CN201368014Y - Oil-free lubrication self-sealing box-split sealing structure of high-pressure plunger pump - Google Patents

Oil-free lubrication self-sealing box-split sealing structure of high-pressure plunger pump Download PDF

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Publication number
CN201368014Y
CN201368014Y CNU2009200688213U CN200920068821U CN201368014Y CN 201368014 Y CN201368014 Y CN 201368014Y CN U2009200688213 U CNU2009200688213 U CN U2009200688213U CN 200920068821 U CN200920068821 U CN 200920068821U CN 201368014 Y CN201368014 Y CN 201368014Y
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CN
China
Prior art keywords
sealing
seal
pressure
plunger pump
oil
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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
CNU2009200688213U
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Chinese (zh)
Inventor
李国平
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.)
Shanghai Dalong Machinery Factory Company Limited
Original Assignee
SHANGHAI ELECTRICAL COMPRESSOR PUMPS CO Ltd
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Priority to CNU2009200688213U priority Critical patent/CN201368014Y/en
Application granted granted Critical
Publication of CN201368014Y publication Critical patent/CN201368014Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a sealing structure of a reciprocating-type plunger pump, in particular to an oil-free lubrication self-sealing box-split sealing structure of a high-pressure plunger pump, which is suitable for high-pressure transportation of boric acid solution or desalted water in a nuclear power plant. The sealing structure is realized as follows: the oil-free lubrication self-sealing box-split sealing structure of the high-pressure plunger pump consists of a plunger, a low-pressure sealing box, a sealing box body, a back guide sleeve, a washing water jacket, high-pressure sealing boxes, a flange, a front guide sleeve and nuts, wherein the flange is used for fixedly connecting the sealing box body with a pump body. The utility model is characterized in that the low-pressure sealing box, the back guide sleeve, the washing water jacket, the two high-pressure sealing boxes and the front guide sleeve are respectively and sequentially mounted on an outer circle of the plunger in the sealing box body and fixed axially by the nuts. The sealing structure is applicable to the reciprocating-type plunger pump and provides the plunger sealing for the reciprocating movement of a reciprocating-type charging pump and a hydraulic-test pump of the nuclear station. The sealing structure can meet the using requirement on the reciprocating-type plunger pump by the operation condition of a nuclear power plant.

Description

Self-styled minute cartridge seal structure of the oil-free lubrication of high-pressure plunger pump
Technical field
The utility model relates to a kind of sealing configuration of reciprocating plunger pump, especially relates to a kind of nuclear power station mesohigh that is applicable to and carries boric acid aqueous solution or demineralized water, self-styled minute cartridge seal structure of the oil-free lubrication of high-pressure plunger pump.
Background technique
Plunger pump is reciprocating in cylinder body by plunger, causes the variation of sealed volume to realize inhaling working medium and the displacement pump of pressing working medium.Because plunger pump has the pressure height, compact structure, the efficient height, Flow-rate adjustment is characteristics easily, so in needs high pressure, big flow, powerful system, or the occasion that need regulate at flow is widely-used.
The sealing configuration of reciprocating plunger pump is divided into following several pattern usually:
1) packing seal structure of plunger pump for the sealing configuration that guarantees plunger pump can bear high-pressure medium, can guarantee normal operation again, need suitably tighten filler with adjusting nut.Too tight for making filler be unlikely to seize, cause heating, allow medium (or lubricant oil) that certain leakage rate is arranged, the flow ten thousand of suitable pump/.Because the plunger pump long-play because of the running-in and the wearing and tearing of filler, leakage rate can occur and strengthen.Need in running, in time adjusting nut be adjusted, be in normal state with the sealing that keeps plunger pump.
2) the self sealing sealing configuration of plunger pump, this is the usual manner of the sealing configuration of plunger pump.After installation mixed up, the self-tightening of seal ring can keep the plunger seal proper functioning, convenient management during operation, and the adjusting maintenance load is less relatively.But behind the long-play, the various forms of damages of seal ring can appear in the self sealing sealing configuration of plunger pump, sealing function are weakened or failure phenomenon.For example, wearing and tearing appear in the procheilon of primary seal circle; Ftractureing of primary seal circle along the section center line; The afterbody base angle is extruded in the gap with afterbody and is worn and torn gradually; And afterbody is by seal failure forms such as wearing and tearing.Therefore, if adopt the self sealing sealing configuration of plunger pump, must be at above-mentioned deficiency, overall improvement ring structure, the life-span of improving the self sealing plunger seal.
Concrete technological scheme
With reciprocating plunger pump be applied to nuclear power station back and forth on fill pump and hydraulic testpump, need satisfy the radiation proof requirement of boric acid aqueous solution and demineralized water as working medium, promptly must meet every performance requirement of nuclear power station.But in view of the above-mentioned shortcoming of reciprocating plunger pump, order of the present utility model is to solve down routine technical problem:
1) working medium can not be contaminated.Because no matter the working medium of reciprocating plunger pump is at nuclear power one circuit cools waterpipe, still a water shutoff is provided or annotates case water-filling and moisturizing medium to the safety injection system peace to the nuclear power main pump, all must keep clean.The nuclear power operating mode does not allow for sealing life of improving plunger and the oiling agent of annotating, and must adopt the mode of oil-free lubrication.
2) working medium of pump has radioactive material.Therefore, the seal request height of plunger, its leakage rate will be lacked.The leakage rate of conventional plunger pump be ten thousand of main pump flow/, and the leakage rate that is used for the plunger pump of nuclear power is less than 1/5 of conventional plunger pump.
3) adopt self sealing plunger seal structure,, be fit to the requirement of nuclear power generating equipment in the labour management with the maintenance service time decreased of working site.Must guarantee simultaneously the long-life index of plunger seal, safety, reliable during operation.
The utility model is to realize like this, self-styled minute cartridge seal structure of a kind of oil-free lubrication of high-pressure plunger pump, be made up of plunger 1, low pressure seal box 2, sealed letter body 3, back guide sleeve 4, flushing water jacket 5, high pressure sealing box 6, flange 7, preceding guide sleeve 8 and nut 9, described flange 7 is fixedlyed connected sealed letter body 3 with the pump housing; It is characterized in that: within the described sealed letter body 3, be respectively charged into a low pressure seal box 2, a back guide sleeve 4, a flushing water jacket 5, two high pressure sealing boxes 6 and a preceding guide sleeve 8 on plunger 1 cylindrical, be arranged in order, and adopt nut 9 axial restraints.
Described high pressure sealing box is made up of high pressure sealing seat 61, sealing gasket 62, O-ring seals 63, sealing gasket 64, primary seal circle 65 and seal ring 66, the cylindrical of described high pressure sealing seat 61 is provided with groove 611, and sealing gasket 62 and O-ring seals 63 are housed in the described groove successively; Endoporus one end of described high pressure sealing seat 61 is provided with groove 612, and sealing gasket 64, primary seal circle 65 and seal ring 66 are housed in the described inner hole groove 612 successively.
Described seal ring 66 is packed in the paddy portion of primary seal circle 65.
Described low pressure seal box 2 is made up of low pressure seal seat 21, O-ring seals 22, sealing gasket 23 and Yx RunddichtringO 24, and the cylindrical of described low pressure seal seat 21 is provided with groove, and O-ring seals 22 is housed in the described groove; Endoporus one end of described low pressure seal seat 21 is provided with groove, and described inner hole groove is equipped with sealing gasket 23 and Yx RunddichtringO 24 successively.
One end of the outer wall of described low pressure seal seat 21 is provided with boss.
Position above the flushing water jacket 5 of described sealed letter body 3 is provided with sparge water import screw 31 and sparge water outlet screw 32, and the diameter of sparge water import screw 31 is less than the diameter of sparge water outlet screw 32.
The beneficial effects of the utility model are:
1) the utility model has also promptly adopted the structural type of high pressure sealing box and low pressure seal box owing to adopted the form of oil-free lubrication self sealing, makes and brings up to 3000h in working life of plunger seal.
2) self sealing plunger seal structure of the present utility model, fill on pump and the hydraulic testpump owing to use on nuclear power station reciprocating type, the leakage rate of the sealed letter of plunger pump is reduced, leakage rate only be conventional pumps flow 1.5/100000ths~2 between, be conventional reciprocating pump leakage rate 1/5~1/7.
3) in plunger seal structure of the present utility model, owing to adopted the sparge water nested structure, plunger, high-pressure sealing ring and low pressure seal spare are carried out the small flow flushing, the existing effect that Sealing is played the water lubrication cooling and dispels the heat can reduce and avoid the crystallization of boric acid aqueous solution in Sealing again.
4) the utility model has been owing to adopted oil-free lubrication self sealing sealing configuration, during installation and operation, do not need to leak according to plunger seal when the pump operation and various situations such as heating are regulated as packing seal.
5) oil-free lubrication self sealing sealing configuration of the present utility model just can move continuously in the normal back of operation, is fit to nuclear power generating equipment fully in the requirement of using with management.In when maintenance, have into characteristics such as pump house engineering time is few, reliable.
Description of drawings
Fig. 1: self-styled minute cartridge seal structure of the oil-free lubrication of high-pressure plunger pump of the present utility model.
Fig. 2: low pressure seal box 2 structural representations of the present utility model.
Fig. 3: high pressure sealing box 6 structural representations of the present utility model.
Fig. 4: low pressure seal seat 21 structural representations.
Fig. 5: high pressure sealing seat 61 structural representations.
Embodiment
Self-styled minute cartridge seal structure of the oil-free lubrication of high-pressure plunger pump of the present utility model, its specific embodiments is consulted shown in Figure 1.On the plunger 1 of plunger pump, the order that ecto-entad is arranged is: guide sleeve 8 before a low pressure seal box 2, a back guide sleeve 4, a flushing water jacket 5, two the high pressure sealing boxes 6,, and in the sealed letter body 3 of packing into, be tightened with adjusting nut 9.Sealed letter body 3 is positioned in the positioning hole D at pump fuselage applying panel place, is center line and the power end crosshead center line coaxality that has guaranteed sealed letter, sealed letter body 3 is compressed with the pump housing and fixedlys connected by flange 7.
In the cavity of sealed letter, its preceding guide sleeve 8 and the cylindrical of back guide sleeve 4 and the coaxality of endoporus must be controlled within the φ 0.03mm.Pack into behind the plunger, keep the gap between 0.10~0.15mm.Its material adopts the epoxy impregnation graphite self-lubricating material, can guarantee the concentricity of plunger operation; Again can be wear-resisting.
Described high pressure sealing box 6 is made of high pressure sealing seat 61, sealing gasket 62, O-ring seals 63, sealing gasket 64, primary seal circle 65 and seal ring 66.O-ring seals 63 is packed in the groove 611 of high pressure sealing seat 61 cylindricals, and sealing gasket 62 is installed in O-ring seals 63 outsides, is used to protect O-ring seals 63.With pack into the according to the order of sequence inner hole groove 612 of high pressure sealing seat 61 of sealing gasket 64, primary seal circle 65 and seal ring 66.In the paddy portion of primary seal circle 65, there is bigger circular arc to be connected with lip, purpose is to improve tearing toughness, simultaneously seal ring 66 is contained in the primary seal circle 65 paddy portions, lip was sealed plunger when primary seal circle 65 bore high pressure, when plunger backhaul low pressure, the lip of primary seal circle 65 has relaxation state, but be subjected to paddy portion seal ring 66 to influence amount of deformation little, little owing to amount of deformation when moving, while primary seal circle 65, seal ring 66 all adopts special filled rubber, has improved anti-tear intensity and the hardness and wear resistance of drawing of rubber.Therefore primary seal circle 65 had both prevented to have improved whole service life again along section centerline cracking.
Sealing gasket 64 adopts " half elasticity " cushion pad, is placed on the behind of primary seal circle 65, and its endoporus and plunger gap are between 0.025-0.12.Sealing gasket 64 adopts carbon fiber of anti-flame the and teflon self lubricating material, and self-lubricating property is good.Sealing gasket 64 adopts little gap structure design, has avoided the afterbody base angle of primary seal circle 65 to extrude in the gap, scaling loss and afterbody wearing and tearing.High pressure sealing seat 61 cylindricals have been installed the O-ring seals 63 that has sealing gasket 62 and have been avoided working medium to leak from cylindrical.
Position above the flushing water jacket 5 of described sealed letter body 3 is provided with the outlet of sparge water import and sparge water, and the sparge water import is less than the sparge water outlet.Sparge water can play the cooling operation to plunger 1, low pressure seal spare 2 and high-pressure sealing ring, can provide the water lubrication antifriction function to Sealing again, because sparge water is the oiling agent of the Sealing of filled rubber.
Described low pressure seal box 2 is made up of low pressure seal seat 21, O-ring seals 22, sealing gasket 23 and Yx RunddichtringO 24.The cylindrical of described low pressure seal seat 21 is provided with groove, in the described groove 211 O-ring seals 22 is housed; Endoporus one end of described low pressure seal seat 21 is provided with groove 212, and described inner hole groove is equipped with sealing gasket 23 and Yx RunddichtringO 24 successively.Yx RunddichtringO 24 adopts special filled rubber, and sealing gasket 23 and plunger gap can play preventing that Yx seal ring 24 roots from damaging, and also can reduce leakage rate at 0.025-0.12 simultaneously.According to claimant's use checking, adopt one group of low pressure seal box 2 can make the plunger seal leakage rate 100,000 about two.Described O-ring seals 22 is installed in the outer round recessed 211 of low pressure seal seat 21, can avoid working medium to release from cylindrical.

Claims (9)

1. self-styled minute cartridge seal structure of the oil-free lubrication of a high-pressure plunger pump, be made up of plunger (1), low pressure seal box (2), sealed letter body (3), back guide sleeve (4), flushing water jacket (5), high pressure sealing box (6), flange (7), preceding guide sleeve (8) and nut (9), described flange (7) is fixedlyed connected sealed letter body (3) with the pump housing; It is characterized in that: within the described sealed letter body (3), plunger (1) cylindrical is respectively charged into a low pressure seal box (2), a back guide sleeve (4), a flushing water jacket (5), two high pressure sealing boxes (6) and a preceding guide sleeve (8), be arranged in order, and adopt nut (9) axial restraint.
2. self-styled minute cartridge seal structure of the oil-free lubrication of a kind of high-pressure plunger pump according to claim 1, it is characterized in that: described high pressure sealing box is made up of high pressure sealing seat (61), sealing gasket (62), O-ring seals (63), sealing gasket (64), primary seal circle (65) and seal ring (66), the cylindrical of described high pressure sealing seat (61) is provided with groove (611), and sealing gasket (62) and O-ring seals (63) are housed in the described groove successively; Endoporus one end of described high pressure sealing seat (61) is provided with groove (612), and sealing gasket (64), primary seal circle (65) and seal ring (66) are housed in the described inner hole groove (612) successively.
3. self-styled minute cartridge seal structure of the oil-free lubrication of a kind of high-pressure plunger pump according to claim 2, it is characterized in that: the paddy portion of described primary seal circle (65) is provided with the recess that seal ring (66) is packed into.
4. self-styled minute cartridge seal structure of the oil-free lubrication of a kind of high-pressure plunger pump according to claim 1, it is characterized in that: described low pressure seal box (2) is made up of low pressure seal seat (21), O-ring seals (22), sealing gasket (23) and Yx RunddichtringO (24), the cylindrical of described low pressure seal seat (21) is provided with groove, and O-ring seals (22) is housed in the described groove; Endoporus one end of described low pressure seal seat (21) is provided with groove, and described inner hole groove is equipped with sealing gasket (23) and Yx RunddichtringO (24) successively.
5. self-styled minute cartridge seal structure of the oil-free lubrication of a kind of high-pressure plunger pump according to claim 4, it is characterized in that: an end of the outer wall of described low pressure seal seat (21) is provided with boss.
6. self-styled minute cartridge seal structure of the oil-free lubrication of a kind of high-pressure plunger pump according to claim 3, it is characterized in that: described primary seal circle (65), seal ring (66) material adopt the filled rubber of anti-irradiation.
7. self-styled minute cartridge seal structure of the oil-free lubrication of a kind of high-pressure plunger pump according to claim 4, it is characterized in that: the material of described Yx seal ring (24) adopts the filled rubber of anti-irradiation.
8. self-styled minute cartridge seal structure of the oil-free lubrication of a kind of high-pressure plunger pump according to claim 1, it is characterized in that: the position above the flushing water jacket (5) of described sealed letter body (3), be provided with sparge water import screw (31) and sparge water outlet screw (32), the diameter of sparge water import screw (31) is less than the diameter of sparge water outlet screw (32).
9. self-styled minute cartridge seal structure of the oil-free lubrication of a kind of high-pressure plunger pump according to claim 1 is characterized in that: guide sleeve (8), the special-purpose epoxy impregnation graphite material of back guide sleeve (4) employing before described.
CNU2009200688213U 2009-03-13 2009-03-13 Oil-free lubrication self-sealing box-split sealing structure of high-pressure plunger pump Expired - Lifetime CN201368014Y (en)

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CNU2009200688213U CN201368014Y (en) 2009-03-13 2009-03-13 Oil-free lubrication self-sealing box-split sealing structure of high-pressure plunger pump

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101881260B (en) * 2009-05-06 2012-11-07 阮孟照 Oil-free lubrication plunger pump
WO2015106661A1 (en) * 2014-01-17 2015-07-23 沈如华 High-efficiency color-paste color-mixing pump
CN105546115A (en) * 2016-01-20 2016-05-04 沧州渤海防爆特种工具集团有限公司 Self-adjusting type sealing box

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101881260B (en) * 2009-05-06 2012-11-07 阮孟照 Oil-free lubrication plunger pump
WO2015106661A1 (en) * 2014-01-17 2015-07-23 沈如华 High-efficiency color-paste color-mixing pump
CN105546115A (en) * 2016-01-20 2016-05-04 沧州渤海防爆特种工具集团有限公司 Self-adjusting type sealing box

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Legal Events

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C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: SHANGHAI DALONG MACHINE WORKS CO., LTD.

Free format text: FORMER NAME: SHANGHAI ELECTRIC COMPRESSOR PUMP CO., LTD.

CP01 Change in the name or title of a patent holder

Address after: 200431 Shanghai Yangtze River West Road, Baoshan District, No. 815

Patentee after: Shanghai Dalong Machinery Factory Company Limited

Address before: 200431 Shanghai Yangtze River West Road, Baoshan District, No. 815

Patentee before: Shanghai Electrical Compressor Pumps Co.,Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20091223