CN218067020U - Internal and external compatible single end face mechanical seal static pressure operation test bed - Google Patents

Abstract

The utility model relates to an interior external fitting compatible formula single-ended mechanical seal static pressure operation test bench, it belongs to check out test set technical field. The utility model comprises a frame, a flat plate, a high-pressure cooling tank, a bearing box, a transmission main shaft, a pressure cavity, a flange cover, a liquid receiving cavity, a motor, a mandrel, a replaceable shaft sleeve, a accompany-measuring static ring seat and a measured static ring seat, wherein the flat plate is fixed on the frame, the bearing box is arranged on the flat plate, the high-pressure cooling tank is arranged on the flat plate and is higher than the bearing box by a certain distance, the transmission main shaft is arranged in the bearing box, the pressure cavity is fixed on the bearing box, the flange cover is arranged on the pressure cavity, and the liquid receiving cavity is fixed on the flange cover; but alternate form axle sleeve coaxial arrangement is on the dabber, accompanies to survey quiet ring seat coaxial fixation on the bearing box, is surveyed quiet ring seat coaxial arrangement on the blind flange. The utility model has the advantages of reasonable design, main shaft operation precision is high, the test result is accurate reliable, the axial unbalance force is little, be suitable for and detect product wide range, operation maintenance convenience, satisfies the user demand.

Description

Internal and external compatible single end face mechanical seal static pressure operation test bed

Technical Field

The utility model relates to a mechanical seal static pressure operation test platform especially relates to an interior external application compatible formula single-end face mechanical seal static pressure operation test platform, and it belongs to check out test set technical field.

Background

The mechanical seal is called end face seal, is a shaft seal device of rotating machinery, mainly comprises a moving ring (rotating ring) and a static ring (static ring), is widely applied to equipment such as centrifugal pumps, centrifuges, reaction kettles, compressors and the like, and has the quality of the mechanical seal as a core part for preventing leakage, which greatly and directly influences the performance and the service life of the equipment. Therefore, the reliability of the mechanical seal is particularly important, and accordingly, the research on the mechanical seal detection technology is also significant.

The single-end face mechanical seal product is one of the most commonly used rotary shaft seal devices, and can be subdivided into an internal single-end face mechanical seal and an external mechanical seal according to different structural forms. The static pressure operation test of the mechanical seal is mainly carried out in the industry aiming at the mechanical seal product with a single end face so as to detect the leakage rate of the mechanical seal product under the static state and the rotating state respectively and judge whether the mechanical seal product is qualified or not according to the leakage rate.

The invention discloses a Chinese patent with publication number CN111238741A, namely 'a mechanical seal detection device and a flushing detection process' in the publication number of 2020, 06 and 05. This patent has designed the pump bracket to install the pump case and form the pressure chamber on the bracket, quiet ring is installed on the pump case, the rotating ring is installed on the pump shaft, through the analysis, this patent device exists following several aspects not enough: (1) Only one pair of mechanical seal products to be detected is arranged on the pump shaft, so that a large axial unbalance force can be generated to damage the detection device, and the detection device is particularly not suitable for detecting high-pressure mechanical seal products (the larger the pressure is, the larger the axial unbalance force is); (2) The end of a pump shaft for installing a mechanical seal product is suspended without any support, and the pump shaft is easy to generate larger radial circular runout when rotating at a high speed, so that the running precision is reduced, and even the reliability of a test result is reduced (the mechanical seal is leaked due to the large radial runout of the pump shaft, and the test result is misled); (3) The detection device is lack of a sealing liquid heating or cooling mechanism and cannot actively control the temperature of the sealing liquid; (4) The detection device has poor universality, can only be suitable for detecting conventional built-in single-end-face mechanical seal products, and is complex to operate and high in labor intensity because parts such as pump shafts, pump shells and the like which are adaptive need to be correspondingly replaced aiming at mechanical seal products with different sizes.

Therefore, according to the actual detection requirements of the mechanical seal industry, the mechanical seal detection device which has the advantages of small axial unbalance force, capability of bearing high-pressure test detection, small radial run-out of a main shaft, actively controllable temperature of sealing liquid, good universality and simplicity and convenience in operation is developed to serve as detection equipment for developing the static pressure running performance test of the mechanical seal, so that the technical level of the mechanical seal detection equipment is improved, the labor intensity of the mechanical seal detection test is reduced, and the standardization of the mechanical seal detection equipment in China is promoted, and the mechanical seal detection device is particularly necessary.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design reasonable, main shaft operation precision is high, the test result is accurate reliable, the axial unbalanced force is little, allowable pressure upper limit is high, the circulation temperature control effect is good, be suitable for the interior external application compatible formula single-end face mechanical seal static pressure operation test bench that is used for mechanical seal product detection that detects the product wide range, operation maintenance is convenient.

The utility model provides a technical scheme that above-mentioned problem adopted is: this interior external mounting compatible formula single-ended mechanical seal static pressure operation test bench, including frame, flat board, high-pressure cooling jar, bearing box, transmission main shaft, a pair of tapered roller bearing and antifriction bearing, the flat board is fixed in the frame, and the bearing box is installed on the flat board, and the high-pressure cooling jar passes through the support mounting on the flat board and be higher than the bearing box certain distance, and the transmission main shaft is installed in the bearing box through a pair of tapered roller bearing, its characterized in that: the device comprises a bearing box, a bearing cover, a liquid receiving cavity, a motor, a mandrel, a replaceable shaft sleeve, a static ring seat for accompanying measurement, a dynamic ring for accompanying measurement, a static ring seat to be measured and a dynamic ring to be measured, wherein the bearing box is fixedly provided with the pressure cavity; one end of a transmission main shaft is indirectly connected with a motor, the other end of the transmission main shaft is coaxially and fixedly connected with one end of a mandrel, the other end of the mandrel is supported on a flange cover or a liquid receiving cavity through a rolling bearing, a replaceable shaft sleeve is coaxially arranged on the mandrel, an accompanied measuring static ring seat is coaxially fixed on a bearing box, and an accompanied measuring moving ring is fixed on the mandrel; the measured static ring seat is coaxially arranged on the flange cover, and the measured moving ring is fixed on the replaceable shaft sleeve.

Preferably, the utility model discloses still include speed sensor, speed sensor installs on the flat board.

Preferably, the utility model discloses still include pressure sensor, pressure sensor fixed mounting is on the bearing box.

Preferably, the utility model discloses still include temperature sensor, temperature sensor fixed mounting is on the bearing box.

As preferred, the utility model discloses still include driven pulley, driving belt and drive pulley, transmission main shaft one end is passed through driven pulley, driving belt and is connected with the motor, and the transmission main shaft other end is passed through central taper hole cooperation location and is adopted the screw-fastening to carry out coaxial fixed connection with dabber one end.

As preferred, sealed liquid in high-pressure cooling tank and the pressure chamber feeds through each other through one advances two pipelines, and installs the cooling coil who carries out effective cooling to sealed liquid and carry out the sealed liquid heating device that effective heating heaied up to sealed liquid in the inside cavity of high-pressure cooling tank, still install on the high-pressure cooling tank in addition with jar internal portion cavity intercommunication air discharge valve, notes liquid valve, pressurization valve, flowing back valve.

As preferred, it has the bearing mounting hole to be used for the installation to support transmission main shaft to open on the bearing box, still open on the bearing box with pressure sensor installation interface, the temperature sensor installation interface of pressure chamber direct intercommunication, still open in addition on the bearing box with two pipeline interfaces of pressure chamber direct intercommunication and respectively through one advance two pipelines and one go out two pipelines and high-pressure cooling tank intercommunication.

Preferably, the utility model discloses still include the belt pulley safety cover, driven pulley, drive pulley's outside is provided with the belt pulley safety cover.

As preferred, the frame adopts steel integral welding frame or aluminum alloy ex-trusions frame.

As preferred, dull and stereotyped adoption casting steel plate, this dull and stereotyped upper surface processing annular escape canal groove, and the flat board is fixed in the frame.

As preferred, the motor adopts variable frequency speed motor, and this motor is installed on the inside motor mounting platform of frame.

Preferably, the pressure chamber includes built-in pressure chamber and adorns formula pressure chamber outward, and this built-in pressure chamber is used for testing built-in single-end face mechanical seal product, and this adorns formula pressure chamber outward and is used for testing and adorns formula single-end face mechanical seal product outward, and built-in pressure chamber is different with adorning formula pressure chamber axial length size outward.

Preferably, the blind flange includes built-in blind flange and adorns formula blind flange outward, and this built-in blind flange is used for testing built-in formula single-ended mechanical seal product, and this is adorned formula blind flange outward and is used for testing outer formula single-ended mechanical seal product, and built-in formula blind flange central processing has bearing installation through-hole, and outer formula blind flange center of adorning is ordinary circular through-hole.

Preferably, connect the sap cavity to connect the sap cavity and adorn the sap cavity outward including built-in formula, this built-in formula connects the sap cavity to be used for testing built-in formula single-ended mechanical seal product, and this is adorned the formula outward and is connect the sap cavity to test and adorn formula single-ended mechanical seal product outward, and the processing of dress formula connects the sap cavity center has the bearing installation through-hole, and built-in formula connects the sap cavity center to have no bearing installation hole.

Compared with the prior art, the utility model, have following advantage and effect: (1) One end of the mandrel is matched and positioned with the transmission main shaft through a central taper hole, the other end of the mandrel is supported on the flange cover or the liquid receiving cavity through a rolling bearing, and the 'simply supported beam' type stable supporting structure effectively reduces radial circular runout of the mandrel during high-speed operation and improves the integral operation precision of the transmission main shaft and the mandrel, so that the mechanical seal static pressure operation test bed has the advantages of high main shaft operation precision and accurate and reliable test results; (2) The spindle is simultaneously provided with a set of tested mechanical seal product and a set of tested mechanical seal product in opposite directions, so that the axial unbalance force on the transmission main shaft can be effectively counteracted, and the tapered roller bearing supporting the transmission main shaft can bear larger axial force, therefore, the mechanical seal static pressure operation test bed has the advantages of small axial unbalance force, high upper limit of allowable pressure and suitability for high-pressure mechanical seal product detection; (3) The pressure cavity and the sealing liquid in the high-pressure cooling tank are communicated with each other through a pipeline with one inlet and one outlet, a cooling coil (copper pipe) is arranged in a cavity in the high-pressure cooling tank, the sealing liquid can be effectively cooled based on a thermosiphon principle, and meanwhile, a sealing liquid heating device is also arranged on the high-pressure cooling tank, and the sealing liquid can be effectively heated and heated, so that the mechanical sealing static pressure operation test bed has the advantages of good circulating temperature control effect and capability of accurately controlling the temperature of the sealing liquid; (4) The mechanical seal static pressure operation test bench has the advantages that the mechanical seal static pressure operation test bench is good in equipment universality, wide in application range of detection products, convenient to operate and maintain and capable of effectively reducing labor intensity of detection tests, and the like.

Drawings

Fig. 1 is the utility model discloses mechanical seal static pressure operation test bench axle survey structure schematic diagram of embodiment.

Fig. 2 is a schematic sectional structural view of a mechanical seal static pressure operation test bed (installing a conventional built-in mechanical seal product) according to an embodiment of the present invention.

Fig. 3 is a schematic view of a partial cross-sectional structure of a bearing box and a pressure chamber of a mechanical seal static pressure operation test bed according to an embodiment of the present invention (a mechanical seal product mounted on an external device).

In the figure: the device comprises a frame 1, a flat plate 2, an internal liquid receiving cavity 3, an internal flange cover 4, an internal pressure cavity 5, a high-pressure cooling tank 6, a bearing box 7, a belt pulley protection cover 8, a rotating speed sensor 9, a pressure sensor 10, a temperature sensor 11, a driven belt pulley 12, a transmission belt 13, a driving belt pulley 14, a motor 15, a measured static ring seat 16, a measured dynamic ring 17, a replaceable shaft sleeve 18, a mandrel 19, an accompanying dynamic ring 20, an accompanying static ring seat 21, a transmission main shaft 22, a tapered roller bearing 23, a rolling bearing 24, an external pressure cavity 25, an external flange cover 26 and an external liquid receiving cavity 27.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present invention and are not intended to limit the present invention.

Example 1, referring to fig. 1 to 2, the internal single-end-face mechanical seal static pressure operation test bench of this embodiment includes a frame 1, a flat plate 2, an internal liquid receiving cavity 3, an internal flange cover 4, an internal pressure cavity 5, a high-pressure cooling tank 6, a bearing box 7, a pulley protection cover 8, a rotation speed sensor 9, a pressure sensor 10, a temperature sensor 11, a driven pulley 12, a driving belt 13, a driving pulley 14, a motor 15, a measured stationary ring seat 16 (with a measured stationary ring installed), a measured stationary ring 17, a replaceable shaft sleeve 18, a mandrel 19, an auxiliary measuring stationary ring 20, an auxiliary measuring stationary ring seat 21 (with an auxiliary measuring stationary ring installed), a driving spindle 22, a tapered roller bearing 23, a rolling bearing 24, and various auxiliary components such as valves, pipelines, seals, and fasteners.

The frame 1 in the embodiment is preferably a section steel integral welding frame or an aluminum alloy section frame, a foot seat is arranged at the bottom of the frame 1, a guard plate is arranged around the frame 1, and a motor mounting platform is arranged inside the frame 1.

Dull and stereotyped 2 in this embodiment adopts the casting steel plate, and dull and stereotyped 2 upper surface processes annular escape canal, and dull and stereotyped 2 fixed mounting is in frame 1.

The motor 15 in this embodiment is preferably a variable frequency speed regulating motor, and is mounted on a motor mounting platform inside the rack 1.

The bearing box 7 in this embodiment is fixedly installed on the flat plate 2, a bearing installation through hole is respectively formed in each of the left end face and the right end face of the bearing box 7 and used for installing and supporting the transmission main shaft 22, three threaded interfaces directly communicated with the pressure cavity are further formed in the bearing box 7, the pressure sensor 10, the temperature sensor 11 and the liquid discharge valve are respectively installed on the three threaded interfaces, the sealing liquid circulation liquid inlet threaded interface and the pressure cavity sealing liquid circulation liquid outlet threaded interface are further formed in the bearing box 7 and are directly communicated with the pressure cavity, and the bearing box 7 is respectively communicated with the high-pressure cooling tank 6 through pipelines.

In this embodiment, the high-pressure cooling tank 6 is fixedly mounted on the flat plate 2 through a support and is higher than the bearing box 7 by a certain distance (so as to facilitate thermal circulation based on the thermosiphon principle), a cooling coil (preferably a copper pipe) is mounted in the cavity inside the high-pressure cooling tank 6, a cooling coil water inlet threaded connector and a cooling coil water outlet threaded connector which are respectively communicated with two ends of the internal cooling coil are formed on the high-pressure cooling tank 6, a sealing liquid circulation liquid inlet threaded connector communicated with the cavity inside the tank body and a sealing liquid circulation liquid outlet threaded connector are further formed on the high-pressure cooling tank 6 and are respectively communicated with corresponding connectors on the bearing box 7 through pipelines, a heating device threaded connector communicated with the cavity inside the tank body and is provided with a sealing liquid heating device (preferably a resistive heating pipe), an exhaust threaded connector communicated with the cavity inside the tank body and is provided with an exhaust valve, a liquid injection threaded connector communicated with the cavity inside the tank body and is provided with a liquid injection valve, a pressurization threaded connector communicated with the cavity inside the tank body and is provided with a pressurization valve, a liquid drainage threaded connector communicated with the cavity inside the tank body and is provided with a liquid level observation window, and the high-pressure cooling tank 6 is provided with a liquid observation window.

The built-in pressure chamber 5 in this embodiment is fixedly mounted on the bearing housing 7 such that the built-in pressure chamber 5 remains coaxial with the bearing mounting hole of the bearing housing 7.

The built-in type flange cover 4 in this embodiment is fixedly installed on the built-in type pressure chamber 5 and keeps the built-in type flange cover 4 coaxial with the built-in type pressure chamber 5, and a bearing installation through hole is processed in the center of the built-in type flange cover 4 for installing the rolling bearing 24, and a through hole is processed on the built-in type flange cover 4 so that the leakage sealing liquid can flow out to the built-in type liquid receiving chamber 3 through the through hole.

Built-in type in this embodiment connects liquid chamber 3 fixed mounting on built-in type blind flange 4 and makes built-in type connect liquid chamber 3 to keep coaxial with built-in type blind flange 4, and built-in type connects 3 center bearingless mounting holes in liquid chamber, and built-in type connects liquid chamber 3 to process has the sealant to reveal observation window, and built-in type connects 3 bottoms in liquid chamber to open to have the through-hole so that reveal sealant flows out to the measuring tool in.

The transmission main shaft 22 in this embodiment is installed in the bearing box 7 through a pair of tapered roller bearings 23, one end of the transmission main shaft 22 is connected with the motor 15 through the driven pulley 12, the driving pulley 14 and the transmission belt 13, the other end of the transmission main shaft 22 is matched and positioned with one end of the mandrel 19 through a central taper hole and is coaxially and fixedly connected with the mandrel 19 through screw fastening, and the other end of the mandrel 19 is supported on the built-in flange cover 4 through a rolling bearing 24.

In this embodiment, the replaceable shaft sleeve 18 is coaxially and fixedly mounted on the core shaft 19, and the replaceable shaft sleeve 18 adopts a shaft sleeve with corresponding outer diameter and length according to the specification and size of the mechanical seal product to be tested.

The quiet ring seat of accompanying survey 21 (installing the quiet ring of accompanying survey) of this embodiment coaxial fixed mounting is on bearing box 7, accompanies to survey rotating ring 20 fixed mounting and form a pair of dynamic seal with the quiet ring cooperation of accompanying survey on dabber 19.

The measured static ring seat 16 (provided with the measured static ring) in the embodiment is coaxially and fixedly arranged on the built-in flange cover 4, and the measured dynamic ring 17 is fixedly arranged on the replaceable shaft sleeve 18 and is matched with the measured static ring to form a pair of dynamic seals.

In the embodiment, sealing elements are additionally arranged during fixed installation between the built-in pressure cavity 5 and the bearing box 7, between the built-in flange cover 4 and the built-in pressure cavity 5, between the built-in liquid receiving cavity 3 and the built-in flange cover 4, between the tested static ring seat 21 and the bearing box 7, and between the tested static ring seat 16 and the built-in flange cover 4, and the sealing elements are O-shaped sealing rings.

The rotation speed sensor 9 in this embodiment is fixedly mounted on the plate 2 for measuring the rotation speed of the transmission main shaft 22.

The pressure sensor 10 in this embodiment is fixedly mounted on the bearing housing 7 for measuring the sealing hydraulic pressure in the pressure chamber.

The temperature sensor 11 in this embodiment is fixedly installed on the bearing housing 7, and is used for measuring the temperature of the sealing liquid in the pressure chamber.

The working principle and the working process of the experiment of the embodiment 1 are as follows: the inner wall of the built-in pressure cavity 5, the end surface of the bearing box 7, a tested static ring seat 21 (provided with a tested static ring), a tested dynamic ring 20, a built-in flange cover 4, a tested static ring seat 16 (provided with a tested static ring), a tested dynamic ring 17 and the like jointly form a sealed pressure cavity, meanwhile, the sealed pressure cavity is communicated with the inside of the high-pressure cooling tank 6 through a sealing liquid circulating liquid inlet threaded interface, a sealing liquid circulating liquid outlet threaded interface and corresponding pipelines on the bearing box 7, a thermosiphon effect can be generated between the high-pressure cooling tank 6 and the built-in pressure cavity 5, so that sealing liquid in the built-in pressure cavity 5 can automatically carry out circulating heat exchange, sealing liquid can be injected into the built-in pressure cavity 5 by controlling a liquid injection valve on the high-pressure cooling tank 6, the sealing liquid pressure in the built-in pressure cavity 5 can be accurately controlled by controlling a pressurizing valve on the high-pressure cooling tank 6, and the internal sealing liquid temperature of the built-in pressure cavity 5 can be accurately controlled by controlling a sealing liquid heating device and cooling flow water on the high-pressure cooling tank 6; when the device works, sealing liquid is filled into the built-in pressure cavity 5 by controlling the liquid injection valve and the exhaust valve, the motor 15 drives the transmission main shaft 22 and the mandrel 19 to rotate, the measured movable ring 17 rotates along with the mandrel 19 and forms a pair of measured dynamic seals with the measured static ring, and during the period, the pressure of the sealing liquid in the built-in pressure cavity 5 is accurately controlled by controlling the pressure valve, and meanwhile, the temperature of the sealing liquid in the built-in pressure cavity 5 is accurately controlled by controlling the cooling water of the sealing liquid heating device and the cooling coil; the tested mechanical seal product is positioned in the seal pressure cavity and is used as one dynamic seal link, if the tested mechanical seal product leaks, sealing liquid seeps out and flows into the built-in liquid receiving cavity 3 through the built-in flange cover 4, and therefore whether the tested mechanical seal product is qualified or not can be judged according to product standards by observing whether the sealing liquid seeps out from the built-in liquid receiving cavity 3 and weighing and metering or volume metering the sealing liquid; and the static pressure operation detection test of each product can be realized only by replacing the replaceable shaft sleeve 18 facing the built-in single-end-face mechanical seal products with different specifications and sizes.

Embodiment 2, mainly referring to fig. 3 (partially see fig. 1 and fig. 2), the externally-mounted single-end-face mechanical seal static pressure operation test bed of this embodiment includes a frame 1, a flat plate 2, an externally-mounted pressure chamber 25, an externally-mounted flange cover 26, an externally-mounted liquid receiving chamber 27, a high-pressure cooling tank 6, a bearing box 7, a pulley protection cover 8, a rotation speed sensor 9, a pressure sensor 10, a temperature sensor 11, a driven pulley 12, a driving belt 13, a driving pulley 14, a motor 15, a measured stationary ring seat 16 (with a measured stationary ring installed), a measured stationary ring 17, a replaceable shaft sleeve 18, a mandrel 19, an auxiliary measuring movable ring 20, an auxiliary measuring stationary ring seat 21 (with an auxiliary measuring stationary ring installed), a driving spindle 22, a tapered roller bearing 23, a rolling bearing 24, and various auxiliary components such as valves, pipelines, sealing elements, and fastening elements.

The externally-mounted pressure chamber 25 in this embodiment is fixedly mounted on the bearing housing 7 such that the externally-mounted pressure chamber 25 remains coaxial with the bearing mounting hole of the bearing housing 7, and the externally-mounted pressure chamber 25 differs from the internally-mounted pressure chamber 5 only in the axial length dimension.

The externally-mounted flange cover 26 in this embodiment is fixedly mounted on the externally-mounted pressure chamber 25 such that the externally-mounted flange cover 26 is held coaxially with the externally-mounted pressure chamber 25, a generally circular through hole is formed in the center of the externally-mounted flange cover 26, and a through hole is formed in the externally-mounted flange cover 26 such that the leakage sealing liquid can flow out into the externally-mounted liquid receiving chamber 27 through the through hole.

The external liquid receiving chamber 27 in this embodiment is fixedly mounted on the external flange cover 26 so that the external liquid receiving chamber 27 is kept coaxial with the external flange cover 26, a bearing mounting through hole is formed in the center of the external liquid receiving chamber 27 for mounting the rolling bearing 24, a sealing liquid leakage observation window is formed in the external liquid receiving chamber 27, and a through hole is formed in the lowest portion of the bottom of the external liquid receiving chamber 27 so that leakage sealing liquid can flow out to the measuring tool.

The transmission main shaft 22 in this embodiment is installed in the bearing box 7 through a pair of tapered roller bearings 23, one end of the transmission main shaft 22 is connected with the motor 15 through the driven pulley 12, the driving pulley 14 and the transmission belt 13, the other end of the transmission main shaft 22 is matched and positioned with one end of the mandrel 19 through a central taper hole and is coaxially and fixedly connected through screw fastening, and the other end of the mandrel 19 is supported on the external liquid receiving cavity 27 through a rolling bearing 24.

The measured stationary ring seat 16 (with the measured stationary ring) in this embodiment is coaxially and fixedly mounted on the external flange cover 26, and the measured moving ring 17 is fixedly mounted on the replaceable shaft sleeve 18 and forms a pair of dynamic seals in cooperation with the measured stationary ring.

In the present embodiment, a sealing member (preferably, an O-ring) is attached to each of the external pressure chamber 25 and the bearing housing 7, the external flange cover 26 and the external pressure chamber 25, the external liquid receiving chamber 27 and the external flange cover 26, the auxiliary stationary ring mount 21 and the bearing housing 7, and the stationary ring mount 16 and the external flange cover 26.

The rest of the structure of this embodiment 2 is the same as that of embodiment 1, and is not described again.

The working principle and the working process of the experiment of the embodiment 2 are as follows: the inner wall of the externally-mounted pressure cavity 25, the end face of the bearing box 7, the tested static ring seat 21 (provided with the tested static ring), the tested moving ring 20, the externally-mounted flange cover 26, the tested static ring seat 16 (provided with the tested static ring), the tested moving ring 17 and the like jointly form a sealed pressure cavity, meanwhile, the sealed pressure cavity is communicated with the inside of the high-pressure cooling tank 6 through a sealing liquid circulating liquid inlet threaded interface, a sealing liquid circulating liquid outlet threaded interface and corresponding pipelines on the bearing box 7, a thermosiphon effect can be generated between the high-pressure cooling tank 6 and the externally-mounted pressure cavity 25, so that sealing liquid in the externally-mounted pressure cavity 25 can automatically carry out circulating heat exchange, sealing liquid can be injected into the externally-mounted pressure cavity 25 by controlling a liquid injection valve on the high-pressure cooling tank 6, the sealing liquid pressure in the externally-mounted pressure cavity 25 can be accurately controlled by controlling a pressure valve on the high-pressure cooling tank 6, and the sealing liquid temperature in the externally-mounted pressure cavity 25 can be accurately controlled by controlling a sealing liquid heating device and cooling liquid temperature cooling flow water on the high-pressure cooling tank 6 and a cooling coil; when the pressure-measuring device works, sealing liquid is filled into the external pressure cavity 25 by controlling the liquid injection valve and the exhaust valve, the motor 15 drives the transmission main shaft 22 and the mandrel 19 to rotate, the measured movable ring 17 rotates along with the mandrel 19 and forms a pair of measured dynamic seals with the measured static ring, and during the period, the pressure of the sealing liquid in the external pressure cavity 25 is accurately controlled by controlling the pressure valve, and meanwhile, the temperature of the sealing liquid in the external pressure cavity 25 is accurately controlled by controlling the cooling running water of the sealing liquid heating device and the cooling coil; the tested mechanical seal product is positioned in the seal pressure cavity and serves as one dynamic seal link, if the tested mechanical seal product leaks, sealing liquid seeps out and flows into the externally-mounted liquid receiving cavity 27 through the externally-mounted flange cover 26, and therefore whether the tested mechanical seal product is qualified or not can be judged according to product standards by observing whether the sealing liquid seeps out from the externally-mounted liquid receiving cavity 27 and weighing and metering or volume metering the sealing liquid; and the static pressure operation detection test of each product can be realized only by replacing the replaceable shaft sleeve 18 facing the external single-end-face mechanical seal products with different specifications and sizes.

In this embodiment 1 and embodiment 2, one end of the mandrel 19 of the mechanical seal static pressure operation test bed is positioned in cooperation with the transmission main shaft 22 through a central taper hole, and the other end of the mandrel 19 is supported on the built-in flange cover 4 or the built-in liquid receiving cavity 27 through the rolling bearing 24, so that the 'simple beam' type stable support structure effectively reduces radial circular runout of the mandrel 19 during high-speed operation, and improves the overall operation precision of the transmission main shaft 22 and the mandrel 19, and therefore, the mechanical seal static pressure operation test bed has the advantages of high main shaft operation precision, accurate and reliable test results and the like.

A set of mechanical seal product to be tested and a set of mechanical seal product to be tested are simultaneously installed on the mandrel 19 of the mechanical seal static pressure operation test bed in the embodiment 1 and the embodiment 2 in an opposite direction, so that axial unbalance force on the transmission main shaft 22 can be effectively counteracted, and the tapered roller bearing 23 supporting the transmission main shaft 22 can bear larger axial force, so that the mechanical seal static pressure operation test bed has the advantages of small axial unbalance force, high upper allowable pressure limit, applicability to high-pressure mechanical seal product detection and the like.

This embodiment 1, the sealed liquid in the pressure chamber (built-in pressure chamber 5 or the external dress formula pressure chamber 25) of the mechanical seal static pressure operation test bench in the embodiment 2 and the high pressure cooling jar 6 feeds through each other through one advances two pipelines of one play, and install cooling coil (copper pipe) in the 6 inside cavities of high pressure cooling jar and can carry out effective cooling to sealed liquid based on the thermosiphon principle, still install sealed liquid heating device on the high pressure cooling jar 6 simultaneously and can carry out effective heating intensification to sealed liquid, consequently, it is effectual to have circulation control by temperature change, but advantages such as accurate control sealed liquid temperature.

In this embodiment 1 and embodiment 2, the mechanical seal static pressure operation test bed can realize the static pressure operation test of the mechanical seal product only by replacing the replaceable shaft sleeve 18 when testing the single-end-face mechanical seal products of the same type (all built-in type or all external type) and different sizes, and can realize the static pressure operation test of the mechanical seal product only by replacing the corresponding pressure chamber (built-in pressure chamber 5 or external type pressure chamber 25), flange cover (built-in flange cover 4 or external type flange cover 26) and liquid receiving chamber (built-in liquid receiving chamber 3 or external type liquid receiving chamber 27) when testing the single-end-face mechanical seal products of different types (either built-in type or external type), and all the pipelines and sensors communicated with the pressure chamber (built-in pressure chamber 5 or external type pressure chamber 25) are installed on the bearing box 7, so that the pressure chamber does not need to repeatedly disassemble and assemble the pipelines and sensors when replacing the parts, and other parts, and therefore, the mechanical seal static pressure operation test bed has the advantages of being good in equipment universality, wide application range of the test products, convenient operation and maintenance, and effective reduction of the labor intensity of the test.

In conclusion, the mechanical seal static pressure operation test bed in the embodiments 1 and 2 has the advantages of small axial unbalance force, capability of bearing high-pressure test detection, small radial runout of the main shaft, actively controllable temperature of the sealing liquid, good universality, simplicity and convenience in operation and the like, is very suitable for serving as standard detection equipment for developing the mechanical seal static pressure operation performance test, and can effectively improve the technical level of the mechanical seal detection equipment, reduce the labor intensity of the mechanical seal detection test and promote the standardization of the mechanical seal detection equipment in China.

And will be apparent to those skilled in the art from the foregoing description.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the foundation the utility model discloses an all include in the protection scope of the utility model discloses an equivalent change or simple change that structure, characteristic and principle do. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides an interior external arrangement compatible formula single-end face mechanical seal static pressure operation test bench, includes frame (1), flat board (2), high-pressure cooling tank (6), bearing box (7) and transmission main shaft (22), flat board (2) are fixed on frame (1), and install on flat board (2) bearing box (7), and high-pressure cooling tank (6) are passed through the support mounting and are higher than bearing box (7) certain distance on flat board (2), and install in bearing box (7) transmission main shaft (22), its characterized in that: the device is characterized by further comprising a pressure cavity, a flange cover, a liquid receiving cavity, a motor (15), a mandrel (19), a replaceable shaft sleeve (18), a measuring accompanying static ring seat (21), a measuring accompanying dynamic ring (20), a measured static ring seat (16) and a measured dynamic ring (17), wherein the pressure cavity is fixed on the bearing box (7), the flange cover is installed on the pressure cavity, and the liquid receiving cavity is fixed on the flange cover; one end of a transmission main shaft (22) is indirectly connected with the motor (15), the other end of the transmission main shaft (22) is coaxially and fixedly connected with one end of a mandrel (19), and the other end of the mandrel (19) is supported on a flange cover or a liquid receiving cavity; the replaceable shaft sleeve (18) is coaxially arranged on the mandrel (19); the accompany-measuring static ring seat (21) is coaxially fixed on the bearing box (7), and the accompany-measuring moving ring (20) is fixed on the mandrel (19); the measured static ring seat (16) is coaxially arranged on the flange cover, and the measured moving ring (17) is fixed on the replaceable shaft sleeve (18).

2. The internal and external compatible single-end-face mechanical seal static pressure operation test stand according to claim 1, characterized in that: still include driven pulley (12), drive belt (13) and drive pulley (14), drive spindle (22) one end is passed through driven pulley (12), drive pulley (14) and drive belt (13) and is connected with motor (15), and the drive spindle (22) other end is passed through central taper hole cooperation location and is adopted the screw fastening to carry out coaxial fixed connection with dabber (19) one end.

3. The internal and external compatible single-end-face mechanical seal static pressure operation test stand according to claim 1, characterized in that: the device is characterized by further comprising a rotating speed sensor (9), wherein the rotating speed sensor (9) is installed on the flat plate (2).

4. The internal and external compatible single-end-face mechanical seal static pressure operation test bed according to claim 1, characterized in that: the bearing box is characterized by further comprising a pressure sensor (10), wherein the pressure sensor (10) is fixedly installed on the bearing box (7).

5. The internal and external compatible single-end-face mechanical seal static pressure operation test stand according to claim 1, characterized in that: the bearing box is characterized by further comprising a temperature sensor (11), wherein the temperature sensor (11) is fixedly installed on the bearing box (7).

6. The internal and external compatible single-end-face mechanical seal static pressure operation test stand according to claim 1, characterized in that: the high-pressure cooling tank (6) is communicated with the sealing liquid in the pressure cavity through a pipeline with one inlet and one outlet, and a cooling coil and a sealing liquid heating device are installed in the cavity inside the high-pressure cooling tank (6).

7. The internal and external compatible single-end-face mechanical seal static pressure operation test bed according to claim 1, characterized in that: the bearing box (7) is provided with a bearing mounting hole for mounting and supporting a transmission main shaft (22), the bearing box (7) is also provided with a pressure sensor mounting interface and a temperature sensor mounting interface which are directly communicated with a pressure cavity, and the bearing box (7) is also provided with two pipeline interfaces which are directly communicated with the pressure cavity and are respectively communicated with a high-pressure cooling tank (6) through one inlet pipeline and one outlet pipeline.

8. The internal and external compatible single-end-face mechanical seal static pressure operation test bed according to claim 1, characterized in that: the frame (1) adopts a steel integral welding frame or an aluminum alloy section frame.

9. The internal and external compatible single-end-face mechanical seal static pressure operation test stand according to claim 1, characterized in that: dull and stereotyped (2) adopt the casting steel plate, this dull and stereotyped (2) upper surface processing annular escape canal groove, and dull and stereotyped (2) are fixed in frame (1).

10. The internal and external compatible single-end-face mechanical seal static pressure operation test bed according to claim 1, characterized in that: the motor (15) adopts a variable frequency speed regulating motor, and the motor (15) is arranged on a motor mounting platform in the rack (1).

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