide temperature range, medium viscosity index should be higher.Medium is not only the energy transfer intermediary, but also lubrication, sealing and heat transfer medium.Liquid viscosity is too high will increase internal friction resistance, lower output power, waste of energy, and generate high temperature system. High viscosity gear pump outlet pipe shall set up relief valve or other protective device on the road, so once the clogging pump export channels, can open the relief valve pressure relief.For high viscosity gear pump need positive &negative, import and export all needs to set up the line safety valve.

    1、工作壓力的選定1, select the work pressure

　　高粘(zhān)度泵額(é)定的壓力是指泵(bèng)連續工作時的(de)最高許用(yòng)壓(yā)力，而其(qí)工作(zuò)壓力則決定于外部負載，安裝和調試的壽命與其工(gōng)作壓力直接相關。對于不頻繁工(gōng)作的齒輪泵，其(qí)工作壓力可取為(wéi)泵的額定壓力，考慮到産品質量不同，最好将額定壓力降低20%～30%使用。對于(yú)經常工作于較高壓力(lì)下的齒輪泵，其工作壓力應比泵的額定(dìng)壓力低1～2個壓力級。石油化(huà)工設(shè)備常常是24小(xiǎo)時連續運轉，這時泵的工作壓(yā)力應該取得比額定壓力低得多，且工作轉速也應該低于額定轉速。如果高粘度(dù)齒輪泵(bèng)的工(gōng)作壓力調整過高，則會使齒輪泵在(zài)超負荷(hé)下運行。High viscosity pump rated pressure refers to the maximum allowable pump continuous work pressure, and its working pressure is determined by the external load, installation and commissioning of life is directly related with work pressure.For not frequent work gear pump, the working pressure is desirable for the rated pressure of the pump, taking the quality into consideration, it is best to used pressure rated lower 20% ~ 30%.For often work under high pressure gear pump, the working pressure shall be lower than the rated pressure of the pump 1 ~ 2 pressure level.Petrochemical equipment are often 24 hours of continuous operation, and at this time of the pump working pressure should be obtained was much lower than the rated pressure, and the work speed should be lower than the rated speed.If the high viscosity gear pump high pressure adjustment, will make the pump running under overload.

　　2.安裝與試運轉(zhuǎn)2. Installation and commissioning

　　高粘度泵的支座或法(fǎ)蘭與其驅動電機應采用共同的安裝基礎，基礎(chǔ)、法蘭或支座均需具有(yǒu)足夠的剛度，以減(jiǎn)小齒輪泵運轉時産(chǎn)生的(de)振動和(hé)噪(zào)聲。電動機與齒輪(lún)泵須用彈性聯軸(zhóu)器連接，同(tóng)軸度小(xiǎo)于0.1毫米，傾斜角不(bú)得大于1度。安裝聯軸器時不得用錘敲打，以免傷害齒輪泵的齒輪等零件。若用帶(dài)輪、鍊輪等驅動時應(yīng)設托(tuō)架支承，以(yǐ)防主動齒輪軸承受徑(jìng)向力。緊固(gù)齒輪泵、電(diàn)動機的地腳螺釘(dìng)時，螺釘受力應均(jun1)勻，連接可(kě)靠。用手轉動(dòng)聯軸器時，應感覺到齒輪泵能夠輕松地轉動，沒有卡緊等異常現(xiàn)象出現，然後才可以配管。高粘度齒輪泵的吸(xī)油管(guǎn)道内徑應足夠大，并避免狹窄通道或急劇拐彎、彎頭，去除不必要的閥門(mén)、附件，盡可能(néng)地降低泵的安裝高度，縮短吸油管道的(de)長度，以減少壓力損失。管接頭等元件的密封要良(liáng)好，以防止空氣侵入，從(cóng)而控制氣穴與氣蝕的發生。在開(kāi)始運(yùn)轉前，往齒輪泵的殼體内灌滿(mǎn)待輸送的液體，便于(yú)安(ān)全動。若環境溫度低于冰點，應預先向(xiàng)泵(bèng)内通入(rù)熱蒸汽，進行預熱處理，然後才可啟動齒(chǐ)輪泵。齒輪泵的旋轉方向要與(yǔ)進、出油口相符。齒(chǐ)輪泵若是第一次(cì)運行，或長(zhǎng)期閑置後再使用，最好在(zài)空載或小(xiǎo)負荷情況下先跑合一小時左右。如果(guǒ)在(zài)跑合階段預先覺出異常溫升、洩漏、振(zhèn)動和噪聲時，應機檢查。高(gāo)粘度泵的出口管路上還應(yīng)當設置安全閥等保護裝置，這樣一(yī)旦泵的出口通(tōng)道發生堵塞，就可以(yǐ)打開安全閥卸壓。對(duì)于需要正反轉的高(gāo)粘度齒輪泵，其進出口管(guǎn)路(lù)上(shàng)均需設置安全閥。High viscosity pump bearing or flange and its drive motor should use common installation basis, foundation, flange or support all needs to have enough rigidity, to reduce the vibration of gear pump is running and noise.Motor and gear pump with elastic shaft coupling, coaxial degree is less than 0.1 mm, Angle shall not be greater than 1 degree.When installing coupling hammer shall not be used, in order to avoid damage gear and other parts of the gear pump.If use the belt wheel, wheel, etc, shall set bracket support, in case of driving gear bearing by the radial force.Ground screw fastening gear pump, motor, screw force should be uniform, reliable connection.Turn the coupling with the hand, should feel can easily turn the gear pump, no abnormal phenomenon such as clamping, then can be piping.High viscosity gear pump oil suction pipe diameter should be large enough, and to avoid the narrow channel, or a sharp bend, bend, remove unnecessary valves, fittings, as much as possible to reduce the installation height of pump, shorten the length of the oil suction pipe, in order to reduce the pressure loss.Components, such as pipe joint sealed well, in order to prevent the air intrusion, thus control air-pocket and the occurrence of cavitation.Before starting operation, to gear pump casing filled with liquid, easy to safety.If the environment temperature is below freezing, should advance to pump into the hot steam, preheating treatment, and then to start the pump.Direction of rotation of the gear pump, oil outlet in accord.Gear pump is the first run, or long-term idle before using, had better under the condition of no load or small load to run one hour or so.If in the running-in stage in advance the abnormal temperature rise, leakage, vibration and noise, should machine inspection.High viscosity of the pump outlet pipe also shall set up relief valve or other protective device on the road, so that once the clogging pump export channels, can open the relief valve pressure relief.For high viscosity gear pump need positive &negative, import and export all needs to set up the line safety valve.