破(Po)坏(Huai)性(Xing)液(Ye)压(Ya)泵(Beng)试(Shi)验(Yan)台(Tai)

关(Guan)于(Yu)液(Ye)压(Ya)泵(Beng)站(Zhan)定(Ding)制(Zhi)的(De)缓(Huan)冲(Chong)，(?)其(Qi)浸(Jin)染(Ran)及(Ji)具(Ju)体(Ti)缓(Huan)冲(Chong)装(Zhuang)置(Zhi)的(De)工(Gong)作(Zuo)道(Dao)理(Li)不(Bu)难(Nan)理(Li)解(Jie)。(?)其(Qi)难(Nan)点(Dian)主(Zhu)要(Yao)是(Shi)缓(Huan)冲(Chong)压(Ya)力(Li)，(?)出(Chu)格(Ge)是(Shi)大(Da)缓(Huan)冲(Chong)压(Ya)力(Li)的(De)计(Ji)较(Jiao)。(?)事(Shi)实(Shi)上(Shang)，(?)液(Ye)压(Ya)泵(Beng)站(Zhan)定(Ding)制(Zhi)在(Zai)缓(Huan)冲(Chong)时(Shi)有(You)三(San)种(Zhong)能(Neng)量(Liang)在(Zai)缓(Huan)冲(Chong)、(?)制(Zhi)动(Dong)后(Hou)被(Bei)背(Bei)压(Ya)腔(Qiang)(缓(Huan)冲(Chong)腔(Qiang))所(Suo)领(Ling)受(Shou)：(?)①(?)是(Shi)液(Ye)压(Ya)能(Neng)Ep，(?)其(Qi)值(Zhi)为(Wei)Ep =p1 A1 Lc(式(Shi)中(Zhong)P1为(Wei)高(Gao)压(Ya)腔(Qiang)的(De)压(Ya)力(Li)，(?)A1为(Wei)高(Gao)压(Ya)腔(Qiang)的(De)有(You)效(Xiao)承(Cheng)压(Ya)面(Mian)积(Ji)，(?)Lc为(Wei)背(Bei)压(Ya)腔(Qiang)的(De)缓(Huan)冲(Chong)长(Chang)度(Du))。(?)②(?)是(Shi)动(Dong)能(Neng)Em ，(?)其(Qi)值(Zhi)为(Wei)Em =mv2/2(式(Shi)中(Zhong)m为(Wei)所(Suo)有(You)举(Ju)动(Dong)部(Bu)件(Jian)的(De)质(Zhi)量(Liang)，(?)v为(Wei)举(Ju)动(Dong)部(Bu)件(Jian)的(De)速(Su)度(Du))。(?)③(?)是(Shi)反(Fan)向(Xiang)的(De)摩(Mo)擦(Ca)能(Neng)Ef，(?)其(Qi)值(Zhi)为(Wei)Ef=FfLc(式(Shi)中(Zhong)Ff为(Wei)反(Fan)向(Xiang)摩(Mo)擦(Ca)力(Li))。(?)此(Ci)时(Shi)，(?)三(San)种(Zhong)能(Neng)量(Liang)，(?)尤(You)其(Qi)是(Shi)动(Dong)能(Neng)在(Zai)极(Ji)短(Duan)的(De)时(Shi)间(Jian)内(Nei)全(Quan)部(Bu)转(Zhuan)化(Hua)成(Cheng)背(Bei)压(Ya)腔(Qiang)液(Ye)体(Ti)的(De)压(Ya)力(Li)能(Neng)E2，(?)致(Zhi)使(Shi)背(Bei)压(Ya)腔(Qiang)压(Ya)力(Li)升(Sheng)高(Gao)，(?)形(Xing)成(Cheng)缓(Huan)冲(Chong)压(Ya)力(Li)。(?)若(Ruo)令(Ling)背(Bei)压(Ya)腔(Qiang)有(You)效(Xiao)承(Cheng)压(Ya)面(Mian)积(Ji)为(Wei)人(Ren)，(?)缓(Huan)冲(Chong)压(Ya)力(Li)为(Wei)pc，(?)则(Ze)有(You)E1=Ep+Em-Ef=E2=Pc·(?)Ac·(?)Lc(E1为(Wei)高(Gao)压(Ya)腔(Qiang)总(Zong)的(De)机(Ji)械(Xie)能(Neng)、(?)即(Ji)三(San)种(Zhong)能(Neng)量(Liang)之(Zhi)和(He))，(?)所(Suo)以(Yi)缓(Huan)冲(Chong)压(Ya)力(Li)为(Wei)pc=E1/AcLc。(?)在(Zai)采(Cai)用(Yong)节(Jie)约(Yue)口(Kou)可(Ke)调(Diao)式(Shi)的(De)缓(Huan)冲(Chong)装(Zhuang)置(Zhi)中(Zhong)，(?)缓(Huan)冲(Chong)过(Guo)程(Cheng)中(Zhong)的(De)缓(Huan)冲(Chong)阻(Zu)尼(Ni)是(Shi)固(Gu)定(Ding)不(Bu)变(Bian)的(De)，(?)而(?)在(Zai)缓(Huan)冲(Chong)、(?)制(Zhi)动(Dong)开(Kai)始(Shi)时(Shi)举(Ju)动(Dong)部(Bu)件(Jian)的(De)速(Su)度(Du)是(Shi)高(Gao)的(De)(今(Jin)后(Hou)才(Cai)逐(Zhu)渐(Jian)降(Jiang)低(Di))，(?)所(Suo)以(Yi)在(Zai)制(Zhi)动(Dong)开(Kai)始(Shi)时(Shi)发(Fa)生(Sheng)的(De)冲(Chong)击(Ji)力(Li)也(Ye)大(Da)(今(Jin)后(Hou)才(Cai)逐(Zhu)渐(Jian)减(Jian)弱(Ruo))。(?)即(Ji)在(Zai)缓(Huan)冲(Chong)，(?)制(Zhi)动(Dong)过(Guo)程(Cheng)中(Zhong)缓(Huan)冲(Chong)压(Ya)力(Li)是(Shi)由(You)大(Da)到(Dao)小(Xiao)变(Bian)化(Hua)的(De)，(?)非(Fei)定(Ding)值(Zhi)。(?)而(?)上(Shang)述(Shu)pc值(Zhi)是(Shi)从(Cong)能(Neng)量(Liang)转(Zhuan)换(Huan)角(Jiao)度(Du)换(Huan)算(Suan)出(Chu)的(De)理(Li)论(Lun)值(Zhi)，(?)即(Ji)平(Ping)均(Jun)值(Zhi)，(?)称(Cheng)为(Wei)平(Ping)均(Jun)缓(Huan)冲(Chong)压(Ya)力(Li)。(?)大(Da)缓(Huan)冲(Chong)压(Ya)力(Li)呈(Cheng)此(Ci)刻(Ke)制(Zhi)动(Dong)开(Kai)始(Shi)时(Shi)的(De)速(Su)度(Du)高(Gao)时(Shi)。(?)若(Ruo)近(Jin)似(Si)的(De)认(Ren)为(Wei)由(You)举(Ju)动(Dong)部(Bu)件(Jian)的(De)动(Dong)能(Neng)所(Suo)转(Zhuan)化(Hua)的(De)那(Na)部(Bu)门(Men)压(Ya)力(Li)是(Shi)呈(Cheng)线(Xian)性(Xing)纪(Ji)律(Lu)下(Xia)降(Jiang)的(De)，(?)则(Ze)大(Da)的(De)冲(Chong)击(Ji)压(Ya)力(Li)(缓(Huan)冲(Chong)压(Ya)力(Li))Pcmax。(?)即(Ji)大(Da)的(De)冲(Chong)击(Ji)压(Ya)力(Li)可(Ke)近(Jin)似(Si)地(Di)等(Deng)于(Yu)平(Ping)均(Jun)缓(Huan)冲(Chong)压(Ya)力(Li)与(Yu)举(Ju)动(Dong)部(Bu)件(Jian)动(Dong)能(Neng)所(Suo)转(Zhuan)化(Hua)的(De)压(Ya)力(Li)之(Zhi)和(He)。(?)在(Zai)液(Ye)压(Ya)泵(Beng)站(Zhan)定(Ding)制(Zhi)强(Qiang)度(Du)校(Xiao)核(He)时(Shi)，(?)必(Bi)需(Xu)满(Man)足(Zu)大(Da)冲(Chong)击(Ji)力(Li)要(Yao)小(Xiao)于(Yu)缸(Gang)筒(Tong)材(Cai)料(Liao)的(De)试(Shi)验(Yan)压(Ya)力(Li)这(Zhe)一(Yi)条(Tiao)件(Jian)。(?)