CN104500450B - The application method of pump and pump - Google Patents

Abstract

The pump of the present invention and the application method of pump will be sealed by the seal member (34) for the rope form being made up of elastomeric material between the composition surface (33) of the first housing (29) and the composition surface (31) of the second housing (28).Seal member (34), which is embedded into, to be formed in the seal groove of the composition surface of the first housing (29) (33) (35), and the depth direction with defined compression ratio in seal groove (35) is compressed by composition surface (31) pressing of the second housing (28).In the compression ratio of the established part formation seal member (34) of the length direction of seal groove (35) high compression portion (36) higher than above-mentioned defined compression ratio.

Description

The application method of pump and pump

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

Technical field

The present invention relates to via composition surface with engaging the pump of shell formed by the first housing and the second housing and its pump Application method.

Background technology

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

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

But, it is necessary to cut off pad 129 so that the shape on itself and composition surface 127,128 is kissed in above-mentioned existing form Close.Therefore, each of the model or size for pump 120 need to make the variform (sealing of various gasket 129 Part), the problem of making that there is pad 129 spends time.In addition, in order to fully ensure that the face padded needed for 129 is installed in fastening Pressure, the problem of needing also exist for increasing the quantity of bolt 126 (connecting member) or increase the size of bolt 126.

In addition, as known pump, as shown in figure 33, there is the axle through hole that 135 insertions of main shaft are set 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 sets 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 in discharge side volute chamber 138 with connecting, and the other end and the shaft sealing 137 of outside pipe arrangement 139 connect It is logical.

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

In addition, the pump 120 for setting outside pipe arrangement 139 in the outside of shell 121 as described above, 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 setting outside pipe arrangement 139 on shell 121, there is pump 120 The problem of maximization, the spatial volume needed for for setting pump 120 increase.

In addition, the vibration also existed when constructional difficulties are produced leak or acted by pump by construction is bad makes outside pipe arrangement 139 vibrations and the problem of 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 for 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 and discharge side room are formed in shell, it is characterised in that

The sealing for the rope form being made up of elastomeric material is utilized between the composition surface of first housing and the composition surface of the second housing 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 Defined compression ratio is compressed,

Length direction of the compression ratio of the seal member high compression portion formation higher than above-mentioned defined compression ratio in seal groove Established part.

Constituted according to such, seal member is embedded into seal groove, be bonded with each other composition surface, and connected using connecting member The housing of knot first and the second housing, assemble shell.Thus, seal member is pressed with defined compression ratio to the depth direction of seal groove Contracting, is sealed between the composition surface of the first housing and the composition surface of the second housing by seal member.

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

In addition, liquid a small amount of in the seal groove beyond high compression portion, shell in the inner side of seal member along its length Flowing.The most of of flowing carried on the inside of seal member in the liquid of length direction 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 flowing 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 quantity of part or the size of connecting member.

The pump of second aspect of the 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,

Axle through hole the spindle axis direction of shell end face opening,

The end of the length direction of seal groove shell end face opening,

End section of the high compression portion formation in seal groove.

Constituted according to such, can prevent liquid in shell along its length seal member inner side flowing and from sealing The end section of groove is leaked to the outside of the end face of shell.In addition, because the end of seal groove 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 between the inner peripheral surface of axle through hole.

Constituted according to such, by liquid sealing between the end section of seal groove and the inner peripheral surface of axle through hole Agent is sealed.Therefore, can prevent liquid in shell by between the end section of seal groove and the inner peripheral surface of axle through hole 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 small.

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.

Constituted according to such, seal member can be sealed more reliably in high compression portion.With the pressure of whole region Shrinkage turns into 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 quantity of part or the size of connecting member.

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,

Inclined plane is tilted in the way of the depth of seal groove gradually becomes shallower as from the part beyond high compression portion.

Constituted according to such, because part of the compression ratio of seal member beyond high compression portion is gradually become by inclined plane Height, so can prevent above-mentioned compression ratio from suddenly swashing to rise (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 of seal groove and bottom is intersected Portion forms the bending section of smooth curved.

Constituted according to such, 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 the seal member of compression and the corner of seal groove be eliminated, in length Degree direction carries over the most of 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.

Constituted according to such, seal groove high compression portion above-mentioned pack completeness for 100% part by the sealing compressed Part is seamlessly filled.Therefore, carried 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, provided with sealing main shaft and shell between shaft sealing, shell wall be internally formed it is close to axle Envelope portion supplies the liquid in discharge side room and by the sealing liquid path of hydraulic seal shaft sealing.

According to it is such constitute, by main axis, pump act, be inhaled into suction side room liquid 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.Therefore, axle Sealing is by hydraulic seal.Thus, it is possible to prevent the air of outside from entering from shaft sealing in shell.Or, it 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 is minimized.And then, it is also possible to prevent the damage or leakage of the outside pipe arrangement caused by vibration.

The pump of tenth aspect present invention, it is characterised in that sealing liquid path at least has 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.

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

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

Constituted according to such, 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 hydraulic seal.

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

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

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

Constituted according to such, 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.

The pump of the aspect 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 in the room of suction side with connecting.

Constituted according to such, when a part for the liquid in discharge side room flows in the first supply passageway, on its way In separately flow to the first supply passageway and escape route.Wherein, the liquid flowed in 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 flowed in sealing liquid path increases Plus, flow velocity also increases therewith.Therefore, setting the mechanism of decompressor that axle envelope liquid can be made fully to depressurize on sealing liquid path.Therefore, even if Pressure ratio in discharge side room be suitable to hydraulic seal authorized pressure it is high when, can also pass through and decompression is set on sealing liquid path Mechanism, makes the pressure for being supplied to the axle envelope liquid of shaft sealing out of discharge side room be reduced to defined pressure.

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

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

Constituted according to such, a part for the liquid in discharge side room is logical from the second supply by the second supply passageway Road separately flows to the first supply passageway and escape route.Wherein, the liquid flowed 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 being flowed in the second supply passageway Liquid flow increase, flow velocity also increases therewith, thus on sealing liquid path set the mechanism of decompressor axle envelope liquid can be made abundant Decompression.Therefore, the pressure ratio in discharge side room be suitable to hydraulic seal authorized pressure it is high when, can also be by sealing liquid The mechanism of decompressor is set the pressure for being supplied to the axle envelope liquid of shaft sealing in discharge side room is reduced to defined pressure on path.

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

Constituted according to such, the pressure ratio in discharge side room is suitable to the authorized pressure using hydraulic seal shaft sealing Gao Shi, the pressure that the axle envelope liquid of shaft sealing is supplied to out of discharge side room is reduced to defined pressure by setting the mechanism of decompressor Power.Thus, it is possible to carry out hydraulic seal to shaft sealing with the axle envelope liquid of optimum pressure.

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

The pump of the aspect 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.

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

The pump of the aspect of the present invention the 17th, sets trapping foreign matter part on sealing liquid path.

According to decorating films such as such rubbish for constituting, being mixed into the sealing water (axle envelope water) flowed on sealing liquid path It can be captured by trapping foreign matter part.Thus, it is possible to prevent the decorating films such as rubbish from blocking sealing liquid path.

The pump of the aspect 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 formation is on shell.

Constituted according to such, 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, by shaft sealing, the adverse current in sealing liquid path, to the discharge of discharge side room.Thus, it is inverse The decorating films such as the rubbish washed in sealing liquid path, exclusion sealing liquid path.

The present invention the 19th aspect, it is characterised in that be it is above-mentioned 9th aspect described in pump application method, without 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, the part of the liquid in discharge side room is not as axle envelope liquid in use, can To be changed without pump, by the sealing liquid path of shut-off block closed interior, pump is operated using from outside sealing liquid.

The pump of the aspect of the present invention the 20th, sets suction side room and discharge side room in shell,

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

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

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

Provided with the shaft sealing between sealing main shaft and shell in axle through hole, it is characterised in that

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

According to it is such constitute, by main axis, pump act, be inhaled into suction side room liquid 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 hydraulic seal.Thus, it is possible to prevent extraneous air from entering from shaft sealing in shell, 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 making Pump is minimized.And then, prevented also from the damage or leakage by vibrating the outside pipe arrangement formed.

Brief 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 stereogram 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 Fig. 6 A Y1-Y1 direction views.

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

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

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

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

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

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 stereograms 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 stereogram.

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

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 stereogram of escape route.

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

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

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

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

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 Figure 20 A X-X direction views.

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 stereogram.

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 stereogram.

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 stereogram.

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 for the pump for representing prior art.

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 be 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) connected with outlet 14 and the left and right sides positioned at discharge side room 15 and and suction inlet 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 the direction of spindle axis 19 be open.In addition, setting impeller 25 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 drive devices such as motor (omit and illustrate).

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

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 (one that links mechanism).In addition, now, upper bond face 31 and lower bond Face 33 is contacted with face, is sealed between upper bond face 31 and lower engagement face 33 using the seal member 34 of multiple rope forms. 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, formed on the composition surface 33 of lower case 29 (one of a housing) it is multiple ( It is two in Fig. 3) seal groove 35.Seal member 34 is embedded into seal groove 35, and by (the one of another housing of upper body 28 Example) composition surface 31 press and with defined compression ratio (such as 15~20%) 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 into 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 following formula.

Compression ratio C=(H1-H2)/H1 × 100

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

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

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, The depth D1 of 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 small.

In addition, as shown in Figure 7 F, in the terminal part 36a of high compression portion 36, the filling of the opposing seal groove 35 of seal member 34 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 (example lower than 100% 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 Rate F (%) is filled out 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 formation of high compression portion 36 is in terminal part 36a and height Between part 37 beyond compression unit.

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

In addition, inclined plane 38 is tilted by predetermined angular α.In addition, in rake 36b, as shown in Fig. 7 C, Fig. 7 D, close The corner that two sides 35a, 35b and inclined plane 38 of sealing groove 35 intersect 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 Between the inner peripheral surface of axle through hole 18, provided with the sealant coated portion 41 for being coated with liquid sealant.

In addition, as shown in figure 3, forming other seal groove 47 in lower engagement face 33.In other seal groove 47 The embedded other seal member 48 for reducing the leakage between discharge side room 15 and suction side room 16.

In addition, as shown in Figure 2 and Figure 3, provided with the shaft sealing between sealing main shaft 17 and shell 12 in axle through hole 18 23.As shown in figure 8, shaft sealing 23 has the annular shape between the inner peripheral surface of seal shaft through hole 18 and the outer peripheral face of main shaft 17 Multiple glands pad 50 and circular 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, forming multiple and inner circumferential side channel 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 the water (one of liquid) in discharge side room 15 is supplied to shaft sealing 23 simultaneously The water shutoff path 55 (one of sealing liquid path) of the pair of right and left of water-stop (hydraulic seal) shaft sealing 23.

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

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 section quadrilateral shape open above.In addition, the first supply passageway 56 makes top and lower case 28th, in the state of 29 engagements, the path of the inside as the wall for being located at shell 12.In addition, here, the described wall for being located at shell 12 Internal path, refers to using the generally normal direction in relative wall thickness direction as the path of length direction, is singly passed through in heavy wall direction Logical path is not appropriate for.In addition, an end (upstream side) of the first supply passageway 56 and the lower end of the second supply passageway 57 (downstream) is connected, 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, the second supply passageway 57 is that section is circular hole, with medial extremity The vertical hole portion that the cross-drilled hole portion 58 and lower end (downstream) that (upstream side) is connected with discharge side room 15 are connected with the first supply passageway 56 59.In addition, the upper end of vertical hole portion 59 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 plug 60.

Hereinafter, the effect of above-mentioned composition is illustrated.

The embedding sealing part 34 as shown in Figure 7 in seal groove 35, 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, sealed between upper bond face 31 and lower engagement face 33 by seal member 34 with defined compression ratio.

As shown in figure 4, because seal member 34 is the part for the banding being made up of elastomeric material, as long as changing sealing The length and area of section of part 34 can be just adapted with each of the model of pump 11 or size.Therefore, with prior art Compared like that using the situation of chip packing, can significantly save the work cut off in consistent manner with the shape on composition surface 31,33 Husband.Thus, can be greatly decreased by pump 11 model or size each manufacture seal member 34 when time, 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 the depth D1 (reference picture 7E) of the seal groove 35 in the terminal part 36a of high compression portion 36 compares high pressure The 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.Therefore, being identical with high compression portion 36 with the compression ratio for being configured to all seal grooves 35 The situation of compression ratio compare, it is possible to reduce the radical of bolt 45 or the size 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 the opposing seal groove 35 of seal member 34 is 100%.That is, seal groove 35 is by the sealing compressed Part 34 is seamlessly filled.When pump 11 is driven, by discharging the hydraulic pressure in hydraulic pressure and suction side room 16 in side room 15 Difference so that a small amount of water (one of liquid) in shell 12 flows 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 the nothing of seal member 34 It is intercepted in the terminal part 36a of the high compression portion 36 filled with gap.Furthermore it is possible to prevent in the vicinity of shaft sealing 23, shell Water in 12 length direction flowing is carried in the inner side of seal member 34 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, from the part 37 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 rake 36b inclined plane 38.Therefore, can prevent above-mentioned compression ratio from suddenly swashing to rise (to become 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 end section because of seal groove 35 and the sealant between 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 being passed through by the end section and axle of seal groove 35 Leaked between the inner peripheral surface of through hole 18 to the outside of the end face 20 of shell 12.

In addition, shown in Fig. 1 to Fig. 3, by rotating main shaft 17, impeller 25 is rotated, and both sides are drawn into from suction inlet 13 The water in suction side room 16 is discharged by discharge side room 15 from outlet 14.Now, as shown in Fig. 1 to Fig. 3, Fig. 9, Figure 10, discharge A part for water in side room 15 is existed as sealing water (one of axle envelope liquid) by the second supply passageway 57 of water shutoff path 55 First supply passageway 56 is flowed, and the periphery side channel 53 from the first supply passageway 56 to ring for the sealing liquid 51 is supplied on complete cycle, Jin Erru Shown in Fig. 8, supplied by intercommunicating pore 54 to inner circumferential side groove 52 on complete cycle.Thus, sealing water is supplied to shaft sealing 23, and axle is close Envelope portion 23 is by water-stop (hydraulic seal).Now, micro sealing water pads the periphery of 50 inner peripheral surface and main shaft 17 in gland Flow, only leaked on a small quantity in the outside of shaft sealing 23 to the direction in axle center 19 between face.This prevents outside air from In the intrusion shell 12 of shaft sealing 23, or the water suppressed in shell 12 leaks into the amount of the outside of shell 12 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.It therefore, not needing outside pipe arrangement, can minimize pump 11.And then, it can also prevent Only by the bad leak caused or the damage of the outside pipe arrangement caused by vibration of constructing.

(second embodiment)

Hereinafter, second embodiment of the present invention is illustrated while reference picture 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, in the end section formation high compression portion 36 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 on the periphery (position i.e. in the circle of enclosed with dashed lines) in discharge 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 seamlessly filled.Therefore, 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, can be with addition, in the part and with liquid sealant The water for being more reliably prevented from discharging in side room 15 flows and leaks into suction side room along its length in the inner side of seal member 34 16。

(the 3rd embodiment)

Hereinafter, third embodiment of the present invention is illustrated while reference picture 12.

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

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 must not necessarily have the bottom surface 35c terminal part 36as 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 formation 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, in order to improve the compression ratio of seal member 34 in high compression portion 36, changing The area of section of seal groove 35 is become.On the other hand, the area of section of seal groove 35 can not also be changed, 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, is improved in high compression portion 36 The compression ratio of seal member 34.

Alternatively, it is also possible to form high compression portion 36 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 its design is not departed from.

(the 4th embodiment)

Hereinafter, the 4th embodiment to the present invention while reference picture 13 is illustrated.

In the above-described first embodiment, when carrying out water-stop to shaft sealing 23, it is necessary to 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 is effective in the case of being substantially the same.Say below The 4th bright embodiment, discharge side room 15 in hydraulic pressure it is higher than the regulation hydraulic pressure for being most suitable for above-mentioned water-stop in the case of, As shown in figure 13, throttle orifice part 67 (one of the mechanism of decompressor) is set in water shutoff path 55.

The throttle orifice part 67 has generally cylindrical base material 68 and the opening 69 of L shape.In addition, opening 69 has There are first and second opening portion 69a, 69b in the upper surface of base material 68 and outer peripheral face opening.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 opening portion 69a is connected with the second supply passageway 57, the supplies of the second opening portion 69b and first Path 56 is connected.In addition, throttle orifice part 67 is using rotation stops such as pins, so as not to be rotated in supply passageway 56,57.

So, a part for the water in discharge side room 15 flows in the second supply passageway 57, passes through 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, led out of discharge side room 15 The pressure (such as 400~800kPa) of the sealing water entered 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, the outside of shell 12 is not exposed to.Thus, may be used Make the further miniaturization of pump 11.In addition, as the mechanism of decompressor, being answered by using the shape for the groove that need not make the first supply passageway 56 Miscellaneous throttle orifice part 67, can suppress being significantly increased for work manhours.Furthermore it is possible to which easily throttle orifice part 67 is located at In water shutoff path 55.

(the 5th embodiment)

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

Escape route 71 is formed in lower case 29.The downstream of the vertical hole portion 59 of 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 top and lower case 28,29 points It is the groove of quadrilateral shape open above from the state of.And then, the first escape route 72 is in top and lower case 28,29 In the state of engagement, the path of the inside as the wall for being located at shell 12.In addition, one end of the first escape route 72 and vertical hole portion 59 Connected 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 being connected in the other end of the first escape route 72 and suction side room 16.

As shown in figure 17, first throttle hole portion part 75 (one 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 has the upper table in base material 76 Face and the first to the 3rd opening portion 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 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 opening portion 77a is connected with the second supply passageway 57, the supplies of the second opening portion 77b and first Path 56 is connected, and the 3rd opening portion 77c is connected with the first escape route 72.

In the first escape route 72, the second throttle orifice part 79 (one of the mechanism of decompressor) is set.Second throttle orifice part 79 With generally cylindrical base material 80 and linear opening 81.In addition, there is opening 81 outer peripheral face in base material 80 to open First and second opening portion 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 rotated 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, the effect of above-mentioned composition is illustrated.

A part for water in discharge side room 15 flows in the second supply passageway 57, passes through first throttle hole portion part 75 The branch of opening 77 flows to the first supply passageway 56 and escape route 71.Now, it is flowed into the water conduct of the first supply passageway 56 Water is sealed, the periphery side channel 53 of ring for the sealing liquid 51 is supplied to.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 increase of the water flowed in the second supply passageway 57, flow velocity also increases therewith, it is possible to Fully depressurized 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 second supply passageway 57 is W, if if decompression amount (pressure loss) is Δ P, then as shown in following formula, subtracting Pressure amount Δ P and flow W's square is directly proportional.

Δ P=f × W²

Therefore, can also in the case that the pressure ratio in discharge side room 15 is suitable to the authorized pressure height of water-stop The pressure for the sealing water for being supplied to shaft sealing 23 out of discharge side room 15 is set to be reduced sufficiently to authorized pressure.

, can be by addition, because the flow of the water flowed in escape route 71 is throttled by the second throttle orifice part 79 The pressure of sealing water, is adjusted to optimum pressure by the balance of above-mentioned first throttle hole portion part 75 and the second throttle orifice part 79 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 to the present invention while reference picture 18 is illustrated.

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, rill through hole 86b has the small opening portion 86a in an end face opening of base material 85.Books circulation hole 86d has In the big opening portion 86c of base material 85 and small opening portion 86a not end face openings of homonymy.In addition, rill through hole 86b and books circulation Hole 86d is connected in above-mentioned base material 85, and rill through hole 86b diameter is smaller than books circulation hole 86d diameter.

Thus, the pressure ratio in discharge side room 15 is suitable to the pressure that the authorized pressure of water-stop is high, discharge in side room 15 With the difference of above-mentioned authorized pressure it is big in the case of, the 3rd throttle orifice part 84 of vertical hole portion 59 can be inserted into by increase Number, adjusts the pressure of the sealing water supplied out of discharge side room 15 to shaft sealing 23 and is accurately reduced to above-mentioned regulation Pressure.

In addition, discharge side room 15 in pressure and suitable for the difference of the authorized pressure of water-stop it is small in the case of, Ke Yitong The number for reducing the 3rd throttle orifice part 84 for being inserted into vertical hole portion 59 is crossed, adjustment is supplied out of discharge side room 15 to shaft sealing 23 The pressure for the sealing water given is reduced 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 set 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 use the throttle orifice part of the 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 path.Therefore, it is not necessary to set 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 without using throttle orifice part as shown in following 7th and the 8th embodiment.

(the 7th embodiment)

Hereinafter, the 7th embodiment to the present invention while reference picture 19 is illustrated.

(the mechanism of decompressor of first throttle portion 88 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 (one of the mechanism of decompressor) of flowing path section area is reduced in the formation of vertical hole portion 59.

First throttle portion 88 is the diameter smaller 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 smaller 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 discharge side room 15 is logical in the first supply from the second supply passageway 57 as sealing water 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 flowed 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 to the present invention while reference picture 20 is illustrated.

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

Thus, because the height h1 from the upper end of restriction 91 to lower engagement face 33 is than from the bottom of the first supply passageway 56 Face reduces 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, a part for the water in discharge side room 15 flowed 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 arrive 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 to the present invention while reference picture 21 is to Figure 24 is illustrated.

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 the branch of the first supply passageway 56.The downstream of escape route 93 is communicated to suction side room In 16.

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

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

First throttle hole portion part 94 has the base material 97 and T-shaped stream of rectangular-shape (or can also be cubic) Through hole 98.In addition, opening 98 have the upper surface of base material 97 and two sides opening the first to the 3rd opening portion 98a~ 98c.First opening portion 98a is connected with the vertical hole portion 59 of the second supply passageway 57, the second opening portion 98b and the first supply passageway 56 Connection.

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

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

Hereinafter, the effect of above-mentioned composition is illustrated.

A part for water in discharge side room 15 flows in the second supply passageway 57, passes through first throttle hole portion part 94 Opening 98 flows in the first supply passageway 56, and after the opening 101 by the second throttle orifice part 95, branch flows to first Supply passageway 56 and escape route 93.The water flowed 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 flowed 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 increase of the water flowed in first and second supply passageway 56,57, flow velocity also increases therewith Plus, so can sufficiently be depressurized by first and second throttle orifice part 94,95.Therefore, in discharge side room 15 In the case that pressure ratio is suitable to the authorized pressure height of water-stop, it can make to be supplied to the close of shaft sealing 23 out of 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.And then, 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 One is put, but it is also possible to which multiple second throttle orifice parts 95 or the 3rd throttle orifice part 96 are set, to adjust the pressure of sealing water Power.Or, can also 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 form 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 forms 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 Formation the first supply passageway 56 and escape route 71,73 of body 28, using lower case 29 as one of the second housing, in lower case The second supply passageway 57 of formation of body 29.

(the tenth embodiment)

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

In above-mentioned first to the 9th embodiment, in the second supply passageway 57 of formation of 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 The first supply passageway 56 of formation of portion's housing 29 and escape route 93.

The one end (upstream side) of first supply passageway 56 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 from the branch of the first supply passageway 56, and end is with sucking side room 16 downstream 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 are above open four respectively in the state of top and lower case 28,29 are separated 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, the path of the inside as the wall for being located at shell 12.

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

A part for water in discharge side room 15 flows in the first supply passageway 56, passes through first throttle hole portion part 105 Opening 108 after, branch flows to the first supply passageway 56 and escape route 93.Now, flowed 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 flowed 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 increase of the water flowed in the first supply passageway 56, flow velocity also increases therewith, so can be by First throttle hole portion part 105 is fully depressurized.Therefore, the pressure ratio in discharge side room 15 is suitable to the authorized pressure of water-stop In the case of height, the pressure of the sealing water supplied out of discharge side room 15 to shaft sealing 23 can also be 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 close to adjust there is provided one, but it is also possible to set multiple throttle orifice parts 106 of first throttle hole portion part 105 or multiple second The pressure of water shutoff, or, adjust the flow of the water flowed in escape route 93.Or, first and second can also be not provided with In throttle orifice part 105,106 at least any one.

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

(the 11st embodiment)

Hereinafter, the 11st embodiment to the present invention while reference picture 28 is illustrated.

In the cross-drilled hole portion 58 of the second supply passageway 57, filter 110 (one 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 being blocked in the downstream side region in cross-drilled hole portion 58.In addition, by pulling down plug 60, can be easy Filter 110 is taken out, filter 110 is changed or clean.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 to the present invention while reference picture 29 is illustrated.

In the formation back washing stream 111 of 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 (one of the bolt) closing of plug 115 freely assembled and disassembled.

So, in back washing water shutoff path 55, plug 115 is pulled down from back washing with one end of stream 111, in back washing stream One end connection superinverse wash water supply pipe arrangement on road 111 etc., is supplied to back washing water 112 one end of back washing stream 111.By This, back washing water 112 flows and reached the periphery side channel 53 of ring for the sealing liquid 51 in back washing stream 111, is flowed in outer circumferential side groove 53 It is dynamic, and flowed by intercommunicating pore 54 in inner circumferential side groove 52, from inner circumferential side channel 52 and periphery side channel 53 in water shutoff path 55 The first supply passageway 56, vertical hole portion 59 and cross-drilled hole portion 58 in adverse current, to discharge side room 15 discharge.Thus, back washing water shutoff path 55, exclude the decorating films such as rubbish in 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 is formed in upper body 28, but also may be used To be formed in lower case 29.

(the 13rd embodiment)

Hereinafter, the 13rd embodiment to the present invention while reference picture 30 is illustrated.

In the case of without using water shutoff path 55, block 113 is set in the first supply passageway 56 and the grade of escape route 93 (one of shut-off block), the first supply passageway 56 of closing and escape route 93.Thus, sealing water will not be supplied from discharge side room 15 It is given to ring for the sealing liquid 51.

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

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

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

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

Claims (12)

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

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

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

In axle through hole provided with the shaft sealing between sealing main shaft and shell,

By the seal member for the rope form being made up of elastomeric material between the composition surface of first housing and the composition surface of the second housing Sealing,

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

Seal member is embedded into seal groove, and by another housing composition surface pressing and seal groove depth direction with Defined compression ratio is compressed,

Exist high compression portion that seal member compressed with the compression ratio higher than above-mentioned defined compression ratio and seal member with Part beyond the high compression portion that compression ratio as defined in above-mentioned is compressed,

The high compression portion is formed at the established part of the length direction of seal groove, and the high compression portion is located at shaft sealing Vicinity,

The leakage reduced between discharge side room and suction side room is set in the housing on the composition surface of the housing of bottom Other seal member.

2. pump as claimed in claim 1, it is characterised in that shell is divided into the first housing and second shell by the plane comprising main shaft Body,

Axle through hole the spindle axis direction of shell end face opening,

The end of the length direction of seal groove shell end face opening,

End section of the high compression portion formation in seal groove.

3. pump as claimed in claim 2, it is characterised in that in the composition surface of a housing, in the end section of seal groove Provided with the sealant coated portion for being coated with liquid sealant between the inner peripheral surface of axle through hole.

4. pump as claimed in claim 1, it is characterised in that the area of section of the seal groove in high compression portion than high compression portion with The area of section of outer seal groove is small.

5. the pump as any one of Claims 1-4, it is characterised in that the depth ratio of the seal groove in high compression portion The depth as shallow of seal groove beyond high compression portion.

6. pump as claimed in claim 5, it is characterised in that the bottom surface of the seal groove in high compression portion is formed with inclined plane,

Inclined plane is tilted in the way of the depth of seal groove gradually becomes shallower as from the part beyond high compression portion.

7. pump as claimed in claim 6, it is characterised in that the corner that the inclined plane in the two sides of seal groove and bottom is intersected It is formed with the bending section of smooth curved.

8. pump as claimed in claim 1, it is characterised in that there is high compression portion the pack completeness of seal member opposing seal groove to be 100% part.

9. pump as claimed in claim 1, it is characterised in that

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

Sealing liquid path has been internally formed in the wall of shell,

Sealing liquid path supplies liquid in discharge side room and with hydraulic seal shaft sealing to shaft sealing.

10. pump as claimed in claim 9, it is characterised in that

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.

11. pump as claimed in claim 10, it is characterised in that the upstream side of the first supply passageway is connected with discharge side room, and And first the downstream of supply passageway connected with shaft sealing.

12. pump as claimed in claim 10, it is characterised in that

Sealing liquid path has the second supply passageway for being formed at the second housing,

The upstream side of second supply passageway is connected with discharge side room, and the downstream of the second supply passageway and the first supply passageway Connection,

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