CN218235116U - Real-time detection device for axial load of bearing and shield machine - Google Patents

Abstract

The utility model relates to a bearing axial load real-time detection device and shield construct machine. A real-time detection device for axial load of a bearing comprises a base body fixed to one of an inner ring and an outer ring of the bearing to be detected, wherein the base body is provided with a ring body corresponding part which is arranged at intervals along the axial direction of the bearing to be detected with the end surface of the other of the inner ring and the outer ring of the bearing to be detected; a piston cavity with an axis parallel to the axis of the bearing to be detected is arranged on the corresponding part of the ring body; the piston is assembled in the piston cavity in a guiding and moving way; a liquid medium is filled in one side of the piston, which is back to the outer end of the piston, in the piston cavity, and a pressure detection port is also arranged on the base body and is used for being connected with a pressure detection device to detect the pressure intensity of the liquid medium; the real-time detection device for the axial load of the bearing further comprises a rolling support structure, wherein the rolling support structure is used for being supported between the outer end of the piston and the end face of the inner ring or the end face of the outer ring of the bearing to be detected, which is arranged at intervals corresponding to the ring body, so that the real-time detection of the axial load of the bearing is realized.

Description

Real-time detection device for axial load of bearing and shield machine

Technical Field

The utility model relates to a bearing axial load real-time detection device and shield construct machine.

Background

The turntable bearing is a large bearing with a special structure which can bear the comprehensive loads such as larger axial load, radial load, overturning moment and the like and integrates multiple functions of supporting, rotating, transmitting, fixing and the like. In general, the turntable bearing is provided with a mounting hole, lubricating oil and a sealing device, so that different requirements of various hosts working under different working conditions can be met; the turntable bearing has the characteristics of compact structure, convenient guide rotation, simple and convenient installation, easy maintenance and the like, and is widely applied to large-scale rotating devices such as hoisting and transporting machinery, mining machines, constructional engineering machinery, port machinery, wind power generation, medical equipment, radars, missile launcher and the like.

If the utility model discloses a high accuracy heavy load slewing bearing of crossing roller and four spotlights combination, this slewing bearing is applicable to the main shaft bearing of shield structure machine that discloses in the utility model patent of granting bulletin for CN202348971U, granting bulletin day 2012.07.23. During assembly, the inner ring of the turntable bearing is fixed on a bearing base on the shield machine main body, the outer ring is fixedly connected with a cutter head, and a cutter is installed on the cutter head. In the tunneling process of the shield tunneling machine, the outer ring rotates under the driving of the gear by means of the teeth on the outer peripheral surface of the outer ring, the cutter head and the cutter are driven to rotate, and the tunneling purpose is achieved.

The problem that the cutter of the shield machine is damaged or even the cutter head is damaged due to the fact that the propelling force of the shield machine cannot be detected in real time in the prior art is occasionally caused. The axial load of the shield machine is high (at present, the maximum axial load can reach more than 8000 tons), and the shield machine has a compact structure, so that the measurement of the propelling force cannot be carried out by adopting a pressure measurement means in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a real-time detection device for the axial load of a bearing, so as to realize the real-time detection of the axial load of the bearing; an object of the utility model is also to provide a shield constructs machine to the realization prevents that the propulsive force from too big causing the damage to equipment to the real-time detection of shield constructs machine propulsive force.

The utility model discloses in a bearing axial load real-time detection device adopts following technical scheme:

a real-time detection device for axial load of a bearing comprises a base body and a piston;

a base body for fixing to one of an inner ring and an outer ring of a bearing to be detected;

the base body is provided with a ring body corresponding part, and the ring body corresponding part is used for being arranged at intervals with the end surface of the other one of the inner ring and the outer ring along the axial direction of the bearing to be detected;

a piston cavity is arranged on the corresponding part of the ring body, a piston is assembled in the piston cavity in a guiding and moving mode, and the piston is used for extending towards the end faces of the inner ring and the outer ring;

the piston cavity is filled with liquid medium, the base body is also provided with a pressure detection port communicated with the piston cavity, and the pressure detection port is used for being connected with a pressure detection device so as to detect the pressure intensity of the liquid medium generated under the action of the piston;

the real-time bearing axial load detection device further comprises a rolling support structure, wherein the rolling support structure comprises a rolling body, and the inner ring or the outer ring transmits the axial load to the corresponding part of the ring body through the rolling body.

The utility model has the advantages that: when the device is used, a base body of the real-time bearing axial load detection device is fixed on one of an inner ring and an outer ring of a bearing to be detected, a rolling support structure is supported between the other of the inner ring and the outer ring of the bearing to be detected and the outer end of a piston in a rolling mode, when the bearing bears the axial load, the axial load is transmitted into a piston cavity through the piston and is expressed as the pressure of a liquid medium in the piston cavity, the pressure of the liquid medium can be obtained through the pressure detection device, the axial load of the bearing can be calculated according to the pressure of the liquid medium and the corresponding stress area of the piston cavity, and therefore real-time detection of the axial load of the bearing is achieved. In addition, the arrangement of the rolling support structure can reduce abrasion, avoid influencing the smooth rotation of the bearing, and prevent the piston from rotating along with the inner ring or the outer ring to influence the axial load detection result.

As a preferred technical scheme: the base body is an annular base body and is used for being coaxially fixed on the bearing to be detected.

Has the advantages that: by adopting the technical scheme, the base body can be conveniently manufactured and installed, and the bearing can be coaxially fixed on the bearing to be detected, so that the uniform stress can be ensured.

As a preferred technical scheme: the piston is the column, and has evenly arranged a plurality ofly along base member circumference, the piston chamber is equipped with a plurality ofly to arrange with the piston one-to-one.

Has the beneficial effects that: by adopting the technical scheme, the structure of a single piston is relatively simple, and the design and processing of the piston are facilitated.

As a preferred technical scheme: the base body comprises a plurality of base body modules, each base body module is used for being arranged around the axis of the bearing to be detected, and each base body module is provided with the piston cavity.

Has the advantages that: by adopting the technical scheme, the base body is composed of the plurality of base body modules, so that the size of each base body module is small, and the base body is convenient to process.

As a preferred technical scheme: the piston cavities are communicated with each other, and one pressure detection port is arranged on the base body.

Has the beneficial effects that: by adopting the technical scheme, the pressure of the liquid medium can be obtained by only arranging one pressure detection device, and the whole structure is favorably simplified.

As a preferred technical scheme: the rolling supporting structure is a thrust self-aligning roller bearing.

Has the beneficial effects that: by adopting the technical scheme, the arrangement of the rolling supporting structure is convenient.

As a preferred technical scheme: and bearing ring body mounting grooves are formed in the inner ring or the outer ring of the piston and the inner ring or the outer ring corresponding to the corresponding part of the ring body, and are used for embedding the ring body at the corresponding end of the self-aligning thrust roller bearing.

Has the advantages that: by adopting the technical scheme, the self-aligning thrust roller bearing can bear certain radial force, and the load bearing capacity of the bearing to be detected can be improved.

As a preferred technical scheme: and the base body is provided with a base body mounting hole which is used for corresponding to a ring body connecting hole on a corresponding inner ring or outer ring of the bearing to be detected.

Has the advantages that: by adopting the technical scheme, when the real-time bearing axial load detection device is installed on the bearing, the annular base body installation hole is used for the fastener penetrating through the ring body connection hole to penetrate, so that the annular base body and the corresponding inner ring or outer ring of the bearing are fixed simultaneously, and thus, the installation and use of the real-time bearing axial load detection device on the bearing can be realized on the basis of not changing the structure of the existing bearing.

The utility model discloses well shield constructs the machine and adopts following technical scheme:

the shield machine comprises a bearing base, a turntable bearing and a cutter head, wherein the turntable bearing is fixed on the bearing base, and the cutter head is rotationally arranged through the turntable bearing;

the device also comprises a real-time detection device for the axial load of the bearing, wherein the real-time detection device for the axial load of the bearing comprises a base body and a piston;

a base body for fixing to one of an inner ring and an outer ring of a turntable bearing or formed by the inner ring or the outer ring of a bearing to be detected;

the base body is provided with a ring body corresponding part which is used for being arranged at intervals with the end surface of the other one of the inner ring and the outer ring of the bearing to be detected along the axial direction of the bearing to be detected;

a piston cavity is arranged on the corresponding part of the ring body, and the axis of the piston cavity is parallel to the axis of the turntable bearing;

the piston is movably assembled in the piston cavity in a guiding way;

the piston cavity is filled with liquid medium at one side of the piston back to the outer end of the piston, the base body is also provided with a pressure detection port communicated with the piston cavity, and the pressure detection port is used for being connected with a pressure detection device to detect the pressure intensity of the liquid medium;

the real-time bearing axial load detection device also comprises a rolling support structure, and the rolling support structure is used for rolling and supporting between the outer end of the piston and the end surface of the inner ring or the outer ring arranged at intervals at the corresponding part of the turntable bearing and the ring body.

The beneficial effects of the utility model are that: during the propelling process of the shield tunneling machine, the reaction force of the propelling force is transmitted to the turntable bearing and is expressed in the form of axial load. When the bearing axial load real-time detection device is used, a base body of the bearing axial load real-time detection device is fixed on one of an inner ring and an outer ring of a turntable bearing, a rolling support structure is supported between the other of the inner ring and the outer ring of the turntable bearing and the outer end of a piston in a rolling mode, when the bearing bears the axial load, the axial load is transmitted into a piston cavity through the piston and is expressed as the pressure of a liquid medium in the piston cavity, the pressure of the liquid medium can be obtained through the pressure detection device, the axial load of the turntable bearing can be calculated through the pressure of the liquid medium and the stress area of the piston cavity, and then the propelling force of the shield machine is obtained, so that the real-time detection of the axial load of the turntable bearing is realized, and the damage to equipment caused by the overlarge propelling force is prevented. In addition, the arrangement of the rolling support structure can prevent the piston from rotating along with the inner ring or the outer ring, and the axial load detection result is prevented from being influenced.

Furthermore, the base body is an annular base body and is coaxial with the turntable bearing when the base body is fixed on the turntable bearing, the piston is an annular piston coaxial with the base body, the base body is provided with an annular groove coaxial with the base body, the annular groove forms the piston cavity, and the piston and the base body are both annular, so that the base body can be conveniently fixed on the turntable bearing; in addition, the piston cavity is formed by an annular groove coaxial with the base body, and only one pressure detection port can be arranged, so that the integral structure is simplified.

Furthermore, the piston is columnar, a plurality of pistons are uniformly arranged along the circumferential direction of the base body, the piston cavity is provided with a plurality of pistons in one-to-one correspondence, and therefore the structure of a single piston is relatively simple, and the design and the processing of the pistons are facilitated.

Furthermore, the base body comprises a plurality of base body modules, each base body module is used for being arranged around the axis of the bearing to be detected, and each base body module is provided with the piston cavity. The base body comprises a plurality of base body modules, so that the size of each base body module is small, and the base body is convenient to process.

Furthermore, all the piston cavities are communicated with each other, one pressure detection port is arranged on the base body, and the pressure of the liquid medium can be obtained only by arranging one pressure detection device, so that the whole structure is simplified.

Furthermore, a circumferential stopping structure is arranged between the piston cavity and the piston to prevent the piston from rotating along the circumferential direction of the base body, and the axial load detection result is prevented from being influenced.

Furthermore, a key groove extending along the axial direction of the base body is formed in the piston cavity, a key inserted into the key groove is arranged on the piston, and the key groove form the circumferential stopping structure which is simple in structure and convenient to machine.

Furthermore, the rolling supporting structure is a self-aligning thrust roller bearing, and the self-aligning thrust roller bearing can bear a certain radial force, so that the real-time axial load detection device of the bearing is better used for detecting the axial load of the turntable bearing.

Furthermore, a base body mounting hole is formed in the base body, and the base body mounting hole is used for corresponding to a ring body connecting hole in a corresponding inner ring or outer ring of the bearing to be detected. When the real-time bearing axial load detection device is installed on the turntable bearing, the base body installation hole is used for the fastener penetrating through the ring body connection hole to penetrate, so that the base body and the corresponding inner ring or outer ring of the turntable bearing are fixed simultaneously, and therefore the real-time bearing axial load detection device can be installed and used on the turntable bearing on the basis of not changing the structure of the existing turntable bearing.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of a real-time detection device for axial load of a bearing according to the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the device for detecting an axial load of a bearing in real time according to the present invention.

In the figure: 1. an outer ring; 11. a threaded hole; 12. teeth; 13. an outer ring bearing mounting groove; 2. an inner ring; 21. inner ring connecting holes; 3. an annular base; 31. an annular base mounting hole; 32. a piston cavity; 33. a pressure detection port; 34. an annular base mounting hole; 35. an annular base connection hole; 36. a loop body corresponding portion; 4. a piston; 41. a piston bearing mounting groove; 5. a thrust self-aligning roller bearing; 6. a spherical roller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as the terms first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises a … …" defines an element that may occur does not preclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The following describes embodiments of the present invention with reference to the accompanying drawings.

The utility model discloses in a bearing axial load real-time detection device's embodiment one, as shown in FIG. 1, treat that the bearing is the carousel bearing of shield structure machine, specific three rows of roller carousel bearing of treating in this embodiment. The turntable bearing comprises an inner ring 2 and an outer ring 1, wherein the outer ring 1 is used for being connected with a cutter head of the shield tunneling machine, and the inner ring 2 is used for being connected with a bearing base of the shield tunneling machine. When the turntable bearing works, the teeth 12 arranged on the outer ring 1 are meshed with the gear, and the outer ring 1 is driven to rotate through the gear.

The real-time detection device for the axial load of the bearing comprises a base body 3 and a piston 4, wherein the base body 3 is an annular base body, the piston 4 is an annular piston, the inner diameter of the base body 3 is the same as that of the inner ring 2, an annular groove is formed in the base body 3, the annular groove forms a piston cavity 32 of the base body 3, the piston cavity 32 is overlapped with the axis of the turntable bearing, and the piston 4 is assembled in the piston cavity 32 in a guiding and moving mode. The piston chamber 32 is filled with hydraulic oil as liquid medium in the side of the piston 4 facing away from the outer end of the piston 4. The base body 3 is provided with a pressure detection port 33 communicated with the piston cavity 32, and the pressure sensor is communicated with the piston cavity 32 through the pressure detection port 33 so as to detect the pressure of hydraulic oil. The pressure sensor is the pressure measuring device in this embodiment, and in other embodiments, the pressure measuring device may also be a pressure gauge. The part of the base body 3 provided with the annular groove is used as a ring body corresponding part 36, and the ring body corresponding part 36 and the outer ring 1 are arranged at intervals along the axial direction of the turntable bearing.

The outer ring 1 of the turntable bearing is provided with a threaded hole 11 for connecting with a cutter head of the shield tunneling machine; an inner ring connecting hole 21 serving as a ring body connecting hole is formed in the inner ring 2 of the turntable bearing and is used for being connected with a bearing base of the shield tunneling machine; the base body 3 is provided with a base body mounting hole 31 corresponding to the inner ring connecting hole 21. The piston 4 is equipped with piston bearing mounting groove 41 on being close to the terminal surface of outer lane 1, is equipped with outer lane bearing mounting groove 13 on the terminal surface of outer lane 1 near piston 4, and piston bearing mounting groove 41 sets up with outer lane bearing mounting groove 13 relatively to be equipped with the thrust self-aligning roller bearing 5 that supports between the terminal surface of piston 4 outer end and outer lane 1 in two bearing mounting grooves, prevent that piston 4 from rotating along with the outer lane, conduct axial load simultaneously. In addition, a key groove (not shown in the figure) extending along the axial direction is formed in the piston 4, a key (not shown in the figure) matched with the key groove is formed in the piston cavity 32, the piston 4 and the piston cavity 32 are further prevented from rotating along with the outer ring 1 through the matching of the key groove and the key, a certain gap is formed between the key and the key groove so as to avoid influencing the axial movement of the piston 4, and the key groove are used as the circumferential stopping structure of the embodiment.

When the shield tunneling machine is assembled, the self-aligning thrust roller bearing 5 is assembled in the piston bearing mounting groove 41 and the outer ring bearing mounting groove 13; the base body 3 is fixedly connected with the bearing base through a fastener penetrating through the inner ring connecting hole 21 and the base body mounting hole 31; the outer ring 1 is fixedly connected with the cutter head through a screw passing through the threaded hole 11. In this embodiment, the position of the inner ring connecting hole 21 is the same as the position when the real-time bearing axial load detection device is not provided, so that the real-time bearing axial load detection device can be installed between the inner ring 2 and the bearing base without changing the structure of the inner ring 2 and the bearing base.

When the shield machine performs tunneling operation, the reaction force of the propelling force is transmitted to the turntable bearing in the propelling process of the shield machine and is expressed in the form of axial load. The real-time bearing axial load detection device is arranged between the turntable bearing and the bearing base, bears the axial load of the turntable bearing, expresses the propelling force in the piston cavity, enables the hydraulic oil in the piston cavity to generate pressure, measures the pressure intensity of the hydraulic oil through the pressure sensor, and then calculates the current propelling force through the following formula.

F=ηPS

F in the formula is the propelling force of the shield tunneling machine; eta is the load factor; p is the pressure of the hydraulic oil; s is the stressed area of the substrate 3 bearing the axial acting force of the hydraulic oil in the piston cavity 32. The magnitude of eta values of different bearing axial load real-time detection devices can be measured according to experiments, specifically, after the bearing axial load real-time detection devices and the turntable bearing are assembled, the bearing axial load real-time detection devices and the turntable bearing are installed on a loading device, a specific axial load F is loaded on the turntable bearing through the loading device, meanwhile, the pressure intensity P of hydraulic oil in the piston cavity 32 is measured through a pressure sensor, the stress area S of the piston 3 can be calculated according to the size of the piston cavity 32, and the corresponding eta value is calculated according to the three data F, P, S; and loading different or same axial loads on the turntable bearing for multiple times, calculating to obtain corresponding eta values, and finally taking the average value of the eta values as the eta value of a bearing assembly consisting of the bearing axial load real-time detection device and the corresponding turntable bearing. When the turntable bearing works, S is known, eta is known, and F value can be correspondingly obtained only by measuring P value through the pressure sensor, so that the propelling force of the shield tunneling machine can be obtained.

Taking a turntable bearing with the diameter of 7 meters as an example, the stress area of the base body 3 bearing the axial acting force of hydraulic oil in the piston cavity 32 can be designed to be about 9 square meters, when the turntable bearing bears 8000 tons of axial load, the load rate is 0.8, the pressure in the piston cavity 32 is about 10MPa, and the pressure belongs to low-pressure, and the pressure in the piston cavity 32 is branch pressure generated after deformation of a raceway of the turntable bearing, so that the maximum axial load cannot be reached in the piston cavity 32, the sealing requirement is not very high, and the problems of internal leakage, external leakage and the like of the base body 3 do not need to be worried about.

The axial load of slewing bearing is born by the roller between former inner circle 2 and the outer lane 1, becomes the utility model discloses a roller between inner circle 2 and the outer lane 1 and the roller of setting at thrust self-aligning roller bearing 5 between piston 4 and outer lane 1 bear jointly, multiplicable slewing bearing's life. Preferably, the turntable bearing should have a shock load resistance, preventing leakage in the base body 3 from causing impact forces to the turntable bearing.

The real-time detection device for the axial load of the bearing can detect the propelling force of the shield machine in real time in an online manner during operation, solves the problem that the propelling force is too large to damage equipment due to geological problems in the propelling process of the shield machine, and plays roles of defense and early warning.

The device only increases the mounting height of the turntable bearing while not changing the mounting size and structure of the original turntable bearing, and can meet the structural requirements of the shield tunneling machine. In this embodiment, the axial dimension of the base body 3 is set to 90mm, so as to reduce the influence of the base body 3 on the mounting height of the turntable bearing as much as possible while satisfying the structural strength and the use requirements of the base body 3. Of course, in other embodiments, the axial dimension of the base may be set to other values depending on its structural strength and use requirements.

The utility model discloses well bearing axial load real-time detection device's embodiment two, as shown in FIG. 2, the bearing axial load real-time detection device in this embodiment lies in with the difference of above-mentioned embodiment one: a plurality of spherical rollers 6 are arranged between the piston 4 and the outer ring 1, and a retainer (not shown in the figure) is arranged between the spherical rollers 6 and the outer ring 1, each spherical roller 6 is held at a set position by the retainer, and the spherical rollers 6 and the retainer together replace the self-aligning thrust roller bearing in the first embodiment. The retainer is a retainer on the bearing for maintaining the relative positions of the rollers.

The base body 3 is provided with a base body mounting hole 34 corresponding to the inner ring connecting hole 21, the base body mounting hole 34 is a threaded hole, and the inner ring 2 and the base body 3 are fixedly connected through a threaded fastener which penetrates through the piston mounting hole and is in threaded connection with the base body mounting hole 34. Still be equipped with base member connecting hole 35 on base member 3, and base member connecting hole 35 is equipped with two circles along 3 circumference of base member, and base member 3 is through the fastener and the bearing base fixed connection who pass base member connecting hole 35, and at this moment, the bearing base structure of shield structure machine need with base member 3 phase-match to realize base member 3 and bearing base's fixed connection.

In the first embodiment, the bearing to be detected is a three-row roller type turntable bearing, and in other embodiments, the real-time detection device for the axial load of the bearing may also be used for real-time detection of the axial load of other types of bearings, for example: the device is used for detecting the axial load of the self-aligning thrust roller bearing 5 in real time, the base body is fixed with the inner ring 2 or the outer ring 1 of the self-aligning thrust roller bearing 5 at the moment, and the rolling support structure is supported between the outer end of the piston 4 and the end face of the inner ring 2 or the end face of the outer ring 1 of the self-aligning thrust roller bearing 5 arranged at intervals with the corresponding part 36 of the ring body in a rolling manner; or for real-time detection of the axial load of the slewing bearing disclosed in the patent documents in the background art.

In other embodiments, the piston cavity 32 may be provided with a base block and the piston 4 block is provided on the outer wall of the piston 4, wherein at least two of the base block or the piston 4 block are circumferentially spaced, so that the base block and the piston 4 block are circumferentially engaged to prevent the piston 4 from rotating along the base, and at this time, the piston 4 block and the base block serve as circumferential blocking structures.

While the outer end of the piston 4 in the above embodiment 1 is disposed to extend out of the piston cavity 32, in other embodiments, the outer end of the piston 4 may be located in the piston cavity 32, and the self-aligning thrust roller bearing 5 extends into the piston cavity 32 and is supported between the end surface of the outer end of the piston 4 and the end surface of the outer ring 1.

While the piston chamber 32 of embodiment 1 is formed by an annular groove, in other embodiments, the piston 4 may be formed by a plurality of circular or square grooves arranged at intervals along the axial direction of the base body, in which case, the piston chambers 32 may be communicated with each other or separated from each other; when the piston cavities 32 are communicated with each other, the pressure of the hydraulic oil can be detected only by arranging one pressure detection port, a plurality of pressure detection ports 33 can also be arranged along the circumferential direction of the base body, a plurality of pressure values are detected by the pressure detection ports 33, the average value of the plurality of pressure values is used as the final pressure value, or the maximum value of the plurality of pressure values is used as the final pressure value, or the final pressure value is obtained by comprehensively analyzing the pressure values; when the piston cavities 32 are separated from each other, the pressure detection ports 33 should be disposed on the piston cavities 32, a plurality of pressure values are detected by the pressure detection ports 33, an average value of the plurality of pressure values is used as a final pressure value, or a maximum value of the plurality of pressure values is used as a final pressure value, or the final pressure value is obtained by comprehensively analyzing the pressure values.

In other embodiments, a plurality of pressure detection ports 33 may be circumferentially disposed on the base, a plurality of pressure values are detected at each pressure detection port 33, an average value of the plurality of pressure values is used as a final pressure value, or a maximum value of the plurality of pressure values is used as a final pressure value, or each pressure value is comprehensively analyzed to obtain a final pressure value.

The base body in the above embodiment 1 is the annular base body 3, and the annular base body 3 is coaxial with the turntable bearing, in other embodiments, the base body may be composed of a plurality of base body modules arranged at intervals along the circumferential direction of the bearing to be detected, each base body module is correspondingly provided with a piston cavity 32, a piston 4 assembled in the piston cavity 32 in a guiding and moving manner, and a corresponding rolling support structure, and each piston cavity 32 is provided with a pressure detection port 33 for connecting with a pressure detection device to detect the pressure of the liquid medium.

The piston cavity 32 in the above embodiment 1 is formed by an annular groove with an inverted T-shaped cross section, the cross section of the piston 4 is also inverted T-shaped, at this time, the piston cavity 32 should be formed by at least two parts for inserting the piston 4, when the piston 4 is installed, the piston 4 is guided to move and assembled on one part of the piston cavity 32, and then the other parts forming the piston cavity 32 are fixed to form the piston cavity 32; in other embodiments, the piston cavity 32 may also be formed by an annular groove with a rectangular cross section, in this case, the piston 4 is the piston 4 with the rectangular cross section, which is adapted to the piston cavity 32, in this case, the piston cavity 32 may be disposed on an integral structure, and when the piston 4 is installed, the piston 4 may be directly installed from the notch of the annular groove.

The utility model discloses well shield constructs specific embodiment of machine, shield construct the machine and include bearing base, carousel bearing and blade disc, and the blade disc is installed on carousel bearing, be equipped with bearing axial load real-time detection device between carousel bearing and the bearing base, bearing axial load real-time detection device in this embodiment and an arbitrary embodiment of above-mentioned bearing axial load real-time detection device's structure the same, no longer give unnecessary details.

Claims (9)

1. A real-time detection device for axial load of a bearing is characterized by comprising a base body (3) and a piston (4);

a base body (3) for fixing to one of an inner ring (2) and an outer ring (1) of a bearing to be detected;

the base body (3) is provided with a ring body corresponding part (36), and the ring body corresponding part (36) is used for being arranged at intervals with the end surface of the other one of the inner ring (2) and the outer ring (1) along the axial direction of the bearing to be detected;

a piston cavity (32) is arranged on the ring body corresponding part (36), a piston (4) is assembled in the piston cavity (32) in a guiding and moving mode, and the piston (4) is used for extending towards the end faces of the inner ring (2) and the outer ring (1);

the piston cavity (32) is filled with liquid medium, the base body (3) is also provided with a pressure detection port (33) communicated with the piston cavity (32), and the pressure detection port (33) is used for being connected with a pressure detection device to detect the pressure generated by the liquid medium under the action of the piston (4);

the real-time bearing axial load detection device further comprises a rolling support structure, wherein the rolling support structure comprises a rolling body, and the inner ring (2) or the outer ring (1) is used for transmitting the axial load to the ring body corresponding part (36) through the rolling body.

2. The device for detecting the axial load of the bearing in real time as claimed in claim 1, wherein the base body (3) is an annular base body and is used for being coaxially fixed on the bearing to be detected.

3. The device for detecting the axial load of the bearing in real time as claimed in claim 1, wherein the pistons (4) are cylindrical, a plurality of pistons are uniformly arranged along the circumferential direction of the base body (3), and a plurality of piston cavities (32) are arranged and correspond to the pistons (4) one by one.

4. A real-time detection device for the axial load of a bearing according to claim 3, wherein the base body (3) comprises a plurality of base body modules, each base body module is used for being arranged around the axis of the bearing to be detected, and each base body module is provided with the piston cavity (32).

5. A real-time detection device for the axial load of a bearing as claimed in claim 3, wherein the piston cavities (32) are communicated with each other, and one pressure detection port (33) is arranged on the base body (3).

6. The real-time bearing axial load detection device according to any one of claims 1 to 5, wherein the rolling support structure is a self-aligning thrust roller bearing (5).

7. The real-time bearing axial load detection device as claimed in claim 6, wherein the inner ring (2) or the outer ring (1) corresponding to the ring body corresponding part (36) on the piston (4) is provided with a bearing ring body mounting groove for embedding the ring body at the corresponding end of the self-aligning thrust roller bearing (5).

8. The real-time bearing axial load detection device according to any one of claims 1 to 5, wherein a base body mounting hole (34) is formed in the base body (3), and the base body mounting hole (34) is used for corresponding to a ring body connecting hole in a corresponding inner ring (2) or outer ring (1) of a bearing to be detected.

9. The shield machine comprises a bearing base, a turntable bearing and a cutter head, wherein the turntable bearing is fixed on the bearing base, and the cutter head is rotationally arranged through the turntable bearing;

characterized in that it further comprises a device for real-time detection of the axial load of a bearing according to any one of claims 1 to 8, wherein the base body (3) of the device for real-time detection of the axial load of a bearing is formed by the inner ring (2) or the outer ring (1) of the bearing to be detected, or by a part separate from the bearing to be detected.

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