CN2263724Y

CN2263724Y - Gear pump

Info

Publication number: CN2263724Y
Application number: CN 96231126
Authority: CN
Inventors: 翟建宁; 周震
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-19
Filing date: 1996-01-19
Publication date: 1997-10-01
Anticipated expiration: 2006-01-19

Abstract

The utility model relates to an interstice compensation apparatus for an 8-typed full-symmetry floating shaft sleeve of a gear pump. An 8-typed seal groove is arranged on the plane of a floating shaft sleeve, and a seal ring which is provided with two sets of symmetrical balance claws is positioned in the 8-typed seal groove; thus, a gear face can be tightly pressed under the action of the hydraulic-pressure force; thereby, the axial interstice is reduced, and the leakage is reduced. The utility model solve the key problem in the prior art that the existing gear pump is unable to do bidirectional rotation. The utility model has the advantages that the service efficiency of the gear pump is raised, the service life of the gear pump is prolonged, and the operational reliability of the gear pump is raised. When the utility model is adopted, the structure of the high-pressure gear pump, which is applied to the present hydraulic system is greatly improved.

Description

Gear pump " 8 " type holohedral symmetry floating buss blank compensation apparatus

The utility model relates to mechanical field, is particularly suitable for the structure of the two-way gear oil pump complementary area of a kind of outer gearing formula for symmetry " 8 " type floating buss axial clearance compensation device.

At present, be used for the gear oil pump that has of hydraulic system transmission both at home and abroad, vane pump, reciprocating pump etc.Because gear oil pump is simple in structure, volume is little, in light weight, self-priming performance good, and is responsive down to pollutant, reliable operation, the life-span is long and be widely used on the various hydraulic mechanisms.But the defective that the present gear pump that uses also exists flow and pressure pulsation is big, noise is high, discharge capacity is immutable, sense of rotation is fixing.

The purpose of this utility model is: design a kind of " 8 " type holohedral symmetry floating buss axial clearance compensation device, make that gear pump can two-wayly rotate, discharge capacity is variable, flow and pressure pulsation are little, more stable work.

The technical solution of the utility model is: on the fastening floating buss plane of the pump housing of gear pump and forward and backward lid, have " 8 " type seal groove, in seal groove, place seal ring with two groups of symmetrical balance pawls, when the driving shaft gear sense of rotation changes, symmetrical balance pawl on " 8 " RunddichtringO is regulated floating buss both sides oil pocket pressure, satisfies the technical requirements of the two-way rotation of gear pump.

Fig. 1 is the utility model schematic representation of working on axle sleeve

Fig. 2 is " 8 " RunddichtringO structural drawing

Fig. 3 is the position profile figure of the utility model in gear oil pump

Among the figure: 1 pump housing, 2 housing seal circles, 3 axle sleeves, 4 " 8 " RunddichtringOs, 5 oil pockets, 1,6 oil pockets 2,7,8,9,10 are four balance pawls, 11 bonnets, 12 protecgulums, 13 driving gear shafts, 14 driven gear shafts, 15 draining holes, 16 oil sealings on " 8 " RunddichtringO.

Further introduce technology contents of the present utility model below in conjunction with accompanying drawing and embodiment:

" 8 " type integrated type holohedral symmetry rubber seal 4 of rectangular cross-section is inlaid in the groove that axle sleeve 3 planes adapt with it, four balance pawls 7 that the band garden cambered surface of two groups of symmetries of stretching out is arranged on the seal ring, 8,9,10, it is divided into four zones with complementary area is 7, III district between 8,8, II district between 9,9, IV district and 10 between 10, I district between 7, when the gear of driving shaft 13 turns clockwise, oil pocket 5 is an oil sucting cavity, oil pocket 6 is a pumping cavity, the III district is a low pressure area, the IV district is the zone of high pressure, I, II two districts are transition zone, owing to have certain radial clearance between axle sleeve 3 and the housing 1, pressure oil garden gap location outside axle sleeve 3 enters seal ring 4 back compressing balance pawls 9,10 is crooked to the inside, because balance pawl 7, the garden cambered surface is strutted under the oil pressure effect and is held out against on groove on 8, at balance pawl 7,8 make I under stopping, the pressure in II district and the pressure balance of IV district, axle sleeve 3 oil pocket 5 that under the effect of oil pocket 6 pressure oils, reclines, so just realized by seal ring 4 oil sucting cavity 5 and pumping cavity 6 is separately strict, guarantee that oil pocket 6 is the zone of high pressure, oil pocket 5 is a low pressure area.Otherwise, when driving shaft gear is rotated counterclockwise, oil pocket 5 is a pumping cavity, and oil pocket 6 is an oil sucting cavity, and at this moment the IV district is that low pressure area, III district are the zone of high pressure, it is crooked to the inside that pressure oil garden gap location outside axle sleeve 3 enters compressing balance pawl 7,8, after entering I, II district, pressure oil owing to be subjected to stopping of balance pawl 9,10 garden cambered surfaces, makes the pressure and the pressure balance of III district in I, II district, axle sleeve 3 oil pocket 6 that under the effect of oil pocket 5 pressure oils, reclines, guarantee that oil pocket 5 is the zone of high pressure, oil pocket 6 is a low pressure area.Realized the purpose of the bidirectional movement of gear pump.

The utility model has following advantage and effect:

1, adopt the utility model after, gear pump rotate recipient not to restriction, Can forward and reversely rotate.

2, hydraulic system adopts the two-way pump of this structure can simplify commutating structure, reduces cost, improves systematic entirety.

3, alternative various ratchet pumps in the market also can be transformed a large amount of now one-way pumps that use.

4, owing to gear, axle sleeve bidirectional stress, the life-span, the more stable work that have prolonged gear pump greatly are reliable.

Claims

1, a kind of gear pump " 8 " type holohedral symmetry floating buss blank compensation apparatus, it is characterized in that: on axle sleeve (3) plane that the pump housing (1) is connected with front and rear covers (11), (12), have " 8 " type seal groove, in groove, place a seal ring with two groups of symmetrical balance pawls (4).

2, according to a kind of gear pump " 8 " type holohedral symmetry floating buss blank compensation apparatus of claim 1, it is characterized in that: seal ring (4) is for the rectangular cross-section, Siping City's weighing apparatus pawl (7), (8), (9), (10) symmetric arrays and have arc-shaped curved surface.