A non-contact seal test device for rotary machines

Abstract

The present application belongs to the technical field of non-contact seal of rotary machinery, and particularly relates to a non-contact seal test device for rotary machinery, comprising: an axial seal seat; an axial seal test assembly, which is communicatively arranged on one side of the axial seal seat; a radial seal test assembly, which is communicatively arranged on the other side of the axial seal seat; a liquid inlet assembly, which is communicatively arranged in the middle of the axial seal seat; and a pump shaft, which traverses the middle of the axial seal seat and is drivingly connected with the axial seal test assembly and the radial seal test assembly. The present application can simultaneously obtain test conclusions from the axial seal test assembly and the radial seal test assembly, and can also realize separate testing of axial seal performance and radial seal performance by controlling the opening and closing of the axial seal test assembly or the radial seal test assembly, so as to realize simultaneous testing or separate testing of axial seal performance and radial seal performance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of non-contact sealing of rotary machinery, and particularly relates to a non-contact sealing test device for rotary machinery. BACKGROUND

[0002] At present, the labyrinth seal and the spiral seal are commonly used non-contact sealing forms for rotary machinery. For rotary machinery, especially high-speed rotary machinery, the effectiveness of the seal is crucial to the safe and stable operation of the rotary machinery.

[0003] The commonly used labyrinth seal or spiral seal has two forms of axial arrangement and radial arrangement. In order to obtain a high-reliability labyrinth seal or spiral seal structure parameter, it is necessary to test and analyze the labyrinth seal or spiral seal. At present, there are not many general test devices specially for the performance of the labyrinth seal or spiral seal, especially a comprehensive sealing test bench that can simultaneously test the axial arrangement and radial arrangement of the labyrinth seal or spiral seal. Therefore, a non-contact sealing test device for rotary machinery is urgently needed to solve the problem. SUMMARY

[0004] The purpose of the present application is to provide a non-contact sealing test device for rotary machinery to solve the above problems.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] A non-contact sealing test device for rotary machinery, comprising:

[0007] an axial sealing seat;

[0008] an axial sealing test assembly, which is communicatively arranged on one side of the axial sealing seat;

[0009] a radial sealing test assembly, which is communicatively arranged on the other side of the axial sealing seat;

[0010] a liquid inlet assembly, which is communicatively arranged in the middle of the axial sealing seat;

[0011] a pump shaft, which transversely passes through the middle of the axial sealing seat, and is drivingly connected with the axial sealing test assembly and the radial sealing test assembly.

[0012] Preferably, the axial sealing test assembly comprises an axial sealing test part and an axial sealing part arranged in sequence along the liquid flow direction, the axial sealing test part is arranged inside the middle of the axial sealing seat, and the axial sealing part is sealingly arranged at the end of the axial sealing seat.

[0013] The axial sealing test part and the axial sealing part are drivingly connected with the pump shaft.

[0014] The liquid inlet end of the axial sealing test part is communicated with the inner side of the middle part of the axial sealing seat;

[0015] The first liquid discharge assembly is arranged between the axial sealing test part and the axial sealing part, and the liquid outlet end of the axial sealing test part is communicated with the liquid inlet end of the first liquid discharge assembly.

[0016] Preferably, the axial sealing test part comprises an axial sealing outer seal, which is fixed in the inner side of the axial sealing seat by a positioning ring;

[0017] The axial sealing inner seal is coaxially arranged in the axial sealing outer seal;

[0018] The axial sealing cavity is formed between the axial sealing outer seal and the axial sealing inner seal, and the axial sealing structure is arranged in the axial sealing cavity;

[0019] The liquid inlet end of the axial sealing cavity is communicated with the liquid outlet end of the liquid inlet assembly;

[0020] The liquid outlet end of the axial sealing cavity is communicated with the liquid inlet end of the first liquid discharge assembly;

[0021] The axial sealing inner seal is coaxially fixed in the middle part of the pump shaft;

[0022] The axial sealing cavity is provided with an axial sealing detection part.

[0023] One end of the axial sealing outer seal abuts against one side of the step arranged in the middle part of the inner side of the axial sealing seat, and the other end of the axial sealing outer seal is limited and matched with the positioning ring, which is coaxially fixed in the axial sealing seat.

[0024] One end of the axial sealing inner seal abuts against the shaft shoulder arranged in the middle part of the pump shaft, and the other end of the axial sealing inner seal is fixed with the middle part of the pump shaft through a second fixing nut, the second fixing nut is threadedly connected with the middle part of the pump shaft, the second fixing nut extrudes the axial sealing inner seal on the shaft shoulder arranged in the middle part of the pump shaft to realize the installation of the axial sealing inner seal, and the axial sealing inner seal is radially limited and matched with the pump shaft through a second spline.

[0025] The axial sealing structure is one of a spiral sealing structure, a labyrinth sealing structure or a planar sealing structure.

[0026] Preferably, the axial sealing detection part comprises a plurality of first pressure and temperature sensors, the detection end of the first pressure and temperature sensor extends into the axial sealing cavity, and the fixed end of the first pressure and temperature sensor is fixed on the side wall of the axial sealing seat.

[0027] The axial sealing seat side wall is provided with a test hole for mounting the fixed end of the first pressure temperature sensor.

[0028] Preferably, the axial sealing part comprises a second mechanical sealing suspension, which is coaxially fixed to one end of the axial sealing seat, coaxially arranged outside the pump shaft, and sealed and matched with the pump shaft through a second mechanical seal;

[0029] The pump shaft passes through the middle part of the second mechanical seal, and the pump shaft is drivingly connected with the second mechanical seal;

[0030] The second mechanical sealing suspension is coaxially fixed to a second bearing bracket on the side away from the axial sealing seat, and the second bearing bracket is rotatably connected with the pump shaft through a second bearing;

[0031] The second bearing bracket is fixed to a first bearing end cover at one end away from the axial sealing seat, and the end of the pump shaft passes through the center of the first bearing end cover.

[0032] The second bearing bracket, the second mechanical sealing suspension and the axial sealing seat are fixed together by a first bolt, which passes through the second bearing bracket, the second mechanical sealing suspension and the axial sealing seat in turn and is fastened by cooperating with a nut.

[0033] One end of the pump shaft passing through the first bearing end cover is provided with a third spline, which is used to connect with the output shaft of the driving device, and the output shaft of the driving device is radially limited and matched with the pump shaft through the third spline, so that it can drive the pump shaft to rotate.

[0034] Preferably, the first liquid discharge assembly comprises a first outlet pipeline, the liquid inlet end of which is in communication with the cavity surrounded by the second mechanical sealing suspension, the axial sealing seat, the positioning ring and the pump shaft, and the liquid outlet end of the first outlet pipeline is sequentially provided with a first pressure gauge, a first flow meter and a left outlet valve.

[0035] Preferably, the radial sealing test assembly comprises a radial sealing test part and a radial sealing part arranged in sequence along the liquid flow direction, the radial sealing test part is arranged on the side of the axial sealing seat away from the liquid inlet assembly, and the liquid inlet end of the radial sealing test part is in communication with the end of the axial sealing seat.

[0036] The liquid outlet end of the radial seal test part is communicated with the liquid inlet end of a second liquid discharge assembly; the second liquid discharge assembly is installed on a first mechanical seal suspension, which is coaxially fixed at the end of the radial seal test part, and the middle part of the first mechanical seal suspension is sealingly matched with the radial seal part;

[0037] The pump shaft is drivingly connected with the radial seal test part and the radial seal part.

[0038] Preferably, the radial seal test part comprises a radial seal right side sealing element, which is coaxially fixed at one side of the axial seal seat; the first mechanical seal suspension is coaxially fixed at the side of the radial seal right side sealing element away from the axial seal seat;

[0039] The radial seal right side sealing element is rotationally connected with a radial seal left side sealing element at the side away from the first mechanical seal suspension, the radial seal left side sealing element is located in the axial seal seat, and a radial seal cavity is formed between the radial seal left side sealing element and the axial seal seat;

[0040] The liquid inlet end of the radial seal cavity is communicated with the liquid inlet end of the liquid inlet assembly;

[0041] The liquid outlet end of the radial seal cavity is communicated with the liquid inlet end of the second liquid discharge assembly;

[0042] A radial seal structure is arranged in the radial seal cavity;

[0043] A radial seal detection part is arranged in the radial seal cavity, and the radial seal detection part is installed on the first mechanical seal suspension;

[0044] The radial seal detection part comprises a plurality of second pressure and temperature sensors, the detection end of the second pressure and temperature sensor is located in the radial seal cavity, and the fixed end of the second pressure and temperature sensor is fixed on the first mechanical seal suspension;

[0045] The radial seal left side sealing element is coaxially fixed on the pump shaft.

[0046] One end of the radial seal left side sealing element abuts against the shaft shoulder of the pump shaft, the pump shaft is threadedly connected with a first fixing nut, the first fixing nut extrudes the radial seal left side sealing element against the shaft shoulder of the pump shaft to realize the installation of the radial seal left side sealing element, and the pump shaft is radially limited in cooperation with the radial seal left side sealing element through first splines.

[0047] The first mechanical seal suspension is coaxially fixed on the radial seal right side sealing element through third bolts.

[0048] The first mechanical seal suspension is provided with a plurality of test holes for mounting the second pressure and temperature sensor.

[0049] Preferably, the radial seal part comprises a first mechanical seal element sealingly fitted on the side of the first mechanical seal suspension away from the radial seal right side seal element, the pump shaft passes through the middle part of the first mechanical seal element, the pump shaft is in driving connection with the first mechanical seal element, a first bearing bracket is coaxially arranged outside the first mechanical seal suspension, the first bearing bracket is fixedly connected with the end part of the axial seal seat in a coaxial manner, the first bearing bracket is in rotary connection with the end part of the pump shaft through a first bearing, and the end part of the first bearing bracket away from the axial seal seat is fixedly connected with a second bearing end cover in a coaxial manner.

[0050] The radial seal right side seal element and the first bearing bracket are fixedly connected with the end part of the axial seal seat through a second bolt, the second bolt passes through the first bearing bracket, the radial seal right side seal element and the axial seal seat in sequence and is fixed by cooperating with a nut.

[0051] Preferably, the second liquid discharge assembly comprises a second outlet pipeline, the liquid inlet end of the second outlet pipeline is in communication with the cavity formed by the radial seal right side seal element, the first mechanical seal suspension, the first mechanical seal element and the pump shaft, and the liquid outlet end of the second outlet pipeline is in communication with a third pressure gauge, a third flowmeter and a second valve in sequence.

[0052] Preferably, the liquid inlet assembly comprises an inlet pipeline, the liquid outlet end of the inlet pipeline is in communication with the inner cavity of the middle part of the axial seal seat, and the liquid inlet end of the inlet pipeline is in communication with a second pressure gauge, a second flowmeter and a first valve in sequence.

[0053] Compared with the prior art, the present application has the following advantages and technical effects:

[0054] In use, the pump shaft is connected with a driving device to drive the pump shaft to rotate, the axial seal test assembly and the radial seal test assembly are driven by the pump shaft to operate, liquid is injected into the liquid inlet assembly, the liquid moves to both sides after entering the axial seal seat and enters the axial seal test assembly and the radial seal test assembly respectively, and test conclusions are obtained by the axial seal test assembly and the radial seal test assembly simultaneously, the axial seal performance and the radial seal performance can be tested separately by controlling the opening and closing of the axial seal test assembly or the radial seal test assembly, the axial seal performance and the radial seal performance can be tested simultaneously or separately, and the present application can also be used for testing the non-contact seal fitting of other rotary machines. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings described below only represent some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0056] Figure 1 Structure diagram of the present application;

[0057] Figure 2 Structure diagram of the present application Figure 1 Structure diagram of the present application

[0058] 1, pump shaft; 2, first bearing end cover; 3, left side outlet valve; 4, first bolt; 5, first flow meter; 6, first outlet pipeline; 7, first pressure gauge; 8, first pressure temperature sensor; 9, second pressure gauge; 10, first valve; 11, inlet pipeline; 12, second flow meter; 13, radial seal right side sealing element; 14, second bolt; 15, first bearing bracket; 16, second pressure temperature sensor; 17, second outlet pipeline; 18, third pressure gauge; 19, third flow meter; 20, first mechanical sealing element; 21, second valve; 22, second bearing end cover; 23, first bearing; 24, first mechanical sealing suspension; 25, first fixed nut; 26, first spline; 27, third bolt; 28, radial seal left side sealing element; 29, axial seal inner side sealing element; 30, second spline; 31, axial seal outer side sealing element; 32, positioning snap ring; 33, second fixed nut; 34, axial seal seat; 35, second mechanical sealing suspension; 36, second mechanical sealing element; 37, second bearing bracket; 38, second bearing; 39, third spline. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art without creative effort based on these embodiments also belong to the protection scope of the present application.

[0060] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0061] With reference to Figures 1 to 2 The present application discloses a kind of rotary machine non-contact seal test device, including:

[0062] axial seal seat 34;

[0063] axial sealing test assembly, which is arranged in communication with one side of the axial sealing seat 34;

[0064] radial sealing test assembly, which is arranged in communication with the other side of the axial sealing seat 34;

[0065] liquid inlet assembly, which is arranged in communication with the middle part of the axial sealing seat 34;

[0066] pump shaft 1, which passes through the middle part of the axial sealing seat 34 and is in driving connection with the axial sealing test assembly and the radial sealing test assembly.

[0067] In use, the pump shaft 1 is connected with a driving device to drive the pump shaft 1 to rotate, and the pump shaft 1 drives the axial sealing test assembly and the radial sealing test assembly to operate. Liquid is injected into the liquid inlet assembly, and the liquid moves to both sides after entering the axial sealing seat 34 and enters the axial sealing test assembly and the radial sealing test assembly, respectively. The test conclusions are obtained by the axial sealing test assembly and the radial sealing test assembly at the same time. The axial sealing performance and the radial sealing performance can be tested separately by controlling the opening and closing of the axial sealing test assembly or the radial sealing test assembly. The axial sealing performance and the radial sealing performance can be tested simultaneously or separately. The test device can also be used for testing the non-contact sealing cooperation of other rotary machines.

[0068] In a further optimized scheme, the axial sealing test assembly comprises an axial sealing test part and an axial sealing part arranged in sequence along the liquid flow direction. The axial sealing test part is arranged inside the middle part of the axial sealing seat 34, and the axial sealing part is arranged at the end of the axial sealing seat 34.

[0069] The axial sealing test part and the axial sealing part are in driving connection with the pump shaft 1.

[0070] The liquid inlet end of the axial sealing test part is in communication with the inside of the middle part of the axial sealing seat 34.

[0071] A first liquid discharge assembly is arranged between the axial sealing test part and the axial sealing part, and the liquid outlet end of the axial sealing test part is in communication with the liquid inlet end of the first liquid discharge assembly.

[0072] In a further optimized scheme, the axial sealing test part comprises an axial sealing outer sealing member 31, which is fixedly connected to the inside of the axial sealing seat 34 through a positioning clasp 32.

[0073] The axial sealing inner sealing member 29 is coaxially arranged inside the axial sealing outer sealing member 31.

[0074] The axial sealing outer sealing member 31 and the axial sealing inner sealing member 29 form an axial sealing cavity therebetween, and an axial sealing structure is arranged in the axial sealing cavity.

[0075] The liquid inlet end of the axial sealing cavity is communicated with the liquid outlet end of the liquid inlet assembly.

[0076] The liquid outlet end of the axial sealing cavity is communicated with the liquid inlet end of the first liquid outlet assembly.

[0077] The axial sealing inner seal 29 is coaxially fixed to the middle part of the pump shaft 1.

[0078] The axial sealing cavity is provided with an axial sealing detection part.

[0079] The axial sealing outer seal 31 is installed in the axial sealing seat 34, one end of the axial sealing outer seal 31 abuts against one side of the step in the middle part of the inner side of the axial sealing seat 34, the other end of the axial sealing outer seal 31 is limited and matched with the positioning snap ring 32, the positioning snap ring 32 is coaxially fixed in the axial sealing seat 34, and the positioning of the axial sealing outer seal 31 is realized by the positioning snap ring 32 and the upper step of the axial sealing seat 34.

[0080] One end of the axial sealing inner seal 29 abuts against the shaft shoulder arranged in the middle part of the pump shaft 1, the other end of the axial sealing inner seal 29 is fixed to the middle part of the pump shaft 1 through the second fixing nut 33, the second fixing nut 33 is threadedly connected with the middle part of the pump shaft 1, the right side of the axial sealing inner seal 29 is positioned by the shaft shoulder, the left side of the axial sealing inner seal 29 is positioned by the second fixing nut 33, the second fixing nut 33 extrudes the axial sealing inner seal 29 on the shaft shoulder arranged in the middle part of the pump shaft 1 to realize the installation of the axial sealing inner seal 29, the axial sealing inner seal 29 is radially limited and matched with the pump shaft 1 through the second spline 30, the axial sealing inner seal 29 is provided with a key groove, and is matched with the second spline 30 to rotate with the pump shaft 1.

[0081] The axial sealing structure is one of a spiral sealing structure, a labyrinth sealing structure or a planar sealing structure, threads or labyrinth grooves arranged on the matching surface of the axial sealing outer seal 31 and the axial sealing inner seal 29 form sealing cooperation, and an axial sealing test section is formed.

[0082] In a further optimization scheme, the axial sealing detection part comprises a plurality of first pressure and temperature sensors 8, the detection end of the first pressure and temperature sensor 8 extends into the axial sealing cavity, and the fixed end of the first pressure and temperature sensor 8 is fixed to the side wall of the axial sealing seat 34.

[0083] A test hole is arranged on the side wall of the axial sealing seat 34, and the test hole is used for mounting the fixed end of the first pressure and temperature sensor 8.

[0084] A test hole is arranged on the axial sealing outer seal 31, the test hole is coaxial with the test hole arranged on the axial sealing seat 34, and a temperature test probe of the first pressure and temperature sensor 8 is located in the test hole.

[0085] Further optimization scheme, the axial sealing part comprises a second mechanical seal suspension 35, the second mechanical seal suspension 35 is coaxially fixed with one end of the axial sealing seat 34, the second mechanical seal suspension 35 is coaxially arranged on the outside of the pump shaft 1, and the second mechanical seal suspension 35 is sealingly connected with the pump shaft 1 through the second mechanical seal 36;

[0086] The pump shaft 1 penetrates the middle part of the second mechanical seal 36, and the pump shaft 1 is in transmission connection with the second mechanical seal 36;

[0087] The second mechanical seal suspension 35 is coaxially fixed with a second bearing bracket 37 away from one side of the axial sealing seat 34, and the second bearing bracket 37 is in rotary connection with the pump shaft 1 through a second bearing 38;

[0088] The second bearing bracket 37 is fixed with a first bearing end cover 2 away from one end of the axial sealing seat 34, and the end of the pump shaft 1 penetrates the center of the first bearing end cover 2.

[0089] The second bearing bracket 37, the second mechanical seal suspension 35 and the axial sealing seat 34 are connected into an integrated whole through the first bolt 4, and the first bolt 4 is fastened through cooperation with a nut after penetrating the second bearing bracket 37, the second mechanical seal suspension 35 and the axial sealing seat 34 in sequence.

[0090] One end of the pump shaft 1 penetrating the first bearing end cover 2 is provided with a third spline 39, the third spline 39 is used for being connected with an output shaft of a driving device, and the output shaft of the driving device is in radial limiting fit with the pump shaft 1 through the third spline 39, so that the output shaft of the driving device can drive the pump shaft 1 to rotate.

[0091] The driving device is preferably a driving motor, the third spline 39 on the pump shaft 1 is connected with the driving motor, and a transmission end is formed.

[0092] The first bearing end cover 2, the second bearing 38 on the pump shaft 1 and the second bearing bracket 37 form a left bearing support, and the second mechanical seal suspension 35 and the second mechanical seal 36 form a left sealing element.

[0093] The second mechanical seal 36 is a prior art, which will not be described here.

[0094] One end of the second mechanical seal 36 is connected with the pump shaft 1, and the other end of the second mechanical seal 36 is connected with the second mechanical seal suspension 35, so as to form a mechanical seal.

[0095] Further optimization scheme, the first liquid discharge assembly comprises a first outlet pipeline 6, a liquid inlet end of the first outlet pipeline 6 is in communication with a cavity surrounded by the second mechanical seal suspension 35, the axial sealing seat 34, the positioning snap ring 32 and the pump shaft 1, and a liquid outlet end of the first outlet pipeline 6 is sequentially and communicatively provided with a first pressure gauge 7, a first flowmeter 5 and a left outlet valve 3.

[0096] Further optimization scheme, the radial seal test assembly includes radial seal test part and radial seal part arranged in sequence along the liquid flow direction, the radial seal test part is arranged at the side away from the liquid inlet assembly of the axial seal seat 34, the liquid inlet end of the radial seal test part is communicated with the end of the axial seal seat 34;

[0097] The liquid outlet end of the radial seal test part is communicated with the liquid inlet end of the second liquid discharge assembly; the second liquid discharge assembly is installed on the first mechanical seal suspension 24, the first mechanical seal suspension 24 is coaxially fixed at the end of the radial seal test part, and the middle part of the first mechanical seal suspension 24 is sealingly matched with the radial seal part;

[0098] The pump shaft 1 is drivingly connected with the radial seal test part and the radial seal part.

[0099] Further optimization scheme, the radial seal test part includes a radial seal right side sealing piece 13, which is coaxially fixed at one side of the axial seal seat 34; the first mechanical seal suspension 24 is coaxially fixed at the side away from the axial seal seat 34 of the radial seal right side sealing piece 13;

[0100] The radial seal right side sealing piece 13 is rotatably connected with a radial seal left side sealing piece 28 at the side away from the first mechanical seal suspension 24, the radial seal left side sealing piece 28 is located in the axial seal seat 34, and the radial seal left side sealing piece 28 and the axial seal seat 34 form a radial seal cavity therebetween;

[0101] The liquid inlet end of the radial seal cavity is communicated with the liquid inlet end of the liquid inlet assembly;

[0102] The liquid outlet end of the radial seal cavity is communicated with the liquid inlet end of the second liquid discharge assembly;

[0103] The radial seal cavity is provided with a radial seal structure;

[0104] The radial seal cavity is provided with a radial seal detection part, and the radial seal detection part is installed on the first mechanical seal suspension 24;

[0105] The radial seal detection part includes a plurality of second pressure temperature sensors 16, the detection end of the second pressure temperature sensor 16 is located in the radial seal cavity, and the fixed end of the second pressure temperature sensor 16 is fixedly connected to the first mechanical seal suspension 24;

[0106] The radial seal left side sealing piece 28 is coaxially fixed on the pump shaft 1.

[0107] One end of the radial seal left seal 28 abuts against the shaft shoulder of the pump shaft 1, the first fixed nut 25 is threadedly connected with the pump shaft 1, the first fixed nut 25 extrudes the radial seal left seal 28 against the shaft shoulder of the pump shaft 1 to realize the installation of the radial seal left seal 28, the radial seal left seal 28 is installed on the pump shaft 1, the left side is positioned by the shaft shoulder and the right side is positioned by the first fixed nut 25, a key groove is formed on the radial seal left seal 28, which cooperates with the first spline 26 to rotate with the pump shaft 1, and the pump shaft 1 is in radial limiting cooperation with the radial seal left seal 28 through the first spline 26.

[0108] The first mechanical seal suspension 24 is coaxially fixed to the radial seal right seal 13 through the third bolt 27.

[0109] A plurality of test holes for installing the second pressure temperature sensor 16 are formed on the first mechanical seal suspension 24. A test hole is formed on the radial seal right seal 13, the test hole on the radial seal right seal 13 corresponds to the test hole on the first mechanical seal suspension 24, and the temperature test probe of the second pressure temperature sensor 16 is located in the test hole.

[0110] The cooperation surface of the radial seal left seal 28 and the radial seal right seal 13 is provided with a radial seal structure, which is one of a labyrinth seal structure or a plane seal structure, and is a radial seal test section.

[0111] In a further optimization scheme, the radial seal part comprises a first mechanical seal 20 which is sealingly matched on the side of the first mechanical seal suspension 24 away from the radial seal right seal 13; the pump shaft 1 passes through the middle part of the first mechanical seal 20, the pump shaft 1 is in transmission connection with the first mechanical seal 20, the first mechanical seal suspension 24 is coaxially sleeved with a first bearing bracket 15, the first bearing bracket 15 is coaxially fixed to the end part of the axial seal seat 34, the first bearing bracket 15 is in rotation connection with the end part of the pump shaft 1 through a first bearing 23, and the end part of the first bearing bracket 15 away from the axial seal seat 34 is coaxially fixed with a second bearing end cover 22.

[0112] The radial seal right seal 13, the first bearing bracket 15 and the axial seal seat 34 are connected through the second bolt 14.

[0113] The radial seal right seal 13 and the first bearing bracket 15 are fixed to the end part of the axial seal seat 34 through the second bolt 14, the second bolt 14 passes through the first bearing bracket 15, the radial seal right seal 13 and the axial seal seat 34 in sequence and realizes the fixation of the first bearing bracket 15, the radial seal right seal 13 and the axial seal seat 34 through cooperation with a nut.

[0114] The second bearing end cover 22, the first bearing 23 and the first bearing bracket 15 form a right bearing support device.

[0115] Further optimization scheme, the second liquid discharge assembly includes a second outlet pipeline 17, the liquid inlet end of the second outlet pipeline 17 is communicated with the cavity formed by the radial seal right side sealing element 13, the first mechanical seal suspension 24, the first mechanical seal 20 and the pump shaft 1, and the liquid outlet end of the second outlet pipeline 17 is sequentially communicated with the third pressure gauge 18, the third flowmeter 19 and the second valve 21.

[0116] Further optimization scheme, the liquid inlet assembly includes an inlet pipeline 11, the liquid outlet end of the inlet pipeline 11 is communicated with the inner cavity of the middle part of the axial seal seat 34, and the liquid inlet end of the inlet pipeline 11 is sequentially communicated with the second pressure gauge 9, the second flowmeter 12 and the first valve 10.

[0117] The axial seal seat 34 is connected with the inlet pipeline 11, the first outlet pipeline 6 and the second outlet pipeline 17 through threads.

[0118] The working process of the application is as follows:

[0119] A kind of rotary machinery non-contact seal test device, mainly used to test the sealing performance of various spiral seals or labyrinth seals and other non-contact seals.

[0120] As shown in Figure 1 First, start the variable frequency motor driving the pump shaft 1, and make the pump shaft 1 work normally at the required test speed.

[0121] When the test device works, according to the test requirements, the liquid with certain pressure enters the cavity formed by the pump shaft 1, the axial seal seat 34, the radial seal left side sealing element 28 and the axial seal inner side sealing element 29 through the inlet pipeline 11.

[0122] The liquid with certain pressure flows into the sealing gap formed by the axial seal outer side sealing element 31 and the axial seal inner side sealing element 29 through threads or labyrinth grooves, and then flows out to the outlet cavity formed by the pump shaft 1, the axial seal seat 34 and the second mechanical seal suspension 35 after a certain length of sealing cooperation, and then flows out through the first outlet pipeline 6.

[0123] According to the test requirements, one or more test holes are arranged on the axial seal outer side sealing element 31 and the axial seal seat 34 at certain intervals, and the first pressure temperature sensor 8 is arranged in the test hole.

[0124] The pressure liquid flows into the gap between the left radial seal 28 and the right radial seal 13 from the right, and then flows out after a certain length of the sealing fit section, enters the outlet cavity formed by the pump shaft 1 and the first mechanical seal suspension 24, and then flows out through the second outlet pipeline 17. The pressure and flow of the liquid leaking out of the sealing fit section can be measured through the third pressure gauge 18 and the third flow meter 19 arranged on the second outlet pipeline 17. One or more test holes are arranged on the right radial seal 13 and the first mechanical seal suspension 24 at a certain radius according to the test requirements, and the second pressure and temperature sensor 16 is arranged in the test hole. The second pressure and temperature sensor 16 can measure the pressure and temperature of the liquid at the test point of the sealing fit, and the pressure drop and viscosity change at the test point can be calculated through the pressure and temperature.

[0125] By opening or closing the left outlet valve 3 and the second valve 21 on the first outlet pipeline 6 and the second outlet pipeline 17, the corresponding test section can be turned on or off, and the axial sealing or radial sealing performance test can be carried out separately or simultaneously. The sealing performance test at different rotating speeds can be realized through the variable frequency motor. The left radial seal 28 and the right radial seal 13, the outer axial seal 31 and the inner axial seal 29 can be replaced according to different thread or labyrinth seal parameters.

[0126] The beneficial effects of the present application are as follows:

[0127] 1. For spiral seal or labyrinth seal, axial sealing test can be carried out. The axial sealing section is arranged along the axial direction and includes an inner seal and an outer seal. The outer surface of the inner seal rotates with the shaft, and the inner surface of the outer seal is provided with a spiral groove or an annular sealing tooth to form a sealing combination. The outer seal is provided with a pressure and temperature measuring hole to measure the liquid pressure and temperature at different positions of the sealing surface. The inner and outer seals can be replaced with different inner diameters and different parameter spiral or labyrinth seal combinations according to test requirements.

[0128] 2. For spiral seal or labyrinth seal, radial sealing test can be carried out. The radial seal is arranged in the radial direction and includes a left radial seal and a right radial seal. The left radial seal rotates with the shaft. The left and right radial seal surfaces are respectively provided with annular sealing teeth to form a labyrinth seal combination. The right end seal is provided with a pressure and temperature measuring hole to measure the liquid pressure and temperature at different positions of the sealing surface. The left and right seals can be replaced with different sealing distances and different parameter labyrinth seal combinations according to test requirements.

[0129] 3. Liquid flows in from the middle inlet, and the liquid pressure can be provided by an external pressure pump according to the test requirements. The pressure liquid flows into the left cavity through the sealing gap of the axial sealing section to the left, and flows out through the left outlet pipeline, which is provided with a flow meter to measure the leakage of the axial sealing section under different inlet pressure conditions. The pressure liquid flows into the right cavity through the sealing gap of the radial sealing section to the right, and flows out through the right outlet pipeline, which is provided with a flow meter to measure the leakage of the radial sealing section under different inlet pressure conditions. The temperature measurement can obtain the change of the liquid temperature in the sealing surface at the measurement point, obtain the change of the sealing liquid viscosity, and further obtain the relationship between different sealing teeth or helical groove parameters and sealing performance.

[0130] 4. The test system can simultaneously perform axial sealing and radial sealing performance tests, and can also separately perform axial sealing and radial sealing performance tests by closing the left outlet valve or the right outlet valve.

[0131] 5. The specific matching form of the axial sealing and radial sealing matching surfaces of the test system can be changed, such as the gap sealing commonly used in centrifugal pumps.

[0132] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0133] The above-described embodiments are only descriptions of the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A rotary machine non-contact seal test device characterized by comprising: a rotary machine; a seal test device; and a seal test device attachment portion which is provided on the rotary machine and to which the seal test device is attached. Comprise: Axial seal seat (34); Axial seal test assembly, which is arranged in communication on one side of the axial seal seat (34); Radial seal test assembly, which is arranged in communication on the other side of the axial seal seat (34); Liquid inlet assembly, which is arranged in communication in the middle of the axial seal seat (34); Pump shaft (1), which traverses the middle of the axial seal seat (34), and which is in driving connection with the axial seal test assembly and the radial seal test assembly; The axial seal test assembly comprises an axial seal test part and an axial seal part arranged in sequence along the liquid flow direction, the axial seal test part is arranged inside the middle of the axial seal seat (34), and the axial seal part is sealingly arranged at the end of the axial seal seat (34); The axial seal test part and the axial seal part are in driving connection with the pump shaft (1); The liquid inlet end of the axial seal test part is in communication with the inside of the middle of the axial seal seat (34); A first liquid discharge assembly is arranged between the axial seal test part and the axial seal part, and the liquid outlet end of the axial seal test part is in communication with the liquid inlet end of the first liquid discharge assembly.

2. A non-contact seal test device for rotary machines according to claim 1, characterized in that: The axial seal test part comprises an axial seal outside sealing member (31), which is fixedly connected to the inside of the axial seal seat (34) through a positioning snap ring (32); The axial seal inside sealing member (29) is coaxially arranged inside the axial seal outside sealing member (31); An axial seal cavity is formed between the axial seal outside sealing member (31) and the axial seal inside sealing member (29), and an axial seal structure is arranged in the axial seal cavity; The liquid inlet end of the axial seal cavity is in communication with the liquid outlet end of the liquid inlet assembly; The liquid outlet end of the axial seal cavity is in communication with the liquid inlet end of the first liquid discharge assembly; The axial seal inside sealing member (29) is coaxially fixed to the middle of the pump shaft (1); The axial seal cavity is provided with an axial seal detection part.

3. A non-contact seal test device for rotary machines according to claim 2, characterized in that: The axial seal detection part comprises a plurality of first pressure and temperature sensors (8), the detection end of the first pressure and temperature sensor (8) extends into the axial seal cavity, and the fixed end of the first pressure and temperature sensor (8) is fixedly connected to the side wall of the axial seal seat (34).

4. A non-contact seal test device for rotary machines according to claim 2, characterized in that: The axial seal part comprises a second mechanical seal suspension (35), which is coaxially fixed to one end of the axial seal seat (34) and is coaxially arranged outside the pump shaft (1), and the second mechanical seal suspension (35) is in sealing cooperation with the pump shaft (1) through a second mechanical seal member (36); The pump shaft (1) passes through the middle of the second mechanical seal member (36), and the pump shaft (1) is in driving connection with the second mechanical seal member (36); The second mechanical seal suspension (35) is coaxially fixed with a second bearing bracket (37) on the side away from the axial seal seat (34), and the second bearing bracket (37) is in rotary connection with the pump shaft (1) through a second bearing (38); The first bearing end cover (2) is fixed to one end of the second bearing bracket (37) away from the axial seal seat (34), and the end of the pump shaft (1) penetrates the center of the first bearing end cover (2).

5. A non-contact seal test device for rotary machines according to claim 4, characterized in that: The first discharge assembly comprises a first outlet pipeline (6), the liquid inlet end of the first outlet pipeline (6) is in communication with the cavity formed by the second mechanical seal suspension (35), the axial seal seat (34), the positioning snap ring (32) and the pump shaft (1), and the liquid outlet end of the first outlet pipeline (6) is sequentially connected with a first pressure gauge (7), a first flowmeter (5) and a left outlet valve (3).

6. A non-contact seal test device for rotary machines according to claim 1, characterized in that: The radial seal test assembly comprises a radial seal test part and a radial seal part arranged in sequence along the liquid flow direction, the radial seal test part is arranged on the side of the axial seal seat (34) away from the liquid inlet assembly, and the liquid inlet end of the radial seal test part is in communication with the end of the axial seal seat (34); The liquid outlet end of the radial seal test part is in communication with the liquid inlet end of the second discharge assembly, the second discharge assembly is installed on the first mechanical seal suspension (24), the first mechanical seal suspension (24) is coaxially fixed to the end of the radial seal test part, and the middle part of the first mechanical seal suspension (24) is in sealing cooperation with the radial seal part; The pump shaft (1) is in transmission connection with the radial seal test part and the radial seal part.

7. A non-contact seal test device for rotary machines according to claim 6, characterized in that: The radial seal test part comprises a radial seal right side sealing element (13), the radial seal right side sealing element (13) is coaxially fixed to one side of the axial seal seat (34), and the first mechanical seal suspension (24) is coaxially fixed to the side of the radial seal right side sealing element (13) away from the axial seal seat (34); The radial seal left side sealing element (28) is rotationally connected to the side of the radial seal right side sealing element (13) away from the first mechanical seal suspension (24), the radial seal left side sealing element (28) is located in the axial seal seat (34), and a radial seal cavity is formed between the radial seal left side sealing element (28) and the axial seal seat (34); The liquid inlet end of the radial seal cavity is in communication with the liquid inlet end of the liquid inlet assembly; The liquid outlet end of the radial seal cavity is in communication with the liquid inlet end of the second discharge assembly; The radial seal cavity is provided with a radial seal structure; The radial seal cavity is provided with a radial seal detection part, and the radial seal detection part is installed on the first mechanical seal suspension (24); The radial seal detection part comprises a plurality of second pressure temperature sensors (16), the detection end of the second pressure temperature sensor (16) is located in the radial seal cavity, and the fixed end of the second pressure temperature sensor (16) is fixed to the first mechanical seal suspension (24); The radial seal left side sealing element (28) is coaxially fixed to the pump shaft (1).

8. A non-contact seal test device for rotary machines according to claim 6, characterized in that: The radial seal part comprises a first mechanical seal (20) which is sealingly matched on the side of the first mechanical seal suspension (24) away from the radial seal right side seal (13); the pump shaft (1) passes through the middle part of the first mechanical seal (20), the pump shaft (1) is drivingly connected with the first mechanical seal (20), the first mechanical seal suspension (24) is coaxially sleeved with a first bearing bracket (15) on the outside, the first bearing bracket (15) is fixedly connected with the end part of the axial seal seat (34) in a coaxial manner, the first bearing bracket (15) is rotatably connected with the end part of the pump shaft (1) through a first bearing (23), and the end part of the first bearing bracket (15) away from the axial seal seat (34) is fixedly connected with a second bearing end cover (22) in a coaxial manner.

9. A non-contact seal test device for rotary machines according to claim 8, characterized in that: The second liquid discharge assembly comprises a second outlet pipeline (17), the liquid inlet end of the second outlet pipeline (17) is communicated with the cavity surrounded by the radial seal right side seal (13), the first mechanical seal suspension (24), the first mechanical seal (20) and the pump shaft (1), and the liquid outlet end of the second outlet pipeline (17) is sequentially communicated with a third pressure gauge (18), a third flowmeter (19) and a second valve (21).

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