CN104564824B

CN104564824B - Pump and using method thereof

Info

Publication number: CN104564824B
Application number: CN201410655280.XA
Authority: CN
Inventors: 细见弘树; 永冈圭介; 中野太辅
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2009-02-18
Filing date: 2010-02-09
Publication date: 2017-04-12
Anticipated expiration: 2030-02-09
Also published as: CN104564824A; CN104500450A; CN101806311B; CN104500450B; CN101806311A

Abstract

The invention provides a pump and using method thereof, in which the part between a joint surface (33) of a first housing (29) and a joint surface (31) of a second housing (28) is sealed by a rope-shaped sealing part (34) made of an electrometric material. The sealing part (34) is embedded into a sealing groove (35) formed on the joint surface (33) of the first housing (29), and is compressed by the joint surface (31) of the second housing (28) at the predetermined compression rate in the depth direction of the sealing groove (35), and a high compression part (36) with the compression rate for the sealing part (34) higher than the predetermined compression rate is formed at the predetermined part in the length direction of the sealing groove (35).

Description

The using method of pump and pump

The application be the Application No. 201010115997.7, applying date on 2 9th, 2010, by applying for artificial strain formula meeting Society's Kubo field the proposes, divisional application of entitled " using method of pump and pump " application.

Technical field

The present invention relates to the pump and its pump of the shell formed with the first housing and the second housing is engaged via composition surface Using method.

Background technology

As known pump, as shown in Figure 31, Figure 32, the shell 121 for having pump 120 is divided into 122 He of upper body up and down The type of 123 the two parts of lower case.The upper flange portion 124 of upper body 122 is located at using many fastenings of bolt 126 With the lower flange portion 125 for being located at lower case 123.On the composition surface 127 and lower flange portion 125 in upper flange portion 124 Clamping between composition surface 128 arranges the liner 129 of lamellar.Upper bond face 127 and lower engagement face 128 are sealed by liner 129 Between.

In addition, for as mentioned above between the composition surface 127 of upper body 122 and the composition surface 128 of lower case 123 The composition sealed using the liner 129 of lamellar, such as in Japanese Laid-Open Patent Publication：2007-146789 (JPs 2007- 146789), Japanese Utility Model publication：Have described in flat 4-17840 (real justice 4-17840).

But, in above-mentioned existing form, need to cut off liner 129 so that its shape kiss with composition surface 127,128 Close.For this purpose, for each of the model or size of pump 120 needs to make 129 (sealing of variform various gasket Part), the making that there is liner 129 spends time.In addition, in order to fully ensure that the face needed for liner 129 is installed in fastening Pressure, needs also exist for the problem of the size of the quantity or increase bolt 126 of increase bolt 126 (connecting member).

In addition, as known pump, as shown in figure 33, having the axle through hole that 135 insertions of main shaft are arranged on shell 121 136 type.Shaft sealing 137 between sealing main shaft 135 and shell 121 is set in axle through hole 136.In the outer of shell 121 Portion arranges and the water in discharge side volute chamber 138 is supplied to shaft sealing 137 to seal the outside pipe arrangement 139 of shaft sealing 137. One end of outside pipe arrangement 139 is connected with discharge side volute chamber 138, and the other end and the shaft sealing 137 of outside pipe arrangement 139 connect It is logical.

So, a part for the water by discharging to outside in discharge side volute chamber 138, is matched somebody with somebody by outside as sealing water Pipe 139 is supplied to shaft sealing 137.Thus, voluntarily water shutoff is carried out in shaft sealing 137.For this purpose, the air of outside can be prevented Water from the intrusion of shaft sealing 137 shell 121 or in shell 121 is from shaft sealing 137 to 121 External leakage of shell.

In addition, for the pump 120 for arranging outside pipe arrangement 139 as mentioned above in the outside of shell 121, it is practical new in Japanese Laid-Open Type publication：Have described in clear 61-116197 (opening clear 61-116197 in fact).

But, in above-mentioned prior art form, because outside pipe arrangement 139 is arranged on shell 121, there is pump 120 Maximization, the problem for arranging the spatial volume increase needed for pump 120.

In addition, also there are constructional difficulties bad generation leak or makes outside pipe arrangement by vibration during pump action by constructing 139 problems vibrated and damage.

The content of the invention

It is therefore an object of the present invention to provide easy to manufacture seal member, the quantity or size of connecting member can be reduced, gone back Pump miniaturization can be made, the user of the pump and pump damaged by the leakage of bad generation of constructing and by the pipe arrangement that vibration is produced can be prevented Method.

The pump of first aspect present invention, engages the first housing and the second housing via composition surface and constitutes shell,

Suction side room is formed in shell and side room is discharged, it is characterised in that

Between the composition surface of the composition surface of the first housing and the second housing using the rope form being made up of elastomeric material sealing Part is sealed,

Seal groove is formed on the composition surface of at least any one housing of first and second housing,

Seal member is embedded into seal groove, and is pressed by the composition surface of another housing, seal groove depth direction with The compression ratio of regulation is compressed,

The compression ratio of the seal member high compression portion higher than the compression ratio of above-mentioned regulation is formed in the length direction of seal groove Established part.

According to such composition, seal member is embedded into seal groove, be bonded with each other composition surface, and is connected using connecting member The first housing and the second housing are tied, shell is assembled.Thus, seal member is pressed to the depth direction of seal groove with the compression ratio for specifying Contracting, is sealed by seal member between the composition surface of the first housing and the composition surface of the second housing.

Seal member only changes the length of seal member and cuts because being the part of the rope form being made up of elastomeric material Face area is suitable for each of the model or size of pump.Therefore, use the situation of the liner of lamellar with prior art like that Compare, can significantly save the time cut off with the shape on composition surface in consistent manner.Thus, can be greatly decreased by pump model or Time during each manufacture seal member of size.

In addition, the seal groove beyond high compression portion, in shell a small amount of liquid in the inner side of seal member along its length Flowing.The major part that the flowing of the liquid in length direction is carried on the inside of seal member is intercepted in high compression portion.Cause This, can for example prevent in shell discharge side room liquid along its length seal member inner side flow and to suction side room Leakage.

In addition, because reducing in the face pressure needed for sealing, the link for linking the first housing and the second housing can be reduced The size of the quantity or connecting member of part.

The pump of second aspect present invention, it is characterised in that shell is divided into the first housing and second by the plane comprising main shaft Housing,

The axle through hole of main shaft institute insertion is set on shell,

End face opening of the axle through hole in the spindle axis direction of shell,

End face opening of the end of the length direction of seal groove in shell,

High compression portion is formed in the end section of seal groove.

According to such composition, can prevent the liquid in shell from flowing and from sealing in the inner side of seal member along its length The end section of groove is leaked to the outside of the end face of shell.In addition, because the end of seal groove is can use in the end face opening of shell Visually confirm filling situation of the seal member to seal groove.

The pump of third aspect present invention, it is characterised in that in the composition surface of a housing, in the end section of seal groove The sealant coated portion for being coated with liquid sealant is set and the inner peripheral surface of axle through hole between.

According to such composition, by liquid sealing between the inner peripheral surface of the end section and axle through hole of seal groove Agent is sealed.For this purpose, can prevent between end section and the inner peripheral surface of axle through hole of the liquid in shell by seal groove to shell End face outside leakage.

The pump of fourth aspect present invention, it is characterised in that the area of section of the seal groove in high compression portion compares high compression portion The area of section of seal groove in addition is little.

The pump of fifth aspect present invention, it is characterised in that beyond the depth ratio high compression portion of the seal groove in high compression portion Seal groove depth as shallow.

According to such composition, seal member more reliably can be sealed in high compression portion.With the pressure of whole region Shrinkage becomes compared with the situation of the equal compression ratio of high compression portion, it is possible to decrease link the linking part of the first housing and the second housing The size of the quantity or connecting member of part.

The pump of sixth aspect present invention, it is characterised in that the bottom surface of the seal groove in high compression portion forms inclined plane,

Part of the inclined plane by the depth of seal groove from beyond high compression portion is inclined in the way of gradually becoming shallower as.

According to such composition, because part of the compression ratio of seal member from beyond high compression portion is gradually become by inclined plane Height, so can prevent above-mentioned compression ratio from suddenly swashing rises (change).Thus, good sealing can be carried out by seal member.

The pump of seventh aspect present invention, it is characterised in that the angle that the inclined plane in the two sides and bottom of seal groove is intersected Portion forms the bending section of smooth curved.

According to such composition, because the corner of seal groove is formed as bending section, easily by the sealing of compression Part is seamlessly filled.Thus, it is possible to the gap between eliminating the corner of the seal member and seal groove of compression, is growing Degree direction carries over the major part of the flowing of the liquid of seal member and is intercepted in high compression portion.

The pump of eighth aspect present invention, it is characterised in that high compression portion has the pack completeness of seal member opposing seal groove For 100% part.

According to such composition, seal groove high compression portion above-mentioned pack completeness be 100% part by the sealing compressed Part is seamlessly filled.Therefore, carry in length direction the inner side of seal member liquid flowing in high compression portion quilt Intercept.

The pump of ninth aspect present invention, it is characterised in that the axle through hole of main shaft institute insertion is provided with shell,

Shell is divided into the first housing and the second housing by the plane comprising main shaft,

In axle through hole, be provided with sealing main shaft and shell between shaft sealing, shell wall be internally formed it is close to axle Liquid the sealing liquid path by liquid seal shaft sealing in envelope portion supply discharge side room.

According to such composition, by main axis, pump action, be inhaled into the liquid in suction side room from discharge side room to The outside discharge of shell.Now, a part for the liquid in discharge side room is supplied to shaft sealing by sealing liquid path.For this purpose, axle Sealing is by liquid seal.Thus, it is possible to prevent the air of outside from entering in shell from shaft sealing.Or, can suppress in shell Liquid from shaft sealing to the amount of shell External leakage.

In addition, because sealing liquid path is internally formed in the wall of shell, not needing the outside pipe arrangement of sealing fluid, can making Pump miniaturization.Further, it is also possible to prevent by the damage or leakage of outside pipe arrangement caused by vibration.

The pump of tenth aspect present invention, it is characterised in that sealing liquid path is at least with the shape on the composition surface of the first housing Into channel-shaped the first supply passageway, the first supply passageway is located at shell in the state of the first housing and the second housing is engaged The inside of wall.

According to such composition, by the processing groove on the composition surface of housing, sealing liquid can be internally formed in the wall of shell Path.For this purpose, the processing for forming sealing liquid path becomes easy.

The pump of the tenth one side of the invention, it is characterised in that the upstream side of the first supply passageway is connected with side room is discharged, together When downstream side connect with shaft sealing.

According to such composition, a part for the liquid in discharge side room is supplied by the first supply passageway of sealing liquid path To shaft sealing.Thus, shaft sealing is by liquid seal.

The pump of the twelfth aspect of the present invention, it is characterised in that sealing liquid path is with the second supply formed in second shell body Path,

The upstream side of the second supply passageway is connected with side room is discharged, while side is connected with the first supply passageway downstream,

The upstream side of the first supply passageway is connected with the second supply passageway, while side is connected with shaft sealing downstream.

According to such composition, the part of the liquid in discharge side room is from the second supply passageway in the first supply passageway Flowing, is supplied to shaft sealing.

Pump in terms of the present invention the 13rd, it is characterised in that formed in the first housing from the first supply passageway branch Escape route,

The downstream of escape route is connected with the room of suction side.

According to such composition, when a part for the liquid in discharge side room flows in the first supply passageway, on its way In separately stream to the first supply passageway and escape route.Wherein, the liquid in the flowing of the first supply passageway is supplied to shaft sealing. In addition, the liquid in escape flow channels is supplied in the room of suction side.Thus, the flow of the liquid for flowing in sealing liquid path increases Plus, flow velocity also increases therewith.Axle envelope liquid can be made fully to reduce pressure for this purpose, the mechanism of decompressor is arranged on sealing liquid path.Therefore, even if Pressure ratio in the discharge side room be suitable to liquid seal authorized pressure it is high when, it is also possible to by decompression is arranged on sealing liquid path Mechanism, makes from discharge side room the reduced pressure of the axle envelope liquid for being supplied to shaft sealing to the pressure for specifying.

The pump of fourteenth aspect of the present invention, it is characterised in that form escape route on the first housing,

The downstream of the second supply passageway is branched off into the first supply passageway and escape route, downstream and the suction of escape route Enter in side room and connect.

According to such composition, a part for the liquid in discharge side room is by the second supply passageway, logical from the second supply Road separately flows to the first supply passageway and escape route.Wherein, the liquid for flowing in the first supply passageway is supplied to sealing Portion.In addition, the liquid flowed in escape route is supplied in the room of suction side.Accordingly, because flowing in the second supply passageway Liquid flow increase, flow velocity also increases therewith, thus on sealing liquid path arrange the mechanism of decompressor axle envelope liquid can be made abundant Decompression.Therefore, though the pressure ratio in discharge side room be suitable to liquid seal authorized pressure it is high when, it is also possible to by sealing liquid The mechanism of decompressor is arranged on path to be made by the reduced pressure of the axle envelope liquid that shaft sealing is supplied in discharge side room to the pressure for specifying.

The pump of the fifteenth aspect of the present invention, it is characterised in that be provided with sealing liquid path make it is close to axle from discharge side room The mechanism of decompressor of the pressure drop of the axle envelope liquid of envelope portion flowing to authorized pressure.

According to such composition, the pressure ratio in discharge side room is suitable to the authorized pressure using liquid seal shaft sealing Gao Shi, the pressure that the axle envelope liquid of shaft sealing is supplied to from discharge side room are reduced to the pressure of regulation by arranging the mechanism of decompressor Power.Thus, it is possible to liquid seal be carried out to shaft sealing with the axle envelope liquid of optimum pressure.

In addition, because the mechanism of decompressor is located on sealing liquid path, not being exposed to the outside of shell.Thus, it is possible to enter pump One step miniaturization.

Pump in terms of the present invention the 16th, it is characterised in that the mechanism of decompressor is built-in the throttle orifice part of sealing liquid path.

According to such composition, the work manhours of sealing liquid path will not be significantly increased, decompression can be set on sealing liquid path Mechanism.

Pump in terms of the present invention the 17th, arranges trapping foreign matter part on sealing liquid path.

According to decorating films such as such composition, the rubbish being mixed in the sealing water flowed on sealing liquid path (axle envelope water) Can be captured by trapping foreign matter part.Thus, it is possible to prevent the decorating films such as rubbish blocking sealing liquid path.

Pump in terms of the present invention the 18th, one end shell end face opening and back washing that the other end is connected with shaft sealing use Stream is formed on shell.

According to such composition, in back washing sealing liquid path, back washing water is supplied to one end of back washing stream.Thus, Back washing water flows in back washing stream, and by shaft sealing, the adverse current in sealing liquid path is discharged to side room is discharged.Thus, it is inverse Wash the decorating films such as sealing liquid path, the rubbish in exclusion sealing liquid path.

In terms of the present invention the 19th, it is characterised in that be the using method of described pump in terms of the above-mentioned 9th, do not using During sealing liquid path, shut-off block is set on sealing liquid path, sealing liquid path is closed.

Thus, by the change of operating condition, when a part for the liquid in discharge side room is used not as axle envelope liquid, can To be changed without pump, by the sealing liquid path of shut-off block closed interior, pump is made to operate using from outside sealing liquid.

Pump in terms of the present invention the 20th, arranges suction side room in shell and discharges side room,

The axle through hole of main shaft institute insertion is set on shell,

Shell with by the first housing that is divided into of plane comprising main shaft and the second housing,

First housing and the second housing are engaged by composition surface,

The shaft sealing being provided with axle through hole between sealing main shaft and shell, it is characterised in that

In the inside of the wall of shell, formation is supplied to shaft sealing the liquid in discharge side room, with liquid seal sealing The sealing liquid path in portion.

According to such composition, by main axis, pump action, be inhaled into the liquid in suction side room from discharge side room to The outside discharge of shell.Now, because a part for the liquid in discharge side room is supplied to shaft sealing by sealing liquid path, Shaft sealing is by liquid seal.Thus, it is possible to prevent extraneous air from entering in shell from shaft sealing, or the liquid in shell can be suppressed Body is from shaft sealing to the amount of shell External leakage.

In addition, because sealing liquid path is formed at the inside of the wall of shell, not needing the outside pipe arrangement of sealing fluid, can make Pump miniaturization.Further, prevented also from the damage or leakage of the outside pipe arrangement formed by vibration.

Description of the drawings

Fig. 1 be the present invention first embodiment in pump side view.

Fig. 2 is the upward view of the upper body of the pump in first embodiment.

Fig. 3 is the top view of the lower case of the pump in first embodiment.

Fig. 4 is the axonometric chart of the seal member of the pump in first embodiment.

Fig. 5 is the close-up plan view of the seal groove of the pump in first embodiment.

Fig. 6 A are the amplification views of the end section of the seal groove of the pump in first embodiment.

Fig. 6 B are the X-X direction views for representing Fig. 6 A.

Fig. 7 A are the Y1-Y1 direction views of Fig. 6 A.

Fig. 7 B are to represent the sectional view of the seal member of compression in the seal groove in Fig. 7 A.

Fig. 7 C are the Y2-Y2 direction views of Fig. 6 A.

Fig. 7 D are to represent the sectional view of the seal member of compression in the seal groove in Fig. 7 C.

Fig. 7 E are the Y3-Y3 direction views of Fig. 6 A.

Fig. 7 F are to represent the sectional view of the seal member of compression in the seal groove in Fig. 7 E.

Fig. 8 be the present invention first embodiment in pump shaft sealing amplification view.

Fig. 9 be the present invention first embodiment in pump water shutoff path axonometric chart.

Figure 10 be the present invention first embodiment in pump water shutoff path longitudinal section.

Figure 11 is the top view of the lower case of the pump in second embodiment of the present invention.

Figure 12 A are the axonometric charts of the seal member of the pump in third embodiment of the present invention.

Figure 12 B are the sectional elevations of the seal member of the pump in third embodiment of the present invention.

Figure 13 A be the present invention the 4th embodiment in pump water shutoff path axonometric chart.

Figure 13 B are provided in the axonometric chart of the throttle orifice part in the water shutoff path of Figure 13 A.

Figure 14 be the present invention the 5th embodiment in pump Partial enlarged side view.

Figure 15 be the present invention the 5th embodiment in pump lower case top view.

Figure 16 be the present invention the 5th embodiment in pump lower case close-up top view.

Figure 17 A be the present invention the 5th embodiment in pump water shutoff path and the axonometric chart of escape route.

Figure 17 B and Figure 17 C are provided in the axonometric chart of each throttle orifice part of the water shutoff path and escape route of Figure 17 A.

Figure 18 A be the present invention the 6th embodiment in pump water shutoff path and the axonometric chart of escape route.

Figure 18 B are provided in the axonometric chart of the throttle orifice part in the water shutoff path of Figure 18 A.

Figure 18 C are provided in the longitudinal section of the throttle orifice part in the water shutoff path of Figure 18 A.

Figure 19 be the present invention the 7th embodiment in pump water shutoff path longitudinal section.

Figure 20 A are that the vertical profile of the first supply passageway in the water shutoff path of the pump in the 8th embodiment of the present invention is regarded Figure.

Figure 20 B are the X-X direction views of Figure 20 A.

Figure 21 be the present invention the 9th embodiment in pump lower case top view.

Figure 22 be the present invention the 9th embodiment in pump lower case close-up top view.

Figure 23 be the present invention the 9th embodiment in pump water shutoff path axonometric chart.

Figure 24 be the present invention the 9th embodiment in pump water shutoff path partial enlargement longitudinal section.

Figure 25 be the present invention the tenth embodiment in pump lower case top view.

Figure 26 be the present invention the tenth embodiment in pump lower case close-up top view.

Figure 27 be the present invention the tenth embodiment in pump water shutoff path axonometric chart.

Figure 28 be the present invention the 11st embodiment in pump water shutoff path longitudinal section.

Figure 29 be the present invention the 12nd embodiment in pump shaft sealing amplification view.

Figure 30 be the present invention the 13rd embodiment in pump water shutoff path axonometric chart.

Figure 31 is the side view of the pump of prior art.

Figure 32 is the top view of the lower case of the pump of prior art.

Figure 33 is the sectional view of the water shutoff construction of the pump for representing prior art.

Specific embodiment

In order to further illustrate the present invention, the present invention will be described with reference to the accompanying drawings.

(first embodiment)

Hereinafter, the first embodiment in the present invention is illustrated while reference picture.

As shown in Figure 1 to Figure 3,11 is that double suction enters volute pump.Suction inlet 13 and outlet 14 are formed in shell 12.In shell 12 It is interior, form the discharge side room 15 (volute room) and the left and right sides positioned at discharge side room 15 and suction inlet connected with outlet 14 The suction side room 16 of 13 connections.

In shell 12, the pair of right and left axle through hole 18 of 17 insertions of main shaft is set.The axle through hole 18 of both sides is respectively in shell 12 The end face 20 in 19 direction of spindle axis be open.In addition, impeller 25 is arranged on main shaft 17, impeller 25 is accommodated in discharge side room 15 It is interior.In addition, main shaft 17 is rotated by the driving means such as motor (omitting diagram).

Shell 12 is divided into up and down by the horizontal plane (of the plane comprising main shaft) with the axle center 19 comprising main shaft 17 29 (one of the first housing) composition of upper body 28 (of the second housing) and lower case.

As shown in Figure 1 and Figure 2, upper body 28 has upper flange portion 30 and upper bond face 31.In addition, such as Fig. 1, Fig. 3 Shown, lower case 29 has lower flange portion 32 and lower engagement face 33.Upper body 28 and lower case 29 are bonded with each other Composition surface 31,33, is linked by multiple bolts 45 (linking of mechanism).In addition, now, upper bond face 31 and lower bond Face 33 is contacted with face, and the seal member 34 between upper bond face 31 and lower engagement face 33 using multiple rope forms is sealed. As shown in figure 4, seal member 34 is made up of rubber (one of elastomeric material), shape of cross section is circular.

As shown in Fig. 3, Fig. 5 to Fig. 7, the composition surface 33 of lower case 29 (of a housing) formed it is multiple ( It is two in Fig. 3) seal groove 35.Seal member 34 is embedded into seal groove 35, and by 28 (the one of another housing of upper body Example) composition surface 31 press and with the compression ratio (such as 15～20%) that specifies seal groove 35 depth direction (i.e. upper and lower To) compressed.

In addition, the height under the non-compressed state of seal member 34 is set as H1 as shown in Figure 7 A, as shown in Figure 7 B will Height under compressive state is set as H2, then above-mentioned compression ratio C (%) is represented by equation below.

Compression ratio C=(H1-H2)/H1 × 100

Seal groove 35 is with width opposite a pair of sides 35a, 35b and being formed under two sides 35a, 35b Bottom surface 35c between end.It is open in the end face 20 of shell 12 in two ends of the length direction of seal groove 35.Such as Fig. 3, Fig. 5, Fig. 6, figure Shown in 7C to Fig. 7 F, in two end sections (of established part) of seal groove 35, the compression ratio ratio of seal member 34 is formed The high compression portion 36 of the compression ratio of above-mentioned regulation high (such as compression ratio is 35～40%).

High compression portion 36 has：Bottom surface 35c parallel with lower engagement face 33 terminal part 36a；Bottom surface 35c opposing lower portions connect 33 inclined rake 36b of conjunction face.

Seal groove 35 in the high compression portion 36 (i.e. terminal part 36a and rake 36b) shown in Fig. 5, Fig. 6 and Fig. 7 E Width W1 is identical with the width W2 of the seal groove 35 in the part 37 beyond the high compression portion shown in Fig. 5, Fig. 6, Fig. 7 A.In addition, Depth D1 of the seal groove 35 in the terminal part 36a of high compression portion 36 is than the seal groove 35 in the part 37 beyond high compression portion Depth D2 is shallow.Thus, the cross-sectional area of the seal groove 35 in the terminal part 36a of high compression portion 36 is than the portion beyond high compression portion The cross-sectional area of the seal groove 35 divided in 37 is little.

In addition, as shown in Figure 7 F, in the terminal part 36a of high compression portion 36, the filling of 34 opposing seal groove 35 of seal member Rate is 100%.In contrast to this, as shown in Figure 7 B, in the part 37 beyond high compression portion, above-mentioned pack completeness is than 100% low (example Such as from about 80%).

In addition, the cross-sectional area of seal groove 35 is set as A1, it is if the cross-sectional area of seal member 34 is A2, then above-mentioned to fill Fill out rate F (%) to be shown below.

Pack completeness F=A2/A1 × 100

In addition, as shown in Fig. 5, Fig. 6, Fig. 7 C, Fig. 7 D, the rake 36b of high compression portion 36 is formed in terminal part 36a and height Between part 37 beyond compression unit.

Inclined plane 38 is formed on the bottom surface 35c of the seal groove 35 in rake 36b.Inclined plane 38 is with the depth of seal groove 35 Parts 37 of the degree D3 from beyond high compression portion is inclined to the mode that the terminal part 36a of high compression portion 36 gradually becomes shallower as.

In addition, inclined plane 38 presses predetermined angular α inclinations.In addition, in rake 36b, as shown in Fig. 7 C, Fig. 7 D, close The corner that two sides 35a, 35b of sealing groove 35 and inclined plane 38 are intersected forms the bending section 40 of such as arc-shaped of smooth curved.

As shown in figure 5, in the composition surface 33 of lower case 29, in the end section (i.e. high compression portion 36) of seal groove 35 And the inner peripheral surface of axle through hole 18 between, the sealant coated portion 41 of the sealant for being coated with liquid is provided with.

In addition, as shown in figure 3, other seal groove 47 is formed in lower engagement face 33.In other seal groove 47 It is embedded to reduce the other seal member 48 for discharging the leakage between side room 15 and suction side room 16.

In addition, as shown in Figure 2 and Figure 3, the shaft sealing being provided with axle through hole 18 between sealing main shaft 17 and shell 12 23.As shown in figure 8, shaft sealing 23 has the annular shape between the inner peripheral surface and the outer peripheral face of main shaft 17 of seal shaft through hole 18 Multiple gland liners 50, and annular shape ring for the sealing liquid 51.Inner circumferential side channel 52 is formed on complete cycle in the inner peripheral surface of ring for the sealing liquid 51, Periphery side channel 53 is formed on complete cycle in the outer peripheral face of ring for the sealing liquid 51.In addition, multiple and inner circumferential side channel is formed on ring for the sealing liquid 51 The intercommunicating pore 54 in the 52 footpath directions connected with periphery side channel 53.

In the inside of the wall of shell 12, formed and shaft sealing 23 is supplied to simultaneously the water (one of liquid) in side room 15 is discharged The water shutoff path 55 (one of sealing liquid path) of the pair of right and left of water-stop (liquid seal) shaft sealing 23.

As shown in Fig. 1 to Fig. 3, Fig. 9, Figure 10, each water shutoff path 55 is respectively with the composition surface 33 of lower case 29 The first supply passageway 56 for being formed, and wall in upper body 28 the second supply passageway 57 being internally formed.

Wherein, as shown in Fig. 1, Fig. 3, Fig. 9, Figure 10, the first supply passageway 56 makes top and the separation of lower case 28,29 In the state of, it is the groove of the section quadrilateral shape for opening above.In addition, the first supply passageway 56 makes top and lower case 28th, in the state of 29 engagements, become the path of the inside of the wall for being located at shell 12.In addition, here, the described wall for being located at shell 12 Internal path, refers to the path as length direction using relative wall thickness direction generally normal direction, singly passes through in heavy wall direction Logical path is not appropriate for.In addition, the lower end of an end (upstream side) of the first supply passageway 56 and the second supply passageway 57 (downstream) connects, and the other end (downstream) is connected with the periphery side channel 53 of ring for the sealing liquid 51 as shown in Figure 8.

In addition, as shown in Figure 1, Figure 2, shown in Fig. 9, Figure 10, it is circular hole that the second supply passageway 57 is section, with medial extremity (upstream side) with discharge cross-drilled hole portion 58 that side room 15 connects, and lower end (downstream) vertical hole portion for connecting with the first supply passageway 56 59.In addition, 59 upper end of vertical hole portion is connected with cross-drilled hole portion 58, lower end is connected with the first supply passageway 56.In addition, cross-drilled hole portion 58 is outer Side is closed by stopper 60.

Hereinafter, illustrate the effect of above-mentioned composition.

The embedding sealing part 34 in seal groove 35 as shown in Figure 7, be bonded with each other composition surface 31,33 as shown in Figure 1, utilizes Bolt 45 links upper body 28 and lower case 29, assembles shell 12.Thus, depth direction of the seal member 34 in seal groove 35 Compressed with the compression ratio for specifying, sealed by seal member 34 between upper bond face 31 and lower engagement face 33.

As shown in figure 4, because seal member 34 is the part of the banding being made up of elastomeric material, as long as changing sealing The length and area of section of part 34 just can be adapted with each of the model of pump 11 or size.Therefore, with prior art Compared using the situation of chip packing like that, can significantly save the work cut off with the shape on composition surface 31,33 in consistent manner Husband.Thus, time during each manufacture seal member 34 of model or size by pump 11 can be greatly decreased, so sealing The manufacture of part 34 becomes easy.

In addition, compared with the situation using chip packing, because the pressure required for sealing reduces, it is possible to reduce spiral shell The radical or size of bolt 45.

In addition, because depth D1 (reference picture 7E) of the seal groove 35 in the terminal part 36a of high compression portion 36 compares high pressure Depth D2 (reference picture 7A) of the seal groove 35 in part 37 beyond contracting portion is shallow, so, seal member 34 can be in high compression More reliably sealed in portion 36.For this purpose, being identical with high compression portion 36 with the compression ratio for being configured to all of seal groove 35 The situation of compression ratio compare, it is possible to reduce the size of the radical or bolt 45 of bolt 45.

In addition, as shown in Figure 7 F, in the state of upper body 28 and lower case 29 link, at the end of high compression portion 36 In the 36a of end, the pack completeness of 34 opposing seal groove 35 of seal member is 100%.That is, seal groove 35 is by the sealing compressed Part 34 is seamlessly filled.When pump 11 is driven, by the hydraulic pressure in the hydraulic pressure and suction side room 16 discharged in side room 15 Difference so that a small amount of water (one of liquid) in shell 12 is flowed along its length in the inner side of seal member 34.But, The inner side of the seal member 34 carries over the flowing of the water of length direction, in seal groove 35 as shown in Figure 7 F by 34 nothing of seal member It is intercepted in the terminal part 36a of the high compression portion 36 for filling with gap.Furthermore it is possible to prevent in the vicinity of shaft sealing 23, shell Water in 12 the inner side of seal member 34 carry over length direction flowing and from the end section of seal groove 35 to the end face of shell 12 20 outside leakage.

In addition, as shown in fig. 6, part 37 from beyond high compression portion to the terminal part 36a of high compression portion 36 sealing The compression ratio of part 34 is gradually risen by the inclined plane 38 of rake 36b.For this purpose, can prevent above-mentioned compression ratio from suddenly swashing rises (change Change).Thus, good sealing can be carried out by seal member 34 in rake 36b.

In addition, in rake 36b, because the corner of seal groove 35 is formed as bending section 40, as illustrated in fig. 7d, Easily seamlessly filled by the seal member 34 of compression.Thus, the corner of seal member 34 and seal groove 35 can be eliminated Between gap, the flowing of water of length direction is carried in seal member 34 in high compression portion 36 (i.e. terminal part 36a and rake It is intercepted in 36b).

In addition, as shown in figure 5, the because sealant between the end section of seal groove 35 and the inner peripheral surface of axle through hole 18 Coated portion 41 is sealed by liquid sealant, so can prevent the water in shell 12 from passing through by the end section and axle of seal groove 35 Outside between from the inner peripheral surface of through hole 18 to the end face 20 of shell 12 leaks.

In addition, shown in Fig. 1 to Fig. 3, being rotated by making main shaft 17, impeller 25 is rotated, and is drawn into both sides from suction inlet 13 The water in suction side room 16 is discharged from outlet 14 through discharging side room 15.Now, as shown in Fig. 1 to Fig. 3, Fig. 9, Figure 10, discharge A part for water in side room 15 is existed by the second supply passageway 57 of water shutoff path 55 as sealing water (of axle envelope liquid) First supply passageway 56 flows, and supplies on complete cycle from the first supply passageway 56 to the periphery side channel 53 of ring for the sealing liquid 51, Jin Erru Shown in Fig. 8, supplied on complete cycle to inner circumferential side groove 52 by intercommunicating pore 54.Thus, seal water and be supplied to shaft sealing 23, axle is close Envelope portion 23 is by water-stop (liquid seal).Now, micro sealing water is in the periphery of the inner peripheral surface and main shaft 17 of gland liner 50 Flow to the direction in axle center 19 between face, only leak on a small quantity in the outside of shaft sealing 23.This prevents outside air from Shaft sealing 23 is invaded in shell 12, or suppresses the water in shell 12 that the amount of the outside of shell 12 is leaked into from shaft sealing 23.

In addition, water shutoff path 55 is formed from the second supply passageway 57 of upper body 28 and is formed at lower case 29 First supply passageway 56 on composition surface 33 is constituted.For this purpose, not needing outside pipe arrangement, 11 miniaturization of pump can be made.Further, can also prevent The damage of the outside pipe arrangement for only causing by the bad leak for causing of construction or by vibration.

(second embodiment)

Hereinafter, second embodiment of the present invention is illustrated while with reference to Figure 11.

In the above-described first embodiment, as one of established part of length direction of seal groove 35, such as Fig. 5 institutes Show, high compression portion 36 is formed in the end section of seal groove 35.On the other hand, in second embodiment of the present invention, such as scheme Shown in 11, the high compression portion 36 of seal groove 35 is formed in the periphery (position i.e. in the circle of enclosed with dashed lines) for discharging side room 15.

So, the flowing of the water of length direction is carried in the inner side of seal member 34, in seal groove 35 by seal member 34 It is intercepted in the high compression portion 36 for seamlessly filling.For this purpose, the water in discharge side room 15 can be prevented in seal member 34 Flow along its length and leak into suction side room 16 in inner side.If in addition, in the part and with liquid sealant, can be with The water for being more reliably prevented from discharging in side room 15 flows in the inner side of seal member 34 along its length and leaks into suction side room 16。

(the 3rd embodiment)

Hereinafter, third embodiment of the present invention is illustrated while with reference to Figure 12.

In the above-described first embodiment, as shown in figure 4, the shape of cross section of seal member 34 is done circular.With this Relatively, as the 3rd embodiment as shown in figure 12, the shape of cross section of seal member 34 is made lower flat and top is The semicolumn bodily form of semi-circular shape.Or, it is also possible to the shape of cross section of seal member 34 is formed as oval.

In addition, in the above-described first embodiment, as shown in fig. 6, high compression portion 36 has terminal part 36a and rake 36b, but the terminal part 36a that not necessarily must have bottom surface 35c parallel with composition surface 33, also can be only by inclining with inclined plane 38 Inclined portion 36b is formed.

In addition, in the above-described first embodiment, as shown in Fig. 7 C, Fig. 7 D, only in the high compression portion 36 of seal groove 35 Rake 36b forms bending section 40, but it is also possible to bending section 40 is formed in the whole length of seal groove 35.

In addition, in the above-described first embodiment, for the compression ratio for improving seal member 34 in high compression portion 36, change The area of section of seal groove 35 is become.On the other hand, it is also possible to do not change the area of section of seal groove 35, corresponded to by overstriking Diameter of seal member 34 of the part of high compression portion 36 etc., changes the shape of seal member 34, improves in high compression portion 36 The compression ratio of seal member 34.

Alternatively, it is also possible to high compression portion 36 is formed in the other seal groove 47 shown in Fig. 3.

In addition, the material or compression ratio of seal member 34 are not limited to the content described in above-mentioned first embodiment, Various modes can be formed in the range of without departing from its design.

(the 4th embodiment)

Hereinafter, the 4th embodiment of the present invention is illustrated while with reference to Figure 13.

In the above-described first embodiment, when water-stop is carried out to shaft sealing 23, need being most suitable for water-stop The sealing water of regulation hydraulic pressure is supplied to shaft sealing 23.Above-mentioned first embodiment, discharge side room 15 in hydraulic pressure with it is most suitable Regulation hydraulic pressure (such as 200～400kPa) in above-mentioned water-stop is identical or be effective in the case of being substantially the same.Hereinafter say The 4th bright embodiment, in the case where the hydraulic pressure in discharge side room 15 is higher than the regulation hydraulic pressure for being most suitable for above-mentioned water-stop, As shown in figure 13, throttle orifice part 67 (of the mechanism of decompressor) is set in water shutoff path 55.

The throttle orifice part 67 has the opening 69 of generally cylindrical base material 68 and L shape.In addition, opening 69 has There are first and second peristome 69a, 69b of the upper surface and outer peripheral face opening in base material 68.Throttle orifice part 67 is generally Half part is inserted into the bottom of the vertical hole portion 59 of the second supply passageway 57.The substantially the latter half of throttle orifice part 67 is embedded into First supply passageway 56.In addition, the first peristome 69a is connected with the second supply passageway 57, the supplies of the second peristome 69b and first Path 56 is connected.In addition, throttle orifice part 67 is using rotation stops such as pins, so as not to rotate in supply passageway 56,57.

So, the part for discharging the water in side room 15 flows in the second supply passageway 57, by throttle orifice part 67 Opening 69 flows in the first supply passageway 56, is supplied to the periphery side channel 53 of ring for the sealing liquid 51.Now, from discharging, side room 15 is interior to lead Enter sealing water pressure (such as 400～800kPa) by throttle orifice part 67 be reduced to authorized pressure (such as 200～ 400kPa), water-stop is carried out to shaft sealing 23 by the sealing water of optimum pressure.

In addition, because throttle orifice part 67 is arranged on water shutoff path 55, not being exposed to the outside of shell 12.Thus, may be used Make 11 further miniaturization of pump.In addition, as the mechanism of decompressor, need not make the shape of the groove of the first supply passageway 56 multiple by employing Miscellaneous throttle orifice part 67, can suppress being significantly increased for work manhours.Furthermore it is possible to easily throttle orifice part 67 is located at In water shutoff path 55.

(the 5th embodiment)

Hereinafter, the 5th embodiment of the present invention is illustrated while with reference to Figure 14 to Figure 17.

Escape route 71 is formed in lower case 29.The downstream of the vertical hole portion 59 of the second supply passageway 57 is branched off into One supply passageway 56 and escape route 71.Escape route 71 has the first escape route 72 and the second escape route 73.First escapes Ease path 72 is formed on the composition surface 33 of lower case 29.In addition, the first escape route 72 is in 28,29 points of top and lower case In the state of, it is the groove of the quadrilateral shape for opening above.Further, the first escape route 72 is in top and lower case 28,29 In the state of engagement, become the path of the inside of the wall for being located at shell 12.In addition, one end of the first escape route 72 and vertical hole portion 59 Connect with the first supply passageway 56.In addition, the section that the second escape route 73 is formed at the inside of the wall of lower case 29 is Circular hole, with the other end of the first escape route 72 and suction side room 16 is interior connects.

As shown in figure 17, first throttle hole portion part 75 (of the mechanism of decompressor) is set in water shutoff path 55.First throttle Hole portion part 75 has columned base material 76, and T-shaped opening 77.In addition, opening 77 is with the upper table in base material 76 Face and the first to the 3rd peristome 77a～77c of outer peripheral face opening.The substantially top half of first throttle hole portion part 75 is inserted into The bottom of the vertical hole portion 59 of the second supply passageway 57.The substantially the latter half of first throttle hole portion part 75 is embedded into the first supply The one end of path 56.In addition, the first peristome 77a is connected with the second supply passageway 57, the supplies of the second peristome 77b and first Path 56 is connected, and the 3rd peristome 77c is connected with the first escape route 72.

In the first escape route 72, the second throttle orifice part 79 (of the mechanism of decompressor) is set.Second throttle orifice part 79 With generally cylindrical base material 80, and linear opening 81.In addition, opening 81 is opened with the outer peripheral face in base material 80 First and second peristome 81a, 81b of mouth.In addition, first and second throttle orifice part 75,79 is by rotation stops such as pins, so as to each Do not rotate in path 56,57,71.In addition, the rotation preventive mechanism also has the function of preventing from coming off concurrently to the second throttle orifice part 79.

Hereinafter, illustrate the effect of above-mentioned composition.

The part for discharging the water in side room 15 flows in the second supply passageway 57, by first throttle hole portion part 75 77 affluent-dividing of opening is to the first supply passageway 56 and escape route 71.Now, it is flowed into the water conduct of the first supply passageway 56 Sealing water, is supplied to the periphery side channel 53 of ring for the sealing liquid 51.In addition, the water for being flowed into escape route 71 passes through the second throttle orifice part 79 opening 81 is supplied in suction side room 16.

Accordingly, because the flow of the water flowed in the second supply passageway 57 increases, flow velocity also increases therewith, it is possible to Fully reduced pressure by first throttle hole portion part 75.In addition, setting the constant determined by the shape of first throttle hole portion part 75 as f, it is located at The flow of the water flowed in the second supply passageway 57 is W, if decompression amount (pressure loss), subtracts for Δ P then by shown in following formula Pressure amount Δ P and flow W's square is directly proportional.

Δ P=f × W²

Therefore, even if in the case that the pressure ratio in discharge side room 15 is suitable to the authorized pressure height of water-stop, it is also possible to Make to be reduced sufficiently to authorized pressure from the pressure for discharging the sealing water that shaft sealing 23 is supplied in side room 15.

In addition, because the flow of the water flowed in escape route 71 is throttled by the second throttle orifice part 79, can be by The balance of above-mentioned first throttle hole portion part 75 and the second throttle orifice part 79, is adjusted to optimum pressure the pressure of sealing water Power.In addition, the second throttle orifice part 79 is easily located at the first escape route 72.

(the 6th embodiment)

Hereinafter, the 6th embodiment of the present invention is illustrated while with reference to Figure 18.

6th embodiment is that the 3rd is inserted in the vertical hole portion 59 of the second supply passageway 57 of above-mentioned 5th embodiment The mode of throttle orifice part 84.3rd throttle orifice part 84 is by columned base material 85, rill through hole 86b and books circulation hole 86d Constitute.In addition, little peristome 86as of the rill through hole 86b with an end face opening in base material 85.Books circulation hole 86d has In the big opening portion 86c of the base material 85 and little peristome 86a not end face opening of homonymy.In addition, rill through hole 86b and books circulation Hole 86d is connected in above-mentioned base material 85, and the diameter of rill through hole 86b is less than the diameter of books circulation hole 86d.

Thus, discharge the pressure ratio in side room 15 be suitable to water-stop authorized pressure is high, the pressure discharged in side room 15 In the case of big with the difference of above-mentioned authorized pressure, can be by increasing the 3rd throttle orifice part 84 for being inserted into vertical hole portion 59 Number, adjusts from the pressure for discharging the sealing water supplied to shaft sealing 23 in side room 15 and is accurately reduced to above-mentioned regulation Pressure.

In addition, in the case where the difference of the pressure discharged in side room 15 and the authorized pressure for being suitable to water-stop is little, Ke Yitong The number for reducing the 3rd throttle orifice part 84 for being inserted into vertical hole portion 59 is crossed, is adjusted from discharge side room 15 and is supplied to shaft sealing 23 The reduced pressure of the sealing water given is to above-mentioned authorized pressure.In addition, in figure 18, two the 3rd throttling hole portions are set as one Part 84, but it is also possible to arrange one or more than three.

In above-mentioned 4th to the 6th embodiment, as shown in Figure 13, Figure 17, Figure 18, cylindric throttling hole portion has been used Part 67,75,79,84, but it is also possible to using the throttle orifice part of such as polygon prism shape such as quadrangular or six prisms.In addition, for The throttle orifice part of polygon prism shape, throttle orifice part will not be rotated in the path.Therefore, it is not necessary to arrange throttle orifice part Rotation preventive mechanism.

In the 4th to the 6th above-mentioned embodiment, as one of the mechanism of decompressor using throttle orifice part 67,75, 79th, 84, but it is also possible to do not use throttle orifice part as shown in following 7th and the 8th embodiment.

(the 7th embodiment)

Hereinafter, the 7th embodiment of the present invention is illustrated while with reference to Figure 19.

88 (the mechanism of decompressor of first throttle portion for reducing flowing path section area is formed in the cross-drilled hole portion 58 of the second supply passageway 57 One).The second restriction 89 (of the mechanism of decompressor) for reducing flowing path section area is formed in vertical hole portion 59.

First throttle portion 88 is the diameter less than cross-drilled hole portion 58, and cross-drilled hole portion 58 is via first throttle portion 88 and discharge side room 15 Connection.In addition, the second restriction 89 is the diameter less than vertical hole portion 59, vertical hole portion 59 is via the second restriction 89 and cross-drilled hole portion 58 Connection.

Thus, a part for the water in side room 15 is discharged as water is sealed, it is logical in the first supply from the second supply passageway 57 Road 56 is flowed, and is supplied to the periphery side channel 53 of ring for the sealing liquid 51.Now, the hydraulic pressure of the sealing water for flowing in the second supply passageway 57 Authorized pressure is reduced to by first and second restriction 88,89.Thus, can be by the sealing water of optimum pressure to shaft sealing 23 carry out water-stop.

(the 8th embodiment)

Hereinafter, the 8th embodiment of the present invention is illustrated while with reference to Figure 20.

In the bottom surface of the first supply passageway 56, restriction 91 (of the mechanism of decompressor) prominent upward is formed.First Both ends of the surface 91a of the restriction 91 of the length direction of supply passageway 56 are seen in plane and are formed as arc-shaped.

Thus, as the height h1 ratios from the upper end of restriction 91 to lower engagement face 33 are from the bottom of the first supply passageway 56 Face is reduced to the height h2 of lower engagement face 33, so reducing the flowing path section face of the first supply passageway 56 by restriction 91 Product.

Therefore, the part in the water discharged in side room 15 flow from the second supply passageway 57 in the first supply passageway 56, When being supplied to the periphery side channel 53 of ring for the sealing liquid 51, the hydraulic pressure of the sealing water flowed in the first supply passageway 56 is dropped by restriction 91 It is low to authorized pressure.Thus, water-stop is carried out to shaft sealing 23 with the sealing water of optimum pressure.

In addition, in the above-described 8th embodiment, restriction 91 is located at the bottom surface of the first supply passageway 56, but it is also possible to Restriction 91 is located at escape route 71 to adjust the flow of the water flowed in escape route 71.

(the 9th embodiment)

Hereinafter, the 9th embodiment of the present invention is illustrated while with reference to Figure 21 to Figure 24.

First supply passageway 56 and the second supply passageway 57 are identically formed with foregoing first embodiment.Under Portion's housing 29 forms the escape route 93 from 56 branch of the first supply passageway.The downstream of escape route 93 is communicated to suction side room In 16.

Escape route 93 is formed in the composition surface 33 of lower case 29.In addition, escape route 93 is in top and lower case 28th, in the state of 29 separation, it is the groove of the quadrilateral shape for opening above.In addition, escape route 93 top and lower case 28, In the state of 29 engagements, become the path of the inside of the wall for being located at shell 12.

First and second throttle orifice part 94, the 95 (mechanisms of decompressor are embedded in the first supply passageway 56 of water shutoff path 55 One).In the embedded 3rd throttle orifice part 96 (of the mechanism of decompressor) of escape route 93.

First throttle hole portion part 94 has the base material 97 of rectangular-shape (or can also be cubic), and T-shaped stream Through hole 98.In addition, first to threeth peristome 98a of the opening 98 with the upper surface in base material 97 and two sides opening～ 98c.First peristome 98a is connected with the vertical hole portion 59 of the second supply passageway 57, the second peristome 98b and the first supply passageway 56 Connection.

Second throttle orifice part 95 has the base material 100 of rectangular-shape (or can also be cubic), and rectilinear Opening 101.In addition, opening 101 first and second peristome 101a, 101b with the two sides opening in base material 100. In addition, the 3rd throttle orifice part 96 with 95 identical of the second throttle orifice part constitute.

As shown in figure 24, the first supply passageway 56 predetermined portion bottom and escape route 93 predetermined portion bottom Portion, forms the bottom surface 102 than above-mentioned path 56,93 respectively and deeper submerges portion 103.First to the 3rd throttle orifice part 94～96 It is respectively embedded in the portion of submerging 103.

Hereinafter, illustrate the effect of above-mentioned composition.

The part for discharging the water in side room 15 flows in the second supply passageway 57, by first throttle hole portion part 94 Opening 98 flows in the first supply passageway 56, after by the opening 101 of the second throttle orifice part 95, affluent-dividing to first Supply passageway 56 and escape route 93.The water flow through in the first supply passageway 56 is supplied to the periphery side channel 53 of ring for the sealing liquid 51. In addition, the water flow through in escape route 93 is supplied in suction side room 16 by the opening 101 of the 3rd throttle orifice part 96.

Accordingly, because the flow of the water flowed in first and second supply passageway 56,57 increases, flow velocity also increases therewith Plus, so can sufficiently be reduced pressure by first and second throttle orifice part 94,95.Therefore, even if discharging in side room 15 In the case that pressure ratio is suitable to the authorized pressure height of water-stop, can make to be supplied to the close of shaft sealing 23 from discharge side room 15 The pressure of water shutoff fully drops to authorized pressure.

In addition, because the flow of the water flowed in escape route 93 is throttled by the 3rd throttle orifice part 96, it is possible to By the balance of the first to the 3rd throttle orifice part 94～96, the pressure of sealing water is adjusted to optimum pressure.

In addition, because the first to the 3rd throttle orifice part 94～96 is rectangular-shape respectively, each throttle orifice can be prevented Part 94～96 is rotated in each path 56,93.Further, because the first to the 3rd throttle orifice part 94～96 is respectively embedded in not Enter portion 103, so can prevent each throttle orifice part 94～96 from shifting in the flowing direction.

In addition, in the above-described 9th embodiment, the second throttle orifice part 95 and the 3rd throttle orifice part 96 are respectively set respectively Put one, but it is also possible to which multiple second throttle orifice parts 95 or the 3rd throttle orifice part 96 are set, the pressure of sealing water has been adjusted Power.Or, it is also possible to be not provided with the first to the 3rd throttle orifice part 94～96 at least any one.

In the above-mentioned first to the 9th embodiment, using lower case 29 as one of the first housing, in lower case 29 define the first supply passageway 56 and escape route 71,73, using upper body 28 as one of the second housing, in upper case Body 28 defines the second supply passageway 57.On the other hand, also can be using upper body 28 as one of the first housing, in upper case Body 28 forms the first supply passageway 56 and escape route 71,73, using lower case 29 as one of the second housing, in lower case Body 29 forms the second supply passageway 57.

(the tenth embodiment)

Hereinafter, the tenth embodiment of the present invention is illustrated while with reference to Figure 25 to Figure 27.

In above-mentioned first to the 9th embodiment, the second supply passageway 57 is formed in upper body 28.On the other hand, with In tenth embodiment of lower explanation, as shown in Figure 25 to Figure 27, the second supply passageway 57 is not formed in upper body 28, under Portion's housing 29 forms the first supply passageway 56 and escape route 93.

First supply passageway, 56 one end (upstream side) with discharge side room 15 connect, while the other end (downstream) with The periphery side channel 53 of ring for the sealing liquid 51 is connected.Escape route 93 is held and suction side room 16 downstream from 56 branch of the first supply passageway Interior connection.

First supply passageway 56 and escape route 93 are respectively formed at the lower engagement face 33 of lower case 29.In addition, the One supply passageway 56 and escape route 93 in the state of top and lower case 28,29 separate, are four for opening above respectively The groove of side shape.In addition, the state that the first supply passageway 56 and escape route 93 are engaged in top and lower case 28,29 respectively Under, become the path of the inside of the wall for being located at shell 12.

First throttle hole portion part 105 (one of the mechanism of decompressor) is embedded in the first supply passageway 56.In escape route 93 Embedded second throttle orifice part 106 (of the mechanism of decompressor).First and second throttle orifice part 105,106 has rectangular respectively The base material 107 of body shape (or cubic can also), and linear opening 108.In addition, opening 108 is with base material First and second peristome 108a, 108b of 107 two sides opening.

In addition, it is identical with foregoing 9th embodiment, in the first supply passageway 56 and the difference shape of escape route 93 Into portion of submerging 103, first and second throttle orifice part 105,106 is respectively embedded in the portion of submerging 103.

Hereinafter, illustrate the effect of above-mentioned composition.

The part for discharging the water in side room 15 flows in the first supply passageway 56, by first throttle hole portion part 105 Opening 108 after, affluent-dividing is to the first supply passageway 56 and escape route 93.Now, flow through in the first supply passageway 56 Water be supplied to the periphery side channel 53 of ring for the sealing liquid 51.In addition, the water flow through in escape route 93 passes through the second throttle orifice part 106 opening 108 is supplied in suction side room 16.

Accordingly, because the flow of the water flowed in the first supply passageway 56 increases, flow velocity also increases therewith, so can be by First throttle hole portion part 105 fully reduces pressure.Therefore, even if the pressure ratio in discharge side room 15 is suitable to the authorized pressure of water-stop In the case of height, it is also possible to which the pressure of the sealing water supplied to shaft sealing 23 from discharge side room 15 is reduced sufficiently to regulation Pressure.

In addition, because the flow of the water flowed in escape route 93 is throttled by the second throttle orifice part 106, it is possible to By the balance of first and second throttle orifice part 105,106, the pressure of sealing water is adjusted to optimum pressure.

In addition, in the above-described 10th embodiment, first throttle hole portion part 105 and the second throttle orifice part 106 are each respectively It is provided with one, but it is also possible to 105 or multiple second throttle orifice part 106 of multiple first throttle hole portion parts is set, adjusts close The pressure of water shutoff, or, adjust the flow of the water flowed in escape route 93.Or, it is also possible to it is not provided with first and second In throttle orifice part 105,106 at least any one.

In the above-described 10th embodiment, formed in lower case 29 using lower case 29 as one of the first housing First supply passageway 56 and escape route 93, using upper body 28 as one of the second housing.On the other hand, it is also possible to upper Portion's housing 28 one as the first housing, forms the first supply passageway 56 and escape route 93 in upper body 28, bottom Housing 29 one as the second housing.

(the 11st embodiment)

Hereinafter, the 11st embodiment of the present invention is illustrated while with reference to Figure 28.

In the cross-drilled hole portion 58 of the second supply passageway 57, filter 110 (of trapping foreign matter part) is set.

So, the decorating films such as the rubbish in the sealing water that water shutoff path 55 flows are mixed into by the capture of filter 110.By This, can prevent the decorating films such as rubbish from blocking in the downstream side region in cross-drilled hole portion 58.In addition, by pulling down stopper 60, can be easy Filter 110 is taken out, is changed or is cleaned filter 110.In addition, filter 110 can also be located at vertical hole portion 59, or can also It is located in the first supply passageway 56.

(the 12nd embodiment)

Hereinafter, the 12nd embodiment of the present invention is illustrated while with reference to Figure 29.

Back washing stream 111 is formed in upper body 28.Back washing with one end of stream 111 upper body 28 end face 20 Opening.The other end of back washing stream 111 is connected with the periphery side channel 53 of ring for the sealing liquid 51.In addition, the one end of back washing with stream 111 By 115 (one of bolt) closing of the stopper freely assembled and disassembled.

So, in back washing water shutoff path 55, stopper 115 is pulled down from one end of back washing stream 111, is flowed in back washing One end connection superinverse wash water supply pipe arrangement on road 111 etc., is supplied to one end of back washing stream 111 back washing water 112.By This, back washing water 112 reaches the periphery side channel 53 of ring for the sealing liquid 51 in back washing with flowing in stream 111, flows in outer circumferential side groove 53 It is dynamic, and flowed in inner circumferential side channel 52 by intercommunicating pore 54, from inner circumferential side channel 52 and periphery side channel 53 in water shutoff path 55 The first supply passageway 56, adverse current in vertical hole portion 59 and cross-drilled hole portion 58, discharge to side room 15 is discharged.Thus, back washing water shutoff path 55, the decorating film such as rubbish in exclusion water shutoff path 55.

After back washing terminates, it is turned off in one end installing stopper 115 of back washing stream 111.

In addition, in above-mentioned 12nd embodiment, back washing stream 111 being formed in upper body 28, but also may be used To be formed in lower case 29.

(the 13rd embodiment)

Hereinafter, the 13rd embodiment of the present invention is illustrated while with reference to Figure 30.

In the case where water shutoff path 55 is not used, block 113 is set in the first supply passageway 56 and escape route 93 etc. (one of shut-off block), the first supply passageway 56 of closing and escape route 93.Thus, seal water to supply from side room 15 is discharged It is given to ring for the sealing liquid 51.

In addition, in the case of back washing shown in Figure 29 is defined in above-mentioned 13rd embodiment with stream 111, can be with Water shutoff is supplied from the outside of pump 11 to shaft sealing 23 using back washing stream 111.Now, by arranging as described above piece Body 113, is supplied to the sealing water of shaft sealing 23 from back washing stream 111 because being closed by block 113, will not be first 93 adverse current of supply passageway 56 and escape route.

Can also be configured in the above-mentioned first to the 12nd embodiment, by forming throttling by rubber elastomeric material Hole portion part, can adjust the diameter of opening, so as to adjust the decompression amount formed by throttle orifice part by applying external force.

In the above-mentioned first to the 13rd embodiment, double suction has been included as the one of pump and entered volute pump 11, but also may be used Being pump that such as single suction enters the other forms such as volute pump or multistage pump.

In the above-mentioned first to the 13rd embodiment, water shutoff path 55 has been internally formed in the wall of shell 12, but also may be used It is not form water shutoff path 55, same with the pump 120 of the prior art shown in Figure 33, outside pipe arrangement is set in shell 12, sealing Water is supplied to ring for the sealing liquid 51 from side room 15 is discharged.

Claims

1. a kind of pump, the pump engage the first housing and the second housing via composition surface and constitute shell,

Suction side room is formed with shell and side room is discharged, it is characterised in that

The axle through hole of main shaft institute insertion is provided with shell,

The shaft sealing between sealing main shaft and shell is provided with axle through hole,

Sealing liquid path has been internally formed in the wall of shell, the sealing liquid path to shaft sealing supply liquid in discharge side room and with Liquid seal shaft sealing,

Sealing liquid path at least has the first supply passageway of the channel-shaped on the composition surface for being formed at the first housing,

First supply passageway is located at the inside of the wall of shell in the state of the first housing and the second housing is engaged,

The escape route from the first supply passageway branch is formed with first shell body,

The downstream of escape route is connected with the room of suction side.

2. a kind of pump, the pump engage the first housing and the second housing via composition surface and constitute shell,

The axle through hole of main shaft institute insertion is provided with shell,

Sealing liquid path has to be formed at and the first supply passageway of the first housing and is formed at the second supply passageway of the second housing,

Escape route is formed with first shell body,

The downstream of the second supply passageway is branched off into the first supply passageway and escape route,

The downstream of escape route is connected with the room of suction side.

3. pump as claimed in claim 1 or 2, it is characterised in that be provided with the mechanism of decompressor in sealing liquid path, the mechanism of decompressor make from The reduced pressure of the sealing liquid flowed to shaft sealing in discharge side room is to authorized pressure.

4. pump as claimed in claim 3, it is characterised in that the mechanism of decompressor is built-in the throttle orifice part of sealing liquid path.

5. pump as claimed in claim 1 or 2, it is characterised in that be provided with trapping foreign matter part in sealing liquid path.

6. pump as claimed in claim 1 or 2, it is characterised in that end face opening and the other end and shaft sealing of the one end in shell The back washing stream of connection is formed at shell.

7. a kind of using method of pump, it is characterised in that the using method of the pump is the pump described in the claims 1 or 2 Using method, in the case where sealing liquid path is not used, arranges shut-off block in sealing liquid path, closes sealing liquid path.