螺旋千斤顶说明书

2015-01ENInstruction manualInstallation – Operation – Maintenance – InspectionZIMM Screw JacksZ-5 to Z-1000GSZ-2 to GSZ-100Translation of the original instruction manualPublisherZIMM Maschinenelemente GmbH + Co KGMillennium Park 36890 Lustenau/AustriaTel.: 0043 (0) 5577 806-0Fax: 0043 (0) 5577 806-8e-mail:************Internet: http://www.zimm.euAuthorZIMM Maschinenelemente GmbH + Co KGIssue date2015-01Version1.2Copyright© 2015 ZIMM Maschinenelemente GmbH + Co KGWe reserve the right to make changes to technical aspects and contentLegal noticesThe contents of this instruction manual must be kept confidential. It is intended only for use by company personnel.Reproduction or distribution and release of this instruction manual to third parties is prohibited. Offenders are liable to pay damages.The ZIMM Maschinenelemente GmbH + Co KG accepts no liability for damages arising from disregard of this instruction manual.ZIMM Screw Jack 1 About this documentContents1About this document (5)1.1Use of this instruction manual (5)1.2Symbols and identifying marks (5)2Safety (6)2.1Use for the intended purpose (6)2.2Duties of the operating company (6)3Scope of supply (7)4Description of the product (7)4.1Overview (7)4.2Rating plate (8)4.3Versions/variants (9)4.4Grease nipple (10)5Transport and storage (11)5.1Transport (11)5.2Storage (13)6Installation (14)6.1Installing screw jacks and bevel gear drives (15)6.2Fitting the couplings and connecting shafts (16)6.3Fitting the motor (18)6.4Connecting the electrical components (19)6.5Trial running (21)6.6Correcting the alignment (22)6.7Commissioning (23)6.8Running-in phase (23)7Operation and maintenance (24)7.1Inspection (24)7.2Lubrication (25)7.3Troubleshooting (31)8Decommissioning and recommissioning (33)9Repair and replacement (33)10Disposal (33)11Declaration of incorporation (34)1 About this document ZIMM Screw Jack 12Appendix: Inspection certificate (35)ZIMM Screw Jack 1 About this document1 About this document1.1 Use of this instruction manualThis instruction manual forms part of the ZIMM Screw Jack.→Before using the equipment read the instruction manual carefully.→Keep the instruction manual safe throughout the working life of theequipment.→Keep the instruction manual available to operating and maintenancepersonnel at all times.→Pass the instruction manual to any subsequent owner or user of theequipment.→Keep the instruction manual updated with any supplements issuedby the manufacturer.1.2 Symbols and identifying marksTab. 1:Symbols and identifying marks2 Safety ZIMM Screw Jack2 SafetyThe ZIMM Screw Jack has been produced to modern standards andrecognised safety regulations. Nevertheless hazards to life and limb ofthe users or third parties, or risks of damage to the ZIMM Screw Jackand other property may arise during use.→The ZIMM Screw Jack may be used only when it is in technicallygood condition and in compliance with the instruction manual.→Have any defects rectified without delay.→Do not perform any unauthorised modifications to the ZIMM ScrewJack.→Fit only original spare parts from ZIMM MaschinenelementeGmbH + Co KG.2.1 Use for the intended purposeThe ZIMM Screw Jack is suitable only for lifting, lowering, tilting andadvancing movements within the specified lifting capacity ranges.Responsibility to ensure correct use lies with the user.Screw jacks may be used only in the context and within the limitsspecified in our catalogues and brochures.To ensure compliance with the statutory limits for electromagneticcompatibility, the ZIMM Screw Jack may be used only within industrialapplications as defined in EN 50 081-2.Use for any purpose other than these intended purposes constitutesimproper use.If in doubt regarding the application of the ZIMM Screw Jack, consultZIMM Maschinenelemente GmbH + Co KG before proceeding.2.2 Duties of the operating company→Ensure that the ZIMM Screw Jack is operated and maintained onlyin compliance with this instruction manual and the rules andregulations applicable in the country of use.→Ensure that the personnel–responsible for operating the ZIMM Screw Jack are authorised,–are trained and qualified for the respective work,–have read and understood this instruction manual,–know the applicable safety rules and–wear personal safety equipment(safety gloves, safety helmet and safety shoes).ZIMM Screw Jack 3 Scope of supply3 Scope of supplyThe ZIMM Screw Jack is delivered in sufficiently secure packaging toprevent possible damage in transit.The scope of supply of the ZIMM Screw Jack includes the followingparts:•ZIMM Screw Jack•This instruction manual•Further parts as listed on the delivery note4 Description of the product4.1 OverviewFig. 1:Overview ZIMM Screw JackA to F: Faces of the ZIMM Screw Jack. For the Z series this is alsodisplayed on the casing.4 Description of the product ZIMM Screw Jack4.2 Rating plateFig. 2:Example of a rating plate1 ZIMM contact data2 Type designation3 Maximum static load gearbox(spindle etc. not considered) 4 Gear ratio 5 Rated speed6 max. speed7 Serial number8 Serial number asData Matrix CodeZIMM Screw Jack 4 Description of the product4.3Versions/variants1 Travelling nut2 Trapezoidal screwspindle TR3 Housing, Z series4 Drive shaft5 Spindle lubrication6 Limit switch7 Protective tube1 Ball screw spindle KGT2 Spindle lubrication3 Gearbox for ball screw drive KGT4 Description of the product ZIMM Screw Jack1 Electrical or opticalmonitoring2 Gearbox with integral safetynut SIFA3 Safety nut SIFA4 Electrical monitoring1 Housing, GSZ series4.4 Grease nippleS and R versions of the ZIMM Screw Jack are fitted with grease nipples,which allow simple and clean greasing of the spindle (apart from theflanged nut FM).ZIMM Screw Jack 5 Transport and storage5 Transport and storage5.1 Transport5 Transport and storage ZIMM Screw JackFig. 3: Examples for transporting the S version → When lifting with a crane, attach the slings to the lifting pointsprovided.→ When lifting the ZIMM Screw Jack for transport, spread the weightas evenly as possible across all the lifting points.Fig. 4: Examples for transporting the R versionS versionR versionZIMM Screw Jack 5 Transport and storage Securing for transportFor secure attachment, insert ring bolts or ring nuts to the gearbox.5.2 Storage→For other storage conditions and storage times:Consult ZIMM Maschinenelemente GmbH + Co KG.6 Installation ZIMM Screw Jack6 InstallationZIMM Screw Jack 6 Installation6.1 Installing screw jacks and bevel gear drives✓Ensure that the spindle of the ZIMM Screw Jack or on the ZIMMScrew Jack cannot be exposed to lateral loads.Fig. 6:Side forces on the spindle are not permissible.Fig. 7:Flatness, parallelism and angular accuracy6 Installation ZIMM Screw Jack1. Install the ZIMM Screw Jack and ensure straight alignment for thespindle attachments.2. Install the ZIMM Screw Jack with bolts, tighten the installation bolts.3. Install the spindle attachment with bolts, tighten the installationbolts.Fig. 8:Exceptions: Maximum inclination angle for self-aligningnuts (PM) is 3°, install all other nuts at right angles.Bevel gear driveThe T version can be turned round to change the direction of rotation.→Check the direction of rotation at installation.6.2 Fitting the couplings and connecting shafts✓The screw jacks to be connected must have been fully installed.✓The bevel gear drives must be installed where appropriate.1. Place the connecting shaft on the shaft extensions (ZIMM ScrewJack or bevel gear drives). Check that the gearboxes are correctlylevelled.ZIMM Screw Jack 6 Installation2. Secure the coupling half shells with attachment bolts tightened tothe following torques:Fig. 10:Installation of connecting shaftsPull the couplings KUZ (couplings without half shells) on to the shaftextensions. Tighten the set screw to the following torques:For increased secu rity the set screw can be secured using “mediumstrength” thread locking agent.6 Installation ZIMM Screw Jack6.3 Fitting the motor✓The screw jack must be installed.Fig. 11:Installing the motor1. Fit the motor flange (1) to the screw jack and bolt it into place.2. Fit the coupling halves (2) to the gearbox shaft and bolt them into place.3. Attach the coupling star (3).4. Pull the motor-side coupling halves (4) on to the motor shaft.5. Attach the motor (5) to the motor flange and bolt it into place.6. Fit the motor-side coupling halves (6) as follows:–Slide them on to the gearbox-side coupling halves, leaving1 mm axial play.–Tighten the securing bolt (7).–If the coupling halves cannot be slid on to the motor shaft:Adjust the position before step 5 and tighten them.ZIMM Screw Jack 6 Installation6.4 Connecting the electrical components6.4.1 Motor✓ The motor (if supplied) must be installed.1. Open the motor terminal box. The connection assignment is shownwithin the motor terminal box.2. Connect the motor in accordance with the circuit diagram.6.4.2Limit switchFig. 12: Fitting the plug connector on the limit switch1. Remove the protection element (1) from the limit switch.2. Remove the protection element (2) from the plug connector.3. Insert the plug connector (3) into the limit switch.4. Turn the screw (4) 90° clockwise.Connecting the limitswitch6 Installation ZIMM Screw Jack5. Connect the cable ends (5) in accordance with diagram (see Fig. 13).Fig. 13: Connection diagram for the limit switchBN BrownBK BlackBU Blue BK-WH Black-White GN-YE Green-YellowIf necessary the cable outlet can be turned through 180°.Fig. 14: Turning the cable outlet of the limit switch1. Loosen the screws (1) and unscrew them.2. Pull the limit switch (3) out of its bracket (2) and turn it through 180°.3. Insert the limit switch into the bracket (2) again.4. Refit the screws (1) and tighten them.Fig. 15: Adjustment of the limit switch1. Move the screw jack away from the limit switch trigger point.2. Loosen the screws (1).3. Adjust the limit switch by sliding it in the direction shown.4. Tighten the screws (1).Turning the cable outlet Adjusting the position ofthe limit switch±5mmZIMM Screw Jack 6 Installation6.5 Trial running✓The system must be installed and aligned.✓The spindle must be greased (for more information see section"7.2 Lubrication", page 25).→Run the screw jack over the complete travel in both directions.When doing this, comply with the following:–Run the screw jack slowly and carefully.–As far as possible, run it with no load or with only a small load.–Current consumption should be within the normal range, andshould be constant.Major fluctuations indicate alignment errors and stresses.–Monitor the temperature and avoid overheating, especiallywhere the travel is long and multiple runs are performedsuccessively.–Avoid overrunning the limit switch (optional).6 Installation ZIMM Screw Jack6.6 Correcting the alignmentIf necessary, the alignment can be corrected without much trouble.The spindle must be greased (for more information see section"7.2 Lubrication", page 25).S version1Fig. 16:Correctly aligned screw jack - S version1. Slacken the securing bolts on the gearbox casing and at the end ofthe spindle.2. Fully retract the jack (1).3. Tighten the securing bolts.4. Repeat the trial run (see section 6.5, page 21).R version213Fig. 17:Correctly aligned screw jack - R version1. Move the nut to the middle (1).2. Slacken the securing bolts on the gearbox casing and on the endbearing plate GLP.3. Extend the nut to just before the end bearing plate (2).ZIMM Screw Jack 6 Installation4. Tighten the securing bolts on the end bearing plate.5. Retract the nut to just before the gearbox (3).6. Tighten the securing bolts on the gearbox casing.7. Repeat the trial run (see section "6.5 Trial running", page 21).6.7 Commissioning✓The ZIMM Screw Jack together with its attachments must beinstalled and connected.✓The spindle must be greased (for more information see section"7.2 Lubrication", page 25).✓The trial run must have been completed successfully.1. Check all screw fastenings once again.2. Perform a trial run with operating load.When doing this, comply with the following:–Torque must be constant.–Current consumption must be constant.–Operating temperature must be within the normal range.–The limit switch (if fitted) or the end bearings must not beoverrun.3. Regrease the spindle after the first 2 operating hours at mediumload.6.8 Running-in phaseThe running-in phase of the gearbox and spindle lasts as a rule between20 and 50 operating hours. A higher torque and higher operatingtemperature must be expected during this period.The torque may be up to 50% higher during the running-in phase than insubsequent operation.7 Operation and maintenance ZIMM Screw Jack7 Operation and maintenance7.1 InspectionFor problem-free operation, the ZIMM Screw Jack must be inspectedregularly:•The first inspection should be no later than after 1 month•Further inspections should be performed at least annually1. Record the inspections, for a template see "Appendix: Inspectioncertificate", page 35.2. If necessary, perform Troubleshooting, see section 7.3, page 31.→If problems cannot be localised and rectified:Contact ZIMM Maschinenelemente GmbH + Co KG.7.1.1 Visual check✓Switch off the machine and secure it against switching on again.1. Check the greasing of the spindle, if necessary regrease and revisethe maintenance interval.2. Check the screws for the attachments and couplings/connectingshafts and if necessary retighten them.3. If a safety nut SIFA is fitted: Check wear in accordance with theFig. 18 (right hand picture) .–Make a note of dimension "A" and compare it with the set value.–Maximum permissible wear: 25% of the screw pitch.–If electronic monitoring is fitted, this check is not required.ZIMM Screw Jack7 Operation and maintenanceFig. 18:Safety trap nut SIFA: Dimension "A" for comparison whenchecking wear4. Visually check the coupling stars.5. Allow the machine to run, checking for the following:–Running without jerking and vibration–No excessive noise–Constant current consumption–Temperature rise within the -permissible range7.2 LubricationGood lubrication and use of the correct lubricants are critical for thecorrect operation and working life of the screw jack.Each screw jack application has different requirements, therefore thevalues specified in the following section are only recommendations.7.2.1 Lubricating screw jacksThe Z and GSZ series ZIMM Screw Jack are sealed and are filled withhigh-quality synthetic low-viscosity grease; from size 250 kN they arefilled with synthetic oil.Under normal operating conditions the gearbox is lubricated for life.7.2.2 Lubricating bevel gear drivesBevel gear drives are filled with synthetic oil and under normal operatingconditions lubricated for life.7 Operation and maintenance ZIMM Screw Jack7.2.3Greasing the spindle of a trapezoidal screw jack TR) The spindle of a trapezoidal screw jack must be greased regularly asrequired.Standard grease up to size 150 kN: Part no.: Castrol Tribol GR 4020/460-2 PD, 400 ml cartridgeStandard grease from size 250 kN:Part no.: Castrol Tribol GR 3020/1000-2 PD, 400 ml cartridgeQuantities for greasing new trapezoidal screw spindles TR:Intervals GreasesZIMM Screw Jack 7 Operation and maintenance✓ When changing the grease: The spindle must be clean.1. Remove the protective cap from the grease nipple.2. Press the nozzle of the grease gun against the grease nipple:– S version: Grease nipple on the gearbox casing– R version: Grease nipple on the travelling nut (optional)3. Filling with grease:– Providing personal safety is assured: Perform greasing whenextending, in order to ensure the best distribution of thegrease.– To do this, slowly extend the screw jack and apply strokes of thegrease gun. When doing so, make sure the correct quantity ofgrease is applied.Preconditions When extending7 Operation and maintenance ZIMM Screw JackWhen stationary–It is best to apply grease in several jack positions, to ensuregood distribution of grease.–S version: Apply only small quantities of grease at each jackposition, so that grease is not forced through the seals into thegearbox.–R version: If no grease nipple is fitted, apply the grease directlyto the spindle.ZIMM Screw Jack 7 Operation and maintenance7.2.4Greasing the ball screw drive KGT spindleStandard grease for ball screw drive KGT Part no.: Castrol Tribol GR 4747/220-2 HT, 400 ml cartridgeQuantity (indicative value):•1 ml per 1 cm spindle diameter.✓When changing the grease: The spindle must be clean.Intervals GreasePreconditions7 Operation and maintenance ZIMM Screw Jack1. Remove the protective cap from the grease nipple.2. Press the nozzle of the grease gun against the grease nipple:– S version: Grease nipple on the gearbox cover.– R version: Grease nipple on the travelling nut.3. Filling with grease:– Providing personal safety is assured: Perform greasing whenextending, in order to ensure the best distribution of the grease.– To do this, slowly extend the screw jack and apply strokes of thegrease gun. When doing so, make sure the correct quantity ofgrease is applied.– It is best to apply grease in several jack positions, to ensuregood distribution of grease.– S version: Apply only small quantities of grease at each jackposition, so that the grease is not forced through the seals intothe gearbox.When extending When stationaryZIMM Screw Jack7 Operation and maintenance7.3 TroubleshootingIf faults are evident, these should be localised according to specificcriteria, and rectified by application of appropriate actions. The followingtable offers start points as assistance for troubleshooting.7 Operation and maintenance ZIMM Screw JackZIMM Screw Jack 8 Decommissioning and recommissioning8Decommissioning and recommissioningAfter the ZIMM Screw Jack has been out of use for a long period: 1. Clean the spindle and2. Regrease the spindle, see section "7.2 Lubrication", page 25.9 Repair and replacement→ Contact ZIMM Maschinenelemente GmbH + Co KG.10 DisposalThe ZIMM Screw Jack satisfies the current standards and regulations for disposal of end of life equipment. It contains no poisonous substances which demand the taking of special precautions. → During disposal, ensure:– Compliance with regional laws and regulations for wastedisposal – Correct disposal and recycling should be entrusted to aprofessional disposal company The following materials will require disposal: • Lubricants (grease or oil in the gearbox, lubricating grease on the spindle)• Steel parts (coated with environmentally-friendly paints or coatings) • Anodised aluminium (parts)• Bronze/copper (bevel gear, nuts or windings on the motor) •Plastic parts (seals etc.)DecommissioningRecommissioning11 Declaration of incorporation ZIMM Screw Jack11 Declaration of incorporationZIMM Screw Jack12 Appendix: Inspection certificate12 Appendix: Inspection certificateTemplate for copying for inspections to section "7.1 Inspection",page 24.ZIMM Screw Jack (Serial number): ____________________________ZIMM Maschinenelemente GmbH + Co KG Millennium Park 36890 Lustenau / AustriaPhone: 0043 (0) 5577 806-0Fax: 0043 (0) 5577 806-8************www.zimm.eu。

螺旋千斤顶作业姓名 朱小龙 学号 10901131 一、题目：螺旋千斤顶 原始数据:二、机构简图三、工作量1、总装配图一张；2、计算说明书一份。

四、参考资料螺旋千斤顶设计指导书1目录一、螺杆的设计与计算 (3)1．螺纹的牙型 (3)2．螺杆的材料 (3)3．螺杆直径 (4)4．自锁验算 (4)5．螺杆结构 (4)6．螺杆的强度校核 (5)二、螺母的设计与计算 (5)1．材料 (5)2．螺纹圈数Z与高度H (5)3．螺母其它尺寸 (6)4．螺母与底座的配合 (7)三、螺杆稳定性验算 (7)四、托杯的设计与计算 (7)五、手柄设计与计算 (9)1．材料 (9)2．手柄长度L (9)p3．手柄直径d (9)p4．手柄结构 (9)六、底座设计 (10)七、千斤顶的效率 (11)螺旋千斤顶主要零件：螺杆、螺母、托杯、手柄和底座。

设计的原始数据：最大起重F=50KN、最大升起高度H=200mm。

螺旋千斤顶的设计步骤如下：1、螺杆的设计与计算：（1）螺纹的牙型选用矩形螺纹，采用内径对中，配合选H8/h8，螺纹的径向间隙很小，在计算强度时不考虑。

（2）螺杆的材料选用45号钢,查【1】表3-2。

原始数据F=50KN H=200mm配合选H8/h8螺杆材料选45号钢螺纹牙危险截面的抗剪强度条件为：[]τπτ≤=ZFb d 1; 螺纹牙危险截面的抗弯强度条件为：[]b 21b Z b d Fl6σπσ≤=;均符合条件。

Z 取8考虑到退刀槽的影响，实际螺纹圈数为Z ’＝Z ＋1.5=9.5螺母高H ’＝Z ’P=76mm（3）螺母其它尺寸 螺母其它尺寸见图。

其中d D )8.1~6.1(==62.4~70.2mm,取D=65mm ；D D )4.1~3.1(1==84.5~91mm ，取1D =86mm ；3'H a ==25.33,取a=26mm.螺母高76mm其它尺寸如图口和沟纹。

为了防止托杯从螺杆端部脱落，在螺杆上端应装置挡板。

螺旋千斤顶设计1.题目介绍：（1） 基本要求：● 设计一个螺旋千斤顶（如右图） （2） 工作参数： ● 最大起重量Fmax=26KN ● 最大起升距Hmax=220mm （3） 设计要求：● 根据最大起升重量选择材料 ● 确定螺纹尺寸 ● 满足耐磨性 ● 强度条件 ● 稳定性条件 ● 自锁条件 （4） 计算要求：● 螺旋传动的材料选择，工作能力计算和自锁性计算，其它结构的工作能力计算；(螺母许用挤压应力[σp] ≈1.5[σb])● 地面承压能力计算，确定下支承面尺寸；(木材许用挤压应力[σp]=3MPa) ● 人手的操作能力计算，确定手柄的直径和长度(人手最大操作力≈200N)。

（5） 绘制装配图和螺母零件图（确定全部结构形式和尺寸）。

2.千斤顶设计2.1螺旋传动设计2.1.1选择螺纹类型千斤顶是传力机构，常用于传力或传递运动的螺纹为矩形螺纹、梯形螺纹和锯齿形螺纹。

矩形螺纹效率高，但牙型精确制造困难，螺旋副磨损后间隙难以补偿，且内外螺纹旋合定心较难，故常为梯形螺纹所代替；锯齿形螺纹牙的工作边接近矩形直边，多用于承受单向轴向力；梯形螺纹的牙型角α=30°，牙根强度高，螺纹的工艺好，对中性好，不易松动。

综上，本设计选择用梯形单头螺纹。

由于千斤顶对精度的要求不高，而且属于中等旋合长度，因此，公差带选7e 。

A2.1.2选择螺旋副材料《机械设计教程》表2-38千斤顶最大起升重量为26KN ，最大起升距离为220mm ，由千斤顶工作条件可得：其工作转速低，而受力较大。

因此：螺杆材料选择45号钢，螺母材料选择ZCuAl10Fe3。

2.1.3 耐磨性设计根据耐磨性条件确定螺杆中径d2。

求出d2后，按标准选取相应公称直径d 、螺距P 及其它尺寸。

耐磨性设计公式如下：[]p h FPπφ≥2d由于螺母为整体结构，故φ=1.2~2.5，这里取φ=1.7 梯形螺纹h/P=0.5螺杆材料为钢，螺母材料为青铜，滑动速度为低速时，许用压强为[p]=(18~25)MPa 。

千斤顶设计说明书螺旋千斤顶设计说明书（一）设计目的：1. 初步学习综合应用所学知识，培养独立解决实际问题的能力；2. 了解和掌握零件设计、部件设计和简单装置设计的过程和方法；3. 明确起重螺旋的设计方法和步骤，为课程设计打下基础。

（二）设计进行步骤及注意事项： 已知条件：最大载荷 N F 9800= 最大升距 mm L 200=起重螺旋为传力螺旋,主要特点是能承受较大的轴向力,并要求自锁,螺杆材料应具有较高的强度,较高的耐磨性,螺母材料出要求有较高的强度外,还应有较好的减磨性.因此螺旋副材料选取钢-青铜,螺杆选用45号钢。

选用梯形螺纹，右旋单线。

根据螺旋副耐磨条件计算螺杆的直径：2[]FPd h p πφ≥p h 55.0=，代入上式,得： 20.8[]F d p φ≥取5.2=φ，对钢-青铜螺旋副MPa P 20][=，1.0~08.0=f 代入数据得：mm d 78.102≥，根据梯形螺纹国家标准，选取螺纹为Tr22⨯5,其基本参数为：mm d 22=，mm D d 5.1922==，mm d 5.163=，mm D 171=，mm D 5.224=，mm p 5=。

计算螺母的螺纹圈数，并求出高度mm d H 75.485.195.22=⨯==φN F 9800=mm L 200=mm d 22=mm d 5.192=mm D 5.192=mm d 5.163=mm D 171=mm D 5.224=mm p 5=1075.9575.48≤===p H n ，取10=n mm p n H 50510=⨯=⨯=1) 螺杆螺纹部分的强度计算：此部分力矩由螺纹力矩1T 和螺杆端面力矩2T 组成。

︒=30α,︒==6.4tanar 2d pπγ, ︒===ψ9.5)]2/cos(/arctan[arctan αf f v v , m N d F T v ⋅=⨯+ψ⨯=882.172/)tan(21γ由于螺杆与托杯之间装有推力球轴承，所以2T <<1T所以螺杆工作部分上端面为危险截面，根据第四强度理论得螺杆危险截面的当量应力 MPa d T d F v 8.452.0342231223=⎪⎭⎫⎝⎛+⎪⎭⎫ ⎝⎛=πσ 螺杆材料为45号钢，其许用应力为：360[]120~723~53~5sMPa σσ===，[]ca v σσσ=≤，满足要求。

螺旋千斤顶设计计算说明书一、 设计条件：1、最大起重量 Fmax=30 kN2、最大起升距离 hmax=180 mm二、 螺纹的设计与计算1. 选择螺纹类型梯形螺纹的内外螺纹以锥面贴紧不易松动，工艺性好，牙根强度高，对中性好，所以选择梯形螺纹，其牙形为等腰梯形，牙型角α=30° 2. 选取螺杆和螺母材料螺杆材料选择常用的45号钢，查询可知σs =355 MPa ，σb = 600 MPa ；螺母选择青铜（ZCuAl10Fe3），查询可知σs =180 MPa ，σb = 490 MPa ；查询可知滑动螺旋副钢-青铜的许用压力[p]=15 MPa 。

3. 确定螺杆直径由耐磨性条件，螺杆中径d 2≥0.8√Fφ[p]由于螺母为整体结构，且磨损后不能调整，选取φ =2.0，又F=Fmax=30 kN 代入数据可得d 2≥0.8√300002.0×15=25.3 mm按GB/T 5796.2-2005选取公称直径d=28mm 的螺纹，螺距P=5mm ，线数n=1，螺旋副的摩擦系数f=0.09，螺旋角β=15°，查询可知其中径d 2=25.5mm ，满足要求。

4. 自锁性校核螺旋升角γ=arctan nP πd 2=3.57°；当量摩擦角ρv =arctan fcosβ=5.32°故ρv >γ，满足自锁性条件。

5. 螺杆强度校核螺杆所受扭矩T =Fd 22tan (γ+ρv )=59.8 N ∙m螺杆危险截面上既受拉压应力又受扭转切应力，应用第四强度理论，有：σca=√σ+3τ=√(4Fπd12)2+3(T0.2d13)<[σ]查询可知，螺纹小径d1=22.5 mm,代入数据可得σca=75.5 MPa;查询可知，取安全系数S=4，许用应力[σ]=σs4=3554=89 MPa;故σca<[σ],满足强度要求。

6.稳定性计算螺杆柔度λ=4μld1,其中长度系数μ=2，根据经验公式有效长度取l=hmax+1.5d+H2=247 mm，则λ=4×2×24722.5=87.8>80查表可知螺杆临界载荷F cr=π2EI a(μl)2 ,其中惯性半径I a=πd1264,查询可知45号钢E=210GPa，代入数据可得F cr=243.4 kN由稳定性校核公式：S C=F crF≥[S]取[S]=2.5-4,则S C=243.430=8.11>[S],满足稳定性要求。

题目：螺旋千斤顶学院：专业：班级：设计者：学号：指导老师：完成日期：目录一、目的 (3)二、题目及方案 (3)三、受力简图 (3)四、设计进行步骤 (4)五、参考文献 (7)六、计算机截图 (7)七、计算机辅助程序 (8)八、结构图 (9)一．目的1．熟悉螺旋千斤顶的工作原理与设计方法；2．初步学会综合、运用所学过的知识，解决实际问题，培养独立工作能力；3．熟悉有关设计资料，学会查手册。

二．题目螺旋千斤顶原始数据如下：(按学号尾数)最大起重高度H’=210 mm手柄施加力Fp=200N四．设计进行步骤及注意事项：五、参考文献[1] 濮良贵纪名刚：机械设计高等教育出版社。

[2] 吴宗泽罗圣国：机械设计课程设计手册高等教育出版社[3] 龚溎义等机械设计课程设计图册高等教育出版社六、计算机截图七、计算机辅助程序#include<stdio.h>#include<math.h>#define PI acos(-1)void main(){doublea[17][5]={{15.5,20,20.5,18,4},{16.5,22,22.5,19.5,5},{18.5,24,24.5,21.5,5}, {20.5,26,26.5,23.5,5},{22.5,28,28.5,25.5,5},{23,30,31,27,6},{25,32,33,29,6 },{27,34,35,31,6},{29,36,37,33,6},{30,38,39,34.5,7},{34,42,43,38.5,7},{36, 44,45,40.5,7},{37,46,47,42,8},{39,48,49,44,8},{41,50,51,46,8},{43,52,53,48 ,}};double d1,d,d3,d2,p,f,h1,fp,t,g,h,u,k,lp,n,m,dp,x,w,l,z;double fc;int i=0;scanf("%lf%lf%lf",&f,&h1,&fp);d1=1.25*sqrt(f/101.4);loop:if(d1>a[i][0]){i++;goto loop;}d1=a[i][0];d=a[i][1];d3=a[i][2];d2=a[i][3];p=a[i][4];t=atan(p/(PI*d2));g=atan(0.0924);while(t>g){i++;goto loop;}h=2*f/(PI*d2*20);u=h/p;k=h/d2;n=d3-2;m=d3-p+2;lp=(0.5*f*d2*tan(t+g)+0.043*f*(pow(n,3)-pow(m,3))/(pow(n,2)-pow(m,2)))/200 ;x=fp*lp/15;dp=exp(log(x)/3);w=PI*pow(d1,4)/64;l=(1.5*dp+h1+0.5*h)*2;fc=9.87*206000*w/pow(l,2);z=fc/f;if(z<3.5){i++;goto loop;}printf("d1=%lf,d=%lf,d3=%lf,d2=%lf,p=%lf,t=%lf,g=%lf,h=%lf,u=%lf,z=%lf,k=% lf,dp=%lf\n",d1,d,d3,d2,p,t,g,h,u,z,k,dp);}八、结构图旋转螺杆起重式千斤顶结构图用推力滚动轴承结构。