CN204128757U - Testing arrangement of reciprocating type bearing seal sealing performance - Google Patents

Abstract

The utility model discloses a testing device for the sealing performance of a reciprocating shaft seal, comprising a test bench, an outer cylinder, a sealing ring mounting ring for mounting a sealing ring, a sealing main shaft, a tension and compression sensor, a support block, a reciprocating linear motion device, an auxiliary device and a detection device, wherein the outer cylinder is fixed on the test bench through a bracket, and the detection device and the auxiliary device are respectively connected with holes arranged on the outer cylinder; the sealing ring mounting ring is mounted in the outer cylinder, and the two ends of the outer cylinder compress and seal the sealing ring mounting ring through end covers; the sealing main shaft is mounted in the outer cylinder and connected with the tension and compression sensor through a coupling; the tension and compression sensor is connected with the support block, and the support block is connected with the reciprocating linear motion device; the reciprocating linear motion device, the tension and compression sensor and the auxiliary device are all electrically connected with a data acquisition control device.

Description

A test device for sealing performance of reciprocating shaft seal

technical field

The utility model relates to a testing device for the sealing performance of a reciprocating shaft seal, which belongs to the field of fluid sealing technology research.

Background technique

Sealing technology has become an essential technology to ensure the long-term, safe and stable operation of modern industry. Generally speaking, seals can be divided into two categories: static seals between relatively static joints and dynamic seals between relatively moving joints. Reciprocating shaft seals are typical dynamic seals, widely used in internal combustion engines, hydraulic or pneumatic cylinders; reciprocating plunger pumps and compressors widely used in oil refining and petrochemical equipment use various piston seals and piston rod seals. The leakage of the sealing medium of the reciprocating shaft seal will not only cause huge economic losses, but also cause serious consequences such as environmental pollution, efficiency decline, and personal injury. Therefore, its sealing performance plays an important role in the normal operation of the equipment and cost savings. important role.

At present, the testing of the sealing performance of reciprocating shaft seals in engineering is often lagging, and there is a lack of testing and testing equipment that can effectively test seals and sealing systems, and the existing testing equipment is not very specific.

Contents of the invention

In order to overcome the shortcomings of the existing testing equipment for the sealing performance of reciprocating shaft seals such as hysteresis and lack of pertinence, the utility model provides a kind of reciprocating shaft seal that can conveniently detect various typical reciprocating shaft seals such as hydraulic seals and pneumatic seals. Test the sealing performance under different medium and medium pressure, simulate the sealing performance test device of the reciprocating shaft seal which is similar to the actual working state of the shaft seal, with high test accuracy, accurate and reliable test results, good repeatability and high degree of automation .

The technical scheme that the utility model adopts is:

A test device for sealing performance of a reciprocating shaft seal, characterized in that it includes a test bench, an outer cylinder, a sealing ring installation ring for installing a sealing ring, a sealing spindle, a tension and pressure sensor, a supporting block, a reciprocating linear motion device, and an auxiliary device As well as a detection device, the outer cylinder is fixed on the test bench through a bracket, and the detection device and the auxiliary device are respectively connected to the holes arranged on the outer cylinder; the The sealing ring installation ring is installed in the outer cylinder, and the two ends of the outer cylinder press and seal the sealing ring installation ring through the end cap; the sealing main shaft is installed in the outer cylinder and It is connected with the tension-pressure sensor through a coupling; the tension-pressure sensor is connected with the support block, and the support block is connected with the reciprocating linear motion device; the reciprocating linear motion device , tension and pressure sensors and auxiliary devices are all electrically connected with the data acquisition control device.

Further, an annular drainage groove is opened on the outer cylinder close to the sealing ring installation ring; the first openings for the leakage of the liquid medium to flow out are respectively opened on the left and right sides of the bottom of the outer cylinder, and the upper and lower sides of the outer cylinder are opposite to each other. The positions are respectively provided with second openings for connecting the auxiliary devices. In this way, the leaked medium can smoothly flow into the drainage groove, and collect into the first opening at the bottom of the outer cylinder, and then lead out through the through groove on the end cover, ensuring that all the leaked medium can be smoothly collected to the leak detection device , to ensure the accuracy of the measurement.

Further, when used for the hydraulic sealing test, the auxiliary device includes a liquid conduit, a circulation pump, a liquid storage tank and a compressor, one end of the liquid conduit communicates with the second opening on the outer cylinder, and the other end communicates with the circulation The pump is connected, the circulation pump is connected to the bottom of the liquid storage tank, the top of the liquid storage tank is connected to the compressor, and the upper part of the liquid storage tank communicates with the second opening on the outer cylinder opposite to the position where the liquid conduit is set; the detection device It includes a catheter and a leakage liquid measuring cup, one end of the catheter is inserted into the leakage liquid measuring cup, and the other end communicates with the first opening on the outer cylinder.

Further, when used for a pneumatic sealing test, the detection device includes a suction gun, an air guide tube and a helium mass spectrometer leak detector, one end of the air guide tube is connected to the helium mass spectrometer leak detector, and the other end is connected to the helium mass spectrometer leak detector on the outer cylinder. The first opening is connected; the auxiliary device includes a gas conduit, a pressure regulator and a helium cylinder, the suction gun is arranged at the opening end of the helium cylinder, and one end of the gas conduit is connected to the outer The second opening on the cylinder communicates, and the other end is connected to the pressure regulator, and the pressure regulator is connected to the suction gun; the second opening on the outer cylinder opposite to the other end of the gas conduit Sealed with a nut.

Further, the reciprocating linear motion device includes a rotary motor and a crank linkage mechanism, the rotary motor is fixed on the test bench, and the rotary shaft of the rotary motor is connected to the crank linkage mechanism. One end is connected, and the other end of the crank linkage mechanism is connected to the bracket.

Further, the end cover is fixed on the outer cylinder by the first bolt, and the top end of the end cover is provided with through grooves at intervals to ensure that the leaking medium can be smoothly collected into the leak detection device.

Further, the sealing ring installation ring is provided with a groove for installing the sealing ring, and an O-shaped rubber sealing ring is installed between the sealing ring installation ring and the outer cylinder to prevent medium leakage. The installation of the O-shaped rubber sealing ring can prevent the medium from leaking from this place and ensure the accuracy of the test results. The form of the groove on the sealing ring installation ring is variable, and different forms of reciprocating shaft seals can be installed. In this way, it is possible to test the sealing performance of various typical reciprocating shaft seals of hydraulic seals and pneumatic seals.

Further, the bracket is installed on the test bench through the bracket bracket, the bracket bracket is provided with a slide rail, and the bracket can move along the slide rail; the The supporting block is connected with the tension and pressure sensor through the second bolt.

Further, both ends of the coupling are threadedly connected to the sealed main shaft and the tension-pressure sensor respectively, and lock nuts are arranged between the coupling, the sealed main shaft and the tension-pressure sensor. In this way, the connection between the parts can be ensured firmly, the accuracy of the transmission of the system can be ensured, and the sealed main shaft can reciprocate according to the predetermined displacement amplitude.

A method for testing the sealing performance of a reciprocating shaft seal using the above-mentioned testing device, said method comprising the following steps:

a. Install the sealing ring on the sealing ring installation ring with a groove. The sealing ring installation ring is installed in the outer cylinder and compressed by the end caps at both ends of the outer cylinder; install the sealing main shaft in the outer cylinder and connect it through the coupling The sealing spindle is connected to the tension and pressure sensor, and the tension and pressure sensor is connected to the support block; the support block moves along the slide rail on the support block bracket, and the power is provided by the horizontal reciprocating motion device;

b. The data acquisition control device controls the auxiliary device and the reciprocating horizontal motion device, so that the space between the two shaft seals is filled with the test medium with pressure and the seal spindle completes the set reciprocating linear motion;

c. The tension and pressure sensor collects the friction data of the shaft seal in real time and transmits it to the data acquisition control device; the leak detection device detects the leakage of the test medium during the operation of the reciprocating shaft seal to obtain the sealing performance of the reciprocating shaft seal.

Using method of the present utility model and working process thereof are as follows:

Install the sealing ring on the sealing ring installation ring with a groove, and install the sealing ring installation ring into the outer cylinder; then install the sealing main shaft, and press the sealing ring installation ring with the end covers at both ends; connect the right side of the sealing main shaft in sequence Couplings, tension and pressure sensors and brackets, the brackets are connected to the horizontal reciprocating device; then, install the auxiliary device and leak detection device to the corresponding position; the tension and pressure sensors, auxiliary devices and reciprocating horizontal motion The acquisition and control device is electrically connected; after that, the data acquisition and control device controls the horizontal reciprocating device and the auxiliary device, so that the shaft seal is filled with the sealing medium with preset pressure, and the sealing main shaft reciprocates according to the set main shaft; during the test, The tension and pressure sensor can collect the friction force of the shaft seal synchronously and output it to the data acquisition control device, and the leak detection device detects the leakage of the medium during the test.

The auxiliary device can realize the sealing performance test of hydraulic seal and pneumatic seal; the change of groove form can test various typical reciprocating shaft seals; the leak detection device has different devices for hydraulic seal and pneumatic seal, which can accurately measure The leakage of the medium; the test results are accurate and reliable, and the repeatability is good.

Compared with the prior art, the beneficial effects of the utility model are:

1. The form of the groove in the utility model is variable, and various typical shaft seals of hydraulic seal and pneumatic seal can be tested; the pressure and type of the test medium can be adjusted, so that the shaft seal can be more accurately simulated in different operating environments sealing performance.

2. During the test, the data acquisition and control device controls the reciprocating displacement of the sealing shaft, reads relevant data such as friction, and detects the leakage of the medium; the operation is simple and convenient, the degree of automation is high, the human error of the test is small, and the result is accurate ,reliable.

3. For hydraulic seals and pneumatic seals, different forms of leakage measurement devices and measurement methods are used, so that the leakage of various media can be accurately measured in a targeted manner.

4. The utility model can test the sealing performance of different forms of shaft seals, and can conveniently control the reciprocating displacement of the sealing main shaft, and accurately measure the axial force during the operation of the shaft seal; the auxiliary device can control the pressure of the sealing medium and Type, the leak detection device can accurately detect the leakage during the operation of the shaft seal; the test is highly automated, the results are accurate and reliable, and the repeatability is good.

Description of drawings

Fig. 1a is a schematic diagram of the front view of the hydraulic sealing test device in Example 1 of the present utility model.

Figure 1b is an enlarged view of I in Figure 1a.

Figure 1c is an enlarged view of II in Figure 1a.

Fig. 2 is a schematic diagram of the front view of the pneumatic sealing test device according to the second embodiment of the utility model.

Figure 3a, Figure 3b, Figure 3c, and Figure 3d are structural schematic diagrams of typical combined seals for hydraulic seals.

Fig. 4a, Fig. 4b, Fig. 4c and Fig. 4d are schematic structural diagrams of typical elastomeric pneumatic piston seals.

Fig. 5a is a schematic structural view of the end cap of the embodiment of the present invention.

Figure 5b is a side view of Figure 5a.

Fig. 6 is a schematic diagram of cooperation between the bracket and the slide rail of the present invention.

Detailed ways

Example 1

Referring to Figures 1a, 1b, 1c, Figures 3a to 3d, and Figures 5a to 6, a test device for the sealing performance of a reciprocating shaft seal, including a test bench 1, an outer cylinder 8, and a sealing ring installation for installing a sealing ring 9 Ring 5, sealed main shaft 7, tension and pressure sensor 14, support block 15, reciprocating linear motion device 21, auxiliary device and detection device, the outer cylinder 8 is fixed on the test bench 1 through brackets 2 and 6 , the detection device and the auxiliary device are respectively connected to the holes provided on the outer cylinder 8; the sealing ring installation ring 5 is installed in the outer cylinder 8, and the outer cylinder The two ends of 8 press and seal the sealing ring installation ring 5 through the end cover 4; the sealing main shaft 7 is installed in the outer cylinder 8 and connects with the tension and pressure sensor 14 through the coupling 12 connected; the tension and pressure sensor 14 is connected with the support block 15, and the support block 15 is connected with the reciprocating linear motion device 21; the reciprocating linear motion device 21, the tension and pressure sensor 14 and The auxiliary devices are all electrically connected with the data acquisition control device.

Further, the outer cylinder 8 is provided with an annular drainage groove 8A at a position close to the seal ring installation ring 5; the first openings for the leakage of the liquid medium to flow out are respectively opened on the left and right sides of the bottom of the outer cylinder 8, and the external The upper and lower relative positions of the barrel are respectively provided with second openings for connecting the auxiliary devices. In this way, the leaked medium can smoothly flow into the drainage groove 8A, and collect into the first opening at the bottom of the outer cylinder, and then lead out through the through grooves 4A, 4B, 4C on the end cover 4, ensuring that the leaked medium can be completely drained. It is successfully collected into the leak detection device to ensure the accuracy of measurement.

When used for the hydraulic sealing test, the auxiliary device includes a liquid conduit 24A, a circulation pump 25A, a liquid storage tank 26A and a compressor 27A, and one end of the liquid conduit 24A communicates with the second opening on the outer cylinder 8, The other end is connected to the circulation pump 25A, the circulation pump 25A is connected to the bottom of the liquid storage tank 26A, the top of the liquid storage tank 26A is connected to the compressor 27A, and the upper part of the liquid storage tank 26A is opposite to the position where the liquid conduit is set. The two openings communicate; the detection device includes a catheter 23A and a leakage liquid measuring cup 22A, and one end of the catheter 23A extends into the leakage liquid measuring cup 22A, and the other end is connected to the first opening on the outer cylinder 8. The holes are connected.

Further, the reciprocating linear motion device 21 includes a rotary motor 20 and a crank linkage 19, the rotary motor 20 is fixed on the test bench 1, and the rotary shaft of the rotary motor 20 is connected to the One end of the crank-link mechanism 19 is connected, and the other end of the crank-link mechanism is connected to the bracket 15 .

Further, the end cover 4 is fixed on the outer cylinder 8 by the first bolt 3, and the top end of the end cover 4 is provided with through grooves 4A, 4B, 4C at intervals to ensure that the leaking medium can be smoothly collected into the leak detection device .

Further, the sealing ring installation ring 5 is provided with a groove for installing the sealing ring 9 , and an O-shaped rubber sealing ring 10 is installed between the sealing ring installation ring 5 and the outer cylinder 8 to prevent medium leakage. The installation of the O-shaped rubber sealing ring 10 can prevent the medium from leaking there, and ensure the accuracy of the test results. The form of the groove on the sealing ring installation ring 5 is variable, and different forms of reciprocating shaft seals can be installed. In this way, it is possible to test the sealing performance of various typical reciprocating shaft seals of hydraulic seals and pneumatic seals.

Further, the bracket 15 is installed on the test bench 1 through the bracket 17, the bracket 17 is provided with a slide rail 18, and the bracket 15 can slide along the The rail 18 moves; the support block 15 is connected with the tension-compression sensor 14 through the second bolt 16 .

Further, the two ends of the coupling 12 are threadedly connected to the sealed main shaft 7 and the tension-pressure sensor 14 respectively, and the coupling 12 is arranged between the sealed main shaft 7 and the tension-pressure sensor 14 Lock nuts 11, 13. In this way, the connection between the parts can be ensured firmly, the accuracy of the transmission of the system can be ensured, and the sealed main shaft can reciprocate according to the predetermined displacement amplitude.

Example 2

Referring to Fig. 2, Fig. 4a-Fig. 4d, Fig. 5a-Fig. 6, the difference between this embodiment and Embodiment 1 is that this embodiment is aimed at the pneumatic sealing test, and the detection device includes a suction gun 26B, an air duct 23B and a helium mass spectrometer leak detector 22B, one end of the air guide tube 23B is connected to the helium mass spectrometer leak detector 22B, and the other end communicates with the first opening on the outer cylinder 8; the auxiliary device includes a gas conduit 24B , pressure regulator 25B and helium gas cylinder 27B, described suction gun 26B is arranged on the open end of described helium gas cylinder 27B, and one end of described gas conduit 24B communicates with the second opening on the outer cylinder, and the other One end is connected to the pressure regulator 25B, and the pressure regulator 25B is connected to the suction gun 26B; the second opening on the outer cylinder opposite to the other end of the gas conduit is sealed with a nut 28B.

All the other implementations are the same as in Example 1.

The content described in the embodiments of this specification is only an enumeration of the implementation forms of the inventive concept, and the protection scope of the present utility model should not be regarded as limited to the specific forms stated in the embodiments, and the protection scope of the present utility model also extends to this invention. Equivalent technical means that those skilled in the art can think of according to the concept of the utility model.

Claims (9)

1. the proving installation of a sliding-contact packing sealing property, it is characterized in that: comprise test-bed, urceolus, the O-ring seal installing ring of installation O-ring seal, sealing main shaft, tension-compression sensor, tray, straight reciprocating motion apparatus, servicing unit and pick-up unit, described urceolus is installed on described test-bed by support, and described pick-up unit is connected with the hole be arranged on described urceolus respectively with described servicing unit; Described O-ring seal installing ring is arranged in described urceolus, the two ends of described urceolus by end cap by described O-ring seal installing ring press seal; Described sealing main shaft to be arranged in described urceolus and to be connected with described tension-compression sensor by shaft coupling; Described tension-compression sensor is connected with described tray, and described tray is connected with described straight reciprocating motion apparatus; Described straight reciprocating motion apparatus, tension-compression sensor and servicing unit are all electrically connected with data acquisition control device.

2. proving installation as claimed in claim 1, is characterized in that: the drainage trough described urceolus having ring-type near the position of O-ring seal installing ring; Have the first perforate that the convenient liquid medium leaked flows out in the left and right sides, bottom of urceolus, offer the second perforate of the servicing unit described in connection in the relative position up and down of urceolus respectively.

3. proving installation as claimed in claim 2, it is characterized in that: when testing for hydraulic seal, described servicing unit comprises liquid conduits, ebullator, fluid reservoir and compressor, one end of described liquid conduits is communicated with the second perforate on urceolus, the other end is connected with ebullator, ebullator is connected with the bottom of fluid reservoir, and the top of fluid reservoir is connected with compressor, and the second perforate on the urceolus that the top of fluid reservoir is relative with liquid conduits setting position is communicated with; Described pick-up unit comprises catheter and leakage fluid measuring cup, and described leakage fluid measuring cup is stretched in described catheter one end, and the other end is communicated with the first perforate on urceolus.

4. proving installation as claimed in claim 2, it is characterized in that: when testing for pneumostop, described pick-up unit comprises suction gun, wireway and helium mass spectrometer leak detector, the helium mass spectrometer leak detector described in the connection of one end of described wireway, and the other end is communicated with the first perforate on urceolus; Described servicing unit comprises gas conduit, pressure governor and helium tank, described suction gun is arranged on the openend of described helium tank, one end of described gas conduit is communicated with the second perforate on urceolus, pressure governor described in the other end connects, the suction gun described in described pressure governor connects; The second perforate on the urceolus relative with the other end setting position of gas conduit adopts nut seal.

5. the proving installation as described in claim 3 or 4, it is characterized in that: described straight reciprocating motion apparatus comprises electric rotating machine and toggle, described electric rotating machine is fixed on described test-bed, the turning axle of described electric rotating machine is connected with one end of described toggle, the tray described in other end connection of described toggle.

6. proving installation as claimed in claim 5, is characterized in that: described end cap is bolted on urceolus by first, and the top of described end cap is arranged at intervals with and ensures that the medium leaked can collect the groove in leakage detection apparatus smoothly.

7. proving installation as claimed in claim 6 is put, and it is characterized in that: described O-ring seal installing ring offers the groove installing O-ring seal, and install the O shape rubber seal being equipped with and preventing dielectric leakage between described O-ring seal installing ring and urceolus.

8. proving installation as claimed in claim 7, is characterized in that: described tray is by tray support installing on described test-bed, and described tray support is provided with slide rail, and described tray can move along described slide rail; Described tray is connected with tension-compression sensor by the second bolt.

9. proving installation as claimed in claim 8, is characterized in that: the two ends of described shaft coupling are threaded with described sealing main shaft and tension-compression sensor respectively, and is provided with set nut between described shaft coupling and sealing main shaft and tension-compression sensor.