【美国SEALMASTER代理,誉庭】NPD-30，新推荐泌阳(还是这家便宜,2023已更新)
其预紧变形量均为δa0，当外加轴向载荷Fa作用于轴上后，轴沿Fa方向移动了δa。轴承Ⅱ的外圈在弹簧作用下始终压紧内圈。由于弹簧的刚度与轴承的刚度相比很小，故可以近似地认为，在外加轴向载荷作用下，轴承Ⅰ的变形量增加δa，而轴承Ⅱ的变形量和预紧载荷保持不变。图4定压预紧时的载荷—变形曲线与定位预紧相比。
NP-8
NP-9
NP-10
NP-11
NP-12
NP-204
NP-13
NP-14
NP-15
NP-16
NP-205
NP-17
NP-18
NP-19
NP-20R
NP-206
NP-20
NP-21
NP-22
NP-23
NP-207
NP-24
NP-25
NP-208
NP-26
NP-27
NP-28
NP-209
NP-29
NP-30
NP-31
NP-32R
NP-210
NP-32
NP-33
NP-34
NP-35
NP-211
NP-36
NP-37
NP-38
NP-39
NP-212
NP-46
NP-47
NP-215
NPD-14
NPD-15
NPD-16
NPD-19
NPD-20
NPD-22
NPD-23
NPD-24
NPD-25
NPD-27
NPD-28
NPD-30
NPD-31
NPD-32
NPD-34
NPD-35
NPD-36
NPD-38
NPL-8
NPL-9
NPL-10
NPL-11
NPL-12
NPL-204
NPL-13
NPL-14
NPL-15
NPL-16
NPL-205
NPL-17
NPL-18
NPL-19
NPL-20R
NPL-206
NPL-20
NPL-21
NPL-22
NPL-23
NPL-207
NPL-24
NPL-25
NPL-208
NPL-26
NPL-27
NPL-28
NPL-209
NPL-29
NPL-30
NPL-31
NPL-32R
NPL-210
NPL-32
NPL-33
NPL-34
NPL-35
NPL-211
NPL-36
NPL-37
NPL-38
NPL-39
NPL-212
NPL-43
NPL-12T
NPL-15T
NPL-16T
NPL-17T
NPL-18T
NPL-19T
NPL-20RT
NPL-20T
NPL-22T
NPL-23T
NPL-24T
NPL-26T
NPL-27T
NPL-28T
NPL-31T
NPL-32RT
NPL-32T
NPL-34T
NPL-35T
NPL-36T
NPL-38T
NPL-39T
NPL-12T
NPL-15T
NPL-16T
NPL-17T
NPL-18T
NPL-19T
NPL-20RT
NPL-20T
NPL-22T
NPL-23T
NPL-24T
NPL-26T
NPL-27T
NPL-28T
NPL-31T
NPL-32RT
NPL-32T
NPL-34T
NPL-35T
NPL-36T
NPL-38T
NPL-39T
NP-204TMC
NP-205TMC
NP-206TMC
NP-207TMC
NP-208TMC
NP-209TMC
NP-210TMC
NP-211TMC
NP-212TMC
NP-12T
NP-15T
NP-16T
NP-18T
NP-19T
NP-20RT
NP-20T
NP-22T
NP-23T
NP-24T
NP-26T
NP-27T
NP-28T
NP-31T
NP-32RT
NP-32T
NP-34T
NP-35T
NP-36T
NP-38T
MP-15
MP-16
MP-305
MP-19
MP-20
MP-306
MP-23
MP-307
MP-24
MP-308
MP-27
MP-28
MP-309
MP-31
MP-32
MP-310
MP-35
MP-36
MP-311
MP-39
MP-40
MP-313
MP-43
MP-314
MP-47
MP-48
MP-315
MP-51
MP-52
MP-316
MP-55
MP-56
MP-63
MP-64
MP-320
MFP-31
MFP-32
MFP-310
MFP-35
MFP-36
MFP-311
MFP-39
MFP-40
MFP-313
MFP-43
MFP-314
MFP-47
MFP-48
MFP-315
MFP-51
MFP-52
MFP-316
MFP-55
MFP-56
MFP-63
MFP-64
MFP-320
MP-16T
MP-19T
MP-20T
MP-23T
MP-24T
MP-27T
MP-28T
MP-31T
MP-32T
MP-35T
MP-36T
SPM-19
SPM-23
SPM-27
SPM-28
SPM-31
SPM-35
SPM-39
SPM-40
MSFPD-31
MSFPD-32
MSFPD-35
MSFPD-36
MSFPD-39
MSFPD-40
MSFPD-43
MSFPD-47
MSFPD-48
MSFPD-51
MSFPD-52
MSFPD-55
MSFPD-56
MSFPD-63
MSFPD-64
MSFPD-71
MSFPD-79
MFPD-31
MFPD-35
MFPD-39
MFPD-40
MFPD-43
MFPD-47
MFPD-48
MFPD-55
MFPD-56
MFPD-63
MFPD-64
MFPD-71
MFPD-79
MFPD-80
MSPD-27
MSPD-28
MSPD-31
MSPD-32
MSPD-35
MSPD-36
MSPD-39
MSPD-40
MSPD-43
MSPD-47
MSPD-48
MSPD-55
MSPD-56
MSPD-63
MSPD-64
MSPD-71
MSPD-79
MPD-16
MPD-19
MPD-20
MPD-23
MPD-24
MPD-27
MPD-28
MPD-31
MPD-32
MPD-35
MPD-36
MPD-39
MPD-40
MPD-43
MPD-47
MPD-48
MPD-51
MPD-52
MPD-55
MPD-56
MPD-63
MPD-64
MST-15MST-16MST-305MST-19MST-20MST-306MST-23MST-307MST-24MST-308MST-27MST-28MST-309MST-31MST-32MST-310MST-35MST-36MST-311MST-39MST-40MST-313MST-43MST-314MST-47MST-48MST-315MST-51MST-52MST-316MST-63MST-64MST-320MST-16TMST-19TMST-20TMST-23TMST-24TMST-27TMST-28TMST-31TMST-32TMST-35TMST-36TST-12TST-15TST-16TST-18TST-19TST-20TST-22TST-23TST-24TST-25TST-26TST-27TST-28TST-31TST-32RTST-32TST-34TST-35TST-36TST-38TST-39TST-8ST-9ST-10ST-11ST-12ST-204ST-13ST-14ST-15ST-16ST-205ST-17ST-18ST-19ST-20RST-206ST-20ST-21ST-22ST-23ST-207ST-24ST-25ST-208ST-26ST-27ST-28ST-209ST-29ST-30ST-31ST-32RST-210ST-32ST-34ST-35ST-211ST-36ST-38ST-39ST-212ST-40ST-43ST-214ST-46ST-47ST-215ST-51ST-216ST-52ST-54ST-55TB-8TB-9TB-10TB-11TB-12TB-204TB-14TB-15TB-16TB-205TB-17TB-18TB-19TB-20RTB-206TB-20TB-21TB-22TB-23TB-207TB-24TB-25TB-208TB-26TB-27TB-28TB-209TB-30TB-31TB-32RTB-210TB-204TMCTB-205TMCTB-206TMCTB-207TMCTB-208TMCTB-209TMCTB-210TMCTB-12TTB-15TTB-16TB-18TTB-19TTB-20RTTB-20TTB-22TTB-23TTB-24TTB-26TTB-27TTB-28TTB-31TTB-32RT
大于阈值系数不变，而软阈值为小于阈值系数置为0，大于阈值部分减去阈值。从原理上看，去噪的关键在于阈值的选择，合理的阈值能够得到较好的去噪结果。目前常用的阈值为：λ==σ*sqrt(2log(N))，其中σ是噪声强度，N为信号长度。软硬阈值均存在一定的缺陷。因此提出了许多改进算法。如下图1所示，可以通过调整两轴承之间的隔套的宽度以获得一定的预紧量。图1定位预紧当两个相同型号的角接触球轴承成对安装时，其轴向载荷—变形的曲线如图2所示。预紧前，两轴承的内圈与内垫片间存在间隙，施加轴向预紧力Fa0后，轴向间隙消除，轴承内部产生的轴向（预紧）变形δaⅠ、δaⅡ均为δa0。