US3693793A - Unit body vibrating screen - Google Patents

Unit body vibrating screen Download PDF

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Publication number
US3693793A
US3693793A US67831A US3693793DA US3693793A US 3693793 A US3693793 A US 3693793A US 67831 A US67831 A US 67831A US 3693793D A US3693793D A US 3693793DA US 3693793 A US3693793 A US 3693793A
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US
United States
Prior art keywords
screen
cross members
cross member
side walls
tubular cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US67831A
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English (en)
Inventor
Mathew P Hahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allis Chalmers Corp
Original Assignee
Allis Chalmers Corp
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Filing date
Publication date
Application filed by Allis Chalmers Corp filed Critical Allis Chalmers Corp
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Publication of US3693793A publication Critical patent/US3693793A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/284—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens with unbalanced weights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B07B1/44—Balancing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

Definitions

  • ..209/326, 209/3665 screen has an inclined body with an elevated feed end [51] Int. Cl. ..B07b 1/36 fined between a pair of side walls spaced apart by a [58] Field of Search ..209/366.5, 326, 332, 367 plurality f rigid tubular cross members.
  • One of the tubular cross members, centrally located, has a diame- 5 References Cited ter large enough for a drive shaft and associated bearings to be mounted therein.
  • Each of the tubular UNITED STATES PATENTS cross members projects on each end into an aperture 313 765 M1943 Parks 209/326 cut in the adjacent side wall where each is joined to l949703 3/l934 g 'g "209/326 the adjacent side wall by a weld around the entire cir- 2964186 12/1960 Ferrara B66 5 cumference thereof to provide an integral unitary as- 1920972 8/1933 D 'T' "209/3665 sembly of light weight, great strength, high natural 349l881 l 1970 i "209/366'5 frequency and with the weld path joining the cross G953 members to the side walls having a configuration ,Over f which is the same, i.e., circular, as the path of motion of the screen in vertical planes defined by the weld th 2,292,327 8/1942 Lincoln; pa 8 v 2.75 1,080 6/1956 G-leiser ..209/367 3 Claims, 5 Drawing Figures
  • the housing, the hearing assemblies orboth are bolted to screen body side walls and the shaft, the bearing assemblies and the housing are carried by. the screen body.
  • the side walls of such screen bodies are bolted or riveted to cross beams.
  • Screen constructed as shown in such prior art patents when installed or after a period of operation, may have a natural frequency which is too low, that is if the natural frequency of the screen is not well above the operating frequencyimposed thereon by the operation of the vibrator drive shaft, the screen will be subjected to violent vibration which can damage a screen or reduce its useful life.
  • Usual solutions to such problems known to. the prior art involve adding braces or heavier body components to stiffen the body. While such techniques are successful in raising the natural SUMMARY OF THE PRESENT INVENTION It is among the objects of the present invention to provide a new and improved lightweight screen of great strength and high natural frequency well above operating frequency of the screen.
  • screen body side walls are spaced apart by a plurality of rigid tubular cross members.
  • One of the tubular cross members centrally located with respect to both side walls, has a diameter larger than all others and large enough for a drive shaft and associated hearings to be mounted therein.
  • the drive shaft carries eccentric mass counterbalancing the screen body relative to an axis transverse to both side walls and about which axis the screen gyrates.
  • Each of the tubular cross members projects on each end into an aperture cut in the adjacent side wall where each cross member is joined to the adjacent side wall where each cross member is joined to the adjacent side wall by a weld around the entire circumference thereof to provide an integral unitary assembly of light weight, great strength, high natural frequency and with the weld path joining the cross members to the side walls having a configuration which is the same, i.e., circular, as the path of motion of the screen in vertical planes defined by the weld paths.
  • At least one of the tubular cross members between the shaft enclosing cross member and each end of the screen body project on both ends through and outwardly of both side walls to provide support arms for the screen which are a unitary part of a side wall spacing cross member.
  • FIG. 1 of the accompanying drawing shows a side elevation of a vibratory screen according to the present invention
  • FIG. 2 is an end view of the screen of FIG. 1;
  • FIGS. 3, 4 and 5 are fragmentary views showing details of the construction of the screen of FIG. I to enlarged scale.
  • One of the tubular cross members a is located centrally with respect to both side walls, 15, 16.
  • the tubular cross member 20a has a larger diameter than all other of the cross members 20 and cross member 20a has arranged within it a drive shaft 22 journaled in bearings 24.
  • the drive shaft-22 carries eccentric mass 25 counterbalancing the screen bodyrelative to an axis X-X' transverse to side walls l5, l6 and about which (axis X--X') the screen gyrates with substantially all points on the screen assembly moving to trace, in a vertical plane, a circular path of motion.
  • Balance wheels 26 may be mounted on shaft 22 outboard of walls 15, 16 and weights 27, 28 may be attached thereto to provide eccentric counterbalancing mass to supplement the mass 25 or as an alternate to mass 25.
  • the drive shaft 22 is driven by a motor 30 through belts 31 connected to drive a pulley 32 mounted on one end of the drive shaft 22.
  • the screen body 10 is shown as being provided with two decks or screen surfaces 33, 34. The screen surfaces 33, 34 are supported at the feed and discharge ends 12, 13 by beams 35 and at locations intermediate the feed and discharge ends by the tubular cross members 20.
  • FIGS. 3, 4 and 5 In the assembly of a screen as shown in FIGS. 1 and I 2, apertures in FIGS. 3, 4 and 5) for receiving end portions of the tubular cross members 20 are cut in both side walls 15, 16. The manner in which the tubular cross members 20 are connected to the side walls 15, 16 will be described with reference to FIGS. 3, 4 and 5.
  • an aperture 40a in side wall 16 is shown fitted with an annular collar 41 welded thereto for receiving an end portion of the large diameter tubular cross member 200.
  • the end portion of cross member 20a projects axially part way within collar 41.
  • Cross member 20a is connected to collar 41 by an annular weld 42a connecting the outer circumference of cross member 20a to an adjacent vertical surface 44 of collar 41 and by an annular weld 43a connecting the adjacent end of cross member 20a to an inner circumferential surface 45 of collar 41.
  • oneof the cross members 20b at each end of the screen body serves to connect the springs 11 to the screen body 10.
  • the manner in which the cross members 20b are connected to the screen body 10 and to the springs 11 is shown in FIG. 4.
  • an end portion of a cross member 20b projects through aperture 40b and beyond side wall 16 and a bracket 46 which is mounted on top of spring 11.
  • Cross member 20b is connected to side wall 16 by annular welds 42b and 43b. All other tubular cross members 20, that is all tubular cross members 20 except cross member 20a and a pair of cross members 20b, are connected to the side walls 15, 16 as shown in H6. 5.
  • a cross member 20 projects through aperture 40 and beyond an outer surface 48 of side wall 16 and an annular weld 42 connects the cross member 20 to the side wall 16.
  • a unitary screen body 10 is provided of which side walls 15, 16
  • the screen body 10 of apertured side walls 15, 16 and tubular cross members 20 is of light weight and great strength.
  • the rigidity of the screen body 10 provided by such construction provides a screen body with a high natural frequency, well above the operating frequency of the screen about the axis XX'.
  • the screen body 10 is assembled with welds 42, 43 that follow a circular path, as does every point on side walls 15, 16in the vertical planes defined by the welds, during operation of drive shaft 22.
  • a vibrating screen arranged to gyrate in a circular path about a horizontal axis of gyration and having a screen body with a feed end and a discharge end definedbetween a pair of horizontally spaced vertical side walls, and each side wall defining a centrally located aperture therethrough, said apertures being in horizontal and vertical register, a vibrator drive shaft arranged within the side wall apertures and having a journal on each end concentric thereto and carrying eccentric mass counterbalancing the screen body relative to said axis of gyration, and a-bearing assembly mounted around each journal and projecting to the adjacent aperture, the improvement comprising:
  • Bd ri of the cross members being of greater diameter than the other of said cross members and said larger diameter cross member being mounted about said vibrator drive shaft and bearing;
  • each end of each said cross member being joined to an adjacent side wall by a weld around the entire circumference thereof to provide an integral unitary assembly of great strength and high natural frequency and with the welds having a circular configuration corresponding to the circular path of motion of the screen in vertical planes defined by the welds around the tubular cross members.
  • a vibrating screen according to claim 1 in which at least one tubular cross member between the drive shaft and said feed end and at least one tubular cross member between the drive shaft and said discharge end project on both ends thereof through and outwardly of both side walls to provide support arms for the screen which are a unitary part of a side wall spacing cros member.
  • a vibrating screen according to claim 1 in which the side walls each define a plurality of apertures therein with one of said apertures being provided for the adjacent end of each tubular cross member, and each tubular cross member projects on both ends thereof through one of the apertures in register therewith.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Jigging Conveyors (AREA)
US67831A 1970-08-28 1970-08-28 Unit body vibrating screen Expired - Lifetime US3693793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6783170A 1970-08-28 1970-08-28

Publications (1)

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US3693793A true US3693793A (en) 1972-09-26

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US67831A Expired - Lifetime US3693793A (en) 1970-08-28 1970-08-28 Unit body vibrating screen

Country Status (9)

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US (1) US3693793A (enExample)
AU (1) AU431894B2 (enExample)
BE (1) BE771829A (enExample)
CA (1) CA945114A (enExample)
DE (1) DE2142790A1 (enExample)
FR (1) FR2106142A5 (enExample)
GB (1) GB1314488A (enExample)
SE (1) SE375921B (enExample)
ZA (1) ZA715511B (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519902A (en) * 1982-04-30 1985-05-28 Clinch River Corporation Vibrating screening apparatus
US20070158244A1 (en) * 2006-01-10 2007-07-12 James John Puda Method and apparatus for a vibrating screen aggregate separator
CN104624492A (zh) * 2015-02-28 2015-05-20 陕西三沅重工发展股份有限公司 一种复合振动筛以及复合振动提供方法
US10456809B1 (en) * 2017-03-28 2019-10-29 Conrad Leon Nagel Vibrating screen for an inlet hopper of a conveyor
CN112221954A (zh) * 2020-09-03 2021-01-15 陈建华 一种基于农业用花生生产的多级式除杂装置
CN112642707A (zh) * 2020-11-18 2021-04-13 浙江天丰陶瓷有限公司 一种龙泉青瓷加工用原料过筛装置
CN115400945A (zh) * 2022-08-03 2022-11-29 山东瑞兴阻燃科技有限公司 一种磷酸三苯酯制备用成品过滤装置
CN116116699A (zh) * 2022-12-12 2023-05-16 安徽捷迅光电技术有限公司 一种新式振动筛

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101632987B (zh) * 2009-08-14 2013-02-27 王智勇 多级滚筒式筛料机
CN110026999B (zh) * 2019-05-20 2022-04-12 安徽延达智能科技有限公司 一种巡检机器人的上下分层结构
CN112871287A (zh) * 2021-01-13 2021-06-01 陈航平 一种防止原料粘附的高效化工用的化工原料处理设备
CN113374854B (zh) * 2021-06-09 2022-09-13 福建群峰机械有限公司 一种振动箱的转轴安装结构
CN113275240B (zh) * 2021-07-12 2022-09-27 重庆台渝化工有限公司 一种塑胶助剂筛选混合一体机
CN116571438B (zh) * 2023-05-25 2023-12-12 江苏金红新材料股份有限公司 一种用于分离石榴石和钛矿混合物的分拣器及分离方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1920972A (en) * 1928-10-10 1933-08-08 Deister Machine Company Vibrating screen
US1949703A (en) * 1932-07-16 1934-03-06 William L Wettlaufer Body gyrating mechanism
US2246483A (en) * 1941-06-17 dillon
US2292327A (en) * 1941-04-17 1942-08-04 Allis Chalmers Mfg Co Gyrating mechanism
US2313765A (en) * 1937-09-07 1943-03-16 Walter J Parks Gyratory screen
US2660067A (en) * 1949-08-02 1953-11-24 Robert L Glover Vibration device
US2702634A (en) * 1953-04-24 1955-02-22 Allis Chalmers Mfg Co Cartridge type mechanism for vibrating screens and the like
US2751080A (en) * 1954-02-15 1956-06-19 Screen Equipment Company Inc Vibrating screen
US2884790A (en) * 1954-09-24 1959-05-05 Productive Equipment Company Vibrating screen
US2964186A (en) * 1958-03-03 1960-12-13 Achille K Ferrara Vibratory screen apparatus
US3491881A (en) * 1968-03-15 1970-01-27 Nordberg Manufacturing Co Vibrating screen

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2246483A (en) * 1941-06-17 dillon
US1920972A (en) * 1928-10-10 1933-08-08 Deister Machine Company Vibrating screen
US1949703A (en) * 1932-07-16 1934-03-06 William L Wettlaufer Body gyrating mechanism
US2313765A (en) * 1937-09-07 1943-03-16 Walter J Parks Gyratory screen
US2292327A (en) * 1941-04-17 1942-08-04 Allis Chalmers Mfg Co Gyrating mechanism
US2660067A (en) * 1949-08-02 1953-11-24 Robert L Glover Vibration device
US2702634A (en) * 1953-04-24 1955-02-22 Allis Chalmers Mfg Co Cartridge type mechanism for vibrating screens and the like
US2751080A (en) * 1954-02-15 1956-06-19 Screen Equipment Company Inc Vibrating screen
US2884790A (en) * 1954-09-24 1959-05-05 Productive Equipment Company Vibrating screen
US2964186A (en) * 1958-03-03 1960-12-13 Achille K Ferrara Vibratory screen apparatus
US3491881A (en) * 1968-03-15 1970-01-27 Nordberg Manufacturing Co Vibrating screen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519902A (en) * 1982-04-30 1985-05-28 Clinch River Corporation Vibrating screening apparatus
US20070158244A1 (en) * 2006-01-10 2007-07-12 James John Puda Method and apparatus for a vibrating screen aggregate separator
US7591377B2 (en) * 2006-01-10 2009-09-22 James John Puda Method and apparatus for a vibrating screen aggregate separator
CN104624492A (zh) * 2015-02-28 2015-05-20 陕西三沅重工发展股份有限公司 一种复合振动筛以及复合振动提供方法
US10456809B1 (en) * 2017-03-28 2019-10-29 Conrad Leon Nagel Vibrating screen for an inlet hopper of a conveyor
CN112221954A (zh) * 2020-09-03 2021-01-15 陈建华 一种基于农业用花生生产的多级式除杂装置
CN112642707A (zh) * 2020-11-18 2021-04-13 浙江天丰陶瓷有限公司 一种龙泉青瓷加工用原料过筛装置
CN115400945A (zh) * 2022-08-03 2022-11-29 山东瑞兴阻燃科技有限公司 一种磷酸三苯酯制备用成品过滤装置
CN115400945B (zh) * 2022-08-03 2023-05-26 山东瑞兴阻燃科技有限公司 一种磷酸三苯酯制备用成品过滤装置
CN116116699A (zh) * 2022-12-12 2023-05-16 安徽捷迅光电技术有限公司 一种新式振动筛

Also Published As

Publication number Publication date
FR2106142A5 (enExample) 1972-04-28
AU3257471A (en) 1973-02-08
SE375921B (enExample) 1975-05-05
GB1314488A (en) 1973-04-26
BE771829A (fr) 1972-02-28
AU431894B2 (en) 1973-02-08
DE2142790A1 (de) 1972-03-02
CA945114A (en) 1974-04-09
ZA715511B (en) 1973-03-28

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AS Assignment

Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

Owner name: WOODS KATHLEEN D., AS TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329