EP0053126A4 - Closed radial-cardan coupling used suitably in mohno type eccentric rolling screw pump. - Google Patents

Closed radial-cardan coupling used suitably in mohno type eccentric rolling screw pump.

Info

Publication number
EP0053126A4
EP0053126A4 EP19810901334 EP81901334A EP0053126A4 EP 0053126 A4 EP0053126 A4 EP 0053126A4 EP 19810901334 EP19810901334 EP 19810901334 EP 81901334 A EP81901334 A EP 81901334A EP 0053126 A4 EP0053126 A4 EP 0053126A4
Authority
EP
European Patent Office
Prior art keywords
torque
carrying
tapered
cardan
closed radial
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.)
Withdrawn
Application number
EP19810901334
Other languages
German (de)
French (fr)
Other versions
EP0053126A1 (en
Inventor
Antal Nador
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.)
FEMMECHANIKA SZIVATTYU ES ANYAGMOZGATOGEPGYARTO SZOVETKEZET
FEMMECHANIKA
Original Assignee
FEMMECHANIKA SZIVATTYU ES ANYAGMOZGATOGEPGYARTO SZOVETKEZET
FEMMECHANIKA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FEMMECHANIKA SZIVATTYU ES ANYAGMOZGATOGEPGYARTO SZOVETKEZET, FEMMECHANIKA filed Critical FEMMECHANIKA SZIVATTYU ES ANYAGMOZGATOGEPGYARTO SZOVETKEZET
Publication of EP0053126A1 publication Critical patent/EP0053126A1/en
Publication of EP0053126A4 publication Critical patent/EP0053126A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
    • F16D3/848—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to sliding between parts of the cover
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/42—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with ring-shaped intermediate member provided with bearings or inwardly-directed trunnions

Definitions

  • the screw piston of the Mohno type singlespandle excentric screw pump as the rotary part performs a complex motion outside the centreline of the pump, for this reason the torque is transmitted from the bearing supported driving shaft with cardan or other coupling realizing excentric motion.
  • the radial cardan coupling with its simple construction and minimal number of component parts is up to the technical and economic requirements. Its sealing system ensures long life.
  • the sealing solution is suitable for the protection against aggressive agents and solvents.
  • This closed radial-cardan excentric coupling is formed in such a way, that the torque transmitting elements are radially arranged, thus surrounding each other in annular form, and requiring close installation space.
  • These carrying bolts are tightly fitted in the tapered nest, whereby they ensure constant torque transmission to the carrying ring.
  • the threads ensure the tight fitting of the bolt as well as its tightening in the tapered nest, in order to transmit the torque to the accurately fitting tapered surfaces.
  • the carrying ring transmit the torque through the holes perpendicular to the carrying bolts to the driven excentric shaft stub 4 with bolt 6.
  • the excentric shaft in this case is closed into a spherical segmental element 7 tightly fitted 8 on shaft with the shaped external packing ring 9 fixed into the accurately fitting head piece 1.
  • the packing ring is protected by backing ring 10 against possible external high operating pressures. Constant pressure of the closing element 7 and packing ring 9 on the internal packing ring 8 is ensured by the spanner ring 13 acting through the backing ring 12.
  • the applied method of construction ensures total protection against mechanical damages, furthermore its sealing element may be produced from teflon, which protects the machine element against all kinds of aggressive substances and solvents.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The screw piston of the Mohno type singlespindle excentric screw pumps as the rotary part performs a complex motion outside the centreline of the pump, for this reason the torque is transmitted from the bearing supported driving shaft with cardan or other coupling realizing eccentric motion. This closed radial-cardan eccentric coupling is formed in such a way, that the torque transmitting elements are radially arranged, thus surrounding each other in annular form, and requiring close installation space. Two carrying bolts fitted opposite each other along the symmetry axis in a tapered, threaded hole on the cylindrical driven head piece. These carrying bolts are tightly fitted in the tapered nest, whereby they ensure constant torque transmission to the carrying ring. The threads ensure the tight fitting of the bolt as well as its tightening in the tapered nest, in order to transmit the torque to the accurately fitting tapered surfaces. The carrying ring transmits the torque through the holes perpendicular to the carrying bolts to the driven eccentric shaft stub with a bolt.

Description

CLOSED RADIAL-CARDAN COUPLING USED SUITABLY IN MOHNO TYPE EXCENTRIC ROLLING SCREW PUMP
The screw piston of the Mohno type singlespandle excentric screw pump as the rotary part performs a complex motion outside the centreline of the pump, for this reason the torque is transmitted from the bearing supported driving shaft with cardan or other coupling realizing excentric motion.
Since this pump system - owing to its special construction - is suitable for the delivery of media containing even solids, the sealing of the cardan couplings is essential in respect of the safe operation and life of the pump.
Characteristics of the technical and economic requirements related to the cardan couplings:
- Production at low cost,
- Long life, - Simple construction , the numb er of pa rts res tricted to the minimum,
- Transmission of h igh to rque with minimum space requirement . The best cardan solutions used in this field are those with arched tooth, which technically meet the requirements, but are expensive solutions, at the same time they are sensitive to the solid impurities, get easily damaged and as a result of damage the conditions of correct lubrication no longer exist causing fast wear of the coupling, furthermore their angular displacement is limited.
As further development of the Streicher type solution described in GFR patent specification No. 1 625 815 t he subject of the invention is solved as follows:
The radial cardan coupling with its simple construction and minimal number of component parts is up to the technical and economic requirements. Its sealing system ensures long life. The sealing solution is suitable for the protection against aggressive agents and solvents.
This closed radial-cardan excentric coupling is formed in such a way, that the torque transmitting elements are radially arranged, thus surrounding each other in annular form, and requiring close installation space.
Two carrying bolts 2 - the pinned ends of which are connected to carrying ring 3 - fitted opposite each other along the symmetry axis in a tapered, threaded hole on the cylindricaldriven head piece 1. These carrying bolts are tightly fitted in the tapered nest, whereby they ensure constant torque transmission to the carrying ring. The threads ensure the tight fitting of the bolt as well as its tightening in the tapered nest, in order to transmit the torque to the accurately fitting tapered surfaces.
The carrying ring transmit the torque through the holes perpendicular to the carrying bolts to the driven excentric shaft stub 4 with bolt 6.
Constant operation of these coupling elements is guaranteed by the tight sealing of the filled-in lubricant.
The excentric shaft in this case is closed into a spherical segmental element 7 tightly fitted 8 on shaft with the shaped external packing ring 9 fixed into the accurately fitting head piece 1. The packing ring is protected by backing ring 10 against possible external high operating pressures. Constant pressure of the closing element 7 and packing ring 9 on the internal packing ring 8 is ensured by the spanner ring 13 acting through the backing ring 12.
Drawback of the various alternatives closed with rubber bells against this solution is that partly the rubber material is not resistant to aggressive agents and solvents, furthermore its resistivity is limited against destruction caused by solids and against mechanical damages.
The applied method of construction ensures total protection against mechanical damages, furthermore its sealing element may be produced from teflon, which protects the machine element against all kinds of aggressive substances and solvents.

Claims

WHAT WE CLAIM IS
1. Closed radial-cardan coupling, c h a r a c t e r i z e d in that the head (1) and connected excentric shaft stub (4) are enclosed in a spherical segmental element (7) with the contacting external (9) and internal packing ring (8) and spanner ring (13).
2. Closed radial-cardan coupling as claimed in claim 1., c h a r a c t e r i z e d in that the carrying bolts (2) ensuring the connection of the head (1) and carrying ring (3) are fitted in a tapered nest and are pin-shaped.
3. Closed radial-cardan coupling as claimed in claim 1 or 2., c h a r a c t e r i z e d in that the head
(1) and shaft stub (4) are releasably coupled to each other and to the driving and driven shafts.
EP19810901334 1980-05-06 1981-05-06 Closed radial-cardan coupling used suitably in mohno type eccentric rolling screw pump. Withdrawn EP0053126A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU109780 1980-05-06
HU80801097A HU181117B (en) 1980-05-06 1980-05-06 Radial-cardan shaft coupling of closed construction expedientyl for eccentric rolling screw pump of mohno system

Publications (2)

Publication Number Publication Date
EP0053126A1 EP0053126A1 (en) 1982-06-09
EP0053126A4 true EP0053126A4 (en) 1982-09-03

Family

ID=10952821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810901334 Withdrawn EP0053126A4 (en) 1980-05-06 1981-05-06 Closed radial-cardan coupling used suitably in mohno type eccentric rolling screw pump.

Country Status (3)

Country Link
EP (1) EP0053126A4 (en)
HU (1) HU181117B (en)
WO (1) WO1981003210A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312310A1 (en) * 1983-04-06 1984-10-11 Armatec FTS-Armaturen GmbH & Co KG, 7988 Wangen Eccentric spiral pump
FR2683279B1 (en) * 1991-10-30 1994-02-18 Michel Orain LUBRICANT PROTECTION AND RETENTION DEVICE FOR ARTICULATED TRANSMISSION JOINT, AND HOMOCINETIC JOINT THUS EQUIPPED.
FR2683280B1 (en) * 1991-10-30 1994-02-04 Michel Orain LUBRICANT PROTECTION AND RETENTION DEVICE FOR ARTICULATED TRANSMISSION JOINT, AND HOMOCINETIC JOINT THUS EQUIPPED.
FR2683282B1 (en) * 1991-10-30 1994-02-18 Glaenzer Spicer LUBRICANT PROTECTION AND RETENTION DEVICE FOR ARTICULATED TRANSMISSION, AND HOMOCINETIC SEAL THUS EQUIPPED.
FR2683281B1 (en) * 1991-10-30 1994-02-18 Glaenzer Spicer LUBRICANT PROTECTION AND RETENTION DEVICE FOR ARTICULATED TRANSMISSION JOINT, AND HOMOCINETIC JOINT THUS EQUIPPED.
US9115747B1 (en) * 2013-01-22 2015-08-25 Cvjags, Llc Articulating grease shield for use in a constant velocity joint

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE183428C (en) *
DE182417C (en) *

Also Published As

Publication number Publication date
HU181117B (en) 1983-06-28
EP0053126A1 (en) 1982-06-09
WO1981003210A1 (en) 1981-11-12

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19820323

AK Designated contracting states

Designated state(s): FR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19881201

RIN1 Information on inventor provided before grant (corrected)

Inventor name: NADOR, ANTAL